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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/scheduler/public/frame_status.h"
#include "third_party/blink/renderer/platform/scheduler/public/frame_scheduler.h"
#include "third_party/blink/renderer/platform/scheduler/public/page_scheduler.h"
namespace blink {
namespace scheduler {
namespace {
enum class FrameThrottlingState {
kVisible = 0,
kVisibleService = 1,
kHidden = 2,
kHiddenService = 3,
kBackground = 4,
kBackgroundExemptSelf = 5,
kBackgroundExemptOther = 6,
kCount = 7
};
enum class FrameOriginState {
kMainFrame = 0,
kSameOriginToMainFrame = 1,
kCrossOriginToMainFrame = 2,
// TODO(dcheng): get rid of kCount here.
kCount = 3
};
FrameThrottlingState GetFrameThrottlingState(
const FrameScheduler& frame_scheduler) {
if (frame_scheduler.IsPageVisible()) {
if (frame_scheduler.IsFrameVisible())
return FrameThrottlingState::kVisible;
return FrameThrottlingState::kHidden;
}
PageScheduler* page_scheduler = frame_scheduler.GetPageScheduler();
if (page_scheduler && page_scheduler->IsAudioPlaying()) {
if (frame_scheduler.IsFrameVisible())
return FrameThrottlingState::kVisibleService;
return FrameThrottlingState::kHiddenService;
}
if (frame_scheduler.IsExemptFromBudgetBasedThrottling())
return FrameThrottlingState::kBackgroundExemptSelf;
if (page_scheduler && page_scheduler->IsExemptFromBudgetBasedThrottling())
return FrameThrottlingState::kBackgroundExemptOther;
return FrameThrottlingState::kBackground;
}
FrameOriginState GetFrameOriginState(const FrameScheduler& frame_scheduler) {
if (frame_scheduler.GetFrameType() == FrameScheduler::FrameType::kMainFrame) {
return FrameOriginState::kMainFrame;
}
if (frame_scheduler.IsCrossOriginToNearestMainFrame())
return FrameOriginState::kCrossOriginToMainFrame;
return FrameOriginState::kSameOriginToMainFrame;
}
} // namespace
FrameStatus GetFrameStatus(FrameScheduler* frame_scheduler) {
if (!frame_scheduler)
return FrameStatus::kNone;
FrameThrottlingState throttling_state =
GetFrameThrottlingState(*frame_scheduler);
FrameOriginState origin_state = GetFrameOriginState(*frame_scheduler);
return static_cast<FrameStatus>(
static_cast<int>(FrameStatus::kSpecialCasesCount) +
static_cast<int>(origin_state) *
static_cast<int>(FrameThrottlingState::kCount) +
static_cast<int>(throttling_state));
}
} // namespace scheduler
} // namespace blink
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