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2952 lines
165 KiB
HTML
2952 lines
165 KiB
HTML
<!doctype html>
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<title>CodeMirror: User Manual</title>
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<meta charset="utf-8"/>
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<link rel=stylesheet href="docs.css">
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<script src="activebookmark.js"></script>
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<script src="../lib/codemirror.js"></script>
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<link rel="stylesheet" href="../lib/codemirror.css">
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<script src="../addon/runmode/runmode.js"></script>
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<script src="../addon/runmode/colorize.js"></script>
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<script src="../mode/javascript/javascript.js"></script>
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<script src="../mode/xml/xml.js"></script>
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<script src="../mode/css/css.js"></script>
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<script src="../mode/htmlmixed/htmlmixed.js"></script>
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<style>
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dt { text-indent: -2em; padding-left: 2em; margin-top: 1em; }
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dd { margin-left: 1.5em; margin-bottom: 1em; }
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dt {margin-top: 1em;}
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dd dl, dd dt, dd dd, dd ul { margin-top: 0; margin-bottom: 0; }
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dt + dt { margin-top: 0; }
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dt.command { position: relative; }
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span.keybinding { position: absolute; right: 0; font-size: 80%; color: #555; text-indent: 0; }
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</style>
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<div id=nav>
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<a href="http://codemirror.net"><img id=logo src="logo.png"></a>
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<ul>
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<li><a href="../index.html">Home</a></li>
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<li><a href="#overview" class=active data-default="true">Manual</a></li>
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<li><a href="https://github.com/marijnh/codemirror">Code</a></li>
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</ul>
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<ul>
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<li><a href="#usage">Basic Usage</a></li>
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<li><a href="#config">Configuration</a></li>
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<li><a href="#events">Events</a></li>
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<li><a href="#keymaps">Key maps</a></li>
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<li><a href="#commands">Commands</a></li>
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<li><a href="#styling">Customized Styling</a></li>
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<li><a href="#api">Programming API</a>
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<ul>
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<li><a href="#api_constructor">Constructor</a></li>
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<li><a href="#api_content">Content manipulation</a></li>
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<li><a href="#api_selection">Selection</a></li>
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<li><a href="#api_configuration">Configuration</a></li>
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<li><a href="#api_doc">Document management</a></li>
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<li><a href="#api_history">History</a></li>
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<li><a href="#api_marker">Text-marking</a></li>
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<li><a href="#api_decoration">Widget, gutter, and decoration</a></li>
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<li><a href="#api_sizing">Sizing, scrolling, and positioning</a></li>
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<li><a href="#api_mode">Mode, state, and tokens</a></li>
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<li><a href="#api_misc">Miscellaneous methods</a></li>
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<li><a href="#api_static">Static properties</a></li>
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</ul>
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</li>
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<li><a href="#addons">Addons</a></li>
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<li><a href="#modeapi">Writing CodeMirror Modes</a></li>
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</ul>
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</div>
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<article>
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<section class=first id=overview>
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<h2 style="position: relative">
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User manual and reference guide
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<span style="color: #888; font-size: 1rem; position: absolute; right: 0; bottom: 0">version 4.6.0</span>
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</h2>
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<p>CodeMirror is a code-editor component that can be embedded in
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Web pages. The core library provides <em>only</em> the editor
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component, no accompanying buttons, auto-completion, or other IDE
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functionality. It does provide a rich API on top of which such
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functionality can be straightforwardly implemented. See
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the <a href="#addons">addons</a> included in the distribution,
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and the <a href="https://github.com/marijnh/CodeMirror/wiki/CodeMirror-addons">list
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of externally hosted addons</a>, for reusable
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implementations of extra features.</p>
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<p>CodeMirror works with language-specific modes. Modes are
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JavaScript programs that help color (and optionally indent) text
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written in a given language. The distribution comes with a number
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of modes (see the <a href="../mode/"><code>mode/</code></a>
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directory), and it isn't hard to <a href="#modeapi">write new
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ones</a> for other languages.</p>
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</section>
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<section id=usage>
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<h2>Basic Usage</h2>
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<p>The easiest way to use CodeMirror is to simply load the script
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and style sheet found under <code>lib/</code> in the distribution,
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plus a mode script from one of the <code>mode/</code> directories.
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(See <a href="compress.html">the compression helper</a> for an
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easy way to combine scripts.) For example:</p>
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<pre data-lang="text/html"><script src="lib/codemirror.js"></script>
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<link rel="stylesheet" href="../lib/codemirror.css">
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<script src="mode/javascript/javascript.js"></script></pre>
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<p>(Alternatively, use a module loader. <a href="#modloader">More
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about that later.</a>)</p>
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<p>Having done this, an editor instance can be created like
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this:</p>
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<pre data-lang="javascript">var myCodeMirror = CodeMirror(document.body);</pre>
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<p>The editor will be appended to the document body, will start
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empty, and will use the mode that we loaded. To have more control
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over the new editor, a configuration object can be passed
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to <a href="#CodeMirror"><code>CodeMirror</code></a> as a second
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argument:</p>
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<pre data-lang="javascript">var myCodeMirror = CodeMirror(document.body, {
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value: "function myScript(){return 100;}\n",
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mode: "javascript"
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});</pre>
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<p>This will initialize the editor with a piece of code already in
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it, and explicitly tell it to use the JavaScript mode (which is
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useful when multiple modes are loaded).
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See <a href="#config">below</a> for a full discussion of the
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configuration options that CodeMirror accepts.</p>
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<p>In cases where you don't want to append the editor to an
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element, and need more control over the way it is inserted, the
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first argument to the <code>CodeMirror</code> function can also
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be a function that, when given a DOM element, inserts it into the
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document somewhere. This could be used to, for example, replace a
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textarea with a real editor:</p>
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<pre data-lang="javascript">var myCodeMirror = CodeMirror(function(elt) {
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myTextArea.parentNode.replaceChild(elt, myTextArea);
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}, {value: myTextArea.value});</pre>
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<p>However, for this use case, which is a common way to use
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CodeMirror, the library provides a much more powerful
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shortcut:</p>
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<pre data-lang="javascript">var myCodeMirror = CodeMirror.fromTextArea(myTextArea);</pre>
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<p>This will, among other things, ensure that the textarea's value
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is updated with the editor's contents when the form (if it is part
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of a form) is submitted. See the <a href="#fromTextArea">API
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reference</a> for a full description of this method.</p>
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<h3 id=modloader>Module loaders</h3>
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<p>The files in the CodeMirror distribution contain shims for
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loading them (and their dependencies) in AMD or CommonJS
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environments. If the variables <code>exports</code>
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and <code>module</code> exist and have type object, CommonJS-style
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require will be used. If not, but there is a
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function <code>define</code> with an <code>amd</code> property
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present, AMD-style (RequireJS) will be used.</p>
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<p>It is possible to
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use <a href="http://browserify.org/">Browserify</a> or similar
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tools to statically build modules using CodeMirror. Alternatively,
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use <a href="http://requirejs.org/">RequireJS</a> to dynamically
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load dependencies at runtime. Both of these approaches have the
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advantage that they don't use the global namespace and can, thus,
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do things like load multiple versions of CodeMirror alongside each
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other.</p>
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<p>Here's a simple example of using RequireJS to load CodeMirror:</p>
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<pre data-lang="javascript">require([
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"cm/lib/codemirror", "cm/mode/htmlmixed/htmlmixed"
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], function(CodeMirror) {
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CodeMirror.fromTextArea(document.getElementById("code"), {
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lineNumbers: true,
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mode: "htmlmixed"
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});
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});</pre>
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<p>It will automatically load the modes that the mixed HTML mode
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depends on (XML, JavaScript, and CSS).</p>
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</section>
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<section id=config>
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<h2>Configuration</h2>
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<p>Both the <a href="#CodeMirror"><code>CodeMirror</code></a>
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function and its <code>fromTextArea</code> method take as second
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(optional) argument an object containing configuration options.
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Any option not supplied like this will be taken
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from <a href="#defaults"><code>CodeMirror.defaults</code></a>, an
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object containing the default options. You can update this object
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to change the defaults on your page.</p>
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<p>Options are not checked in any way, so setting bogus option
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values is bound to lead to odd errors.</p>
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<p>These are the supported options:</p>
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<dl>
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<dt id="option_value"><code><strong>value</strong>: string|CodeMirror.Doc</code></dt>
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<dd>The starting value of the editor. Can be a string, or
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a <a href="#api_doc">document object</a>.</dd>
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<dt id="option_mode"><code><strong>mode</strong>: string|object</code></dt>
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<dd>The mode to use. When not given, this will default to the
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first mode that was loaded. It may be a string, which either
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simply names the mode or is
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a <a href="http://en.wikipedia.org/wiki/MIME">MIME</a> type
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associated with the mode. Alternatively, it may be an object
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containing configuration options for the mode, with
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a <code>name</code> property that names the mode (for
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example <code>{name: "javascript", json: true}</code>). The demo
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pages for each mode contain information about what configuration
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parameters the mode supports. You can ask CodeMirror which modes
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and MIME types have been defined by inspecting
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the <code>CodeMirror.modes</code>
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and <code>CodeMirror.mimeModes</code> objects. The first maps
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mode names to their constructors, and the second maps MIME types
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to mode specs.</dd>
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<dt id="option_theme"><code><strong>theme</strong>: string</code></dt>
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<dd>The theme to style the editor with. You must make sure the
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CSS file defining the corresponding <code>.cm-s-[name]</code>
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styles is loaded (see
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the <a href="../theme/"><code>theme</code></a> directory in the
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distribution). The default is <code>"default"</code>, for which
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colors are included in <code>codemirror.css</code>. It is
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possible to use multiple theming classes at once—for
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example <code>"foo bar"</code> will assign both
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the <code>cm-s-foo</code> and the <code>cm-s-bar</code> classes
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to the editor.</dd>
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<dt id="option_indentUnit"><code><strong>indentUnit</strong>: integer</code></dt>
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<dd>How many spaces a block (whatever that means in the edited
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language) should be indented. The default is 2.</dd>
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<dt id="option_smartIndent"><code><strong>smartIndent</strong>: boolean</code></dt>
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<dd>Whether to use the context-sensitive indentation that the
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mode provides (or just indent the same as the line before).
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Defaults to true.</dd>
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<dt id="option_tabSize"><code><strong>tabSize</strong>: integer</code></dt>
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<dd>The width of a tab character. Defaults to 4.</dd>
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<dt id="option_indentWithTabs"><code><strong>indentWithTabs</strong>: boolean</code></dt>
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<dd>Whether, when indenting, the first N*<code>tabSize</code>
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spaces should be replaced by N tabs. Default is false.</dd>
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<dt id="option_electricChars"><code><strong>electricChars</strong>: boolean</code></dt>
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<dd>Configures whether the editor should re-indent the current
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line when a character is typed that might change its proper
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indentation (only works if the mode supports indentation).
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Default is true.</dd>
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<dt id="option_specialChars"><code><strong>specialChars</strong>: RegExp</code></dt>
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<dd>A regular expression used to determine which characters
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should be replaced by a
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special <a href="#option_specialCharPlaceholder">placeholder</a>.
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Mostly useful for non-printing special characters. The default
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is <code>/[\u0000-\u0019\u00ad\u200b\u2028\u2029\ufeff]/</code>.</dd>
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<dt id="option_specialCharPlaceholder"><code><strong>specialCharPlaceholder</strong>: function(char) → Element</code></dt>
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<dd>A function that, given a special character identified by
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the <a href="#option_specialChars"><code>specialChars</code></a>
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option, produces a DOM node that is used to represent the
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character. By default, a red dot (<span style="color: red">•</span>)
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is shown, with a title tooltip to indicate the character code.</dd>
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<dt id="option_rtlMoveVisually"><code><strong>rtlMoveVisually</strong>: boolean</code></dt>
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<dd>Determines whether horizontal cursor movement through
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right-to-left (Arabic, Hebrew) text is visual (pressing the left
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arrow moves the cursor left) or logical (pressing the left arrow
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moves to the next lower index in the string, which is visually
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right in right-to-left text). The default is <code>false</code>
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on Windows, and <code>true</code> on other platforms.</dd>
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<dt id="option_keyMap"><code><strong>keyMap</strong>: string</code></dt>
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<dd>Configures the key map to use. The default
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is <code>"default"</code>, which is the only key map defined
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in <code>codemirror.js</code> itself. Extra key maps are found in
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the <a href="../keymap/"><code>key map</code></a> directory. See
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the <a href="#keymaps">section on key maps</a> for more
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information.</dd>
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<dt id="option_extraKeys"><code><strong>extraKeys</strong>: object</code></dt>
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<dd>Can be used to specify extra key bindings for the editor,
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alongside the ones defined
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by <a href="#option_keyMap"><code>keyMap</code></a>. Should be
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either null, or a valid <a href="#keymaps">key map</a> value.</dd>
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<dt id="option_lineWrapping"><code><strong>lineWrapping</strong>: boolean</code></dt>
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<dd>Whether CodeMirror should scroll or wrap for long lines.
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Defaults to <code>false</code> (scroll).</dd>
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<dt id="option_lineNumbers"><code><strong>lineNumbers</strong>: boolean</code></dt>
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<dd>Whether to show line numbers to the left of the editor.</dd>
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<dt id="option_firstLineNumber"><code><strong>firstLineNumber</strong>: integer</code></dt>
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<dd>At which number to start counting lines. Default is 1.</dd>
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<dt id="option_lineNumberFormatter"><code><strong>lineNumberFormatter</strong>: function(line: integer) → string</code></dt>
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<dd>A function used to format line numbers. The function is
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passed the line number, and should return a string that will be
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shown in the gutter.</dd>
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<dt id="option_gutters"><code><strong>gutters</strong>: array<string></code></dt>
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<dd>Can be used to add extra gutters (beyond or instead of the
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line number gutter). Should be an array of CSS class names, each
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of which defines a <code>width</code> (and optionally a
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background), and which will be used to draw the background of
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the gutters. <em>May</em> include
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the <code>CodeMirror-linenumbers</code> class, in order to
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explicitly set the position of the line number gutter (it will
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default to be to the right of all other gutters). These class
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names are the keys passed
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to <a href="#setGutterMarker"><code>setGutterMarker</code></a>.</dd>
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<dt id="option_fixedGutter"><code><strong>fixedGutter</strong>: boolean</code></dt>
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<dd>Determines whether the gutter scrolls along with the content
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horizontally (false) or whether it stays fixed during horizontal
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scrolling (true, the default).</dd>
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<dt id="option_coverGutterNextToScrollbar"><code><strong>coverGutterNextToScrollbar</strong>: boolean</code></dt>
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<dd>When <a href="#option_fixedGutter"><code>fixedGutter</code></a>
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is on, and there is a horizontal scrollbar, by default the
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gutter will be visible to the left of this scrollbar. If this
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option is set to true, it will be covered by an element with
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class <code>CodeMirror-gutter-filler</code>.</dd>
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<dt id="option_readOnly"><code><strong>readOnly</strong>: boolean|string</code></dt>
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<dd>This disables editing of the editor content by the user. If
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the special value <code>"nocursor"</code> is given (instead of
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simply <code>true</code>), focusing of the editor is also
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disallowed.</dd>
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<dt id="option_showCursorWhenSelecting"><code><strong>showCursorWhenSelecting</strong>: boolean</code></dt>
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<dd>Whether the cursor should be drawn when a selection is
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active. Defaults to false.</dd>
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<dt id="option_undoDepth"><code><strong>undoDepth</strong>: integer</code></dt>
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<dd>The maximum number of undo levels that the editor stores.
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Note that this includes selection change events. Defaults to
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200.</dd>
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<dt id="option_historyEventDelay"><code><strong>historyEventDelay</strong>: integer</code></dt>
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<dd>The period of inactivity (in milliseconds) that will cause a
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new history event to be started when typing or deleting.
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Defaults to 1250.</dd>
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<dt id="option_tabindex"><code><strong>tabindex</strong>: integer</code></dt>
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<dd>The <a href="http://www.w3.org/TR/html401/interact/forms.html#adef-tabindex">tab
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index</a> to assign to the editor. If not given, no tab index
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will be assigned.</dd>
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<dt id="option_autofocus"><code><strong>autofocus</strong>: boolean</code></dt>
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<dd>Can be used to make CodeMirror focus itself on
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initialization. Defaults to off.
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When <a href="#fromTextArea"><code>fromTextArea</code></a> is
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used, and no explicit value is given for this option, it will be
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set to true when either the source textarea is focused, or it
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has an <code>autofocus</code> attribute and no other element is
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focused.</dd>
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</dl>
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<p>Below this a few more specialized, low-level options are
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listed. These are only useful in very specific situations, you
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might want to skip them the first time you read this manual.</p>
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<dl>
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<dt id="option_dragDrop"><code><strong>dragDrop</strong>: boolean</code></dt>
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<dd>Controls whether drag-and-drop is enabled. On by default.</dd>
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<dt id="option_cursorBlinkRate"><code><strong>cursorBlinkRate</strong>: number</code></dt>
|
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<dd>Half-period in milliseconds used for cursor blinking. The default blink
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rate is 530ms. By setting this to zero, blinking can be disabled. A
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negative value hides the cursor entirely.</dd>
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<dt id="option_cursorScrollMargin"><code><strong>cursorScrollMargin</strong>: number</code></dt>
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<dd>How much extra space to always keep above and below the
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cursor when approaching the top or bottom of the visible view in
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a scrollable document. Default is 0.</dd>
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<dt id="option_cursorHeight"><code><strong>cursorHeight</strong>: number</code></dt>
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<dd>Determines the height of the cursor. Default is 1, meaning
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it spans the whole height of the line. For some fonts (and by
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some tastes) a smaller height (for example <code>0.85</code>),
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which causes the cursor to not reach all the way to the bottom
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of the line, looks better</dd>
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<dt id="option_resetSelectionOnContextMenu"><code><strong>resetSelectionOnContextMenu</strong>: boolean</code></dt>
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<dd>Controls whether, when the context menu is opened with a
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click outside of the current selection, the cursor is moved to
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the point of the click. Defaults to <code>true</code>.</dd>
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<dt id="option_workTime"><code id="option_wordkDelay"><strong>workTime</strong>, <strong>workDelay</strong>: number</code></dt>
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<dd>Highlighting is done by a pseudo background-thread that will
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work for <code>workTime</code> milliseconds, and then use
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||
timeout to sleep for <code>workDelay</code> milliseconds. The
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defaults are 200 and 300, you can change these options to make
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the highlighting more or less aggressive.</dd>
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<dt id="option_pollInterval"><code><strong>pollInterval</strong>: number</code></dt>
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<dd>Indicates how quickly CodeMirror should poll its input
|
||
textarea for changes (when focused). Most input is captured by
|
||
events, but some things, like IME input on some browsers, don't
|
||
generate events that allow CodeMirror to properly detect it.
|
||
Thus, it polls. Default is 100 milliseconds.</dd>
|
||
|
||
<dt id="option_flattenSpans"><code><strong>flattenSpans</strong>: boolean</code></dt>
|
||
<dd>By default, CodeMirror will combine adjacent tokens into a
|
||
single span if they have the same class. This will result in a
|
||
simpler DOM tree, and thus perform better. With some kinds of
|
||
styling (such as rounded corners), this will change the way the
|
||
document looks. You can set this option to false to disable this
|
||
behavior.</dd>
|
||
|
||
<dt id="option_addModeClass"><code><strong>addModeClass</strong>: boolean</code></dt>
|
||
<dd>When enabled (off by default), an extra CSS class will be
|
||
added to each token, indicating the
|
||
(<a href="#innerMode">inner</a>) mode that produced it, prefixed
|
||
with <code>"cm-m-"</code>. For example, tokens from the XML mode
|
||
will get the <code>cm-m-xml</code> class.</dd>
|
||
|
||
<dt id="option_maxHighlightLength"><code><strong>maxHighlightLength</strong>: number</code></dt>
|
||
<dd>When highlighting long lines, in order to stay responsive,
|
||
the editor will give up and simply style the rest of the line as
|
||
plain text when it reaches a certain position. The default is
|
||
10 000. You can set this to <code>Infinity</code> to turn off
|
||
this behavior.</dd>
|
||
|
||
<dt id="option_crudeMeasuringFrom"><code><strong>crudeMeasuringFrom</strong>: number</code></dt>
|
||
<dd>When measuring the character positions in long lines, any
|
||
line longer than this number (default is 10 000),
|
||
when <a href="#option_lineWrapping">line wrapping</a>
|
||
is <strong>off</strong>, will simply be assumed to consist of
|
||
same-sized characters. This means that, on the one hand,
|
||
measuring will be inaccurate when characters of varying size,
|
||
right-to-left text, markers, or other irregular elements are
|
||
present. On the other hand, it means that having such a line
|
||
won't freeze the user interface because of the expensiveness of
|
||
the measurements.</dd>
|
||
|
||
<dt id="option_viewportMargin"><code><strong>viewportMargin</strong>: integer</code></dt>
|
||
<dd>Specifies the amount of lines that are rendered above and
|
||
below the part of the document that's currently scrolled into
|
||
view. This affects the amount of updates needed when scrolling,
|
||
and the amount of work that such an update does. You should
|
||
usually leave it at its default, 10. Can be set
|
||
to <code>Infinity</code> to make sure the whole document is
|
||
always rendered, and thus the browser's text search works on it.
|
||
This <em>will</em> have bad effects on performance of big
|
||
documents.</dd>
|
||
</dl>
|
||
</section>
|
||
|
||
<section id=events>
|
||
<h2>Events</h2>
|
||
|
||
<p>Various CodeMirror-related objects emit events, which allow
|
||
client code to react to various situations. Handlers for such
|
||
events can be registered with the <a href="#on"><code>on</code></a>
|
||
and <a href="#off"><code>off</code></a> methods on the objects
|
||
that the event fires on. To fire your own events,
|
||
use <code>CodeMirror.signal(target, name, args...)</code>,
|
||
where <code>target</code> is a non-DOM-node object.</p>
|
||
|
||
<p>An editor instance fires the following events.
|
||
The <code>instance</code> argument always refers to the editor
|
||
itself.</p>
|
||
|
||
<dl>
|
||
<dt id="event_change"><code><strong>"change"</strong> (instance: CodeMirror, changeObj: object)</code></dt>
|
||
<dd>Fires every time the content of the editor is changed.
|
||
The <code>changeObj</code> is a <code>{from, to, text, removed,
|
||
origin}</code> object containing information about the changes
|
||
that occurred as second argument. <code>from</code>
|
||
and <code>to</code> are the positions (in the pre-change
|
||
coordinate system) where the change started and ended (for
|
||
example, it might be <code>{ch:0, line:18}</code> if the
|
||
position is at the beginning of line #19). <code>text</code> is
|
||
an array of strings representing the text that replaced the
|
||
changed range (split by line). <code>removed</code> is the text
|
||
that used to be between <code>from</code> and <code>to</code>,
|
||
which is overwritten by this change.</dd>
|
||
|
||
<dt id="event_changes"><code><strong>"changes"</strong> (instance: CodeMirror, changes: array<object<)</code></dt>
|
||
<dd>Like the <a href="#event_change"><code>"change"</code></a>
|
||
event, but batched per <a href="#operation">operation</a>,
|
||
passing an array containing all the changes that happened in the
|
||
operation.</dd>
|
||
|
||
<dt id="event_beforeChange"><code><strong>"beforeChange"</strong> (instance: CodeMirror, changeObj: object)</code></dt>
|
||
<dd>This event is fired before a change is applied, and its
|
||
handler may choose to modify or cancel the change.
|
||
The <code>changeObj</code> object
|
||
has <code>from</code>, <code>to</code>, and <code>text</code>
|
||
properties, as with
|
||
the <a href="#event_change"><code>"change"</code></a> event. It
|
||
also has a <code>cancel()</code> method, which can be called to
|
||
cancel the change, and, <strong>if</strong> the change isn't
|
||
coming from an undo or redo event, an <code>update(from, to,
|
||
text)</code> method, which may be used to modify the change.
|
||
Undo or redo changes can't be modified, because they hold some
|
||
metainformation for restoring old marked ranges that is only
|
||
valid for that specific change. All three arguments
|
||
to <code>update</code> are optional, and can be left off to
|
||
leave the existing value for that field
|
||
intact. <strong>Note:</strong> you may not do anything from
|
||
a <code>"beforeChange"</code> handler that would cause changes
|
||
to the document or its visualization. Doing so will, since this
|
||
handler is called directly from the bowels of the CodeMirror
|
||
implementation, probably cause the editor to become
|
||
corrupted.</dd>
|
||
|
||
<dt id="event_cursorActivity"><code><strong>"cursorActivity"</strong> (instance: CodeMirror)</code></dt>
|
||
<dd>Will be fired when the cursor or selection moves, or any
|
||
change is made to the editor content.</dd>
|
||
|
||
<dt id="event_keyHandled"><code><strong>"keyHandled"</strong> (instance: CodeMirror, name: string, event: Event)</code></dt>
|
||
<dd>Fired after a key is handled through a
|
||
key map. <code>name</code> is the name of the handled key (for
|
||
example <code>"Ctrl-X"</code> or <code>"'q'"</code>),
|
||
and <code>event</code> is the DOM <code>keydown</code>
|
||
or <code>keypress</code> event.</dd>
|
||
|
||
<dt id="event_inputRead"><code><strong>"inputRead"</strong> (instance: CodeMirror, changeObj: object)</code></dt>
|
||
<dd>Fired whenever new input is read from the hidden textarea
|
||
(typed or pasted by the user).</dd>
|
||
|
||
<dt id="event_beforeSelectionChange"><code><strong>"beforeSelectionChange"</strong> (instance: CodeMirror, obj: {ranges, update})</code></dt>
|
||
<dd>This event is fired before the selection is moved. Its
|
||
handler may inspect the set of selection ranges, present as an
|
||
array of <code>{anchor, head}</code> objects in
|
||
the <code>ranges</code> property of the <code>obj</code>
|
||
argument, and optionally change them by calling
|
||
the <code>update</code> method on this object, passing an array
|
||
of ranges in the same format. Handlers for this event have the
|
||
same restriction
|
||
as <a href="#event_beforeChange"><code>"beforeChange"</code></a>
|
||
handlers — they should not do anything to directly update the
|
||
state of the editor.</dd>
|
||
|
||
<dt id="event_viewportChange"><code><strong>"viewportChange"</strong> (instance: CodeMirror, from: number, to: number)</code></dt>
|
||
<dd>Fires whenever the <a href="#getViewport">view port</a> of
|
||
the editor changes (due to scrolling, editing, or any other
|
||
factor). The <code>from</code> and <code>to</code> arguments
|
||
give the new start and end of the viewport.</dd>
|
||
|
||
<dt id="event_swapDoc"><code><strong>"swapDoc"</strong> (instance: CodeMirror, oldDoc: Doc)</code></dt>
|
||
<dd>This is signalled when the editor's document is replaced
|
||
using the <a href="#swapDoc"><code>swapDoc</code></a>
|
||
method.</dd>
|
||
|
||
<dt id="event_gutterClick"><code><strong>"gutterClick"</strong> (instance: CodeMirror, line: integer, gutter: string, clickEvent: Event)</code></dt>
|
||
<dd>Fires when the editor gutter (the line-number area) is
|
||
clicked. Will pass the editor instance as first argument, the
|
||
(zero-based) number of the line that was clicked as second
|
||
argument, the CSS class of the gutter that was clicked as third
|
||
argument, and the raw <code>mousedown</code> event object as
|
||
fourth argument.</dd>
|
||
|
||
<dt id="event_gutterContextMenu"><code><strong>"gutterContextMenu"</strong> (instance: CodeMirror, line: integer, gutter: string, contextMenu: Event: Event)</code></dt>
|
||
<dd>Fires when the editor gutter (the line-number area)
|
||
receives a <code>contextmenu</code> event. Will pass the editor
|
||
instance as first argument, the (zero-based) number of the line
|
||
that was clicked as second argument, the CSS class of the
|
||
gutter that was clicked as third argument, and the raw
|
||
<code>contextmenu</code> mouse event object as fourth argument.
|
||
You can <code>preventDefault</code> the event, to signal that
|
||
CodeMirror should do no further handling.</dd>
|
||
|
||
<dt id="event_focus"><code><strong>"focus"</strong> (instance: CodeMirror)</code></dt>
|
||
<dd>Fires whenever the editor is focused.</dd>
|
||
|
||
<dt id="event_blur"><code><strong>"blur"</strong> (instance: CodeMirror)</code></dt>
|
||
<dd>Fires whenever the editor is unfocused.</dd>
|
||
|
||
<dt id="event_scroll"><code><strong>"scroll"</strong> (instance: CodeMirror)</code></dt>
|
||
<dd>Fires when the editor is scrolled.</dd>
|
||
|
||
<dt id="event_update"><code><strong>"update"</strong> (instance: CodeMirror)</code></dt>
|
||
<dd>Will be fired whenever CodeMirror updates its DOM display.</dd>
|
||
|
||
<dt id="event_renderLine"><code><strong>"renderLine"</strong> (instance: CodeMirror, line: LineHandle, element: Element)</code></dt>
|
||
<dd>Fired whenever a line is (re-)rendered to the DOM. Fired
|
||
right after the DOM element is built, <em>before</em> it is
|
||
added to the document. The handler may mess with the style of
|
||
the resulting element, or add event handlers, but
|
||
should <em>not</em> try to change the state of the editor.</dd>
|
||
|
||
<dt id="event_dom"><code><strong>"mousedown"</strong>,
|
||
<strong>"dblclick"</strong>, <strong>"contextmenu"</strong>, <strong>"keydown"</strong>, <strong>"keypress"</strong>,
|
||
<strong>"keyup"</strong>, <strong>"dragstart"</strong>, <strong>"dragenter"</strong>,
|
||
<strong>"dragover"</strong>, <strong>"drop"</strong>
|
||
(instance: CodeMirror, event: Event)</code></dt>
|
||
<dd>Fired when CodeMirror is handling a DOM event of this type.
|
||
You can <code>preventDefault</code> the event, or give it a
|
||
truthy <code>codemirrorIgnore</code> property, to signal that
|
||
CodeMirror should do no further handling.</dd>
|
||
</dl>
|
||
|
||
<p>Document objects (instances
|
||
of <a href="#Doc"><code>CodeMirror.Doc</code></a>) emit the
|
||
following events:</p>
|
||
|
||
<dl>
|
||
<dt id="event_doc_change"><code><strong>"change"</strong> (doc: CodeMirror.Doc, changeObj: object)</code></dt>
|
||
<dd>Fired whenever a change occurs to the
|
||
document. <code>changeObj</code> has a similar type as the
|
||
object passed to the
|
||
editor's <a href="#event_change"><code>"change"</code></a>
|
||
event.</dd>
|
||
|
||
<dt id="event_doc_beforeChange"><code><strong>"beforeChange"</strong> (doc: CodeMirror.Doc, change: object)</code></dt>
|
||
<dd>See the <a href="#event_beforeChange">description of the
|
||
same event</a> on editor instances.</dd>
|
||
|
||
<dt id="event_doc_cursorActivity"><code><strong>"cursorActivity"</strong> (doc: CodeMirror.Doc)</code></dt>
|
||
<dd>Fired whenever the cursor or selection in this document
|
||
changes.</dd>
|
||
|
||
<dt id="event_doc_beforeSelectionChange"><code><strong>"beforeSelectionChange"</strong> (doc: CodeMirror.Doc, selection: {head, anchor})</code></dt>
|
||
<dd>Equivalent to
|
||
the <a href="#event_beforeSelectionChange">event by the same
|
||
name</a> as fired on editor instances.</dd>
|
||
</dl>
|
||
|
||
<p>Line handles (as returned by, for
|
||
example, <a href="#getLineHandle"><code>getLineHandle</code></a>)
|
||
support these events:</p>
|
||
|
||
<dl>
|
||
<dt id="event_delete"><code><strong>"delete"</strong> ()</code></dt>
|
||
<dd>Will be fired when the line object is deleted. A line object
|
||
is associated with the <em>start</em> of the line. Mostly useful
|
||
when you need to find out when your <a href="#setGutterMarker">gutter
|
||
markers</a> on a given line are removed.</dd>
|
||
<dt id="event_line_change"><code><strong>"change"</strong> (line: LineHandle, changeObj: object)</code></dt>
|
||
<dd>Fires when the line's text content is changed in any way
|
||
(but the line is not deleted outright). The <code>change</code>
|
||
object is similar to the one passed
|
||
to <a href="#event_change">change event</a> on the editor
|
||
object.</dd>
|
||
</dl>
|
||
|
||
<p>Marked range handles (<code>CodeMirror.TextMarker</code>), as returned
|
||
by <a href="#markText"><code>markText</code></a>
|
||
and <a href="#setBookmark"><code>setBookmark</code></a>, emit the
|
||
following events:</p>
|
||
|
||
<dl>
|
||
<dt id="event_beforeCursorEnter"><code><strong>"beforeCursorEnter"</strong> ()</code></dt>
|
||
<dd>Fired when the cursor enters the marked range. From this
|
||
event handler, the editor state may be inspected
|
||
but <em>not</em> modified, with the exception that the range on
|
||
which the event fires may be cleared.</dd>
|
||
<dt id="event_clear"><code><strong>"clear"</strong> (from: {line, ch}, to: {line, ch})</code></dt>
|
||
<dd>Fired when the range is cleared, either through cursor
|
||
movement in combination
|
||
with <a href="#mark_clearOnEnter"><code>clearOnEnter</code></a>
|
||
or through a call to its <code>clear()</code> method. Will only
|
||
be fired once per handle. Note that deleting the range through
|
||
text editing does not fire this event, because an undo action
|
||
might bring the range back into existence. <code>from</code>
|
||
and <code>to</code> give the part of the document that the range
|
||
spanned when it was cleared.</dd>
|
||
<dt id="event_hide"><code><strong>"hide"</strong> ()</code></dt>
|
||
<dd>Fired when the last part of the marker is removed from the
|
||
document by editing operations.</dd>
|
||
<dt id="event_unhide"><code><strong>"unhide"</strong> ()</code></dt>
|
||
<dd>Fired when, after the marker was removed by editing, a undo
|
||
operation brought the marker back.</dd>
|
||
</dl>
|
||
|
||
<p>Line widgets (<code>CodeMirror.LineWidget</code>), returned
|
||
by <a href="#addLineWidget"><code>addLineWidget</code></a>, fire
|
||
these events:</p>
|
||
|
||
<dl>
|
||
<dt id="event_redraw"><code><strong>"redraw"</strong> ()</code></dt>
|
||
<dd>Fired whenever the editor re-adds the widget to the DOM.
|
||
This will happen once right after the widget is added (if it is
|
||
scrolled into view), and then again whenever it is scrolled out
|
||
of view and back in again, or when changes to the editor options
|
||
or the line the widget is on require the widget to be
|
||
redrawn.</dd>
|
||
</dl>
|
||
</section>
|
||
|
||
<section id=keymaps>
|
||
<h2>Key Maps</h2>
|
||
|
||
<p>Key maps are ways to associate keys with functionality. A key map
|
||
is an object mapping strings that identify the keys to functions
|
||
that implement their functionality.</p>
|
||
|
||
<p>The CodeMirror distributions comes
|
||
with <a href="../demo/emacs.html">Emacs</a>, <a href="../demo/vim.html">Vim</a>,
|
||
and <a href="../demo/sublime.html">Sublime Text</a>-style keymaps.</p>
|
||
|
||
<p>Keys are identified either by name or by character.
|
||
The <code>CodeMirror.keyNames</code> object defines names for
|
||
common keys and associates them with their key codes. Examples of
|
||
names defined here are <code>Enter</code>, <code>F5</code>,
|
||
and <code>Q</code>. These can be prefixed
|
||
with <code>Shift-</code>, <code>Cmd-</code>, <code>Ctrl-</code>,
|
||
and <code>Alt-</code> (in that order!) to specify a modifier. So
|
||
for example, <code>Shift-Ctrl-Space</code> would be a valid key
|
||
identifier.</p>
|
||
|
||
<p>Common example: map the Tab key to insert spaces instead of a tab
|
||
character.</p>
|
||
|
||
<pre data-lang="javascript">
|
||
{
|
||
Tab: function(cm) {
|
||
var spaces = Array(cm.getOption("indentUnit") + 1).join(" ");
|
||
cm.replaceSelection(spaces);
|
||
}
|
||
}</pre>
|
||
|
||
<p>Alternatively, a character can be specified directly by
|
||
surrounding it in single quotes, for example <code>'$'</code>
|
||
or <code>'q'</code>. Due to limitations in the way browsers fire
|
||
key events, these may not be prefixed with modifiers.</p>
|
||
|
||
<p>The <code>CodeMirror.keyMap</code> object associates key maps
|
||
with names. User code and key map definitions can assign extra
|
||
properties to this object. Anywhere where a key map is expected, a
|
||
string can be given, which will be looked up in this object. It
|
||
also contains the <code>"default"</code> key map holding the
|
||
default bindings.</p>
|
||
|
||
<p>The values of properties in key maps can be either functions of
|
||
a single argument (the CodeMirror instance), strings, or
|
||
<code>false</code>. Strings refer
|
||
to <a href="#commands">commands</a>, which are described below. If
|
||
the property is set to <code>false</code>, CodeMirror leaves
|
||
handling of the key up to the browser. A key handler function may
|
||
return <code>CodeMirror.Pass</code> to indicate that it has
|
||
decided not to handle the key, and other handlers (or the default
|
||
behavior) should be given a turn.</p>
|
||
|
||
<p>Keys mapped to command names that start with the
|
||
characters <code>"go"</code> (which should be used for
|
||
cursor-movement actions) will be fired even when an
|
||
extra <code>Shift</code> modifier is present (i.e. <code>"Up":
|
||
"goLineUp"</code> matches both up and shift-up). This is used to
|
||
easily implement shift-selection.</p>
|
||
|
||
<p>Key maps can defer to each other by defining
|
||
a <code>fallthrough</code> property. This indicates that when a
|
||
key is not found in the map itself, one or more other maps should
|
||
be searched. It can hold either a single key map or an array of
|
||
key maps.</p>
|
||
|
||
<p>When a key map contains a <code>nofallthrough</code> property
|
||
set to <code>true</code>, keys matched against that map will be
|
||
ignored if they don't match any of the bindings in the map (no
|
||
further child maps will be tried). When
|
||
the <code>disableInput</code> property is set
|
||
to <code>true</code>, the default effect of inserting a character
|
||
will be suppressed when the key map is active as the top-level
|
||
map.</p>
|
||
</section>
|
||
|
||
<section id=commands>
|
||
<h2>Commands</h2>
|
||
|
||
<p>Commands are parameter-less actions that can be performed on an
|
||
editor. Their main use is for key bindings. Commands are defined by
|
||
adding properties to the <code>CodeMirror.commands</code> object.
|
||
A number of common commands are defined by the library itself,
|
||
most of them used by the default key bindings. The value of a
|
||
command property must be a function of one argument (an editor
|
||
instance).</p>
|
||
|
||
<p>Some of the commands below are referenced in the default
|
||
key map, but not defined by the core library. These are intended to
|
||
be defined by user code or addons.</p>
|
||
|
||
<p>Commands can also be run with
|
||
the <a href="#execCommand"><code>execCommand</code></a>
|
||
method.</p>
|
||
|
||
<dl>
|
||
<dt class=command id=command_selectAll><code><strong>selectAll</strong></code><span class=keybinding>Ctrl-A (PC), Cmd-A (Mac)</span></dt>
|
||
<dd>Select the whole content of the editor.</dd>
|
||
|
||
<dt class=command id=command_singleSelection><code><strong>singleSelection</strong></code><span class=keybinding>Esc</span></dt>
|
||
<dd>When multiple selections are present, this deselects all but
|
||
the primary selection.</dd>
|
||
|
||
<dt class=command id=command_killLine><code><strong>killLine</strong></code><span class=keybinding>Ctrl-K (Mac)</span></dt>
|
||
<dd>Emacs-style line killing. Deletes the part of the line after
|
||
the cursor. If that consists only of whitespace, the newline at
|
||
the end of the line is also deleted.</dd>
|
||
|
||
<dt class=command id=command_deleteLine><code><strong>deleteLine</strong></code><span class=keybinding>Ctrl-D (PC), Cmd-D (Mac)</span></dt>
|
||
<dd>Deletes the whole line under the cursor, including newline at the end.</dd>
|
||
|
||
<dt class=command id=command_delLineLeft><code><strong>delLineLeft</strong></code></dt>
|
||
<dd>Delete the part of the line before the cursor.</dd>
|
||
|
||
<dt class=command id=command_delWrappedLineLeft><code><strong>delWrappedLineLeft</strong></code><span class=keybinding>Cmd-Backspace (Mac)</span></dt>
|
||
<dd>Delete the part of the line from the left side of the visual line the cursor is on to the cursor.</dd>
|
||
|
||
<dt class=command id=command_delWrappedLineRight><code><strong>delWrappedLineRight</strong></code><span class=keybinding>Cmd-Delete (Mac)</span></dt>
|
||
<dd>Delete the part of the line from the cursor to the right side of the visual line the cursor is on.</dd>
|
||
|
||
<dt class=command id=command_undo><code><strong>undo</strong></code><span class=keybinding>Ctrl-Z (PC), Cmd-Z (Mac)</span></dt>
|
||
<dd>Undo the last change.</dd>
|
||
|
||
<dt class=command id=command_redo><code><strong>redo</strong></code><span class=keybinding>Ctrl-Y (PC), Shift-Cmd-Z (Mac), Cmd-Y (Mac)</span></dt>
|
||
<dd>Redo the last undone change.</dd>
|
||
|
||
<dt class=command id=command_undoSelection><code><strong>undoSelection</strong></code><span class=keybinding>Ctrl-U (PC), Cmd-U (Mac)</span></dt>
|
||
<dd>Undo the last change to the selection, or if there are no
|
||
selection-only changes at the top of the history, undo the last
|
||
change.</dd>
|
||
|
||
<dt class=command id=command_redoSelection><code><strong>redoSelection</strong></code><span class=keybinding>Alt-U (PC), Shift-Cmd-U (Mac)</span></dt>
|
||
<dd>Redo the last change to the selection, or the last text change if
|
||
no selection changes remain.</dd>
|
||
|
||
<dt class=command id=command_goDocStart><code><strong>goDocStart</strong></code><span class=keybinding>Ctrl-Up (PC), Cmd-Up (Mac), Cmd-Home (Mac)</span></dt>
|
||
<dd>Move the cursor to the start of the document.</dd>
|
||
|
||
<dt class=command id=command_goDocEnd><code><strong>goDocEnd</strong></code><span class=keybinding>Ctrl-Down (PC), Cmd-End (Mac), Cmd-Down (Mac)</span></dt>
|
||
<dd>Move the cursor to the end of the document.</dd>
|
||
|
||
<dt class=command id=command_goLineStart><code><strong>goLineStart</strong></code><span class=keybinding>Alt-Left (PC), Ctrl-A (Mac)</span></dt>
|
||
<dd>Move the cursor to the start of the line.</dd>
|
||
|
||
<dt class=command id=command_goLineStartSmart><code><strong>goLineStartSmart</strong></code><span class=keybinding>Home</span></dt>
|
||
<dd>Move to the start of the text on the line, or if we are
|
||
already there, to the actual start of the line (including
|
||
whitespace).</dd>
|
||
|
||
<dt class=command id=command_goLineEnd><code><strong>goLineEnd</strong></code><span class=keybinding>Alt-Right (PC), Ctrl-E (Mac)</span></dt>
|
||
<dd>Move the cursor to the end of the line.</dd>
|
||
|
||
<dt class=command id=command_goLineRight><code><strong>goLineRight</strong></code><span class=keybinding>Cmd-Right (Mac)</span></dt>
|
||
<dd>Move the cursor to the right side of the visual line it is on.</dd>
|
||
|
||
<dt class=command id=command_goLineLeft><code><strong>goLineLeft</strong></code><span class=keybinding>Cmd-Left (Mac)</span></dt>
|
||
<dd>Move the cursor to the left side of the visual line it is on. If
|
||
this line is wrapped, that may not be the start of the line.</dd>
|
||
|
||
<dt class=command id=command_goLineLeftSmart><code><strong>goLineLeftSmart</strong></code></dt>
|
||
<dd>Move the cursor to the left side of the visual line it is
|
||
on. If that takes it to the start of the line, behave
|
||
like <a href="#command_goLineStartSmart"><code>goLineStartSmart</code></a>.</dd>
|
||
|
||
<dt class=command id=command_goLineUp><code><strong>goLineUp</strong></code><span class=keybinding>Up, Ctrl-P (Mac)</span></dt>
|
||
<dd>Move the cursor up one line.</dd>
|
||
|
||
<dt class=command id=command_goLineDown><code><strong>goLineDown</strong></code><span class=keybinding>Down, Ctrl-N (Mac)</span></dt>
|
||
<dd>Move down one line.</dd>
|
||
|
||
<dt class=command id=command_goPageUp><code><strong>goPageUp</strong></code><span class=keybinding>PageUp, Shift-Ctrl-V (Mac)</span></dt>
|
||
<dd>Move the cursor up one screen, and scroll up by the same distance.</dd>
|
||
|
||
<dt class=command id=command_goPageDown><code><strong>goPageDown</strong></code><span class=keybinding>PageDown, Ctrl-V (Mac)</span></dt>
|
||
<dd>Move the cursor down one screen, and scroll down by the same distance.</dd>
|
||
|
||
<dt class=command id=command_goCharLeft><code><strong>goCharLeft</strong></code><span class=keybinding>Left, Ctrl-B (Mac)</span></dt>
|
||
<dd>Move the cursor one character left, going to the previous line
|
||
when hitting the start of line.</dd>
|
||
|
||
<dt class=command id=command_goCharRight><code><strong>goCharRight</strong></code><span class=keybinding>Right, Ctrl-F (Mac)</span></dt>
|
||
<dd>Move the cursor one character right, going to the next line
|
||
when hitting the end of line.</dd>
|
||
|
||
<dt class=command id=command_goColumnLeft><code><strong>goColumnLeft</strong></code></dt>
|
||
<dd>Move the cursor one character left, but don't cross line boundaries.</dd>
|
||
|
||
<dt class=command id=command_goColumnRight><code><strong>goColumnRight</strong></code></dt>
|
||
<dd>Move the cursor one character right, don't cross line boundaries.</dd>
|
||
|
||
<dt class=command id=command_goWordLeft><code><strong>goWordLeft</strong></code><span class=keybinding>Alt-B (Mac)</span></dt>
|
||
<dd>Move the cursor to the start of the previous word.</dd>
|
||
|
||
<dt class=command id=command_goWordRight><code><strong>goWordRight</strong></code><span class=keybinding>Alt-F (Mac)</span></dt>
|
||
<dd>Move the cursor to the end of the next word.</dd>
|
||
|
||
<dt class=command id=command_goGroupLeft><code><strong>goGroupLeft</strong></code><span class=keybinding>Ctrl-Left (PC), Alt-Left (Mac)</span></dt>
|
||
<dd>Move to the left of the group before the cursor. A group is
|
||
a stretch of word characters, a stretch of punctuation
|
||
characters, a newline, or a stretch of <em>more than one</em>
|
||
whitespace character.</dd>
|
||
|
||
<dt class=command id=command_goGroupRight><code><strong>goGroupRight</strong></code><span class=keybinding>Ctrl-Right (PC), Alt-Right (Mac)</span></dt>
|
||
<dd>Move to the right of the group after the cursor
|
||
(see <a href="#command_goGroupLeft">above</a>).</dd>
|
||
|
||
<dt class=command id=command_delCharBefore><code><strong>delCharBefore</strong></code><span class=keybinding>Shift-Backspace, Ctrl-H (Mac)</span></dt>
|
||
<dd>Delete the character before the cursor.</dd>
|
||
|
||
<dt class=command id=command_delCharAfter><code><strong>delCharAfter</strong></code><span class=keybinding>Delete, Ctrl-D (Mac)</span></dt>
|
||
<dd>Delete the character after the cursor.</dd>
|
||
|
||
<dt class=command id=command_delWordBefore><code><strong>delWordBefore</strong></code><span class=keybinding>Alt-Backspace (Mac)</span></dt>
|
||
<dd>Delete up to the start of the word before the cursor.</dd>
|
||
|
||
<dt class=command id=command_delWordAfter><code><strong>delWordAfter</strong></code><span class=keybinding>Alt-D (Mac)</span></dt>
|
||
<dd>Delete up to the end of the word after the cursor.</dd>
|
||
|
||
<dt class=command id=command_delGroupBefore><code><strong>delGroupBefore</strong></code><span class=keybinding>Ctrl-Backspace (PC), Alt-Backspace (Mac)</span></dt>
|
||
<dd>Delete to the left of the <a href="#command_goGroupLeft">group</a> before the cursor.</dd>
|
||
|
||
<dt class=command id=command_delGroupAfter><code><strong>delGroupAfter</strong></code><span class=keybinding>Ctrl-Delete (PC), Ctrl-Alt-Backspace (Mac), Alt-Delete (Mac)</span></dt>
|
||
<dd>Delete to the start of the <a href="#command_goGroupLeft">group</a> after the cursor.</dd>
|
||
|
||
<dt class=command id=command_indentAuto><code><strong>indentAuto</strong></code><span class=keybinding>Shift-Tab</span></dt>
|
||
<dd>Auto-indent the current line or selection.</dd>
|
||
|
||
<dt class=command id=command_indentMore><code><strong>indentMore</strong></code><span class=keybinding>Ctrl-] (PC), Cmd-] (Mac)</span></dt>
|
||
<dd>Indent the current line or selection by one <a href="#option_indentUnit">indent unit</a>.</dd>
|
||
|
||
<dt class=command id=command_indentLess><code><strong>indentLess</strong></code><span class=keybinding>Ctrl-[ (PC), Cmd-[ (Mac)</span></dt>
|
||
<dd>Dedent the current line or selection by one <a href="#option_indentUnit">indent unit</a>.</dd>
|
||
|
||
<dt class=command id=command_insertTab><code><strong>insertTab</strong></code></dt>
|
||
<dd>Insert a tab character at the cursor.</dd>
|
||
|
||
<dt class=command id=command_insertSoftTab><code><strong>insertSoftTab</strong></code></dt>
|
||
<dd>Insert the amount of spaces that match the width a tab at
|
||
the cursor position would have.</dd>
|
||
|
||
<dt class=command id=command_defaultTab><code><strong>defaultTab</strong></code><span class=keybinding>Tab</span></dt>
|
||
<dd>If something is selected, indent it by
|
||
one <a href="#option_indentUnit">indent unit</a>. If nothing is
|
||
selected, insert a tab character.</dd>
|
||
|
||
<dt class=command id=command_transposeChars><code><strong>transposeChars</strong></code><span class=keybinding>Ctrl-T (Mac)</span></dt>
|
||
<dd>Swap the characters before and after the cursor.</dd>
|
||
|
||
<dt class=command id=command_newlineAndIndent><code><strong>newlineAndIndent</strong></code><span class=keybinding>Enter</span></dt>
|
||
<dd>Insert a newline and auto-indent the new line.</dd>
|
||
|
||
<dt class=command id=command_toggleOverwrite><code><strong>toggleOverwrite</strong></code><span class=keybinding>Insert</span></dt>
|
||
<dd>Flip the <a href="#toggleOverwrite">overwrite</a> flag.</dd>
|
||
|
||
<dt class=command id=command_save><code><strong>save</strong></code><span class=keybinding>Ctrl-S (PC), Cmd-S (Mac)</span></dt>
|
||
<dd>Not defined by the core library, only referred to in
|
||
key maps. Intended to provide an easy way for user code to define
|
||
a save command.</dd>
|
||
|
||
<dt class=command id=command_find><code><strong>find</strong></code><span class=keybinding>Ctrl-F (PC), Cmd-F (Mac)</span></dt>
|
||
<dt class=command id=command_findNext><code><strong>findNext</strong></code><span class=keybinding>Ctrl-G (PC), Cmd-G (Mac)</span></dt>
|
||
<dt class=command id=command_findPrev><code><strong>findPrev</strong></code><span class=keybinding>Shift-Ctrl-G (PC), Shift-Cmd-G (Mac)</span></dt>
|
||
<dt class=command id=command_replace><code><strong>replace</strong></code><span class=keybinding>Shift-Ctrl-F (PC), Cmd-Alt-F (Mac)</span></dt>
|
||
<dt class=command id=command_replaceAll><code><strong>replaceAll</strong></code><span class=keybinding>Shift-Ctrl-R (PC), Shift-Cmd-Alt-F (Mac)</span></dt>
|
||
<dd>Not defined by the core library, but defined in
|
||
the <a href="#addon_search">search addon</a> (or custom client
|
||
addons).</dd>
|
||
|
||
</dl>
|
||
|
||
</section>
|
||
|
||
<section id=styling>
|
||
<h2>Customized Styling</h2>
|
||
|
||
<p>Up to a certain extent, CodeMirror's look can be changed by
|
||
modifying style sheet files. The style sheets supplied by modes
|
||
simply provide the colors for that mode, and can be adapted in a
|
||
very straightforward way. To style the editor itself, it is
|
||
possible to alter or override the styles defined
|
||
in <a href="../lib/codemirror.css"><code>codemirror.css</code></a>.</p>
|
||
|
||
<p>Some care must be taken there, since a lot of the rules in this
|
||
file are necessary to have CodeMirror function properly. Adjusting
|
||
colors should be safe, of course, and with some care a lot of
|
||
other things can be changed as well. The CSS classes defined in
|
||
this file serve the following roles:</p>
|
||
|
||
<dl>
|
||
<dt id="class_CodeMirror"><code><strong>CodeMirror</strong></code></dt>
|
||
<dd>The outer element of the editor. This should be used for the
|
||
editor width, height, borders and positioning. Can also be used
|
||
to set styles that should hold for everything inside the editor
|
||
(such as font and font size), or to set a background.</dd>
|
||
|
||
<dt id="class_CodeMirror_scroll"><code><strong>CodeMirror-scroll</strong></code></dt>
|
||
<dd>Whether the editor scrolls (<code>overflow: auto</code> +
|
||
fixed height). By default, it does. Setting
|
||
the <code>CodeMirror</code> class to have <code>height:
|
||
auto</code> and giving this class <code>overflow-x: auto;
|
||
overflow-y: hidden;</code> will cause the editor
|
||
to <a href="../demo/resize.html">resize to fit its
|
||
content</a>.</dd>
|
||
|
||
<dt id="class_CodeMirror_focused"><code><strong>CodeMirror-focused</strong></code></dt>
|
||
<dd>Whenever the editor is focused, the top element gets this
|
||
class. This is used to hide the cursor and give the selection a
|
||
different color when the editor is not focused.</dd>
|
||
|
||
<dt id="class_CodeMirror_gutters"><code><strong>CodeMirror-gutters</strong></code></dt>
|
||
<dd>This is the backdrop for all gutters. Use it to set the
|
||
default gutter background color, and optionally add a border on
|
||
the right of the gutters.</dd>
|
||
|
||
<dt id="class_CodeMirror_linenumbers"><code><strong>CodeMirror-linenumbers</strong></code></dt>
|
||
<dd>Use this for giving a background or width to the line number
|
||
gutter.</dd>
|
||
|
||
<dt id="class_CodeMirror_linenumber"><code><strong>CodeMirror-linenumber</strong></code></dt>
|
||
<dd>Used to style the actual individual line numbers. These
|
||
won't be children of the <code>CodeMirror-linenumbers</code>
|
||
(plural) element, but rather will be absolutely positioned to
|
||
overlay it. Use this to set alignment and text properties for
|
||
the line numbers.</dd>
|
||
|
||
<dt id="class_CodeMirror_lines"><code><strong>CodeMirror-lines</strong></code></dt>
|
||
<dd>The visible lines. This is where you specify vertical
|
||
padding for the editor content.</dd>
|
||
|
||
<dt id="class_CodeMirror_cursor"><code><strong>CodeMirror-cursor</strong></code></dt>
|
||
<dd>The cursor is a block element that is absolutely positioned.
|
||
You can make it look whichever way you want.</dd>
|
||
|
||
<dt id="class_CodeMirror_selected"><code><strong>CodeMirror-selected</strong></code></dt>
|
||
<dd>The selection is represented by <code>span</code> elements
|
||
with this class.</dd>
|
||
|
||
<dt id="class_CodeMirror_matchingbracket"><code><strong>CodeMirror-matchingbracket</strong></code>,
|
||
<code><strong>CodeMirror-nonmatchingbracket</strong></code></dt>
|
||
<dd>These are used to style matched (or unmatched) brackets.</dd>
|
||
</dl>
|
||
|
||
<p>If your page's style sheets do funky things to
|
||
all <code>div</code> or <code>pre</code> elements (you probably
|
||
shouldn't do that), you'll have to define rules to cancel these
|
||
effects out again for elements under the <code>CodeMirror</code>
|
||
class.</p>
|
||
|
||
<p>Themes are also simply CSS files, which define colors for
|
||
various syntactic elements. See the files in
|
||
the <a href="../theme/"><code>theme</code></a> directory.</p>
|
||
</section>
|
||
|
||
<section id=api>
|
||
<h2>Programming API</h2>
|
||
|
||
<p>A lot of CodeMirror features are only available through its
|
||
API. Thus, you need to write code (or
|
||
use <a href="#addons">addons</a>) if you want to expose them to
|
||
your users.</p>
|
||
|
||
<p>Whenever points in the document are represented, the API uses
|
||
objects with <code>line</code> and <code>ch</code> properties.
|
||
Both are zero-based. CodeMirror makes sure to 'clip' any positions
|
||
passed by client code so that they fit inside the document, so you
|
||
shouldn't worry too much about sanitizing your coordinates. If you
|
||
give <code>ch</code> a value of <code>null</code>, or don't
|
||
specify it, it will be replaced with the length of the specified
|
||
line.</p>
|
||
|
||
<p>Methods prefixed with <code>doc.</code> can, unless otherwise
|
||
specified, be called both on <code>CodeMirror</code> (editor)
|
||
instances and <code>CodeMirror.Doc</code> instances. Methods
|
||
prefixed with <code>cm.</code> are <em>only</em> available
|
||
on <code>CodeMirror</code> instances.</p>
|
||
|
||
<h3 id="api_constructor">Constructor</h3>
|
||
|
||
<p id="CodeMirror">Constructing an editor instance is done with
|
||
the <code><strong>CodeMirror</strong>(place: Element|fn(Element),
|
||
?option: object)</code> constructor. If the <code>place</code>
|
||
argument is a DOM element, the editor will be appended to it. If
|
||
it is a function, it will be called, and is expected to place the
|
||
editor into the document. <code>options</code> may be an element
|
||
mapping <a href="#config">option names</a> to values. The options
|
||
that it doesn't explicitly specify (or all options, if it is not
|
||
passed) will be taken
|
||
from <a href="#defaults"><code>CodeMirror.defaults</code></a>.</p>
|
||
|
||
<p>Note that the options object passed to the constructor will be
|
||
mutated when the instance's options
|
||
are <a href="#setOption">changed</a>, so you shouldn't share such
|
||
objects between instances.</p>
|
||
|
||
<p>See <a href="#fromTextArea"><code>CodeMirror.fromTextArea</code></a>
|
||
for another way to construct an editor instance.</p>
|
||
|
||
<h3 id="api_content">Content manipulation methods</h3>
|
||
|
||
<dl>
|
||
<dt id="getValue"><code><strong>doc.getValue</strong>(?separator: string) → string</code></dt>
|
||
<dd>Get the current editor content. You can pass it an optional
|
||
argument to specify the string to be used to separate lines
|
||
(defaults to <code>"\n"</code>).</dd>
|
||
<dt id="setValue"><code><strong>doc.setValue</strong>(content: string)</code></dt>
|
||
<dd>Set the editor content.</dd>
|
||
|
||
<dt id="getRange"><code><strong>doc.getRange</strong>(from: {line, ch}, to: {line, ch}, ?separator: string) → string</code></dt>
|
||
<dd>Get the text between the given points in the editor, which
|
||
should be <code>{line, ch}</code> objects. An optional third
|
||
argument can be given to indicate the line separator string to
|
||
use (defaults to <code>"\n"</code>).</dd>
|
||
<dt id="replaceRange"><code><strong>doc.replaceRange</strong>(replacement: string, from: {line, ch}, to: {line, ch}, ?origin: string)</code></dt>
|
||
<dd>Replace the part of the document between <code>from</code>
|
||
and <code>to</code> with the given string. <code>from</code>
|
||
and <code>to</code> must be <code>{line, ch}</code>
|
||
objects. <code>to</code> can be left off to simply insert the
|
||
string at position <code>from</code>. When <code>origin</code>
|
||
is given, it will be passed on
|
||
to <a href="#event_change"><code>"change"</code> events</a>, and
|
||
its first letter will be used to determine whether this change
|
||
can be merged with previous history events, in the way described
|
||
for <a href="#selection_origin">selection origins</a>.</dd>
|
||
|
||
<dt id="getLine"><code><strong>doc.getLine</strong>(n: integer) → string</code></dt>
|
||
<dd>Get the content of line <code>n</code>.</dd>
|
||
|
||
<dt id="lineCount"><code><strong>doc.lineCount</strong>() → integer</code></dt>
|
||
<dd>Get the number of lines in the editor.</dd>
|
||
<dt id="firstLine"><code><strong>doc.firstLine</strong>() → integer</code></dt>
|
||
<dd>Get the first line of the editor. This will
|
||
usually be zero but for <a href="#linkedDoc_from">linked sub-views</a>,
|
||
or <a href="#api_doc">documents</a> instantiated with a non-zero
|
||
first line, it might return other values.</dd>
|
||
<dt id="lastLine"><code><strong>doc.lastLine</strong>() → integer</code></dt>
|
||
<dd>Get the last line of the editor. This will
|
||
usually be <code>doc.lineCount() - 1</code>,
|
||
but for <a href="#linkedDoc_from">linked sub-views</a>,
|
||
it might return other values.</dd>
|
||
|
||
<dt id="getLineHandle"><code><strong>doc.getLineHandle</strong>(num: integer) → LineHandle</code></dt>
|
||
<dd>Fetches the line handle for the given line number.</dd>
|
||
<dt id="getLineNumber"><code><strong>doc.getLineNumber</strong>(handle: LineHandle) → integer</code></dt>
|
||
<dd>Given a line handle, returns the current position of that
|
||
line (or <code>null</code> when it is no longer in the
|
||
document).</dd>
|
||
<dt id="eachLine"><code><strong>doc.eachLine</strong>(f: (line: LineHandle))</code></dt>
|
||
<dt><code><strong>doc.eachLine</strong>(start: integer, end: integer, f: (line: LineHandle))</code></dt>
|
||
<dd>Iterate over the whole document, or if <code>start</code>
|
||
and <code>end</code> line numbers are given, the range
|
||
from <code>start</code> up to (not including) <code>end</code>,
|
||
and call <code>f</code> for each line, passing the line handle.
|
||
This is a faster way to visit a range of line handlers than
|
||
calling <a href="#getLineHandle"><code>getLineHandle</code></a>
|
||
for each of them. Note that line handles have
|
||
a <code>text</code> property containing the line's content (as a
|
||
string).</dd>
|
||
|
||
<dt id="markClean"><code><strong>doc.markClean</strong>()</code></dt>
|
||
<dd>Set the editor content as 'clean', a flag that it will
|
||
retain until it is edited, and which will be set again when such
|
||
an edit is undone again. Useful to track whether the content
|
||
needs to be saved. This function is deprecated in favor
|
||
of <a href="#changeGeneration"><code>changeGeneration</code></a>,
|
||
which allows multiple subsystems to track different notions of
|
||
cleanness without interfering.</dd>
|
||
<dt id="changeGeneration"><code><strong>doc.changeGeneration</strong>(?closeEvent: boolean) → integer</code></dt>
|
||
<dd>Returns a number that can later be passed
|
||
to <a href="#isClean"><code>isClean</code></a> to test whether
|
||
any edits were made (and not undone) in the meantime.
|
||
If <code>closeEvent</code> is true, the current history event
|
||
will be ‘closed’, meaning it can't be combined with further
|
||
changes (rapid typing or deleting events are typically
|
||
combined).</dd>
|
||
<dt id="isClean"><code><strong>doc.isClean</strong>(?generation: integer) → boolean</code></dt>
|
||
<dd>Returns whether the document is currently clean — not
|
||
modified since initialization or the last call
|
||
to <a href="#markClean"><code>markClean</code></a> if no
|
||
argument is passed, or since the matching call
|
||
to <a href="#changeGeneration"><code>changeGeneration</code></a>
|
||
if a generation value is given.</dd>
|
||
</dl>
|
||
|
||
<h3 id="api_selection">Cursor and selection methods</h3>
|
||
|
||
<dl>
|
||
<dt id="getSelection"><code><strong>doc.getSelection</strong>(?lineSep: string) → string</code></dt>
|
||
<dd>Get the currently selected code. Optionally pass a line
|
||
separator to put between the lines in the output. When multiple
|
||
selections are present, they are concatenated with instances
|
||
of <code>lineSep</code> in between.</dd>
|
||
<dt id="getSelections"><code><strong>doc.getSelections</strong>(?lineSep: string) → string</code></dt>
|
||
<dd>Returns an array containing a string for each selection,
|
||
representing the content of the selections.</dd>
|
||
|
||
<dt id="replaceSelection"><code><strong>doc.replaceSelection</strong>(replacement: string, ?select: string)</code></dt>
|
||
<dd>Replace the selection(s) with the given string. By default,
|
||
the new selection ends up after the inserted text. The
|
||
optional <code>select</code> argument can be used to change
|
||
this—passing <code>"around"</code> will cause the new text to be
|
||
selected, passing <code>"start"</code> will collapse the
|
||
selection to the start of the inserted text.</dd>
|
||
<dt id="replaceSelections"><code><strong>doc.replaceSelections</strong>(replacements: array<string>, ?select: string)</code></dt>
|
||
<dd>The length of the given array should be the same as the
|
||
number of active selections. Replaces the content of the
|
||
selections with the strings in the array.
|
||
The <code>select</code> argument works the same as
|
||
in <a href="#replaceSelection"><code>replaceSelection</code></a>.</dd>
|
||
|
||
<dt id="getCursor"><code><strong>doc.getCursor</strong>(?start: string) → {line, ch}</code></dt>
|
||
<dd>Retrieve one end of the <em>primary</em>
|
||
selection. <code>start</code> is a an optional string indicating
|
||
which end of the selection to return. It may
|
||
be <code>"from"</code>, <code>"to"</code>, <code>"head"</code>
|
||
(the side of the selection that moves when you press
|
||
shift+arrow), or <code>"anchor"</code> (the fixed side of the
|
||
selection). Omitting the argument is the same as
|
||
passing <code>"head"</code>. A <code>{line, ch}</code> object
|
||
will be returned.</dd>
|
||
<dt id="listSelections"><code><strong>doc.listSelections</strong>() → array<{anchor, head}<</code></dt>
|
||
<dd>Retrieves a list of all current selections. These will
|
||
always be sorted, and never overlap (overlapping selections are
|
||
merged). Each object in the array contains <code>anchor</code>
|
||
and <code>head</code> properties referring to <code>{line,
|
||
ch}</code> objects.</dd>
|
||
|
||
<dt id="somethingSelected"><code><strong>doc.somethingSelected</strong>() → boolean</code></dt>
|
||
<dd>Return true if any text is selected.</dd>
|
||
<dt id="setCursor"><code><strong>doc.setCursor</strong>(pos: {line, ch}|number, ?ch: number, ?options: object)</code></dt>
|
||
<dd>Set the cursor position. You can either pass a
|
||
single <code>{line, ch}</code> object, or the line and the
|
||
character as two separate parameters. Will replace all
|
||
selections with a single, empty selection at the given position.
|
||
The supported options are the same as for <a href="#setSelection"><code>setSelection</code></a>.</dd>
|
||
|
||
<dt id="setSelection"><code><strong>doc.setSelection</strong>(anchor: {line, ch}, ?head: {line, ch}, ?options: object)</code></dt>
|
||
<dd>Set a single selection range. <code>anchor</code>
|
||
and <code>head</code> should be <code>{line, ch}</code>
|
||
objects. <code>head</code> defaults to <code>anchor</code> when
|
||
not given. These options are supported:
|
||
<dl>
|
||
<dt id="selection_scroll"><code><strong>scroll</strong>: boolean</code></dt>
|
||
<dd>Determines whether the selection head should be scrolled
|
||
into view. Defaults to true.</dd>
|
||
<dt id="selection_origin"><code><strong>origin</strong>: string</code></dt>
|
||
<dd>Detemines whether the selection history event may be
|
||
merged with the previous one. When an origin starts with the
|
||
character <code>+</code>, and the last recorded selection had
|
||
the same origin and was similar (close
|
||
in <a href="#option_historyEventDelay">time</a>, both
|
||
collapsed or both non-collapsed), the new one will replace the
|
||
old one. When it starts with <code>*</code>, it will always
|
||
replace the previous event (if that had the same origin).
|
||
Built-in motion uses the <code>"+move"</code> origin.</dd>
|
||
<dt id="selection_bias"><code><strong>bias</strong>: number</code></dt>
|
||
<dd>Determine the direction into which the selection endpoints
|
||
should be adjusted when they fall inside
|
||
an <a href="#mark_atomic">atomic</a> range. Can be either -1
|
||
(backward) or 1 (forward). When not given, the bias will be
|
||
based on the relative position of the old selection—the editor
|
||
will try to move further away from that, to prevent getting
|
||
stuck.</dd>
|
||
</dl></dd>
|
||
|
||
<dt id="setSelections"><code><strong>doc.setSelections</strong>(ranges: array<{anchor, head}>, ?primary: integer, ?options: object)</code></dt>
|
||
<dd>Sets a new set of selections. There must be at least one
|
||
selection in the given array. When <code>primary</code> is a
|
||
number, it determines which selection is the primary one. When
|
||
it is not given, the primary index is taken from the previous
|
||
selection, or set to the last range if the previous selection
|
||
had less ranges than the new one. Supports the same options
|
||
as <a href="#setSelection"><code>setSelection</code></a>.</dd>
|
||
<dt id="addSelection"><code><strong>doc.addSelection</strong>(anchor: {line, ch}, ?head: {line, ch})</code></dt>
|
||
<dd>Adds a new selection to the existing set of selections, and
|
||
makes it the primary selection.</dd>
|
||
|
||
<dt id="extendSelection"><code><strong>doc.extendSelection</strong>(from: {line, ch}, ?to: {line, ch}, ?options: object)</code></dt>
|
||
<dd>Similar
|
||
to <a href="#setSelection"><code>setSelection</code></a>, but
|
||
will, if shift is held or
|
||
the <a href="#setExtending">extending</a> flag is set, move the
|
||
head of the selection while leaving the anchor at its current
|
||
place. <code>to</code> is optional, and can be passed to ensure
|
||
a region (for example a word or paragraph) will end up selected
|
||
(in addition to whatever lies between that region and the
|
||
current anchor). When multiple selections are present, all but
|
||
the primary selection will be dropped by this method.
|
||
Supports the same options as <a href="#setSelection"><code>setSelection</code></a>.</dd>
|
||
<dt id="extendSelections"><code><strong>doc.extendSelections</strong>(heads: array<{line, ch}>, ?options: object)</code></dt>
|
||
<dd>An equivalent
|
||
of <a href="#extendSelection"><code>extendSelection</code></a>
|
||
that acts on all selections at once.</dd>
|
||
<dt id="extendSelectionsBy"><code><strong>doc.extendSelectionsBy</strong>(f: function(range: {anchor, head}) → {anchor, head}), ?options: object)</code></dt>
|
||
<dd>Applies the given function to all existing selections, and
|
||
calls <a href="#extendSelections"><code>extendSelections</code></a>
|
||
on the result.</dd>
|
||
<dt id="setExtending"><code><strong>doc.setExtending</strong>(value: boolean)</code></dt>
|
||
<dd>Sets or clears the 'extending' flag, which acts similar to
|
||
the shift key, in that it will cause cursor movement and calls
|
||
to <a href="#extendSelection"><code>extendSelection</code></a>
|
||
to leave the selection anchor in place.</dd>
|
||
<dt id="getExtending"><code><strong>doc.getExtending</strong>() → boolean</code></dt>
|
||
<dd>Get the value of the 'extending' flag.</dd>
|
||
|
||
<dt id="hasFocus"><code><strong>cm.hasFocus</strong>() → boolean</code></dt>
|
||
<dd>Tells you whether the editor currently has focus.</dd>
|
||
|
||
<dt id="findPosH"><code><strong>cm.findPosH</strong>(start: {line, ch}, amount: integer, unit: string, visually: boolean) → {line, ch, ?hitSide: boolean}</code></dt>
|
||
<dd>Used to find the target position for horizontal cursor
|
||
motion. <code>start</code> is a <code>{line, ch}</code>
|
||
object, <code>amount</code> an integer (may be negative),
|
||
and <code>unit</code> one of the
|
||
string <code>"char"</code>, <code>"column"</code>,
|
||
or <code>"word"</code>. Will return a position that is produced
|
||
by moving <code>amount</code> times the distance specified
|
||
by <code>unit</code>. When <code>visually</code> is true, motion
|
||
in right-to-left text will be visual rather than logical. When
|
||
the motion was clipped by hitting the end or start of the
|
||
document, the returned value will have a <code>hitSide</code>
|
||
property set to true.</dd>
|
||
<dt id="findPosV"><code><strong>cm.findPosV</strong>(start: {line, ch}, amount: integer, unit: string) → {line, ch, ?hitSide: boolean}</code></dt>
|
||
<dd>Similar to <a href="#findPosH"><code>findPosH</code></a>,
|
||
but used for vertical motion. <code>unit</code> may
|
||
be <code>"line"</code> or <code>"page"</code>. The other
|
||
arguments and the returned value have the same interpretation as
|
||
they have in <code>findPosH</code>.</dd>
|
||
|
||
<dt id="findWordAt"><code><strong>cm.findWordAt</strong>(pos: {line, ch}) → {anchor: {line, ch}, head: {line, ch}}</code></dt>
|
||
<dd>Returns the start and end of the 'word' (the stretch of
|
||
letters, whitespace, or punctuation) at the given position.</dd>
|
||
</dl>
|
||
|
||
<h3 id="api_configuration">Configuration methods</h3>
|
||
|
||
<dl>
|
||
<dt id="setOption"><code><strong>cm.setOption</strong>(option: string, value: any)</code></dt>
|
||
<dd>Change the configuration of the editor. <code>option</code>
|
||
should the name of an <a href="#config">option</a>,
|
||
and <code>value</code> should be a valid value for that
|
||
option.</dd>
|
||
<dt id="getOption"><code><strong>cm.getOption</strong>(option: string) → any</code></dt>
|
||
<dd>Retrieves the current value of the given option for this
|
||
editor instance.</dd>
|
||
|
||
<dt id="addKeyMap"><code><strong>cm.addKeyMap</strong>(map: object, bottom: boolean)</code></dt>
|
||
<dd>Attach an additional <a href="#keymaps">key map</a> to the
|
||
editor. This is mostly useful for addons that need to register
|
||
some key handlers without trampling on
|
||
the <a href="#option_extraKeys"><code>extraKeys</code></a>
|
||
option. Maps added in this way have a higher precedence than
|
||
the <code>extraKeys</code>
|
||
and <a href="#option_keyMap"><code>keyMap</code></a> options,
|
||
and between them, the maps added earlier have a lower precedence
|
||
than those added later, unless the <code>bottom</code> argument
|
||
was passed, in which case they end up below other key maps added
|
||
with this method.</dd>
|
||
<dt id="removeKeyMap"><code><strong>cm.removeKeyMap</strong>(map: object)</code></dt>
|
||
<dd>Disable a keymap added
|
||
with <a href="#addKeyMap"><code>addKeyMap</code></a>. Either
|
||
pass in the key map object itself, or a string, which will be
|
||
compared against the <code>name</code> property of the active
|
||
key maps.</dd>
|
||
|
||
<dt id="addOverlay"><code><strong>cm.addOverlay</strong>(mode: string|object, ?options: object)</code></dt>
|
||
<dd>Enable a highlighting overlay. This is a stateless mini-mode
|
||
that can be used to add extra highlighting. For example,
|
||
the <a href="../demo/search.html">search addon</a> uses it to
|
||
highlight the term that's currently being
|
||
searched. <code>mode</code> can be a <a href="#option_mode">mode
|
||
spec</a> or a mode object (an object with
|
||
a <a href="#token"><code>token</code></a> method).
|
||
The <code>options</code> parameter is optional. If given, it
|
||
should be an object. Currently, only the <code>opaque</code>
|
||
option is recognized. This defaults to off, but can be given to
|
||
allow the overlay styling, when not <code>null</code>, to
|
||
override the styling of the base mode entirely, instead of the
|
||
two being applied together.</dd>
|
||
<dt id="removeOverlay"><code><strong>cm.removeOverlay</strong>(mode: string|object)</code></dt>
|
||
<dd>Pass this the exact value passed for the <code>mode</code>
|
||
parameter to <a href="#addOverlay"><code>addOverlay</code></a>,
|
||
or a string that corresponds to the <code>name</code> propery of
|
||
that value, to remove an overlay again.</dd>
|
||
|
||
<dt id="on"><code><strong>cm.on</strong>(type: string, func: (...args))</code></dt>
|
||
<dd>Register an event handler for the given event type (a
|
||
string) on the editor instance. There is also
|
||
a <code>CodeMirror.on(object, type, func)</code> version
|
||
that allows registering of events on any object.</dd>
|
||
<dt id="off"><code><strong>cm.off</strong>(type: string, func: (...args))</code></dt>
|
||
<dd>Remove an event handler on the editor instance. An
|
||
equivalent <code>CodeMirror.off(object, type,
|
||
func)</code> also exists.</dd>
|
||
</dl>
|
||
|
||
<h3 id="api_doc">Document management methods</h3>
|
||
|
||
<p id="Doc">Each editor is associated with an instance
|
||
of <code>CodeMirror.Doc</code>, its document. A document
|
||
represents the editor content, plus a selection, an undo history,
|
||
and a <a href="#option_mode">mode</a>. A document can only be
|
||
associated with a single editor at a time. You can create new
|
||
documents by calling the <code>CodeMirror.Doc(text, mode,
|
||
firstLineNumber)</code> constructor. The last two arguments are
|
||
optional and can be used to set a mode for the document and make
|
||
it start at a line number other than 0, respectively.</p>
|
||
|
||
<dl>
|
||
<dt id="getDoc"><code><strong>cm.getDoc</strong>() → Doc</code></dt>
|
||
<dd>Retrieve the currently active document from an editor.</dd>
|
||
<dt id="getEditor"><code><strong>doc.getEditor</strong>() → CodeMirror</code></dt>
|
||
<dd>Retrieve the editor associated with a document. May
|
||
return <code>null</code>.</dd>
|
||
|
||
<dt id="swapDoc"><code><strong>cm.swapDoc</strong>(doc: CodeMirror.Doc) → Doc</code></dt>
|
||
<dd>Attach a new document to the editor. Returns the old
|
||
document, which is now no longer associated with an editor.</dd>
|
||
|
||
<dt id="copy"><code><strong>doc.copy</strong>(copyHistory: boolean) → Doc</code></dt>
|
||
<dd>Create an identical copy of the given doc.
|
||
When <code>copyHistory</code> is true, the history will also be
|
||
copied. Can not be called directly on an editor.</dd>
|
||
|
||
<dt id="linkedDoc"><code><strong>doc.linkedDoc</strong>(options: object) → Doc</code></dt>
|
||
<dd>Create a new document that's linked to the target document.
|
||
Linked documents will stay in sync (changes to one are also
|
||
applied to the other) until <a href="#unlinkDoc">unlinked</a>.
|
||
These are the options that are supported:
|
||
<dl>
|
||
<dt id="linkedDoc_sharedHist"><code><strong>sharedHist</strong>: boolean</code></dt>
|
||
<dd>When turned on, the linked copy will share an undo
|
||
history with the original. Thus, something done in one of
|
||
the two can be undone in the other, and vice versa.</dd>
|
||
<dt id="linkedDoc_from"><code><strong>from</strong>: integer</code></dt>
|
||
<dt id="linkedDoc_to"><code><strong>to</strong>: integer</code></dt>
|
||
<dd>Can be given to make the new document a subview of the
|
||
original. Subviews only show a given range of lines. Note
|
||
that line coordinates inside the subview will be consistent
|
||
with those of the parent, so that for example a subview
|
||
starting at line 10 will refer to its first line as line 10,
|
||
not 0.</dd>
|
||
<dt id="linkedDoc_mode"><code><strong>mode</strong>: string|object</code></dt>
|
||
<dd>By default, the new document inherits the mode of the
|
||
parent. This option can be set to
|
||
a <a href="#option_mode">mode spec</a> to give it a
|
||
different mode.</dd>
|
||
</dl></dd>
|
||
<dt id="unlinkDoc"><code><strong>doc.unlinkDoc</strong>(doc: CodeMirror.Doc)</code></dt>
|
||
<dd>Break the link between two documents. After calling this,
|
||
changes will no longer propagate between the documents, and, if
|
||
they had a shared history, the history will become
|
||
separate.</dd>
|
||
<dt id="iterLinkedDocs"><code><strong>doc.iterLinkedDocs</strong>(function: (doc: CodeMirror.Doc, sharedHist: boolean))</code></dt>
|
||
<dd>Will call the given function for all documents linked to the
|
||
target document. It will be passed two arguments, the linked document
|
||
and a boolean indicating whether that document shares history
|
||
with the target.</dd>
|
||
</dl>
|
||
|
||
<h3 id="api_history">History-related methods</h3>
|
||
|
||
<dl>
|
||
<dt id="undo"><code><strong>doc.undo</strong>()</code></dt>
|
||
<dd>Undo one edit (if any undo events are stored).</dd>
|
||
<dt id="redo"><code><strong>doc.redo</strong>()</code></dt>
|
||
<dd>Redo one undone edit.</dd>
|
||
|
||
<dt id="undoSelection"><code><strong>doc.undoSelection</strong>()</code></dt>
|
||
<dd>Undo one edit or selection change.</dd>
|
||
<dt id="redoSelection"><code><strong>doc.redoSelection</strong>()</code></dt>
|
||
<dd>Redo one undone edit or selection change.</dd>
|
||
|
||
<dt id="historySize"><code><strong>doc.historySize</strong>() → {undo: integer, redo: integer}</code></dt>
|
||
<dd>Returns an object with <code>{undo, redo}</code> properties,
|
||
both of which hold integers, indicating the amount of stored
|
||
undo and redo operations.</dd>
|
||
<dt id="clearHistory"><code><strong>doc.clearHistory</strong>()</code></dt>
|
||
<dd>Clears the editor's undo history.</dd>
|
||
<dt id="getHistory"><code><strong>doc.getHistory</strong>() → object</code></dt>
|
||
<dd>Get a (JSON-serializeable) representation of the undo history.</dd>
|
||
<dt id="setHistory"><code><strong>doc.setHistory</strong>(history: object)</code></dt>
|
||
<dd>Replace the editor's undo history with the one provided,
|
||
which must be a value as returned
|
||
by <a href="#getHistory"><code>getHistory</code></a>. Note that
|
||
this will have entirely undefined results if the editor content
|
||
isn't also the same as it was when <code>getHistory</code> was
|
||
called.</dd>
|
||
</dl>
|
||
|
||
<h3 id="api_marker">Text-marking methods</h3>
|
||
|
||
<dl>
|
||
<dt id="markText"><code><strong>doc.markText</strong>(from: {line, ch}, to: {line, ch}, ?options: object) → TextMarker</code></dt>
|
||
<dd>Can be used to mark a range of text with a specific CSS
|
||
class name. <code>from</code> and <code>to</code> should
|
||
be <code>{line, ch}</code> objects. The <code>options</code>
|
||
parameter is optional. When given, it should be an object that
|
||
may contain the following configuration options:
|
||
<dl>
|
||
<dt id="mark_className"><code><strong>className</strong>: string</code></dt>
|
||
<dd>Assigns a CSS class to the marked stretch of text.</dd>
|
||
<dt id="mark_inclusiveLeft"><code><strong>inclusiveLeft</strong>: boolean</code></dt>
|
||
<dd>Determines whether
|
||
text inserted on the left of the marker will end up inside
|
||
or outside of it.</dd>
|
||
<dt id="mark_inclusiveRight"><code><strong>inclusiveRight</strong>: boolean</code></dt>
|
||
<dd>Like <code>inclusiveLeft</code>,
|
||
but for the right side.</dd>
|
||
<dt id="mark_atomic"><code><strong>atomic</strong>: boolean</code></dt>
|
||
<dd>Atomic ranges act as a single unit when cursor movement is
|
||
concerned—i.e. it is impossible to place the cursor inside of
|
||
them. In atomic ranges, <code>inclusiveLeft</code>
|
||
and <code>inclusiveRight</code> have a different meaning—they
|
||
will prevent the cursor from being placed respectively
|
||
directly before and directly after the range.</dd>
|
||
<dt id="mark_collapsed"><code><strong>collapsed</strong>: boolean</code></dt>
|
||
<dd>Collapsed ranges do not show up in the display. Setting a
|
||
range to be collapsed will automatically make it atomic.</dd>
|
||
<dt id="mark_clearOnEnter"><code><strong>clearOnEnter</strong>: boolean</code></dt>
|
||
<dd>When enabled, will cause the mark to clear itself whenever
|
||
the cursor enters its range. This is mostly useful for
|
||
text-replacement widgets that need to 'snap open' when the
|
||
user tries to edit them. The
|
||
<a href="#event_clear"><code>"clear"</code></a> event
|
||
fired on the range handle can be used to be notified when this
|
||
happens.</dd>
|
||
<dt id="mark_clearWhenEmpty"><code><strong>clearWhenEmpty</strong>: boolean</code></dt>
|
||
<dd>Determines whether the mark is automatically cleared when
|
||
it becomes empty. Default is true.</dd>
|
||
<dt id="mark_replacedWith"><code><strong>replacedWith</strong>: Element</code></dt>
|
||
<dd>Use a given node to display this range. Implies both
|
||
collapsed and atomic. The given DOM node <em>must</em> be an
|
||
inline element (as opposed to a block element).</dd>
|
||
<dt><code><strong>handleMouseEvents</strong>: boolean</code></dt>
|
||
<dd>When <code>replacedWith</code> is given, this determines
|
||
whether the editor will capture mouse and drag events
|
||
occurring in this widget. Default is false—the events will be
|
||
left alone for the default browser handler, or specific
|
||
handlers on the widget, to capture.</dd>
|
||
<dt id="mark_readOnly"><code><strong>readOnly</strong>: boolean</code></dt>
|
||
<dd>A read-only span can, as long as it is not cleared, not be
|
||
modified except by
|
||
calling <a href="#setValue"><code>setValue</code></a> to reset
|
||
the whole document. <em>Note:</em> adding a read-only span
|
||
currently clears the undo history of the editor, because
|
||
existing undo events being partially nullified by read-only
|
||
spans would corrupt the history (in the current
|
||
implementation).</dd>
|
||
<dt id="mark_addToHistory"><code><strong>addToHistory</strong>: boolean</code></dt>
|
||
<dd>When set to true (default is false), adding this marker
|
||
will create an event in the undo history that can be
|
||
individually undone (clearing the marker).</dd>
|
||
<dt id="mark_startStyle"><code><strong>startStyle</strong>: string</code></dt><dd>Can be used to specify
|
||
an extra CSS class to be applied to the leftmost span that
|
||
is part of the marker.</dd>
|
||
<dt id="mark_endStyle"><code><strong>endStyle</strong>: string</code></dt><dd>Equivalent
|
||
to <code>startStyle</code>, but for the rightmost span.</dd>
|
||
<dt id="mark_title"><code><strong>title</strong>:
|
||
string</code></dt><dd>When given, will give the nodes created
|
||
for this span a HTML <code>title</code> attribute with the
|
||
given value.</dd>
|
||
<dt id="mark_shared"><code><strong>shared</strong>: boolean</code></dt><dd>When the
|
||
target document is <a href="#linkedDoc">linked</a> to other
|
||
documents, you can set <code>shared</code> to true to make the
|
||
marker appear in all documents. By default, a marker appears
|
||
only in its target document.</dd>
|
||
</dl>
|
||
The method will return an object that represents the marker
|
||
(with constructor <code>CodeMirror.TextMarker</code>), which
|
||
exposes three methods:
|
||
<code><strong>clear</strong>()</code>, to remove the mark,
|
||
<code><strong>find</strong>()</code>, which returns
|
||
a <code>{from, to}</code> object (both holding document
|
||
positions), indicating the current position of the marked range,
|
||
or <code>undefined</code> if the marker is no longer in the
|
||
document, and finally <code><strong>changed</strong>()</code>,
|
||
which you can call if you've done something that might change
|
||
the size of the marker (for example changing the content of
|
||
a <a href="#mark_replacedWith"><code>replacedWith</code></a>
|
||
node), and want to cheaply update the display.</dd>
|
||
|
||
<dt id="setBookmark"><code><strong>doc.setBookmark</strong>(pos: {line, ch}, ?options: object) → TextMarker</code></dt>
|
||
<dd>Inserts a bookmark, a handle that follows the text around it
|
||
as it is being edited, at the given position. A bookmark has two
|
||
methods <code>find()</code> and <code>clear()</code>. The first
|
||
returns the current position of the bookmark, if it is still in
|
||
the document, and the second explicitly removes the bookmark.
|
||
The options argument is optional. If given, the following
|
||
properties are recognized:
|
||
<dl>
|
||
<dt><code><strong>widget</strong>: Element</code></dt><dd>Can be used to display a DOM
|
||
node at the current location of the bookmark (analogous to
|
||
the <a href="#mark_replacedWith"><code>replacedWith</code></a>
|
||
option to <a href="#markText"><code>markText</code></a>).</dd>
|
||
<dt><code><strong>insertLeft</strong>: boolean</code></dt><dd>By default, text typed
|
||
when the cursor is on top of the bookmark will end up to the
|
||
right of the bookmark. Set this option to true to make it go
|
||
to the left instead.</dd>
|
||
<dt><code><strong>shared</strong>: boolean</code></dt><dd>See
|
||
the corresponding <a href="#mark_shared">option</a>
|
||
to <code>markText</code>.</dd>
|
||
</dl></dd>
|
||
|
||
<dt id="findMarks"><code><strong>doc.findMarks</strong>(from: {line, ch}, to: {line, ch}) → array<TextMarker></code></dt>
|
||
<dd>Returns an array of all the bookmarks and marked ranges
|
||
found between the given positions.</dd>
|
||
<dt id="findMarksAt"><code><strong>doc.findMarksAt</strong>(pos: {line, ch}) → array<TextMarker></code></dt>
|
||
<dd>Returns an array of all the bookmarks and marked ranges
|
||
present at the given position.</dd>
|
||
<dt id="getAllMarks"><code><strong>doc.getAllMarks</strong>() → array<TextMarker></code></dt>
|
||
<dd>Returns an array containing all marked ranges in the document.</dd>
|
||
</dl>
|
||
|
||
<h3 id="api_decoration">Widget, gutter, and decoration methods</h3>
|
||
|
||
<dl>
|
||
<dt id="setGutterMarker"><code><strong>cm.setGutterMarker</strong>(line: integer|LineHandle, gutterID: string, value: Element) → LineHandle</code></dt>
|
||
<dd>Sets the gutter marker for the given gutter (identified by
|
||
its CSS class, see
|
||
the <a href="#option_gutters"><code>gutters</code></a> option)
|
||
to the given value. Value can be either <code>null</code>, to
|
||
clear the marker, or a DOM element, to set it. The DOM element
|
||
will be shown in the specified gutter next to the specified
|
||
line.</dd>
|
||
|
||
<dt id="clearGutter"><code><strong>cm.clearGutter</strong>(gutterID: string)</code></dt>
|
||
<dd>Remove all gutter markers in
|
||
the <a href="#option_gutters">gutter</a> with the given ID.</dd>
|
||
|
||
<dt id="addLineClass"><code><strong>doc.addLineClass</strong>(line: integer|LineHandle, where: string, class: string) → LineHandle</code></dt>
|
||
<dd>Set a CSS class name for the given line. <code>line</code>
|
||
can be a number or a line handle. <code>where</code> determines
|
||
to which element this class should be applied, can can be one
|
||
of <code>"text"</code> (the text element, which lies in front of
|
||
the selection), <code>"background"</code> (a background element
|
||
that will be behind the selection), or <code>"wrap"</code> (the
|
||
wrapper node that wraps all of the line's elements, including
|
||
gutter elements). <code>class</code> should be the name of the
|
||
class to apply.</dd>
|
||
|
||
<dt id="removeLineClass"><code><strong>doc.removeLineClass</strong>(line: integer|LineHandle, where: string, class: string) → LineHandle</code></dt>
|
||
<dd>Remove a CSS class from a line. <code>line</code> can be a
|
||
line handle or number. <code>where</code> should be one
|
||
of <code>"text"</code>, <code>"background"</code>,
|
||
or <code>"wrap"</code>
|
||
(see <a href="#addLineClass"><code>addLineClass</code></a>). <code>class</code>
|
||
can be left off to remove all classes for the specified node, or
|
||
be a string to remove only a specific class.</dd>
|
||
|
||
<dt id="lineInfo"><code><strong>cm.lineInfo</strong>(line: integer|LineHandle) → object</code></dt>
|
||
<dd>Returns the line number, text content, and marker status of
|
||
the given line, which can be either a number or a line handle.
|
||
The returned object has the structure <code>{line, handle, text,
|
||
gutterMarkers, textClass, bgClass, wrapClass, widgets}</code>,
|
||
where <code>gutterMarkers</code> is an object mapping gutter IDs
|
||
to marker elements, and <code>widgets</code> is an array
|
||
of <a href="#addLineWidget">line widgets</a> attached to this
|
||
line, and the various class properties refer to classes added
|
||
with <a href="#addLineClass"><code>addLineClass</code></a>.</dd>
|
||
|
||
<dt id="addWidget"><code><strong>cm.addWidget</strong>(pos: {line, ch}, node: Element, scrollIntoView: boolean)</code></dt>
|
||
<dd>Puts <code>node</code>, which should be an absolutely
|
||
positioned DOM node, into the editor, positioned right below the
|
||
given <code>{line, ch}</code> position.
|
||
When <code>scrollIntoView</code> is true, the editor will ensure
|
||
that the entire node is visible (if possible). To remove the
|
||
widget again, simply use DOM methods (move it somewhere else, or
|
||
call <code>removeChild</code> on its parent).</dd>
|
||
|
||
<dt id="addLineWidget"><code><strong>cm.addLineWidget</strong>(line: integer|LineHandle, node: Element, ?options: object) → LineWidget</code></dt>
|
||
<dd>Adds a line widget, an element shown below a line, spanning
|
||
the whole of the editor's width, and moving the lines below it
|
||
downwards. <code>line</code> should be either an integer or a
|
||
line handle, and <code>node</code> should be a DOM node, which
|
||
will be displayed below the given line. <code>options</code>,
|
||
when given, should be an object that configures the behavior of
|
||
the widget. The following options are supported (all default to
|
||
false):
|
||
<dl>
|
||
<dt><code><strong>coverGutter</strong>: boolean</code></dt>
|
||
<dd>Whether the widget should cover the gutter.</dd>
|
||
<dt><code><strong>noHScroll</strong>: boolean</code></dt>
|
||
<dd>Whether the widget should stay fixed in the face of
|
||
horizontal scrolling.</dd>
|
||
<dt><code><strong>above</strong>: boolean</code></dt>
|
||
<dd>Causes the widget to be placed above instead of below
|
||
the text of the line.</dd>
|
||
<dt><code><strong>handleMouseEvents</strong>: boolean</code></dt>
|
||
<dd>Determines whether the editor will capture mouse and
|
||
drag events occurring in this widget. Default is false—the
|
||
events will be left alone for the default browser handler,
|
||
or specific handlers on the widget, to capture.</dd>
|
||
<dt><code><strong>insertAt</strong>: integer</code></dt>
|
||
<dd>By default, the widget is added below other widgets for
|
||
the line. This option can be used to place it at a different
|
||
position (zero for the top, N to put it after the Nth other
|
||
widget). Note that this only has effect once, when the
|
||
widget is created.
|
||
</dl>
|
||
Note that the widget node will become a descendant of nodes with
|
||
CodeMirror-specific CSS classes, and those classes might in some
|
||
cases affect it. This method returns an object that represents
|
||
the widget placement. It'll have a <code>line</code> property
|
||
pointing at the line handle that it is associated with, and the following methods:
|
||
<dl>
|
||
<dt id="widget_clear"><code><strong>clear</strong>()</code></dt><dd>Removes the widget.</dd>
|
||
<dt id="widget_changed"><code><strong>changed</strong>()</code></dt><dd>Call
|
||
this if you made some change to the widget's DOM node that
|
||
might affect its height. It'll force CodeMirror to update
|
||
the height of the line that contains the widget.</dd>
|
||
</dl>
|
||
</dd>
|
||
</dl>
|
||
|
||
<h3 id="api_sizing">Sizing, scrolling and positioning methods</h3>
|
||
|
||
<dl>
|
||
<dt id="setSize"><code><strong>cm.setSize</strong>(width: number|string, height: number|string)</code></dt>
|
||
<dd>Programatically set the size of the editor (overriding the
|
||
applicable <a href="#css-resize">CSS
|
||
rules</a>). <code>width</code> and <code>height</code>
|
||
can be either numbers (interpreted as pixels) or CSS units
|
||
(<code>"100%"</code>, for example). You can
|
||
pass <code>null</code> for either of them to indicate that that
|
||
dimension should not be changed.</dd>
|
||
|
||
<dt id="scrollTo"><code><strong>cm.scrollTo</strong>(x: number, y: number)</code></dt>
|
||
<dd>Scroll the editor to a given (pixel) position. Both
|
||
arguments may be left as <code>null</code>
|
||
or <code>undefined</code> to have no effect.</dd>
|
||
<dt id="getScrollInfo"><code><strong>cm.getScrollInfo</strong>() → {left, top, width, height, clientWidth, clientHeight}</code></dt>
|
||
<dd>Get an <code>{left, top, width, height, clientWidth,
|
||
clientHeight}</code> object that represents the current scroll
|
||
position, the size of the scrollable area, and the size of the
|
||
visible area (minus scrollbars).</dd>
|
||
<dt id="scrollIntoView"><code><strong>cm.scrollIntoView</strong>(what: {line, ch}|{left, top, right, bottom}|{from, to}|null, ?margin: number)</code></dt>
|
||
<dd>Scrolls the given position into view. <code>what</code> may
|
||
be <code>null</code> to scroll the cursor into view,
|
||
a <code>{line, ch}</code> position to scroll a character into
|
||
view, a <code>{left, top, right, bottom}</code> pixel range (in
|
||
editor-local coordinates), or a range <code>{from, to}</code>
|
||
containing either two character positions or two pixel squares.
|
||
The <code>margin</code> parameter is optional. When given, it
|
||
indicates the amount of vertical pixels around the given area
|
||
that should be made visible as well.</dd>
|
||
|
||
<dt id="cursorCoords"><code><strong>cm.cursorCoords</strong>(where: boolean|{line, ch}, mode: string) → {left, top, bottom}</code></dt>
|
||
<dd>Returns an <code>{left, top, bottom}</code> object
|
||
containing the coordinates of the cursor position.
|
||
If <code>mode</code> is <code>"local"</code>, they will be
|
||
relative to the top-left corner of the editable document. If it
|
||
is <code>"page"</code> or not given, they are relative to the
|
||
top-left corner of the page. <code>where</code> can be a boolean
|
||
indicating whether you want the start (<code>true</code>) or the
|
||
end (<code>false</code>) of the selection, or, if a <code>{line,
|
||
ch}</code> object is given, it specifies the precise position at
|
||
which you want to measure.</dd>
|
||
<dt id="charCoords"><code><strong>cm.charCoords</strong>(pos: {line, ch}, ?mode: string) → {left, right, top, bottom}</code></dt>
|
||
<dd>Returns the position and dimensions of an arbitrary
|
||
character. <code>pos</code> should be a <code>{line, ch}</code>
|
||
object. This differs from <code>cursorCoords</code> in that
|
||
it'll give the size of the whole character, rather than just the
|
||
position that the cursor would have when it would sit at that
|
||
position.</dd>
|
||
<dt id="coordsChar"><code><strong>cm.coordsChar</strong>(object: {left, top}, ?mode: string) → {line, ch}</code></dt>
|
||
<dd>Given an <code>{left, top}</code> object, returns
|
||
the <code>{line, ch}</code> position that corresponds to it. The
|
||
optional <code>mode</code> parameter determines relative to what
|
||
the coordinates are interpreted. It may
|
||
be <code>"window"</code>, <code>"page"</code> (the default),
|
||
or <code>"local"</code>.</dd>
|
||
<dt id="lineAtHeight"><code><strong>cm.lineAtHeight</strong>(height: number, ?mode: string) → number</code></dt>
|
||
<dd>Computes the line at the given pixel
|
||
height. <code>mode</code> can be one of the same strings
|
||
that <a href="#coordsChar"><code>coordsChar</code></a>
|
||
accepts.</dd>
|
||
<dt id="heightAtLine"><code><strong>cm.heightAtLine</strong>(line: number, ?mode: string) → number</code></dt>
|
||
<dd>Computes the height of the top of a line, in the coordinate
|
||
system specified by <code>mode</code>
|
||
(see <a href="#coordsChar"><code>coordsChar</code></a>), which
|
||
defaults to <code>"page"</code>. When a line below the bottom of
|
||
the document is specified, the returned value is the bottom of
|
||
the last line in the document.</dd>
|
||
<dt id="defaultTextHeight"><code><strong>cm.defaultTextHeight</strong>() → number</code></dt>
|
||
<dd>Returns the line height of the default font for the editor.</dd>
|
||
<dt id="defaultCharWidth"><code><strong>cm.defaultCharWidth</strong>() → number</code></dt>
|
||
<dd>Returns the pixel width of an 'x' in the default font for
|
||
the editor. (Note that for non-monospace fonts, this is mostly
|
||
useless, and even for monospace fonts, non-ascii characters
|
||
might have a different width).</dd>
|
||
|
||
<dt id="getViewport"><code><strong>cm.getViewport</strong>() → {from: number, to: number}</code></dt>
|
||
<dd>Returns a <code>{from, to}</code> object indicating the
|
||
start (inclusive) and end (exclusive) of the currently rendered
|
||
part of the document. In big documents, when most content is
|
||
scrolled out of view, CodeMirror will only render the visible
|
||
part, and a margin around it. See also
|
||
the <a href="#event_viewportChange"><code>viewportChange</code></a>
|
||
event.</dd>
|
||
|
||
<dt id="refresh"><code><strong>cm.refresh</strong>()</code></dt>
|
||
<dd>If your code does something to change the size of the editor
|
||
element (window resizes are already listened for), or unhides
|
||
it, you should probably follow up by calling this method to
|
||
ensure CodeMirror is still looking as intended.</dd>
|
||
</dl>
|
||
|
||
<h3 id="api_mode">Mode, state, and token-related methods</h3>
|
||
|
||
<p>When writing language-aware functionality, it can often be
|
||
useful to hook into the knowledge that the CodeMirror language
|
||
mode has. See <a href="#modeapi">the section on modes</a> for a
|
||
more detailed description of how these work.</p>
|
||
|
||
<dl>
|
||
<dt id="getMode"><code><strong>doc.getMode</strong>() → object</code></dt>
|
||
<dd>Gets the (outer) mode object for the editor. Note that this
|
||
is distinct from <code>getOption("mode")</code>, which gives you
|
||
the mode specification, rather than the resolved, instantiated
|
||
<a href="#defineMode">mode object</a>.</dd>
|
||
|
||
<dt id="getModeAt"><code><strong>doc.getModeAt</strong>(pos: {line, ch}) → object</code></dt>
|
||
<dd>Gets the inner mode at a given position. This will return
|
||
the same as <a href="#getMode"><code>getMode</code></a> for
|
||
simple modes, but will return an inner mode for nesting modes
|
||
(such as <code>htmlmixed</code>).</dd>
|
||
|
||
<dt id="getTokenAt"><code><strong>cm.getTokenAt</strong>(pos: {line, ch}, ?precise: boolean) → object</code></dt>
|
||
<dd>Retrieves information about the token the current mode found
|
||
before the given position (a <code>{line, ch}</code> object). The
|
||
returned object has the following properties:
|
||
<dl>
|
||
<dt><code><strong>start</strong></code></dt><dd>The character (on the given line) at which the token starts.</dd>
|
||
<dt><code><strong>end</strong></code></dt><dd>The character at which the token ends.</dd>
|
||
<dt><code><strong>string</strong></code></dt><dd>The token's string.</dd>
|
||
<dt><code><strong>type</strong></code></dt><dd>The token type the mode assigned
|
||
to the token, such as <code>"keyword"</code>
|
||
or <code>"comment"</code> (may also be null).</dd>
|
||
<dt><code><strong>state</strong></code></dt><dd>The mode's state at the end of this token.</dd>
|
||
</dl>
|
||
If <code>precise</code> is true, the token will be guaranteed to be accurate based on recent edits. If false or
|
||
not specified, the token will use cached state information, which will be faster but might not be accurate if
|
||
edits were recently made and highlighting has not yet completed.
|
||
</dd>
|
||
|
||
<dt id="getTokenTypeAt"><code><strong>cm.getTokenTypeAt</strong>(pos: {line, ch}) → string</code></dt>
|
||
<dd>This is a (much) cheaper version
|
||
of <a href="#getTokenAt"><code>getTokenAt</code></a> useful for
|
||
when you just need the type of the token at a given position,
|
||
and no other information. Will return <code>null</code> for
|
||
unstyled tokens, and a string, potentially containing multiple
|
||
space-separated style names, otherwise.</dd>
|
||
|
||
<dt id="getHelpers"><code><strong>cm.getHelpers</strong>(pos: {line, ch}, type: string) → array<helper></code></dt>
|
||
<dd>Fetch the set of applicable helper values for the given
|
||
position. Helpers provide a way to look up functionality
|
||
appropriate for a mode. The <code>type</code> argument provides
|
||
the helper namespace (see
|
||
<a href="#registerHelper"><code>registerHelper</code></a>), in
|
||
which the values will be looked up. When the mode itself has a
|
||
property that corresponds to the <code>type</code>, that
|
||
directly determines the keys that are used to look up the helper
|
||
values (it may be either a single string, or an array of
|
||
strings). Failing that, the mode's <code>helperType</code>
|
||
property and finally the mode's name are used.</dd>
|
||
<dd>For example, the JavaScript mode has a
|
||
property <code>fold</code> containing <code>"brace"</code>. When
|
||
the <code>brace-fold</code> addon is loaded, that defines a
|
||
helper named <code>brace</code> in the <code>fold</code>
|
||
namespace. This is then used by
|
||
the <a href="#addon_foldcode"><code>foldcode</code></a> addon to
|
||
figure out that it can use that folding function to fold
|
||
JavaScript code.</dd>
|
||
<dd>When any <a href="#registerGlobalHelper">'global'</a>
|
||
helpers are defined for the given namespace, their predicates
|
||
are called on the current mode and editor, and all those that
|
||
declare they are applicable will also be added to the array that
|
||
is returned.</dd>
|
||
|
||
<dt id="getHelper"><code><strong>cm.getHelper</strong>(pos: {line, ch}, type: string) → helper</code></dt>
|
||
<dd>Returns the first applicable helper value.
|
||
See <a href="#getHelpers"><code>getHelpers</code></a>.</dd>
|
||
|
||
<dt id="getStateAfter"><code><strong>cm.getStateAfter</strong>(?line: integer, ?precise: boolean) → object</code></dt>
|
||
<dd>Returns the mode's parser state, if any, at the end of the
|
||
given line number. If no line number is given, the state at the
|
||
end of the document is returned. This can be useful for storing
|
||
parsing errors in the state, or getting other kinds of
|
||
contextual information for a line. <code>precise</code> is defined
|
||
as in <code>getTokenAt()</code>.</dd>
|
||
</dl>
|
||
|
||
<h3 id="api_misc">Miscellaneous methods</h3>
|
||
|
||
<dl>
|
||
<dt id="operation"><code><strong>cm.operation</strong>(func: () → any) → any</code></dt>
|
||
<dd>CodeMirror internally buffers changes and only updates its
|
||
DOM structure after it has finished performing some operation.
|
||
If you need to perform a lot of operations on a CodeMirror
|
||
instance, you can call this method with a function argument. It
|
||
will call the function, buffering up all changes, and only doing
|
||
the expensive update after the function returns. This can be a
|
||
lot faster. The return value from this method will be the return
|
||
value of your function.</dd>
|
||
|
||
<dt id="indentLine"><code><strong>cm.indentLine</strong>(line: integer, ?dir: string|integer)</code></dt>
|
||
<dd>Adjust the indentation of the given line. The second
|
||
argument (which defaults to <code>"smart"</code>) may be one of:
|
||
<dl>
|
||
<dt><code><strong>"prev"</strong></code></dt>
|
||
<dd>Base indentation on the indentation of the previous line.</dd>
|
||
<dt><code><strong>"smart"</strong></code></dt>
|
||
<dd>Use the mode's smart indentation if available, behave
|
||
like <code>"prev"</code> otherwise.</dd>
|
||
<dt><code><strong>"add"</strong></code></dt>
|
||
<dd>Increase the indentation of the line by
|
||
one <a href="#option_indentUnit">indent unit</a>.</dd>
|
||
<dt><code><strong>"subtract"</strong></code></dt>
|
||
<dd>Reduce the indentation of the line.</dd>
|
||
<dt><code><strong><integer></strong></code></dt>
|
||
<dd>Add (positive number) or reduce (negative number) the
|
||
indentation by the given amount of spaces.</dd>
|
||
</dl></dd>
|
||
|
||
<dt id="toggleOverwrite"><code><strong>cm.toggleOverwrite</strong>(?value: bool)</code></dt>
|
||
<dd>Switches between overwrite and normal insert mode (when not
|
||
given an argument), or sets the overwrite mode to a specific
|
||
state (when given an argument).</dd>
|
||
|
||
<dt id="execCommand"><code><strong>cm.execCommand</strong>(name: string)</code></dt>
|
||
<dd>Runs the <a href="#commands">command</a> with the given name on the editor.</dd>
|
||
|
||
<dt id="posFromIndex"><code><strong>doc.posFromIndex</strong>(index: integer) → {line, ch}</code></dt>
|
||
<dd>Calculates and returns a <code>{line, ch}</code> object for a
|
||
zero-based <code>index</code> who's value is relative to the start of the
|
||
editor's text. If the <code>index</code> is out of range of the text then
|
||
the returned object is clipped to start or end of the text
|
||
respectively.</dd>
|
||
<dt id="indexFromPos"><code><strong>doc.indexFromPos</strong>(object: {line, ch}) → integer</code></dt>
|
||
<dd>The reverse of <a href="#posFromIndex"><code>posFromIndex</code></a>.</dd>
|
||
|
||
<dt id="focus"><code><strong>cm.focus</strong>()</code></dt>
|
||
<dd>Give the editor focus.</dd>
|
||
|
||
<dt id="getInputField"><code><strong>cm.getInputField</strong>() → TextAreaElement</code></dt>
|
||
<dd>Returns the hidden textarea used to read input.</dd>
|
||
<dt id="getWrapperElement"><code><strong>cm.getWrapperElement</strong>() → Element</code></dt>
|
||
<dd>Returns the DOM node that represents the editor, and
|
||
controls its size. Remove this from your tree to delete an
|
||
editor instance.</dd>
|
||
<dt id="getScrollerElement"><code><strong>cm.getScrollerElement</strong>() → Element</code></dt>
|
||
<dd>Returns the DOM node that is responsible for the scrolling
|
||
of the editor.</dd>
|
||
<dt id="getGutterElement"><code><strong>cm.getGutterElement</strong>() → Element</code></dt>
|
||
<dd>Fetches the DOM node that contains the editor gutters.</dd>
|
||
</dl>
|
||
|
||
<h3 id="api_static">Static properties</h3>
|
||
<p>The <code>CodeMirror</code> object itself provides
|
||
several useful properties.</p>
|
||
|
||
<dl>
|
||
<dt id="version"><code><strong>CodeMirror.version</strong>: string</code></dt>
|
||
<dd>It contains a string that indicates the version of the
|
||
library. This is a triple of
|
||
integers <code>"major.minor.patch"</code>,
|
||
where <code>patch</code> is zero for releases, and something
|
||
else (usually one) for dev snapshots.</dd>
|
||
|
||
<dt id="fromTextArea"><code><strong>CodeMirror.fromTextArea</strong>(textArea: TextAreaElement, ?config: object)</code></dt>
|
||
<dd>
|
||
The method provides another way to initialize an editor. It
|
||
takes a textarea DOM node as first argument and an optional
|
||
configuration object as second. It will replace the textarea
|
||
with a CodeMirror instance, and wire up the form of that
|
||
textarea (if any) to make sure the editor contents are put
|
||
into the textarea when the form is submitted. The text in the
|
||
textarea will provide the content for the editor. A CodeMirror
|
||
instance created this way has three additional methods:
|
||
<dl>
|
||
<dt id="save"><code><strong>cm.save</strong>()</code></dt>
|
||
<dd>Copy the content of the editor into the textarea.</dd>
|
||
|
||
<dt id="toTextArea"><code><strong>cm.toTextArea</strong>()</code></dt>
|
||
<dd>Remove the editor, and restore the original textarea (with
|
||
the editor's current content).</dd>
|
||
|
||
<dt id="getTextArea"><code><strong>cm.getTextArea</strong>() → TextAreaElement</code></dt>
|
||
<dd>Returns the textarea that the instance was based on.</dd>
|
||
</dl>
|
||
</dd>
|
||
|
||
<dt id="defaults"><code><strong>CodeMirror.defaults</strong>: object</code></dt>
|
||
<dd>An object containing default values for
|
||
all <a href="#config">options</a>. You can assign to its
|
||
properties to modify defaults (though this won't affect editors
|
||
that have already been created).</dd>
|
||
|
||
<dt id="defineExtension"><code><strong>CodeMirror.defineExtension</strong>(name: string, value: any)</code></dt>
|
||
<dd>If you want to define extra methods in terms of the
|
||
CodeMirror API, it is possible to
|
||
use <code>defineExtension</code>. This will cause the given
|
||
value (usually a method) to be added to all CodeMirror instances
|
||
created from then on.</dd>
|
||
|
||
<dt id="defineDocExtension"><code><strong>CodeMirror.defineDocExtension</strong>(name: string, value: any)</code></dt>
|
||
<dd>Like <a href="#defineExtenstion"><code>defineExtension</code></a>,
|
||
but the method will be added to the interface
|
||
for <a href="#Doc"><code>Doc</code></a> objects instead.</dd>
|
||
|
||
<dt id="defineOption"><code><strong>CodeMirror.defineOption</strong>(name: string,
|
||
default: any, updateFunc: function)</code></dt>
|
||
<dd>Similarly, <code>defineOption</code> can be used to define new options for
|
||
CodeMirror. The <code>updateFunc</code> will be called with the
|
||
editor instance and the new value when an editor is initialized,
|
||
and whenever the option is modified
|
||
through <a href="#setOption"><code>setOption</code></a>.</dd>
|
||
|
||
<dt id="defineInitHook"><code><strong>CodeMirror.defineInitHook</strong>(func: function)</code></dt>
|
||
<dd>If your extention just needs to run some
|
||
code whenever a CodeMirror instance is initialized,
|
||
use <code>CodeMirror.defineInitHook</code>. Give it a function as
|
||
its only argument, and from then on, that function will be called
|
||
(with the instance as argument) whenever a new CodeMirror instance
|
||
is initialized.</dd>
|
||
|
||
<dt id="registerHelper"><code><strong>CodeMirror.registerHelper</strong>(type: string, name: string, value: helper)</code></dt>
|
||
<dd>Registers a helper value with the given <code>name</code> in
|
||
the given namespace (<code>type</code>). This is used to define
|
||
functionality that may be looked up by mode. Will create (if it
|
||
doesn't already exist) a property on the <code>CodeMirror</code>
|
||
object for the given <code>type</code>, pointing to an object
|
||
that maps names to values. I.e. after
|
||
doing <code>CodeMirror.registerHelper("hint", "foo",
|
||
myFoo)</code>, the value <code>CodeMirror.hint.foo</code> will
|
||
point to <code>myFoo</code>.</dd>
|
||
|
||
<dt id="registerGlobalHelper"><code><strong>CodeMirror.registerGlobalHelper</strong>(type: string, name: string, predicate: fn(mode, CodeMirror), value: helper)</code></dt>
|
||
<dd>Acts
|
||
like <a href="#registerHelper"><code>registerHelper</code></a>,
|
||
but also registers this helper as 'global', meaning that it will
|
||
be included by <a href="#getHelpers"><code>getHelpers</code></a>
|
||
whenever the given <code>predicate</code> returns true when
|
||
called with the local mode and editor.</dd>
|
||
|
||
<dt id="Pos"><code><strong>CodeMirror.Pos</strong>(line: integer, ?ch: integer)</code></dt>
|
||
<dd>A constructor for the <code>{line, ch}</code> objects that
|
||
are used to represent positions in editor documents.</dd>
|
||
|
||
<dt id="changeEnd"><code><strong>CodeMirror.changeEnd</strong>(change: object) → {line, ch}</code></dt>
|
||
<dd>Utility function that computes an end position from a change
|
||
(an object with <code>from</code>, <code>to</code>,
|
||
and <code>text</code> properties, as passed to
|
||
various <a href="#event_change">event handlers</a>). The
|
||
returned position will be the end of the changed
|
||
range, <em>after</em> the change is applied.</dd>
|
||
</dl>
|
||
</section>
|
||
|
||
<section id=addons>
|
||
<h2>Addons</h2>
|
||
|
||
<p>The <code>addon</code> directory in the distribution contains a
|
||
number of reusable components that implement extra editor
|
||
functionality (on top of extension functions
|
||
like <a href="#defineOption"><code>defineOption</code></a>, <a href="#defineExtension"><code>defineExtension</code></a>,
|
||
and <a href="#registerHelper"><code>registerHelper</code></a>). In
|
||
brief, they are:</p>
|
||
|
||
<dl>
|
||
<dt id="addon_dialog"><a href="../addon/dialog/dialog.js"><code>dialog/dialog.js</code></a></dt>
|
||
<dd>Provides a very simple way to query users for text input.
|
||
Adds the <strong><code>openDialog(template, callback, options) →
|
||
closeFunction</code></strong> method to CodeMirror instances,
|
||
which can be called with an HTML fragment or a detached DOM
|
||
node that provides the prompt (should include an <code>input</code>
|
||
or <code>button</code> tag), and a callback function that is called
|
||
when the user presses enter. It returns a function <code>closeFunction</code>
|
||
which, if called, will close the dialog immediately.
|
||
<strong><code>openDialog</code></strong> takes the following options:
|
||
<dl>
|
||
<dt><code><strong>closeOnEnter</strong></code>:</dt>
|
||
<dd>If true, the dialog will be closed when the user presses
|
||
enter in the input. Defaults to <code>true</code>.</dd>
|
||
<dt><code><strong>onKeyDown</strong></code>:</dt>
|
||
<dd>An event handler of the signature <code>(event, value, closeFunction)</code>
|
||
that will be called whenever <code>keydown</code> fires in the
|
||
dialog's input. If your callback returns <code>true</code>,
|
||
the dialog will not do any further processing of the event.</dd>
|
||
<dt><code><strong>onKeyUp</strong></code>:</dt>
|
||
<dd>Same as <code>onKeyDown</code> but for the
|
||
<code>keyup</code> event.</dd>
|
||
<dt><code><strong>onInput</strong></code>:</dt>
|
||
<dd>Same as <code>onKeyDown</code> but for the
|
||
<code>input</code> event.</dd>
|
||
<dt><code><strong>onClose</strong></code>:</dt>
|
||
<dd>A callback of the signature <code>(dialogInstance)</code>
|
||
that will be called after the dialog has been closed and
|
||
removed from the DOM. No return value.</dd>
|
||
</dl>
|
||
|
||
<p>Also adds an <strong><code>openNotification(template, options) →
|
||
closeFunction</code></strong> function that simply shows an HTML
|
||
fragment as a notification at the top of the editor. It takes a
|
||
single option: <code>duration</code>, the amount of time after
|
||
which the notification will be automatically closed. If <code>
|
||
duration</code> is zero, the dialog will not be closed automatically.</p>
|
||
|
||
<p>Depends on <code>addon/dialog/dialog.css</code>.</p></dd>
|
||
|
||
<dt id="addon_searchcursor"><a href="../addon/search/searchcursor.js"><code>search/searchcursor.js</code></a></dt>
|
||
<dd>Adds the <code>getSearchCursor(query, start, caseFold) →
|
||
cursor</code> method to CodeMirror instances, which can be used
|
||
to implement search/replace functionality. <code>query</code>
|
||
can be a regular expression or a string (only strings will match
|
||
across lines—if they contain newlines). <code>start</code>
|
||
provides the starting position of the search. It can be
|
||
a <code>{line, ch}</code> object, or can be left off to default
|
||
to the start of the document. <code>caseFold</code> is only
|
||
relevant when matching a string. It will cause the search to be
|
||
case-insensitive. A search cursor has the following methods:
|
||
<dl>
|
||
<dt><code><strong>findNext</strong>() → boolean</code></dt>
|
||
<dt><code><strong>findPrevious</strong>() → boolean</code></dt>
|
||
<dd>Search forward or backward from the current position.
|
||
The return value indicates whether a match was found. If
|
||
matching a regular expression, the return value will be the
|
||
array returned by the <code>match</code> method, in case you
|
||
want to extract matched groups.</dd>
|
||
<dt><code><strong>from</strong>() → {line, ch}</code></dt>
|
||
<dt><code><strong>to</strong>() → {line, ch}</code></dt>
|
||
<dd>These are only valid when the last call
|
||
to <code>findNext</code> or <code>findPrevious</code> did
|
||
not return false. They will return <code>{line, ch}</code>
|
||
objects pointing at the start and end of the match.</dd>
|
||
<dt><code><strong>replace</strong>(text: string)</code></dt>
|
||
<dd>Replaces the currently found match with the given text
|
||
and adjusts the cursor position to reflect the
|
||
replacement.</dd>
|
||
</dl></dd>
|
||
|
||
<dt id="addon_search"><a href="../addon/search/search.js"><code>search/search.js</code></a></dt>
|
||
<dd>Implements the search commands. CodeMirror has keys bound to
|
||
these by default, but will not do anything with them unless an
|
||
implementation is provided. Depends
|
||
on <code>searchcursor.js</code>, and will make use
|
||
of <a href="#addon_dialog"><code>openDialog</code></a> when
|
||
available to make prompting for search queries less ugly.</dd>
|
||
|
||
<dt id="addon_matchbrackets"><a href="../addon/edit/matchbrackets.js"><code>edit/matchbrackets.js</code></a></dt>
|
||
<dd>Defines an option <code>matchBrackets</code> which, when set
|
||
to true, causes matching brackets to be highlighted whenever the
|
||
cursor is next to them. It also adds a
|
||
method <code>matchBrackets</code> that forces this to happen
|
||
once, and a method <code>findMatchingBracket</code> that can be
|
||
used to run the bracket-finding algorithm that this uses
|
||
internally.</dd>
|
||
|
||
<dt id="addon_closebrackets"><a href="../addon/edit/closebrackets.js"><code>edit/closebrackets.js</code></a></dt>
|
||
<dd>Defines an option <code>autoCloseBrackets</code> that will
|
||
auto-close brackets and quotes when typed. By default, it'll
|
||
auto-close <code>()[]{}''""</code>, but you can pass it a string
|
||
similar to that (containing pairs of matching characters), or an
|
||
object with <code>pairs</code> and
|
||
optionally <code>explode</code> properties to customize
|
||
it. <code>explode</code> should be a similar string that gives
|
||
the pairs of characters that, when enter is pressed between
|
||
them, should have the second character also moved to its own
|
||
line. <a href="../demo/closebrackets.html">Demo here</a>.</dd>
|
||
|
||
<dt id="addon_matchtags"><a href="../addon/edit/matchtags.js"><code>edit/matchtags.js</code></a></dt>
|
||
<dd>Defines an option <code>matchTags</code> that, when enabled,
|
||
will cause the tags around the cursor to be highlighted (using
|
||
the <code>CodeMirror-matchingtag</code> class). Also
|
||
defines
|
||
a <a href="#commands">command</a> <code>toMatchingTag</code>,
|
||
which you can bind a key to in order to jump to the tag mathing
|
||
the one under the cursor. Depends on
|
||
the <code>addon/fold/xml-fold.js</code>
|
||
addon. <a href="../demo/matchtags.html">Demo here.</a></dd>
|
||
|
||
<dt id="addon_trailingspace"><a href="../addon/edit/trailingspace.js"><code>edit/trailingspace.js</code></a></dt>
|
||
<dd>Adds an option <code>showTrailingSpace</code> which, when
|
||
enabled, adds the CSS class <code>cm-trailingspace</code> to
|
||
stretches of whitespace at the end of lines.
|
||
The <a href="../demo/trailingspace.html">demo</a> has a nice
|
||
squiggly underline style for this class.</dd>
|
||
|
||
<dt id="addon_closetag"><a href="../addon/edit/closetag.js"><code>edit/closetag.js</code></a></dt>
|
||
<dd>Provides utility functions for adding automatic tag closing
|
||
to XML modes. See
|
||
the <a href="../demo/closetag.html">demo</a>.</dd>
|
||
|
||
<dt id="addon_continuelist"><a href="../addon/edit/continuelist.js"><code>edit/continuelist.js</code></a></dt>
|
||
<dd>Markdown specific. Defines
|
||
a <code>"newlineAndIndentContinueMarkdownList"</code> <a href="#commands">command</a>
|
||
command that can be bound to <code>enter</code> to automatically
|
||
insert the leading characters for continuing a list. See
|
||
the <a href="../mode/markdown/index.html">Markdown mode
|
||
demo</a>.</dd>
|
||
|
||
<dt id="addon_comment"><a href="../addon/comment/comment.js"><code>comment/comment.js</code></a></dt>
|
||
<dd>Addon for commenting and uncommenting code. Adds three
|
||
methods to CodeMirror instances:
|
||
<dl>
|
||
<dt id="lineComment"><code><strong>lineComment</strong>(from: {line, ch}, to: {line, ch}, ?options: object)</code></dt>
|
||
<dd>Set the lines in the given range to be line comments. Will
|
||
fall back to <code>blockComment</code> when no line comment
|
||
style is defined for the mode.</dd>
|
||
<dt id="blockComment"><code><strong>blockComment</strong>(from: {line, ch}, to: {line, ch}, ?options: object)</code></dt>
|
||
<dd>Wrap the code in the given range in a block comment. Will
|
||
fall back to <code>lineComment</code> when no block comment
|
||
style is defined for the mode.</dd>
|
||
<dt id="uncomment"><code><strong>uncomment</strong>(from: {line, ch}, to: {line, ch}, ?options: object) → boolean</code></dt>
|
||
<dd>Try to uncomment the given range.
|
||
Returns <code>true</code> if a comment range was found and
|
||
removed, <code>false</code> otherwise.</dd>
|
||
</dl>
|
||
The <code>options</code> object accepted by these methods may
|
||
have the following properties:
|
||
<dl>
|
||
<dt><code>blockCommentStart, blockCommentEnd, blockCommentLead, lineComment: string</code></dt>
|
||
<dd>Override the <a href="#mode_comment">comment string
|
||
properties</a> of the mode with custom comment strings.</dd>
|
||
<dt><code><strong>padding</strong>: string</code></dt>
|
||
<dd>A string that will be inserted after opening and leading
|
||
markers, and before closing comment markers. Defaults to a
|
||
single space.</dd>
|
||
<dt><code><strong>commentBlankLines</strong>: boolean</code></dt>
|
||
<dd>Whether, when adding line comments, to also comment lines
|
||
that contain only whitespace.</dd>
|
||
<dt><code><strong>indent</strong>: boolean</code></dt>
|
||
<dd>When adding line comments and this is turned on, it will
|
||
align the comment block to the current indentation of the
|
||
first line of the block.</dd>
|
||
<dt><code><strong>fullLines</strong>: boolean</code></dt>
|
||
<dd>When block commenting, this controls whether the whole
|
||
lines are indented, or only the precise range that is given.
|
||
Defaults to <code>true</code>.</dd>
|
||
</dl>
|
||
The addon also defines
|
||
a <code>toggleComment</code> <a href="#commands">command</a>,
|
||
which will try to uncomment the current selection, and if that
|
||
fails, line-comments it.</dd>
|
||
|
||
<dt id="addon_foldcode"><a href="../addon/fold/foldcode.js"><code>fold/foldcode.js</code></a></dt>
|
||
<dd>Helps with code folding. Adds a <code>foldCode</code> method
|
||
to editor instances, which will try to do a code fold starting
|
||
at the given line, or unfold the fold that is already present.
|
||
The method takes as first argument the position that should be
|
||
folded (may be a line number or
|
||
a <a href="#Pos"><code>Pos</code></a>), and as second optional
|
||
argument either a range-finder function, or an options object,
|
||
supporting the following properties:
|
||
<dl>
|
||
<dt><code><strong>rangeFinder</strong>: fn(CodeMirror, Pos)</code></dt>
|
||
<dd id="helper_fold_auto">The function that is used to find
|
||
foldable ranges. If this is not directly passed, it will
|
||
default to <code>CodeMirror.fold.auto</code>, which
|
||
uses <a href="#getHelpers"><code>getHelpers</code></a> with
|
||
a <code>"fold"</code> type to find folding functions
|
||
appropriate for the local mode. There are files in
|
||
the <a href="../addon/fold/"><code>addon/fold/</code></a>
|
||
directory providing <code>CodeMirror.fold.brace</code>, which
|
||
finds blocks in brace languages (JavaScript, C, Java,
|
||
etc), <code>CodeMirror.fold.indent</code>, for languages where
|
||
indentation determines block structure (Python, Haskell),
|
||
and <code>CodeMirror.fold.xml</code>, for XML-style languages,
|
||
and <code>CodeMirror.fold.comment</code>, for folding comment
|
||
blocks.</dd>
|
||
<dt><code><strong>widget</strong>: string|Element</code></dt>
|
||
<dd>The widget to show for folded ranges. Can be either a
|
||
string, in which case it'll become a span with
|
||
class <code>CodeMirror-foldmarker</code>, or a DOM node.</dd>
|
||
<dt><code><strong>scanUp</strong>: boolean</code></dt>
|
||
<dd>When true (default is false), the addon will try to find
|
||
foldable ranges on the lines above the current one if there
|
||
isn't an eligible one on the given line.</dd>
|
||
<dt><code><strong>minFoldSize</strong>: integer</code></dt>
|
||
<dd>The minimum amount of lines that a fold should span to be
|
||
accepted. Defaults to 0, which also allows single-line
|
||
folds.</dd>
|
||
</dl>
|
||
See <a href="../demo/folding.html">the demo</a> for an
|
||
example.</dd>
|
||
|
||
<dt id="addon_foldgutter"><a href="../addon/fold/foldgutter.js"><code>fold/foldgutter.js</code></a></dt>
|
||
<dd>Provides an option <code>foldGutter</code>, which can be
|
||
used to create a gutter with markers indicating the blocks that
|
||
can be folded. Create a gutter using
|
||
the <a href="#option_gutters"><code>gutters</code></a> option,
|
||
giving it the class <code>CodeMirror-foldgutter</code> or
|
||
something else if you configure the addon to use a different
|
||
class, and this addon will show markers next to folded and
|
||
foldable blocks, and handle clicks in this gutter. Note that
|
||
CSS styles should be applied to make the gutter, and the fold
|
||
markers within it, visible. A default set of CSS styles are
|
||
available in:
|
||
<a href="../addon/fold/foldgutter.css">
|
||
<code>addon/fold/foldgutter.css</code>
|
||
</a>.
|
||
The option
|
||
can be either set to <code>true</code>, or an object containing
|
||
the following optional option fields:
|
||
<dl>
|
||
<dt><code><strong>gutter</strong>: string</code></dt>
|
||
<dd>The CSS class of the gutter. Defaults
|
||
to <code>"CodeMirror-foldgutter"</code>. You will have to
|
||
style this yourself to give it a width (and possibly a
|
||
background). See the default gutter style rules above.</dd>
|
||
<dt><code><strong>indicatorOpen</strong>: string | Element</code></dt>
|
||
<dd>A CSS class or DOM element to be used as the marker for
|
||
open, foldable blocks. Defaults
|
||
to <code>"CodeMirror-foldgutter-open"</code>.</dd>
|
||
<dt><code><strong>indicatorFolded</strong>: string | Element</code></dt>
|
||
<dd>A CSS class or DOM element to be used as the marker for
|
||
folded blocks. Defaults to <code>"CodeMirror-foldgutter-folded"</code>.</dd>
|
||
<dt><code><strong>rangeFinder</strong>: fn(CodeMirror, Pos)</code></dt>
|
||
<dd>The range-finder function to use when determining whether
|
||
something can be folded. When not
|
||
given, <a href="#helper_fold_auto"><code>CodeMirror.fold.auto</code></a>
|
||
will be used as default.</dd>
|
||
</dl>
|
||
The <code>foldOptions</code> editor option can be set to an
|
||
object to provide an editor-wide default configuration.
|
||
Demo <a href="../demo/folding.html">here</a>.</dd>
|
||
|
||
<dt id="addon_runmode"><a href="../addon/runmode/runmode.js"><code>runmode/runmode.js</code></a></dt>
|
||
<dd>Can be used to run a CodeMirror mode over text without
|
||
actually opening an editor instance.
|
||
See <a href="../demo/runmode.html">the demo</a> for an example.
|
||
There are alternate versions of the file avaible for
|
||
running <a href="../addon/runmode/runmode-standalone.js">stand-alone</a>
|
||
(without including all of CodeMirror) and
|
||
for <a href="../addon/runmode/runmode.node.js">running under
|
||
node.js</a>.</dd>
|
||
|
||
<dt id="addon_colorize"><a href="../addon/runmode/colorize.js"><code>runmode/colorize.js</code></a></dt>
|
||
<dd>Provides a convenient way to syntax-highlight code snippets
|
||
in a webpage. Depends on
|
||
the <a href="#addon_runmode"><code>runmode</code></a> addon (or
|
||
its standalone variant). Provides
|
||
a <code>CodeMirror.colorize</code> function that can be called
|
||
with an array (or other array-ish collection) of DOM nodes that
|
||
represent the code snippets. By default, it'll get
|
||
all <code>pre</code> tags. Will read the <code>data-lang</code>
|
||
attribute of these nodes to figure out their language, and
|
||
syntax-color their content using the relevant CodeMirror mode
|
||
(you'll have to load the scripts for the relevant modes
|
||
yourself). A second argument may be provided to give a default
|
||
mode, used when no language attribute is found for a node. Used
|
||
in this manual to highlight example code.</dd>
|
||
|
||
<dt id="addon_overlay"><a href="../addon/mode/overlay.js"><code>mode/overlay.js</code></a></dt>
|
||
<dd>Mode combinator that can be used to extend a mode with an
|
||
'overlay' — a secondary mode is run over the stream, along with
|
||
the base mode, and can color specific pieces of text without
|
||
interfering with the base mode.
|
||
Defines <code>CodeMirror.overlayMode</code>, which is used to
|
||
create such a mode. See <a href="../demo/mustache.html">this
|
||
demo</a> for a detailed example.</dd>
|
||
|
||
<dt id="addon_multiplex"><a href="../addon/mode/multiplex.js"><code>mode/multiplex.js</code></a></dt>
|
||
<dd>Mode combinator that can be used to easily 'multiplex'
|
||
between several modes.
|
||
Defines <code>CodeMirror.multiplexingMode</code> which, when
|
||
given as first argument a mode object, and as other arguments
|
||
any number of <code>{open, close, mode [, delimStyle, innerStyle]}</code>
|
||
objects, will return a mode object that starts parsing using the
|
||
mode passed as first argument, but will switch to another mode
|
||
as soon as it encounters a string that occurs in one of
|
||
the <code>open</code> fields of the passed objects. When in a
|
||
sub-mode, it will go back to the top mode again when
|
||
the <code>close</code> string is encountered.
|
||
Pass <code>"\n"</code> for <code>open</code> or <code>close</code>
|
||
if you want to switch on a blank line.
|
||
<ul><li>When <code>delimStyle</code> is specified, it will be the token
|
||
style returned for the delimiter tokens.</li>
|
||
<li>When <code>innerStyle</code> is specified, it will be the token
|
||
style added for each inner mode token.</li></ul>
|
||
The outer mode will not see the content between the delimiters.
|
||
See <a href="../demo/multiplex.html">this demo</a> for an
|
||
example.</dd>
|
||
|
||
<dt id="addon_show-hint"><a href="../addon/hint/show-hint.js"><code>hint/show-hint.js</code></a></dt>
|
||
<dd>Provides a framework for showing autocompletion hints.
|
||
Defines <code>editor.showHint</code>, which takes an optional
|
||
options object, and pops up a widget that allows the user to
|
||
select a completion. Finding hints is done with a hinting
|
||
functions (the <code>hint</code> option), which is a function
|
||
that take an editor instance and options object, and return
|
||
a <code>{list, from, to}</code> object, where <code>list</code>
|
||
is an array of strings or objects (the completions),
|
||
and <code>from</code> and <code>to</code> give the start and end
|
||
of the token that is being completed as <code>{line, ch}</code>
|
||
objects.</dd>
|
||
<dd>If no hinting function is given, the addon will
|
||
use <code>CodeMirror.hint.auto</code>, which
|
||
calls <a href="#getHelpers"><code>getHelpers</code></a> with
|
||
the <code>"hint"</code> type to find applicable hinting
|
||
functions, and tries them one by one. If that fails, it looks
|
||
for a <code>"hintWords"</code> helper to fetch a list of
|
||
completable words for the mode, and
|
||
uses <code>CodeMirror.hint.fromList</code> to complete from
|
||
those.</dd>
|
||
<dd>When completions aren't simple strings, they should be
|
||
objects with the following properties:
|
||
<dl>
|
||
<dt><code><strong>text</strong>: string</code></dt>
|
||
<dd>The completion text. This is the only required
|
||
property.</dd>
|
||
<dt><code><strong>displayText</strong>: string</code></dt>
|
||
<dd>The text that should be displayed in the menu.</dd>
|
||
<dt><code><strong>className</strong>: string</code></dt>
|
||
<dd>A CSS class name to apply to the completion's line in the
|
||
menu.</dd>
|
||
<dt><code><strong>render</strong>: fn(Element, self, data)</code></dt>
|
||
<dd>A method used to create the DOM structure for showing the
|
||
completion by appending it to its first argument.</dd>
|
||
<dt><code><strong>hint</strong>: fn(CodeMirror, self, data)</code></dt>
|
||
<dd>A method used to actually apply the completion, instead of
|
||
the default behavior.</dd>
|
||
<dt><code><strong>from</strong>: {line, ch}</code></dt>
|
||
<dd>Optional <code>from</code> position that will be used by <code>pick()</code> instead
|
||
of the global one passed with the full list of completions.</dd>
|
||
<dt><code><strong>to</strong>: {line, ch}</code></dt>
|
||
<dd>Optional <code>to</code> position that will be used by <code>pick()</code> instead
|
||
of the global one passed with the full list of completions.</dd>
|
||
</dl>
|
||
The plugin understands the following options (the options object
|
||
will also be passed along to the hinting function, which may
|
||
understand additional options):
|
||
<dl>
|
||
<dt><code><strong>hint</strong>: function</code></dt>
|
||
<dd>A hinting function, as specified above. It is possible to
|
||
set the <code>async</code> property on a hinting function to
|
||
true, in which case it will be called with
|
||
arguments <code>(cm, callback, ?options)</code>, and the
|
||
completion interface will only be popped up when the hinting
|
||
function calls the callback, passing it the object holding the
|
||
completions.</dd>
|
||
<dt><code><strong>completeSingle</strong>: boolean</code></dt>
|
||
<dd>Determines whether, when only a single completion is
|
||
available, it is completed without showing the dialog.
|
||
Defaults to true.</dd>
|
||
<dt><code><strong>alignWithWord</strong>: boolean</code></dt>
|
||
<dd>Whether the pop-up should be horizontally aligned with the
|
||
start of the word (true, default), or with the cursor (false).</dd>
|
||
<dt><code><strong>closeOnUnfocus</strong>: boolean</code></dt>
|
||
<dd>When enabled (which is the default), the pop-up will close
|
||
when the editor is unfocused.</dd>
|
||
<dt><code><strong>customKeys</strong>: keymap</code></dt>
|
||
<dd>Allows you to provide a custom key map of keys to be active
|
||
when the pop-up is active. The handlers will be called with an
|
||
extra argument, a handle to the completion menu, which
|
||
has <code>moveFocus(n)</code>, <code>setFocus(n)</code>, <code>pick()</code>,
|
||
and <code>close()</code> methods (see the source for details),
|
||
that can be used to change the focused element, pick the
|
||
current element or close the menu. Additionnaly <code>menuSize()</code>
|
||
can give you access to the size of the current dropdown menu,
|
||
<code>length</code> give you the number of availlable completions, and
|
||
<code>data</code> give you full access to the completion returned by the
|
||
hinting function.</dd>
|
||
<dt><code><strong>extraKeys</strong>: keymap</code></dt>
|
||
<dd>Like <code>customKeys</code> above, but the bindings will
|
||
be added to the set of default bindings, instead of replacing
|
||
them.</dd>
|
||
</dl>
|
||
The following events will be fired on the completions object
|
||
during completion:
|
||
<dl>
|
||
<dt><code><strong>"shown"</strong> ()</code></dt>
|
||
<dd>Fired when the pop-up is shown.</dd>
|
||
<dt><code><strong>"select"</strong> (completion, Element)</code></dt>
|
||
<dd>Fired when a completion is selected. Passed the completion
|
||
value (string or object) and the DOM node that represents it
|
||
in the menu.</dd>
|
||
<dt><code><strong>"pick"</strong> (completion)</code></dt>
|
||
<dd>Fired when a completion is picked. Passed the completion value
|
||
(string or object).</dd>
|
||
<dt><code><strong>"close"</strong> ()</code></dt>
|
||
<dd>Fired when the completion is finished.</dd>
|
||
</dl>
|
||
This addon depends on styles
|
||
from <code>addon/hint/show-hint.css</code>. Check
|
||
out <a href="../demo/complete.html">the demo</a> for an
|
||
example.</dd>
|
||
|
||
<dt id="addon_javascript-hint"><a href="../addon/hint/javascript-hint.js"><code>hint/javascript-hint.js</code></a></dt>
|
||
<dd>Defines a simple hinting function for JavaScript
|
||
(<code>CodeMirror.hint.javascript</code>) and CoffeeScript
|
||
(<code>CodeMirror.hint.coffeescript</code>) code. This will
|
||
simply use the JavaScript environment that the editor runs in as
|
||
a source of information about objects and their properties.</dd>
|
||
|
||
<dt id="addon_xml-hint"><a href="../addon/hint/xml-hint.js"><code>hint/xml-hint.js</code></a></dt>
|
||
<dd>Defines <code>CodeMirror.hint.xml</code>, which produces
|
||
hints for XML tagnames, attribute names, and attribute values,
|
||
guided by a <code>schemaInfo</code> option (a property of the
|
||
second argument passed to the hinting function, or the third
|
||
argument passed to <code>CodeMirror.showHint</code>).<br>The
|
||
schema info should be an object mapping tag names to information
|
||
about these tags, with optionally a <code>"!top"</code> property
|
||
containing a list of the names of valid top-level tags. The
|
||
values of the properties should be objects with optional
|
||
properties <code>children</code> (an array of valid child
|
||
element names, omit to simply allow all tags to appear)
|
||
and <code>attrs</code> (an object mapping attribute names
|
||
to <code>null</code> for free-form attributes, and an array of
|
||
valid values for restricted
|
||
attributes). <a href="../demo/xmlcomplete.html">Demo
|
||
here.</a></dd>
|
||
|
||
<dt id="addon_html-hint"><a href="../addon/hint/html-hint.js"><code>hint/html-hint.js</code></a></dt>
|
||
<dd>Provides schema info to
|
||
the <a href="#addon_xml-hint">xml-hint</a> addon for HTML
|
||
documents. Defines a schema
|
||
object <code>CodeMirror.htmlSchema</code> that you can pass to
|
||
as a <code>schemaInfo</code> option, and
|
||
a <code>CodeMirror.hint.html</code> hinting function that
|
||
automatically calls <code>CodeMirror.hint.xml</code> with this
|
||
schema data. See
|
||
the <a href="../demo/html5complete.html">demo</a>.</dd>
|
||
|
||
<dt id="addon_css-hint"><a href="../addon/hint/css-hint.js"><code>hint/css-hint.js</code></a></dt>
|
||
<dd>A hinting function for CSS, SCSS, or LESS code.
|
||
Defines <code>CodeMirror.hint.css</code>.</dd>
|
||
|
||
<dt id="addon_python-hint"><a href="../addon/hint/python-hint.js"><code>hint/python-hint.js</code></a></dt>
|
||
<dd>A very simple hinting function for Python code.
|
||
Defines <code>CodeMirror.hint.python</code>.</dd>
|
||
|
||
<dt id="addon_anyword-hint"><a href="../addon/hint/anyword-hint.js"><code>hint/anyword-hint.js</code></a></dt>
|
||
<dd>A very simple hinting function
|
||
(<code>CodeMirror.hint.anyword</code>) that simply looks for
|
||
words in the nearby code and completes to those. Takes two
|
||
optional options, <code>word</code>, a regular expression that
|
||
matches words (sequences of one or more character),
|
||
and <code>range</code>, which defines how many lines the addon
|
||
should scan when completing (defaults to 500).</dd>
|
||
|
||
<dt id="addon_sql-hint"><a href="../addon/hint/sql-hint.js"><code>hint/sql-hint.js</code></a></dt>
|
||
<dd>A simple SQL hinter. Defines <code>CodeMirror.hint.sql</code>.</dd>
|
||
|
||
<dt id="addon_match-highlighter"><a href="../addon/search/match-highlighter.js"><code>search/match-highlighter.js</code></a></dt>
|
||
<dd>Adds a <code>highlightSelectionMatches</code> option that
|
||
can be enabled to highlight all instances of a currently
|
||
selected word. Can be set either to true or to an object
|
||
containing the following options: <code>minChars</code>, for the
|
||
minimum amount of selected characters that triggers a highlight
|
||
(default 2), <code>style</code>, for the style to be used to
|
||
highlight the matches (default <code>"matchhighlight"</code>,
|
||
which will correspond to CSS
|
||
class <code>cm-matchhighlight</code>),
|
||
and <code>showToken</code> which can be set to <code>true</code>
|
||
or to a regexp matching the characters that make up a word. When
|
||
enabled, it causes the current word to be highlighted when
|
||
nothing is selected (defaults to off).
|
||
Demo <a href="../demo/matchhighlighter.html">here</a>.</dd>
|
||
|
||
<dt id="addon_lint"><a href="../addon/lint/lint.js"><code>lint/lint.js</code></a></dt>
|
||
<dd>Defines an interface component for showing linting warnings,
|
||
with pluggable warning sources
|
||
(see <a href="../addon/lint/json-lint.js"><code>json-lint.js</code></a>,
|
||
<a href="../addon/lint/javascript-lint.js"><code>javascript-lint.js</code></a>,
|
||
and <a href="../addon/lint/css-lint.js"><code>css-lint.js</code></a>
|
||
in the same directory). Defines a <code>lint</code> option that
|
||
can be set to a warning source (for
|
||
example <code>CodeMirror.lint.javascript</code>), or
|
||
to <code>true</code>, in which
|
||
case <a href="#getHelper"><code>getHelper</code></a> with
|
||
type <code>"lint"</code> is used to determined a validator
|
||
function. Depends on <code>addon/lint/lint.css</code>. A demo
|
||
can be found <a href="../demo/lint.html">here</a>.</dd>
|
||
|
||
<dt id="addon_mark-selection"><a href="../addon/selection/mark-selection.js"><code>selection/mark-selection.js</code></a></dt>
|
||
<dd>Causes the selected text to be marked with the CSS class
|
||
<code>CodeMirror-selectedtext</code> when the <code>styleSelectedText</code> option
|
||
is enabled. Useful to change the colour of the selection (in addition to the background),
|
||
like in <a href="../demo/markselection.html">this demo</a>.</dd>
|
||
|
||
<dt id="addon_active-line"><a href="../addon/selection/active-line.js"><code>selection/active-line.js</code></a></dt>
|
||
<dd>Defines a <code>styleActiveLine</code> option that, when enabled,
|
||
gives the wrapper of the active line the class <code>CodeMirror-activeline</code>,
|
||
and adds a background with the class <code>CodeMirror-activeline-background</code>.
|
||
is enabled. See the <a href="../demo/activeline.html">demo</a>.</dd>
|
||
|
||
<dt id="addon_loadmode"><a href="../addon/mode/loadmode.js"><code>mode/loadmode.js</code></a></dt>
|
||
<dd>Defines a <code>CodeMirror.requireMode(modename,
|
||
callback)</code> function that will try to load a given mode and
|
||
call the callback when it succeeded. You'll have to
|
||
set <code>CodeMirror.modeURL</code> to a string that mode paths
|
||
can be constructed from, for
|
||
example <code>"mode/%N/%N.js"</code>—the <code>%N</code>'s will
|
||
be replaced with the mode name. Also
|
||
defines <code>CodeMirror.autoLoadMode(instance, mode)</code>,
|
||
which will ensure the given mode is loaded and cause the given
|
||
editor instance to refresh its mode when the loading
|
||
succeeded. See the <a href="../demo/loadmode.html">demo</a>.</dd>
|
||
|
||
<dt id="addon_continuecomment"><a href="../addon/comment/continuecomment.js"><code>comment/continuecomment.js</code></a></dt>
|
||
<dd>Adds a <code>continueComments</code> option, which sets whether the
|
||
editor will make the next line continue a comment when you press Enter
|
||
inside a comment block. Can be set to a boolean to enable/disable this
|
||
functionality. Set to a string, it will continue comments using a custom
|
||
shortcut. Set to an object, it will use the <code>key</code> property for
|
||
a custom shortcut and the boolean <code>continueLineComment</code>
|
||
property to determine whether single-line comments should be continued
|
||
(defaulting to <code>true</code>).</dd>
|
||
|
||
<dt id="addon_placeholder"><a href="../addon/display/placeholder.js"><code>display/placeholder.js</code></a></dt>
|
||
<dd>Adds a <code>placeholder</code> option that can be used to
|
||
make text appear in the editor when it is empty and not focused.
|
||
Also gives the editor a <code>CodeMirror-empty</code> CSS class
|
||
whenever it doesn't contain any text.
|
||
See <a href="../demo/placeholder.html">the demo</a>.</dd>
|
||
|
||
<dt id="addon_fullscreen"><a href="../addon/display/fullscreen.js"><code>display/fullscreen.js</code></a></dt>
|
||
<dd>Defines an option <code>fullScreen</code> that, when set
|
||
to <code>true</code>, will make the editor full-screen (as in,
|
||
taking up the whole browser window). Depends
|
||
on <a href="../addon/display/fullscreen.css"><code>fullscreen.css</code></a>. <a href="../demo/fullscreen.html">Demo
|
||
here</a>.</dd>
|
||
|
||
<dt id="addon_rulers"><a href="../addon/display/rulers.js"><code>display/rulers.js</code></a></dt>
|
||
<dd>Adds a <code>rulers</code> option, which can be used to show
|
||
one or more vertical rulers in the editor. The option, if
|
||
defined, should be given an array of <code>{column [, className,
|
||
color, lineStyle, width]}</code> objects or numbers (wich
|
||
indicate a column). The ruler will be displayed at the column
|
||
indicated by the number or the <code>column</code> property.
|
||
The <code>className</code> property can be used to assign a
|
||
custom style to a ruler. <a href="../demo/rulers.html">Demo
|
||
here</a>.</dd>
|
||
|
||
<dt id="addon_hardwrap"><a href="../addon/wrap/hardwrap.js"><code>wrap/hardwrap.js</code></a></dt>
|
||
<dd>Addon to perform hard line wrapping/breaking for paragraphs
|
||
of text. Adds these methods to editor instances:
|
||
<dl>
|
||
<dt><code><strong>wrapParagraph</strong>(?pos: {line, ch}, ?options: object)</code></dt>
|
||
<dd>Wraps the paragraph at the given position.
|
||
If <code>pos</code> is not given, it defaults to the cursor
|
||
position.</dd>
|
||
<dt><code><strong>wrapRange</strong>(from: {line, ch}, to: {line, ch}, ?options: object)</code></dt>
|
||
<dd>Wraps the given range as one big paragraph.</dd>
|
||
<dt><code><strong>wrapParagraphsInRange</strong>(from: {line, ch}, to: {line, ch}, ?options: object)</code></dt>
|
||
<dd>Wrapps the paragraphs in (and overlapping with) the
|
||
given range individually.</dd>
|
||
</dl>
|
||
The following options are recognized:
|
||
<dl>
|
||
<dt><code><strong>paragraphStart</strong>, <strong>paragraphEnd</strong>: RegExp</code></dt>
|
||
<dd>Blank lines are always considered paragraph boundaries.
|
||
These options can be used to specify a pattern that causes
|
||
lines to be considered the start or end of a paragraph.</dd>
|
||
<dt><code><strong>column</strong>: number</code></dt>
|
||
<dd>The column to wrap at. Defaults to 80.</dd>
|
||
<dt><code><strong>wrapOn</strong>: RegExp</code></dt>
|
||
<dd>A regular expression that matches only those
|
||
two-character strings that allow wrapping. By default, the
|
||
addon wraps on whitespace and after dash characters.</dd>
|
||
<dt><code><strong>killTrailingSpace</strong>: boolean</code></dt>
|
||
<dd>Whether trailing space caused by wrapping should be
|
||
preserved, or deleted. Defaults to true.</dd>
|
||
</dl>
|
||
A demo of the addon is available <a href="../demo/hardwrap.html">here</a>.
|
||
</dd>
|
||
|
||
<dt id="addon_merge"><a href="../addon/merge/merge.js"><code>merge/merge.js</code></a></dt>
|
||
<dd>Implements an interface for merging changes, using either a
|
||
2-way or a 3-way view. The <code>CodeMirror.MergeView</code>
|
||
constructor takes arguments similar to
|
||
the <a href="#CodeMirror"><code>CodeMirror</code></a>
|
||
constructor, first a node to append the interface to, and then
|
||
an options object. Two extra optional options are
|
||
recognized, <code>origLeft</code> and <code>origRight</code>,
|
||
which may be strings that provide original versions of the
|
||
document, which will be shown to the left and right of the
|
||
editor in non-editable CodeMirror instances. The merge interface
|
||
will highlight changes between the editable document and the
|
||
original(s), and, unless a <code>revertButtons</code> option
|
||
of <code>false</code> is given, show buttons that allow the user
|
||
to revert changes (<a href="../demo/merge.html">demo</a>).</dd>
|
||
|
||
<dt id="addon_tern"><a href="../addon/tern/tern.js"><code>tern/tern.js</code></a></dt>
|
||
<dd>Provides integration with
|
||
the <a href="http://ternjs.net">Tern</a> JavaScript analysis
|
||
engine, for completion, definition finding, and minor
|
||
refactoring help. See the <a href="../demo/tern.html">demo</a>
|
||
for a very simple integration. For more involved scenarios, see
|
||
the comments at the top of
|
||
the <a href="../addon/tern/tern.js">addon</a> and the
|
||
implementation of the
|
||
(multi-file) <a href="http://ternjs.net/doc/demo.html">demonstration
|
||
on the Tern website</a>.</dd>
|
||
</dl>
|
||
</section>
|
||
|
||
<section id=modeapi>
|
||
<h2>Writing CodeMirror Modes</h2>
|
||
|
||
<p>Modes typically consist of a single JavaScript file. This file
|
||
defines, in the simplest case, a lexer (tokenizer) for your
|
||
language—a function that takes a character stream as input,
|
||
advances it past a token, and returns a style for that token. More
|
||
advanced modes can also handle indentation for the language.</p>
|
||
|
||
<p id="defineMode">The mode script should
|
||
call <code><strong>CodeMirror.defineMode</strong></code> to
|
||
register itself with CodeMirror. This function takes two
|
||
arguments. The first should be the name of the mode, for which you
|
||
should use a lowercase string, preferably one that is also the
|
||
name of the files that define the mode (i.e. <code>"xml"</code> is
|
||
defined in <code>xml.js</code>). The second argument should be a
|
||
function that, given a CodeMirror configuration object (the thing
|
||
passed to the <code>CodeMirror</code> function) and an optional
|
||
mode configuration object (as in
|
||
the <a href="#option_mode"><code>mode</code></a> option), returns
|
||
a mode object.</p>
|
||
|
||
<p>Typically, you should use this second argument
|
||
to <code>defineMode</code> as your module scope function (modes
|
||
should not leak anything into the global scope!), i.e. write your
|
||
whole mode inside this function.</p>
|
||
|
||
<p>The main responsibility of a mode script is <em>parsing</em>
|
||
the content of the editor. Depending on the language and the
|
||
amount of functionality desired, this can be done in really easy
|
||
or extremely complicated ways. Some parsers can be stateless,
|
||
meaning that they look at one element (<em>token</em>) of the code
|
||
at a time, with no memory of what came before. Most, however, will
|
||
need to remember something. This is done by using a <em>state
|
||
object</em>, which is an object that is always passed when
|
||
reading a token, and which can be mutated by the tokenizer.</p>
|
||
|
||
<p id="startState">Modes that use a state must define
|
||
a <code><strong>startState</strong></code> method on their mode
|
||
object. This is a function of no arguments that produces a state
|
||
object to be used at the start of a document.</p>
|
||
|
||
<p id="token">The most important part of a mode object is
|
||
its <code><strong>token</strong>(stream, state)</code> method. All
|
||
modes must define this method. It should read one token from the
|
||
stream it is given as an argument, optionally update its state,
|
||
and return a style string, or <code>null</code> for tokens that do
|
||
not have to be styled. For your styles, you are encouraged to use
|
||
the 'standard' names defined in the themes (without
|
||
the <code>cm-</code> prefix). If that fails, it is also possible
|
||
to come up with your own and write your own CSS theme file.<p>
|
||
|
||
<p id="token_style_line">A typical token string would
|
||
be <code>"variable"</code> or <code>"comment"</code>. Multiple
|
||
styles can be returned (separated by spaces), for
|
||
example <code>"string error"</code> for a thing that looks like a
|
||
string but is invalid somehow (say, missing its closing quote).
|
||
When a style is prefixed by <code>"line-"</code>
|
||
or <code>"line-background-"</code>, the style will be applied to
|
||
the whole line, analogous to what
|
||
the <a href="#addLineClass"><code>addLineClass</code></a> method
|
||
does—styling the <code>"text"</code> in the simple case, and
|
||
the <code>"background"</code> element
|
||
when <code>"line-background-"</code> is prefixed.</p>
|
||
|
||
<p id="StringStream">The stream object that's passed
|
||
to <code>token</code> encapsulates a line of code (tokens may
|
||
never span lines) and our current position in that line. It has
|
||
the following API:</p>
|
||
|
||
<dl>
|
||
<dt><code><strong>eol</strong>() → boolean</code></dt>
|
||
<dd>Returns true only if the stream is at the end of the
|
||
line.</dd>
|
||
<dt><code><strong>sol</strong>() → boolean</code></dt>
|
||
<dd>Returns true only if the stream is at the start of the
|
||
line.</dd>
|
||
|
||
<dt><code><strong>peek</strong>() → string</code></dt>
|
||
<dd>Returns the next character in the stream without advancing
|
||
it. Will return an <code>null</code> at the end of the
|
||
line.</dd>
|
||
<dt><code><strong>next</strong>() → string</code></dt>
|
||
<dd>Returns the next character in the stream and advances it.
|
||
Also returns <code>null</code> when no more characters are
|
||
available.</dd>
|
||
|
||
<dt><code><strong>eat</strong>(match: string|regexp|function(char: string) → boolean) → string</code></dt>
|
||
<dd><code>match</code> can be a character, a regular expression,
|
||
or a function that takes a character and returns a boolean. If
|
||
the next character in the stream 'matches' the given argument,
|
||
it is consumed and returned. Otherwise, <code>undefined</code>
|
||
is returned.</dd>
|
||
<dt><code><strong>eatWhile</strong>(match: string|regexp|function(char: string) → boolean) → boolean</code></dt>
|
||
<dd>Repeatedly calls <code>eat</code> with the given argument,
|
||
until it fails. Returns true if any characters were eaten.</dd>
|
||
<dt><code><strong>eatSpace</strong>() → boolean</code></dt>
|
||
<dd>Shortcut for <code>eatWhile</code> when matching
|
||
white-space.</dd>
|
||
<dt><code><strong>skipToEnd</strong>()</code></dt>
|
||
<dd>Moves the position to the end of the line.</dd>
|
||
<dt><code><strong>skipTo</strong>(ch: string) → boolean</code></dt>
|
||
<dd>Skips to the next occurrence of the given character, if
|
||
found on the current line (doesn't advance the stream if the
|
||
character does not occur on the line). Returns true if the
|
||
character was found.</dd>
|
||
<dt><code><strong>match</strong>(pattern: string, ?consume: boolean, ?caseFold: boolean) → boolean</code></dt>
|
||
<dt><code><strong>match</strong>(pattern: regexp, ?consume: boolean) → array<string></code></dt>
|
||
<dd>Act like a
|
||
multi-character <code>eat</code>—if <code>consume</code> is true
|
||
or not given—or a look-ahead that doesn't update the stream
|
||
position—if it is false. <code>pattern</code> can be either a
|
||
string or a regular expression starting with <code>^</code>.
|
||
When it is a string, <code>caseFold</code> can be set to true to
|
||
make the match case-insensitive. When successfully matching a
|
||
regular expression, the returned value will be the array
|
||
returned by <code>match</code>, in case you need to extract
|
||
matched groups.</dd>
|
||
|
||
<dt><code><strong>backUp</strong>(n: integer)</code></dt>
|
||
<dd>Backs up the stream <code>n</code> characters. Backing it up
|
||
further than the start of the current token will cause things to
|
||
break, so be careful.</dd>
|
||
<dt><code><strong>column</strong>() → integer</code></dt>
|
||
<dd>Returns the column (taking into account tabs) at which the
|
||
current token starts.</dd>
|
||
<dt><code><strong>indentation</strong>() → integer</code></dt>
|
||
<dd>Tells you how far the current line has been indented, in
|
||
spaces. Corrects for tab characters.</dd>
|
||
|
||
<dt><code><strong>current</strong>() → string</code></dt>
|
||
<dd>Get the string between the start of the current token and
|
||
the current stream position.</dd>
|
||
</dl>
|
||
|
||
<p id="blankLine">By default, blank lines are simply skipped when
|
||
tokenizing a document. For languages that have significant blank
|
||
lines, you can define
|
||
a <code><strong>blankLine</strong>(state)</code> method on your
|
||
mode that will get called whenever a blank line is passed over, so
|
||
that it can update the parser state.</p>
|
||
|
||
<p id="copyState">Because state object are mutated, and CodeMirror
|
||
needs to keep valid versions of a state around so that it can
|
||
restart a parse at any line, copies must be made of state objects.
|
||
The default algorithm used is that a new state object is created,
|
||
which gets all the properties of the old object. Any properties
|
||
which hold arrays get a copy of these arrays (since arrays tend to
|
||
be used as mutable stacks). When this is not correct, for example
|
||
because a mode mutates non-array properties of its state object, a
|
||
mode object should define
|
||
a <code><strong>copyState</strong></code> method, which is given a
|
||
state and should return a safe copy of that state.</p>
|
||
|
||
<p id="indent">If you want your mode to provide smart indentation
|
||
(through the <a href="#indentLine"><code>indentLine</code></a>
|
||
method and the <code>indentAuto</code>
|
||
and <code>newlineAndIndent</code> commands, to which keys can be
|
||
<a href="#option_extraKeys">bound</a>), you must define
|
||
an <code><strong>indent</strong>(state, textAfter)</code> method
|
||
on your mode object.</p>
|
||
|
||
<p>The indentation method should inspect the given state object,
|
||
and optionally the <code>textAfter</code> string, which contains
|
||
the text on the line that is being indented, and return an
|
||
integer, the amount of spaces to indent. It should usually take
|
||
the <a href="#option_indentUnit"><code>indentUnit</code></a>
|
||
option into account. An indentation method may
|
||
return <code>CodeMirror.Pass</code> to indicate that it
|
||
could not come up with a precise indentation.</p>
|
||
|
||
<p id="mode_comment">To work well with
|
||
the <a href="#addon_comment">commenting addon</a>, a mode may
|
||
define <code><strong>lineComment</strong></code> (string that
|
||
starts a line
|
||
comment), <code><strong>blockCommentStart</strong></code>, <code><strong>blockCommentEnd</strong></code>
|
||
(strings that start and end block comments),
|
||
and <code>blockCommentLead</code> (a string to put at the start of
|
||
continued lines in a block comment). All of these are
|
||
optional.</p>
|
||
|
||
<p id="electricChars">Finally, a mode may define either
|
||
an <code>electricChars</code> or an <code>electricInput</code>
|
||
property, which are used to automatically reindent the line when
|
||
certain patterns are typed and
|
||
the <a href="#option_electricChars"><code>electricChars</code></a>
|
||
option is enabled. <code>electricChars</code> may be a string, and
|
||
will trigger a reindent whenever one of the characters in that
|
||
string are typed. Often, it is more appropriate to
|
||
use <code>electricInput</code>, which should hold a regular
|
||
expression, and will trigger indentation when the part of the
|
||
line <em>before</em> the cursor matches the expression. It should
|
||
usually end with a <code>$</code> character, so that it only
|
||
matches when the indentation-changing pattern was just typed, not when something was
|
||
typed after the pattern.</p>
|
||
|
||
<p>So, to summarize, a mode <em>must</em> provide
|
||
a <code>token</code> method, and it <em>may</em>
|
||
provide <code>startState</code>, <code>copyState</code>,
|
||
and <code>indent</code> methods. For an example of a trivial mode,
|
||
see the <a href="../mode/diff/diff.js">diff mode</a>, for a more
|
||
involved example, see the <a href="../mode/clike/clike.js">C-like
|
||
mode</a>.</p>
|
||
|
||
<p>Sometimes, it is useful for modes to <em>nest</em>—to have one
|
||
mode delegate work to another mode. An example of this kind of
|
||
mode is the <a href="../mode/htmlmixed/htmlmixed.js">mixed-mode HTML
|
||
mode</a>. To implement such nesting, it is usually necessary to
|
||
create mode objects and copy states yourself. To create a mode
|
||
object, there are <code>CodeMirror.getMode(options,
|
||
parserConfig)</code>, where the first argument is a configuration
|
||
object as passed to the mode constructor function, and the second
|
||
argument is a mode specification as in
|
||
the <a href="#option_mode"><code>mode</code></a> option. To copy a
|
||
state object, call <code>CodeMirror.copyState(mode, state)</code>,
|
||
where <code>mode</code> is the mode that created the given
|
||
state.</p>
|
||
|
||
<p id="innerMode">In a nested mode, it is recommended to add an
|
||
extra method, <code><strong>innerMode</strong></code> which, given
|
||
a state object, returns a <code>{state, mode}</code> object with
|
||
the inner mode and its state for the current position. These are
|
||
used by utility scripts such as the <a href="#addon_closetag">tag
|
||
closer</a> to get context information. Use
|
||
the <code>CodeMirror.innerMode</code> helper function to, starting
|
||
from a mode and a state, recursively walk down to the innermost
|
||
mode and state.</p>
|
||
|
||
<p>To make indentation work properly in a nested parser, it is
|
||
advisable to give the <code>startState</code> method of modes that
|
||
are intended to be nested an optional argument that provides the
|
||
base indentation for the block of code. The JavaScript and CSS
|
||
parser do this, for example, to allow JavaScript and CSS code
|
||
inside the mixed-mode HTML mode to be properly indented.</p>
|
||
|
||
<p id="defineMIME">It is possible, and encouraged, to associate
|
||
your mode, or a certain configuration of your mode, with
|
||
a <a href="http://en.wikipedia.org/wiki/MIME">MIME</a> type. For
|
||
example, the JavaScript mode associates itself
|
||
with <code>text/javascript</code>, and its JSON variant
|
||
with <code>application/json</code>. To do this,
|
||
call <code><strong>CodeMirror.defineMIME</strong>(mime,
|
||
modeSpec)</code>, where <code>modeSpec</code> can be a string or
|
||
object specifying a mode, as in
|
||
the <a href="#option_mode"><code>mode</code></a> option.</p>
|
||
|
||
<p>If a mode specification wants to add some properties to the
|
||
resulting mode object, typically for use
|
||
with <a href="#getHelpers"><code>getHelpers</code></a>, it may
|
||
contain a <code>modeProps</code> property, which holds an object.
|
||
This object's properties will be copied to the actual mode
|
||
object.</p>
|
||
|
||
<p id="extendMode">Sometimes, it is useful to add or override mode
|
||
object properties from external code.
|
||
The <code><strong>CodeMirror.extendMode</strong></code> function
|
||
can be used to add properties to mode objects produced for a
|
||
specific mode. Its first argument is the name of the mode, its
|
||
second an object that specifies the properties that should be
|
||
added. This is mostly useful to add utilities that can later be
|
||
looked up through <a href="#getMode"><code>getMode</code></a>.</p>
|
||
</section>
|
||
|
||
</article>
|
||
|
||
<script>setTimeout(function(){CodeMirror.colorize();}, 20);</script>
|