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eec74e5c92
Some components in the Flutter engine were derived from the forked blink codebase. While the forked components have either been removed or rewritten, the use of the blink namespace has mostly (and inconsistently) remained. This renames the blink namesapce to flutter for consistency. There are no functional changes in this patch.
96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/lib/ui/window/platform_message_response_dart.h"
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#include <utility>
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#include "flutter/common/task_runners.h"
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#include "flutter/fml/make_copyable.h"
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#include "flutter/lib/ui/window/window.h"
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#include "third_party/tonic/dart_state.h"
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#include "third_party/tonic/logging/dart_invoke.h"
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namespace flutter {
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namespace {
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// Avoid copying the contents of messages beyond a certain size.
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const int kMessageCopyThreshold = 1000;
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void MessageDataFinalizer(void* isolate_callback_data,
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Dart_WeakPersistentHandle handle,
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void* peer) {
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std::vector<uint8_t>* data = reinterpret_cast<std::vector<uint8_t>*>(peer);
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delete data;
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}
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Dart_Handle WrapByteData(std::vector<uint8_t> data) {
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if (data.size() < kMessageCopyThreshold) {
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return ToByteData(data);
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} else {
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std::vector<uint8_t>* heap_data = new std::vector<uint8_t>(std::move(data));
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return Dart_NewExternalTypedDataWithFinalizer(
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Dart_TypedData_kByteData, heap_data->data(), heap_data->size(),
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heap_data, heap_data->size(), MessageDataFinalizer);
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}
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}
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Dart_Handle WrapByteData(std::unique_ptr<fml::Mapping> mapping) {
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std::vector<uint8_t> data(mapping->GetSize());
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memcpy(data.data(), mapping->GetMapping(), mapping->GetSize());
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return WrapByteData(std::move(data));
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}
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} // anonymous namespace
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PlatformMessageResponseDart::PlatformMessageResponseDart(
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tonic::DartPersistentValue callback,
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fml::RefPtr<fml::TaskRunner> ui_task_runner)
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: callback_(std::move(callback)),
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ui_task_runner_(std::move(ui_task_runner)) {}
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PlatformMessageResponseDart::~PlatformMessageResponseDart() {
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if (!callback_.is_empty()) {
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ui_task_runner_->PostTask(fml::MakeCopyable(
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[callback = std::move(callback_)]() mutable { callback.Clear(); }));
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}
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}
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void PlatformMessageResponseDart::Complete(std::unique_ptr<fml::Mapping> data) {
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if (callback_.is_empty())
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return;
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FML_DCHECK(!is_complete_);
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is_complete_ = true;
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ui_task_runner_->PostTask(fml::MakeCopyable(
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[callback = std::move(callback_), data = std::move(data)]() mutable {
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std::shared_ptr<tonic::DartState> dart_state =
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callback.dart_state().lock();
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if (!dart_state)
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return;
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tonic::DartState::Scope scope(dart_state);
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Dart_Handle byte_buffer = WrapByteData(std::move(data));
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tonic::DartInvoke(callback.Release(), {byte_buffer});
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}));
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}
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void PlatformMessageResponseDart::CompleteEmpty() {
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if (callback_.is_empty())
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return;
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FML_DCHECK(!is_complete_);
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is_complete_ = true;
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ui_task_runner_->PostTask(
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fml::MakeCopyable([callback = std::move(callback_)]() mutable {
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std::shared_ptr<tonic::DartState> dart_state =
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callback.dart_state().lock();
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if (!dart_state)
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return;
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tonic::DartState::Scope scope(dart_state);
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tonic::DartInvoke(callback.Release(), {Dart_Null()});
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}));
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}
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} // namespace flutter
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