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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/performance_manager/execution_context_priority/frame_audible_voter.h"
#include <utility>
#include "components/performance_manager/public/execution_context/execution_context_registry.h"
#include "components/performance_manager/public/graph/graph.h"
namespace performance_manager {
namespace execution_context_priority {
namespace {
const execution_context::ExecutionContext* GetExecutionContext(
const FrameNode* frame_node) {
return execution_context::ExecutionContextRegistry::GetFromGraph(
frame_node->GetGraph())
->GetExecutionContextForFrameNode(frame_node);
}
// Returns a vote with the appropriate priority depending on if the frame is
// audible.
Vote GetVote(bool is_audible) {
base::TaskPriority priority = is_audible ? base::TaskPriority::USER_BLOCKING
: base::TaskPriority::LOWEST;
return Vote(priority, FrameAudibleVoter::kFrameAudibleReason);
}
} // namespace
// static
const char FrameAudibleVoter::kFrameAudibleReason[] = "Frame audible.";
FrameAudibleVoter::FrameAudibleVoter() = default;
FrameAudibleVoter::~FrameAudibleVoter() = default;
void FrameAudibleVoter::InitializeOnGraph(Graph* graph,
VotingChannel voting_channel) {
voting_channel_ = std::move(voting_channel);
graph->AddFrameNodeObserver(this);
}
void FrameAudibleVoter::TearDownOnGraph(Graph* graph) {
graph->RemoveFrameNodeObserver(this);
voting_channel_.Reset();
}
void FrameAudibleVoter::OnBeforeFrameNodeAdded(
const FrameNode* frame_node,
const FrameNode* pending_parent_frame_node,
const PageNode* pending_page_node,
const ProcessNode* pending_process_node,
const FrameNode* pending_parent_or_outer_document_or_embedder) {
const Vote vote = GetVote(frame_node->IsAudible());
voting_channel_.SubmitVote(GetExecutionContext(frame_node), vote);
}
void FrameAudibleVoter::OnBeforeFrameNodeRemoved(const FrameNode* frame_node) {
voting_channel_.InvalidateVote(GetExecutionContext(frame_node));
}
void FrameAudibleVoter::OnIsAudibleChanged(const FrameNode* frame_node) {
const Vote new_vote = GetVote(frame_node->IsAudible());
voting_channel_.ChangeVote(GetExecutionContext(frame_node), new_vote);
}
} // namespace execution_context_priority
} // namespace performance_manager
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