multipageeditorcontributor.java

这是用SWT写的一个自定义编辑器的一个小离子

package edit4.editors;

import org.eclipse.jface.action.*;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchActionConstants;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.ActionFactory;

import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.ide.IDEActionFactory;
import org.eclipse.ui.part.MultiPageEditorActionBarContributor;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.ui.texteditor.ITextEditorActionConstants;

import edit4.Myedit.MyEditor;

/**
 * Manages the installation/deinstallation of global actions for multi-page editors.
 * Responsible for the redirection of global actions to the active editor.
 * Multi-page contributor replaces the contributors for the individual editors in the multi-page editor.
 */
public class MultiPageEditorContributor extends MultiPageEditorActionBarContributor {
	private IEditorPart activeEditorPart;
	private Action sampleAction,selectAction;
	public MyEditor textEditor;	
	/**
	 * Creates a multi-page contributor.
	 */
	public MultiPageEditorContributor() {
		super();
		createActions();
	}
	/**
	 * Returns the action registed with the given text editor.
	 * @return IAction or null if editor is null.
	 */
	protected IAction getAction(ITextEditor editor, String actionID) {
		return (editor == null ? null : editor.getAction(actionID));
	}
	/* (non-JavaDoc)
	 * Method declared in AbstractMultiPageEditorActionBarContributor.
	 */

	public void setActivePage(IEditorPart part) {
		if (activeEditorPart == part)
			return;

		activeEditorPart = part;

		IActionBars actionBars = getActionBars();
		if (actionBars != null) {

			ITextEditor editor = (part instanceof ITextEditor) ? (ITextEditor) part : null;

			actionBars.setGlobalActionHandler(
				ActionFactory.DELETE.getId(),
				getAction(editor, ITextEditorActionConstants.DELETE));
			actionBars.setGlobalActionHandler(
				ActionFactory.UNDO.getId(),
				getAction(editor, ITextEditorActionConstants.UNDO));
			actionBars.setGlobalActionHandler(
				ActionFactory.REDO.getId(),
				getAction(editor, ITextEditorActionConstants.REDO));
			actionBars.setGlobalActionHandler(
				ActionFactory.CUT.getId(),
				getAction(editor, ITextEditorActionConstants.CUT));
			actionBars.setGlobalActionHandler(
				ActionFactory.COPY.getId(),
				getAction(editor, ITextEditorActionConstants.COPY));
			actionBars.setGlobalActionHandler(
				ActionFactory.PASTE.getId(),
				getAction(editor, ITextEditorActionConstants.PASTE));
			actionBars.setGlobalActionHandler(
				ActionFactory.SELECT_ALL.getId(),
				getAction(editor, ITextEditorActionConstants.SELECT_ALL));
			actionBars.setGlobalActionHandler(
				ActionFactory.FIND.getId(),
				getAction(editor, ITextEditorActionConstants.FIND));
			actionBars.setGlobalActionHandler(
				IDEActionFactory.BOOKMARK.getId(),
				getAction(editor, IDEActionFactory.BOOKMARK.getId()));
			actionBars.updateActionBars();
		}
	}
	
	
	private void createActions() {
		selectAction = new Action(){
			public void run()
			{
				textEditor= (MyEditor) activeEditorPart;
				IDocument doc 
				= textEditor.getDocumentProvider().getDocument(textEditor.getEditorInput());
			    ITextSelection ts 
			    = (ITextSelection)textEditor.getSelectionProvider().getSelection();
			    
			  		
					String text;
					try {
						text = doc.get(ts.getOffset(),ts.getLength());
						 MessageDialog.openInformation(null, "我选到的文字", text);
					} catch (BadLocationException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
			}
		};
		selectAction.setText("文本选择");
		selectAction.setToolTipText("文本选择");
		selectAction.setImageDescriptor(PlatformUI.getWorkbench().getSharedImages().
				getImageDescriptor(IDE.SharedImages.IMG_OBJ_PROJECT));
	
		sampleAction = new Action() {
			public void run() {
			
				MessageDialog.openInformation(null, "Edit4 Plug-in", "Sample Action Executed");
			}
		};
		sampleAction.setText("Sample Action");
		sampleAction.setToolTipText("Sample Action tool tip");
		sampleAction.setImageDescriptor(PlatformUI.getWorkbench().getSharedImages().
				getImageDescriptor(IDE.SharedImages.IMG_OBJS_TASK_TSK));
	}
	public void contributeToMenu(IMenuManager manager) {
		IMenuManager menu = new MenuManager("Editor &Menu");
		manager.prependToGroup(IWorkbenchActionConstants.MB_ADDITIONS, menu);
		menu.add(sampleAction);
		menu.add(selectAction);
	}
	public void contributeToToolBar(IToolBarManager manager) {
		manager.add(new Separator());
		manager.add(sampleAction);
		manager.add(selectAction);
		
		
	}
	
}