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// 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 "config.h"
#include "modules/screen_orientation/ScreenOrientationController.h"
#include "core/dom/Document.h"
#include "core/frame/LocalDOMWindow.h"
#include "core/frame/FrameView.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/Screen.h"
#include "core/page/Page.h"
#include "platform/LayoutTestSupport.h"
#include "platform/PlatformScreen.h"
#include "public/platform/WebScreenOrientationClient.h"
namespace WebCore {
ScreenOrientationController::~ScreenOrientationController()
{
}
void ScreenOrientationController::persistentHostHasBeenDestroyed()
{
// Unregister lifecycle observation once page is being torn down.
observeContext(0);
}
void ScreenOrientationController::provideTo(LocalFrame& frame, blink::WebScreenOrientationClient* client)
{
ScreenOrientationController* controller = new ScreenOrientationController(frame, client);
WillBeHeapSupplement<LocalFrame>::provideTo(frame, supplementName(), adoptPtrWillBeNoop(controller));
}
ScreenOrientationController& ScreenOrientationController::from(LocalFrame& frame)
{
return *static_cast<ScreenOrientationController*>(WillBeHeapSupplement<LocalFrame>::from(frame, supplementName()));
}
ScreenOrientationController::ScreenOrientationController(LocalFrame& frame, blink::WebScreenOrientationClient* client)
: PageLifecycleObserver(frame.page())
, m_overrideOrientation(blink::WebScreenOrientationUndefined)
, m_client(client)
, m_frame(frame)
{
}
const char* ScreenOrientationController::supplementName()
{
return "ScreenOrientationController";
}
// Compute the screen orientation using the orientation angle and the screen width / height.
blink::WebScreenOrientationType ScreenOrientationController::computeOrientation(FrameView* view)
{
// Bypass orientation detection in layout tests to get consistent results.
// FIXME: The screen dimension should be fixed when running the layout tests to avoid such
// issues.
if (isRunningLayoutTest())
return blink::WebScreenOrientationPortraitPrimary;
FloatRect rect = screenRect(view);
uint16_t rotation = screenOrientationAngle(view);
bool isTallDisplay = rotation % 180 ? rect.height() < rect.width() : rect.height() > rect.width();
switch (rotation) {
case 0:
return isTallDisplay ? blink::WebScreenOrientationPortraitPrimary : blink::WebScreenOrientationLandscapePrimary;
case 90:
return isTallDisplay ? blink::WebScreenOrientationLandscapePrimary : blink::WebScreenOrientationPortraitSecondary;
case 180:
return isTallDisplay ? blink::WebScreenOrientationPortraitSecondary : blink::WebScreenOrientationLandscapeSecondary;
case 270:
return isTallDisplay ? blink::WebScreenOrientationLandscapeSecondary : blink::WebScreenOrientationPortraitPrimary;
default:
ASSERT_NOT_REACHED();
return blink::WebScreenOrientationPortraitPrimary;
}
}
void ScreenOrientationController::pageVisibilityChanged()
{
if (page() && page()->visibilityState() == PageVisibilityStateVisible) {
blink::WebScreenOrientationType oldOrientation = m_overrideOrientation;
m_overrideOrientation = blink::WebScreenOrientationUndefined;
// FIXME: sendOrientationChangeEvent() currently send an event all the
// children of the frame, so it should only be called on the frame on
// top of the tree. We would need the embedder to call
// sendOrientationChangeEvent on every WebFrame part of a WebView to be
// able to remove this.
if (m_frame == m_frame.localFrameRoot() && oldOrientation != orientation())
m_frame.sendOrientationChangeEvent();
} else if (m_overrideOrientation == blink::WebScreenOrientationUndefined) {
// The page is no longer visible, store the last know screen orientation
// so that we keep returning this orientation until the page becomes
// visible again.
m_overrideOrientation = orientation();
}
}
blink::WebScreenOrientationType ScreenOrientationController::orientation() const
{
if (m_overrideOrientation != blink::WebScreenOrientationUndefined) {
// The page is not visible, keep returning the last known screen orientation.
ASSERT(!page() || page()->visibilityState() != PageVisibilityStateVisible);
return m_overrideOrientation;
}
blink::WebScreenOrientationType orientationType = screenOrientationType(m_frame.view());
if (orientationType == blink::WebScreenOrientationUndefined) {
// The embedder could not provide us with an orientation, deduce it ourselves.
orientationType = computeOrientation(m_frame.view());
}
ASSERT(orientationType != blink::WebScreenOrientationUndefined);
return orientationType;
}
void ScreenOrientationController::lockOrientation(blink::WebScreenOrientationLockType orientation, blink::WebLockOrientationCallback* callback)
{
if (!m_client) {
return;
}
m_client->lockOrientation(orientation, callback);
}
void ScreenOrientationController::unlockOrientation()
{
if (!m_client) {
return;
}
m_client->unlockOrientation();
}
} // namespace WebCore
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