Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2005 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; import org.eclipse.ant.internal.ui.editor.text.AntDocumentSetupParticipant; import org.eclipse.ant.internal.ui.editor.text.AntEditorPartitionScanner; import org.eclipse.ant.internal.ui.editor.text.AntEditorProcInstrScanner; import org.eclipse.ant.internal.ui.editor.text.AntEditorTagScanner; import org.eclipse.ant.internal.ui.editor.text.IAntEditorColorConstants; import org.eclipse.ant.internal.ui.editor.text.MultilineDamagerRepairer; import org.eclipse.ant.internal.ui.preferences.AntEditorPreferenceConstants; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.resource.StringConverter; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.ITextDoubleClickStrategy; import org.eclipse.jface.text.TextAttribute; import org.eclipse.jface.text.presentation.IPresentationReconciler; import org.eclipse.jface.text.presentation.PresentationReconciler; import org.eclipse.jface.text.source.ISourceViewer; import org.eclipse.jface.util.PropertyChangeEvent; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.RGB; import org.eclipse.ui.editors.text.TextSourceViewerConfiguration; import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants; public class AntSourceViewerConfiguration extends TextSourceViewerConfiguration { private AntEditorTagScanner tagScanner; private AntEditorProcInstrScanner instructionScanner; private MultilineDamagerRepairer damageRepairer; private MultilineDamagerRepairer dtdDamageRepairer; private TextAttribute xmlCommentAttribute; private TextAttribute xmlDtdAttribute; public AntSourceViewerConfiguration() { super(AntUIPlugin.getDefault().getCombinedPreferenceStore()); } private AntEditorProcInstrScanner getDefaultScanner() { if (instructionScanner == null) { instructionScanner = new AntEditorProcInstrScanner(); } return instructionScanner; } private AntEditorTagScanner getTagScanner() { if (tagScanner == null) { tagScanner = new AntEditorTagScanner(); } return tagScanner; } /* * (non-Javadoc) * * @see org.eclipse.jface.text.source.SourceViewerConfiguration#getPresentationReconciler(org.eclipse.jface.text.source.ISourceViewer) */ @Override public IPresentationReconciler getPresentationReconciler(ISourceViewer sourceViewer) { PresentationReconciler reconciler = new PresentationReconciler(); reconciler.setDocumentPartitioning(getConfiguredDocumentPartitioning(sourceViewer)); MultilineDamagerRepairer dr = new MultilineDamagerRepairer(getDefaultScanner()); reconciler.setDamager(dr, IDocument.DEFAULT_CONTENT_TYPE); reconciler.setRepairer(dr, IDocument.DEFAULT_CONTENT_TYPE); dr = new MultilineDamagerRepairer(getTagScanner()); reconciler.setDamager(dr, AntEditorPartitionScanner.XML_TAG); reconciler.setRepairer(dr, AntEditorPartitionScanner.XML_TAG); int style = getStyle(IAntEditorColorConstants.XML_COMMENT_COLOR); xmlCommentAttribute = new TextAttribute( AntUIPlugin.getPreferenceColor(IAntEditorColorConstants.XML_COMMENT_COLOR), null, style); damageRepairer = new MultilineDamagerRepairer(null, xmlCommentAttribute); reconciler.setDamager(damageRepairer, AntEditorPartitionScanner.XML_COMMENT); reconciler.setRepairer(damageRepairer, AntEditorPartitionScanner.XML_COMMENT); style = getStyle(IAntEditorColorConstants.XML_DTD_COLOR); xmlDtdAttribute = new TextAttribute(AntUIPlugin.getPreferenceColor(IAntEditorColorConstants.XML_DTD_COLOR), null, style); dtdDamageRepairer = new MultilineDamagerRepairer(null, xmlDtdAttribute); reconciler.setDamager(dtdDamageRepairer, AntEditorPartitionScanner.XML_DTD); reconciler.setRepairer(dtdDamageRepairer, AntEditorPartitionScanner.XML_DTD); return reconciler; } private int getStyle(String pref) { int style = SWT.NORMAL; if (fPreferenceStore.getBoolean(pref + AntEditorPreferenceConstants.EDITOR_BOLD_SUFFIX)) { style |= SWT.BOLD; } if (fPreferenceStore.getBoolean(pref + AntEditorPreferenceConstants.EDITOR_ITALIC_SUFFIX)) { style |= SWT.ITALIC; } return style; } /** * Preference colors have changed. Update the default tokens of the scanners. */ public void adaptToPreferenceChange(PropertyChangeEvent event) { if (tagScanner == null) { return; // property change before the editor is fully created } tagScanner.adaptToPreferenceChange(event); instructionScanner.adaptToPreferenceChange(event); String property = event.getProperty(); if (property.startsWith(IAntEditorColorConstants.XML_COMMENT_COLOR)) { xmlCommentAttribute = adaptTextAttribute(event, property, xmlCommentAttribute, damageRepairer); } else if (property.startsWith(IAntEditorColorConstants.XML_DTD_COLOR)) { xmlDtdAttribute = adaptTextAttribute(event, property, xmlDtdAttribute, dtdDamageRepairer); } } private TextAttribute adaptTextAttribute(PropertyChangeEvent event, String property, TextAttribute textAttribute, MultilineDamagerRepairer repairer) { if (property.endsWith(AntEditorPreferenceConstants.EDITOR_BOLD_SUFFIX)) { textAttribute = adaptToStyleChange(event, SWT.BOLD, textAttribute); } else if (property.endsWith(AntEditorPreferenceConstants.EDITOR_ITALIC_SUFFIX)) { textAttribute = adaptToStyleChange(event, SWT.ITALIC, textAttribute); } else { textAttribute = adaptToColorChange(event, textAttribute); } repairer.setDefaultTextAttribute(textAttribute); return textAttribute; } private TextAttribute adaptToStyleChange(PropertyChangeEvent event, int styleAttribute, TextAttribute textAttribute) { boolean eventValue = false; Object value = event.getNewValue(); if (value instanceof Boolean) { eventValue = ((Boolean) value).booleanValue(); } else if (IPreferenceStore.TRUE.equals(value)) { eventValue = true; } boolean activeValue = (textAttribute.getStyle() & styleAttribute) == styleAttribute; if (activeValue != eventValue) { textAttribute = new TextAttribute(textAttribute.getForeground(), textAttribute.getBackground(), eventValue ? textAttribute.getStyle() | styleAttribute : textAttribute.getStyle() & ~styleAttribute); } return textAttribute; } /** * Update the text attributes associated with the tokens of this scanner as a color preference has been changed. */ private TextAttribute adaptToColorChange(PropertyChangeEvent event, TextAttribute textAttribute) { RGB rgb = null; Object value = event.getNewValue(); if (value instanceof RGB) { rgb = (RGB) value; } else if (value instanceof String) { rgb = StringConverter.asRGB((String) value); } if (rgb != null) { textAttribute = new TextAttribute(ColorManager.getDefault().getColor(rgb), textAttribute.getBackground(), textAttribute.getStyle()); } return textAttribute; } /* * (non-Javadoc) * * @see org.eclipse.jface.text.source.SourceViewerConfiguration#getConfiguredContentTypes(org.eclipse.jface.text.source.ISourceViewer) */ @Override public String[] getConfiguredContentTypes(ISourceViewer sourceViewer) { return new String[] { IDocument.DEFAULT_CONTENT_TYPE, AntEditorPartitionScanner.XML_COMMENT, AntEditorPartitionScanner.XML_TAG, AntEditorPartitionScanner.XML_CDATA, AntEditorPartitionScanner.XML_DTD }; } /* * (non-Javadoc) * * @see org.eclipse.jface.text.source.SourceViewerConfiguration#getTabWidth(org.eclipse.jface.text.source.ISourceViewer) */ @Override public int getTabWidth(ISourceViewer sourceViewer) { return fPreferenceStore.getInt(AbstractDecoratedTextEditorPreferenceConstants.EDITOR_TAB_WIDTH); } public boolean affectsTextPresentation(PropertyChangeEvent event) { String property = event.getProperty(); return property.startsWith(IAntEditorColorConstants.TEXT_COLOR) || property.startsWith(IAntEditorColorConstants.PROCESSING_INSTRUCTIONS_COLOR) || property.startsWith(IAntEditorColorConstants.STRING_COLOR) || property.startsWith(IAntEditorColorConstants.TAG_COLOR) || property.startsWith(IAntEditorColorConstants.XML_COMMENT_COLOR) || property.startsWith(IAntEditorColorConstants.XML_DTD_COLOR); } /* * (non-Javadoc) * * @see org.eclipse.jface.text.source.SourceViewerConfiguration#getConfiguredDocumentPartitioning(org.eclipse.jface.text.source.ISourceViewer) */ @Override public String getConfiguredDocumentPartitioning(ISourceViewer sourceViewer) { return AntDocumentSetupParticipant.ANT_PARTITIONING; } /* * (non-Javadoc) * * @see org.eclipse.jface.text.source.SourceViewerConfiguration#getDoubleClickStrategy(org.eclipse.jface.text.source.ISourceViewer, * java.lang.String) */ @Override public ITextDoubleClickStrategy getDoubleClickStrategy(ISourceViewer sourceViewer, String contentType) { if (AntEditorPartitionScanner.XML_TAG.equals(contentType)) { return new AntDoubleClickStrategy(); } return super.getDoubleClickStrategy(sourceViewer, contentType); } }