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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/media/webrtc/delegated_source_list_capturer.h"
#include "base/logging.h"
#include "base/task/bind_post_task.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/desktop_capture.h"
// Posts a task to stop observing the `source_id` in the Native OS picker. This
// might close the picker if it is not observing any other sources.
static void StopObservingSource(content::DesktopMediaID source_id) {
content::GetIOThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&content::desktop_capture::CloseNativeScreenCapturePicker,
source_id));
}
DelegatedSourceListCapturer::DelegatedSourceListCapturer(
content::DesktopMediaID::Type type)
: type_(type) {
DETACH_FROM_SEQUENCE(sequence_checker_);
}
DelegatedSourceListCapturer::~DelegatedSourceListCapturer() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// The picker should not observe the `source_id_` if this instance is
// destructed without ever selecting a capture surface.
if (!selected_source_ && source_id_) {
StopObservingSource(content::DesktopMediaID(type_, *source_id_));
}
}
void DelegatedSourceListCapturer::Start(Callback* callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
void DelegatedSourceListCapturer::CaptureFrame() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
}
bool DelegatedSourceListCapturer::GetSourceList(SourceList* sources) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
sources->clear();
if (selected_source_) {
sources->push_back(*selected_source_);
}
return true;
}
webrtc::DelegatedSourceListController*
DelegatedSourceListCapturer::GetDelegatedSourceListController() {
// Returning this is safe also on other sequences.
DETACH_FROM_SEQUENCE(sequence_checker_);
return this;
}
void DelegatedSourceListCapturer::Observe(Observer* observer) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
CHECK(!delegated_source_list_observer_ || !observer);
delegated_source_list_observer_ = observer;
}
void DelegatedSourceListCapturer::EnsureVisible() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
auto created_callback = base::BindPostTask(
base::SequencedTaskRunner::GetCurrentDefault(),
base::BindOnce(&DelegatedSourceListCapturer::OnPickerCreated,
weak_ptr_factory_.GetWeakPtr()));
auto picker_callback = base::BindPostTask(
base::SequencedTaskRunner::GetCurrentDefault(),
base::BindOnce(&DelegatedSourceListCapturer::OnSelected,
weak_ptr_factory_.GetWeakPtr()));
auto cancel_callback = base::BindPostTask(
base::SequencedTaskRunner::GetCurrentDefault(),
base::BindOnce(&DelegatedSourceListCapturer::OnCancelled,
weak_ptr_factory_.GetWeakPtr()));
auto error_callback =
base::BindPostTask(base::SequencedTaskRunner::GetCurrentDefault(),
base::BindOnce(&DelegatedSourceListCapturer::OnError,
weak_ptr_factory_.GetWeakPtr()));
content::GetIOThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&content::desktop_capture::OpenNativeScreenCapturePicker,
type_, std::move(created_callback),
std::move(picker_callback), std::move(cancel_callback),
std::move(error_callback)));
}
void DelegatedSourceListCapturer::EnsureHidden() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// TODO(crbug.com/40286360): Implement or ensure this method is not called.
}
void DelegatedSourceListCapturer::OnPickerCreated(
content::DesktopMediaID::Id source_id) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// Only one source should be associated with the |DelegatedSourceListCapturer|
// at a time.
if (source_id_) {
StopObservingSource(content::DesktopMediaID(type_, *source_id_));
}
source_id_ = source_id;
}
void DelegatedSourceListCapturer::OnSelected(Source source) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
VLOG(1) << "DSLC::OnSelected: source_id = " << source.id;
selected_source_ = source;
if (delegated_source_list_observer_) {
delegated_source_list_observer_->OnSelection();
}
}
void DelegatedSourceListCapturer::OnCancelled() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
VLOG(1) << "DSLC::OnCancelled";
if (delegated_source_list_observer_) {
delegated_source_list_observer_->OnCancelled();
}
}
void DelegatedSourceListCapturer::OnError() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
VLOG(1) << "DSLC::OnError";
if (delegated_source_list_observer_) {
delegated_source_list_observer_->OnError();
}
}
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