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Diffstat (limited to 'Source/WebKit/chromium/src/DragScrollTimer.cpp')
-rw-r--r-- | Source/WebKit/chromium/src/DragScrollTimer.cpp | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/Source/WebKit/chromium/src/DragScrollTimer.cpp b/Source/WebKit/chromium/src/DragScrollTimer.cpp deleted file mode 100644 index c994cd77c..000000000 --- a/Source/WebKit/chromium/src/DragScrollTimer.cpp +++ /dev/null @@ -1,126 +0,0 @@ -/* - * Copyright (C) 2010 Google 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 "DragScrollTimer.h" - -#include "FrameView.h" - -using namespace WebCore; - -namespace WebKit { - -// Computes the distance from a point outside a rect to the nearest edge of the rect. -static IntSize distanceToRect(const IntPoint& point, const IntRect& rect) -{ - int dx = 0, dy = 0; - if (point.x() < rect.x()) - dx = point.x() - rect.x(); - else if (rect.maxX() < point.x()) - dx = point.x() - rect.maxX(); - if (point.y() < rect.y()) - dy = point.y() - rect.y(); - else if (rect.maxY() < point.y()) - dy = point.y() - rect.maxY(); - return IntSize(dx, dy); -} - -DragScrollTimer::DragScrollTimer() - : m_timer(this, &DragScrollTimer::fired) - , m_view(0) - , m_scrolling(false) -{ -} - -DragScrollTimer::~DragScrollTimer() -{ - // We do this for detecting dead object earlier - stop(); -} - -void DragScrollTimer::stop() -{ - m_timer.stop(); - m_view = 0; - m_scrolling = false; -} - -void DragScrollTimer::scroll() -{ - m_view->scrollBy(m_lastDistance); - m_scrolling = true; -} - -void DragScrollTimer::update() -{ - if (shouldScroll()) - scroll(); - else - stop(); -} - -void DragScrollTimer::triggerScroll(FrameView* view, const WebPoint& location) -{ - if (!view) - return; - - // Approximates Safari - static const double scrollStartDelay = 0.2; - - m_view = view; - m_lastDistance = scrollDistanceFor(view, location); - - if (m_scrolling) - update(); - else if (shouldScroll() && !m_timer.isActive()) - m_timer.startOneShot(scrollStartDelay); -} - -IntSize DragScrollTimer::scrollDistanceFor(FrameView* view, const WebPoint& location) const -{ - static const int scrollMargin = 30; - - IntRect bounds(0, 0, view->visibleWidth(), view->visibleHeight()); - if (!bounds.contains(location)) - return IntSize(0, 0); // The location is outside the border belt. - - bounds.setY(bounds.y() + scrollMargin); - bounds.setHeight(bounds.height() - scrollMargin * 2); - bounds.setX(bounds.x() + scrollMargin); - bounds.setWidth(bounds.width() - scrollMargin * 2); - - if (bounds.contains(location)) - return IntSize(0, 0); // The location is inside the border belt. - - // The location is over the border belt. - return distanceToRect(location, bounds); -} - -} // namespace WebKit |