Java tutorial
/******************************************************************************* * Copyright (c) 2009 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 * Zend Technologies *******************************************************************************/ package org.eclipse.php.internal.ui.editor; import java.util.ArrayList; import java.util.Collection; import java.util.Iterator; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.preference.PreferenceConverter; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.text.Document; import org.eclipse.jface.text.TextAttribute; import org.eclipse.jface.util.IPropertyChangeListener; import org.eclipse.jface.util.PropertyChangeEvent; import org.eclipse.php.internal.core.documentModel.provisional.contenttype.ContentTypeIdForPHP; import org.eclipse.php.internal.ui.editor.highlighter.LineStyleProviderForPhp; import org.eclipse.swt.SWT; import org.eclipse.swt.accessibility.ACC; import org.eclipse.swt.accessibility.AccessibleAdapter; import org.eclipse.swt.accessibility.AccessibleEvent; import org.eclipse.swt.custom.*; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.ui.internal.editors.text.EditorsPlugin; import org.eclipse.ui.texteditor.AbstractTextEditor; import org.eclipse.wst.sse.core.StructuredModelManager; import org.eclipse.wst.sse.core.internal.document.DocumentReader; import org.eclipse.wst.sse.core.internal.ltk.parser.RegionParser; import org.eclipse.wst.sse.core.internal.provisional.IModelManager; import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion; import org.eclipse.wst.sse.ui.internal.SSEUIMessages; public class PHPSourceViewer extends Composite implements IPropertyChangeListener { private Color fDefaultBackground; private Color fDefaultForeground; private String fInput = ""; //$NON-NLS-1$ private IStructuredDocumentRegion fNodes = null; private RegionParser fParser = null; private StyledText fText = null; private LineStyleProviderForPhp styleProvider; private IPreferenceStore editorStore; public PHPSourceViewer(Composite parent, int style) { super(parent, style); editorStore = EditorsPlugin.getDefault().getPreferenceStore(); fDefaultBackground = editorStore.getBoolean(AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT) ? null : new Color(getDisplay(), PreferenceConverter.getColor(editorStore, AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND)); fDefaultForeground = editorStore.getBoolean(AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND_SYSTEM_DEFAULT) ? null : new Color(getDisplay(), PreferenceConverter.getColor(editorStore, AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND)); editorStore.addPropertyChangeListener(this); FillLayout layout = new FillLayout(); setLayout(layout); // GridData data = new GridData(GridData.FILL_BOTH | // GridData.VERTICAL_ALIGN_FILL | GridData.HORIZONTAL_ALIGN_FILL); // setLayoutData(data); createControls(this); setupViewer(); } /* * (non-Javadoc) * * @see * org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse * .jface.util.PropertyChangeEvent) */ public void propertyChange(final PropertyChangeEvent event) { if (AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT.equals(event.getProperty())) { if (editorStore.getBoolean(AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT)) fDefaultBackground = null; else fDefaultBackground = new Color(Display.getCurrent(), PreferenceConverter.getColor(editorStore, AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND)); refresh(); } else if (AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND_SYSTEM_DEFAULT.equals(event.getProperty())) { if (editorStore.getBoolean(AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND_SYSTEM_DEFAULT)) fDefaultForeground = null; else fDefaultForeground = new Color(Display.getCurrent(), PreferenceConverter.getColor(editorStore, AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND)); refresh(); } else if (AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND.equals(event.getProperty())) { fDefaultBackground = new Color(Display.getCurrent(), PreferenceConverter.getColor(editorStore, AbstractTextEditor.PREFERENCE_COLOR_BACKGROUND)); refresh(); } else if (AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND.equals(event.getProperty())) { fDefaultForeground = new Color(Display.getCurrent(), PreferenceConverter.getColor(editorStore, AbstractTextEditor.PREFERENCE_COLOR_FOREGROUND)); refresh(); } } public void createControls(Composite parent) { fText = new StyledText(parent, SWT.MULTI | SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER); fText.getContent().addTextChangeListener(new TextChangeListener() { DocumentReader docReader; Document document; public void textChanging(TextChangingEvent event) { } public void textChanged(TextChangedEvent event) { if (docReader == null) { document = new Document(); docReader = new DocumentReader(); } fInput = getText(); document.set(fInput); docReader.reset(document, 0); getParser().reset(docReader); fNodes = getParser().getDocumentRegions(); applyStyles(); } public void textSet(TextChangedEvent event) { } }); fText.setBackground(fDefaultBackground); fText.setForeground(fDefaultForeground); fText.setFont(JFaceResources.getTextFont()); setAccessible(fText, SSEUIMessages.Sample_text__UI_); //$NON-NLS-1$ = "&Sample text:" } public void setEditable(boolean editable) { fText.setEditable(editable); } /** * @return org.eclipse.swt.graphics.Color */ public Color getDefaultBackground() { return fDefaultBackground; } /** * @return org.eclipse.swt.graphics.Color */ public Color getDefaultForeground() { return fDefaultForeground; } public Font getFont() { return fText.getFont(); } public RegionParser getParser() { return fParser; } public String getText() { return fText.getText(); } // refresh the GUI after a color change public void refresh() { if (!fText.isDisposed()) { fText.setRedraw(false); fText.setBackground(fDefaultBackground); fText.setForeground(fDefaultForeground); // update Font fText.setFont(JFaceResources.getTextFont()); // reapplyStyles applyStyles(); fText.setRedraw(true); } } public void releasePickerResources() { } /** * Specifically set the reporting name of a control for accessibility */ private void setAccessible(Control control, String name) { if (control == null) return; final String n = name; control.getAccessible().addAccessibleListener(new AccessibleAdapter() { public void getName(AccessibleEvent e) { if (e.childID == ACC.CHILDID_SELF) e.result = n; } }); } /** * @param newDefaultBackground * org.eclipse.swt.graphics.Color */ public void setDefaultBackground(Color newDefaultBackground) { fDefaultBackground = newDefaultBackground; } /** * @param newDefaultForeground * org.eclipse.swt.graphics.Color */ public void setDefaultForeground(Color newDefaultForeground) { fDefaultForeground = newDefaultForeground; } public void setFont(Font font) { fText.setFont(font); fText.redraw(); } /** * @param newParser */ public void setParser(RegionParser newParser) { fParser = newParser; } public TextAttribute getAttribute(String namedStyle) { TextAttribute ta = new TextAttribute(getDefaultForeground(), getDefaultBackground(), SWT.NORMAL); if (namedStyle != null && styleProvider != null) { ta = styleProvider.getTextAttributeForColor(namedStyle); } return ta; } public void applyStyles() { if (fText == null || fText.isDisposed() || fInput == null || fInput.length() == 0) { return; } styleProvider.loadColors(); IStructuredDocumentRegion documentRegion = fNodes; while (documentRegion != null) { final Collection holdResults = new ArrayList(); styleProvider.prepareTextRegions(documentRegion, 0, documentRegion.getEnd(), holdResults); for (Iterator iter = holdResults.iterator(); iter.hasNext();) { StyleRange element = (StyleRange) iter.next(); fText.setStyleRange(element); } documentRegion = documentRegion.getNext(); } } public void setText(String s) { fInput = s; DocumentReader docReader = new DocumentReader(new Document(fInput)); getParser().reset(docReader); fNodes = getParser().getDocumentRegions(); if (fText != null) { fText.setText(s); } applyStyles(); } public void setupViewer() { IModelManager mmanager = StructuredModelManager.getModelManager(); setParser(mmanager.createStructuredDocumentFor(ContentTypeIdForPHP.ContentTypeID_PHP).getParser()); styleProvider = new LineStyleProviderForPhp(); } public StyledText getTextWidget() { return fText; } /* * (non-Javadoc) * * @see org.eclipse.swt.widgets.Widget#dispose() */ public void dispose() { editorStore.removePropertyChangeListener(this); fDefaultBackground.dispose(); fDefaultForeground.dispose(); super.dispose(); } }