Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2011 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 ext.org.eclipse.jdt.internal.ui.preferences; import java.util.Iterator; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.widgets.Shell; import org.eclipse.jdt.ui.PreferenceConstants; import org.eclipse.jdt.ui.text.IColorManager; import org.eclipse.jdt.ui.text.IJavaPartitions; import patch.org.eclipse.jdt.ui.text.JavaTextTools; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.preference.PreferenceConverter; import org.eclipse.jface.text.BadLocationException; import org.eclipse.jface.text.DefaultInformationControl; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.IInformationControl; import org.eclipse.jface.text.IInformationControlCreator; import org.eclipse.jface.text.IRegion; import org.eclipse.jface.text.ITextHover; import org.eclipse.jface.text.ITextViewer; import org.eclipse.jface.text.contentassist.ContentAssistant; import org.eclipse.jface.text.contentassist.IContentAssistant; import org.eclipse.jface.text.source.ISourceViewer; import org.eclipse.jface.text.templates.TemplateContextType; import org.eclipse.jface.text.templates.TemplateVariableResolver; import org.eclipse.ui.texteditor.ITextEditor; import patch.org.eclipse.jdt.internal.ui.JavaPlugin; import ext.org.eclipse.jdt.internal.ui.text.JavaWordFinder; import ext.org.eclipse.jdt.internal.ui.text.SimpleJavaSourceViewerConfiguration; import ext.org.eclipse.jdt.internal.ui.text.template.preferences.TemplateVariableProcessor; public class CodeTemplateSourceViewerConfiguration extends SimpleJavaSourceViewerConfiguration { private static class TemplateVariableTextHover implements ITextHover { private TemplateVariableProcessor fProcessor; /** * @param processor the template variable processor */ public TemplateVariableTextHover(TemplateVariableProcessor processor) { fProcessor = processor; } /* (non-Javadoc) * @see org.eclipse.jface.text.ITextHover#getHoverInfo(org.eclipse.jface.text.ITextViewer, org.eclipse.jface.text.IRegion) */ public String getHoverInfo(ITextViewer textViewer, IRegion subject) { try { IDocument doc = textViewer.getDocument(); int offset = subject.getOffset(); if (offset >= 2 && "${".equals(doc.get(offset - 2, 2))) { //$NON-NLS-1$ String varName = doc.get(offset, subject.getLength()); TemplateContextType contextType = fProcessor.getContextType(); if (contextType != null) { Iterator<TemplateVariableResolver> iter = contextType.resolvers(); while (iter.hasNext()) { TemplateVariableResolver var = iter.next(); if (varName.equals(var.getType())) { return var.getDescription(); } } } } } catch (BadLocationException e) { } return null; } /* (non-Javadoc) * @see org.eclipse.jface.text.ITextHover#getHoverRegion(org.eclipse.jface.text.ITextViewer, int) */ public IRegion getHoverRegion(ITextViewer textViewer, int offset) { if (textViewer != null) { return JavaWordFinder.findWord(textViewer.getDocument(), offset); } return null; } } private final TemplateVariableProcessor fProcessor; public CodeTemplateSourceViewerConfiguration(IColorManager colorManager, IPreferenceStore store, ITextEditor editor, TemplateVariableProcessor processor) { super(colorManager, store, editor, IJavaPartitions.JAVA_PARTITIONING, false); fProcessor = processor; } /* * @see SourceViewerConfiguration#getContentAssistant(ISourceViewer) */ @Override public IContentAssistant getContentAssistant(ISourceViewer sourceViewer) { IPreferenceStore store = JavaPlugin.getDefault().getPreferenceStore(); JavaTextTools textTools = JavaPlugin.getDefault().getJavaTextTools(); IColorManager manager = textTools.getColorManager(); ContentAssistant assistant = new ContentAssistant(); assistant.setContentAssistProcessor(fProcessor, IDocument.DEFAULT_CONTENT_TYPE); // Register the same processor for strings and single line comments to get code completion at the start of those partitions. assistant.setContentAssistProcessor(fProcessor, IJavaPartitions.JAVA_STRING); assistant.setContentAssistProcessor(fProcessor, IJavaPartitions.JAVA_CHARACTER); assistant.setContentAssistProcessor(fProcessor, IJavaPartitions.JAVA_SINGLE_LINE_COMMENT); assistant.setContentAssistProcessor(fProcessor, IJavaPartitions.JAVA_MULTI_LINE_COMMENT); assistant.setContentAssistProcessor(fProcessor, IJavaPartitions.JAVA_DOC); assistant.enableAutoInsert(store.getBoolean(PreferenceConstants.CODEASSIST_AUTOINSERT)); assistant.enableAutoActivation(store.getBoolean(PreferenceConstants.CODEASSIST_AUTOACTIVATION)); assistant.setAutoActivationDelay(store.getInt(PreferenceConstants.CODEASSIST_AUTOACTIVATION_DELAY)); assistant.setProposalPopupOrientation(IContentAssistant.PROPOSAL_OVERLAY); assistant.setContextInformationPopupOrientation(IContentAssistant.CONTEXT_INFO_ABOVE); assistant.setInformationControlCreator(new IInformationControlCreator() { public IInformationControl createInformationControl(Shell parent) { return new DefaultInformationControl(parent, JavaPlugin.getAdditionalInfoAffordanceString()); } }); Color background = getColor(store, PreferenceConstants.CODEASSIST_PARAMETERS_BACKGROUND, manager); assistant.setContextInformationPopupBackground(background); assistant.setContextSelectorBackground(background); Color foreground = getColor(store, PreferenceConstants.CODEASSIST_PARAMETERS_FOREGROUND, manager); assistant.setContextInformationPopupForeground(foreground); assistant.setContextSelectorForeground(foreground); return assistant; } private Color getColor(IPreferenceStore store, String key, IColorManager manager) { RGB rgb = PreferenceConverter.getColor(store, key); return manager.getColor(rgb); } /* * @see SourceViewerConfiguration#getTextHover(ISourceViewer, String, int) * @since 2.1 */ @Override public ITextHover getTextHover(ISourceViewer sourceViewer, String contentType, int stateMask) { return new TemplateVariableTextHover(fProcessor); } }