/*******************************************************************************
 * Copyright (c) 2001, 2008 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.xsd.ui.internal.adt.design.directedit;

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.PlatformUI;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.part.CellEditorActionHandler;
import org.eclipse.wst.xsd.ui.internal.adt.actions.BaseSelectionAction;
import org.eclipse.wst.xsd.ui.internal.adt.design.editparts.INamedEditPart;

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() {
//    super.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()).getNameLabelFigure();
    
		if (label != null) {
			scaledFont = label.getFont();
			
			Color color = label.getBackgroundColor();
			text.setBackground(color);
			
			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 = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage()
				.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);
		// https://bugs.eclipse.org/bugs/show_bug.cgi?id=252509
		// Delete action (key) doesn't always work.  The saved action could be the 
		// CellEditorActionHandler's DeleteActionHandler...due to timing issues.
		// We'll only restore the delete action if it is indeed the one for the Design view.
		// We should update the other actions too, but currently, none are applicable.
		if (delete instanceof BaseSelectionAction)
		{
      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());
    IAction currentDeleteAction = actionBars.getGlobalActionHandler(ActionFactory.DELETE.getId());
    // https://bugs.eclipse.org/bugs/show_bug.cgi?id=252509
    // Delete action (key) doesn't always work.  The saved action could be the 
    // CellEditorActionHandler's DeleteActionHandler...due to timing issues.
    // We'll only restore the delete action if it is indeed the one for the Design view.
    // We should update the other actions too, but currently, none are applicable.
    if (currentDeleteAction instanceof BaseSelectionAction)
    {
      delete = currentDeleteAction;
    }
		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());
	}
}