| /******************************************************************************* |
| * Copyright (c) 2000, 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.jdt.internal.ui.text.java.hover; |
| |
| import java.io.IOException; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Shell; |
| |
| import org.eclipse.jface.text.Document; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IInformationControl; |
| import org.eclipse.jface.text.IInformationControlCreator; |
| import org.eclipse.jface.text.ITextHoverExtension; |
| import org.eclipse.jface.text.information.IInformationProviderExtension2; |
| |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.part.IWorkbenchPartOrientation; |
| |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.ILocalVariable; |
| import org.eclipse.jdt.core.IMember; |
| import org.eclipse.jdt.core.ISourceReference; |
| import org.eclipse.jdt.core.ITypeParameter; |
| import org.eclipse.jdt.core.JavaModelException; |
| |
| import org.eclipse.jdt.internal.corext.codemanipulation.StubUtility; |
| import org.eclipse.jdt.internal.corext.util.Strings; |
| |
| import org.eclipse.jdt.internal.ui.JavaPlugin; |
| import org.eclipse.jdt.internal.ui.text.JavaCodeReader; |
| |
| /** |
| * Provides source as hover info for Java elements. |
| */ |
| public class JavaSourceHover extends AbstractJavaEditorTextHover implements ITextHoverExtension, IInformationProviderExtension2 { |
| |
| /* |
| * @see JavaElementHover |
| */ |
| protected String getHoverInfo(IJavaElement[] result) { |
| int nResults= result.length; |
| |
| if (nResults > 1) |
| return null; |
| |
| IJavaElement curr= result[0]; |
| if ((curr instanceof IMember || curr instanceof ILocalVariable || curr instanceof ITypeParameter) && curr instanceof ISourceReference) { |
| try { |
| String source= ((ISourceReference) curr).getSource(); |
| if (source == null) |
| return null; |
| |
| source= removeLeadingComments(source); |
| String delim= StubUtility.getLineDelimiterUsed(result[0]); |
| |
| String[] sourceLines= Strings.convertIntoLines(source); |
| String firstLine= sourceLines[0]; |
| if (!Character.isWhitespace(firstLine.charAt(0))) |
| sourceLines[0]= ""; //$NON-NLS-1$ |
| Strings.trimIndentation(sourceLines, curr.getJavaProject()); |
| |
| if (!Character.isWhitespace(firstLine.charAt(0))) |
| sourceLines[0]= firstLine; |
| |
| source= Strings.concatenate(sourceLines, delim); |
| |
| return source; |
| |
| } catch (JavaModelException ex) { |
| } |
| } |
| |
| return null; |
| } |
| |
| private String removeLeadingComments(String source) { |
| JavaCodeReader reader= new JavaCodeReader(); |
| IDocument document= new Document(source); |
| int i; |
| try { |
| reader.configureForwardReader(document, 0, document.getLength(), true, false); |
| int c= reader.read(); |
| while (c != -1 && (c == '\r' || c == '\n')) { |
| c= reader.read(); |
| } |
| i= reader.getOffset(); |
| reader.close(); |
| } catch (IOException ex) { |
| i= 0; |
| } finally { |
| try { |
| if (reader != null) |
| reader.close(); |
| } catch (IOException ex) { |
| JavaPlugin.log(ex); |
| } |
| } |
| |
| if (i < 0) |
| return source; |
| return source.substring(i); |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.ITextHoverExtension#getHoverControlCreator() |
| * @since 3.0 |
| */ |
| public IInformationControlCreator getHoverControlCreator() { |
| return new IInformationControlCreator() { |
| public IInformationControl createInformationControl(Shell parent) { |
| IEditorPart editor= getEditor(); |
| int shellStyle= SWT.TOOL | SWT.NO_TRIM; |
| if (editor instanceof IWorkbenchPartOrientation) |
| shellStyle |= ((IWorkbenchPartOrientation)editor).getOrientation(); |
| return new SourceViewerInformationControl(parent, shellStyle, SWT.NONE, getTooltipAffordanceString()); |
| } |
| }; |
| } |
| |
| /* |
| * @see IInformationProviderExtension2#getInformationPresenterControlCreator() |
| * @since 3.0 |
| */ |
| public IInformationControlCreator getInformationPresenterControlCreator() { |
| return new IInformationControlCreator() { |
| public IInformationControl createInformationControl(Shell parent) { |
| int style= SWT.V_SCROLL | SWT.H_SCROLL; |
| int shellStyle= SWT.RESIZE | SWT.TOOL; |
| IEditorPart editor= getEditor(); |
| if (editor instanceof IWorkbenchPartOrientation) |
| shellStyle |= ((IWorkbenchPartOrientation)editor).getOrientation(); |
| return new SourceViewerInformationControl(parent, shellStyle, style); |
| } |
| }; |
| } |
| } |