/*******************************************************************************
 * Copyright (c) 2007 Chase Technology Ltd - http://www.chasetechnology.co.uk
 * 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:
 *     Doug Satchwell (Chase Technology Ltd) - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.xsl.internal.debug.ui.model;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.model.IBreakpoint;
import org.eclipse.debug.core.model.ILineBreakpoint;
import org.eclipse.debug.ui.actions.IToggleBreakpointsTarget;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.wst.xsl.core.XSLCore;
import org.eclipse.wst.xsl.launching.model.IXSLConstants;
import org.eclipse.wst.xsl.launching.model.XSLLineBreakpoint;

/**
 * An <code>IToggleBreakpointsTarget</code> for XSL breakpoints.
 * 
 * @author Doug Satchwell
 */
public class XSLLineBreakpointAdapter implements IToggleBreakpointsTarget {
	public void toggleLineBreakpoints(IWorkbenchPart part, ISelection selection)
			throws CoreException {
		ITextEditor textEditor = getEditor(part);
		if (textEditor != null) {
			IResource resource = (IResource) textEditor.getEditorInput()
					.getAdapter(IResource.class);
			ITextSelection textSelection = (ITextSelection) selection;
			int lineNumber = textSelection.getStartLine();
			IBreakpoint[] breakpoints = DebugPlugin.getDefault()
					.getBreakpointManager().getBreakpoints(
							IXSLConstants.ID_XSL_DEBUG_MODEL);
			for (IBreakpoint breakpoint : breakpoints) {
				if (resource.equals(breakpoint.getMarker().getResource())) {
					if (((ILineBreakpoint) breakpoint).getLineNumber() == (lineNumber + 1)) {
						// remove
						breakpoint.delete();
						return;
					}
				}
			}
			// create line breakpoint (doc line numbers start at 0)
			XSLLineBreakpoint lineBreakpoint = new XSLLineBreakpoint(resource,
					lineNumber + 1, 1, 1);
			DebugPlugin.getDefault().getBreakpointManager().addBreakpoint(
					lineBreakpoint);
		}
	}

	public boolean canToggleLineBreakpoints(IWorkbenchPart part,
			ISelection selection) {
		return getEditor(part) != null;
	}

	/**
	 * Returns the editor being used to edit a XSL file, associated with the
	 * given part, or <code>null</code> if none.
	 */
	private ITextEditor getEditor(IWorkbenchPart part) {
		if (part instanceof ITextEditor) {
			ITextEditor editorPart = (ITextEditor) part;
			IResource resource = (IResource) editorPart.getEditorInput()
					.getAdapter(IResource.class);
			if (resource != null && resource.getType() == IResource.FILE) {
				if (XSLCore.isXSLFile((IFile) resource)) {
					return editorPart;
				}
			}
		}
		return null;
	}

	public void toggleMethodBreakpoints(IWorkbenchPart part,
			ISelection selection) throws CoreException {
	}

	public boolean canToggleMethodBreakpoints(IWorkbenchPart part,
			ISelection selection) {
		return false;
	}

	public void toggleWatchpoints(IWorkbenchPart part, ISelection selection)
			throws CoreException {
	}

	public boolean canToggleWatchpoints(IWorkbenchPart part,
			ISelection selection) {
		return false;
	}
}