Java tutorial
/******************************************************************************* * Copyright (c) 2011 Wind River Systems, Inc. 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: * William Chen (Wind River)- [345387]Open the remote files with a proper editor *******************************************************************************/ package org.eclipse.tm.te.tcf.filesystem.internal.handlers; import java.io.File; import org.eclipse.compare.CompareUI; import org.eclipse.core.commands.AbstractHandler; import org.eclipse.core.commands.ExecutionEvent; import org.eclipse.core.commands.ExecutionException; import org.eclipse.core.filesystem.EFS; import org.eclipse.core.filesystem.IFileStore; import org.eclipse.core.runtime.IPath; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; import org.eclipse.tm.te.tcf.filesystem.internal.compare.LocalTypedElement; import org.eclipse.tm.te.tcf.filesystem.internal.compare.MergeEditorInput; import org.eclipse.tm.te.tcf.filesystem.internal.compare.RemoteTypedElement; import org.eclipse.tm.te.tcf.filesystem.internal.exceptions.TCFException; import org.eclipse.tm.te.tcf.filesystem.internal.nls.Messages; import org.eclipse.tm.te.tcf.filesystem.model.CacheState; import org.eclipse.tm.te.tcf.filesystem.model.FSTreeNode; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.PartInitException; import org.eclipse.ui.handlers.HandlerUtil; import org.eclipse.ui.ide.FileStoreEditorInput; import org.eclipse.ui.ide.IDE; /** * The action handler to open a file on the remote file system. */ public class OpenFileHandler extends AbstractHandler { /* (non-Javadoc) * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent) */ @Override public Object execute(ExecutionEvent event) throws ExecutionException { IStructuredSelection selection = (IStructuredSelection) HandlerUtil.getCurrentSelectionChecked(event); final FSTreeNode node = (FSTreeNode) selection.getFirstElement(); IWorkbenchPage page = HandlerUtil.getActiveSite(event).getPage(); if (ContentTypeHelper.getInstance().isBinaryFile(node)) { // If the file is a binary file. Shell parent = HandlerUtil.getActiveShell(event); MessageDialog.openWarning(parent, Messages.OpenFileHandler_Warning, Messages.OpenFileHandler_OpeningBinaryNotSupported); } else { // Open the file node. openFile(node, page); } return null; } /** * Open the file node in an editor of the specified workbench page. If the * local cache file of the node is stale, then download it. Then open its * local cache file. * * @param node * The file node to be opened. * @param page * The workbench page in which the editor is opened. */ private void openFile(FSTreeNode node, IWorkbenchPage page) { File file = CacheManager.getInstance().getCacheFile(node); if (!file.exists()) { // If the file node's local cache does not exist yet, download it. boolean successful = CacheManager.getInstance().download(node); if (!successful) { return; } } if (!PersistenceManager.getInstance().isAutoSaving()) { openEditor(page, node); } else { try { StateManager.getInstance().refreshState(node); } catch (TCFException e) { Shell parent = page.getWorkbenchWindow().getShell(); MessageDialog.openError(parent, Messages.StateManager_RefreshFailureTitle, e.getLocalizedMessage()); return; } CacheState state = StateManager.getInstance().getCacheState(node); switch (state) { case consistent: openEditor(page, node); break; case modified: { // If the file node's local cache has been modified, upload it // before open it. boolean successful = CacheManager.getInstance().upload(node); if (successful) openEditor(page, node); } break; case outdated: { // If the file node's local cache does not exist yet, download // it. boolean successful = CacheManager.getInstance().download(node); if (successful) openEditor(page, node); } break; case conflict: { String title = Messages.OpenFileHandler_ConflictingTitle; String message = NLS.bind(Messages.OpenFileHandler_ConflictingMessage, node.name); Shell parent = page.getWorkbenchWindow().getShell(); MessageDialog msgDialog = new MessageDialog(parent, title, null, message, MessageDialog.QUESTION, new String[] { Messages.OpenFileHandler_Merge, Messages.OpenFileHandler_OpenAnyway, Messages.OpenFileHandler_Cancel }, 0); int index = msgDialog.open(); if (index == 0) { LocalTypedElement local = new LocalTypedElement(node); RemoteTypedElement remote = new RemoteTypedElement(node); MergeEditorInput input = new MergeEditorInput(local, remote, page); CompareUI.openCompareDialog(input); } else if (index == 1) { openEditor(page, node); } } break; } } } /** * Open the editor to display the file node in the UI thread. * * @param page * The workbench page in which the editor is opened. * @param node * The file node whose local cache file is opened. */ private void openEditor(final IWorkbenchPage page, final FSTreeNode node) { Display display = page.getWorkbenchWindow().getWorkbench().getDisplay(); display.asyncExec(new Runnable() { @Override public void run() { IPath path = CacheManager.getInstance().getCachePath(node); IFileStore fileStore = EFS.getLocalFileSystem().getStore(path); String editorID = PersistenceManager.getInstance().getPersistentProperties(node) .get(IDE.EDITOR_KEY); try { if (editorID != null) { FileStoreEditorInput input = new FileStoreEditorInput(fileStore); page.openEditor(input, editorID, true, IWorkbenchPage.MATCH_INPUT | IWorkbenchPage.MATCH_ID); } else { IDE.openEditorOnFileStore(page, fileStore); } } catch (PartInitException e) { } } }); } }