/*******************************************************************************
 * Copyright (c) 2001, 2006 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.wsdl.asd.design.directedit;

import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.Label;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.gef.tools.CellEditorLocator;
import org.eclipse.gef.tools.DirectEditManager;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.part.CellEditorActionHandler;
import org.eclipse.wst.wsdl.asd.design.DesignViewGraphicsConstants;
import org.eclipse.wst.wsdl.asd.design.editparts.INamedEditPart;
import org.eclipse.wst.wsdl.asd.editor.ASDEditorPlugin;

public class LabelEditManager extends DirectEditManager {

	private IActionBars actionBars;
	private CellEditorActionHandler actionHandler;
	private IAction copy, cut, paste, undo, redo, find, selectAll, delete;
	private Font scaledFont;

	public LabelEditManager(GraphicalEditPart source, CellEditorLocator locator) {
		super(source, null, locator);
	}

	/**
	 * @see org.eclipse.gef.tools.DirectEditManager#bringDown()
	 */
	protected void bringDown() {
		if (actionHandler != null) {
			actionHandler.dispose();
			actionHandler = null;
		}
		if (actionBars != null) {
			restoreSavedActions(actionBars);
			actionBars.updateActionBars();
			actionBars = null;
		}

		Font disposeFont = scaledFont;
		scaledFont = null;
		super.bringDown();
		if (disposeFont != null)
			disposeFont.dispose();
	}
	
	public void showFeedback() {
		getEditPart().showSourceFeedback(getDirectEditRequest());
	}

	protected CellEditor createCellEditorOn(Composite composite) {
		return new TextCellEditor(composite, SWT.SINGLE | SWT.WRAP);
	}

	protected void initCellEditor() {
		Text text = (Text)getCellEditor().getControl();
		Label label = ((INamedEditPart) getEditPart()).getLabelFigure();
		
		if (label != null) {
			scaledFont = label.getFont();
			
			// TODO: rmah:  hack here to set the background color of the
			// direct edit Text.  Solution is to make the Text transparent...
			Color color = label.getBackgroundColor();
			if (color.equals(DesignViewGraphicsConstants.tableCellSelectionColor)) {
				text.setBackground(color);
			}
			else {
				text.setBackground(ColorConstants.lightBlue);
			}
			
			String initialLabelText = label.getText();
			getCellEditor().setValue(initialLabelText);
		}
		else {
			scaledFont = label.getParent().getFont();
			text.setBackground(label.getParent().getBackgroundColor());
		}
		
		FontData data = scaledFont.getFontData()[0];
		Dimension fontSize = new Dimension(0, data.getHeight());
		label.getParent().translateToAbsolute(fontSize);
		data.setHeight(fontSize.height);
		scaledFont = new Font(null, data);
		
		text.setFont(scaledFont);
//		text.selectAll();

		// Hook the cell editor's copy/paste actions to the actionBars so that they can
		// be invoked via keyboard shortcuts.
		actionBars = ASDEditorPlugin.getActiveEditor().getEditorSite().getActionBars();
		saveCurrentActions(actionBars);
		actionHandler = new CellEditorActionHandler(actionBars);
		actionHandler.addCellEditor(getCellEditor());
		actionBars.updateActionBars();
	}

	private void restoreSavedActions(IActionBars actionBars){
		actionBars.setGlobalActionHandler(ActionFactory.COPY.getId(), copy);
		actionBars.setGlobalActionHandler(ActionFactory.PASTE.getId(), paste);
		actionBars.setGlobalActionHandler(ActionFactory.DELETE.getId(), delete);
		actionBars.setGlobalActionHandler(ActionFactory.SELECT_ALL.getId(), selectAll);
		actionBars.setGlobalActionHandler(ActionFactory.CUT.getId(), cut);
		actionBars.setGlobalActionHandler(ActionFactory.FIND.getId(), find);
		actionBars.setGlobalActionHandler(ActionFactory.UNDO.getId(), undo);
		actionBars.setGlobalActionHandler(ActionFactory.REDO.getId(), redo);
	}

	private void saveCurrentActions(IActionBars actionBars) {
		copy = actionBars.getGlobalActionHandler(ActionFactory.COPY.getId());
		paste = actionBars.getGlobalActionHandler(ActionFactory.PASTE.getId());
		delete = actionBars.getGlobalActionHandler(ActionFactory.DELETE.getId());
		selectAll = actionBars.getGlobalActionHandler(ActionFactory.SELECT_ALL.getId());
		cut = actionBars.getGlobalActionHandler(ActionFactory.CUT.getId());
		find = actionBars.getGlobalActionHandler(ActionFactory.FIND.getId());
		undo = actionBars.getGlobalActionHandler(ActionFactory.UNDO.getId());
		redo = actionBars.getGlobalActionHandler(ActionFactory.REDO.getId());
	}
}