Java tutorial
/* * Copyright (c) 2012, the Dart project authors. * * Licensed under the Eclipse Public License v1.0 (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * http://www.eclipse.org/legal/epl-v10.html * * Unless required by applicable law or agreed to in writing, software distributed under the License * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express * or implied. See the License for the specific language governing permissions and limitations under * the License. */ package com.google.dart.tools.ui.internal.preferences; import com.google.dart.tools.core.DartCoreDebug; import com.google.dart.tools.ui.DartToolsPlugin; import com.google.dart.tools.ui.Messages; import com.google.dart.tools.ui.internal.util.ExceptionHandler; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.Platform; import org.eclipse.core.runtime.content.IContentType; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.layout.LayoutConstants; import org.eclipse.jface.preference.PreferencePage; import org.eclipse.jface.util.Geometry; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Label; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; import org.eclipse.ui.activities.IActivityManager; import org.eclipse.ui.commands.ICommandService; import org.eclipse.ui.keys.IBindingService; import java.io.File; // TODO verify .savepath public class DartKeyBindingPreferencePage extends PreferencePage implements IWorkbenchPreferencePage { private static final String EXT_XML = ".xml"; //$NON-NLS-1$ private static final String ALL_XML_FILES = "*" + EXT_XML; //$NON-NLS-1$ private static final String ALL_FILES = "*.*"; //$NON-NLS-1$ private static final String ENCODING = "UTF-8"; //$NON-NLS-1$ private static final String LAST_KEY_PATH = "com.google.dart.tools.ui.prefs.key.path"; //$NON-NLS-1$ private static final String SAVE_PATH = ".savepath"; //$NON-NLS-1$ // currently using same previous entry for both import & export private static final String DESCR_EXPORT = PreferencesMessages.DartKeyBindingPref_Export; private static final String DESCR_IMPORT = PreferencesMessages.DartKeyBindingPref_Import; private static final String DESCR_RESET = PreferencesMessages.DartKeyBindingPref_Reset; private static final String DESCR_EMACS = PreferencesMessages.DartKeyBindingPref_Emacs; private Button exportButton; private Button importButton; private Button resetButton; private IActivityManager activityManager; private IBindingService bindingService; private ICommandService commandService; private Button emacsButton; public DartKeyBindingPreferencePage() { setPreferenceStore(DartToolsPlugin.getDefault().getPreferenceStore()); noDefaultAndApplyButton(); } @Override public void init(IWorkbench workbench) { activityManager = workbench.getActivitySupport().getActivityManager(); bindingService = (IBindingService) workbench.getService(IBindingService.class); commandService = (ICommandService) workbench.getService(ICommandService.class); } @Override protected Control createContents(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); GridDataFactory.fillDefaults().grab(true, false).indent(0, 10).align(SWT.FILL, SWT.BEGINNING) .applyTo(composite); GridLayoutFactory.fillDefaults().spacing(0, 8).margins(0, 10).applyTo(composite); Group generalGroup = new Group(composite, SWT.NONE); generalGroup.setText(PreferencesMessages.DartKeyBindingPref_Modify); GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.BEGINNING).applyTo(generalGroup); GridLayoutFactory.fillDefaults().numColumns(1).margins(8, 8).applyTo(generalGroup); new Label(generalGroup, SWT.NONE).setText(DESCR_EXPORT); exportButton = new Button(generalGroup, SWT.PUSH | SWT.FLAT | SWT.CENTER); exportButton.setText(PreferencesMessages.DartKeyBindingPref_ToFile); exportButton.setLayoutData(new GridData(SWT.CENTER, SWT.END, false, false)); exportButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { exportKeys(); } }); new Label(generalGroup, SWT.NONE).setText(DESCR_IMPORT); importButton = new Button(generalGroup, SWT.PUSH | SWT.FLAT | SWT.CENTER); importButton.setText(PreferencesMessages.DartKeyBindingPref_FromFile); importButton.setLayoutData(new GridData(SWT.CENTER, SWT.END, false, false)); importButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { importKeys(); } }); new Label(generalGroup, SWT.NONE).setText(DESCR_RESET); resetButton = new Button(generalGroup, SWT.PUSH | SWT.FLAT | SWT.CENTER); resetButton.setText(PreferencesMessages.DartKeyBindingPref_ToDefaults); resetButton.setLayoutData(new GridData(SWT.CENTER, SWT.END, false, false)); resetButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { resetBindings(); } }); if (DartCoreDebug.ENABLE_ALT_KEY_BINDINGS) { new Label(generalGroup, SWT.NONE).setText(DESCR_EMACS); emacsButton = new Button(generalGroup, SWT.PUSH | SWT.FLAT | SWT.CENTER); emacsButton.setText(PreferencesMessages.DartKeyBindingPref_ToEmacs); emacsButton.setLayoutData(new GridData(SWT.CENTER, SWT.END, false, false)); emacsButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { setEmacsBindings(); } }); } Point preferredSize = resetButton.computeSize(SWT.DEFAULT, SWT.DEFAULT, false); Point hint = Geometry.max(LayoutConstants.getMinButtonSize(), preferredSize); GridDataFactory.fillDefaults().align(SWT.CENTER, SWT.CENTER).hint(hint).applyTo(exportButton); GridDataFactory.fillDefaults().align(SWT.CENTER, SWT.CENTER).hint(hint).applyTo(importButton); GridDataFactory.fillDefaults().align(SWT.CENTER, SWT.CENTER).hint(hint).applyTo(resetButton); if (DartCoreDebug.ENABLE_ALT_KEY_BINDINGS) { GridDataFactory.fillDefaults().align(SWT.CENTER, SWT.CENTER).hint(hint).applyTo(emacsButton); } return composite; } private void exportKeys() { String path = requestFilePath(SWT.SAVE, PreferencesMessages.DartKeyBindingPref_ChooseExportFile, SAVE_PATH); if (path == null) { return; } File file = new File(path); if (file.exists() && !MessageDialog.openQuestion(getShell(), PreferencesMessages.DartKeyBindingPref_ExportTitle, Messages.format(PreferencesMessages.DartKeyBindingPref_ConfirmReplace, file.getAbsolutePath()))) { return; } try { DartKeyBindingPersistence persist; persist = new DartKeyBindingPersistence(activityManager, bindingService, commandService); persist.writeFile(file, getEncoding()); } catch (CoreException ex) { String title = PreferencesMessages.DartKeyBindingPref_ExportTitle; String message = PreferencesMessages.DartKeyBindingPref_CouldNotExport; ExceptionHandler.handle(ex, getShell(), title, message); } } private String getEncoding() { String encoding = ENCODING; IContentType type = Platform.getContentTypeManager() .getContentType("com.google.dart.tools.core.runtime.xml"); //$NON-NLS-1$ if (type != null) { encoding = type.getDefaultCharset(); } return encoding; } private void importKeys() { String path = requestFilePath(SWT.OPEN, PreferencesMessages.DartKeyBindingPref_ChooseImportFile, SAVE_PATH); if (path == null) { return; } File file = new File(path); if (!(file.exists() && file.canRead())) { MessageDialog.openError(getShell(), PreferencesMessages.DartKeyBindingPref_ImportTitle, Messages.format(PreferencesMessages.DartKeyBindingPref_FileReadError, file.getAbsolutePath())); return; } try { DartKeyBindingPersistence persist; persist = new DartKeyBindingPersistence(activityManager, bindingService, commandService); persist.readFile(file, getEncoding()); } catch (Exception ex) { MessageDialog.openError(getShell(), PreferencesMessages.DartKeyBindingPref_ImportTitle, Messages.format(PreferencesMessages.DartKeyBindingPref_CouldNotLoad, new Object[] { file.getAbsolutePath(), ex.getMessage() == null ? ex.getClass().getCanonicalName() : ex.getMessage() })); } } private String requestFilePath(int mode, String prompt, String keySuffix) { FileDialog file = new FileDialog(getShell(), mode); file.setText(PreferencesMessages.DartKeyBindingPref_ChooseFile); file.setFilterNames(new String[] { ALL_XML_FILES, ALL_FILES }); file.setFilterExtensions(new String[] { ALL_XML_FILES, ALL_FILES }); String lastPath = DartToolsPlugin.getDefault().getDialogSettings().get(LAST_KEY_PATH + keySuffix); if (lastPath != null) { file.setFilterPath(lastPath); } String path = file.open(); if (path != null) { if (!path.endsWith(EXT_XML)) { path = path + EXT_XML; } DartToolsPlugin.getDefault().getDialogSettings().put(LAST_KEY_PATH + SAVE_PATH, file.getFilterPath()); return path; } return null; } private void resetBindings() { if (!MessageDialog.openQuestion(getShell(), PreferencesMessages.DartKeyBindingPref_ResetBindings, PreferencesMessages.DartKeyBindingPref_ConfirmReset)) { return; } try { DartKeyBindingPersistence persist; persist = new DartKeyBindingPersistence(activityManager, bindingService, commandService); persist.resetBindings(); } catch (CoreException ex) { DartToolsPlugin.log(ex); } } private void setEmacsBindings() { // TODO see DartCoreDebug.ENABLE_ALT_KEY_BINDINGS MessageDialog.openInformation(getShell(), "Not Implemented", //$NON-NLS-1$ "Emacs bindings are not defined yet."); //$NON-NLS-1$ } }