Java tutorial
/******************************************************************************* * Copyright (c) 2008-2010 Sonatype, Inc. * 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: * Sonatype, Inc. - initial API and implementation *******************************************************************************/ package org.eclipse.m2e.editor.xml; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.jface.text.BadLocationException; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.Region; import org.eclipse.jface.text.contentassist.ICompletionProposal; import org.eclipse.jface.text.contentassist.ICompletionProposalExtension5; import org.eclipse.jface.text.contentassist.IContextInformation; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Point; import org.apache.maven.model.InputLocation; import org.apache.maven.model.InputSource; import org.apache.maven.model.Model; import org.apache.maven.project.MavenProject; import org.eclipse.m2e.editor.xml.internal.Messages; /** * insertion proposal for ${ expressions * * @author mkleint */ public class InsertExpressionProposal implements ICompletionProposal, ICompletionProposalExtension5 { private static final Logger log = LoggerFactory.getLogger(InsertExpressionProposal.class); private MavenProject project; private String key; private Region region; private int len = 0; public InsertExpressionProposal(Region region, String key, MavenProject mvnproject) { assert project != null; this.region = region; this.key = key; this.project = mvnproject; } public Object getAdditionalProposalInfo(IProgressMonitor monitor) { if (project == null) { return null; } String value = PomTemplateContext.simpleInterpolate(project, "${" + key + "}"); //$NON-NLS-1$ //$NON-NLS-2$ MavenProject mavprj = project; String loc = null; if (mavprj != null) { Model mdl = mavprj.getModel(); if (mdl.getProperties() != null && mdl.getProperties().containsKey(key)) { if (mdl.getLocation("properties") != null) { InputLocation location = mdl.getLocation("properties").getLocation(key); //$NON-NLS-1$ if (location != null) { //MNGECLIPSE-2539 apparently you can have an InputLocation with null input source. // check! InputSource source = location.getSource(); if (source != null) { loc = source.getModelId(); } } } } } StringBuffer buff = new StringBuffer(); buff.append("<html>"); //$NON-NLS-1$ if (value != null) { buff.append(NLS.bind(Messages.InsertExpressionProposal_hint1, value)); } if (loc != null) { buff.append(NLS.bind(Messages.InsertExpressionProposal_hint2, loc)); } buff.append("</html>"); //$NON-NLS-1$ return buff.toString(); } public void apply(IDocument document) { int offset = region.getOffset(); String replace = "${" + key + "}"; //$NON-NLS-1$ //$NON-NLS-2$ try { document.replace(offset, region.getLength(), replace); len = replace.length(); } catch (BadLocationException e) { log.error("Cannot apply proposal", e); } } public Point getSelection(IDocument document) { return new Point(region.getOffset() + len, 0); } public String getAdditionalProposalInfo() { //not used anymore return null; } public String getDisplayString() { return "${" + key + "}"; //$NON-NLS-1$ //$NON-NLS-2$ } public Image getImage() { // TODO what kind of icon to use? return null; } public IContextInformation getContextInformation() { return null; } }