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content / common / android / gin_java_bridge_value.h [blame]
// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_COMMON_ANDROID_GIN_JAVA_BRIDGE_VALUE_H_
#define CONTENT_COMMON_ANDROID_GIN_JAVA_BRIDGE_VALUE_H_
#include <stdint.h>
#include <memory>
#include "base/pickle.h"
#include "base/values.h"
#include "content/common/content_export.h"
// In Java Bridge, we need to pass some kinds of values that can't
// be put into base::Value. And since base::Value is not extensible,
// we transfer these special values via base::Value.
namespace content {
class GinJavaBridgeValue {
public:
enum Type {
TYPE_FIRST_VALUE = 0,
// JavaScript 'undefined'
TYPE_UNDEFINED = 0,
// JavaScript NaN and Infinity
TYPE_NONFINITE,
// Bridge Object ID
TYPE_OBJECT_ID,
// Uint32 type
TYPE_UINT32,
TYPE_LAST_VALUE
};
GinJavaBridgeValue(const GinJavaBridgeValue&) = delete;
GinJavaBridgeValue& operator=(const GinJavaBridgeValue&) = delete;
// Serialization
CONTENT_EXPORT static std::unique_ptr<base::Value> CreateUndefinedValue();
CONTENT_EXPORT static std::unique_ptr<base::Value> CreateNonFiniteValue(
float in_value);
CONTENT_EXPORT static std::unique_ptr<base::Value> CreateNonFiniteValue(
double in_value);
CONTENT_EXPORT static std::unique_ptr<base::Value> CreateObjectIDValue(
int32_t in_value);
CONTENT_EXPORT static std::unique_ptr<base::Value> CreateUInt32Value(
uint32_t in_value);
// De-serialization
CONTENT_EXPORT static bool ContainsGinJavaBridgeValue(
const base::Value* value);
CONTENT_EXPORT static std::unique_ptr<const GinJavaBridgeValue> FromValue(
const base::Value* value);
CONTENT_EXPORT Type GetType() const;
CONTENT_EXPORT bool IsType(Type type) const;
CONTENT_EXPORT bool GetAsNonFinite(float* out_value) const;
CONTENT_EXPORT bool GetAsObjectID(int32_t* out_object_id) const;
CONTENT_EXPORT bool GetAsUInt32(uint32_t* out_value) const;
private:
explicit GinJavaBridgeValue(Type type);
explicit GinJavaBridgeValue(const base::Value* value);
std::unique_ptr<base::Value> SerializeToBinaryValue();
base::Pickle pickle_;
};
} // namespace content
#endif // CONTENT_COMMON_ANDROID_GIN_JAVA_BRIDGE_VALUE_H_