/*******************************************************************************
 * Copyright (c) 2001, 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
 *     Jens Lukowski/Innoopract - initial renaming/restructuring
 *     
 *******************************************************************************/
package org.eclipse.wst.sse.ui.internal.search;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IResource;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.search.ui.ISearchQuery;
import org.eclipse.search.ui.text.AbstractTextSearchResult;
import org.eclipse.search.ui.text.IEditorMatchAdapter;
import org.eclipse.search.ui.text.IFileMatchAdapter;
import org.eclipse.search.ui.text.Match;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.wst.sse.ui.internal.editor.EditorPluginImageHelper;
import org.eclipse.wst.sse.ui.internal.editor.EditorPluginImages;


/**
 * @author pavery
 */
public class OccurrencesSearchResult extends AbstractTextSearchResult implements IEditorMatchAdapter, IFileMatchAdapter {

	private ISearchQuery fQuery = null;
	private final Match[] NO_MATCHES = new Match[0];

	public OccurrencesSearchResult(ISearchQuery query) {
		this.fQuery = query;
	}

	/**
	 * @see org.eclipse.search.ui.text.IEditorMatchAdapter#computeContainedMatches(org.eclipse.search.ui.text.AbstractTextSearchResult,
	 *      org.eclipse.ui.IEditorPart)
	 */
	public Match[] computeContainedMatches(AbstractTextSearchResult result, IEditorPart editor) {

		IEditorInput editorInput = editor.getEditorInput();
		if (editorInput instanceof IFileEditorInput) {
			IFileEditorInput fileEditorInput = (IFileEditorInput) editorInput;
			return computeContainedMatches(result, fileEditorInput.getFile());
		}
		return this.NO_MATCHES;
	}

	/**
	 * @see org.eclipse.search.ui.text.IFileMatchAdapter#computeContainedMatches(org.eclipse.search.ui.text.AbstractTextSearchResult,
	 *      org.eclipse.core.resources.IFile)
	 */
	public Match[] computeContainedMatches(AbstractTextSearchResult result, IFile file) {
		Match[] matches = this.getMatches();
		Match[] containedMatches = new Match[0];
		
		/* only contains matches if the file for one of the matches is the
		 * same as the given file.
		 * Note: all matches in a result are related to the same file
		 */
		if(matches.length > 0 &&
			matches[0].getElement() instanceof BasicSearchMatchElement &&
			((BasicSearchMatchElement)matches[0].getElement()).getFile().equals(file)) {
			
			containedMatches = matches;
		}
		return containedMatches;
	}

	/**
	 * @see org.eclipse.search.ui.text.AbstractTextSearchResult#getEditorMatchAdapter()
	 */
	public IEditorMatchAdapter getEditorMatchAdapter() {
		return this;
	}

	/**
	 * @see org.eclipse.search.ui.text.IFileMatchAdapter#getFile(java.lang.Object)
	 */
	public IFile getFile(Object element) {
		// return the file for the match
		IFile file = null;
		//System.out.println("get file for:"+element);
		if (element instanceof IMarker) {
			IResource r = ((IMarker) element).getResource();
			if (r instanceof IFile) {
				file = (IFile) r;
			}
		}
		return file;
	}

	public IFileMatchAdapter getFileMatchAdapter() {
		return this;
	}

	public ImageDescriptor getImageDescriptor() {
		return EditorPluginImageHelper.getInstance().getImageDescriptor(EditorPluginImages.IMG_OBJ_OCC_MATCH);
	}

	/**
	 * This label shows up in the search history
	 */
	public String getLabel() {
		return getQuery().getLabel();
	}

	/**
	 * @return the matches associated with this result
	 */
	public Match[] getMatches() {
		return collectMatches(getElements());
	}

	public ISearchQuery getQuery() {
		return this.fQuery;
	}

	public String getTooltip() {
		return getLabel();
	}

	/**
	 * @see org.eclipse.search.ui.text.IEditorMatchAdapter#isShownInEditor(org.eclipse.search.ui.text.Match,
	 *      org.eclipse.ui.IEditorPart)
	 */
	public boolean isShownInEditor(Match match, IEditorPart editor) {
		return true;
	}
	
	/**
	 * <p>Taken from {@link org.eclipse.jdt.internal.ui.search.OccurrencesSearchResult#collectMatches}</p>
	 * 
	 * @param elements get the matches for these elements
	 * @return the matches associated with this result
	 */
	private Match[] collectMatches(Object[] elements) {
		Match[] matches= new Match[getMatchCount()];
		int writeIndex= 0;
		for (int i= 0; i < elements.length; i++) {
			Match[] perElement= getMatches(elements[i]);
			for (int j= 0; j < perElement.length; j++) {
				matches[writeIndex++]= perElement[j];
			}
		}
		return matches;
	}
}