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1 /* | 1 /* |
2 * Copyright (C) 2008, 2011 Apple Inc. All Rights Reserved. | 2 * Copyright (C) 2008, 2011 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 |
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191 | 191 |
192 // NOTE: Only called from Internals for testing. | 192 // NOTE: Only called from Internals for testing. |
193 void setScrollOffsetFromInternals(const IntPoint&); | 193 void setScrollOffsetFromInternals(const IntPoint&); |
194 | 194 |
195 IntPoint clampScrollPosition(const IntPoint&) const; | 195 IntPoint clampScrollPosition(const IntPoint&) const; |
196 | 196 |
197 // Let subclasses provide a way of asking for and servicing scroll | 197 // Let subclasses provide a way of asking for and servicing scroll |
198 // animations. | 198 // animations. |
199 bool scheduleAnimation(); | 199 bool scheduleAnimation(); |
200 void serviceScrollAnimations(double monotonicTime); | 200 void serviceScrollAnimations(double monotonicTime); |
| 201 virtual void registerForAnimation() { } |
| 202 virtual void deregisterForAnimation() { } |
201 | 203 |
202 virtual bool usesCompositedScrolling() const { return false; } | 204 virtual bool usesCompositedScrolling() const { return false; } |
203 | 205 |
204 // Returns true if the GraphicsLayer tree needs to be rebuilt. | 206 // Returns true if the GraphicsLayer tree needs to be rebuilt. |
205 virtual bool updateAfterCompositingChange() { return false; } | 207 virtual bool updateAfterCompositingChange() { return false; } |
206 | 208 |
207 virtual bool userInputScrollable(ScrollbarOrientation) const = 0; | 209 virtual bool userInputScrollable(ScrollbarOrientation) const = 0; |
208 virtual bool shouldPlaceVerticalScrollbarOnLeft() const = 0; | 210 virtual bool shouldPlaceVerticalScrollbarOnLeft() const = 0; |
209 | 211 |
210 // Convenience functions | 212 // Convenience functions |
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309 // vertical-lr / ltr NO NO | 311 // vertical-lr / ltr NO NO |
310 // vertical-lr / rtl NO YES | 312 // vertical-lr / rtl NO YES |
311 // vertical-rl / ltr YES NO | 313 // vertical-rl / ltr YES NO |
312 // vertical-rl / rtl YES YES | 314 // vertical-rl / rtl YES YES |
313 IntPoint m_scrollOrigin; | 315 IntPoint m_scrollOrigin; |
314 }; | 316 }; |
315 | 317 |
316 } // namespace blink | 318 } // namespace blink |
317 | 319 |
318 #endif // ScrollableArea_h | 320 #endif // ScrollableArea_h |
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