void AutoscrollController::stopAutoscrollTimer(bool rendererIsBeingDestroyed)
{
RenderBox* scrollable = m_autoscrollRenderer;
m_autoscrollTimer.stop();
m_autoscrollRenderer = 0;
if (!scrollable)
return;
Frame& frame = scrollable->frame();
if (autoscrollInProgress() && frame.eventHandler().mouseDownWasInSubframe()) {
if (Frame* subframe = frame.eventHandler().subframeForTargetNode(frame.eventHandler().mousePressNode()))
subframe->eventHandler().stopAutoscrollTimer(rendererIsBeingDestroyed);
return;
}
if (!rendererIsBeingDestroyed)
scrollable->stopAutoscroll();
#if ENABLE(PAN_SCROLLING)
if (panScrollInProgress()) {
FrameView& frameView = scrollable->view().frameView();
frameView.removePanScrollIcon();
frameView.setCursor(pointerCursor());
}
#endif
m_autoscrollType = NoAutoscroll;
#if ENABLE(PAN_SCROLLING)
// If we're not in the top frame we notify it that we are not doing a panScroll any more.
if (!frame.isMainFrame())
frame.mainFrame().eventHandler().didPanScrollStop();
#endif
}
void AutoscrollController::updateDragAndDrop(Node* dropTargetNode, const IntPoint& eventPosition, double eventTime)
{
if (!dropTargetNode || !dropTargetNode->renderer()) {
stopAutoscroll();
return;
}
if (m_autoscrollRenderer && m_autoscrollRenderer->frame() != dropTargetNode->renderer()->frame())
return;
RenderBox* scrollable = RenderBox::findAutoscrollable(dropTargetNode->renderer());
if (!scrollable) {
stopAutoscroll();
return;
}
Page* page = scrollable->frame() ? scrollable->frame()->page() : 0;
if (!page) {
stopAutoscroll();
return;
}
IntSize offset = scrollable->calculateAutoscrollDirection(eventPosition);
if (offset.isZero()) {
stopAutoscroll();
return;
}
m_dragAndDropAutoscrollReferencePosition = eventPosition + offset;
if (m_autoscrollType == NoAutoscroll) {
m_autoscrollType = AutoscrollForDragAndDrop;
m_autoscrollRenderer = scrollable;
m_dragAndDropAutoscrollStartTime = eventTime;
startAutoscroll();
} else if (m_autoscrollRenderer != scrollable) {
m_dragAndDropAutoscrollStartTime = eventTime;
m_autoscrollRenderer = scrollable;
}
}
void AutoscrollController::stopAutoscroll()
{
RenderBox* scrollable = m_autoscrollRenderer;
m_autoscrollRenderer = 0;
if (!scrollable)
return;
scrollable->stopAutoscroll();
#if OS(WIN)
if (panScrollInProgress()) {
if (FrameView* view = scrollable->frame()->view()) {
view->removePanScrollIcon();
view->setCursor(pointerCursor());
}
}
#endif
m_autoscrollType = NoAutoscroll;
}