/*******************************************************************************
 * Copyright (c) 2004, 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 Corp. - Rational Software - initial implementation
 *     Markus Schorn (Wind River Systems)
 *     Ed Swartz (Nokia)
 *     Anton Leherbauer (Wind River Systems)
 *******************************************************************************/

package org.eclipse.cdt.internal.ui.search.actions;

import com.ibm.icu.text.MessageFormat;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.ui.texteditor.ITextEditor;

import org.eclipse.cdt.core.dom.IName;
import org.eclipse.cdt.core.dom.ast.IASTFileLocation;

import org.eclipse.cdt.internal.ui.editor.CEditor;
import org.eclipse.cdt.internal.ui.search.CSearchMessages;
import org.eclipse.cdt.internal.ui.util.EditorUtility;
import org.eclipse.cdt.internal.ui.util.StatusLineHandler;

/**
 * @author aniefer
 * Created on Jun 2, 2004
 */
public class SelectionParseAction extends Action {
        
	protected IWorkbenchSite fSite;
	protected CEditor fEditor;

	public SelectionParseAction() {
		super();
	}
	
	public SelectionParseAction(CEditor editor) {
		super();
		fEditor= editor;
		fSite= editor.getSite();
	}
	
	public SelectionParseAction(IWorkbenchSite site) {
		super();
		fSite= site;
	}

	public IWorkbenchSite getSite() {
		return fSite;
	}
	
	protected void showStatusLineMessage(final String message) {
		StatusLineHandler.showStatusLineMessage(fSite, message);
	}

	protected void clearStatusLine() {
		StatusLineHandler.clearStatusLine(fSite);
	}
    	
	protected ISelection getSelection() {
		ISelection sel = null;
		if (fSite != null && fSite.getSelectionProvider() != null) {
			sel = fSite.getSelectionProvider().getSelection();
		}
		
		return sel;
	}
	
    protected ITextSelection getSelectedStringFromEditor() {
        ISelection selection = getSelection();
        if (!(selection instanceof ITextSelection)) 
        	return null;

        return (ITextSelection) selection;
    }
    
    /**
     * Open the editor on the given name.
     * 
     * @param name
     */
    protected void open(IName name) throws CoreException {
		clearStatusLine();

    	IASTFileLocation fileloc = name.getFileLocation();
    	if (fileloc == null) {
    		reportSymbolLookupFailure(name.toString());
    		return;
    	}
    	
		IPath path = new Path(fileloc.getFileName());
    	int currentOffset = fileloc.getNodeOffset();
    	int currentLength = fileloc.getNodeLength();
    	
		open(path, currentOffset, currentLength);
    }

	protected void open(IPath path, int currentOffset, int currentLength) throws CoreException {
		clearStatusLine();

		IEditorPart editor = EditorUtility.openInEditor(path, fEditor.getInputCElement());
		if (editor instanceof ITextEditor) {
			ITextEditor textEditor = (ITextEditor) editor;
			textEditor.selectAndReveal(currentOffset, currentLength);
		} else {
			reportSourceFileOpenFailure(path);
		}
	}
    
    protected void reportSourceFileOpenFailure(IPath path) {
    	showStatusLineMessage(MessageFormat.format(
    			CSearchMessages.SelectionParseAction_FileOpenFailure_format, 
    			new Object[] { path.toOSString() }));
    }
    
    protected void reportSelectionMatchFailure() {
    	showStatusLineMessage(CSearchMessages.SelectionParseAction_SelectedTextNotSymbol_message); 
    }
    
    protected void reportSymbolLookupFailure(String symbol) {
    	showStatusLineMessage(MessageFormat.format(
    			CSearchMessages.SelectionParseAction_SymbolNotFoundInIndex_format, 
    			new Object[] { symbol }));
    }
    
    protected void reportIncludeLookupFailure(String filename) {
    	showStatusLineMessage(MessageFormat.format(
    			CSearchMessages.SelectionParseAction_IncludeNotFound_format, 
    			new Object[] { filename }));
    }
}
