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      1 /*
      2  * Copyright (C) 2006 Apple Computer, 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
      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 ScrollTypes_h
     27 #define ScrollTypes_h
     28 
     29 #include "wtf/Assertions.h"
     30 
     31 namespace WebCore {
     32 
     33     enum ScrollDirection {
     34         ScrollUp,
     35         ScrollDown,
     36         ScrollLeft,
     37         ScrollRight
     38     };
     39 
     40     enum ScrollLogicalDirection {
     41         ScrollBlockDirectionBackward,
     42         ScrollBlockDirectionForward,
     43         ScrollInlineDirectionBackward,
     44         ScrollInlineDirectionForward
     45     };
     46 
     47 
     48     inline ScrollDirection logicalToPhysical(ScrollLogicalDirection direction, bool isVertical, bool isFlipped)
     49     {
     50         switch (direction) {
     51         case ScrollBlockDirectionBackward: {
     52             if (isVertical) {
     53                 if (!isFlipped)
     54                     return ScrollUp;
     55                 return ScrollDown;
     56             } else {
     57                 if (!isFlipped)
     58                     return ScrollLeft;
     59                 return ScrollRight;
     60             }
     61             break;
     62         }
     63         case ScrollBlockDirectionForward: {
     64             if (isVertical) {
     65                 if (!isFlipped)
     66                     return ScrollDown;
     67                 return ScrollUp;
     68             } else {
     69                 if (!isFlipped)
     70                     return ScrollRight;
     71                 return ScrollLeft;
     72             }
     73             break;
     74         }
     75         case ScrollInlineDirectionBackward: {
     76             if (isVertical) {
     77                 if (!isFlipped)
     78                     return ScrollLeft;
     79                 return ScrollRight;
     80             } else {
     81                 if (!isFlipped)
     82                     return ScrollUp;
     83                 return ScrollDown;
     84             }
     85             break;
     86         }
     87         case ScrollInlineDirectionForward: {
     88             if (isVertical) {
     89                 if (!isFlipped)
     90                     return ScrollRight;
     91                 return ScrollLeft;
     92             } else {
     93                 if (!isFlipped)
     94                     return ScrollDown;
     95                 return ScrollUp;
     96             }
     97             break;
     98         }
     99         default:
    100             ASSERT_NOT_REACHED();
    101             break;
    102         }
    103         return ScrollUp;
    104     }
    105 
    106     enum ScrollGranularity {
    107         ScrollByLine,
    108         ScrollByPage,
    109         ScrollByDocument,
    110         ScrollByPixel,
    111         ScrollByPrecisePixel
    112     };
    113 
    114     enum ScrollElasticity {
    115         ScrollElasticityAutomatic,
    116         ScrollElasticityNone,
    117         ScrollElasticityAllowed
    118     };
    119 
    120     enum ScrollbarOrientation { HorizontalScrollbar, VerticalScrollbar };
    121 
    122     enum ScrollbarMode { ScrollbarAuto, ScrollbarAlwaysOff, ScrollbarAlwaysOn };
    123 
    124     enum ScrollbarControlSize { RegularScrollbar, SmallScrollbar };
    125 
    126     typedef unsigned ScrollbarControlState;
    127 
    128     enum ScrollbarControlStateMask {
    129         ActiveScrollbarState = 1,
    130         EnabledScrollbarState = 1 << 1,
    131         PressedScrollbarState = 1 << 2
    132     };
    133 
    134     enum ScrollbarPart {
    135         NoPart = 0,
    136         BackButtonStartPart = 1,
    137         ForwardButtonStartPart = 1 << 1,
    138         BackTrackPart = 1 << 2,
    139         ThumbPart = 1 << 3,
    140         ForwardTrackPart = 1 << 4,
    141         BackButtonEndPart = 1 << 5,
    142         ForwardButtonEndPart = 1 << 6,
    143         ScrollbarBGPart = 1 << 7,
    144         TrackBGPart = 1 << 8,
    145         AllParts = 0xffffffff
    146     };
    147 
    148     enum ScrollbarButtonsPlacement {
    149         ScrollbarButtonsNone,
    150         ScrollbarButtonsSingle,
    151         ScrollbarButtonsDoubleStart,
    152         ScrollbarButtonsDoubleEnd,
    153         ScrollbarButtonsDoubleBoth
    154     };
    155 
    156     enum ScrollbarOverlayStyle {
    157         ScrollbarOverlayStyleDefault,
    158         ScrollbarOverlayStyleDark,
    159         ScrollbarOverlayStyleLight
    160     };
    161 
    162     typedef unsigned ScrollbarControlPartMask;
    163 
    164 }
    165 
    166 #endif
    167