Package org.eclipse.jst.jsp.ui.internal.java.refactoring

Source Code of org.eclipse.jst.jsp.ui.internal.java.refactoring.JSPJavaSelectionProvider

/*******************************************************************************
* Copyright (c) 2001, 2006 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.jst.jsp.ui.internal.java.refactoring;

import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.ITextSelection;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jst.jsp.core.internal.java.IJSPTranslation;
import org.eclipse.jst.jsp.core.internal.java.JSPTranslation;
import org.eclipse.jst.jsp.core.internal.java.JSPTranslationAdapter;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.wst.sse.core.StructuredModelManager;
import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMDocument;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;

class JSPJavaSelectionProvider {
  static IJavaElement[] getSelection(ITextEditor textEditor) {
    IJavaElement[] elements = null;

    IDocument document = textEditor.getDocumentProvider().getDocument(textEditor.getEditorInput());
    ISelection selection = textEditor.getSelectionProvider().getSelection();
    if (selection instanceof ITextSelection) {
      ITextSelection textSelection = (ITextSelection) selection;
      // get the JSP translation object for this editor's document
      IStructuredModel model = StructuredModelManager.getModelManager().getExistingModelForRead(document);
      try {
        if (model instanceof IDOMModel) {
          IDOMModel xmlModel = (IDOMModel)model;
          IDOMDocument xmlDoc = xmlModel.getDocument();

          JSPTranslationAdapter adapter = (JSPTranslationAdapter) xmlDoc.getAdapterFor(IJSPTranslation.class);
          if (adapter != null) {
            JSPTranslation translation = adapter.getJSPTranslation();
            elements = translation.getElementsFromJspRange(textSelection.getOffset(), textSelection.getOffset() + textSelection.getLength());
          }
        }
      }
      finally {
        if (model != null)
          model.releaseFromRead();
      }
    }
    if (elements == null) {
      elements = new IJavaElement[0];
    }
    return elements;
  }

}
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