开发一个调试JSP的Eclipse插件

 
ManageBreakpointRulerAction.update() line: 55 
ManageBreakpointRulerActionDelegate(AbstractRulerActionDelegate).update() line: 114 
ManageBreakpointRulerActionDelegate(AbstractRulerActionDelegate).mouseDown(MouseEvent) line: 139 

 
  protected void addMarker() { 
  IEditorInput editorInput= this.getTextEditor().getEditorInput(); 
   
  IDocument document= this.getDocument(); 
  //the line number of the last mouse button activity 
  int rulerLine= this.getRulerInfo().getLineOfLastMouseButtonActivity(); 
  try{ 
   int lineNum = rulerLine + 1; 
   if(lineNum > 0){ 
       //Returns a description of the specified line 
    IRegion iregion = document.getLineInformation(lineNum - 1); 
    int charStart = iregion.getOffset(); 
    int charEnd = (charStart + iregion.getLength()) - 1; 
    JSPDebugUtility.createJspLineBreakpoint(this.getResource(),  
             lineNum, charStart, charEnd); 
   } 
  }catch(CoreException coreexception){ 
   coreexception.printStackTrace(); 
  } 
  catch(BadLocationException badlocationexception){ 
   badlocationexception.printStackTrace(); 
  }   
 } 
 

 
        public class JSPBreakpoint extends JavaStratumLineBreakpoint { 
        public JSPBreakpoint(IResource resource, String stratum, String sourceName, 
                String sourcePath, String classNamePattern, int lineNumber, 
                int charStart, int charEnd, int hitCount, boolean register, 
                Map attributes) throws DebugException { 
            super(resource, stratum, sourceName, sourcePath, classNamePattern, 
                    lineNumber, charStart, charEnd, hitCount, register, attributes); 
        } 
    } 

 
    IWorkspaceRunnable wr= new IWorkspaceRunnable() { 
   public void run(IProgressMonitor monitor) throws CoreException { 
    // create the marker 
    setMarker(resource.createMarker(markerType));     
    // modify pattern 
    String pattern = classNamePattern; 
    if (pattern != null && pattern.length() == 0) { 
     pattern = null; 
    } 
    // add attributes 
    addLineBreakpointAttributes(attributes, getModelIdentifier(), true,  
          lineNumber, charStart, charEnd); 
    addStratumPatternAndHitCount(attributes, stratum, sourceName,  
sourcePath, pattern, hitCount); 
    // set attributes 
    ensureMarker().setAttributes(attributes); 
     
    register(register); 
   } 
  }; 
  run(null, wr); 
     
    protected void register(boolean register) throws CoreException { 
  if (register) { 
   DebugPlugin.getDefault().getBreakpointManager().addBreakpoint(this); 
  } else { 
   setRegistered(false); 
  } 
 } 
  

breakpointManager  = DebugPlugin.getDefault().getBreakpointManager(); 
IBreakpoint breakpoint = breakpointManager.getBreakpoint(IMarker); 
breakpointManager.removeBreakpoint(breakpoint, true); 
        

 
  public void addToTarget(JDIDebugTarget target) throws CoreException { 
  IMarker marker = this.getMarker(); 
     IResource resource = marker.getResource(); 
     String targetString = target.getLaunch().getLaunchConfiguration().getName(); 
  IJSPNameUtil util = JSPDebugUtility.getJSPNameUtil(targetString); 
      
  // pre-notification 
  fireAdding(target); 
     
  String referenceTypeName; 
  try { 
   referenceTypeName = getPattern(); 
   //如果没有设置 Pattern, 根据 Server 的类型, 产生新的 Pattern  
   if(referenceTypeName == null ||  
      "".equals(referenceTypeName.trim()) || 
      "*".equals(referenceTypeName.trim())){ 
       referenceTypeName = util.referenceTypeName(resource); 
   } 
    
  } catch (CoreException e) { 
   JDIDebugPlugin.log(e); 
   return; 
  } 
   
  this.ensureMarker().setAttribute(TYPE_NAME, referenceTypeName); 
  String sourcePath = util.sourcePath(resource); 
  this.ensureMarker().setAttribute(JSPBreakpoint.SOURCE_PATH, sourcePath); 
   
  String classPrepareTypeName= referenceTypeName; 
   
  //如果这时 class 还没有被加载, 注册一个 ClassPrepareRequest 请求 
  // 
  //当 class 加载的时候, 首先会触发 JavaBreakpoint 的 handleClassPrepareEvent 方法 
  //调用 createRequest(target, event.referenceType()) --> newRequest() --> 
  //    createLineBreakpointRequest() 创建 enable或disable 断点的请求 
  // 
  //  设置 enable/disable 动作在 configureRequest() --> updateEnabledState(request) 方法中 
  //  根据 getMarker().getAttribute(ENABLED, false) 确定断点是否有效 
   
  registerRequest(target.createClassPrepareRequest(classPrepareTypeName), target); 
   
  // create breakpoint requests for each class currently loaded 
  VirtualMachine vm = target.getVM(); 
  if (vm == null) { 
   target.requestFailed("Unable_to_add_breakpoint_-_VM_disconnected._1"),  
   null);   } 
  List classes = null; 
  try { 
   classes= vm.allClasses(); 
  } catch (RuntimeException e) { 
   target.targetRequestFailed("JavaPatternBreakpoint.0"), e);  
  } 
  if (classes != null) { 
   Iterator iter = classes.iterator(); 
   while (iter.hasNext()) { 
    ReferenceType type= (ReferenceType)iter.next(); 
    if (installableReferenceType(type, target)) { 
     createRequest(target, type); 
    } 
   } 
  } 
 }