package net.sourceforge.phpeclipse.phpeditor;
/*******************************************************************************
 * Copyright (c) 2000, 2002 IBM Corp. and others. All rights reserved. This
 * program and the accompanying materials are made available under the terms of
 * the Common Public License v1.0 which accompanies this distribution, and is
 * available at http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors: IBM Corporation - Initial implementation Klaus Hartlage -
 * www.eclipseproject.de
 ******************************************************************************/
import net.sourceforge.phpeclipse.IPreferenceConstants;
import net.sourceforge.phpeclipse.PHPeclipsePlugin;
import net.sourceforge.phpeclipse.actions.PHPEclipseShowAction;
import net.sourceforge.phpeclipse.overlaypages.Util;
import net.sourceforge.phpeclipse.views.browser.BrowserView;

import org.eclipse.core.resources.IFile;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.ui.texteditor.TextEditorAction;
//import org.eclipse.update.internal.ui.UpdatePerspective;
//import org.eclipse.update.internal.ui.views.IEmbeddedWebBrowser;
/**
 * ClassDeclaration that defines the action for parsing the current PHP file
 */
public class ShowExternalPreviewAction extends TextEditorAction {
  private static ShowExternalPreviewAction instance = new ShowExternalPreviewAction();
  /**
   * Constructs and updates the action.
   */
  private ShowExternalPreviewAction() {
    super(PHPEditorMessages.getResourceBundle(), "ParserAction.", null); //$NON-NLS-1$
    update();
  }
  
public static ShowExternalPreviewAction getInstance() {
    return instance;
  }
  /**
   * Code called when the action is fired.
   */
  public void run() {
    IFile fileToParse = getFile();
    if (fileToParse == null) {
      // should never happen
      return;
    }
    boolean autoPreview = Util.getPreviewBooleanValue(fileToParse,
        IPreferenceConstants.PHP_AUTO_PREVIEW_DEFAULT);
    boolean bringToTopPreview = Util.getPreviewBooleanValue(fileToParse,
        IPreferenceConstants.PHP_BRING_TO_TOP_PREVIEW_DEFAULT);
    if (autoPreview) {
      String localhostURL;
      if ((localhostURL = PHPEclipseShowAction.getLocalhostURL(null,
          fileToParse)) == null) {
        return;
      }
      IWorkbenchPage page = PHPeclipsePlugin.getActivePage();
      try {
        IViewPart part = page.findView(BrowserView.ID_BROWSER);
        if (part == null) {
          part = page.showView(BrowserView.ID_BROWSER);
        } else {
          if (bringToTopPreview) {
            page.bringToTop(part);
          }
        }
        ((BrowserView) part).setUrl(localhostURL);
        
      } catch (PartInitException e) {
        PHPeclipsePlugin.log(e);
      }
    }
  }
  public void refresh() {
    IFile fileToParse = getFile();
    if (fileToParse == null) {
      // should never happen
      return;
    }
    boolean autoPreview = Util.getPreviewBooleanValue(fileToParse,
        IPreferenceConstants.PHP_AUTO_PREVIEW_DEFAULT);
    boolean bringToTopPreview = Util.getPreviewBooleanValue(fileToParse,
        IPreferenceConstants.PHP_BRING_TO_TOP_PREVIEW_DEFAULT);
    if (autoPreview) {
      IWorkbenchPage page = PHPeclipsePlugin.getActivePage();
      try {
        IViewPart part = page.findView(BrowserView.ID_BROWSER);
        if (part == null) {
          part = page.showView(BrowserView.ID_BROWSER);
        } else {
          if (bringToTopPreview) {
            page.bringToTop(part);
          }
        }
        ((BrowserView) part).refresh();
        
      } catch (PartInitException e) {
        PHPeclipsePlugin.log(e);
      }
    }
  }
  /**
   * Finds the file that's currently opened in the PHP Text Editor
   */
  protected IFile getFile() {
    ITextEditor editor = getTextEditor();
    IEditorInput editorInput = null;
    if (editor != null) {
      editorInput = editor.getEditorInput();
    }
    if (editorInput instanceof IFileEditorInput)
      return ((IFileEditorInput) editorInput).getFile();
    // if nothing was found, which should never happen
    return null;
  }
}