content: /*******************************************************************************
   * Copyright (c) 2000, 2008 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.wst.jsdt.internal.ui.text.java;
  
  
  import org.eclipse.core.runtime.Assert;
  import org.eclipse.jface.text.IDocument;
  import org.eclipse.swt.graphics.Image;
  import org.eclipse.wst.jsdt.ui.text.java.JavaContentAssistInvocationContext;
  
  
  public class JavaCompletionProposal extends AbstractJavaCompletionProposal {
  
  	/**
  	 * Creates a new completion proposal. All fields are initialized based on the provided
  	 * information.
  	 * 
  	 * @param replacementString the actual string to be inserted into the document
  	 * @param replacementOffset the offset of the text to be replaced
  	 * @param replacementLength the length of the text to be replaced
  	 * @param image the image to display for this proposal
  	 * @param displayString the string to be displayed for the proposal If set to <code>null</code>,
  	 *        the replacement string will be taken as display string.
  	 */
  	public JavaCompletionProposal(String replacementString, int replacementOffset, int replacementLength, Image image, String displayString, int relevance) {
  		this(replacementString, replacementOffset, replacementLength, image, displayString, relevance, false);
  	}
  	
  	/**
  	 * Creates a new completion proposal. All fields are initialized based on the provided
  	 * information.
  	 * 
  	 * @param replacementString the actual string to be inserted into the document
  	 * @param replacementOffset the offset of the text to be replaced
  	 * @param replacementLength the length of the text to be replaced
  	 * @param image the image to display for this proposal
  	 * @param displayString the string to be displayed for the proposal If set to <code>null</code>,
  	 *        the replacement string will be taken as display string.
  	 * @param relevance the relevance
  	 * @param inJavadoc <code>true</code> for a javadoc proposal
  	 * 
  	 */
  	public JavaCompletionProposal(String replacementString, int replacementOffset, int replacementLength, Image image, String displayString, int relevance, boolean inJavadoc) {
  		this(replacementString, replacementOffset, replacementLength, image, displayString, relevance, inJavadoc, null);
  	}
  	
  	/**
  	 * Creates a new completion proposal. All fields are initialized based on the provided
  	 * information.
  	 * 
  	 * @param replacementString the actual string to be inserted into the document
  	 * @param replacementOffset the offset of the text to be replaced
  	 * @param replacementLength the length of the text to be replaced
  	 * @param image the image to display for this proposal
  	 * @param displayString the string to be displayed for the proposal If set to <code>null</code>,
  	 *        the replacement string will be taken as display string.
  	 * @param relevance the relevance
  	 * @param inJavadoc <code>true</code> for a javadoc proposal
  	 * @param invocationContext the invocation context of this completion proposal or <code>null</code> not available
  	 * 
  	 */
  	public JavaCompletionProposal(String replacementString, int replacementOffset, int replacementLength, Image image, String displayString, int relevance, boolean inJavadoc, JavaContentAssistInvocationContext invocationContext) {
  		super(invocationContext);
  		Assert.isNotNull(replacementString);
  		Assert.isTrue(replacementOffset >= 0);
  		Assert.isTrue(replacementLength >= 0);
  
  		setReplacementString(replacementString);
  		setReplacementOffset(replacementOffset);
  		setReplacementLength(replacementLength);
  		setImage(image);
  		setDisplayString(displayString == null ? replacementString : displayString);
  		setRelevance(relevance);
  		setCursorPosition(replacementString.length());
  		setInJavadoc(inJavadoc);
  		setSortString(displayString == null ? replacementString : displayString);
  	}
  
  	/*
  	 * @see org.eclipse.wst.jsdt.internal.ui.text.java.AbstractJavaCompletionProposal#isValidPrefix(java.lang.String)
  	 */
  	public boolean isValidPrefix(String prefix) {
  		String word= getDisplayString();
  		if (isInJavadoc()) {
  			int idx = word.indexOf("{@link "); //$NON-NLS-1$
  			if (idx==0) {
  				word = word.substring(7);
  			} else {
  				idx = word.indexOf("{@value "); //$NON-NLS-1$
  				if (idx==0) {
  					word = word.substring(8);
  				}
  			}
  		} else if (word.indexOf("this.") != -1) { //$NON-NLS-1$
  			word= word.substring(word.indexOf("this.") + 5); //$NON-NLS-1$
  		}
  		return isPrefix(prefix, word);
  	}
  	
  	/*
  	 * @see org.eclipse.jface.text.contentassist.ICompletionProposalExtension3#getReplacementText()
  	 */
  	public CharSequence getPrefixCompletionText(IDocument document, int completionOffset) {
  		String string= getReplacementString();
  		int pos= string.indexOf('(');
  		if (pos > 0)
  			return string.subSequence(0, pos);
  		else if (string.startsWith("this.")) //$NON-NLS-1$
  			return string.substring(5);
  		else
  			return string;
  	}
  }
  