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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
* Copyright (C) 2014 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(VIDEO)
#include "ContextDestructionObserver.h"
#include "FloatPoint.h"
#include "TextTrack.h"
#include "Timer.h"
namespace WebCore {
class HTMLDivElement;
class VTTCueBox;
class VTTScanner;
class WEBCORE_EXPORT VTTRegion final : public RefCounted<VTTRegion>, public ContextDestructionObserver {
public:
static Ref<VTTRegion> create(ScriptExecutionContext& context)
{
return adoptRef(*new VTTRegion(context));
}
virtual ~VTTRegion();
const String& id() const { return m_id; }
void setId(const String&);
double width() const { return m_width; }
ExceptionOr<void> setWidth(double);
unsigned lines() const { return m_lines; }
void setLines(unsigned);
double regionAnchorX() const { return m_regionAnchor.x(); }
ExceptionOr<void> setRegionAnchorX(double);
double regionAnchorY() const { return m_regionAnchor.y(); }
ExceptionOr<void> setRegionAnchorY(double);
double viewportAnchorX() const { return m_viewportAnchor.x(); }
ExceptionOr<void> setViewportAnchorX(double);
double viewportAnchorY() const { return m_viewportAnchor.y(); }
ExceptionOr<void> setViewportAnchorY(double);
enum class ScrollSetting : bool { EmptyString, Up };
ScrollSetting scroll() const { return m_scroll; }
void setScroll(const ScrollSetting);
void updateParametersFromRegion(const VTTRegion&);
const String& regionSettings() const { return m_settings; }
void setRegionSettings(const String&);
HTMLDivElement& getDisplayTree();
void appendTextTrackCueBox(Ref<TextTrackCueBox>&&);
void displayLastTextTrackCueBox();
void willRemoveTextTrackCueBox(VTTCueBox*);
void cueStyleChanged() { m_recalculateStyles = true; }
private:
VTTRegion(ScriptExecutionContext&);
void prepareRegionDisplayTree();
// The timer is needed to continue processing when cue scrolling ended.
void startTimer();
void stopTimer();
void scrollTimerFired();
enum RegionSetting {
None,
Id,
Width,
Lines,
RegionAnchor,
ViewportAnchor,
Scroll
};
RegionSetting scanSettingName(VTTScanner&);
void parseSettingValue(RegionSetting, VTTScanner&);
static const AtomString& textTrackCueContainerScrollingClass();
String m_id;
String m_settings;
double m_width { 100 };
unsigned m_lines { 3 };
FloatPoint m_regionAnchor { 0, 100 };
FloatPoint m_viewportAnchor { 0, 100 };
ScrollSetting m_scroll { ScrollSetting::EmptyString };
// The cue container is the container that is scrolled up to obtain the
// effect of scrolling cues when this is enabled for the regions.
RefPtr<HTMLDivElement> m_cueContainer;
RefPtr<HTMLDivElement> m_regionDisplayTree;
// Keep track of the current numeric value of the css "top" property.
double m_currentTop { 0 };
// The timer is used to display the next cue line after the current one has
// been displayed. It's main use is for scrolling regions and it triggers as
// soon as the animation for rolling out one line has finished, but
// currently it is used also for non-scrolling regions to use a single
// code path.
Timer m_scrollTimer;
bool m_recalculateStyles { true };
};
} // namespace WebCore
#endif
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