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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
* Copyright (C) 2012-2020 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 "ActiveDOMObject.h"
#include "DocumentFragment.h"
#include "HTMLElement.h"
#include <wtf/JSONValues.h>
#include <wtf/MediaTime.h>
namespace WebCore {
class SpeechSynthesis;
class TextTrack;
class TextTrackCue;
class TextTrackCueBox : public HTMLElement {
WTF_MAKE_ISO_ALLOCATED(TextTrackCueBox);
public:
static Ref<TextTrackCueBox> create(Document&, TextTrackCue&);
TextTrackCue* getCue() const;
virtual void applyCSSProperties() { }
protected:
void initialize();
constexpr static auto CreateTextTrackCueBox = CreateHTMLElement | NodeFlag::HasCustomStyleResolveCallbacks;
TextTrackCueBox(Document&, TextTrackCue&);
~TextTrackCueBox() { }
private:
WeakPtr<TextTrackCue, WeakPtrImplWithEventTargetData> m_cue;
};
class TextTrackCue : public RefCounted<TextTrackCue>, public EventTarget, public ActiveDOMObject {
WTF_MAKE_ISO_ALLOCATED(TextTrackCue);
public:
static ExceptionOr<Ref<TextTrackCue>> create(Document&, double start, double end, DocumentFragment&);
TextTrack* track() const;
void setTrack(TextTrack*);
const AtomString& id() const { return m_id; }
void setId(const AtomString&);
double startTime() const { return startMediaTime().toDouble(); }
void setStartTime(double);
double endTime() const { return endMediaTime().toDouble(); }
void setEndTime(double);
bool pauseOnExit() const { return m_pauseOnExit; }
void setPauseOnExit(bool);
MediaTime startMediaTime() const { return m_startTime; }
void setStartTime(const MediaTime&);
MediaTime endMediaTime() const { return m_endTime; }
void setEndTime(const MediaTime&);
bool isActive() const;
virtual void setIsActive(bool);
virtual bool isOrderedBefore(const TextTrackCue*) const;
virtual bool isPositionedAbove(const TextTrackCue* cue) const { return isOrderedBefore(cue); }
bool hasEquivalentStartTime(const TextTrackCue&) const;
enum CueType { Generic, Data, ConvertedToWebVTT, WebVTT };
virtual CueType cueType() const { return CueType::Generic; }
virtual bool isRenderable() const;
enum CueMatchRules { MatchAllFields, IgnoreDuration };
bool isEqual(const TextTrackCue&, CueMatchRules) const;
void willChange();
virtual void didChange();
virtual RefPtr<TextTrackCueBox> getDisplayTree();
virtual void removeDisplayTree();
virtual RefPtr<DocumentFragment> getCueAsHTML();
virtual const String& text() const { return emptyString(); }
String toJSONString() const;
using RefCounted::ref;
using RefCounted::deref;
virtual void recalculateStyles() { m_displayTreeNeedsUpdate = true; }
virtual void setFontSize(int fontSize, bool important);
virtual void updateDisplayTree(const MediaTime&) { }
unsigned cueIndex() const;
using SpeakCueCompletionHandler = Function<void(const TextTrackCue&)>;
virtual void prepareToSpeak(SpeechSynthesis&, double, double, SpeakCueCompletionHandler&&) { }
virtual void beginSpeaking() { }
virtual void pauseSpeaking() { }
virtual void cancelSpeaking() { }
virtual bool cueContentsMatch(const TextTrackCue&) const;
protected:
TextTrackCue(Document&, const MediaTime& start, const MediaTime& end);
Document* document() const;
virtual void toJSON(JSON::Object&) const;
private:
TextTrackCue(Document&, const MediaTime& start, const MediaTime& end, Ref<DocumentFragment>&&);
// EventTarget
void refEventTarget() final { ref(); }
void derefEventTarget() final { deref(); }
using EventTarget::dispatchEvent;
void dispatchEvent(Event&) final;
EventTargetInterface eventTargetInterface() const final { return TextTrackCueEventTargetInterfaceType; }
ScriptExecutionContext* scriptExecutionContext() const final;
// ActiveDOMObject
const char* activeDOMObjectName() const final;
void rebuildDisplayTree();
AtomString m_id;
MediaTime m_startTime;
MediaTime m_endTime;
int m_processingCueChanges { 0 };
TextTrack* m_track { nullptr };
RefPtr<DocumentFragment> m_cueNode;
RefPtr<TextTrackCueBox> m_displayTree;
int m_fontSize { 0 };
bool m_fontSizeIsImportant { false };
bool m_isActive { false };
bool m_pauseOnExit { false };
bool m_displayTreeNeedsUpdate { true };
};
#ifndef NDEBUG
TextStream& operator<<(TextStream&, const TextTrackCue&);
#endif
} // namespace WebCore
namespace WTF {
template<typename> struct LogArgument;
template<> struct LogArgument<WebCore::TextTrackCue> {
static String toString(const WebCore::TextTrackCue& cue) { return cue.toJSONString(); }
};
}
#endif
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