135 lines
4.2 KiB
C++
135 lines
4.2 KiB
C++
// Copyright (c) 2015 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "atom/browser/api/atom_api_power_save_blocker.h"
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#include <string>
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#include "base/task_scheduler/post_task.h"
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#include "base/threading/thread_task_runner_handle.h"
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#include "native_mate/dictionary.h"
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#include "atom/common/node_includes.h"
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namespace mate {
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template <>
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struct Converter<device::mojom::WakeLockType> {
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static bool FromV8(v8::Isolate* isolate,
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v8::Local<v8::Value> val,
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device::mojom::WakeLockType* out) {
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std::string type;
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if (!ConvertFromV8(isolate, val, &type))
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return false;
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if (type == "prevent-app-suspension")
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*out = device::mojom::WakeLockType::kPreventAppSuspension;
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else if (type == "prevent-display-sleep")
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*out = device::mojom::WakeLockType::kPreventDisplaySleep;
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else
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return false;
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return true;
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}
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};
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} // namespace mate
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namespace atom {
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namespace api {
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PowerSaveBlocker::PowerSaveBlocker(v8::Isolate* isolate)
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: current_blocker_type_(
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device::mojom::WakeLockType::kPreventAppSuspension) {
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Init(isolate);
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}
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PowerSaveBlocker::~PowerSaveBlocker() {}
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void PowerSaveBlocker::UpdatePowerSaveBlocker() {
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if (power_save_blocker_types_.empty()) {
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power_save_blocker_.reset();
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return;
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}
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// |WakeLockType::kPreventAppSuspension| keeps system active, but allows
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// screen to be turned off.
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// |WakeLockType::kPreventDisplaySleep| keeps system and screen active, has a
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// higher precedence level than |WakeLockType::kPreventAppSuspension|.
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//
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// Only the highest-precedence blocker type takes effect.
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device::mojom::WakeLockType new_blocker_type =
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device::mojom::WakeLockType::kPreventAppSuspension;
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for (const auto& element : power_save_blocker_types_) {
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if (element.second == device::mojom::WakeLockType::kPreventDisplaySleep) {
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new_blocker_type = device::mojom::WakeLockType::kPreventDisplaySleep;
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break;
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}
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}
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if (!power_save_blocker_ || new_blocker_type != current_blocker_type_) {
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auto new_blocker = std::make_unique<device::PowerSaveBlocker>(
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new_blocker_type, device::mojom::WakeLockReason::kOther,
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ATOM_PRODUCT_NAME, base::ThreadTaskRunnerHandle::Get(),
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// This task runner may be used by some device service
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// implementation bits to interface with dbus client code, which in
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// turn imposes some subtle thread affinity on the clients. We
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// therefore require a single-thread runner.
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base::CreateSingleThreadTaskRunnerWithTraits(
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{base::MayBlock(), base::TaskPriority::BACKGROUND}));
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power_save_blocker_.swap(new_blocker);
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current_blocker_type_ = new_blocker_type;
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}
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}
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int PowerSaveBlocker::Start(device::mojom::WakeLockType type) {
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static int count = 0;
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power_save_blocker_types_[count] = type;
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UpdatePowerSaveBlocker();
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return count++;
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}
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bool PowerSaveBlocker::Stop(int id) {
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bool success = power_save_blocker_types_.erase(id) > 0;
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UpdatePowerSaveBlocker();
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return success;
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}
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bool PowerSaveBlocker::IsStarted(int id) {
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return power_save_blocker_types_.find(id) != power_save_blocker_types_.end();
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}
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// static
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mate::Handle<PowerSaveBlocker> PowerSaveBlocker::Create(v8::Isolate* isolate) {
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return mate::CreateHandle(isolate, new PowerSaveBlocker(isolate));
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}
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// static
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void PowerSaveBlocker::BuildPrototype(
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v8::Isolate* isolate,
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v8::Local<v8::FunctionTemplate> prototype) {
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prototype->SetClassName(mate::StringToV8(isolate, "PowerSaveBlocker"));
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mate::ObjectTemplateBuilder(isolate, prototype->PrototypeTemplate())
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.SetMethod("start", &PowerSaveBlocker::Start)
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.SetMethod("stop", &PowerSaveBlocker::Stop)
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.SetMethod("isStarted", &PowerSaveBlocker::IsStarted);
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}
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} // namespace api
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} // namespace atom
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namespace {
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void Initialize(v8::Local<v8::Object> exports,
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v8::Local<v8::Value> unused,
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v8::Local<v8::Context> context,
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void* priv) {
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v8::Isolate* isolate = context->GetIsolate();
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mate::Dictionary dict(isolate, exports);
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dict.Set("powerSaveBlocker", atom::api::PowerSaveBlocker::Create(isolate));
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}
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} // namespace
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NODE_BUILTIN_MODULE_CONTEXT_AWARE(atom_browser_power_save_blocker, Initialize);
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