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114 lines
6.5 KiB
HTML
114 lines
6.5 KiB
HTML
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<!doctype html>
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<html lang="en-US">
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<title>Surround With / IntelliJ Platform SDK DevGuide</title>
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<p>© 2000–2016 <a href="//www.jetbrains.com">JetBrains</a> s.r.o.<br>
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<article class="article" data-shortcut-switcher="false">
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<h1>Surround With</h1>
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<p>In order to support the <code class="code highlight language-text">Code | Surround With...</code> action, the plugin needs to register one or more implementations of the
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<a href="https://upsource.jetbrains.com/idea-ce/file/idea-ce-1731d054af4ca27aa827c03929e27eeb0e6a8366/platform/lang-api/src/com/intellij/lang/surroundWith/SurroundDescriptor.java" data-bypass="yes" target="_blank"><span>SurroundDescriptor</span></a>
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interface in the <code class="code highlight language-text">com.intellij.lang.surroundDescriptor</code> extension point.
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Each of the surround descriptors defines a possible type of code fragment which can be surrounded - for example, one surround descriptor can handle surrounding expressions, and another can handle statements.
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Each surround descriptor, in turn, contains an array of
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<a href="https://upsource.jetbrains.com/idea-ce/file/idea-ce-1731d054af4ca27aa827c03929e27eeb0e6a8366/platform/lang-api/src/com/intellij/lang/surroundWith/Surrounder.java" data-bypass="yes" target="_blank"><span>Surrounder</span></a>
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objects, defining specific templates which can be used for surrounding the selected code fragment (for example, <code class="code highlight language-text">Surround With if</code>, <code class="code highlight language-text">Surround With for</code> and so on).</p>
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<p>When the <code class="code highlight language-text">Surround With...</code> action is invoked, the IDE queries all surround descriptors for the language until it finds one that returns a non-empty array from its <code class="code highlight language-text">getElementsToSurround()</code> method.
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Then it calls the
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<a href="https://upsource.jetbrains.com/idea-ce/file/idea-ce-1731d054af4ca27aa827c03929e27eeb0e6a8366/platform/lang-api/src/com/intellij/lang/surroundWith/Surrounder.java" data-bypass="yes" target="_blank"><span>Surrounder.isApplicable()</span></a><!--#L46-->
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method for each surrounder in that descriptor to check if the specific template is applicable in the current context.
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Once the user selects a specific surrounder from the popup menu, the
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<a href="https://upsource.jetbrains.com/idea-ce/file/idea-ce-1731d054af4ca27aa827c03929e27eeb0e6a8366/platform/lang-api/src/com/intellij/lang/surroundWith/Surrounder.java" data-bypass="yes" target="_blank"><span>Surrounder.surroundElements()</span></a><!--#L57-->
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method is used to execute the surround action.</p>
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<div class="last-modified">
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Last modified: 21 December 2015
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