Eclipse 插件开发 5.3 编辑器监 听输入
- [1 插件配置](#1 插件配置)
- [2 添加监听](#2 添加监听)
- [3 查看效果](#3 查看效果)
java
Manifest-Version: 1.0
Bundle-ManifestVersion: 2
Bundle-Name: Click1
Bundle-SymbolicName: com.xu.click1;singleton:=true
Bundle-Version: 1.0.0
Bundle-Activator: com.xu.click1.Activator
Bundle-Vendor: XU
Require-Bundle: org.eclipse.ui,
org.eclipse.core.runtime,
org.eclipse.ui.editors,
org.eclipse.ui.workbench.texteditor,
org.eclipse.core.resources,
org.eclipse.text
Bundle-RequiredExecutionEnvironment: JavaSE-24
Automatic-Module-Name: com.xu.click1
Bundle-ActivationPolicy: lazyorg.eclipse.ui.IStartup 是 Eclipse 插件开发中用于在 工作台启动时自动执行代码 的接口。
org.eclipse.ui.IStartup 适用于以下场景：
1、启动时注册监听器（如监听编辑器、视图、资源等）
2、启动时预加载某些资源或服务
3、提前初始化你的插件逻辑
4、注册全局快捷键、UI 元素等
IStartup 注意事项
| 注意点 | 说明 |
|---|---|
| UI 操作必须放在 UI 线程中 | 使用 Display.getDefault().asyncExec(...) |
插件必须在 plugin.xml 中注册扩展点 |
否则 earlyStartup() 不会执行 |
不要阻塞 earlyStartup() |
否则会影响 Eclipse 启动速度 |
IStartup 常见用途示例
| 用途 | 说明 |
|---|---|
| 自动附加文档监听器 | 监听所有打开的 ITextEditor 并获取实时输入 |
| 注册资源监听器 | 监听项目、文件变化 |
| 注册窗口、视图、编辑器监听器 | 管理 UI 生命周期 |
| 初始化日志系统、缓存等 | 提前准备插件运行环境 |
1 插件配置
java
<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
<extension point="org.eclipse.ui.startup">
<startup class="com.xu.click1.StartupListener" />
</extension>
</plugin>2 添加监听
java
package com.xu.click1;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.IStartup;
import com.xu.edit.EditUtil;
public class StartupListener implements IStartup {
@Override
public void earlyStartup() {
Display.getDefault().asyncExec(() -> {
new EditUtil().addEditListener();
});
}
}
java
package com.xu.edit;
import org.eclipse.jface.text.DocumentEvent;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IDocumentListener;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorReference;
import org.eclipse.ui.IPartListener2;
import org.eclipse.ui.IPartService;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchPartReference;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.texteditor.IDocumentProvider;
import org.eclipse.ui.texteditor.ITextEditor;
public class EditUtil {
public void addEditListener() {
IWorkbench workbench = PlatformUI.getWorkbench();
oldEditListener(workbench);
newEditListener(workbench);
}
private void oldEditListener(IWorkbench workbench) {
if (null == workbench) {
return;
}
IWorkbenchWindow window = workbench.getActiveWorkbenchWindow();
if (null == window) {
return;
}
IWorkbenchPage page = window.getActivePage();
if (null == page) {
return;
}
for (IEditorReference ref : page.getEditorReferences()) {
IEditorPart editor = ref.getEditor(true);
if (null == editor) {
continue;
}
addListener((ITextEditor) editor);
}
}
private void addListener(ITextEditor editor) {
if (null == editor) {
return;
}
IDocumentProvider provider = editor.getDocumentProvider();
IDocument document = provider.getDocument(editor.getEditorInput());
document.addDocumentListener(new IDocumentListener() {
@Override
public void documentAboutToBeChanged(DocumentEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void documentChanged(DocumentEvent arg0) {
// TODO Auto-generated method stub
System.out.println(String.format("%s:%s", arg0.getOffset(), arg0.getText()));
}
});
}
private void newEditListener(IWorkbench workbench) {
if (null == workbench) {
return;
}
for (IWorkbenchWindow window : workbench.getWorkbenchWindows()) {
if (window == null) {
continue;
}
IPartService service = window.getPartService();
if (null == service) {
continue;
}
service.addPartListener(new IPartListener2() {
@Override
public void partOpened(IWorkbenchPartReference partRef) {
IWorkbenchPart part = partRef.getPart(false);
if (part instanceof ITextEditor) {
addListener((ITextEditor) part);
}
}
});
}
}
}3 查看效果
