| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.util.List; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Shell; |
| |
| import org.eclipse.jface.text.DefaultInformationControl; |
| import org.eclipse.jface.text.IInformationControl; |
| import org.eclipse.jface.text.IInformationControlCreator; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.ITextHoverExtension; |
| import org.eclipse.jface.text.ITextViewer; |
| |
| import org.eclipse.ui.IEditorInput; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.PlatformUI; |
| import org.eclipse.ui.commands.ICommand; |
| import org.eclipse.ui.commands.ICommandManager; |
| import org.eclipse.ui.commands.IKeySequenceBinding; |
| import org.eclipse.ui.keys.KeySequence; |
| |
| import org.eclipse.jdt.core.ICodeAssist; |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.JavaModelException; |
| |
| import org.eclipse.jdt.internal.corext.util.Messages; |
| |
| import org.eclipse.jdt.ui.IWorkingCopyManager; |
| import org.eclipse.jdt.ui.PreferenceConstants; |
| import org.eclipse.jdt.ui.actions.IJavaEditorActionDefinitionIds; |
| import org.eclipse.jdt.ui.text.java.hover.IJavaEditorTextHover; |
| |
| import org.eclipse.jdt.internal.ui.JavaPlugin; |
| import org.eclipse.jdt.internal.ui.javaeditor.IClassFileEditorInput; |
| import org.eclipse.jdt.internal.ui.text.HTMLTextPresenter; |
| import org.eclipse.jdt.internal.ui.text.JavaWordFinder; |
| |
| /** |
| * Abstract class for providing hover information for Java elements. |
| * |
| * @since 2.1 |
| */ |
| public abstract class AbstractJavaEditorTextHover implements IJavaEditorTextHover, ITextHoverExtension { |
| |
| |
| private IEditorPart fEditor; |
| private ICommand fCommand; |
| { |
| ICommandManager commandManager= PlatformUI.getWorkbench().getCommandSupport().getCommandManager(); |
| fCommand= commandManager.getCommand(IJavaEditorActionDefinitionIds.SHOW_JAVADOC); |
| if (!fCommand.isDefined()) |
| fCommand= null; |
| } |
| |
| /* |
| * @see IJavaEditorTextHover#setEditor(IEditorPart) |
| */ |
| public void setEditor(IEditorPart editor) { |
| fEditor= editor; |
| } |
| |
| protected IEditorPart getEditor() { |
| return fEditor; |
| } |
| |
| protected ICodeAssist getCodeAssist() { |
| if (fEditor != null) { |
| IEditorInput input= fEditor.getEditorInput(); |
| if (input instanceof IClassFileEditorInput) { |
| IClassFileEditorInput cfeInput= (IClassFileEditorInput) input; |
| return cfeInput.getClassFile(); |
| } |
| |
| IWorkingCopyManager manager= JavaPlugin.getDefault().getWorkingCopyManager(); |
| return manager.getWorkingCopy(input); |
| } |
| |
| return null; |
| } |
| |
| /* |
| * @see ITextHover#getHoverRegion(ITextViewer, int) |
| */ |
| public IRegion getHoverRegion(ITextViewer textViewer, int offset) { |
| return JavaWordFinder.findWord(textViewer.getDocument(), offset); |
| } |
| |
| /* |
| * @see ITextHover#getHoverInfo(ITextViewer, IRegion) |
| */ |
| public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) { |
| |
| ICodeAssist resolve= getCodeAssist(); |
| if (resolve != null) { |
| try { |
| IJavaElement[] result= null; |
| |
| synchronized (resolve) { |
| result= resolve.codeSelect(hoverRegion.getOffset(), hoverRegion.getLength()); |
| } |
| |
| if (result == null) |
| return null; |
| |
| int nResults= result.length; |
| if (nResults == 0) |
| return null; |
| |
| return getHoverInfo(result); |
| |
| } catch (JavaModelException x) { |
| return null; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Provides hover information for the given Java elements. |
| * |
| * @param javaElements the Java elements for which to provide hover information |
| * @return the hover information string |
| * @since 2.1 |
| */ |
| protected String getHoverInfo(IJavaElement[] javaElements) { |
| return null; |
| } |
| |
| /* |
| * @see ITextHoverExtension#getHoverControlCreator() |
| * @since 3.0 |
| */ |
| public IInformationControlCreator getHoverControlCreator() { |
| return new IInformationControlCreator() { |
| public IInformationControl createInformationControl(Shell parent) { |
| return new DefaultInformationControl(parent, SWT.NONE, new HTMLTextPresenter(true), getTooltipAffordanceString()); |
| } |
| }; |
| } |
| |
| /** |
| * Returns the tool tip affordance string. |
| * |
| * @return the affordance string or <code>null</code> if disabled or no key binding is defined |
| * @since 3.0 |
| */ |
| protected String getTooltipAffordanceString() { |
| if (!JavaPlugin.getDefault().getPreferenceStore().getBoolean(PreferenceConstants.EDITOR_SHOW_TEXT_HOVER_AFFORDANCE)) |
| return null; |
| |
| KeySequence[] sequences= getKeySequences(); |
| if (sequences == null) |
| return null; |
| |
| String keySequence= sequences[0].format(); |
| return Messages.format(JavaHoverMessages.JavaTextHover_makeStickyHint, keySequence == null ? "" : keySequence); //$NON-NLS-1$ |
| } |
| |
| /** |
| * Returns the array of valid key sequence bindings for the |
| * show tool tip description command. |
| * |
| * @return the array with the {@link KeySequence}s |
| * |
| * @since 3.0 |
| */ |
| private KeySequence[] getKeySequences() { |
| if (fCommand != null) { |
| List list= fCommand.getKeySequenceBindings(); |
| if (!list.isEmpty()) { |
| KeySequence[] keySequences= new KeySequence[list.size()]; |
| for (int i= 0; i < keySequences.length; i++) { |
| keySequences[i]= ((IKeySequenceBinding) list.get(i)).getKeySequence(); |
| } |
| return keySequences; |
| } |
| } |
| return null; |
| } |
| } |