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// Copyright 2016 The Chromium Authors. All rights reserved.
// 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/modules/sensor/sensor_proxy.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/public/platform/task_type.h"
#include "third_party/blink/public/platform/web_screen_info.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/page/chrome_client.h"
#include "third_party/blink/renderer/core/page/focus_controller.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/modules/sensor/sensor_provider_proxy.h"
#include "third_party/blink/renderer/modules/sensor/sensor_reading_remapper.h"
#include "third_party/blink/renderer/platform/web_test_support.h"
#include "third_party/blink/renderer/platform/weborigin/security_origin.h"
namespace blink {
const char SensorProxy::kDefaultErrorDescription[] =
"Could not connect to a sensor";
SensorProxy::SensorProxy(device::mojom::blink::SensorType sensor_type,
SensorProviderProxy* provider,
Page* page)
: PageVisibilityObserver(page),
FocusChangedObserver(page),
type_(sensor_type),
state_(SensorProxy::kUninitialized),
provider_(provider) {}
SensorProxy::~SensorProxy() {}
void SensorProxy::Trace(Visitor* visitor) {
visitor->Trace(observers_);
visitor->Trace(provider_);
PageVisibilityObserver::Trace(visitor);
FocusChangedObserver::Trace(visitor);
}
void SensorProxy::AddObserver(Observer* observer) {
if (!observers_.Contains(observer))
observers_.insert(observer);
}
void SensorProxy::RemoveObserver(Observer* observer) {
observers_.erase(observer);
}
void SensorProxy::Detach() {
if (!detached_) {
provider_->RemoveSensorProxy(this);
detached_ = true;
}
}
void SensorProxy::ReportError(DOMExceptionCode code, const String& message) {
auto copy = observers_;
for (Observer* observer : copy) {
observer->OnSensorError(code, message, String());
}
}
namespace {
uint16_t GetScreenOrientationAngle(LocalFrame& frame) {
if (WebTestSupport::IsRunningWebTest()) {
// Simulate that the device is turned 90 degrees on the right.
// 'orientation_angle' must be 270 as per
// https://w3c.github.io/screen-orientation/#dfn-update-the-orientation-information.
return 270;
}
return frame.GetChromeClient().GetScreenInfo(frame).orientation_angle;
}
} // namespace
const device::SensorReading& SensorProxy::GetReading(bool remapped) const {
DCHECK(IsInitialized());
if (remapped) {
if (remapped_reading_.timestamp() != reading_.timestamp()) {
remapped_reading_ = reading_;
SensorReadingRemapper::RemapToScreenCoords(
type_,
GetScreenOrientationAngle(
*provider_->GetSupplementable()->GetFrame()),
&remapped_reading_);
}
return remapped_reading_;
}
return reading_;
}
void SensorProxy::PageVisibilityChanged() {
UpdateSuspendedStatus();
}
void SensorProxy::FocusedFrameChanged() {
UpdateSuspendedStatus();
}
void SensorProxy::UpdateSuspendedStatus() {
if (!IsInitialized())
return;
if (ShouldSuspendUpdates())
Suspend();
else
Resume();
}
bool SensorProxy::ShouldSuspendUpdates() const {
if (!GetPage()->IsPageVisible())
return true;
LocalFrame* focused_frame = GetPage()->GetFocusController().FocusedFrame();
LocalFrame* this_frame = provider_->GetSupplementable()->GetFrame();
if (!focused_frame || !this_frame)
return true;
if (focused_frame == this_frame)
return false;
const SecurityOrigin* focused_frame_origin =
focused_frame->GetSecurityContext()->GetSecurityOrigin();
const SecurityOrigin* this_origin =
this_frame->GetSecurityContext()->GetSecurityOrigin();
return !focused_frame_origin->CanAccess(this_origin);
}
device::mojom::blink::SensorProvider* SensorProxy::sensor_provider() const {
return provider_->sensor_provider();
}
} // namespace blink
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