extensions/renderer/activity_log_converter_strategy.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "extensions/renderer/activity_log_converter_strategy.h"
   6
   7 #include "base/logging.h"
   8 #include "base/values.h"
   9 #include "v8/include/v8.h"
  10
  11 namespace extensions {
  12
  13 namespace {
  14
  15 // Summarize a V8 value. This performs a shallow conversion in all cases, and
  16 // returns only a string with a description of the value (e.g.,
  17 // "[HTMLElement]").
  18 scoped_ptr<base::Value> SummarizeV8Value(v8::Isolate* isolate,
  19                                          v8::Local<v8::Object> object) {
  20   v8::TryCatch try_catch;
  21   v8::Isolate::DisallowJavascriptExecutionScope scope(
  22       isolate, v8::Isolate::DisallowJavascriptExecutionScope::THROW_ON_FAILURE);
  23   v8::Local<v8::String> name = v8::String::NewFromUtf8(isolate, "[");
  24   if (object->IsFunction()) {
  25     name =
  26         v8::String::Concat(name, v8::String::NewFromUtf8(isolate, "Function"));
  27     v8::Local<v8::Value> fname =
  28         v8::Local<v8::Function>::Cast(object)->GetName();
  29     if (fname->IsString() && v8::Local<v8::String>::Cast(fname)->Length()) {
  30       name = v8::String::Concat(name, v8::String::NewFromUtf8(isolate, " "));
  31       name = v8::String::Concat(name, v8::Local<v8::String>::Cast(fname));
  32       name = v8::String::Concat(name, v8::String::NewFromUtf8(isolate, "()"));
  33     }
  34   } else {
  35     name = v8::String::Concat(name, object->GetConstructorName());
  36   }
  37   name = v8::String::Concat(name, v8::String::NewFromUtf8(isolate, "]"));
  38
  39   if (try_catch.HasCaught()) {
  40     return scoped_ptr<base::Value>(
  41         new base::StringValue("[JS Execution Exception]"));
  42   }
  43
  44   return scoped_ptr<base::Value>(
  45       new base::StringValue(std::string(*v8::String::Utf8Value(name))));
  46 }
  47
  48 }  // namespace
  49
  50 ActivityLogConverterStrategy::ActivityLogConverterStrategy() {}
  51
  52 ActivityLogConverterStrategy::~ActivityLogConverterStrategy() {}
  53
  54 bool ActivityLogConverterStrategy::FromV8Object(
  55     v8::Local<v8::Object> value,
  56     base::Value** out,
  57     v8::Isolate* isolate,
  58     const FromV8ValueCallback& callback) const {
  59   return FromV8Internal(value, out, isolate, callback);
  60 }
  61
  62 bool ActivityLogConverterStrategy::FromV8Array(
  63     v8::Local<v8::Array> value,
  64     base::Value** out,
  65     v8::Isolate* isolate,
  66     const FromV8ValueCallback& callback) const {
  67   return FromV8Internal(value, out, isolate, callback);
  68 }
  69
  70 bool ActivityLogConverterStrategy::FromV8Internal(
  71     v8::Local<v8::Object> value,
  72     base::Value** out,
  73     v8::Isolate* isolate,
  74     const FromV8ValueCallback& callback) const {
  75   scoped_ptr<base::Value> parsed_value;
  76   parsed_value = SummarizeV8Value(isolate, value);
  77   *out = parsed_value.release();
  78
  79   return true;
  80 }
  81
  82 }  // namespace extensions