/*******************************************************************************
 * Copyright (c) 2004 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.css.ui.views.properties;


import org.eclipse.core.resources.IFile;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorReference;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.views.properties.TextPropertyDescriptor;
import org.eclipse.wst.css.core.document.ICSSModel;
import org.eclipse.wst.css.core.document.ICSSNode;
import org.eclipse.wst.css.core.util.CSSPathService;
import org.eclipse.wst.sse.core.IStructuredModel;
import org.eclipse.wst.sse.core.StructuredModelManager;
import org.eclipse.wst.xml.core.document.XMLNode;

/**
 */
public class CSSTextPropertyDescriptor extends TextPropertyDescriptor {
	private final ICSSNode fNode;

	/**
	 * CSSTextPropertyDescriptor constructor comment.
	 * 
	 * @param id
	 *            java.lang.String
	 * @param displayName
	 *            java.lang.String
	 */
	public CSSTextPropertyDescriptor(String id, String displayName, ICSSNode node) {
		super(id, displayName);
		this.fNode = node;
	}

	public CSSTextPropertyDescriptor(String id, String displayName, ICSSNode node, String category) {
		super(id, displayName);
		this.fNode = node;
		setCategory(category);
	}

	/**
	 * @return org.eclipse.jface.viewers.CellEditor
	 * @param parent
	 *            org.eclipse.swt.widgets.Composite
	 */
	public CellEditor createPropertyEditor(Composite parent) {
		ICSSModel model = fNode.getOwnerDocument().getModel();
		if (model == null)
			return null;
		if (model.getStyleSheetType() == ICSSModel.EXTERNAL && findEditor(model) == null)
			return null;
		// check whether IFile is readonly to prohibit editing before
		// validateEdit()
		IStructuredModel structuredModel = model;
		if (model.getStyleSheetType() != ICSSModel.EXTERNAL) {
			structuredModel = ((XMLNode) model.getOwnerDOMNode()).getModel();
			if (structuredModel == null)
				return null;
		}
		IFile file = CSSPathService.location2File(structuredModel.getBaseLocation());
		if (file == null || file.isReadOnly())
			return null;

		return super.createPropertyEditor(parent);
	}

	private static IEditorPart findEditor(ICSSModel model) {
		IWorkbench workbench = PlatformUI.getWorkbench();
		IWorkbenchWindow[] windows = workbench.getWorkbenchWindows();
		for (int i = 0; i < windows.length; i++) {
			IWorkbenchPage[] pages = windows[i].getPages();
			for (int j = 0; j < pages.length; j++) {
				IEditorReference[] editors = pages[j].getEditorReferences();
				for (int k = 0; k < editors.length; k++) {
					IEditorPart editPart = editors[k].getEditor(false);
					if (editPart != null) {
						IEditorInput editorInput = editPart.getEditorInput();
						if (editorInput instanceof IFileEditorInput) {
							IFile file = ((IFileEditorInput) editorInput).getFile();
							if (file != null) {
								//TODO Urgent needs to be fixed
								// I think we need 'equals' (or 'equivalent'
								// on model) for cases like this
								if (StructuredModelManager.getModelManager().calculateId(file).equals(model.getId())) {
									return editPart;
								}
							}
						}
					}
				}
			}
		}
		return null;
	}
}