Package org.eclipse.php.internal.ui.actions

Source Code of org.eclipse.php.internal.ui.actions.OpenAction

/*******************************************************************************
* Copyright (c) 2009 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
*     Zend Technologies
*******************************************************************************/
package org.eclipse.php.internal.ui.actions;

import java.util.Iterator;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.dltk.core.IModelElement;
import org.eclipse.dltk.core.ISourceModule;
import org.eclipse.dltk.core.ISourceReference;
import org.eclipse.dltk.core.ModelException;
import org.eclipse.dltk.internal.ui.editor.EditorUtility;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.util.OpenStrategy;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.php.internal.ui.Logger;
import org.eclipse.php.internal.ui.PHPUIMessages;
import org.eclipse.php.internal.ui.editor.PHPStructuredEditor;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.ui.IWorkbenchSite;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.internal.ide.IIDEHelpContextIds;
import org.eclipse.ui.texteditor.IEditorStatusLine;

public class OpenAction extends SelectionDispatchAction {

  private PHPStructuredEditor fEditor;

  /**
   * Creates a new <code>OpenAction</code>. The action requires that the
   * selection provided by the site's selection provider is of type <code>
   * org.eclipse.jface.viewers.IStructuredSelection</code> .
   *
   * @param site
   *            the site providing context information for this action
   */
  public OpenAction(IWorkbenchSite site) {
    super(site);
    setText(PHPUIMessages.OpenAction_label);
    setToolTipText(PHPUIMessages.OpenAction_tooltip);
    setDescription(PHPUIMessages.OpenAction_description);
    PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
        IIDEHelpContextIds.OPEN_RESOURCE_ACTION);
  }

  /**
   * Note: This constructor is for internal use only. Clients should not call
   * this constructor.
   *
   * @param editor
   *            the Script editor
   */
  public OpenAction(PHPStructuredEditor editor) {
    this(editor.getEditorSite());
    fEditor = editor;
    setEnabled(EditorUtility.getEditorInputModelElement(fEditor, false) != null);
  }

  /*
   * We override this function since we've changed isEnabled() to check its
   * status according to the selection
   */
  public void selectionChanged(ITextSelection selection) {
  }

  /*
   * We override this function since we've changed isEnabled() to check its
   * status according to the selection
   */
  public void selectionChanged(IStructuredSelection selection) {
    setEnabled(checkEnabled(selection));
  }

  private boolean checkEnabled(IStructuredSelection selection) {
    if (selection.isEmpty())
      return false;
    for (Iterator<?> iter = selection.iterator(); iter.hasNext();) {
      Object element = iter.next();
      if (!checkElement(element)) {
        return false;
      }
    }
    return true;
  }

  protected boolean checkElement(Object element) {
    if ((element instanceof ISourceReference)
        || ((element instanceof IAdaptable) && (((IAdaptable) element)
            .getAdapter(ISourceReference.class) != null)))
      return true;
    if ((element instanceof IFile)
        || ((element instanceof IAdaptable) && (((IAdaptable) element)
            .getAdapter(IFile.class) != null)))
      return true;
    if ((element instanceof IStorage)
        || ((element instanceof IAdaptable) && (((IAdaptable) element)
            .getAdapter(IStorage.class) != null)))
      return true;
    return false;
  }

  /*
   * (non-Javadoc) Method declared on SelectionDispatchAction.
   */
  public void run(ITextSelection selection) {
    if (!ActionUtils.isProcessable(getShell(), fEditor))
      return;
    // TODO open in a dialog ? with these parameters: getShell(),
    // getDialogTitle(),
    // PHPUIMessages.getString("OpenAction_select_element")
    IModelElement[] element = null;
    try {
      element = SelectionConverter.codeResolve(fEditor);
    } catch (ModelException e) {
      Logger.logException(e);
    }
    if (element == null) {
      IEditorStatusLine statusLine = (IEditorStatusLine) fEditor
          .getAdapter(IEditorStatusLine.class);
      if (statusLine != null)
        statusLine.setMessage(true,
            PHPUIMessages.OpenAction_error_messageBadSelection,
            null);
      getShell().getDisplay().beep();
      return;
    }

    run(new Object[] { element }, null);
  }

  /*
   * (non-Javadoc) Method declared on SelectionDispatchAction.
   */
  public void run(IStructuredSelection selection) {
    if (!checkEnabled(selection))
      return;
    run(selection.toArray(), ((TreeViewer) getSelectionProvider())
        .getTree().getSelection());
  }

  /**
   * Note: this method is for internal use only. Clients should not call this
   * method.
   *
   * @param elements
   *            the elements to process
   */
  public void run(Object[] elements, Object[] treeNodes) {
    if (elements == null)
      return;
    for (int i = 0; i < elements.length; i++) {
      Object element = elements[i];
      try {
        element = getElementToOpen(element);
        boolean activateOnOpen = fEditor != null ? true : OpenStrategy
            .activateOnOpen();
        if (element instanceof ISourceModule && treeNodes != null) {
          Object o = treeNodes[i];
          if (o instanceof TreeItem) {
            TreeItem item = (TreeItem) o;
            o = item.getData();
          }
          OpenActionUtil.open(o, activateOnOpen);
        } else {
          OpenActionUtil.open(element, activateOnOpen);
        }
      } catch (PartInitException x) {
        MessageDialog.openError(getShell(),
            PHPUIMessages.OpenAction_error_messageProblems, ""); //$NON-NLS-1$
      } catch (ModelException e) {
        MessageDialog.openError(getShell(),
            PHPUIMessages.OpenAction_error_messageProblems, ""); //$NON-NLS-1$
      }
    }
  }

  /**
   * Note: this method is for internal use only. Clients should not call this
   * method.
   *
   * @param object
   *            the element to open
   * @return the real element to open
   */
  public Object getElementToOpen(Object object) {
    return object;
  }

  private String getDialogTitle() {
    return PHPUIMessages.OpenAction_error_title;
  }

}
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