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Due to historical reasons, the code is in subfolder "1". With SVN removal, we place the code back and remove the annoying "1" folder.
231 lines
8.3 KiB
HTML
231 lines
8.3 KiB
HTML
<!doctype html>
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<title>CodeMirror: Version 3 upgrade guide</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="../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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<script src="activebookmark.js"></script>
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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>
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<li><a href="manual.html">Manual</a>
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<li><a href="https://github.com/marijnh/codemirror">Code</a>
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</ul>
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<ul>
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<li><a class=active href="#upgrade">Upgrade guide</a>
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<li><a href="#dom">DOM structure</a></li>
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<li><a href="#gutters">Gutter model</a></li>
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<li><a href="#events">Event handling</a></li>
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<li><a href="#marktext">markText method arguments</a></li>
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<li><a href="#folding">Line folding</a></li>
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<li><a href="#lineclass">Line CSS classes</a></li>
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<li><a href="#positions">Position properties</a></li>
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<li><a href="#matchbrackets">Bracket matching</a></li>
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<li><a href="#modes">Mode management</a></li>
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<li><a href="#new">New features</a></li>
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</ul>
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</div>
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<article>
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<h2 id=upgrade>Upgrading to version 3</h2>
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<p>Version 3 does not depart too much from 2.x API, and sites that use
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CodeMirror in a very simple way might be able to upgrade without
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trouble. But it does introduce a number of incompatibilities. Please
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at least skim this text before upgrading.</p>
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<p>Note that <strong>version 3 drops full support for Internet
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Explorer 7</strong>. The editor will mostly work on that browser, but
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it'll be significantly glitchy.</p>
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<section id=dom>
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<h2>DOM structure</h2>
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<p>This one is the most likely to cause problems. The internal
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structure of the editor has changed quite a lot, mostly to implement a
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new scrolling model.</p>
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<p>Editor height is now set on the outer wrapper element (CSS
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class <code>CodeMirror</code>), not on the scroller element
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(<code>CodeMirror-scroll</code>).</p>
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<p>Other nodes were moved, dropped, and added. If you have any code
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that makes assumptions about the internal DOM structure of the editor,
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you'll have to re-test it and probably update it to work with v3.</p>
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<p>See the <a href="manual.html#styling">styling section</a> of the
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manual for more information.</p>
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</section>
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<section id=gutters>
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<h2>Gutter model</h2>
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<p>In CodeMirror 2.x, there was a single gutter, and line markers
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created with <code>setMarker</code> would have to somehow coexist with
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the line numbers (if present). Version 3 allows you to specify an
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array of gutters, <a href="manual.html#option_gutters">by class
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name</a>,
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use <a href="manual.html#setGutterMarker"><code>setGutterMarker</code></a>
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to add or remove markers in individual gutters, and clear whole
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gutters
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with <a href="manual.html#clearGutter"><code>clearGutter</code></a>.
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Gutter markers are now specified as DOM nodes, rather than HTML
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snippets.</p>
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<p>The gutters no longer horizontally scrolls along with the content.
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The <code>fixedGutter</code> option was removed (since it is now the
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only behavior).</p>
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<pre data-lang="text/html">
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<style>
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/* Define a gutter style */
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.note-gutter { width: 3em; background: cyan; }
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</style>
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<script>
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// Create an instance with two gutters -- line numbers and notes
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var cm = new CodeMirror(document.body, {
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gutters: ["note-gutter", "CodeMirror-linenumbers"],
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lineNumbers: true
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});
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// Add a note to line 0
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cm.setGutterMarker(0, "note-gutter", document.createTextNode("hi"));
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</script>
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</pre>
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</section>
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<section id=events>
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<h2>Event handling</h2>
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<p>Most of the <code>onXYZ</code> options have been removed. The same
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effect is now obtained by calling
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the <a href="manual.html#on"><code>on</code></a> method with a string
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identifying the event type. Multiple handlers can now be registered
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(and individually unregistered) for an event, and objects such as line
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handlers now also expose events. See <a href="manual.html#events">the
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full list here</a>.</p>
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<p>(The <code>onKeyEvent</code> and <code>onDragEvent</code> options,
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which act more as hooks than as event handlers, are still there in
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their old form.)</p>
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<pre data-lang="javascript">
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cm.on("change", function(cm, change) {
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console.log("something changed! (" + change.origin + ")");
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});
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</pre>
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</section>
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<section id=marktext>
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<h2>markText method arguments</h2>
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<p>The <a href="manual.html#markText"><code>markText</code></a> method
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(which has gained some interesting new features, such as creating
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atomic and read-only spans, or replacing spans with widgets) no longer
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takes the CSS class name as a separate argument, but makes it an
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optional field in the options object instead.</p>
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<pre data-lang="javascript">
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// Style first ten lines, and forbid the cursor from entering them
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cm.markText({line: 0, ch: 0}, {line: 10, ch: 0}, {
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className: "magic-text",
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inclusiveLeft: true,
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atomic: true
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});
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</pre>
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</section>
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<section id=folding>
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<h2>Line folding</h2>
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<p>The interface for hiding lines has been
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removed. <a href="manual.html#markText"><code>markText</code></a> can
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now be used to do the same in a more flexible and powerful way.</p>
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<p>The <a href="../demo/folding.html">folding script</a> has been
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updated to use the new interface, and should now be more robust.</p>
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<pre data-lang="javascript">
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// Fold a range, replacing it with the text "??"
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var range = cm.markText({line: 4, ch: 2}, {line: 8, ch: 1}, {
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replacedWith: document.createTextNode("??"),
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// Auto-unfold when cursor moves into the range
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clearOnEnter: true
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});
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// Get notified when auto-unfolding
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CodeMirror.on(range, "clear", function() {
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console.log("boom");
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});
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</pre>
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</section>
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<section id=lineclass>
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<h2>Line CSS classes</h2>
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<p>The <code>setLineClass</code> method has been replaced
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by <a href="manual.html#addLineClass"><code>addLineClass</code></a>
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and <a href="manual.html#removeLineClass"><code>removeLineClass</code></a>,
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which allow more modular control over the classes attached to a line.</p>
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<pre data-lang="javascript">
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var marked = cm.addLineClass(10, "background", "highlighted-line");
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setTimeout(function() {
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cm.removeLineClass(marked, "background", "highlighted-line");
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});
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</pre>
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</section>
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<section id=positions>
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<h2>Position properties</h2>
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<p>All methods that take or return objects that represent screen
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positions now use <code>{left, top, bottom, right}</code> properties
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(not always all of them) instead of the <code>{x, y, yBot}</code> used
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by some methods in v2.x.</p>
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<p>Affected methods
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are <a href="manual.html#cursorCoords"><code>cursorCoords</code></a>, <a href="manual.html#charCoords"><code>charCoords</code></a>, <a href="manual.html#coordsChar"><code>coordsChar</code></a>,
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and <a href="manual.html#getScrollInfo"><code>getScrollInfo</code></a>.</p>
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</section>
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<section id=matchbrackets>
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<h2>Bracket matching no longer in core</h2>
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<p>The <a href="manual.html#addon_matchbrackets"><code>matchBrackets</code></a>
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option is no longer defined in the core editor.
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Load <code>addon/edit/matchbrackets.js</code> to enable it.</p>
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</section>
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<section id=modes>
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<h2>Mode management</h2>
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<p>The <code>CodeMirror.listModes</code>
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and <code>CodeMirror.listMIMEs</code> functions, used for listing
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defined modes, are gone. You are now encouraged to simply
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inspect <code>CodeMirror.modes</code> (mapping mode names to mode
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constructors) and <code>CodeMirror.mimeModes</code> (mapping MIME
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strings to mode specs).</p>
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</section>
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<section id=new>
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<h2>New features</h2>
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<p>Some more reasons to upgrade to version 3.</p>
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<ul>
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<li>Bi-directional text support. CodeMirror will now mostly do the
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right thing when editing Arabic or Hebrew text.</li>
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<li>Arbitrary line heights. Using fonts with different heights
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inside the editor (whether off by one pixel or fifty) is now
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supported and handled gracefully.</li>
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<li>In-line widgets. See <a href="../demo/widget.html">the demo</a>
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and <a href="manual.html#addLineWidget">the docs</a>.</li>
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<li>Defining custom options
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with <a href="manual.html#defineOption"><code>CodeMirror.defineOption</code></a>.</li>
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</ul>
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</section>
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</article>
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<script>setTimeout(function(){CodeMirror.colorize();}, 20);</script>
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