Devtools: parse variables scopes and sourcemap them

third_party/WebKit/Source/platform/v8_inspector/V8JavaScriptCallFrame.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/v8_inspector/V8JavaScriptCallFrame.h"
 
 #include "platform/v8_inspector/InspectorWrapper.h"
 #include "platform/v8_inspector/JavaScriptCallFrame.h"
 #include "platform/v8_inspector/V8StringUtil.h"
 #include "wtf/RefPtr.h"
@@ skipping 125 matching lines @@
 void scopeNameMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     JavaScriptCallFrame* impl = V8JavaScriptCallFrame::unwrap(info.GetIsolate()->GetCurrentContext(), info.Holder());
     v8::Maybe<int32_t> maybeScopeIndex = info[0]->Int32Value(info.GetIsolate()->GetCurrentContext());
     if (maybeScopeIndex.IsNothing())
         return;
     int scopeIndex = maybeScopeIndex.FromJust();
     info.GetReturnValue().Set(impl->scopeName(scopeIndex));
 }
 
+void scopeStartLocationMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
+{
+    JavaScriptCallFrame* impl = V8JavaScriptCallFrame::unwrap(info.GetIsolate()->GetCurrentContext(), info.Holder());
+    v8::Maybe<int32_t> maybeScopeIndex = info[0]->Int32Value(info.GetIsolate()->GetCurrentContext());
+    if (maybeScopeIndex.IsNothing())
+        return;
+    int scopeIndex = maybeScopeIndex.FromJust();
+    info.GetReturnValue().Set(impl->scopeStartLocation(scopeIndex));
+}
+
+void scopeEndLocationMethodCallback(const v8::FunctionCallbackInfo<v8::Value>& info)
+{
+    JavaScriptCallFrame* impl = V8JavaScriptCallFrame::unwrap(info.GetIsolate()->GetCurrentContext(), info.Holder());
+    v8::Maybe<int32_t> maybeScopeIndex = info[0]->Int32Value(info.GetIsolate()->GetCurrentContext());
+    if (maybeScopeIndex.IsNothing())
+        return;
+    int scopeIndex = maybeScopeIndex.FromJust();
+    info.GetReturnValue().Set(impl->scopeEndLocation(scopeIndex));
+}
+
 char hiddenPropertyName[] = "v8inspector::JavaScriptCallFrame";
 char className[] = "V8JavaScriptCallFrame";
 using JavaScriptCallFrameWrapper = InspectorWrapper<JavaScriptCallFrame, hiddenPropertyName, className>;
 
 const JavaScriptCallFrameWrapper::V8AttributeConfiguration V8JavaScriptCallFrameAttributes[] = {
     {"scopeChain", scopeChainAttributeGetterCallback},
     {"thisObject", thisObjectAttributeGetterCallback},
     {"returnValue", returnValueAttributeGetterCallback},
 
     {"caller", callerAttributeGetterCallback},
     {"sourceID", sourceIDAttributeGetterCallback},
     {"line", lineAttributeGetterCallback},
     {"column", columnAttributeGetterCallback},
     {"stepInPositions", stepInPositionsAttributeGetterCallback},
     {"functionName", functionNameAttributeGetterCallback},
     {"functionLine", functionLineAttributeGetterCallback},
     {"functionColumn", functionColumnAttributeGetterCallback},
     {"isAtReturn", isAtReturnAttributeGetterCallback},
 };
 
 const JavaScriptCallFrameWrapper::V8MethodConfiguration V8JavaScriptCallFrameMethods[] = {
     {"evaluateWithExceptionDetails", evaluateWithExceptionDetailsMethodCallback},
     {"restart", restartMethodCallback},
     {"setVariableValue", setVariableValueMethodCallback},
     {"scopeType", scopeTypeMethodCallback},
-    {"scopeName", scopeNameMethodCallback}
+    {"scopeName", scopeNameMethodCallback},
+    {"scopeStartLocation", scopeStartLocationMethodCallback},
+    {"scopeEndLocation", scopeEndLocationMethodCallback},
 };
 
 } // namespace
 
 v8::Local<v8::FunctionTemplate> V8JavaScriptCallFrame::createWrapperTemplate(v8::Isolate* isolate)
 {
     Vector<InspectorWrapperBase::V8MethodConfiguration> methods(WTF_ARRAY_LENGTH(V8JavaScriptCallFrameMethods));
     std::copy(V8JavaScriptCallFrameMethods, V8JavaScriptCallFrameMethods + WTF_ARRAY_LENGTH(V8JavaScriptCallFrameMethods), methods.begin());
     Vector<InspectorWrapperBase::V8AttributeConfiguration> attributes(WTF_ARRAY_LENGTH(V8JavaScriptCallFrameAttributes));
     std::copy(V8JavaScriptCallFrameAttributes, V8JavaScriptCallFrameAttributes + WTF_ARRAY_LENGTH(V8JavaScriptCallFrameAttributes), attributes.begin());
     return JavaScriptCallFrameWrapper::createWrapperTemplate(isolate, methods, attributes);
 }
 
 v8::Local<v8::Object> V8JavaScriptCallFrame::wrap(V8DebuggerClient* client, v8::Local<v8::FunctionTemplate> constructorTemplate, v8::Local<v8::Context> context, PassRefPtr<JavaScriptCallFrame> frame)
 {
     // Store template for .caller callback
     frame->setWrapperTemplate(constructorTemplate, context->GetIsolate());
     return JavaScriptCallFrameWrapper::wrap(client, constructorTemplate, context, frame);
 }
 
 JavaScriptCallFrame* V8JavaScriptCallFrame::unwrap(v8::Local<v8::Context> context, v8::Local<v8::Object> object)
 {
     return JavaScriptCallFrameWrapper::unwrap(context, object);
 }
 
 } // namespace blink