content: /*******************************************************************************
   * Copyright (c) 2000, 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
   *******************************************************************************/
  package org.eclipse.wst.jsdt.internal.ui.text.java;
  
  import java.util.Collection;
  import java.util.Set;
  
  import org.eclipse.core.runtime.Assert;
  import org.eclipse.core.runtime.CoreException;
  import org.eclipse.jface.text.BadLocationException;
  import org.eclipse.jface.text.IDocument;
  import org.eclipse.jface.text.IRegion;
  import org.eclipse.jface.text.TextUtilities;
  import org.eclipse.jface.text.contentassist.ICompletionProposalExtension4;
  import org.eclipse.wst.jsdt.core.Flags;
  import org.eclipse.wst.jsdt.core.IField;
  import org.eclipse.wst.jsdt.core.IFunction;
  import org.eclipse.wst.jsdt.core.IType;
  import org.eclipse.wst.jsdt.core.JavaScriptModelException;
  import org.eclipse.wst.jsdt.core.Signature;
  import org.eclipse.wst.jsdt.core.dom.rewrite.ImportRewrite;
  import org.eclipse.wst.jsdt.core.formatter.CodeFormatter;
  import org.eclipse.wst.jsdt.internal.corext.codemanipulation.CodeGenerationSettings;
  import org.eclipse.wst.jsdt.internal.corext.codemanipulation.GetterSetterUtil;
  import org.eclipse.wst.jsdt.internal.corext.util.CodeFormatterUtil;
  import org.eclipse.wst.jsdt.internal.corext.util.Messages;
  import org.eclipse.wst.jsdt.internal.corext.util.Strings;
  import org.eclipse.wst.jsdt.internal.ui.JavaPluginImages;
  import org.eclipse.wst.jsdt.internal.ui.preferences.JavaPreferencesSettings;
  
  public class GetterSetterCompletionProposal extends JavaTypeCompletionProposal implements ICompletionProposalExtension4 {
  
  	public static void evaluateProposals(IType type, String prefix, int offset, int length, int relevance, Set suggestedMethods, Collection result) throws CoreException {
  		if (prefix.length() == 0) {
  			relevance--;
  		}
  
  		IField[] fields= type.getFields();
  		IFunction[] methods= type.getFunctions();
  		for (int i= 0; i < fields.length; i++) {
  			IField curr= fields[i];
  			String getterName= GetterSetterUtil.getGetterName(curr, null);
  			if (getterName.startsWith(prefix) && !hasMethod(methods, getterName) && suggestedMethods.add(getterName)) {
  				result.add(new GetterSetterCompletionProposal(curr, offset, length, true, relevance));
  			}
  
  			String setterName= GetterSetterUtil.getSetterName(curr, null);
  			if (setterName.startsWith(prefix) && !hasMethod(methods, setterName) && suggestedMethods.add(setterName)) {
  				result.add(new GetterSetterCompletionProposal(curr, offset, length, false, relevance));
  			}
  		}
  	}
  
  	private static boolean hasMethod(IFunction[] methods, String name) {
  		for (int i= 0; i < methods.length; i++) {
  			if (methods[i].getElementName().equals(name)) {
  				return true;
  			}
  		}
  		return false;
  	}
  
  	private final IField fField;
  	private final boolean fIsGetter;
  
  	public GetterSetterCompletionProposal(IField field, int start, int length, boolean isGetter, int relevance) throws JavaScriptModelException {
  		super("", field.getJavaScriptUnit(), start, length, JavaPluginImages.get(JavaPluginImages.IMG_MISC_PUBLIC), getDisplayName(field, isGetter), relevance); //$NON-NLS-1$
  		Assert.isNotNull(field);
  
  		fField= field;
  		fIsGetter= isGetter;
  		setProposalInfo(new ProposalInfo(field));
  	}
  
  	private static String getDisplayName(IField field, boolean isGetter) throws JavaScriptModelException {
  		StringBuffer buf= new StringBuffer();
  		if (isGetter) {
  			buf.append(GetterSetterUtil.getGetterName(field, null));
  			buf.append("()  "); //$NON-NLS-1$
  			buf.append(Signature.toString(field.getTypeSignature()));
  			buf.append(" - "); //$NON-NLS-1$
  			buf.append(Messages.format(JavaTextMessages.GetterSetterCompletionProposal_getter_label, field.getElementName()));
  		} else {
  			buf.append(GetterSetterUtil.getSetterName(field, null));
  			buf.append('(').append(Signature.toString(field.getTypeSignature())).append(')');
  			buf.append("  "); //$NON-NLS-1$
  			buf.append(Signature.toString(Signature.SIG_VOID));
  			buf.append(" - "); //$NON-NLS-1$
  			buf.append(Messages.format(JavaTextMessages.GetterSetterCompletionProposal_setter_label, field.getElementName()));
  		}
  		return buf.toString();
  	}
  
  	/* (non-Javadoc)
  	 * @see JavaTypeCompletionProposal#updateReplacementString(IDocument, char, int, ImportRewrite)
  	 */
  	protected boolean updateReplacementString(IDocument document, char trigger, int offset, ImportRewrite impRewrite) throws CoreException, BadLocationException {
  
  		CodeGenerationSettings settings= JavaPreferencesSettings.getCodeGenerationSettings(fField.getJavaScriptProject());
  		boolean addComments= settings.createComments;
  		int flags= Flags.AccPublic | (fField.getFlags() & Flags.AccStatic);
  
  		String stub;
  		if (fIsGetter) {
  			String getterName= GetterSetterUtil.getGetterName(fField, null);
  			stub= GetterSetterUtil.getGetterStub(fField, getterName, addComments, flags);
  		} else {
  			String setterName= GetterSetterUtil.getSetterName(fField, null);
  			stub= GetterSetterUtil.getSetterStub(fField, setterName, addComments, flags);
  		}
  
  		// use the code formatter
  		String lineDelim= TextUtilities.getDefaultLineDelimiter(document);
  
  		IRegion region= document.getLineInformationOfOffset(getReplacementOffset());
  		int lineStart= region.getOffset();
  		int indent= Strings.computeIndentUnits(document.get(lineStart, getReplacementOffset() - lineStart), settings.tabWidth, settings.indentWidth);
  
  		String replacement= CodeFormatterUtil.format(CodeFormatter.K_CLASS_BODY_DECLARATIONS, stub, indent, null, lineDelim, fField.getJavaScriptProject());
  
  		if (replacement.endsWith(lineDelim)) {
  			replacement= replacement.substring(0, replacement.length() - lineDelim.length());
  		}
  
  		setReplacementString(Strings.trimLeadingTabsAndSpaces(replacement));
  		return true;
  	}
  
  	/*
  	 * @see org.eclipse.jface.text.contentassist.ICompletionProposalExtension4#isAutoInsertable()
  	 */
  	public boolean isAutoInsertable() {
  		return false;
  	}
  }
  
  