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.actions; import java.io.File; import java.util.ArrayList; import net.sf.j2s.ui.Java2ScriptUIPlugin; import org.eclipse.core.filesystem.EFS; import org.eclipse.core.filesystem.IFileStore; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.IWorkspaceRoot; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.Path; import org.eclipse.core.runtime.Platform; import org.eclipse.jdt.core.ICompilationUnit; import org.eclipse.jdt.core.IJavaElement; import org.eclipse.jdt.core.IJavaModel; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.JavaModelException; import org.eclipse.jdt.internal.core.PackageFragmentRoot; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.IEditorDescriptor; import org.eclipse.ui.IEditorInput; import org.eclipse.ui.IEditorRegistry; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.IWorkbenchWindow; import org.eclipse.ui.PartInitException; import org.eclipse.ui.editors.text.EditorsUI; import org.eclipse.ui.ide.FileStoreEditorInput; import org.eclipse.ui.ide.IDE; import org.eclipse.ui.internal.ide.IDEWorkbenchMessages; import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin; import org.eclipse.ui.part.FileEditorInput; /** * @author zhou renjian * * 2006-4-30 */ public class UnitJavaScriptUtil { protected static String getEditorID() { IEditorRegistry editorRegistry = Java2ScriptUIPlugin.getDefault().getWorkbench().getEditorRegistry(); IEditorDescriptor descriptor = editorRegistry.getDefaultEditor("j2s.js", Platform.getContentTypeManager().findContentTypeFor("j2s.js")); String editorID = null; if (descriptor != null) { editorID = descriptor.getId(); } else { editorID = EditorsUI.DEFAULT_TEXT_EDITOR_ID; } return editorID; } public static boolean openEditor(ICompilationUnit unit) { String relativePath = getRelativeJSPath(unit); IJavaModel javaModel = unit.getJavaModel(); File file = new File(javaModel.getResource().getLocation().toOSString(), relativePath); IFile[] files = javaModel.getWorkspace().getRoot() .findFilesForLocation(Path.fromPortableString(relativePath)); IEditorInput editorInput = null; if (files != null && files.length != 0) { editorInput = new FileEditorInput(files[0]); try { Java2ScriptUIPlugin.getDefault().getWorkbench().getActiveWorkbenchWindow().getActivePage() .openEditor(editorInput, getEditorID()); return true; } catch (PartInitException e) { e.printStackTrace(); } } else { IFileStore fileStore = EFS.getLocalFileSystem().getStore(new Path(file.getParent())); fileStore = fileStore.getChild(file.getName()); if (!fileStore.fetchInfo().isDirectory() && fileStore.fetchInfo().exists()) { IWorkbenchWindow fWindow = Java2ScriptUIPlugin.getDefault().getWorkbench() .getActiveWorkbenchWindow(); IWorkbenchPage page = fWindow.getActivePage(); try { // Copy from IDE.openEditorOnFileStore IEditorInput input = getEditorInput(fileStore); String editorId = null; IEditorDescriptor descriptor; try { descriptor = IDE.getEditorDescriptor("java2script.txt"); // text editor if (descriptor != null) editorId = descriptor.getId(); } catch (PartInitException e) { } // open the editor on the file page.openEditor(input, editorId); return true; } catch (PartInitException e) { String msg = NLS.bind(IDEWorkbenchMessages.OpenLocalFileAction_message_errorOnOpen, fileStore.getName()); IDEWorkbenchPlugin.log(msg, e.getStatus()); MessageDialog.openError(fWindow.getShell(), IDEWorkbenchMessages.OpenLocalFileAction_title, msg); } } } return false; } /** * Create the Editor Input appropriate for the given <code>IFileStore</code>. * The result is a normal file editor input if the file exists in the * workspace and, if not, we create a wrapper capable of managing an * 'external' file using its <code>IFileStore</code>. * * @param fileStore * The file store to provide the editor input for * @return The editor input associated with the given file store */ private static IEditorInput getEditorInput(IFileStore fileStore) { IFile workspaceFile = getWorkspaceFile(fileStore); if (workspaceFile != null) return new FileEditorInput(workspaceFile); return new FileStoreEditorInput(fileStore); } /** * Determine whether or not the <code>IFileStore</code> represents a file * currently in the workspace. * * @param fileStore * The <code>IFileStore</code> to test * @return The workspace's <code>IFile</code> if it exists or * <code>null</code> if not */ private static IFile getWorkspaceFile(IFileStore fileStore) { IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot(); IFile[] files = root.findFilesForLocationURI(fileStore.toURI()); files = filterNonExistentFiles(files); if (files == null || files.length == 0) return null; // for now only return the first file return files[0]; } /** * Filter the incoming array of <code>IFile</code> elements by removing * any that do not currently exist in the workspace. * * @param files * The array of <code>IFile</code> elements * @return The filtered array */ private static IFile[] filterNonExistentFiles(IFile[] files) { if (files == null) return null; int length = files.length; ArrayList existentFiles = new ArrayList(length); for (int i = 0; i < length; i++) { if (files[i].exists()) existentFiles.add(files[i]); } return (IFile[]) existentFiles.toArray(new IFile[existentFiles.size()]); } protected static String getRelativeJSPath(ICompilationUnit unit) { if (unit == null) { return null; } IJavaProject javaProject = unit.getJavaProject(); if (javaProject != null) { String relativePath = null; IJavaElement parent = unit.getParent(); while (parent != null) { if (parent instanceof PackageFragmentRoot) { relativePath = unit.getPath().toPortableString() .substring(parent.getPath().toPortableString().length()); break; } parent = parent.getParent(); } IPath outputLocation = null; try { outputLocation = javaProject.getOutputLocation(); } catch (JavaModelException e) { e.printStackTrace(); } if (outputLocation != null && relativePath != null) { relativePath = outputLocation + relativePath.substring(0, relativePath.lastIndexOf('.')) + ".js"; return relativePath; } } return null; } public static boolean isUnitJSExisted(ICompilationUnit unit) { File file = new File(unit.getJavaModel().getResource().getLocation().toOSString(), getRelativeJSPath(unit)); return file.exists(); } public static void popupError() { Shell shell = new Shell(); MessageDialog.openError(shell, "Generated JavaScript", "Error occurs while opening the generated JavaScript file."); } }