Java tutorial
/******************************************************************************* * Copyright (c) 2007 java2script.org 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: * Zhou Renjian - initial API and implementation *******************************************************************************/ package net.sf.j2s.ui.editors; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.IOException; import java.util.Properties; import net.sf.j2s.ui.property.IJ2SConfigModifiedListener; import net.sf.j2s.ui.property.J2SConfigPage; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IMarker; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IResourceChangeEvent; import org.eclipse.core.resources.IResourceChangeListener; import org.eclipse.core.resources.IncrementalProjectBuilder; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.jdt.core.IJavaModel; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jface.dialogs.ErrorDialog; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.StyledText; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.ui.IEditorInput; import org.eclipse.ui.IEditorPart; import org.eclipse.ui.IEditorSite; import org.eclipse.ui.IFileEditorInput; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.PartInitException; import org.eclipse.ui.editors.text.TextEditor; import org.eclipse.ui.ide.IDE; import org.eclipse.ui.part.FileEditorInput; import org.eclipse.ui.part.MultiPageEditorPart; /** * @author zhou renjian * * 2006-2-1 */ /** * An example showing how to create a multi-page editor. * This example has 3 pages: * <ul> * <li>page 0 contains a nested text editor. * <li>page 1 allows you to change the font used in page 2 * <li>page 2 shows the words in page 0 in sorted order * </ul> */ public class J2SConfigEditor extends MultiPageEditorPart implements IResourceChangeListener { /** The text editor used in page 0. */ private TextEditor editor; private boolean lastEnabled; private J2SConfigPage configPage; /** * Creates a multi-page editor example. */ public J2SConfigEditor() { super(); ResourcesPlugin.getWorkspace().addResourceChangeListener(this); } /** * Creates page 0 of the multi-page editor, * which contains a text editor. */ void createPage1() { try { J2STextEditor readOnlyEditor = new J2STextEditor(); int index = addPage(readOnlyEditor, getEditorInput()); editor = readOnlyEditor; setPageText(index, "Source"); } catch (PartInitException e) { ErrorDialog.openError(getSite().getShell(), "Error creating nested text editor", null, e.getStatus()); } } /** * Creates page 1 of the multi-page editor, * which allows you to change the font used in page 2. */ void createPage0() { Composite composite = new Composite(getContainer(), SWT.NONE); GridLayout layout = new GridLayout(); composite.setLayout(layout); layout.numColumns = 2; configPage = new J2SConfigPage(composite, SWT.NONE); configPage.addConfigModifiedListener(new IJ2SConfigModifiedListener() { public void configModified() { Properties oldProps = new Properties(); StyledText textWidget = ((J2STextEditor) editor).getJ2SSourceViewer().getTextWidget(); byte[] bytes = textWidget.getText().getBytes(); try { oldProps.load(new ByteArrayInputStream(bytes)); } catch (IOException e1) { e1.printStackTrace(); } IFile file = (IFile) getEditorInput().getAdapter(IFile.class); Properties props = configPage.getUpdatedProperties(new ByteArrayInputStream(bytes), file.getRawLocation().toFile()); if (!props.equals(oldProps)) { ByteArrayOutputStream os = new ByteArrayOutputStream(); try { props.store(os, "Java2Script Configuration"); } catch (IOException e) { e.printStackTrace(); } textWidget.setText(os.toString()); } } }); int index = addPage(composite); setPageText(index, "Config"); IFile file = (IFile) getEditorInput().getAdapter(IFile.class); if (file != null) { File j2sFile = ResourcesPlugin.getWorkspace().getRoot().getFile(file.getFullPath()).getLocation() .toFile(); configPage.initConfigPage(j2sFile); lastEnabled = configPage.isCompilerEnabled(); } } /** * Creates the pages of the multi-page editor. */ protected void createPages() { createPage0(); createPage1(); setPartName(getEditorInput().getName()); } /** * The <code>MultiPageEditorPart</code> implementation of this * <code>IWorkbenchPart</code> method disposes all nested editors. * Subclasses may extend. */ public void dispose() { ResourcesPlugin.getWorkspace().removeResourceChangeListener(this); super.dispose(); } /** * Saves the multi-page editor's document. */ public void doSave(IProgressMonitor monitor) { getEditor(1).doSave(monitor); IFile file = (IFile) getEditorInput().getAdapter(IFile.class); if (file != null) { IPath path = file.getFullPath(); if (path.segmentCount() == 2 && ".j2s".equals(path.segment(1))) { boolean b = false; if (getActivePage() == 0) { b = configPage.isCompilerEnabled(); } else { Properties props = new Properties(); StyledText textWidget = ((J2STextEditor) editor).getJ2SSourceViewer().getTextWidget(); byte[] bytes = textWidget.getText().getBytes(); try { props.load(new ByteArrayInputStream(bytes)); } catch (IOException e1) { e1.printStackTrace(); } String status = props.getProperty("j2s.compiler.status"); if ("enable".equals(status)) { b = true; } } if (!lastEnabled && b) { IJavaModel javaModel = JavaCore.create(ResourcesPlugin.getWorkspace().getRoot()); String projectName = path.segment(0); if ((projectName == null) || (projectName.trim().length() < 1)) { return; } IJavaProject javaProject = javaModel.getJavaProject(projectName); if ((javaProject == null) || !javaProject.exists()) { return; } IProject project = javaProject.getProject(); try { project.build(IncrementalProjectBuilder.CLEAN_BUILD, monitor); } catch (CoreException e) { e.printStackTrace(); } } lastEnabled = b; } } } /** * Saves the multi-page editor's document as another file. * Also updates the text for page 0's tab, and updates this multi-page editor's input * to correspond to the nested editor's. */ public void doSaveAs() { IEditorPart editor = getEditor(1); editor.doSaveAs(); setPageText(0, editor.getTitle()); setInput(editor.getEditorInput()); } /* (non-Javadoc) * Method declared on IEditorPart */ public void gotoMarker(IMarker marker) { setActivePage(0); IDE.gotoMarker(getEditor(1), marker); } /** * The <code>MultiPageEditorExample</code> implementation of this method * checks that the input is an instance of <code>IFileEditorInput</code>. */ public void init(IEditorSite site, IEditorInput editorInput) throws PartInitException { if (!(editorInput instanceof IFileEditorInput)) throw new PartInitException("Invalid Input: Must be IFileEditorInput"); super.init(site, editorInput); } /* (non-Javadoc) * Method declared on IEditorPart. */ public boolean isSaveAsAllowed() { return true; } /** * Calculates the contents of page 2 when the it is activated. */ protected void pageChange(int newPageIndex) { super.pageChange(newPageIndex); StyledText textWidget = ((J2STextEditor) editor).getJ2SSourceViewer().getTextWidget(); byte[] bytes = textWidget.getText().getBytes(); IFile file = (IFile) getEditorInput().getAdapter(IFile.class); if (newPageIndex == 1) { Properties oldProps = new Properties(); try { oldProps.load(new ByteArrayInputStream(bytes)); } catch (IOException e1) { e1.printStackTrace(); } Properties props = configPage.getUpdatedProperties(new ByteArrayInputStream(bytes), file.getRawLocation().toFile()); if (!props.equals(oldProps)) { ByteArrayOutputStream os = new ByteArrayOutputStream(); try { props.store(os, "Java2Script Configuration"); } catch (IOException e) { e.printStackTrace(); } textWidget.setText(os.toString()); } } else { Properties oldProps = new Properties(); try { oldProps.load(new ByteArrayInputStream(bytes)); } catch (IOException e1) { e1.printStackTrace(); } Properties props = configPage.getUpdatedProperties(new ByteArrayInputStream(bytes), file.getRawLocation().toFile()); if (!props.equals(oldProps)) { configPage.initConfigPage(null, new ByteArrayInputStream(bytes)); } } } /** * Closes all project files on project close. */ public void resourceChanged(final IResourceChangeEvent event) { if (event.getType() == IResourceChangeEvent.PRE_CLOSE) { Display.getDefault().asyncExec(new Runnable() { public void run() { IWorkbenchPage[] pages = getSite().getWorkbenchWindow().getPages(); for (int i = 0; i < pages.length; i++) { if (((FileEditorInput) editor.getEditorInput()).getFile().getProject() .equals(event.getResource())) { IEditorPart editorPart = pages[i].findEditor(editor.getEditorInput()); pages[i].closeEditor(editorPart, true); } } } }); } else if (event.getType() == IResourceChangeEvent.POST_CHANGE) { if (getActivePage() == 0) { Display.getDefault().asyncExec(new Runnable() { public void run() { IFile file = (IFile) getEditorInput().getAdapter(IFile.class); if (file != null) { File j2sFile = ResourcesPlugin.getWorkspace().getRoot().getFile(file.getFullPath()) .getLocation().toFile(); configPage.initConfigPage(j2sFile); } } }); } } } }