content: /*******************************************************************************
   * Copyright (c) 2000, 2008 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.jsdt.internal.ui.refactoring.actions;
  
  import org.eclipse.core.runtime.Assert;
  import org.eclipse.jface.dialogs.MessageDialog;
  import org.eclipse.jface.text.ITextSelection;
  import org.eclipse.jface.viewers.IStructuredSelection;
  import org.eclipse.swt.widgets.Shell;
  import org.eclipse.ui.IWorkbenchSite;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.wst.jsdt.core.IFunction;
  import org.eclipse.wst.jsdt.core.ISourceRange;
  import org.eclipse.wst.jsdt.core.ITypeRoot;
  import org.eclipse.wst.jsdt.core.JavaScriptModelException;
  import org.eclipse.wst.jsdt.core.dom.JavaScriptUnit;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.RefactoringAvailabilityTester;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.RefactoringExecutionStarter;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.util.JavaElementUtil;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.util.RefactoringASTParser;
  import org.eclipse.wst.jsdt.internal.corext.util.JavaModelUtil;
  import org.eclipse.wst.jsdt.internal.ui.IJavaHelpContextIds;
  import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin;
  import org.eclipse.wst.jsdt.internal.ui.actions.ActionUtil;
  import org.eclipse.wst.jsdt.internal.ui.actions.SelectionConverter;
  import org.eclipse.wst.jsdt.internal.ui.javaeditor.JavaEditor;
  import org.eclipse.wst.jsdt.internal.ui.javaeditor.JavaTextSelection;
  import org.eclipse.wst.jsdt.internal.ui.refactoring.RefactoringMessages;
  import org.eclipse.wst.jsdt.internal.ui.util.ExceptionHandler;
  import org.eclipse.wst.jsdt.ui.actions.SelectionDispatchAction;
  
  /**
   * Inlines a method.
   * 
   * <p>
   * This class may be instantiated; it is not intended to be subclassed.
   * </p>
   */
  public class InlineMethodAction extends SelectionDispatchAction {
  
  	private JavaEditor fEditor;
  	
  	/**
  	 * Note: This constructor is for internal use only. Clients should not call this constructor.
  	 * @param editor the java editor
  	 */
  	public InlineMethodAction(JavaEditor editor) {
  		this(editor.getEditorSite());
  		fEditor= editor;
  		setEnabled(SelectionConverter.canOperateOn(fEditor));
  	}
  
  	public InlineMethodAction(IWorkbenchSite site) {
  		super(site);
  		setText(RefactoringMessages.InlineMethodAction_inline_Method); 
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.INLINE_ACTION);
  	}
  
  	//---- structured selection ----------------------------------------------
  	
  	/*
  	 * @see SelectionDispatchAction#selectionChanged(IStructuredSelection)
  	 */
  	public void selectionChanged(IStructuredSelection selection) {
  		try {
  			setEnabled(RefactoringAvailabilityTester.isInlineMethodAvailable(selection));
  		} catch (JavaScriptModelException e) {
  			if (JavaModelUtil.isExceptionToBeLogged(e))
  				JavaScriptPlugin.log(e);
  		}
  	}
  
  	/*
  	 * @see SelectionDispatchAction#run(IStructuredSelection)
  	 */
  	public void run(IStructuredSelection selection) {
  		try {
  			Assert.isTrue(RefactoringAvailabilityTester.isInlineMethodAvailable(selection));
  			IFunction method= (IFunction) selection.getFirstElement();
  			ISourceRange nameRange= method.getNameRange();
  			run(nameRange.getOffset(), nameRange.getLength(), method.getTypeRoot());
  		} catch (JavaScriptModelException e) {
  			ExceptionHandler.handle(e, getShell(), RefactoringMessages.InlineMethodAction_dialog_title, RefactoringMessages.InlineMethodAction_unexpected_exception); 
  		}
  	}
  
  	/*
  	 * @see SelectionDispatchAction#selectionChanged(ITextSelection)
  	 */
  	public void selectionChanged(ITextSelection selection) {
  		setEnabled(true);
  	}
  	
  	/**
  	 * Note: This method is for internal use only. Clients should not call this method.
  	 * @param selection 
  	 */
  	public void selectionChanged(JavaTextSelection selection) {
  		try {
  			setEnabled(RefactoringAvailabilityTester.isInlineMethodAvailable(selection));
  		} catch (JavaScriptModelException e) {
  			setEnabled(false);
  		}
  	}
  	
  	/* (non-Javadoc)
  	 * Method declared on SelectionDispatchAction
  	 */		
  	public void run(ITextSelection selection) {
  		ITypeRoot typeRoot= SelectionConverter.getInputAsTypeRoot(fEditor);
  		if (typeRoot == null)
  			return;
  		if (! JavaElementUtil.isSourceAvailable(typeRoot))
  			return;
  		run(selection.getOffset(), selection.getLength(), typeRoot);
  	}
  
  	private void run(int offset, int length, ITypeRoot typeRoot) {
  		if (!ActionUtil.isEditable(fEditor, getShell(), typeRoot))
  			return;
  		try {
  			JavaScriptUnit compilationUnit= RefactoringASTParser.parseWithASTProvider(typeRoot, true, null);
  			if (! RefactoringExecutionStarter.startInlineMethodRefactoring(typeRoot, compilationUnit, offset, length, getShell())) {
  				MessageDialog.openInformation(getShell(), RefactoringMessages.InlineMethodAction_dialog_title, RefactoringMessages.InlineMethodAction_no_method_invocation_or_declaration_selected);
  			}
  		} catch (JavaScriptModelException e) {
  			ExceptionHandler.handle(e, getShell(), RefactoringMessages.InlineMethodAction_dialog_title, RefactoringMessages.InlineMethodAction_unexpected_exception); 
  		}
  	}
  
  	public boolean tryInlineMethod(ITypeRoot typeRoot, JavaScriptUnit node, ITextSelection selection, Shell shell) {
  		try {
  			if (RefactoringExecutionStarter.startInlineMethodRefactoring(typeRoot, node, selection.getOffset(), selection.getLength(), shell)) {
  				return true;
  			}
  		} catch (JavaScriptModelException exception) {
  			JavaScriptPlugin.log(exception);
  		}
  		return false;
  	}
  }
  