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 blink {
32
33 enum ScrollDirection {
34 ScrollUp,
35 ScrollDown,
36 ScrollLeft,
37 ScrollRight,
38
39 ScrollBlockDirectionBackward,
40 ScrollBlockDirectionForward,
41 ScrollInlineDirectionBackward,
42 ScrollInlineDirectionForward
43 };
44
isLogical(ScrollDirection direction)45 inline bool isLogical(ScrollDirection direction)
46 {
47 return direction >= ScrollBlockDirectionBackward;
48 }
49
50 // Convert logical scroll direction to physical. Physical scroll directions are unaffected.
toPhysicalDirection(ScrollDirection direction,bool isVertical,bool isFlipped)51 inline ScrollDirection toPhysicalDirection(ScrollDirection direction, bool isVertical, bool isFlipped)
52 {
53 switch (direction) {
54 case ScrollBlockDirectionBackward: {
55 if (isVertical) {
56 if (!isFlipped)
57 return ScrollUp;
58 return ScrollDown;
59 }
60 if (!isFlipped)
61 return ScrollLeft;
62 return ScrollRight;
63 }
64 case ScrollBlockDirectionForward: {
65 if (isVertical) {
66 if (!isFlipped)
67 return ScrollDown;
68 return ScrollUp;
69 }
70 if (!isFlipped)
71 return ScrollRight;
72 return ScrollLeft;
73 }
74 case ScrollInlineDirectionBackward: {
75 if (isVertical) {
76 if (!isFlipped)
77 return ScrollLeft;
78 return ScrollRight;
79 }
80 if (!isFlipped)
81 return ScrollUp;
82 return ScrollDown;
83 }
84 case ScrollInlineDirectionForward: {
85 if (isVertical) {
86 if (!isFlipped)
87 return ScrollRight;
88 return ScrollLeft;
89 }
90 if (!isFlipped)
91 return ScrollDown;
92 return ScrollUp;
93 }
94 // Direction is already physical
95 case ScrollUp:
96 case ScrollDown:
97 case ScrollLeft:
98 case ScrollRight:
99 return direction;
100 default:
101 ASSERT_NOT_REACHED();
102 break;
103 }
104 return direction;
105 }
106
107 enum ScrollGranularity {
108 ScrollByLine,
109 ScrollByPage,
110 ScrollByDocument,
111 ScrollByPixel,
112 ScrollByPrecisePixel
113 };
114
115 enum ScrollElasticity {
116 ScrollElasticityAutomatic,
117 ScrollElasticityNone,
118 ScrollElasticityAllowed
119 };
120
121 enum ScrollbarOrientation { HorizontalScrollbar, VerticalScrollbar };
122
123 enum ScrollbarMode { ScrollbarAuto, ScrollbarAlwaysOff, ScrollbarAlwaysOn };
124
125 enum ScrollbarControlSize { RegularScrollbar, SmallScrollbar };
126
127 typedef unsigned ScrollbarControlState;
128
129 enum ScrollbarControlStateMask {
130 ActiveScrollbarState = 1,
131 EnabledScrollbarState = 1 << 1,
132 PressedScrollbarState = 1 << 2
133 };
134
135 enum ScrollbarPart {
136 NoPart = 0,
137 BackButtonStartPart = 1,
138 ForwardButtonStartPart = 1 << 1,
139 BackTrackPart = 1 << 2,
140 ThumbPart = 1 << 3,
141 ForwardTrackPart = 1 << 4,
142 BackButtonEndPart = 1 << 5,
143 ForwardButtonEndPart = 1 << 6,
144 ScrollbarBGPart = 1 << 7,
145 TrackBGPart = 1 << 8,
146 AllParts = 0xffffffff
147 };
148
149 enum ScrollbarButtonsPlacement {
150 ScrollbarButtonsNone,
151 ScrollbarButtonsSingle,
152 ScrollbarButtonsDoubleStart,
153 ScrollbarButtonsDoubleEnd,
154 ScrollbarButtonsDoubleBoth
155 };
156
157 enum ScrollbarOverlayStyle {
158 ScrollbarOverlayStyleDefault,
159 ScrollbarOverlayStyleDark,
160 ScrollbarOverlayStyleLight
161 };
162
163 typedef unsigned ScrollbarControlPartMask;
164
165 }
166
167 #endif
168