Java tutorial
/******************************************************************************* * Copyright (c) 2004 - 2005 University Of British Columbia and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * University Of British Columbia - initial API and implementation *******************************************************************************/ /* * Created on Aug 6, 2004 */ package org.eclipse.mylyn.java.ui.editor; import org.eclipse.jdt.core.IImportContainer; import org.eclipse.jdt.core.IImportDeclaration; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.ISourceRange; import org.eclipse.jdt.core.ISourceReference; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.internal.ui.javaeditor.ClassFileEditor; import org.eclipse.jdt.internal.ui.javaeditor.IClassFileEditorInput; import org.eclipse.jface.text.ITextViewerExtension5; import org.eclipse.jface.text.source.ISourceViewer; import org.eclipse.swt.custom.StyledText; import org.eclipse.swt.widgets.Composite; import org.eclipse.ui.IPartService; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.IWorkbenchWindow; import org.eclipse.ui.views.contentoutline.ContentOutline; import org.eclipse.mylyn.core.MylarPlugin; /** * @author Mik Kersten */ public class MylarClassFileEditor extends ClassFileEditor { // private final ActiveFoldingListener FOLDING_LISTENER = new ActiveFoldingListener(this); @Override public void createPartControl(Composite parent) { super.createPartControl(parent); PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() { public void run() { ContextCorePlugin.getTaskscapeManager().addListener(FOLDING_LISTENER); } }); } // EXPOSED METHODS FROM SUPER CLASS, DO NOT MODIFY // ----------------------------------------------- /** * Computes and returns the source reference that includes the caret and * serves as provider for the outline page selection and the editor range * indication. * * @return the computed source reference * @since 3.0 */ @Override protected ISourceReference computeHighlightRangeSourceReference() { ISourceViewer sourceViewer = getSourceViewer(); if (sourceViewer == null) return null; StyledText styledText = sourceViewer.getTextWidget(); if (styledText == null) return null; int caret = 0; if (sourceViewer instanceof ITextViewerExtension5) { ITextViewerExtension5 extension = (ITextViewerExtension5) sourceViewer; caret = extension.widgetOffset2ModelOffset(styledText.getCaretOffset()); } else { int offset = sourceViewer.getVisibleRegion().getOffset(); caret = offset + styledText.getCaretOffset(); } IJavaElement element = getElementAt(caret, false); if (!(element instanceof ISourceReference)) return null; if (element.getElementType() == IJavaElement.IMPORT_DECLARATION) { IImportDeclaration declaration = (IImportDeclaration) element; IImportContainer container = (IImportContainer) declaration.getParent(); ISourceRange srcRange = null; try { srcRange = container.getSourceRange(); } catch (JavaModelException e) { ContextCorePlugin.log(this.getClass().toString(), e); } if (srcRange != null && srcRange.getOffset() == caret) return container; } return (ISourceReference) element; } /** * Synchronizes the outliner selection with the given element * position in the editor. * * @param element the java element to select * @param checkIfOutlinePageActive <code>true</code> if check for active outline page needs to be done */ @Override protected void synchronizeOutlinePage(ISourceReference element, boolean checkIfOutlinePageActive) { if (fOutlinePage != null && element != null && !(checkIfOutlinePageActive && isJavaOutlinePageActive())) { fOutlineSelectionChangedListener.uninstall(fOutlinePage); fOutlinePage.select(element); fOutlineSelectionChangedListener.install(fOutlinePage); } } @Override protected IJavaElement getElementAt(int offset) { if (getEditorInput() instanceof IClassFileEditorInput) { try { IClassFileEditorInput input = (IClassFileEditorInput) getEditorInput(); return input.getClassFile().getElementAt(offset); } catch (JavaModelException e) { ContextCorePlugin.log(this.getClass().toString(), e); } } return null; } private boolean isJavaOutlinePageActive() { IWorkbenchPart part = getActivePart(); return part instanceof ContentOutline && ((ContentOutline) part).getCurrentPage() == fOutlinePage; } private IWorkbenchPart getActivePart() { IWorkbenchWindow window = getSite().getWorkbenchWindow(); IPartService service = window.getPartService(); IWorkbenchPart part = service.getActivePart(); return part; } }