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.ui.actions;
  
  import org.eclipse.core.runtime.Assert;
  import org.eclipse.jface.dialogs.MessageDialog;
  import org.eclipse.jface.text.ITextSelection;
  import org.eclipse.jface.viewers.ISelection;
  import org.eclipse.jface.viewers.IStructuredSelection;
  import org.eclipse.ui.IWorkbenchSite;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
  import org.eclipse.wst.jsdt.core.ITypeRoot;
  import org.eclipse.wst.jsdt.core.dom.JavaScriptUnit;
  import org.eclipse.wst.jsdt.internal.corext.refactoring.util.RefactoringASTParser;
  import org.eclipse.wst.jsdt.internal.ui.IJavaHelpContextIds;
  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.refactoring.RefactoringMessages;
  import org.eclipse.wst.jsdt.internal.ui.refactoring.actions.InlineConstantAction;
  import org.eclipse.wst.jsdt.internal.ui.refactoring.actions.InlineMethodAction;
  
  /**
   * Inlines a method, local variable or a static final field.
   *
   * <p>
   * This class may be instantiated; it is not intended to be subclassed.
   * </p>
   * 
   *
   * Provisional API: This class/interface is part of an interim API that is still under development and expected to
   * change significantly before reaching stability. It is being made available at this early stage to solicit feedback
   * from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken
   * (repeatedly) as the API evolves.
   */
  public class InlineAction extends SelectionDispatchAction {
  
  	private JavaEditor fEditor;
  	private final InlineTempAction fInlineTemp;
  	private final InlineMethodAction fInlineMethod;
  	private final InlineConstantAction fInlineConstant;
  
  	/**
  	 * Creates a new <code>InlineAction</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 InlineAction(IWorkbenchSite site) {
  		super(site);
  		setText(RefactoringMessages.InlineAction_Inline); 
  		fInlineTemp		= new InlineTempAction(site);
  		fInlineConstant	= new InlineConstantAction(site);
  		fInlineMethod	= new InlineMethodAction(site);
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.INLINE_ACTION);
  	}
  
  	/**
  	 * Note: This constructor is for internal use only. Clients should not call this constructor.
  	 * @param editor the compilation unit editor
  	 */
  	public InlineAction(JavaEditor editor) {
  		//don't want to call 'this' here - it'd create useless action objects
  		super(editor.getEditorSite());
  		setText(RefactoringMessages.InlineAction_Inline); 
  		fEditor= editor;
  		fInlineTemp		= new InlineTempAction(editor);
  		fInlineConstant	= new InlineConstantAction(editor);
  		fInlineMethod	= new InlineMethodAction(editor);
  		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.INLINE_ACTION);
  		setEnabled(SelectionConverter.getInputAsCompilationUnit(fEditor) != null);
  	}
  
  	/*
  	 * @see org.eclipse.wst.jsdt.ui.actions.SelectionDispatchAction#selectionChanged(org.eclipse.jface.viewers.ISelection)
  	 */
  	public void selectionChanged(ISelection selection) {
  		fInlineConstant.update(selection);
  		fInlineMethod.update(selection);
  		fInlineTemp.update(selection);
  		setEnabled((fInlineTemp.isEnabled() || fInlineConstant.isEnabled() || fInlineMethod.isEnabled()));
  	}
  
  	/*
  	 * @see org.eclipse.wst.jsdt.ui.actions.SelectionDispatchAction#run(org.eclipse.jface.text.ITextSelection)
  	 */
  	public void run(ITextSelection selection) {
  		if (!ActionUtil.isEditable(fEditor))
  			return;
  
  		ITypeRoot typeRoot= SelectionConverter.getInputAsTypeRoot(fEditor);
  		if (typeRoot == null)
  			return;
  
  		JavaScriptUnit node= RefactoringASTParser.parseWithASTProvider(typeRoot, true, null);
  		
  		if (typeRoot instanceof IJavaScriptUnit) {
  			IJavaScriptUnit cu= (IJavaScriptUnit) typeRoot;
  			if (fInlineTemp.isEnabled() && fInlineTemp.tryInlineTemp(cu, node, selection, getShell()))
  				return;
  
  			if (fInlineConstant.isEnabled() && fInlineConstant.tryInlineConstant(cu, node, selection, getShell()))
  				return;
  		}
  		//InlineMethod is last (also tries enclosing element):
  		if (fInlineMethod.isEnabled() && fInlineMethod.tryInlineMethod(typeRoot, node, selection, getShell()))
  			return;
  
  		MessageDialog.openInformation(getShell(), RefactoringMessages.InlineAction_dialog_title, RefactoringMessages.InlineAction_select); 
  	}
  	
  	/*
  	 * @see org.eclipse.wst.jsdt.ui.actions.SelectionDispatchAction#run(org.eclipse.jface.viewers.IStructuredSelection)
  	 */
  	public void run(IStructuredSelection selection) {
  		if (fInlineConstant.isEnabled())
  			fInlineConstant.run(selection);
  		else if (fInlineMethod.isEnabled())
  			fInlineMethod.run(selection);
  		else	
  			//inline temp will never be enabled on IStructuredSelection
  			//don't bother running it
  			Assert.isTrue(! fInlineTemp.isEnabled());
  	}
  }
  