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     return make_scoped_ptr(
  72         new TypedArraySerializerImpl<ElementType, ListType>(typed_array));
  73   }
  74
  75   virtual void serializeTo(char* data,
  76                    size_t data_length,
  77                    base::ListValue* out) override {
  78     DCHECK_EQ(data_length, typed_array_->Length() * sizeof(ElementType));
  79     for (ElementType *element = reinterpret_cast<ElementType*>(data),
  80                      *end = element + typed_array_->Length();
  81          element != end;
  82          ++element) {
  83       const ListType list_value = *element;
  84       out->Append(new base::FundamentalValue(list_value));
  85     }
  86   }
  87
  88  private:
  89   explicit TypedArraySerializerImpl(v8::Handle<v8::TypedArray> typed_array)
  90       : typed_array_(typed_array) {}
  91
  92   v8::Handle<v8::TypedArray> typed_array_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(TypedArraySerializerImpl);
  95 };
  96
  97 // static
  98 scoped_ptr<TypedArraySerializer> TypedArraySerializer::Create(
  99     v8::Handle<v8::TypedArray> typed_array) {
 100   if (typed_array->IsInt8Array() ||
 101       typed_array->IsUint8Array() ||
 102       typed_array->IsUint8ClampedArray()) {
 103     return TypedArraySerializerImpl<char, int>::Create(typed_array).Pass();
 104   } else if (typed_array->IsInt16Array() || typed_array->IsUint16Array()) {
 105     return TypedArraySerializerImpl<int16_t, int>::Create(typed_array).Pass();
 106   } else if (typed_array->IsInt32Array() || typed_array->IsUint32Array()) {
 107     return TypedArraySerializerImpl<int32_t, int>::Create(typed_array).Pass();
 108   } else if (typed_array->IsFloat32Array()) {
 109     return TypedArraySerializerImpl<float, double>::Create(typed_array).Pass();
 110   } else if (typed_array->IsFloat64Array()) {
 111     return TypedArraySerializerImpl<double, double>::Create(typed_array).Pass();
 112   }
 113   NOTREACHED();
 114   return scoped_ptr<TypedArraySerializer>();
 115 }
 116
 117 }  // namespace
 118
 119 bool GinJavaBridgeValueConverter::FromV8ArrayBuffer(
 120     v8::Handle<v8::Object> value,
 121     base::Value** out,
 122     v8::Isolate* isolate) const {
 123   if (!value->IsTypedArray()) {
 124     *out = GinJavaBridgeValue::CreateUndefinedValue().release();
 125     return true;
 126   }
 127
 128   char* data = NULL;
 129   size_t data_length = 0;
 130   gin::ArrayBufferView view;
 131   if (ConvertFromV8(isolate, value.As<v8::ArrayBufferView>(), &view)) {
 132     data = reinterpret_cast<char*>(view.bytes());
 133     data_length = view.num_bytes();
 134   }
 135   if (!data) {
 136     *out = GinJavaBridgeValue::CreateUndefinedValue().release();
 137     return true;
 138   }
 139
 140   base::ListValue* result = new base::ListValue();
 141   *out = result;
 142   scoped_ptr<TypedArraySerializer> serializer(
 143       TypedArraySerializer::Create(value.As<v8::TypedArray>()));
 144   serializer->serializeTo(data, data_length, result);
 145   return true;
 146 }
 147
 148 bool GinJavaBridgeValueConverter::FromV8Number(v8::Handle<v8::Number> value,
 149                                                base::Value** out) const {
 150   double double_value = value->Value();
 151   if (base::IsFinite(double_value))
 152     return false;
 153   *out = GinJavaBridgeValue::CreateNonFiniteValue(double_value).release();
 154   return true;
 155 }
 156
 157 bool GinJavaBridgeValueConverter::FromV8Undefined(base::Value** out) const {
 158   *out = GinJavaBridgeValue::CreateUndefinedValue().release();
 159   return true;
 160 }
 161
 162 }  // namespace content