/*******************************************************************************
 * Copyright (c) 2006 Sybase, Inc. 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:
 *     Sybase, Inc. - initial API and implementation
 *******************************************************************************/
package org.eclipse.jst.pagedesigner.editors.actions;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.ActionContributionItem;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IContributionItem;
import org.eclipse.jface.action.IContributionManager;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.IToolBarManager;
import org.eclipse.jst.jsf.common.ui.internal.logging.Logger;
import org.eclipse.jst.pagedesigner.IHTMLConstants;
import org.eclipse.jst.pagedesigner.PDPlugin;
import org.eclipse.jst.pagedesigner.actions.range.DesignerToolBarAction;
import org.eclipse.jst.pagedesigner.editors.HTMLEditor;
import org.eclipse.jst.pagedesigner.editors.IDesignViewer;
import org.eclipse.jst.pagedesigner.editors.SimpleGraphicalEditor;
import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IEditorSite;
import org.eclipse.ui.IWorkbenchCommandConstants;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPartSite;
import org.eclipse.ui.part.EditorActionBarContributor;
import org.eclipse.ui.texteditor.ITextEditorActionConstants;

/**
 * sub action contributor for the designer page.
 * 
 * @author mengbo
 */
public class DesignPageActionContributor extends EditorActionBarContributor {
	private static final Logger _log = PDPlugin
			.getLogger(DesignPageActionContributor.class);

	/**
	 * paragraph
	 */
	public static final String PARAGRAPH_ACTION_ID = "paragraph"; //$NON-NLS-1$

	private IEditorPart _editorPart;

	/**
	 * @param manager
	 * @param id
	 */
	protected void doRemove(IContributionManager manager, String id) {
		try {
			if (manager.find(id) != null) {
				manager.remove(id);
			}
		} catch (Exception e) {
			_log.info("Error:", e); //$NON-NLS-1$
		}
	}

	public void init(IActionBars bars, IWorkbenchPage page) {
		super.init(bars);
		init(bars);
	}

	public void init(IActionBars bars) {
		IToolBarManager toolbar = bars.getToolBarManager();
		initToolbar(toolbar);
	}

	/**
	 * @param toolbar
	 */
	private void initToolbar(IToolBarManager toolbar) {
		DesignActionBarFactory factory = DesignActionBarFactory.getInstance();

		Action action = factory.getStyleAction(IHTMLConstants.TAG_U);
		toolbar.add(action);

		action = factory.getStyleAction(IHTMLConstants.TAG_B);
		toolbar.add(action);

		action = factory.getStyleAction(IHTMLConstants.TAG_I);
		toolbar.add(action);

		action = factory.getStyleAction(IHTMLConstants.TAG_SMALL);
		toolbar.add(action);

		action = factory.getStyleAction(IHTMLConstants.TAG_BIG);
		toolbar.add(action);
		// action = factory.getStyleAction(PARAGRAPH_ACTION_ID);
		// toolbar.add(action);
	}

	/**
	 * @param menuManager
	 * @param action
	 * @param id
	 */
	protected void addActionWithId(IMenuManager menuManager, Action action,
			String id) {
		action.setId(id);
		menuManager.add(action);
	}

	/**
	 * @param enabled
	 */
	public void setViewerSpecificContributionsEnabled(boolean enabled) {
		HTMLEditor htmlEditor = null;
		if (_editorPart instanceof HTMLEditor) {
			htmlEditor = (HTMLEditor) _editorPart;
		} else if (_editorPart instanceof SimpleGraphicalEditor) {
			htmlEditor = ((SimpleGraphicalEditor) _editorPart).getHTMLEditor();
		}

		if (htmlEditor == null)
			return;

		SimpleGraphicalEditor graphicalEditor = (SimpleGraphicalEditor) htmlEditor
				.getDesignViewer();
		IWorkbenchPartSite site = htmlEditor.getSite();
		if (site instanceof IEditorSite) {
			IActionBars actionBars = ((IEditorSite) site).getActionBars();

			if (enabled) {
				// // we always let the text editor to handle UNDO and REDO
				// actionBars.setGlobalActionHandler(ITextEditorActionConstants.UNDO,
				// textEditor
				// .getAction(ITextEditorActionConstants.UNDO));
				// actionBars.setGlobalActionHandler(ITextEditorActionConstants.REDO,
				// textEditor
				// .getAction(ITextEditorActionConstants.REDO));
				// lium: the above behavior changed, since we now use
				// DesignerUndoRedoAction.
				// see comments in DesignerUndoRedoAction
				actionBars.setGlobalActionHandler(
						ITextEditorActionConstants.UNDO, graphicalEditor
								.getAction(IWorkbenchCommandConstants.EDIT_UNDO));
				actionBars.setGlobalActionHandler(
						ITextEditorActionConstants.REDO, graphicalEditor
								.getAction(IWorkbenchCommandConstants.EDIT_REDO));

				// cut/copy/paste is delegated to design actions
				actionBars
						.setGlobalActionHandler(
								ITextEditorActionConstants.DELETE,
								graphicalEditor
										.getAction(IWorkbenchCommandConstants.EDIT_DELETE));
				actionBars.setGlobalActionHandler(
						ITextEditorActionConstants.CUT, graphicalEditor
								.getAction(IWorkbenchCommandConstants.EDIT_CUT));
				actionBars.setGlobalActionHandler(
						ITextEditorActionConstants.COPY, graphicalEditor
								.getAction(IWorkbenchCommandConstants.EDIT_COPY));
				actionBars
						.setGlobalActionHandler(
								ITextEditorActionConstants.PASTE,
								graphicalEditor
										.getAction(IWorkbenchCommandConstants.EDIT_PASTE));
			} else {
				actionBars.setGlobalActionHandler(
						ITextEditorActionConstants.UNDO, null);
				actionBars.setGlobalActionHandler(
						ITextEditorActionConstants.REDO, null);

				actionBars.setGlobalActionHandler(
						ITextEditorActionConstants.DELETE, null);
				actionBars.setGlobalActionHandler(
						ITextEditorActionConstants.CUT, null);
				actionBars.setGlobalActionHandler(
						ITextEditorActionConstants.COPY, null);
				actionBars.setGlobalActionHandler(
						ITextEditorActionConstants.PASTE, null);
			}
		}
	}

	/**
	 * The active editor passed in could be the following: HTMLEditor,
	 * SimpleGraphicalEditor, null.
	 */
	public void setActiveEditor(IEditorPart targetEditor) {
		_editorPart = targetEditor;

		// temp code.
		if (targetEditor instanceof SimpleGraphicalEditor) {
			IHTMLGraphicalViewer graphicalViewer = ((SimpleGraphicalEditor) targetEditor).getGraphicViewer();
			setViewerOnActions(graphicalViewer);
		} else if (targetEditor instanceof HTMLEditor) {
			//Bug 264080 - getDesignViewer may return null
			IDesignViewer designViewer = ((HTMLEditor) targetEditor).getDesignViewer();
			if (designViewer != null) {
				IHTMLGraphicalViewer graphicalViewer = designViewer.getGraphicViewer();
				setViewerOnActions(graphicalViewer);
			}
		} else {
			setViewerOnActions(null);
		}

		// TODO... uncomment this and investigate NPE
		//
		// add the cut/copy/paste for text fields
		// ActionHandlerPlugin.connectPart(editorPart);
	}

	private void setViewerOnActions(IHTMLGraphicalViewer viewer) {
		IContributionItem[] items = getActionBars().getToolBarManager()
				.getItems();
		if (items != null) {
			for (int i = 0; i < items.length; i++) {
				if (items[i] instanceof ActionContributionItem) {
					IAction action = ((ActionContributionItem) items[i])
							.getAction();
					if (action instanceof DesignerToolBarAction) {
						((DesignerToolBarAction) action).setViewer(viewer);
					}
				}
			}
		}

	}

	/**
	 * @see org.eclipse.ui.IEditorActionBarContributor#dispose()
	 */
	public void dispose() {
        // TODO: anything to dispose?
	}
}