Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2013 IBM Corporation 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: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.ant.internal.ui.preferences; import java.util.ArrayList; import java.util.List; import org.eclipse.ant.internal.ui.AntSourceViewerConfiguration; import org.eclipse.ant.internal.ui.IAntUIHelpContextIds; import org.eclipse.ant.internal.ui.editor.formatter.FormattingPreferences; import org.eclipse.ant.internal.ui.editor.formatter.XmlFormatter; import org.eclipse.ant.internal.ui.editor.text.AntDocumentSetupParticipant; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.text.Document; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.source.SourceViewer; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Label; import org.eclipse.ui.editors.text.EditorsUI; import org.eclipse.ui.texteditor.ChainedPreferenceStore; /* * The page to configure the code formatter options. */ public class AntCodeFormatterPreferencePage extends AbstractAntEditorPreferencePage { private SourceViewer fPreviewViewer; private AntPreviewerUpdater fPreviewerUpdater; @Override protected OverlayPreferenceStore createOverlayStore() { List<OverlayPreferenceStore.OverlayKey> overlayKeys = new ArrayList<>(); overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, AntEditorPreferenceConstants.FORMATTER_WRAP_LONG)); overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, AntEditorPreferenceConstants.FORMATTER_ALIGN)); overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.INT, AntEditorPreferenceConstants.FORMATTER_MAX_LINE_LENGTH)); overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.BOOLEAN, AntEditorPreferenceConstants.FORMATTER_TAB_CHAR)); overlayKeys.add(new OverlayPreferenceStore.OverlayKey(OverlayPreferenceStore.INT, AntEditorPreferenceConstants.FORMATTER_TAB_SIZE)); OverlayPreferenceStore.OverlayKey[] keys = new OverlayPreferenceStore.OverlayKey[overlayKeys.size()]; overlayKeys.toArray(keys); return new OverlayPreferenceStore(getPreferenceStore(), keys); } @Override protected Control createContents(Composite parent) { initializeDialogUnits(parent); getOverlayStore().load(); getOverlayStore().start(); int numColumns = 2; Composite result = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; result.setLayout(layout); Group indentationGroup = createGroup(numColumns, result, AntPreferencesMessages.AntCodeFormatterPreferencePage_0); String labelText = AntPreferencesMessages.AntCodeFormatterPreferencePage_1; String[] errorMessages = new String[] { AntPreferencesMessages.AntCodeFormatterPreferencePage_2, AntPreferencesMessages.AntCodeFormatterPreferencePage_3 }; addTextField(indentationGroup, labelText, AntEditorPreferenceConstants.FORMATTER_TAB_SIZE, 3, 0, errorMessages); labelText = AntPreferencesMessages.AntCodeFormatterPreferencePage_4; addCheckBox(indentationGroup, labelText, AntEditorPreferenceConstants.FORMATTER_TAB_CHAR, 1); Group wrappingGroup = createGroup(numColumns, result, AntPreferencesMessages.AntCodeFormatterPreferencePage_6); labelText = AntPreferencesMessages.AntCodeFormatterPreferencePage_7; errorMessages = new String[] { AntPreferencesMessages.AntCodeFormatterPreferencePage_8, AntPreferencesMessages.AntCodeFormatterPreferencePage_9 }; addTextField(wrappingGroup, labelText, AntEditorPreferenceConstants.FORMATTER_MAX_LINE_LENGTH, 3, 0, errorMessages); labelText = AntPreferencesMessages.AntCodeFormatterPreferencePage_10; addCheckBox(wrappingGroup, labelText, AntEditorPreferenceConstants.FORMATTER_WRAP_LONG, 1); labelText = AntPreferencesMessages.AntCodeFormatterPreferencePage_5; addCheckBox(wrappingGroup, labelText, AntEditorPreferenceConstants.FORMATTER_ALIGN, 1); Label label = new Label(result, SWT.LEFT); label.setText(AntPreferencesMessages.AntEditorPreferencePage_9); label.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); Control previewer = createPreviewer(result); GridData gd = new GridData(GridData.FILL_BOTH); gd.widthHint = convertWidthInCharsToPixels(20); gd.heightHint = convertHeightInCharsToPixels(5); previewer.setLayoutData(gd); initializeFields(); applyDialogFont(result); return result; } /** * Convenience method to create a group */ private Group createGroup(int numColumns, Composite parent, String text) { final Group group = new Group(parent, SWT.NONE); GridData gd = new GridData(GridData.FILL_HORIZONTAL); gd.horizontalSpan = numColumns; gd.widthHint = 0; group.setLayoutData(gd); group.setFont(parent.getFont()); final GridLayout layout = new GridLayout(numColumns, false); group.setLayout(layout); group.setText(text); return group; } private Control createPreviewer(Composite parent) { fPreviewViewer = new SourceViewer(parent, null, null, false, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL); AntSourceViewerConfiguration configuration = new AntSourceViewerConfiguration(); fPreviewViewer.configure(configuration); fPreviewViewer.setEditable(false); Font font = JFaceResources.getFont(JFaceResources.TEXT_FONT); fPreviewViewer.getTextWidget().setFont(font); IPreferenceStore store = new ChainedPreferenceStore( new IPreferenceStore[] { getOverlayStore(), EditorsUI.getPreferenceStore() }); fPreviewerUpdater = new AntPreviewerUpdater(fPreviewViewer, configuration, store); String content = loadPreviewContentFromFile("FormatPreviewCode.txt"); //$NON-NLS-1$ content = formatContent(content, store); IDocument document = new Document(content); new AntDocumentSetupParticipant().setup(document); fPreviewViewer.setDocument(document); return fPreviewViewer.getControl(); } private String formatContent(String content, IPreferenceStore preferenceStore) { FormattingPreferences prefs = new FormattingPreferences(); prefs.setPreferenceStore(preferenceStore); return XmlFormatter.format(content, prefs); } /* * (non-Javadoc) * * @see org.eclipse.ant.internal.ui.preferences.AbstractAntEditorPreferencePage#handleDefaults() */ @Override protected void handleDefaults() { // do nothing } /* * (non-Javadoc) * * @see org.eclipse.jface.dialogs.IDialogPage#dispose() */ @Override public void dispose() { super.dispose(); if (fPreviewerUpdater != null) { fPreviewerUpdater.dispose(); } } /* * (non-Javadoc) * * @see org.eclipse.ant.internal.ui.preferences.AbstractAntEditorPreferencePage#getHelpContextId() */ @Override protected String getHelpContextId() { return IAntUIHelpContextIds.ANT_EDITOR_FORMATTER_PREFERENCE_PAGE; } }