| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation 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 API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.ui.actions; |
| |
| import org.eclipse.jface.text.ITextSelection; |
| |
| import org.eclipse.ui.help.WorkbenchHelp; |
| |
| import org.eclipse.jdt.core.ICompilationUnit; |
| import org.eclipse.jdt.core.JavaModelException; |
| |
| import org.eclipse.jdt.internal.ui.IJavaHelpContextIds; |
| import org.eclipse.jdt.internal.ui.actions.ActionUtil; |
| import org.eclipse.jdt.internal.ui.actions.SelectionConverter; |
| import org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor; |
| import org.eclipse.jdt.internal.ui.javaeditor.JavaTextSelection; |
| import org.eclipse.jdt.internal.ui.preferences.JavaPreferencesSettings; |
| import org.eclipse.jdt.internal.ui.refactoring.ExtractConstantWizard; |
| import org.eclipse.jdt.internal.ui.refactoring.RefactoringMessages; |
| import org.eclipse.jdt.internal.ui.refactoring.RefactoringWizard; |
| import org.eclipse.jdt.internal.ui.refactoring.actions.RefactoringStarter; |
| import org.eclipse.jdt.internal.ui.util.ExceptionHandler; |
| |
| import org.eclipse.jdt.internal.corext.refactoring.code.ExtractConstantRefactoring; |
| |
| /** |
| * Extracts an expression into a new local variable and replaces all occurrences of |
| * the expression with the local variable. |
| * |
| * <p> |
| * This class may be instantiated; it is not intended to be subclassed. |
| * </p> |
| * |
| * @since 2.1 |
| */ |
| public class ExtractConstantAction extends SelectionDispatchAction { |
| |
| private static final String DIALOG_MESSAGE_TITLE= RefactoringMessages.getString("ExtractConstantAction.extract_constant"); //$NON-NLS-1$ |
| private final CompilationUnitEditor fEditor; |
| |
| /** |
| * Note: This constructor is for internal use only. Clients should not call this constructor. |
| */ |
| public ExtractConstantAction(CompilationUnitEditor editor) { |
| super(editor.getEditorSite()); |
| setText(RefactoringMessages.getString("ExtractConstantAction.label")); //$NON-NLS-1$ |
| fEditor= editor; |
| setEnabled(SelectionConverter.getInputAsCompilationUnit(fEditor) != null); |
| WorkbenchHelp.setHelp(this, IJavaHelpContextIds.EXTRACT_CONSTANT_ACTION); |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on SelectionDispatchAction |
| */ |
| public void selectionChanged(ITextSelection selection) { |
| setEnabled(canEnable(selection)); |
| } |
| |
| private boolean canEnable(ITextSelection selection) { |
| return fEditor != null && SelectionConverter.getInputAsCompilationUnit(fEditor) != null; |
| } |
| |
| /** |
| * Note: This method is for internal use only. Clients should not call this method. |
| */ |
| public void selectionChanged(JavaTextSelection selection) { |
| setEnabled(canEnable(selection)); |
| } |
| |
| private boolean canEnable(JavaTextSelection selection) { |
| return (selection.resolveInInitializer() || selection.resolveInMethodBody()) && |
| ExtractConstantRefactoring.isAvailable(selection.resolveSelectedNodes(), selection.resolveCoveringNode()); |
| } |
| |
| |
| /* (non-Javadoc) |
| * Method declared on SelectionDispatchAction |
| */ |
| public void run(ITextSelection selection) { |
| if (!ActionUtil.isProcessable(getShell(), fEditor)) |
| return; |
| try{ |
| ExtractConstantRefactoring refactoring= createRefactoring(SelectionConverter.getInputAsCompilationUnit(fEditor), selection); |
| if (refactoring == null) |
| return; |
| new RefactoringStarter().activate(refactoring, createWizard(refactoring), getShell(), DIALOG_MESSAGE_TITLE, false); |
| } catch (JavaModelException e){ |
| ExceptionHandler.handle(e, DIALOG_MESSAGE_TITLE, RefactoringMessages.getString("NewTextRefactoringAction.exception")); //$NON-NLS-1$ |
| } |
| } |
| |
| private static ExtractConstantRefactoring createRefactoring(ICompilationUnit cunit, ITextSelection selection) { |
| return ExtractConstantRefactoring.create(cunit, selection.getOffset(), selection.getLength(), |
| JavaPreferencesSettings.getCodeGenerationSettings()); |
| } |
| |
| private static RefactoringWizard createWizard(ExtractConstantRefactoring refactoring) { |
| return new ExtractConstantWizard(refactoring); |
| } |
| } |