electron/shell/common/native_mate_converters/blink_converter.cc
Jeremy Apthorp 2fad53e66b refactor: use v8 serialization for ipc (#20214)
* refactor: use v8 serialization for ipc

* cloning process.env doesn't work

* serialize host objects by enumerating key/values

* new serialization can handle NaN, Infinity, and undefined correctly

* can't allocate v8 objects during GC

* backport microtasks fix

* fix compile

* fix node_stream_loader reentrancy

* update subframe spec to expect undefined instead of null

* write undefined instead of crashing when serializing host objects

* fix webview spec

* fix download spec

* buffers are transformed into uint8arrays

* can't serialize promises

* fix chrome.i18n.getMessage

* fix devtools tests

* fix zoom test

* fix debug build

* fix lint

* update ipcRenderer tests

* fix printToPDF test

* update patch

* remove accidentally re-added remote-side spec

* wip

* don't attempt to serialize host objects

* jump through different hoops to set options.webContents sometimes

* whoops

* fix lint

* clean up error-handling logic

* fix memory leak

* fix lint

* convert host objects using old base::Value serialization

* fix lint more

* fall back to base::Value-based serialization

* remove commented-out code

* add docs to breaking-changes.md

* Update breaking-changes.md

* update ipcRenderer and WebContents docs

* lint

* use named values for format tag

* save a memcpy for ~30% speedup

* get rid of calls to ShallowClone

* extra debugging for paranoia

* d'oh, use the correct named tags

* apparently msstl doesn't like this DCHECK

* funny story about that DCHECK

* disable remote-related functions when enable_remote_module = false

* nits

* use EnableIf to disable remote methods in mojom

* fix include

* review comments
2019-10-09 13:59:08 -04:00

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// Copyright (c) 2015 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/common/native_mate_converters/blink_converter.h"
#include <algorithm>
#include <string>
#include <utility>
#include <vector>
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "content/public/browser/native_web_keyboard_event.h"
#include "gin/converter.h"
#include "mojo/public/cpp/base/values_mojom_traits.h"
#include "mojo/public/mojom/base/values.mojom.h"
#include "native_mate/dictionary.h"
#include "shell/common/deprecate_util.h"
#include "shell/common/keyboard_util.h"
#include "shell/common/native_mate_converters/value_converter.h"
#include "third_party/blink/public/platform/web_input_event.h"
#include "third_party/blink/public/platform/web_mouse_event.h"
#include "third_party/blink/public/platform/web_mouse_wheel_event.h"
#include "third_party/blink/public/web/web_device_emulation_params.h"
#include "ui/base/clipboard/clipboard.h"
#include "ui/events/keycodes/dom/keycode_converter.h"
#include "ui/events/keycodes/keyboard_code_conversion.h"
namespace {
template <typename T>
int VectorToBitArray(const std::vector<T>& vec) {
int bits = 0;
for (const T& item : vec)
bits |= item;
return bits;
}
} // namespace
namespace mate {
template <>
struct Converter<base::char16> {
static bool FromV8(v8::Isolate* isolate,
v8::Handle<v8::Value> val,
base::char16* out) {
base::string16 code = base::UTF8ToUTF16(gin::V8ToString(isolate, val));
if (code.length() != 1)
return false;
*out = code[0];
return true;
}
};
template <>
struct Converter<blink::WebInputEvent::Type> {
static bool FromV8(v8::Isolate* isolate,
v8::Handle<v8::Value> val,
blink::WebInputEvent::Type* out) {
std::string type = base::ToLowerASCII(gin::V8ToString(isolate, val));
if (type == "mousedown")
*out = blink::WebInputEvent::kMouseDown;
else if (type == "mouseup")
*out = blink::WebInputEvent::kMouseUp;
else if (type == "mousemove")
*out = blink::WebInputEvent::kMouseMove;
else if (type == "mouseenter")
*out = blink::WebInputEvent::kMouseEnter;
else if (type == "mouseleave")
*out = blink::WebInputEvent::kMouseLeave;
else if (type == "contextmenu")
*out = blink::WebInputEvent::kContextMenu;
else if (type == "mousewheel")
*out = blink::WebInputEvent::kMouseWheel;
else if (type == "keydown")
*out = blink::WebInputEvent::kRawKeyDown;
else if (type == "keyup")
*out = blink::WebInputEvent::kKeyUp;
else if (type == "char")
*out = blink::WebInputEvent::kChar;
else if (type == "touchstart")
*out = blink::WebInputEvent::kTouchStart;
else if (type == "touchmove")
*out = blink::WebInputEvent::kTouchMove;
else if (type == "touchend")
*out = blink::WebInputEvent::kTouchEnd;
else if (type == "touchcancel")
*out = blink::WebInputEvent::kTouchCancel;
return true;
}
};
template <>
struct Converter<blink::WebMouseEvent::Button> {
static bool FromV8(v8::Isolate* isolate,
v8::Handle<v8::Value> val,
blink::WebMouseEvent::Button* out) {
std::string button = base::ToLowerASCII(gin::V8ToString(isolate, val));
if (button == "left")
*out = blink::WebMouseEvent::Button::kLeft;
else if (button == "middle")
*out = blink::WebMouseEvent::Button::kMiddle;
else if (button == "right")
*out = blink::WebMouseEvent::Button::kRight;
else
return false;
return true;
}
};
template <>
struct Converter<blink::WebInputEvent::Modifiers> {
static bool FromV8(v8::Isolate* isolate,
v8::Handle<v8::Value> val,
blink::WebInputEvent::Modifiers* out) {
std::string modifier = base::ToLowerASCII(gin::V8ToString(isolate, val));
if (modifier == "shift")
*out = blink::WebInputEvent::kShiftKey;
else if (modifier == "control" || modifier == "ctrl")
*out = blink::WebInputEvent::kControlKey;
else if (modifier == "alt")
*out = blink::WebInputEvent::kAltKey;
else if (modifier == "meta" || modifier == "command" || modifier == "cmd")
*out = blink::WebInputEvent::kMetaKey;
else if (modifier == "iskeypad")
*out = blink::WebInputEvent::kIsKeyPad;
else if (modifier == "isautorepeat")
*out = blink::WebInputEvent::kIsAutoRepeat;
else if (modifier == "leftbuttondown")
*out = blink::WebInputEvent::kLeftButtonDown;
else if (modifier == "middlebuttondown")
*out = blink::WebInputEvent::kMiddleButtonDown;
else if (modifier == "rightbuttondown")
*out = blink::WebInputEvent::kRightButtonDown;
else if (modifier == "capslock")
*out = blink::WebInputEvent::kCapsLockOn;
else if (modifier == "numlock")
*out = blink::WebInputEvent::kNumLockOn;
else if (modifier == "left")
*out = blink::WebInputEvent::kIsLeft;
else if (modifier == "right")
*out = blink::WebInputEvent::kIsRight;
return true;
}
};
blink::WebInputEvent::Type GetWebInputEventType(v8::Isolate* isolate,
v8::Local<v8::Value> val) {
blink::WebInputEvent::Type type = blink::WebInputEvent::kUndefined;
mate::Dictionary dict;
ConvertFromV8(isolate, val, &dict) && dict.Get("type", &type);
return type;
}
bool Converter<blink::WebInputEvent>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
blink::WebInputEvent* out) {
mate::Dictionary dict;
if (!ConvertFromV8(isolate, val, &dict))
return false;
blink::WebInputEvent::Type type;
if (!dict.Get("type", &type))
return false;
out->SetType(type);
std::vector<blink::WebInputEvent::Modifiers> modifiers;
if (dict.Get("modifiers", &modifiers))
out->SetModifiers(VectorToBitArray(modifiers));
out->SetTimeStamp(base::TimeTicks::Now());
return true;
}
bool Converter<blink::WebKeyboardEvent>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
blink::WebKeyboardEvent* out) {
mate::Dictionary dict;
if (!ConvertFromV8(isolate, val, &dict))
return false;
if (!ConvertFromV8(isolate, val, static_cast<blink::WebInputEvent*>(out)))
return false;
std::string str;
if (!dict.Get("keyCode", &str))
return false;
bool shifted = false;
ui::KeyboardCode keyCode = electron::KeyboardCodeFromStr(str, &shifted);
out->windows_key_code = keyCode;
if (shifted)
out->SetModifiers(out->GetModifiers() | blink::WebInputEvent::kShiftKey);
ui::DomCode domCode = ui::UsLayoutKeyboardCodeToDomCode(keyCode);
out->dom_code = static_cast<int>(domCode);
ui::DomKey domKey;
ui::KeyboardCode dummy_code;
int flags = electron::WebEventModifiersToEventFlags(out->GetModifiers());
if (ui::DomCodeToUsLayoutDomKey(domCode, flags, &domKey, &dummy_code))
out->dom_key = static_cast<int>(domKey);
if ((out->GetType() == blink::WebInputEvent::kChar ||
out->GetType() == blink::WebInputEvent::kRawKeyDown)) {
// Make sure to not read beyond the buffer in case some bad code doesn't
// NULL-terminate it (this is called from plugins).
size_t text_length_cap = blink::WebKeyboardEvent::kTextLengthCap;
base::string16 text16 = base::UTF8ToUTF16(str);
memset(out->text, 0, text_length_cap);
memset(out->unmodified_text, 0, text_length_cap);
for (size_t i = 0; i < std::min(text_length_cap, text16.size()); ++i) {
out->text[i] = text16[i];
out->unmodified_text[i] = text16[i];
}
}
return true;
}
bool Converter<content::NativeWebKeyboardEvent>::FromV8(
v8::Isolate* isolate,
v8::Local<v8::Value> val,
content::NativeWebKeyboardEvent* out) {
mate::Dictionary dict;
if (!ConvertFromV8(isolate, val, &dict))
return false;
if (!ConvertFromV8(isolate, val, static_cast<blink::WebKeyboardEvent*>(out)))
return false;
dict.Get("skipInBrowser", &out->skip_in_browser);
return true;
}
v8::Local<v8::Value> Converter<content::NativeWebKeyboardEvent>::ToV8(
v8::Isolate* isolate,
const content::NativeWebKeyboardEvent& in) {
mate::Dictionary dict = mate::Dictionary::CreateEmpty(isolate);
if (in.GetType() == blink::WebInputEvent::Type::kRawKeyDown)
dict.Set("type", "keyDown");
else if (in.GetType() == blink::WebInputEvent::Type::kKeyUp)
dict.Set("type", "keyUp");
dict.Set("key", ui::KeycodeConverter::DomKeyToKeyString(in.dom_key));
dict.Set("code", ui::KeycodeConverter::DomCodeToCodeString(
static_cast<ui::DomCode>(in.dom_code)));
using Modifiers = blink::WebInputEvent::Modifiers;
dict.Set("isAutoRepeat", (in.GetModifiers() & Modifiers::kIsAutoRepeat) != 0);
dict.Set("shift", (in.GetModifiers() & Modifiers::kShiftKey) != 0);
dict.Set("control", (in.GetModifiers() & Modifiers::kControlKey) != 0);
dict.Set("alt", (in.GetModifiers() & Modifiers::kAltKey) != 0);
dict.Set("meta", (in.GetModifiers() & Modifiers::kMetaKey) != 0);
return dict.GetHandle();
}
bool Converter<blink::WebMouseEvent>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
blink::WebMouseEvent* out) {
mate::Dictionary dict;
if (!ConvertFromV8(isolate, val, &dict))
return false;
if (!ConvertFromV8(isolate, val, static_cast<blink::WebInputEvent*>(out)))
return false;
float x = 0.f;
float y = 0.f;
if (!dict.Get("x", &x) || !dict.Get("y", &y))
return false;
out->SetPositionInWidget(x, y);
if (!dict.Get("button", &out->button))
out->button = blink::WebMouseEvent::Button::kLeft;
float global_x = 0.f;
float global_y = 0.f;
dict.Get("globalX", &global_x);
dict.Get("globalY", &global_y);
out->SetPositionInScreen(global_x, global_y);
dict.Get("movementX", &out->movement_x);
dict.Get("movementY", &out->movement_y);
dict.Get("clickCount", &out->click_count);
return true;
}
bool Converter<blink::WebMouseWheelEvent>::FromV8(
v8::Isolate* isolate,
v8::Local<v8::Value> val,
blink::WebMouseWheelEvent* out) {
mate::Dictionary dict;
if (!ConvertFromV8(isolate, val, &dict))
return false;
if (!ConvertFromV8(isolate, val, static_cast<blink::WebMouseEvent*>(out)))
return false;
dict.Get("deltaX", &out->delta_x);
dict.Get("deltaY", &out->delta_y);
dict.Get("wheelTicksX", &out->wheel_ticks_x);
dict.Get("wheelTicksY", &out->wheel_ticks_y);
dict.Get("accelerationRatioX", &out->acceleration_ratio_x);
dict.Get("accelerationRatioY", &out->acceleration_ratio_y);
dict.Get("hasPreciseScrollingDeltas", &out->has_precise_scrolling_deltas);
#if defined(USE_AURA)
// Matches the behavior of ui/events/blink/web_input_event_traits.cc:
bool can_scroll = true;
if (dict.Get("canScroll", &can_scroll) && !can_scroll) {
out->has_precise_scrolling_deltas = false;
out->SetModifiers(out->GetModifiers() & ~blink::WebInputEvent::kControlKey);
}
#endif
return true;
}
bool Converter<blink::WebFloatPoint>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
blink::WebFloatPoint* out) {
mate::Dictionary dict;
if (!ConvertFromV8(isolate, val, &dict))
return false;
return dict.Get("x", &out->x) && dict.Get("y", &out->y);
}
template <>
struct Converter<base::Optional<blink::WebPoint>> {
static bool FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
base::Optional<blink::WebPoint>* out) {
mate::Dictionary dict;
if (!ConvertFromV8(isolate, val, &dict))
return false;
blink::WebPoint point;
bool success = dict.Get("x", &point.x) && dict.Get("y", &point.y);
if (!success)
return false;
out->emplace(point);
return true;
}
};
bool Converter<blink::WebSize>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
blink::WebSize* out) {
mate::Dictionary dict;
if (!ConvertFromV8(isolate, val, &dict))
return false;
return dict.Get("width", &out->width) && dict.Get("height", &out->height);
}
bool Converter<blink::WebDeviceEmulationParams>::FromV8(
v8::Isolate* isolate,
v8::Local<v8::Value> val,
blink::WebDeviceEmulationParams* out) {
mate::Dictionary dict;
if (!ConvertFromV8(isolate, val, &dict))
return false;
std::string screen_position;
if (dict.Get("screenPosition", &screen_position)) {
screen_position = base::ToLowerASCII(screen_position);
if (screen_position == "mobile")
out->screen_position = blink::WebDeviceEmulationParams::kMobile;
else if (screen_position == "desktop")
out->screen_position = blink::WebDeviceEmulationParams::kDesktop;
else
return false;
}
dict.Get("screenSize", &out->screen_size);
dict.Get("viewPosition", &out->view_position);
dict.Get("deviceScaleFactor", &out->device_scale_factor);
dict.Get("viewSize", &out->view_size);
dict.Get("scale", &out->scale);
return true;
}
// static
v8::Local<v8::Value> Converter<blink::WebContextMenuData::MediaType>::ToV8(
v8::Isolate* isolate,
const blink::WebContextMenuData::MediaType& in) {
switch (in) {
case blink::WebContextMenuData::kMediaTypeImage:
return mate::StringToV8(isolate, "image");
case blink::WebContextMenuData::kMediaTypeVideo:
return mate::StringToV8(isolate, "video");
case blink::WebContextMenuData::kMediaTypeAudio:
return mate::StringToV8(isolate, "audio");
case blink::WebContextMenuData::kMediaTypeCanvas:
return mate::StringToV8(isolate, "canvas");
case blink::WebContextMenuData::kMediaTypeFile:
return mate::StringToV8(isolate, "file");
case blink::WebContextMenuData::kMediaTypePlugin:
return mate::StringToV8(isolate, "plugin");
default:
return mate::StringToV8(isolate, "none");
}
}
// static
v8::Local<v8::Value> Converter<blink::WebContextMenuData::InputFieldType>::ToV8(
v8::Isolate* isolate,
const blink::WebContextMenuData::InputFieldType& in) {
switch (in) {
case blink::WebContextMenuData::kInputFieldTypePlainText:
return mate::StringToV8(isolate, "plainText");
case blink::WebContextMenuData::kInputFieldTypePassword:
return mate::StringToV8(isolate, "password");
case blink::WebContextMenuData::kInputFieldTypeOther:
return mate::StringToV8(isolate, "other");
default:
return mate::StringToV8(isolate, "none");
}
}
v8::Local<v8::Value> EditFlagsToV8(v8::Isolate* isolate, int editFlags) {
mate::Dictionary dict = mate::Dictionary::CreateEmpty(isolate);
dict.Set("canUndo", !!(editFlags & blink::WebContextMenuData::kCanUndo));
dict.Set("canRedo", !!(editFlags & blink::WebContextMenuData::kCanRedo));
dict.Set("canCut", !!(editFlags & blink::WebContextMenuData::kCanCut));
dict.Set("canCopy", !!(editFlags & blink::WebContextMenuData::kCanCopy));
bool pasteFlag = false;
if (editFlags & blink::WebContextMenuData::kCanPaste) {
std::vector<base::string16> types;
bool ignore;
ui::Clipboard::GetForCurrentThread()->ReadAvailableTypes(
ui::ClipboardBuffer::kCopyPaste, &types, &ignore);
pasteFlag = !types.empty();
}
dict.Set("canPaste", pasteFlag);
dict.Set("canDelete", !!(editFlags & blink::WebContextMenuData::kCanDelete));
dict.Set("canSelectAll",
!!(editFlags & blink::WebContextMenuData::kCanSelectAll));
return mate::ConvertToV8(isolate, dict);
}
v8::Local<v8::Value> MediaFlagsToV8(v8::Isolate* isolate, int mediaFlags) {
mate::Dictionary dict = mate::Dictionary::CreateEmpty(isolate);
dict.Set("inError",
!!(mediaFlags & blink::WebContextMenuData::kMediaInError));
dict.Set("isPaused",
!!(mediaFlags & blink::WebContextMenuData::kMediaPaused));
dict.Set("isMuted", !!(mediaFlags & blink::WebContextMenuData::kMediaMuted));
dict.Set("hasAudio",
!!(mediaFlags & blink::WebContextMenuData::kMediaHasAudio));
dict.Set("isLooping",
(mediaFlags & blink::WebContextMenuData::kMediaLoop) != 0);
dict.Set("isControlsVisible",
(mediaFlags & blink::WebContextMenuData::kMediaControls) != 0);
dict.Set("canToggleControls",
!!(mediaFlags & blink::WebContextMenuData::kMediaCanToggleControls));
dict.Set("canRotate",
!!(mediaFlags & blink::WebContextMenuData::kMediaCanRotate));
return mate::ConvertToV8(isolate, dict);
}
v8::Local<v8::Value> Converter<blink::WebCache::ResourceTypeStat>::ToV8(
v8::Isolate* isolate,
const blink::WebCache::ResourceTypeStat& stat) {
mate::Dictionary dict = mate::Dictionary::CreateEmpty(isolate);
dict.Set("count", static_cast<uint32_t>(stat.count));
dict.Set("size", static_cast<double>(stat.size));
dict.Set("liveSize", static_cast<double>(stat.decoded_size));
return dict.GetHandle();
}
v8::Local<v8::Value> Converter<blink::WebCache::ResourceTypeStats>::ToV8(
v8::Isolate* isolate,
const blink::WebCache::ResourceTypeStats& stats) {
mate::Dictionary dict = mate::Dictionary::CreateEmpty(isolate);
dict.Set("images", stats.images);
dict.Set("scripts", stats.scripts);
dict.Set("cssStyleSheets", stats.css_style_sheets);
dict.Set("xslStyleSheets", stats.xsl_style_sheets);
dict.Set("fonts", stats.fonts);
dict.Set("other", stats.other);
return dict.GetHandle();
}
// static
v8::Local<v8::Value> Converter<network::mojom::ReferrerPolicy>::ToV8(
v8::Isolate* isolate,
const network::mojom::ReferrerPolicy& in) {
switch (in) {
case network::mojom::ReferrerPolicy::kDefault:
return mate::StringToV8(isolate, "default");
case network::mojom::ReferrerPolicy::kAlways:
return mate::StringToV8(isolate, "unsafe-url");
case network::mojom::ReferrerPolicy::kNoReferrerWhenDowngrade:
return mate::StringToV8(isolate, "no-referrer-when-downgrade");
case network::mojom::ReferrerPolicy::kNever:
return mate::StringToV8(isolate, "no-referrer");
case network::mojom::ReferrerPolicy::kOrigin:
return mate::StringToV8(isolate, "origin");
case network::mojom::ReferrerPolicy::
kNoReferrerWhenDowngradeOriginWhenCrossOrigin:
return mate::StringToV8(isolate, "strict-origin-when-cross-origin");
case network::mojom::ReferrerPolicy::kSameOrigin:
return mate::StringToV8(isolate, "same-origin");
case network::mojom::ReferrerPolicy::kStrictOrigin:
return mate::StringToV8(isolate, "strict-origin");
default:
return mate::StringToV8(isolate, "no-referrer");
}
}
// static
bool Converter<network::mojom::ReferrerPolicy>::FromV8(
v8::Isolate* isolate,
v8::Handle<v8::Value> val,
network::mojom::ReferrerPolicy* out) {
std::string policy = base::ToLowerASCII(gin::V8ToString(isolate, val));
if (policy == "default")
*out = network::mojom::ReferrerPolicy::kDefault;
else if (policy == "unsafe-url")
*out = network::mojom::ReferrerPolicy::kAlways;
else if (policy == "no-referrer-when-downgrade")
*out = network::mojom::ReferrerPolicy::kNoReferrerWhenDowngrade;
else if (policy == "no-referrer")
*out = network::mojom::ReferrerPolicy::kNever;
else if (policy == "origin")
*out = network::mojom::ReferrerPolicy::kOrigin;
else if (policy == "strict-origin-when-cross-origin")
*out = network::mojom::ReferrerPolicy::
kNoReferrerWhenDowngradeOriginWhenCrossOrigin;
else if (policy == "same-origin")
*out = network::mojom::ReferrerPolicy::kSameOrigin;
else if (policy == "strict-origin")
*out = network::mojom::ReferrerPolicy::kStrictOrigin;
else
return false;
return true;
}
namespace {
constexpr uint8_t kNewSerializationTag = 0;
constexpr uint8_t kOldSerializationTag = 1;
class V8Serializer : public v8::ValueSerializer::Delegate {
public:
explicit V8Serializer(v8::Isolate* isolate,
bool use_old_serialization = false)
: isolate_(isolate),
serializer_(isolate, this),
use_old_serialization_(use_old_serialization) {}
~V8Serializer() override = default;
bool Serialize(v8::Local<v8::Value> value, blink::CloneableMessage* out) {
serializer_.WriteHeader();
if (use_old_serialization_) {
WriteTag(kOldSerializationTag);
if (!WriteBaseValue(value)) {
isolate_->ThrowException(
mate::StringToV8(isolate_, "An object could not be cloned."));
return false;
}
} else {
WriteTag(kNewSerializationTag);
bool wrote_value;
v8::TryCatch try_catch(isolate_);
if (!serializer_.WriteValue(isolate_->GetCurrentContext(), value)
.To(&wrote_value)) {
try_catch.Reset();
if (!V8Serializer(isolate_, true).Serialize(value, out)) {
try_catch.ReThrow();
return false;
}
return true;
}
DCHECK(wrote_value);
}
std::pair<uint8_t*, size_t> buffer = serializer_.Release();
DCHECK_EQ(buffer.first, data_.data());
out->encoded_message = base::make_span(buffer.first, buffer.second);
out->owned_encoded_message = std::move(data_);
return true;
}
bool WriteBaseValue(v8::Local<v8::Value> object) {
node::Environment* env = node::Environment::GetCurrent(isolate_);
if (env) {
electron::EmitDeprecationWarning(
env,
"Passing functions, DOM objects and other non-cloneable JavaScript "
"objects to IPC methods is deprecated and will throw an exception "
"beginning with Electron 9.",
"DeprecationWarning");
}
base::Value value;
if (!ConvertFromV8(isolate_, object, &value)) {
return false;
}
mojo::Message message = mojo_base::mojom::Value::SerializeAsMessage(&value);
serializer_.WriteUint32(message.data_num_bytes());
serializer_.WriteRawBytes(message.data(), message.data_num_bytes());
return true;
}
void WriteTag(uint8_t tag) { serializer_.WriteRawBytes(&tag, 1); }
// v8::ValueSerializer::Delegate
void* ReallocateBufferMemory(void* old_buffer,
size_t size,
size_t* actual_size) override {
DCHECK_EQ(old_buffer, data_.data());
data_.resize(size);
*actual_size = data_.capacity();
return data_.data();
}
void FreeBufferMemory(void* buffer) override {
DCHECK_EQ(buffer, data_.data());
data_ = {};
}
void ThrowDataCloneError(v8::Local<v8::String> message) override {
isolate_->ThrowException(v8::Exception::Error(message));
}
private:
v8::Isolate* isolate_;
std::vector<uint8_t> data_;
v8::ValueSerializer serializer_;
bool use_old_serialization_;
};
class V8Deserializer : public v8::ValueDeserializer::Delegate {
public:
V8Deserializer(v8::Isolate* isolate, const blink::CloneableMessage& message)
: isolate_(isolate),
deserializer_(isolate,
message.encoded_message.data(),
message.encoded_message.size(),
this) {}
v8::Local<v8::Value> Deserialize() {
v8::EscapableHandleScope scope(isolate_);
auto context = isolate_->GetCurrentContext();
bool read_header;
if (!deserializer_.ReadHeader(context).To(&read_header))
return v8::Null(isolate_);
DCHECK(read_header);
uint8_t tag;
if (!ReadTag(&tag))
return v8::Null(isolate_);
switch (tag) {
case kNewSerializationTag: {
v8::Local<v8::Value> value;
if (!deserializer_.ReadValue(context).ToLocal(&value)) {
return v8::Null(isolate_);
}
return scope.Escape(value);
}
case kOldSerializationTag: {
v8::Local<v8::Value> value;
if (!ReadBaseValue(&value)) {
return v8::Null(isolate_);
}
return scope.Escape(value);
}
default:
NOTREACHED() << "Invalid tag: " << tag;
return v8::Null(isolate_);
}
}
bool ReadTag(uint8_t* tag) {
const void* tag_bytes;
if (!deserializer_.ReadRawBytes(1, &tag_bytes))
return false;
*tag = *reinterpret_cast<const uint8_t*>(tag_bytes);
return true;
}
bool ReadBaseValue(v8::Local<v8::Value>* value) {
uint32_t length;
const void* data;
if (!deserializer_.ReadUint32(&length) ||
!deserializer_.ReadRawBytes(length, &data)) {
return false;
}
mojo::Message message(
base::make_span(reinterpret_cast<const uint8_t*>(data), length), {});
base::Value out;
if (!mojo_base::mojom::Value::DeserializeFromMessage(std::move(message),
&out)) {
return false;
}
*value = ConvertToV8(isolate_, out);
return true;
}
private:
v8::Isolate* isolate_;
v8::ValueDeserializer deserializer_;
};
} // namespace
v8::Local<v8::Value> Converter<blink::CloneableMessage>::ToV8(
v8::Isolate* isolate,
const blink::CloneableMessage& in) {
return V8Deserializer(isolate, in).Deserialize();
}
bool Converter<blink::CloneableMessage>::FromV8(v8::Isolate* isolate,
v8::Handle<v8::Value> val,
blink::CloneableMessage* out) {
return V8Serializer(isolate).Serialize(val, out);
}
} // namespace mate