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Side by Side Diff: third_party/WebKit/WebCore/platform/ScrollView.cpp

Issue 39293: WebKit merge 41447:41498 [third_party/WebKit] (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: remove CRLF Created 11 years, 9 months ago
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1 /* 1 /*
2 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved. 2 * Copyright (C) 2006, 2007, 2008 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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606 606
607 // Determine how much we want to scroll. If we can move at all, we will acc ept the event. 607 // Determine how much we want to scroll. If we can move at all, we will acc ept the event.
608 IntSize maxScrollDelta = maximumScrollPosition() - scrollPosition(); 608 IntSize maxScrollDelta = maximumScrollPosition() - scrollPosition();
609 if ((e.deltaX() < 0 && maxScrollDelta.width() > 0) || 609 if ((e.deltaX() < 0 && maxScrollDelta.width() > 0) ||
610 (e.deltaX() > 0 && scrollOffset().width() > 0) || 610 (e.deltaX() > 0 && scrollOffset().width() > 0) ||
611 (e.deltaY() < 0 && maxScrollDelta.height() > 0) || 611 (e.deltaY() < 0 && maxScrollDelta.height() > 0) ||
612 (e.deltaY() > 0 && scrollOffset().height() > 0)) { 612 (e.deltaY() > 0 && scrollOffset().height() > 0)) {
613 e.accept(); 613 e.accept();
614 float deltaX = e.deltaX(); 614 float deltaX = e.deltaX();
615 float deltaY = e.deltaY(); 615 float deltaY = e.deltaY();
616 if (e.granularity() == ScrollByLineWheelEvent) { 616 if (e.granularity() == ScrollByPageWheelEvent) {
617 deltaX *= cMouseWheelPixelsPerLineStep;
618 deltaY *= cMouseWheelPixelsPerLineStep;
619 } else if (e.granularity() == ScrollByPageWheelEvent) {
620 ASSERT(deltaX == 0); 617 ASSERT(deltaX == 0);
621 bool negative = deltaY < 0; 618 bool negative = deltaY < 0;
622 deltaY = max(0, visibleHeight() - cAmountToKeepWhenPaging); 619 deltaY = max(0, visibleHeight() - cAmountToKeepWhenPaging);
623 if (negative) 620 if (negative)
624 deltaY = -deltaY; 621 deltaY = -deltaY;
625 } 622 }
626 scrollBy(IntSize(-deltaX, -deltaY)); 623 scrollBy(IntSize(-deltaX, -deltaY));
627 } 624 }
628 } 625 }
629 626
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920 bool ScrollView::platformHasVerticalAdjustment() const 917 bool ScrollView::platformHasVerticalAdjustment() const
921 { 918 {
922 return false; 919 return false;
923 } 920 }
924 921
925 #endif 922 #endif
926 923
927 } 924 }
928 925
929 926
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