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/*
* Copyright (c) 2010, Google Inc. All rights reserved.
* Copyright (C) 2008, 2011 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ScrollableArea.h"
#include "FloatPoint.h"
#include "PlatformWheelEvent.h"
#include "ScrollAnimator.h"
#include <wtf/PassOwnPtr.h>
namespace WebCore {
ScrollableArea::ScrollableArea()
: m_scrollAnimator(ScrollAnimator::create(this))
{
}
ScrollableArea::~ScrollableArea()
{
}
bool ScrollableArea::scroll(ScrollDirection direction, ScrollGranularity granularity, float multiplier)
{
ScrollbarOrientation orientation;
Scrollbar* scrollbar;
if (direction == ScrollUp || direction == ScrollDown) {
orientation = VerticalScrollbar;
scrollbar = verticalScrollbar();
} else {
orientation = HorizontalScrollbar;
scrollbar = horizontalScrollbar();
}
if (!scrollbar)
return false;
float step = 0;
switch (granularity) {
case ScrollByLine:
step = scrollbar->lineStep();
break;
case ScrollByPage:
step = scrollbar->pageStep();
break;
case ScrollByDocument:
step = scrollbar->totalSize();
break;
case ScrollByPixel:
step = scrollbar->pixelStep();
break;
}
if (direction == ScrollUp || direction == ScrollLeft)
multiplier = -multiplier;
return m_scrollAnimator->scroll(orientation, granularity, step, multiplier);
}
void ScrollableArea::scrollToOffsetWithoutAnimation(const FloatPoint& offset)
{
m_scrollAnimator->scrollToOffsetWithoutAnimation(offset);
}
void ScrollableArea::scrollToOffsetWithoutAnimation(ScrollbarOrientation orientation, float offset)
{
if (orientation == HorizontalScrollbar)
scrollToXOffsetWithoutAnimation(offset);
else
scrollToYOffsetWithoutAnimation(offset);
}
void ScrollableArea::scrollToXOffsetWithoutAnimation(float x)
{
scrollToOffsetWithoutAnimation(FloatPoint(x, m_scrollAnimator->currentPosition().y()));
}
void ScrollableArea::scrollToYOffsetWithoutAnimation(float y)
{
scrollToOffsetWithoutAnimation(FloatPoint(m_scrollAnimator->currentPosition().x(), y));
}
void ScrollableArea::setScrollOffsetFromAnimation(const IntPoint& offset)
{
// Tell the derived class to scroll its contents.
setScrollOffset(offset);
// Tell the scrollbars to update their thumb postions.
if (Scrollbar* horizontalScrollbar = this->horizontalScrollbar())
horizontalScrollbar->offsetDidChange();
if (Scrollbar* verticalScrollbar = this->verticalScrollbar())
verticalScrollbar->offsetDidChange();
}
} // namespace WebCore
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