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      1 /*
      2  * Copyright (C) 2012 Victor Carbune (victor (at) rosedu.org)
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef RenderVTTCue_h
     27 #define RenderVTTCue_h
     28 
     29 #include "core/rendering/RenderBlockFlow.h"
     30 #include "core/rendering/RenderInline.h"
     31 #include "platform/geometry/FloatPoint.h"
     32 
     33 namespace WebCore {
     34 
     35 class VTTCue;
     36 class VTTCueBox;
     37 
     38 class RenderVTTCue FINAL : public RenderBlockFlow {
     39 public:
     40     explicit RenderVTTCue(VTTCueBox*);
     41 
     42 private:
     43     virtual void layout() OVERRIDE;
     44     virtual bool supportsPartialLayout() const OVERRIDE { return false; }
     45 
     46     bool isOutside() const;
     47     bool isOverlapping() const;
     48     bool shouldSwitchDirection(InlineFlowBox*, LayoutUnit) const;
     49 
     50     void moveBoxesByStep(LayoutUnit);
     51     bool switchDirection(bool&, LayoutUnit&);
     52 
     53     bool findFirstLineBox(InlineFlowBox*&);
     54     bool initializeLayoutParameters(InlineFlowBox*, LayoutUnit&, LayoutUnit&);
     55     void placeBoxInDefaultPosition(LayoutUnit, bool&);
     56     void repositionCueSnapToLinesSet();
     57     void repositionCueSnapToLinesNotSet();
     58 
     59     VTTCue* m_cue;
     60     FloatPoint m_fallbackPosition;
     61 };
     62 
     63 } // namespace WebCore
     64 
     65 #endif // RenderVTTCue_h
     66