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1 /* | 1 /* |
2 * Copyright (C) 2012 Apple Inc. All rights reserved. | 2 * Copyright (C) 2012 Apple Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
11 * documentation and/or other materials provided with the distribution. | 11 * documentation and/or other materials provided with the distribution. |
12 * | 12 * |
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' | 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS | 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
23 * THE POSSIBILITY OF SUCH DAMAGE. | 23 * THE POSSIBILITY OF SUCH DAMAGE. |
24 */ | 24 */ |
25 | 25 |
26 #ifndef ScrollingConstraints_h | 26 #ifndef ScrollingConstraints_h |
27 #define ScrollingConstraints_h | 27 #define ScrollingConstraints_h |
28 | 28 |
29 #include "core/platform/graphics/FloatRect.h" | 29 #include "platform/geometry/FloatRect.h" |
30 | 30 |
31 namespace WebCore { | 31 namespace WebCore { |
32 | 32 |
33 // ViewportConstraints classes encapsulate data and logic required to reposition
elements whose layout | 33 // ViewportConstraints classes encapsulate data and logic required to reposition
elements whose layout |
34 // depends on the viewport rect (positions fixed and sticky), when scrolling and
zooming. | 34 // depends on the viewport rect (positions fixed and sticky), when scrolling and
zooming. |
35 class ViewportConstraints { | 35 class ViewportConstraints { |
36 public: | 36 public: |
37 enum ConstraintType { | 37 enum ConstraintType { |
38 FixedPositionConstaint, | 38 FixedPositionConstaint, |
39 StickyPositionConstraint | 39 StickyPositionConstraint |
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180 float m_bottomOffset; | 180 float m_bottomOffset; |
181 FloatRect m_absoluteContainingBlockRect; | 181 FloatRect m_absoluteContainingBlockRect; |
182 FloatRect m_absoluteStickyBoxRect; | 182 FloatRect m_absoluteStickyBoxRect; |
183 FloatSize m_stickyOffsetAtLastLayout; | 183 FloatSize m_stickyOffsetAtLastLayout; |
184 FloatPoint m_layerPositionAtLastLayout; | 184 FloatPoint m_layerPositionAtLastLayout; |
185 }; | 185 }; |
186 | 186 |
187 } // namespace WebCore | 187 } // namespace WebCore |
188 | 188 |
189 #endif // ScrollingConstraints_h | 189 #endif // ScrollingConstraints_h |
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