add jumpPreviousBreakpoint

src/code/breakpointManager.js

@@ -17,37 +17,58 @@ class breakpointManager {
     this.event = new EventManager()
     this.debugger = _debugger
     this.breakpoints = {}
-    this.isPlaying = false
     this.locationToRowConverter = _locationToRowConverter
-    this.currentLine
+    this.previousLine
   }
 
   /**
     * start looking for the next breakpoint
+    * @param {Bool} defaultToLimit - if true jump to the enf of the trace if no more breakpoint found
     *
     */
-  async jumpNextBreakpoint (defaultToEnd) {
-    this.isPlaying = true
+  async jumpNextBreakpoint (defaultToLimit) {
+    this.jump(1, defaultToLimit)
+  }
+
+  /**
+    * start looking for the previous breakpoint
+    * @param {Bool} defaultToLimit - if true jump to the enf of the trace if no more breakpoint found
+    *
+    */
+  async jumpPreviousBreakpoint (defaultToLimit) {
+    this.jump(-1, defaultToLimit)
+  }
+
+   /**
+    * start looking for the previous or next breakpoint
+    * @param {Int} direction - 1 or -1 direction of the search
+    * @param {Bool} defaultToLimit - if true jump to the enf of the trace if no more breakpoint found
+    *
+    */
+  async jump (direction, defaultToLimit) {
+    if (!this.locationToRowConverter) {
+      return
+    }
     var sourceLocation
-    for (var currentStep = this.debugger.currentStepIndex + 1; currentStep < this.debugger.traceManager.trace.length; currentStep++) {
+    var currentStep = this.debugger.currentStepIndex + direction
+    while (currentStep > 0 && currentStep < this.debugger.traceManager.trace.length) {
       try {
         sourceLocation = await this.debugger.callTree.extractSourceLocation(currentStep)
       } catch (e) {
         console.log('cannot jump to breakpoint ' + e)
       }
-      if (this.locationToRowConverter) {
       var lineColumn = this.locationToRowConverter(sourceLocation)
-        if (this.currentLine === lineColumn.start.line) {
-          if (defaultToEnd && currentStep === this.debugger.traceManager.trace.length - 1) {
-            this.debugger.stepManager.jumpTo(currentStep) // jump to the end
-          }
-          continue
+      if (this.previousLine !== lineColumn.start.line) {
+        this.previousLine = lineColumn.start.line
+        if (this.checkSourceLocation(sourceLocation.file, lineColumn.start.line)) {
+          this.debugger.stepManager.jumpTo(currentStep)
+          this.event.trigger('breakpointHit', [sourceLocation])
+          break
         }
-        this.currentLine = lineColumn.start.line
       }
-      if (this.checkSourceLocation(sourceLocation.file, this.currentLine)) {
+      currentStep += direction
+      if (defaultToLimit && (currentStep === this.debugger.traceManager.trace.length - 1 || currentStep === 0)) {
         this.debugger.stepManager.jumpTo(currentStep)
-        this.event.trigger('breakpointHit', [sourceLocation])
         break
       }
     }

src/ui/ButtonNavigator.js

@@ -12,6 +12,7 @@ function ButtonNavigator (_parent, _traceManager) {
   this.overForwardDisabled = true
   this.jumpOutDisabled = true
   this.jumpNextBreakpointDisabled = true
+  this.jumpPreviousBreakpointDisabled = true
 
   this.traceManager = _traceManager
   this.currentCall = null
@@ -69,6 +70,8 @@ ButtonNavigator.prototype.render = function () {
     </button>
     <button id='jumpout' title='jump out' class='fa fa-share' style=${ui.formatCss(style.button)} onclick=${function () { self.event.trigger('jumpOut') }} disabled=${this.jumpOutDisabled} >
     </button>
+    <button id='jumppreviousbreakpoint' title='jump to the previous breakpoint' class='fa fa-step-backward' style=${ui.formatCss(style.button)} onclick=${function () { self.event.trigger('jumpPreviousBreakpoint') }} disabled=${this.jumpPreviousBreakpointDisabled} >
+    </button>
     <button id='jumpnextbreakpoint' title='jump to the next breakpoint' class='fa fa-step-forward' style=${ui.formatCss(style.button)} onclick=${function () { self.event.trigger('jumpNextBreakpoint') }} disabled=${this.jumpNextBreakpointDisabled} >
     </button>
     <div id='reverted' style="display:none">
@@ -92,6 +95,7 @@ ButtonNavigator.prototype.reset = function () {
   this.overForwardDisabled = true
   this.jumpOutDisabled = true
   this.jumpNextBreakpointDisabled = true
+  this.jumpPreviousBreakpointDisabled = true
   resetWarning(this)
 }
 
@@ -109,6 +113,7 @@ ButtonNavigator.prototype.stepChanged = function (step) {
         console.log(error)
       } else {
         self.jumpNextBreakpointDisabled = step >= length - 1
+        self.jumpPreviousBreakpointDisabled = step <= 0
         self.intoForwardDisabled = step >= length - 1
         self.overForwardDisabled = step >= length - 1
         var stepOut = self.traceManager.findStepOut(step)
@@ -128,6 +133,7 @@ ButtonNavigator.prototype.updateAll = function () {
   this.updateDisabled('jumpout', this.jumpOutDisabled)
   this.updateDisabled('jumptoexception', this.jumpOutDisabled)
   this.updateDisabled('jumpnextbreakpoint', this.jumpNextBreakpointDisabled)
+  this.updateDisabled('jumppreviousbreakpoint', this.jumpPreviousBreakpointDisabled)
 }
 
 ButtonNavigator.prototype.updateDisabled = function (id, disabled) {

src/ui/StepManager.js

@@ -63,6 +63,9 @@ function StepManager (_parent, _traceManager) {
   this.buttonNavigator.event.register('jumpNextBreakpoint', (exceptionIndex) => {
     self.parent.breakpointManager.jumpNextBreakpoint(true)
   })
+  this.buttonNavigator.event.register('jumpPreviousBreakpoint', (exceptionIndex) => {
+    self.parent.breakpointManager.jumpPreviousBreakpoint(true)
+  })
 }
 
 StepManager.prototype.resolveToReducedTrace = function (value, incr) {