| /******************************************************************************* |
| * Copyright (c) 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.debug.ui; |
| |
| import org.eclipse.core.resources.IMarker; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.jdt.core.dom.AST; |
| import org.eclipse.jdt.core.dom.ASTParser; |
| import org.eclipse.jdt.core.dom.CompilationUnit; |
| import org.eclipse.jdt.internal.debug.ui.actions.ValidBreakpointLocationLocator; |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.Position; |
| import org.eclipse.ui.texteditor.IMarkerUpdater; |
| |
| /** |
| * This class provides a mechanism to correct the placement of a |
| * breakpoint marker when the related document is edited. |
| * |
| * This updater is used to cover the line number discrepency cases that <code>BasicMarkerUpdater</code> does not: |
| * <ul> |
| * <li>If you insert a blank line at the start of the line of code, the breakpoint |
| * is moved from the blank line to the next viable line down, |
| * following the same breakpoint placement rules as creating a breakpoint</li> |
| * |
| * <li>If you select the contents of an entire line and delete them |
| * (leaving the line blank), the breakpoint is moved to the next viable line down, |
| * following the same breakpoint placement rules as creating a breakpoint</li> |
| * |
| * <li>If the breakpoint is on the last viable line of a class file and the line is removed via either of |
| * the aforementioned deletion cases, the breakpoint is removed</li> |
| * |
| * <li>In the general deletion case if a valid breakpoint location can not be determined, it is removed</li> |
| * </ul> |
| * |
| * @since 3.3 |
| */ |
| public class BreakpointMarkerUpdater implements IMarkerUpdater { |
| |
| public BreakpointMarkerUpdater() {} |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.texteditor.IMarkerUpdater#getAttribute() |
| */ |
| public String[] getAttribute() { |
| return new String[] {IMarker.LINE_NUMBER}; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.texteditor.IMarkerUpdater#getMarkerType() |
| */ |
| public String getMarkerType() { |
| return "org.eclipse.debug.core.breakpointMarker"; //$NON-NLS-1$ |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.ui.texteditor.IMarkerUpdater#updateMarker(org.eclipse.core.resources.IMarker, org.eclipse.jface.text.IDocument, org.eclipse.jface.text.Position) |
| */ |
| public boolean updateMarker(IMarker marker, IDocument document, Position position) { |
| if(position.isDeleted()) { |
| return false; |
| } |
| ASTParser parser = ASTParser.newParser(AST.JLS3); |
| parser.setSource(document.get().toCharArray()); |
| CompilationUnit unit = (CompilationUnit) parser.createAST(null); |
| if(unit != null) { |
| try { |
| ValidBreakpointLocationLocator loc = new ValidBreakpointLocationLocator(unit, document.getLineOfOffset(position.getOffset())+1, true, true); |
| unit.accept(loc); |
| if(loc.getLocationType() == ValidBreakpointLocationLocator.LOCATION_NOT_FOUND) { |
| return false; |
| } |
| //if the line number is already good, perform no resource updating |
| if(marker.getAttribute(IMarker.LINE_NUMBER, -1) == loc.getLineLocation()) { |
| return true; |
| } |
| marker.setAttribute(IMarker.LINE_NUMBER, loc.getLineLocation()); |
| return true; |
| } |
| catch (BadLocationException e) {JDIDebugUIPlugin.log(e);} |
| catch (CoreException e) {JDIDebugUIPlugin.log(e);} |
| } |
| return false; |
| } |
| } |