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| 1 /* | 1 /* |
| 2 * Copyright (c) 2010, Google Inc. All rights reserved. | 2 * Copyright (c) 2010, Google 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 are | 5 * modification, are permitted provided that the following conditions are |
| 6 * met: | 6 * met: |
| 7 * | 7 * |
| 8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 */ | 29 */ |
| 30 | 30 |
| 31 #include "config.h" | 31 #include "config.h" |
| 32 #include "platform/scroll/ScrollAnimatorBase.h" | 32 #include "platform/scroll/ScrollAnimatorBase.h" |
| 33 | 33 |
| 34 #include "platform/RuntimeEnabledFeatures.h" | 34 #include "platform/RuntimeEnabledFeatures.h" |
| 35 #include "platform/geometry/FloatPoint.h" | 35 #include "platform/geometry/FloatPoint.h" |
| 36 #include "platform/scroll/ScrollableArea.h" | 36 #include "platform/scroll/ScrollableArea.h" |
| 37 #include "wtf/MathExtras.h" |
| 37 #include "wtf/PassOwnPtr.h" | 38 #include "wtf/PassOwnPtr.h" |
| 38 #include <algorithm> | |
| 39 | 39 |
| 40 namespace blink { | 40 namespace blink { |
| 41 | 41 |
| 42 ScrollAnimatorBase::ScrollAnimatorBase(ScrollableArea* scrollableArea) | 42 ScrollAnimatorBase::ScrollAnimatorBase(ScrollableArea* scrollableArea) |
| 43 : m_scrollableArea(scrollableArea) | 43 : m_scrollableArea(scrollableArea) |
| 44 , m_currentPosX(0) | 44 , m_currentPosX(0) |
| 45 , m_currentPosY(0) | 45 , m_currentPosY(0) |
| 46 { | 46 { |
| 47 } | 47 } |
| 48 | 48 |
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| 92 | 92 |
| 93 void ScrollAnimatorBase::notifyPositionChanged() | 93 void ScrollAnimatorBase::notifyPositionChanged() |
| 94 { | 94 { |
| 95 m_scrollableArea->scrollPositionChanged(DoublePoint(m_currentPosX, m_current
PosY), UserScroll); | 95 m_scrollableArea->scrollPositionChanged(DoublePoint(m_currentPosX, m_current
PosY), UserScroll); |
| 96 } | 96 } |
| 97 | 97 |
| 98 float ScrollAnimatorBase::clampScrollPosition(ScrollbarOrientation orientation,
float pos) const | 98 float ScrollAnimatorBase::clampScrollPosition(ScrollbarOrientation orientation,
float pos) const |
| 99 { | 99 { |
| 100 float maxScrollPos = m_scrollableArea->maximumScrollPosition(orientation); | 100 float maxScrollPos = m_scrollableArea->maximumScrollPosition(orientation); |
| 101 float minScrollPos = m_scrollableArea->minimumScrollPosition(orientation); | 101 float minScrollPos = m_scrollableArea->minimumScrollPosition(orientation); |
| 102 return std::max(std::min(pos, maxScrollPos), minScrollPos); | 102 return clampTo(pos, minScrollPos, maxScrollPos); |
| 103 } | 103 } |
| 104 | 104 |
| 105 DEFINE_TRACE(ScrollAnimatorBase) | 105 DEFINE_TRACE(ScrollAnimatorBase) |
| 106 { | 106 { |
| 107 visitor->trace(m_scrollableArea); | 107 visitor->trace(m_scrollableArea); |
| 108 } | 108 } |
| 109 | 109 |
| 110 } // namespace blink | 110 } // namespace blink |
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