content/renderer/java/gin_java_bridge_value_converter.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 "content/renderer/java/gin_java_bridge_value_converter.h"
   6
   7 #include "base/float_util.h"
   8 #include "base/values.h"
   9 #include "content/common/android/gin_java_bridge_value.h"
  10 #include "content/renderer/java/gin_java_bridge_object.h"
  11 #include "gin/array_buffer.h"
  12
  13 namespace content {
  14
  15 GinJavaBridgeValueConverter::GinJavaBridgeValueConverter()
  16     : converter_(V8ValueConverter::create()) {
  17   converter_->SetDateAllowed(false);
  18   converter_->SetRegExpAllowed(false);
  19   converter_->SetFunctionAllowed(true);
  20   converter_->SetStrategy(this);
  21 }
  22
  23 GinJavaBridgeValueConverter::~GinJavaBridgeValueConverter() {
  24 }
  25
  26 v8::Handle<v8::Value> GinJavaBridgeValueConverter::ToV8Value(
  27     const base::Value* value,
  28     v8::Handle<v8::Context> context) const {
  29   return converter_->ToV8Value(value, context);
  30 }
  31
  32 scoped_ptr<base::Value> GinJavaBridgeValueConverter::FromV8Value(
  33     v8::Handle<v8::Value> value,
  34     v8::Handle<v8::Context> context) const {
  35   return make_scoped_ptr(converter_->FromV8Value(value, context));
  36 }
  37
  38 bool GinJavaBridgeValueConverter::FromV8Object(
  39     v8::Handle<v8::Object> value,
  40     base::Value** out,
  41     v8::Isolate* isolate,
  42     const FromV8ValueCallback& callback) const {
  43   GinJavaBridgeObject* unwrapped;
  44   if (!gin::ConvertFromV8(isolate, value, &unwrapped)) {
  45     return false;
  46   }
  47   *out =
  48       GinJavaBridgeValue::CreateObjectIDValue(unwrapped->object_id()).release();
  49   return true;
  50 }
  51
  52 namespace {
  53
  54 class TypedArraySerializer {
  55  public:
  56   virtual ~TypedArraySerializer() {}
  57   static scoped_ptr<TypedArraySerializer> Create(
  58       v8::Handle<v8::TypedArray> typed_array);
  59   virtual void serializeTo(char* data,
  60                            size_t data_length,
  61                            base::ListValue* out) = 0;
  62  protected:
  63   TypedArraySerializer() {}
  64 };
  65
  66 template <typename ElementType, typename ListType>
  67 class TypedArraySerializerImpl : public TypedArraySerializer {
  68  public:
  69   static scoped_ptr<TypedArraySerializer> Create(
  70       v8::Handle<v8::TypedArray> typed_array) {
  71     scoped_ptr<TypedArraySerializerImpl<ElementType, ListType> > result(
  72         new TypedArraySerializerImpl<ElementType, ListType>(typed_array));
  73     return result.template PassAs<TypedArraySerializer>();
  74   }
  75
  76   virtual void serializeTo(char* data,
  77                    size_t data_length,
  78                    base::ListValue* out) OVERRIDE {
  79     DCHECK_EQ(data_length, typed_array_->Length() * sizeof(ElementType));
  80     for (ElementType *element = reinterpret_cast<ElementType*>(data),
  81                      *end = element + typed_array_->Length();
  82          element != end;
  83          ++element) {
  84       const ListType list_value = *element;
  85       out->Append(new base::FundamentalValue(list_value));
  86     }
  87   }
  88
  89  private:
  90   explicit TypedArraySerializerImpl(v8::Handle<v8::TypedArray> typed_array)
  91       : typed_array_(typed_array) {}
  92
  93   v8::Handle<v8::TypedArray> typed_array_;
  94
  95   DISALLOW_COPY_AND_ASSIGN(TypedArraySerializerImpl);
  96 };
  97
  98 // static
  99 scoped_ptr<TypedArraySerializer> TypedArraySerializer::Create(
 100     v8::Handle<v8::TypedArray> typed_array) {
 101   if (typed_array->IsInt8Array() ||
 102       typed_array->IsUint8Array() ||
 103       typed_array->IsUint8ClampedArray()) {
 104     return TypedArraySerializerImpl<char, int>::Create(typed_array).Pass();
 105   } else if (typed_array->IsInt16Array() || typed_array->IsUint16Array()) {
 106     return TypedArraySerializerImpl<int16_t, int>::Create(typed_array).Pass();
 107   } else if (typed_array->IsInt32Array() || typed_array->IsUint32Array()) {
 108     return TypedArraySerializerImpl<int32_t, int>::Create(typed_array).Pass();
 109   } else if (typed_array->IsFloat32Array()) {
 110     return TypedArraySerializerImpl<float, double>::Create(typed_array).Pass();
 111   } else if (typed_array->IsFloat64Array()) {
 112     return TypedArraySerializerImpl<double, double>::Create(typed_array).Pass();
 113   }
 114   NOTREACHED();
 115   return scoped_ptr<TypedArraySerializer>();
 116 }
 117
 118 }  // namespace
 119
 120 bool GinJavaBridgeValueConverter::FromV8ArrayBuffer(
 121     v8::Handle<v8::Object> value,
 122     base::Value** out,
 123     v8::Isolate* isolate) const {
 124   if (!value->IsTypedArray()) {
 125     *out = GinJavaBridgeValue::CreateUndefinedValue().release();
 126     return true;
 127   }
 128
 129   char* data = NULL;
 130   size_t data_length = 0;
 131   gin::ArrayBufferView view;
 132   if (ConvertFromV8(isolate, value.As<v8::ArrayBufferView>(), &view)) {
 133     data = reinterpret_cast<char*>(view.bytes());
 134     data_length = view.num_bytes();
 135   }
 136   if (!data) {
 137     *out = GinJavaBridgeValue::CreateUndefinedValue().release();
 138     return true;
 139   }
 140
 141   base::ListValue* result = new base::ListValue();
 142   *out = result;
 143   scoped_ptr<TypedArraySerializer> serializer(
 144       TypedArraySerializer::Create(value.As<v8::TypedArray>()));
 145   serializer->serializeTo(data, data_length, result);
 146   return true;
 147 }
 148
 149 bool GinJavaBridgeValueConverter::FromV8Number(v8::Handle<v8::Number> value,
 150                                                base::Value** out) const {
 151   double double_value = value->Value();
 152   if (base::IsFinite(double_value))
 153     return false;
 154   *out = GinJavaBridgeValue::CreateNonFiniteValue(double_value).release();
 155   return true;
 156 }
 157
 158 bool GinJavaBridgeValueConverter::FromV8Undefined(base::Value** out) const {
 159   *out = GinJavaBridgeValue::CreateUndefinedValue().release();
 160   return true;
 161 }
 162
 163 }  // namespace content