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| 1 /* | |
| 2 * Copyright (C) 2013 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #ifndef TextTrackRegion_h | |
| 32 #define TextTrackRegion_h | |
| 33 | |
| 34 #include "core/dom/ContextLifecycleObserver.h" | |
| 35 #include "core/html/track/TextTrack.h" | |
| 36 #include "platform/Timer.h" | |
| 37 #include "platform/geometry/FloatPoint.h" | |
| 38 #include "wtf/PassOwnPtr.h" | |
| 39 #include "wtf/RefCounted.h" | |
| 40 | |
| 41 namespace WebCore { | |
| 42 | |
| 43 class ExceptionState; | |
| 44 class HTMLDivElement; | |
| 45 class TextTrackCueBox; | |
| 46 | |
| 47 class TextTrackRegion : public RefCounted<TextTrackRegion> { | |
| 48 public: | |
| 49 static PassRefPtr<TextTrackRegion> create() | |
| 50 { | |
| 51 return adoptRef(new TextTrackRegion()); | |
| 52 } | |
| 53 | |
| 54 virtual ~TextTrackRegion(); | |
| 55 | |
| 56 TextTrack* track() const { return m_track; } | |
| 57 void setTrack(TextTrack*); | |
| 58 | |
| 59 const String& id() const { return m_id; } | |
| 60 void setId(const String&); | |
| 61 | |
| 62 double width() const { return m_width; } | |
| 63 void setWidth(double, ExceptionState&); | |
| 64 | |
| 65 long height() const { return m_heightInLines; } | |
| 66 void setHeight(long, ExceptionState&); | |
| 67 | |
| 68 double regionAnchorX() const { return m_regionAnchor.x(); } | |
| 69 void setRegionAnchorX(double, ExceptionState&); | |
| 70 | |
| 71 double regionAnchorY() const { return m_regionAnchor.y(); } | |
| 72 void setRegionAnchorY(double, ExceptionState&); | |
| 73 | |
| 74 double viewportAnchorX() const { return m_viewportAnchor.x(); } | |
| 75 void setViewportAnchorX(double, ExceptionState&); | |
| 76 | |
| 77 double viewportAnchorY() const { return m_viewportAnchor.y(); } | |
| 78 void setViewportAnchorY(double, ExceptionState&); | |
| 79 | |
| 80 const AtomicString scroll() const; | |
| 81 void setScroll(const AtomicString&, ExceptionState&); | |
| 82 | |
| 83 void updateParametersFromRegion(TextTrackRegion*); | |
| 84 | |
| 85 const String& regionSettings() const { return m_settings; } | |
| 86 void setRegionSettings(const String&); | |
| 87 | |
| 88 bool isScrollingRegion() { return m_scroll; } | |
| 89 | |
| 90 PassRefPtr<HTMLDivElement> getDisplayTree(Document&); | |
| 91 | |
| 92 void appendTextTrackCueBox(PassRefPtr<TextTrackCueBox>); | |
| 93 void displayLastTextTrackCueBox(); | |
| 94 void willRemoveTextTrackCueBox(TextTrackCueBox*); | |
| 95 | |
| 96 private: | |
| 97 TextTrackRegion(); | |
| 98 | |
| 99 void prepareRegionDisplayTree(); | |
| 100 | |
| 101 // The timer is needed to continue processing when cue scrolling ended. | |
| 102 void startTimer(); | |
| 103 void stopTimer(); | |
| 104 void scrollTimerFired(Timer<TextTrackRegion>*); | |
| 105 | |
| 106 enum RegionSetting { | |
| 107 None, | |
| 108 Id, | |
| 109 Width, | |
| 110 Height, | |
| 111 RegionAnchor, | |
| 112 ViewportAnchor, | |
| 113 Scroll | |
| 114 }; | |
| 115 RegionSetting getSettingFromString(const String&); | |
| 116 void parseSettingValue(RegionSetting, const String&); | |
| 117 void parseSetting(const String&, unsigned*); | |
| 118 | |
| 119 static const AtomicString& textTrackCueContainerShadowPseudoId(); | |
| 120 static const AtomicString& textTrackCueContainerScrollingClass(); | |
| 121 static const AtomicString& textTrackRegionShadowPseudoId(); | |
| 122 | |
| 123 String m_id; | |
| 124 String m_settings; | |
| 125 double m_width; | |
| 126 unsigned m_heightInLines; | |
| 127 FloatPoint m_regionAnchor; | |
| 128 FloatPoint m_viewportAnchor; | |
| 129 bool m_scroll; | |
| 130 | |
| 131 // The cue container is the container that is scrolled up to obtain the | |
| 132 // effect of scrolling cues when this is enabled for the regions. | |
| 133 RefPtr<HTMLDivElement> m_cueContainer; | |
| 134 RefPtr<HTMLDivElement> m_regionDisplayTree; | |
| 135 | |
| 136 // The member variable track can be a raw pointer as it will never | |
| 137 // reference a destroyed TextTrack, as this member variable | |
| 138 // is cleared in the TextTrack destructor and it is generally | |
| 139 // set/reset within the addRegion and removeRegion methods. | |
| 140 TextTrack* m_track; | |
| 141 | |
| 142 // Keep track of the current numeric value of the css "top" property. | |
| 143 double m_currentTop; | |
| 144 | |
| 145 // The timer is used to display the next cue line after the current one has | |
| 146 // been displayed. It's main use is for scrolling regions and it triggers as | |
| 147 // soon as the animation for rolling out one line has finished, but | |
| 148 // currently it is used also for non-scrolling regions to use a single | |
| 149 // code path. | |
| 150 Timer<TextTrackRegion> m_scrollTimer; | |
| 151 }; | |
| 152 | |
| 153 } // namespace WebCore | |
| 154 #endif | |
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Chromium Code Reviews
Issue 55653003:
Rename TextTrackRegion/TextTrackRegionList to VTTRegion/VTTRegionList (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master