mirror of
https://github.com/renbaoshuo/S2OJ.git
synced 2024-11-10 15:48:43 +00:00
145 lines
5.3 KiB
HTML
145 lines
5.3 KiB
HTML
|
<!doctype html>
|
||
|
|
|
||
|
|
<title>CodeMirror: Version 4 upgrade guide</title>
|
||
|
|
<meta charset="utf-8"/>
|
||
|
|
<link rel=stylesheet href="docs.css">
|
||
|
|
<script src="activebookmark.js"></script>
|
||
|
|
|
||
|
|
<div id=nav>
|
||
|
|
<a href="http://codemirror.net"><img id=logo src="logo.png"></a>
|
||
|
|
|
||
|
|
<ul>
|
||
|
|
<li><a href="../index.html">Home</a>
|
||
|
|
<li><a href="manual.html">Manual</a>
|
||
|
|
<li><a href="https://github.com/marijnh/codemirror">Code</a>
|
||
|
|
</ul>
|
||
|
|
<ul>
|
||
|
|
<li><a class=active href="#upgrade">Upgrade guide</a>
|
||
|
|
<li><a href="#multisel">Multiple selections</a>
|
||
|
|
<li><a href="#beforeSelectionChange">The beforeSelectionChange event</a>
|
||
|
|
<li><a href="#replaceSelection">replaceSelection and collapsing</a>
|
||
|
|
<li><a href="#changeEvent">change event data</a>
|
||
|
|
<li><a href="#showIfHidden">showIfHidden option to line widgets</a>
|
||
|
|
<li><a href="#module">Module loaders</a>
|
||
|
|
<li><a href="#shareddata">Mutating shared data structures</a></li>
|
||
|
|
<li><a href="#deprecated">Deprecated interfaces dropped</a>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<article>
|
||
|
|
|
||
|
|
<h2 id=upgrade>Upgrading to version 4</h2>
|
||
|
|
|
||
|
|
<p>CodeMirror 4's interface is <em>very</em> close version 3, but it
|
||
|
|
does fix a few awkward details in a backwards-incompatible ways. At
|
||
|
|
least skim the text below before upgrading.</p>
|
||
|
|
|
||
|
|
<section id=multisel><h2>Multiple selections</h2>
|
||
|
|
|
||
|
|
<p>The main new feature in version 4 is multiple selections. The
|
||
|
|
single-selection variants of methods are still there, but now
|
||
|
|
typically act only on the <em>primary</em> selection (usually the last
|
||
|
|
one added).</p>
|
||
|
|
|
||
|
|
<p>The exception to this
|
||
|
|
is <a href="manual.html#getSelection"><strong><code>getSelection</code></strong></a>,
|
||
|
|
which will now return the content of <em>all</em> selections
|
||
|
|
(separated by newlines, or whatever <code>lineSep</code> parameter you passed
|
||
|
|
it).</p>
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
<section id=beforeSelectionChange><h2>The beforeSelectionChange event</h2>
|
||
|
|
|
||
|
|
<p>This event still exists, but the object it is passed has
|
||
|
|
a <a href="manual.html#event_beforeSelectionChange">completely new
|
||
|
|
interface</a>, because such changes now concern multiple
|
||
|
|
selections.</p>
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
<section id=replaceSelection><h2>replaceSelection's collapsing behavior</h2>
|
||
|
|
|
||
|
|
<p>By
|
||
|
|
default, <a href="manual.html#replaceSelection"><code>replaceSelection</code></a>
|
||
|
|
would leave the newly inserted text selected. This is only rarely what
|
||
|
|
you want, and also (slightly) more expensive in the new model, so the
|
||
|
|
default was changed to <code>"end"</code>, meaning the old behavior
|
||
|
|
must be explicitly specified by passing a second argument
|
||
|
|
of <code>"around"</code>.</p>
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
<section id=changeEvent><h2>change event data</h2>
|
||
|
|
|
||
|
|
<p>Rather than forcing client code to follow <code>next</code>
|
||
|
|
pointers from one change object to the next, the library will now
|
||
|
|
simply fire
|
||
|
|
multiple <a href="manual.html#event_change"><code>"change"</code></a>
|
||
|
|
events. Existing code will probably continue to work unmodified.</p>
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
<section id=showIfHidden><h2>showIfHidden option to line widgets</h2>
|
||
|
|
|
||
|
|
<p>This option, which conceptually caused line widgets to be visible
|
||
|
|
even if their line was hidden, was never really well-defined, and was
|
||
|
|
buggy from the start. It would be a rather expensive feature, both in
|
||
|
|
code complexity and run-time performance, to implement properly. It
|
||
|
|
has been dropped entirely in 4.0.</p>
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
<section id=module><h2>Module loaders</h2>
|
||
|
|
|
||
|
|
<p>All modules in the CodeMirror distribution are now wrapped in a
|
||
|
|
shim function to make them compatible with both AMD
|
||
|
|
(<a href="http://requirejs.org">requirejs</a>) and CommonJS (as used
|
||
|
|
by <a href="http://nodejs.org/">node</a>
|
||
|
|
and <a href="http://browserify.org/">browserify</a>) module loaders.
|
||
|
|
When neither of these is present, they fall back to simply using the
|
||
|
|
global <code>CodeMirror</code> variable.</p>
|
||
|
|
|
||
|
|
<p>If you have a module loader present in your environment, CodeMirror
|
||
|
|
will attempt to use it, and you might need to change the way you load
|
||
|
|
CodeMirror modules.</p>
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
<section id=shareddata><h2>Mutating shared data structures</h2>
|
||
|
|
|
||
|
|
<p>Data structures produced by the library should not be mutated
|
||
|
|
unless explicitly allowed, in general. This is slightly more strict in
|
||
|
|
4.0 than it was in earlier versions, which copied the position objects
|
||
|
|
returned by <a href="manual.html#getCursor"><code>getCursor</code></a>
|
||
|
|
for nebulous, historic reasons. In 4.0, mutating these
|
||
|
|
objects <em>will</em> corrupt your editor's selection.</p>
|
||
|
|
|
||
|
|
</section>
|
||
|
|
|
||
|
|
<section id=deprecated><h2>Deprecated interfaces dropped</h2>
|
||
|
|
|
||
|
|
<p>A few properties and methods that have been deprecated for a while
|
||
|
|
are now gone. Most notably, the <code>onKeyEvent</code>
|
||
|
|
and <code>onDragEvent</code> options (use the
|
||
|
|
corresponding <a href="manual.html#event_dom">events</a> instead).</p>
|
||
|
|
|
||
|
|
<p>Two silly methods, which were mostly there to stay close to the 0.x
|
||
|
|
API, <code>setLine</code> and <code>removeLine</code> are now gone.
|
||
|
|
Use the more
|
||
|
|
flexible <a href="manual.html#replaceRange"><code>replaceRange</code></a>
|
||
|
|
method instead.</p>
|
||
|
|
|
||
|
|
<p>The long names for folding and completing functions
|
||
|
|
(<code>CodeMirror.braceRangeFinder</code>, <code>CodeMirror.javascriptHint</code>,
|
||
|
|
etc) are also gone
|
||
|
|
(use <code>CodeMirror.fold.brace</code>, <code>CodeMirror.hint.javascript</code>).</p>
|
||
|
|
|
||
|
|
<p>The <code>className</code> property in the return value
|
||
|
|
of <a href="manual.html#getTokenAt"><code>getTokenAt</code></a>, which
|
||
|
|
has been superseded by the <code>type</code> property, is also no
|
||
|
|
longer present.</p>
|
||
|
|
|
||
|
|
</section>
|
||
|
|
</article>
|