Issue 2081: Expose function's (closure's) inner context in debugger.

src/mirror-debugger.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 895 matching lines @@
       result[i] = MakeMirror(result[i]);
     }
 
     return result;
   } else {
     return [];
   }
 };
 
 
+FunctionMirror.prototype.scopeCount = function() {
+  if (this.resolved()) {
+    return %GetFunctionScopeCount(this.value());
+  } else {
+    return 0;
+  }
+};
+
+
+FunctionMirror.prototype.scope = function(index) {
+  if (this.resolved()) {
+    return new ScopeMirror(void 0, this, index);
+  }
+};
+
+
 FunctionMirror.prototype.toText = function() {
   return this.source();
 };
 
 
 /**
  * Mirror object for unresolved functions.
  * @param {string} value The name for the unresolved function reflected by this
  *     mirror.
  * @constructor
@@ skipping 656 matching lines @@
   }
 };
 
 
 FrameMirror.prototype.scopeCount = function() {
   return this.details_.scopeCount();
 };
 
 
 FrameMirror.prototype.scope = function(index) {
-  return new ScopeMirror(this, index);
+  return new ScopeMirror(this, void 0, index);
 };
 
 
 FrameMirror.prototype.evaluate = function(source, disable_break,
                                           opt_context_object) {
   var result = %DebugEvaluate(this.break_id_,
                               this.details_.frameId(),
                               this.details_.inlinedFrameIndex(),
                               source,
                               Boolean(disable_break),
@@ skipping 142 matching lines @@
     result += '\n';
     result += this.localsText();
   }
   return result;
 };
 
 
 var kScopeDetailsTypeIndex = 0;
 var kScopeDetailsObjectIndex = 1;
 
-function ScopeDetails(frame, index) {
-  this.break_id_ = frame.break_id_;
-  this.details_ = %GetScopeDetails(frame.break_id_,
-                                   frame.details_.frameId(),
-                                   frame.details_.inlinedFrameIndex(),
-                                   index);
+function ScopeDetails(frame, fun, index) {
+  if (frame) {
+    this.break_id_ = frame.break_id_;
+    this.details_ = %GetScopeDetails(frame.break_id_,
+                                     frame.details_.frameId(),
+                                     frame.details_.inlinedFrameIndex(),
+                                     index);
+  } else {
+    this.details_ = %GetFunctionScopeDetails(fun.value(), index);
+    this.break_id_ = undefined;
+  }
 }
 
 
 ScopeDetails.prototype.type = function() {
-  %CheckExecutionState(this.break_id_);
+  if (!IS_UNDEFINED(this.break_id_)) {
+    %CheckExecutionState(this.break_id_);
+  }
   return this.details_[kScopeDetailsTypeIndex];
 };
 
 
 ScopeDetails.prototype.object = function() {
-  %CheckExecutionState(this.break_id_);
+  if (!IS_UNDEFINED(this.break_id_)) {
+    %CheckExecutionState(this.break_id_);
+  }
   return this.details_[kScopeDetailsObjectIndex];
 };
 
 
 /**
- * Mirror object for scope.
+ * Mirror object for scope of frame or function. Either frame or function must
+ * be specified.
  * @param {FrameMirror} frame The frame this scope is a part of
+ * @param {FunctionMirror} function The function this scope is a part of
  * @param {number} index The scope index in the frame
  * @constructor
  * @extends Mirror
  */
-function ScopeMirror(frame, index) {
+function ScopeMirror(frame, function, index) {
   %_CallFunction(this, SCOPE_TYPE, Mirror);
-  this.frame_index_ = frame.index_;
+  if (frame) {
+    this.frame_index_ = frame.index_;
+  } else {
+    this.frame_index_ = undefined;
+  }
   this.scope_index_ = index;
-  this.details_ = new ScopeDetails(frame, index);
+  this.details_ = new ScopeDetails(frame, function, index);
 }
 inherits(ScopeMirror, Mirror);
 
 
 ScopeMirror.prototype.frameIndex = function() {
   return this.frame_index_;
 };
 
 
 ScopeMirror.prototype.scopeIndex = function() {
@@ skipping 476 matching lines @@
     content.resolved = mirror.resolved();
     if (mirror.resolved()) {
       content.source = mirror.source();
     }
     if (mirror.script()) {
       content.script = this.serializeReference(mirror.script());
       content.scriptId = mirror.script().id();
 
       serializeLocationFields(mirror.sourceLocation(), content);
     }
+
+    content.scopes = [];
+    for (var i = 0; i < mirror.scopeCount(); i++) {
+      var scope = mirror.scope(i);
+      content.scopes.push({
+        type: scope.scopeType(),
+        index: i
+      });
+    }
   }
 
   // Add date specific properties.
   if (mirror.isDate()) {
     // Add date specific properties.
     content.value = mirror.value();
   }
 
   // Add actual properties - named properties followed by indexed properties.
   var propertyNames = mirror.propertyNames(PropertyKind.Named);
@@ skipping 156 matching lines @@
   }
   if (!NUMBER_IS_FINITE(value)) {
     if (value > 0) {
       return 'Infinity';
     } else {
       return '-Infinity';
     }
   }
   return value;
 }