| /******************************************************************************* |
| * Copyright (c) 2010 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.debug.internal.ui.eval; |
| |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IAdapterManager; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.debug.core.DebugEvent; |
| import org.eclipse.debug.core.DebugException; |
| import org.eclipse.debug.core.DebugPlugin; |
| import org.eclipse.debug.core.IDebugEventSetListener; |
| import org.eclipse.debug.core.model.IStackFrame; |
| import org.eclipse.debug.core.model.IThread; |
| import org.eclipse.debug.ui.actions.IRunToLineTarget; |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.ITextSelection; |
| import org.eclipse.jface.text.TextSelection; |
| import org.eclipse.jface.viewers.ISelection; |
| import org.eclipse.ui.IEditorActionDelegate; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.IWorkbenchWindow; |
| import org.eclipse.ui.IWorkbenchWindowActionDelegate; |
| import org.eclipse.ui.texteditor.IEditorStatusLine; |
| import org.eclipse.ui.texteditor.ITextEditor; |
| import org.eclipse.wst.jsdt.core.IFunction; |
| import org.eclipse.wst.jsdt.core.IJavaScriptElement; |
| import org.eclipse.wst.jsdt.core.JavaScriptModelException; |
| import org.eclipse.wst.jsdt.debug.core.model.IJavaScriptStackFrame; |
| import org.eclipse.wst.jsdt.debug.core.model.IJavaScriptThread; |
| import org.eclipse.wst.jsdt.debug.internal.ui.JavaScriptDebugUIPlugin; |
| |
| /** |
| * Steps into the selected function. |
| * |
| * @since 1.0 |
| */ |
| public class StepIntoSelectionActionDelegate implements IEditorActionDelegate, IWorkbenchWindowActionDelegate { |
| |
| private IEditorPart editor = null; |
| private IWorkbenchWindow window = null; |
| private IRegion region = null; |
| |
| /** |
| * Default constructor |
| */ |
| public StepIntoSelectionActionDelegate() {} |
| |
| /** |
| * Constructor |
| * @param region |
| */ |
| public StepIntoSelectionActionDelegate(IRegion region) { |
| this.region = region; |
| } |
| |
| /** |
| * The line number being "run to." |
| */ |
| private int line = -1; |
| |
| /** |
| * The debug event list listener used to know when a run to line has finished. |
| * @see StepIntoSelectionActionDelegate#runToLineBeforeStepIn(ITextSelection, IJavaScriptStackFrame, IFunction) |
| */ |
| private IDebugEventSetListener listener = null; |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction) |
| */ |
| public void run(IAction action) { |
| IJavaScriptStackFrame frame = getStackFrame(); |
| if (frame == null || !frame.isSuspended()) { |
| // no longer suspended - unexpected |
| return; |
| } |
| ITextSelection textSelection = getTextSelection(); |
| try { |
| IEditorPart activeEditor = getActiveEditor(); |
| IJavaScriptElement javaElement= StepIntoSelectionUtils.getJavaElement(activeEditor.getEditorInput()); |
| IFunction function = StepIntoSelectionUtils.getFunction(textSelection, javaElement); |
| if (function == null) { |
| function = StepIntoSelectionUtils.getFirstFunctionOnLine(textSelection.getOffset(), activeEditor, javaElement); |
| } |
| int lineNumber = frame.getLineNumber(); |
| if (textSelection.getStartLine() == (lineNumber - 1)) { |
| doStepIn(frame, function); |
| } else { |
| runToLineBeforeStepIn(textSelection, frame.getThread(), function); |
| return; |
| } |
| } |
| catch (DebugException e) { |
| showErrorMessage(e.getStatus().getMessage()); |
| return; |
| } |
| catch(JavaScriptModelException jme) { |
| showErrorMessage(jme.getStatus().getMessage()); |
| return; |
| } |
| } |
| |
| /** |
| * Steps into the given function in the given stack frame |
| * @param frame the frame in which the step should begin |
| * @param function the function to step into |
| * @throws DebugException |
| */ |
| private void doStepIn(IJavaScriptStackFrame frame, IFunction function) throws DebugException { |
| // ensure top stack frame |
| IStackFrame tos = frame.getThread().getTopStackFrame(); |
| if (tos == null) { |
| return; |
| } |
| if (!tos.equals(frame)) { |
| showErrorMessage(Messages.step_into_only_top_frame); |
| return; |
| } |
| StepIntoSelectionHandler handler = new StepIntoSelectionHandler((IJavaScriptThread)frame.getThread(), frame, function); |
| handler.step(); |
| } |
| |
| /** |
| * When the user chooses to "step into selection" on a line other than |
| * the currently executing one, first perform a "run to line" to get to |
| * the desired location, then perform a "step into selection." |
| */ |
| private void runToLineBeforeStepIn(ITextSelection textSelection, final IThread thread, final IFunction function) { |
| line = textSelection.getStartLine() + 1; |
| if (line == -1) { |
| return; |
| } |
| // see bug 65489 - get the run-to-line adapter from the editor |
| IRunToLineTarget runToLineAction = null; |
| IEditorPart ed = getActiveEditor(); |
| if (ed != null) { |
| runToLineAction = (IRunToLineTarget) ed.getAdapter(IRunToLineTarget.class); |
| if (runToLineAction == null) { |
| IAdapterManager adapterManager = Platform.getAdapterManager(); |
| if (adapterManager.hasAdapter(ed, IRunToLineTarget.class.getName())) { |
| runToLineAction = (IRunToLineTarget) adapterManager.loadAdapter(ed,IRunToLineTarget.class.getName()); |
| } |
| } |
| } |
| // if no adapter exists, use the Java adapter |
| if (runToLineAction == null) { |
| runToLineAction = new RunToLineAdapter(); |
| } |
| listener = new IDebugEventSetListener() { |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.debug.core.IDebugEventSetListener#handleDebugEvents(org.eclipse.debug.core.DebugEvent[]) |
| */ |
| public void handleDebugEvents(DebugEvent[] events) { |
| for (int i = 0; i < events.length; i++) { |
| DebugEvent event = events[i]; |
| switch (event.getKind()) { |
| case DebugEvent.SUSPEND : |
| handleSuspendEvent(event); |
| break; |
| case DebugEvent.TERMINATE : |
| handleTerminateEvent(event); |
| break; |
| default : |
| break; |
| } |
| } |
| } |
| /** |
| * Listen for the completion of the "run to line." When the thread |
| * suspends at the correct location, perform a "step into selection" |
| * |
| * @param event the debug event |
| */ |
| private void handleSuspendEvent(DebugEvent event) { |
| Object source = event.getSource(); |
| if (source instanceof IJavaScriptThread) { |
| try { |
| final IJavaScriptStackFrame frame= (IJavaScriptStackFrame) ((IJavaScriptThread) source).getTopStackFrame(); |
| if (isExpectedFrame(frame)) { |
| DebugPlugin plugin = DebugPlugin.getDefault(); |
| plugin.removeDebugEventListener(listener); |
| plugin.asyncExec(new Runnable() { |
| public void run() { |
| try { |
| doStepIn(frame, function); |
| } catch (DebugException e) { |
| showErrorMessage(e.getStatus().getMessage()); |
| } |
| } |
| }); |
| } |
| } catch (DebugException e) { |
| return; |
| } |
| } |
| } |
| /** |
| * Returns whether the given frame is the frame that this action is expecting. |
| * This frame is expecting a stack frame for the suspension of the "run to line". |
| * @param frame the given stack frame or <code>null</code> |
| * @return whether the given stack frame is the expected frame |
| * @throws DebugException |
| */ |
| private boolean isExpectedFrame(IJavaScriptStackFrame frame) throws DebugException { |
| return frame != null && line == frame.getLineNumber(); |
| } |
| /** |
| * When the debug target we're listening for terminates, stop listening |
| * to debug events. |
| * @param event the debug event |
| */ |
| private void handleTerminateEvent(DebugEvent event) { |
| Object source = event.getSource(); |
| if (thread.getDebugTarget() == source) { |
| DebugPlugin.getDefault().removeDebugEventListener(listener); |
| } |
| } |
| }; |
| DebugPlugin.getDefault().addDebugEventListener(listener); |
| try { |
| runToLineAction.runToLine(getActiveEditor(), textSelection, thread); |
| } catch (CoreException e) { |
| DebugPlugin.getDefault().removeDebugEventListener(listener); |
| showErrorMessage(Messages.exception_running_to_line); |
| JavaScriptDebugUIPlugin.log(e.getStatus()); |
| } |
| } |
| |
| /** |
| * Gets the current text selection from the currently active editor |
| * @return the current text selection |
| */ |
| private ITextSelection getTextSelection() { |
| IEditorPart part = getActiveEditor(); |
| if (part instanceof ITextEditor) { |
| ITextEditor editor = (ITextEditor)part; |
| if(region != null) { |
| IDocument document = editor.getDocumentProvider().getDocument(editor.getEditorInput()); |
| if(document != null) { |
| return new TextSelection(document, region.getOffset(), region.getLength()); |
| } |
| } |
| else { |
| return (ITextSelection)editor.getSelectionProvider().getSelection(); |
| } |
| } |
| showErrorMessage(Messages.only_in_the_js_editor); |
| return null; |
| } |
| |
| /** |
| * Displays an error message in the status area |
| * |
| * @param message |
| */ |
| protected void showErrorMessage(String message) { |
| if (getActiveEditor() != null) { |
| IEditorStatusLine statusLine= (IEditorStatusLine) getActiveEditor().getAdapter(IEditorStatusLine.class); |
| if (statusLine != null) { |
| statusLine.setMessage(true, message, null); |
| } |
| } |
| JavaScriptDebugUIPlugin.getStandardDisplay().beep(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.IEditorActionDelegate#setActiveEditor(org.eclipse.jface.action.IAction, org.eclipse.ui.IEditorPart) |
| */ |
| public void setActiveEditor(IAction action, IEditorPart targetEditor) { |
| editor = targetEditor; |
| } |
| |
| /** |
| * Returns the active editor or <code>null</code>. |
| * |
| * @return active editor or <code>null</code> |
| */ |
| protected IEditorPart getActiveEditor() { |
| if (window != null) { |
| // global action |
| return window.getActivePage().getActiveEditor(); |
| } |
| // pop-up action |
| return editor; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction, org.eclipse.jface.viewers.ISelection) |
| */ |
| public void selectionChanged(IAction action, ISelection selection) { |
| } |
| |
| /** |
| * Returns the current stack frame context, or <code>null</code> if none. |
| * |
| * @return the current stack frame context, or <code>null</code> if none |
| */ |
| protected IJavaScriptStackFrame getStackFrame() { |
| return EvaluationManager.getManager().getEvaluationContext(getActiveEditor()); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.IWorkbenchWindowActionDelegate#dispose() |
| */ |
| public void dispose() {} |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.IWorkbenchWindowActionDelegate#init(org.eclipse.ui.IWorkbenchWindow) |
| */ |
| public void init(IWorkbenchWindow window) { |
| this.window = window; |
| } |
| |
| } |