Java tutorial
/******************************************************************************* * 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; import org.eclipse.core.resources.IFile; import org.eclipse.core.runtime.CoreException; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.text.Document; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.IRegion; import org.eclipse.jface.text.Region; import org.eclipse.jface.text.source.SourceViewer; import org.eclipse.ltk.core.refactoring.RefactoringStatusContext; import org.eclipse.ltk.ui.refactoring.TextStatusContextViewer; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Composite; import org.eclipse.ui.IEditorInput; import org.eclipse.ui.part.FileEditorInput; import org.eclipse.ui.texteditor.IDocumentProvider; import org.eclipse.wst.jsdt.core.IClassFile; import org.eclipse.wst.jsdt.core.IJavaScriptUnit; import org.eclipse.wst.jsdt.core.IJavaScriptElement; import org.eclipse.wst.jsdt.core.IPackageFragmentRoot; import org.eclipse.wst.jsdt.core.ISourceRange; import org.eclipse.wst.jsdt.core.JavaScriptModelException; import org.eclipse.wst.jsdt.internal.corext.refactoring.base.JavaStatusContext; import org.eclipse.wst.jsdt.internal.corext.refactoring.base.JavaStringStatusContext; import org.eclipse.wst.jsdt.internal.corext.util.Messages; import org.eclipse.wst.jsdt.internal.ui.JavaScriptPlugin; import org.eclipse.wst.jsdt.internal.ui.javaeditor.InternalClassFileEditorInput; import org.eclipse.wst.jsdt.internal.ui.javaeditor.JavaSourceViewer; import org.eclipse.wst.jsdt.ui.PreferenceConstants; import org.eclipse.wst.jsdt.ui.text.JavaScriptSourceViewerConfiguration; import org.eclipse.wst.jsdt.ui.text.JavaScriptTextTools; public class JavaStatusContextViewer extends TextStatusContextViewer { /* (non-Javadoc) * @see org.eclipse.wst.jsdt.internal.ui.refactoring.IStatusContextViewer#createControl(org.eclipse.swt.widgets.Composite) */ public void createControl(Composite parent) { super.createControl(parent); final SourceViewer viewer = getSourceViewer(); viewer.unconfigure(); IPreferenceStore store = JavaScriptPlugin.getDefault().getCombinedPreferenceStore(); viewer.configure(new JavaScriptSourceViewerConfiguration( JavaScriptPlugin.getDefault().getJavaTextTools().getColorManager(), store, null, null)); viewer.getControl().setFont(JFaceResources.getFont(PreferenceConstants.EDITOR_TEXT_FONT)); } protected SourceViewer createSourceViewer(Composite parent) { IPreferenceStore store = JavaScriptPlugin.getDefault().getCombinedPreferenceStore(); return new JavaSourceViewer(parent, null, null, false, SWT.LEFT_TO_RIGHT | SWT.V_SCROLL | SWT.H_SCROLL | SWT.MULTI | SWT.FULL_SELECTION, store); } private IPackageFragmentRoot getPackageFragmentRoot(IClassFile file) { IJavaScriptElement element = file.getParent(); while (element != null && element.getElementType() != IJavaScriptElement.PACKAGE_FRAGMENT_ROOT) element = element.getParent(); return (IPackageFragmentRoot) element; } public void setInput(RefactoringStatusContext context) { if (context instanceof JavaStatusContext) { JavaStatusContext jsc = (JavaStatusContext) context; IDocument document = null; if (jsc.isBinary()) { IClassFile file = jsc.getClassFile(); IEditorInput editorInput = new InternalClassFileEditorInput(file); document = getDocument(JavaScriptPlugin.getDefault().getClassFileDocumentProvider(), editorInput); if (document.getLength() == 0) document = new Document( Messages.format(RefactoringMessages.JavaStatusContextViewer_no_source_found0, getPackageFragmentRoot(file).getElementName())); updateTitle(file); } else { IJavaScriptUnit cunit = jsc.getCompilationUnit(); if (cunit.isWorkingCopy()) { try { document = newJavaDocument(cunit.getSource()); } catch (JavaScriptModelException e) { // document is null which is a valid input. } } else { IEditorInput editorInput = new FileEditorInput((IFile) cunit.getResource()); document = getDocument(JavaScriptPlugin.getDefault().getCompilationUnitDocumentProvider(), editorInput); } if (document == null) document = new Document(RefactoringMessages.JavaStatusContextViewer_no_source_available); updateTitle(cunit); } setInput(document, createRegion(jsc.getSourceRange())); } else if (context instanceof JavaStringStatusContext) { updateTitle(null); JavaStringStatusContext sc = (JavaStringStatusContext) context; setInput(newJavaDocument(sc.getSource()), createRegion(sc.getSourceRange())); } } private IDocument newJavaDocument(String source) { IDocument result = new Document(source); JavaScriptTextTools textTools = JavaScriptPlugin.getDefault().getJavaTextTools(); textTools.setupJavaDocumentPartitioner(result); return result; } private static IRegion createRegion(ISourceRange range) { return new Region(range.getOffset(), range.getLength()); } private IDocument getDocument(IDocumentProvider provider, IEditorInput input) { if (input == null) return null; IDocument result = null; try { provider.connect(input); result = provider.getDocument(input); } catch (CoreException e) { } finally { provider.disconnect(input); } return result; } }