summaryrefslogtreecommitdiff
path: root/Source/WebKit/chromium/src/DragScrollTimer.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'Source/WebKit/chromium/src/DragScrollTimer.cpp')
-rw-r--r--Source/WebKit/chromium/src/DragScrollTimer.cpp126
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