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chore: modernize Value usage in converters (#34794)

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* chore: modernize Value usage in converters

* Date is parsed as an empty object now
This commit is contained in:
Jeremy Rose 2022-07-05 08:25:18 -07:00 • committed by GitHub
parent d28ed0da20
commit 0ee7f14190
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GPG key ID: 4AEE18F83AFDEB23
34 changed files with 203 additions and 829 deletions
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21
shell/common/api/electron_api_native_image.cc
View file

@ -329,24 +329,24 @@ float NativeImage::GetAspectRatio(const absl::optional<float> scale_factor) {
}
gin::Handle<NativeImage> NativeImage::Resize(gin::Arguments* args,
base::DictionaryValue options) {
base::Value::Dict options) {
float scale_factor = GetScaleFactorFromOptions(args);
gfx::Size size = GetSize(scale_factor);
int width = size.width();
int height = size.height();
bool width_set = options.GetInteger("width", &width);
bool height_set = options.GetInteger("height", &height);
absl::optional<int> new_width = options.FindInt("width");
absl::optional<int> new_height = options.FindInt("height");
int width = new_width.value_or(size.width());
int height = new_height.value_or(size.height());
size.SetSize(width, height);
if (width <= 0 && height <= 0) {
return CreateEmpty(args->isolate());
} else if (width_set && !height_set) {
} else if (new_width && !new_height) {
// Scale height to preserve original aspect ratio
size.set_height(width);
size =
gfx::ScaleToRoundedSize(size, 1.f, 1.f / GetAspectRatio(scale_factor));
} else if (height_set && !width_set) {
} else if (new_height && !new_width) {
// Scale width to preserve original aspect ratio
size.set_width(height);
size = gfx::ScaleToRoundedSize(size, GetAspectRatio(scale_factor), 1.f);
@ -354,11 +354,10 @@ gin::Handle<NativeImage> NativeImage::Resize(gin::Arguments* args,
skia::ImageOperations::ResizeMethod method =
skia::ImageOperations::ResizeMethod::RESIZE_BEST;
std::string quality;
options.GetString("quality", &quality);
if (quality == "good")
std::string* quality = options.FindString("quality");
if (quality && *quality == "good")
method = skia::ImageOperations::ResizeMethod::RESIZE_GOOD;
else if (quality == "better")
else if (quality && *quality == "better")
method = skia::ImageOperations::ResizeMethod::RESIZE_BETTER;
gfx::ImageSkia resized = gfx::ImageSkiaOperations::CreateResizedImage(

2
shell/common/api/electron_api_native_image.h
View file

@ -112,7 +112,7 @@ class NativeImage : public gin::Wrappable<NativeImage> {
v8::Local<v8::Value> GetBitmap(gin::Arguments* args);
v8::Local<v8::Value> GetNativeHandle(gin_helper::ErrorThrower thrower);
gin::Handle<NativeImage> Resize(gin::Arguments* args,
base::DictionaryValue options);
base::Value::Dict options);
gin::Handle<NativeImage> Crop(v8::Isolate* isolate, const gfx::Rect& rect);
std::string ToDataURL(gin::Arguments* args);
bool IsEmpty();

3
shell/common/gin_converters/extension_converter.cc
View file

@ -22,7 +22,8 @@ v8::Local<v8::Value> Converter<const extensions::Extension*>::ToV8(
dict.Set("path", extension->path());
dict.Set("url", extension->url());
dict.Set("version", extension->VersionString());
dict.Set("manifest", *(extension->manifest()->value()));
dict.Set("manifest",
*static_cast<const base::Value*>(extension->manifest()->value()));
return gin::ConvertToV8(isolate, dict);
}

10
shell/common/gin_converters/net_converter.cc
View file

@ -234,13 +234,13 @@ v8::Local<v8::Value> Converter<net::HttpRequestHeaders>::ToV8(
bool Converter<net::HttpRequestHeaders>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
net::HttpRequestHeaders* out) {
base::DictionaryValue dict;
base::Value::Dict dict;
if (!ConvertFromV8(isolate, val, &dict))
return false;
for (base::DictionaryValue::Iterator it(dict); !it.IsAtEnd(); it.Advance()) {
if (it.value().is_string()) {
std::string value = it.value().GetString();
out->SetHeader(it.key(), value);
for (const auto it : dict) {
if (it.second.is_string()) {
std::string value = it.second.GetString();
out->SetHeader(it.first, value);
}
}
return true;

59
shell/common/gin_converters/value_converter.cc
View file

@ -7,38 +7,38 @@
#include <memory>
#include <utility>
#include "base/values.h"
#include "shell/common/v8_value_converter.h"
#include "content/public/renderer/v8_value_converter.h"
namespace gin {
bool Converter<base::DictionaryValue>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
base::DictionaryValue* out) {
electron::V8ValueConverter converter;
std::unique_ptr<base::Value> value(
converter.FromV8Value(val, isolate->GetCurrentContext()));
bool Converter<base::Value::Dict>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
base::Value::Dict* out) {
std::unique_ptr<base::Value> value =
content::V8ValueConverter::Create()->FromV8Value(
val, isolate->GetCurrentContext());
if (value && value->is_dict()) {
out->Swap(static_cast<base::DictionaryValue*>(value.get()));
*out = std::move(value->GetDict());
return true;
} else {
return false;
}
}
v8::Local<v8::Value> Converter<base::DictionaryValue>::ToV8(
v8::Local<v8::Value> Converter<base::Value::Dict>::ToV8(
v8::Isolate* isolate,
const base::DictionaryValue& val) {
electron::V8ValueConverter converter;
return converter.ToV8Value(&val, isolate->GetCurrentContext());
const base::Value::Dict& val) {
base::Value value(val.Clone());
return content::V8ValueConverter::Create()->ToV8Value(
&value, isolate->GetCurrentContext());
}
bool Converter<base::Value>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
base::Value* out) {
electron::V8ValueConverter converter;
std::unique_ptr<base::Value> value(
converter.FromV8Value(val, isolate->GetCurrentContext()));
std::unique_ptr<base::Value> value =
content::V8ValueConverter::Create()->FromV8Value(
val, isolate->GetCurrentContext());
if (value) {
*out = std::move(*value);
return true;
@ -49,29 +49,30 @@ bool Converter<base::Value>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> Converter<base::Value>::ToV8(v8::Isolate* isolate,
const base::Value& val) {
electron::V8ValueConverter converter;
return converter.ToV8Value(&val, isolate->GetCurrentContext());
return content::V8ValueConverter::Create()->ToV8Value(
&val, isolate->GetCurrentContext());
}
bool Converter<base::ListValue>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
base::ListValue* out) {
electron::V8ValueConverter converter;
std::unique_ptr<base::Value> value(
converter.FromV8Value(val, isolate->GetCurrentContext()));
bool Converter<base::Value::List>::FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
base::Value::List* out) {
std::unique_ptr<base::Value> value =
content::V8ValueConverter::Create()->FromV8Value(
val, isolate->GetCurrentContext());
if (value && value->is_list()) {
out->Swap(static_cast<base::ListValue*>(value.get()));
*out = std::move(value->GetList());
return true;
} else {
return false;
}
}
v8::Local<v8::Value> Converter<base::ListValue>::ToV8(
v8::Local<v8::Value> Converter<base::Value::List>::ToV8(
v8::Isolate* isolate,
const base::ListValue& val) {
electron::V8ValueConverter converter;
return converter.ToV8Value(&val, isolate->GetCurrentContext());
const base::Value::List& val) {
base::Value value(val.Clone());
return content::V8ValueConverter::Create()->ToV8Value(
&value, isolate->GetCurrentContext());
}
} // namespace gin

19
shell/common/gin_converters/value_converter.h
View file

@ -5,23 +5,18 @@
#ifndef ELECTRON_SHELL_COMMON_GIN_CONVERTERS_VALUE_CONVERTER_H_
#define ELECTRON_SHELL_COMMON_GIN_CONVERTERS_VALUE_CONVERTER_H_
#include "base/values.h"
#include "gin/converter.h"
namespace base {
class DictionaryValue;
class ListValue;
class Value;
} // namespace base
namespace gin {
template <>
struct Converter<base::DictionaryValue> {
struct Converter<base::Value::Dict> {
static bool FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
base::DictionaryValue* out);
base::Value::Dict* out);
static v8::Local<v8::Value> ToV8(v8::Isolate* isolate,
const base::DictionaryValue& val);
const base::Value::Dict& val);
};
template <>
@ -34,12 +29,12 @@ struct Converter<base::Value> {
};
template <>
struct Converter<base::ListValue> {
struct Converter<base::Value::List> {
static bool FromV8(v8::Isolate* isolate,
v8::Local<v8::Value> val,
base::ListValue* out);
base::Value::List* out);
static v8::Local<v8::Value> ToV8(v8::Isolate* isolate,
const base::ListValue& val);
const base::Value::List& val);
};
} // namespace gin

524
shell/common/v8_value_converter.cc
View file

@ -1,524 +0,0 @@
// Copyright (c) 2013 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/common/v8_value_converter.h"
#include <iterator>
#include <map>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/logging.h"
#include "base/values.h"
#include "shell/common/gin_helper/dictionary.h"
#include "shell/common/node_bindings.h"
#include "shell/common/node_includes.h"
namespace electron {
namespace {
const int kMaxRecursionDepth = 100;
} // namespace
// The state of a call to FromV8Value.
class V8ValueConverter::FromV8ValueState {
public:
// Level scope which updates the current depth of some FromV8ValueState.
class Level {
public:
explicit Level(FromV8ValueState* state) : state_(state) {
state_->max_recursion_depth_--;
}
~Level() { state_->max_recursion_depth_++; }
private:
FromV8ValueState* state_;
};
FromV8ValueState() : max_recursion_depth_(kMaxRecursionDepth) {}
// If |handle| is not in |unique_map_|, then add it to |unique_map_| and
// return true.
//
// Otherwise do nothing and return false. Here "A is unique" means that no
// other handle B in the map points to the same object as A. Note that A can
// be unique even if there already is another handle with the same identity
// hash (key) in the map, because two objects can have the same hash.
bool AddToUniquenessCheck(v8::Local<v8::Object> handle) {
int hash;
auto iter = GetIteratorInMap(handle, &hash);
if (iter != unique_map_.end())
return false;
unique_map_.insert(std::make_pair(hash, handle));
return true;
}
bool RemoveFromUniquenessCheck(v8::Local<v8::Object> handle) {
int unused_hash;
auto iter = GetIteratorInMap(handle, &unused_hash);
if (iter == unique_map_.end())
return false;
unique_map_.erase(iter);
return true;
}
bool HasReachedMaxRecursionDepth() { return max_recursion_depth_ < 0; }
private:
using HashToHandleMap = std::multimap<int, v8::Local<v8::Object>>;
using Iterator = HashToHandleMap::const_iterator;
Iterator GetIteratorInMap(v8::Local<v8::Object> handle, int* hash) {
*hash = handle->GetIdentityHash();
// We only compare using == with handles to objects with the same identity
// hash. Different hash obviously means different objects, but two objects
// in a couple of thousands could have the same identity hash.
std::pair<Iterator, Iterator> range = unique_map_.equal_range(*hash);
for (auto it = range.first; it != range.second; ++it) {
// Operator == for handles actually compares the underlying objects.
if (it->second == handle)
return it;
}
// Not found.
return unique_map_.end();
}
HashToHandleMap unique_map_;
int max_recursion_depth_;
};
// A class to ensure that objects/arrays that are being converted by
// this V8ValueConverterImpl do not have cycles.
//
// An example of cycle: var v = {}; v = {key: v};
// Not an example of cycle: var v = {}; a = [v, v]; or w = {a: v, b: v};
class V8ValueConverter::ScopedUniquenessGuard {
public:
ScopedUniquenessGuard(V8ValueConverter::FromV8ValueState* state,
v8::Local<v8::Object> value)
: state_(state),
value_(value),
is_valid_(state_->AddToUniquenessCheck(value_)) {}
~ScopedUniquenessGuard() {
if (is_valid_) {
bool removed = state_->RemoveFromUniquenessCheck(value_);
DCHECK(removed);
}
}
// disable copy
ScopedUniquenessGuard(const ScopedUniquenessGuard&) = delete;
ScopedUniquenessGuard& operator=(const ScopedUniquenessGuard&) = delete;
bool is_valid() const { return is_valid_; }
private:
typedef std::multimap<int, v8::Local<v8::Object>> HashToHandleMap;
V8ValueConverter::FromV8ValueState* state_;
v8::Local<v8::Object> value_;
bool is_valid_;
};
V8ValueConverter::V8ValueConverter() = default;
void V8ValueConverter::SetRegExpAllowed(bool val) {
reg_exp_allowed_ = val;
}
void V8ValueConverter::SetFunctionAllowed(bool val) {
function_allowed_ = val;
}
void V8ValueConverter::SetStripNullFromObjects(bool val) {
strip_null_from_objects_ = val;
}
v8::Local<v8::Value> V8ValueConverter::ToV8Value(
const base::Value* value,
v8::Local<v8::Context> context) const {
v8::Context::Scope context_scope(context);
v8::EscapableHandleScope handle_scope(context->GetIsolate());
return handle_scope.Escape(ToV8ValueImpl(context->GetIsolate(), value));
}
std::unique_ptr<base::Value> V8ValueConverter::FromV8Value(
v8::Local<v8::Value> val,
v8::Local<v8::Context> context) const {
v8::Context::Scope context_scope(context);
v8::HandleScope handle_scope(context->GetIsolate());
FromV8ValueState state;
return FromV8ValueImpl(&state, val, context->GetIsolate());
}
v8::Local<v8::Value> V8ValueConverter::ToV8ValueImpl(
v8::Isolate* isolate,
const base::Value* value) const {
switch (value->type()) {
case base::Value::Type::NONE:
return v8::Null(isolate);
case base::Value::Type::BOOLEAN: {
bool val = value->GetBool();
return v8::Boolean::New(isolate, val);
}
case base::Value::Type::INTEGER: {
int val = value->GetInt();
return v8::Integer::New(isolate, val);
}
case base::Value::Type::DOUBLE: {
double val = value->GetDouble();
return v8::Number::New(isolate, val);
}
case base::Value::Type::STRING: {
std::string val = value->GetString();
return v8::String::NewFromUtf8(isolate, val.c_str(),
v8::NewStringType::kNormal, val.length())
.ToLocalChecked();
}
case base::Value::Type::LIST:
return ToV8Array(isolate, static_cast<const base::ListValue*>(value));
case base::Value::Type::DICTIONARY:
return ToV8Object(isolate,
static_cast<const base::DictionaryValue*>(value));
case base::Value::Type::BINARY:
return ToArrayBuffer(isolate, static_cast<const base::Value*>(value));
default:
LOG(ERROR) << "Unexpected value type: " << value->type();
return v8::Null(isolate);
}
}
v8::Local<v8::Value> V8ValueConverter::ToV8Array(
v8::Isolate* isolate,
const base::ListValue* val) const {
v8::Local<v8::Array> result(
v8::Array::New(isolate, val->GetListDeprecated().size()));
auto context = isolate->GetCurrentContext();
for (size_t i = 0; i < val->GetListDeprecated().size(); ++i) {
const base::Value& child = val->GetListDeprecated()[i];
v8::Local<v8::Value> child_v8 = ToV8ValueImpl(isolate, &child);
v8::TryCatch try_catch(isolate);
result->Set(context, static_cast<uint32_t>(i), child_v8).Check();
if (try_catch.HasCaught())
LOG(ERROR) << "Setter for index " << i << " threw an exception.";
}
return result;
}
v8::Local<v8::Value> V8ValueConverter::ToV8Object(
v8::Isolate* isolate,
const base::DictionaryValue* val) const {
gin_helper::Dictionary result = gin::Dictionary::CreateEmpty(isolate);
result.SetHidden("simple", true);
for (base::DictionaryValue::Iterator iter(*val); !iter.IsAtEnd();
iter.Advance()) {
const std::string& key = iter.key();
v8::Local<v8::Value> child_v8 = ToV8ValueImpl(isolate, &iter.value());
v8::TryCatch try_catch(isolate);
result.Set(key, child_v8);
if (try_catch.HasCaught()) {
LOG(ERROR) << "Setter for property " << key.c_str() << " threw an "
<< "exception.";
}
}
return result.GetHandle();
}
v8::Local<v8::Value> V8ValueConverter::ToArrayBuffer(
v8::Isolate* isolate,
const base::Value* value) const {
const auto* data = reinterpret_cast<const char*>(value->GetBlob().data());
size_t length = value->GetBlob().size();
if (NodeBindings::IsInitialized()) {
return node::Buffer::Copy(isolate, data, length).ToLocalChecked();
}
if (length > node::Buffer::kMaxLength) {
return v8::Local<v8::Object>();
}
auto context = isolate->GetCurrentContext();
auto array_buffer = v8::ArrayBuffer::New(isolate, length);
std::shared_ptr<v8::BackingStore> backing_store =
array_buffer->GetBackingStore();
memcpy(backing_store->Data(), data, length);
// From this point, if something goes wrong(can't find Buffer class for
// example) we'll simply return a Uint8Array based on the created ArrayBuffer.
// This can happen if no preload script was specified to the renderer.
gin_helper::Dictionary global(isolate, context->Global());
v8::Local<v8::Value> buffer_value;
// Get the Buffer class stored as a hidden value in the global object. We'll
// use it return a browserified Buffer.
if (!global.GetHidden("Buffer", &buffer_value) ||
!buffer_value->IsFunction()) {
return v8::Uint8Array::New(array_buffer, 0, length);
}
gin::Dictionary buffer_class(
isolate,
buffer_value->ToObject(isolate->GetCurrentContext()).ToLocalChecked());
v8::Local<v8::Value> from_value;
if (!buffer_class.Get("from", &from_value) || !from_value->IsFunction()) {
return v8::Uint8Array::New(array_buffer, 0, length);
}
v8::Local<v8::Value> args[] = {array_buffer};
auto func = from_value.As<v8::Function>();
auto result = func->Call(context, v8::Null(isolate), std::size(args), args);
if (!result.IsEmpty()) {
return result.ToLocalChecked();
}
return v8::Uint8Array::New(array_buffer, 0, length);
}
std::unique_ptr<base::Value> V8ValueConverter::FromV8ValueImpl(
FromV8ValueState* state,
v8::Local<v8::Value> val,
v8::Isolate* isolate) const {
FromV8ValueState::Level state_level(state);
if (state->HasReachedMaxRecursionDepth())
return nullptr;
if (val->IsExternal())
return std::make_unique<base::Value>();
if (val->IsNull())
return std::make_unique<base::Value>();
auto context = isolate->GetCurrentContext();
if (val->IsBoolean())
return std::make_unique<base::Value>(val->ToBoolean(isolate)->Value());
if (val->IsInt32())
return std::make_unique<base::Value>(val.As<v8::Int32>()->Value());
if (val->IsNumber()) {
double val_as_double = val.As<v8::Number>()->Value();
if (!std::isfinite(val_as_double))
return nullptr;
return std::make_unique<base::Value>(val_as_double);
}
if (val->IsString()) {
v8::String::Utf8Value utf8(isolate, val);
return std::make_unique<base::Value>(std::string(*utf8, utf8.length()));
}
if (val->IsUndefined())
// JSON.stringify ignores undefined.
return nullptr;
if (val->IsDate()) {
v8::Date* date = v8::Date::Cast(*val);
v8::Local<v8::Value> toISOString =
date->Get(context, v8::String::NewFromUtf8(isolate, "toISOString",
v8::NewStringType::kNormal)
.ToLocalChecked())
.ToLocalChecked();
if (toISOString->IsFunction()) {
v8::MaybeLocal<v8::Value> result =
toISOString.As<v8::Function>()->Call(context, val, 0, nullptr);
if (!result.IsEmpty()) {
v8::String::Utf8Value utf8(isolate, result.ToLocalChecked());
return std::make_unique<base::Value>(std::string(*utf8, utf8.length()));
}
}
}
if (val->IsRegExp()) {
if (!reg_exp_allowed_)
// JSON.stringify converts to an object.
return FromV8Object(val.As<v8::Object>(), state, isolate);
return std::make_unique<base::Value>(*v8::String::Utf8Value(isolate, val));
}
// v8::Value doesn't have a ToArray() method for some reason.
if (val->IsArray())
return FromV8Array(val.As<v8::Array>(), state, isolate);
if (val->IsFunction()) {
if (!function_allowed_)
// JSON.stringify refuses to convert function(){}.
return nullptr;
return FromV8Object(val.As<v8::Object>(), state, isolate);
}
if (node::Buffer::HasInstance(val)) {
return FromNodeBuffer(val, state, isolate);
}
if (val->IsObject()) {
return FromV8Object(val.As<v8::Object>(), state, isolate);
}
LOG(ERROR) << "Unexpected v8 value type encountered.";
return nullptr;
}
std::unique_ptr<base::Value> V8ValueConverter::FromV8Array(
v8::Local<v8::Array> val,
FromV8ValueState* state,
v8::Isolate* isolate) const {
ScopedUniquenessGuard uniqueness_guard(state, val);
if (!uniqueness_guard.is_valid())
return std::make_unique<base::Value>();
std::unique_ptr<v8::Context::Scope> scope;
// If val was created in a different context than our current one, change to
// that context, but change back after val is converted.
if (!val->GetCreationContextChecked().IsEmpty() &&
val->GetCreationContextChecked() != isolate->GetCurrentContext())
scope =
std::make_unique<v8::Context::Scope>(val->GetCreationContextChecked());
std::unique_ptr<base::ListValue> result(new base::ListValue());
// Only fields with integer keys are carried over to the ListValue.
for (uint32_t i = 0; i < val->Length(); ++i) {
v8::TryCatch try_catch(isolate);
v8::Local<v8::Value> child_v8;
v8::MaybeLocal<v8::Value> maybe_child =
val->Get(isolate->GetCurrentContext(), i);
if (try_catch.HasCaught() || !maybe_child.ToLocal(&child_v8)) {
LOG(ERROR) << "Getter for index " << i << " threw an exception.";
child_v8 = v8::Null(isolate);
}
if (!val->HasRealIndexedProperty(isolate->GetCurrentContext(), i)
.FromMaybe(false)) {
result->Append(base::Value());
continue;
}
std::unique_ptr<base::Value> child =
FromV8ValueImpl(state, child_v8, isolate);
if (child) {
result->Append(base::Value::FromUniquePtrValue(std::move(child)));
} else {
// JSON.stringify puts null in places where values don't serialize, for
// example undefined and functions. Emulate that behavior.
result->Append(base::Value());
}
}
return std::move(result);
}
std::unique_ptr<base::Value> V8ValueConverter::FromNodeBuffer(
v8::Local<v8::Value> value,
FromV8ValueState* state,
v8::Isolate* isolate) const {
std::vector<char> buffer(
node::Buffer::Data(value),
node::Buffer::Data(value) + node::Buffer::Length(value));
return std::make_unique<base::Value>(std::move(buffer));
}
std::unique_ptr<base::Value> V8ValueConverter::FromV8Object(
v8::Local<v8::Object> val,
FromV8ValueState* state,
v8::Isolate* isolate) const {
ScopedUniquenessGuard uniqueness_guard(state, val);
if (!uniqueness_guard.is_valid())
return std::make_unique<base::Value>();
std::unique_ptr<v8::Context::Scope> scope;
// If val was created in a different context than our current one, change to
// that context, but change back after val is converted.
if (!val->GetCreationContextChecked().IsEmpty() &&
val->GetCreationContextChecked() != isolate->GetCurrentContext())
scope =
std::make_unique<v8::Context::Scope>(val->GetCreationContextChecked());
auto result = std::make_unique<base::DictionaryValue>();
v8::Local<v8::Array> property_names;
if (!val->GetOwnPropertyNames(isolate->GetCurrentContext())
.ToLocal(&property_names)) {
return std::move(result);
}
for (uint32_t i = 0; i < property_names->Length(); ++i) {
v8::Local<v8::Value> key =
property_names->Get(isolate->GetCurrentContext(), i).ToLocalChecked();
// Extend this test to cover more types as necessary and if sensible.
if (!key->IsString() && !key->IsNumber()) {
NOTREACHED() << "Key \"" << *v8::String::Utf8Value(isolate, key)
<< "\" "
"is neither a string nor a number";
continue;
}
v8::String::Utf8Value name_utf8(isolate, key);
v8::TryCatch try_catch(isolate);
v8::Local<v8::Value> child_v8;
v8::MaybeLocal<v8::Value> maybe_child =
val->Get(isolate->GetCurrentContext(), key);
if (try_catch.HasCaught() || !maybe_child.ToLocal(&child_v8)) {
LOG(ERROR) << "Getter for property " << *name_utf8
<< " threw an exception.";
child_v8 = v8::Null(isolate);
}
std::unique_ptr<base::Value> child =
FromV8ValueImpl(state, child_v8, isolate);
if (!child)
// JSON.stringify skips properties whose values don't serialize, for
// example undefined and functions. Emulate that behavior.
continue;
// Strip null if asked (and since undefined is turned into null, undefined
// too). The use case for supporting this is JSON-schema support,
// specifically for extensions, where "optional" JSON properties may be
// represented as null, yet due to buggy legacy code elsewhere isn't
// treated as such (potentially causing crashes). For example, the
// "tabs.create" function takes an object as its first argument with an
// optional "windowId" property.
//
// Given just
//
// tabs.create({})
//
// this will work as expected on code that only checks for the existence of
// a "windowId" property (such as that legacy code). However given
//
// tabs.create({windowId: null})
//
// there *is* a "windowId" property, but since it should be an int, code
// on the browser which doesn't additionally check for null will fail.
// We can avoid all bugs related to this by stripping null.
if (strip_null_from_objects_ && child->is_none())
continue;
result->SetWithoutPathExpansion(std::string(*name_utf8, name_utf8.length()),
std::move(child));
}
return std::move(result);
}
} // namespace electron

78
shell/common/v8_value_converter.h
View file

@ -1,78 +0,0 @@
// Copyright (c) 2013 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#ifndef ELECTRON_SHELL_COMMON_V8_VALUE_CONVERTER_H_
#define ELECTRON_SHELL_COMMON_V8_VALUE_CONVERTER_H_
#include <memory>
#include "base/compiler_specific.h"
#include "v8/include/v8.h"
namespace base {
class DictionaryValue;
class ListValue;
class Value;
} // namespace base
namespace electron {
class V8ValueConverter {
public:
V8ValueConverter();
// disable copy
V8ValueConverter(const V8ValueConverter&) = delete;
V8ValueConverter& operator=(const V8ValueConverter&) = delete;
void SetRegExpAllowed(bool val);
void SetFunctionAllowed(bool val);
void SetStripNullFromObjects(bool val);
v8::Local<v8::Value> ToV8Value(const base::Value* value,
v8::Local<v8::Context> context) const;
std::unique_ptr<base::Value> FromV8Value(
v8::Local<v8::Value> value,
v8::Local<v8::Context> context) const;
private:
class FromV8ValueState;
class ScopedUniquenessGuard;
v8::Local<v8::Value> ToV8ValueImpl(v8::Isolate* isolate,
const base::Value* value) const;
v8::Local<v8::Value> ToV8Array(v8::Isolate* isolate,
const base::ListValue* list) const;
v8::Local<v8::Value> ToV8Object(
v8::Isolate* isolate,
const base::DictionaryValue* dictionary) const;
v8::Local<v8::Value> ToArrayBuffer(v8::Isolate* isolate,
const base::Value* value) const;
std::unique_ptr<base::Value> FromV8ValueImpl(FromV8ValueState* state,
v8::Local<v8::Value> value,
v8::Isolate* isolate) const;
std::unique_ptr<base::Value> FromV8Array(v8::Local<v8::Array> array,
FromV8ValueState* state,
v8::Isolate* isolate) const;
std::unique_ptr<base::Value> FromNodeBuffer(v8::Local<v8::Value> value,
FromV8ValueState* state,
v8::Isolate* isolate) const;
std::unique_ptr<base::Value> FromV8Object(v8::Local<v8::Object> object,
FromV8ValueState* state,
v8::Isolate* isolate) const;
// If true, we will convert RegExp JavaScript objects to string.
bool reg_exp_allowed_ = false;
// If true, we will convert Function JavaScript objects to dictionaries.
bool function_allowed_ = false;
// If true, undefined and null values are ignored when converting v8 objects
// into Values.
bool strip_null_from_objects_ = false;
};
} // namespace electron
#endif // ELECTRON_SHELL_COMMON_V8_VALUE_CONVERTER_H_