third_party/WebKit/Source/modules/device_orientation/DeviceOrientationController.cpp

// Copyright 2014 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 "modules/device_orientation/DeviceOrientationController.h"

#include "core/frame/Deprecation.h"
#include "core/frame/HostsUsingFeatures.h"
#include "core/frame/Settings.h"
#include "modules/EventModules.h"
#include "modules/device_orientation/DeviceOrientationData.h"
#include "modules/device_orientation/DeviceOrientationDispatcher.h"
#include "modules/device_orientation/DeviceOrientationEvent.h"
#include "platform/weborigin/SecurityOrigin.h"
#include "platform/wtf/Assertions.h"
#include "public/platform/Platform.h"

namespace blink {

DeviceOrientationController::DeviceOrientationController(Document& document)
    : DeviceSingleWindowEventController(document),
      Supplement<Document>(document) {}

DeviceOrientationController::~DeviceOrientationController() {}

void DeviceOrientationController::DidUpdateData() {
  if (override_orientation_data_)
    return;
  DispatchDeviceEvent(LastEvent());
}

const char* DeviceOrientationController::SupplementName() {
  return "DeviceOrientationController";
}

DeviceOrientationController& DeviceOrientationController::From(
    Document& document) {
  DeviceOrientationController* controller =
      static_cast<DeviceOrientationController*>(
          Supplement<Document>::From(document, SupplementName()));
  if (!controller) {
    controller = new DeviceOrientationController(document);
    Supplement<Document>::ProvideTo(document, SupplementName(), controller);
  }
  return *controller;
}

void DeviceOrientationController::DidAddEventListener(
    LocalDOMWindow* window,
    const AtomicString& event_type) {
  if (event_type != EventTypeName())
    return;

  if (GetDocument().GetFrame()) {
    if (GetDocument().IsSecureContext()) {
      UseCounter::Count(GetDocument().GetFrame(),
                        WebFeature::kDeviceOrientationSecureOrigin);
    } else {
      Deprecation::CountDeprecation(
          GetDocument().GetFrame(),
          WebFeature::kDeviceOrientationInsecureOrigin);
      HostsUsingFeatures::CountAnyWorld(
          GetDocument(),
          HostsUsingFeatures::Feature::kDeviceOrientationInsecureHost);
      if (GetDocument()
              .GetFrame()
              ->GetSettings()
              ->GetStrictPowerfulFeatureRestrictions())
        return;
    }
  }

  if (!has_event_listener_) {
    Platform::Current()->RecordRapporURL("DeviceSensors.DeviceOrientation",
                                         WebURL(GetDocument().Url()));

    if (!IsSameSecurityOriginAsMainFrame()) {
      Platform::Current()->RecordRapporURL(
          "DeviceSensors.DeviceOrientationCrossOrigin",
          WebURL(GetDocument().Url()));
    }
  }

  DeviceSingleWindowEventController::DidAddEventListener(window, event_type);
}

DeviceOrientationData* DeviceOrientationController::LastData() const {
  return override_orientation_data_
             ? override_orientation_data_.Get()
             : DispatcherInstance().LatestDeviceOrientationData();
}

bool DeviceOrientationController::HasLastData() {
  return LastData();
}

void DeviceOrientationController::RegisterWithDispatcher() {
  DispatcherInstance().AddController(this);
}

void DeviceOrientationController::UnregisterWithDispatcher() {
  DispatcherInstance().RemoveController(this);
}

Event* DeviceOrientationController::LastEvent() const {
  return DeviceOrientationEvent::Create(EventTypeName(), LastData());
}

bool DeviceOrientationController::IsNullEvent(Event* event) const {
  DeviceOrientationEvent* orientation_event = ToDeviceOrientationEvent(event);
  return !orientation_event->Orientation()->CanProvideEventData();
}

const AtomicString& DeviceOrientationController::EventTypeName() const {
  return EventTypeNames::deviceorientation;
}

void DeviceOrientationController::SetOverride(
    DeviceOrientationData* device_orientation_data) {
  DCHECK(device_orientation_data);
  override_orientation_data_ = device_orientation_data;
  DispatchDeviceEvent(LastEvent());
}

void DeviceOrientationController::ClearOverride() {
  if (!override_orientation_data_)
    return;
  override_orientation_data_.Clear();
  if (LastData())
    DidUpdateData();
}

DeviceOrientationDispatcher& DeviceOrientationController::DispatcherInstance()
    const {
  return DeviceOrientationDispatcher::Instance(false);
}

void DeviceOrientationController::Trace(blink::Visitor* visitor) {
  visitor->Trace(override_orientation_data_);
  DeviceSingleWindowEventController::Trace(visitor);
  Supplement<Document>::Trace(visitor);
}

}  // namespace blink