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"Navigating the PSI" and "PSI References" sections

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This commit is contained in:
Dmitry Jemerov 2018-04-17 12:20:12 +02:00
parent d086363559
commit 08a65f735c
3 changed files with 93 additions and 0 deletions
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13
psi_demo.iml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<module type="PLUGIN_MODULE" version="4">
<component name="DevKit.ModuleBuildProperties" url="file://$MODULE_DIR$/resources/META-INF/plugin.xml" />
<component name="NewModuleRootManager" inherit-compiler-output="true">
<exclude-output />
<content url="file://$MODULE_DIR$">
<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
<sourceFolder url="file://$MODULE_DIR$/resources" type="java-resource" />
</content>
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
</component>
</module>

26
resources/META-INF/plugin.xml Normal file
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<idea-plugin>
<id>com.jetbrains.psidemo</id>
<name>PSI demo</name>
<version>1.0</version>
<vendor email="support@yourcompany.com" url="http://www.yourcompany.com">YourCompany</vendor>
<!-- please see http://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/build_number_ranges.html for description -->
<idea-version since-build="173.0"/>
<!-- please see http://www.jetbrains.org/intellij/sdk/docs/basics/getting_started/plugin_compatibility.html
on how to target different products -->
<!-- uncomment to enable plugin in all products
<depends>com.intellij.modules.lang</depends>
-->
<extensions defaultExtensionNs="com.intellij">
<!-- Add your extensions here -->
</extensions>
<actions>
<action class="com.intellij.tutorials.psi.PsiNavigationDemoAction" id="PsiNavigationDemo" text="PSI Navigation Demo...">
<add-to-group group-id="ToolsMenu" anchor="last"/>
</action>
</actions>
</idea-plugin>

54
src/com/intellij/tutorials/psi/PsiNavigationDemoAction.java Normal file
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package com.intellij.tutorials.psi;
import com.intellij.openapi.actionSystem.AnAction;
import com.intellij.openapi.actionSystem.AnActionEvent;
import com.intellij.openapi.actionSystem.CommonDataKeys;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.ui.Messages;
import com.intellij.psi.*;
import com.intellij.psi.util.PsiTreeUtil;
public class PsiNavigationDemoAction extends AnAction {
@Override
public void actionPerformed(AnActionEvent anActionEvent) {
Editor editor = anActionEvent.getData(CommonDataKeys.EDITOR);
PsiFile psiFile = anActionEvent.getData(CommonDataKeys.PSI_FILE);
if (editor == null || psiFile == null) return;
int offset = editor.getCaretModel().getOffset();
final StringBuilder infoBuilder = new StringBuilder();
PsiElement element = psiFile.findElementAt(offset);
infoBuilder.append("Element at caret: ").append(element).append("\n");
if (element != null) {
PsiMethod containingMethod = PsiTreeUtil.getParentOfType(element, PsiMethod.class);
infoBuilder
.append("Containing method: ")
.append(containingMethod != null ? containingMethod.getName() : "none")
.append("\n");
if (containingMethod != null) {
PsiClass containingClass = containingMethod.getContainingClass();
infoBuilder
.append("Containing class: ")
.append(containingClass != null ? containingClass.getName() : "none")
.append("\n");
infoBuilder.append("Local variables:\n");
containingMethod.accept(new JavaRecursiveElementVisitor() {
@Override
public void visitLocalVariable(PsiLocalVariable variable) {
super.visitLocalVariable(variable);
infoBuilder.append(variable.getName()).append("\n");
}
});
}
}
Messages.showMessageDialog(anActionEvent.getProject(), infoBuilder.toString(), "PSI Info", null);
}
@Override
public void update(AnActionEvent e) {
Editor editor = e.getData(CommonDataKeys.EDITOR);
PsiFile psiFile = e.getData(CommonDataKeys.PSI_FILE);
e.getPresentation().setEnabled(editor != null && psiFile != null);
}
}