Eclipse 插件开发 5.3 编辑器 监听输入

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)

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: lazy

org.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

<?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

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();
		});
	}

}

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