ScrollbarPart ScrollbarThemeQt::hitTest(Scrollbar* scrollbar, const PlatformMouseEvent& evt)
{
QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
const QPoint pos = scrollbar->convertFromContainingWindow(evt.pos());
opt->rect.moveTo(QPoint(0, 0));
QStyle::SubControl sc = style()->hitTestComplexControl(QStyle::CC_ScrollBar, opt, pos, 0);
return scrollbarPart(sc);
}
bool PlatformScrollbar::handleMousePressEvent(const PlatformMouseEvent& e)
{
if (!parent())
return true;
// TODO(pkasting): http://b/583875 Right-click should invoke a context menu
// (maybe this would be better handled elsewhere?)
if (!m_enabled || (e.button() != LeftButton)) {
return true;
}
ASSERT(m_captureStart == None);
IntPoint pos = convertFromContainingWindow(e.pos());
const bool horz = (orientation() == HorizontalScrollbar);
updateMousePosition(pos.x(), pos.y());
switch (m_mouseOver) {
case Arrow1:
scroll(horz ? ScrollLeft : ScrollUp, ScrollByLine);
break;
case Track:
return true;
case BeforeThumb:
scroll(horz ? ScrollLeft : ScrollUp, ScrollByPage);
break;
case Thumb:
m_dragOrigin.thumbPos = horz ? pos.x() : pos.y();
m_dragOrigin.scrollVal = value();
break;
case AfterThumb:
scroll(horz ? ScrollRight : ScrollDown, ScrollByPage);
break;
case Arrow2:
scroll(horz ? ScrollRight : ScrollDown, ScrollByLine);
break;
default:
ASSERT_NOT_REACHED();
}
setCapturingMouse(true);
// Kick off auto-repeat timer
if (m_mouseOver != Thumb)
m_autorepeatTimer.start(kAutorepeatInitialDelay,
kAutorepeatRepeatInterval);
m_needsLayout = true;
// FIXME: Invalidate only the portions that actually changed
invalidate();
return true;
}
void PlatformScrollbar::handleMouseMoveEventWhenCapturing(const PlatformMouseEvent& e)
{
IntPoint pos = convertFromContainingWindow(e.pos());
updateMousePosition(pos.x(), pos.y());
if (m_captureStart != Thumb) {
// FIXME: Invalidate only the portions that actually changed
invalidate();
return;
}
int xCancelDistance, yCancelDistance, backgroundSpan, thumbGirth, delta;
// NOTE: The cancel distance calculations are based on the behavior of the
// MSVC8 main window scrollbar + some guessing/extrapolation
if (orientation() == HorizontalScrollbar) {
xCancelDistance = kOffEndMultiplier * horizontalScrollbarHeight();
yCancelDistance = kOffSideMultiplier * horizontalScrollbarHeight();
backgroundSpan = m_segmentRects[AfterThumb].right() -
m_segmentRects[BeforeThumb].x();
thumbGirth = m_segmentRects[Thumb].right() - m_segmentRects[Thumb].x();
delta = pos.x() - m_dragOrigin.thumbPos;
} else {
xCancelDistance = kOffSideMultiplier * verticalScrollbarWidth();
yCancelDistance = kOffEndMultiplier * verticalScrollbarWidth();
backgroundSpan = m_segmentRects[AfterThumb].bottom() -
m_segmentRects[BeforeThumb].y();
thumbGirth = m_segmentRects[Thumb].bottom() - m_segmentRects[Thumb].y();
delta = pos.y() - m_dragOrigin.thumbPos;
}
// Snap scrollbar back to drag origin if mouse gets too far away
if ((m_lastNativePos.x() <
(m_segmentRects[BeforeThumb].x() - xCancelDistance)) ||
(m_lastNativePos.x() >
(m_segmentRects[AfterThumb].right() + xCancelDistance)) ||
(m_lastNativePos.y() <
(m_segmentRects[BeforeThumb].y() - yCancelDistance)) ||
(m_lastNativePos.y() >
(m_segmentRects[AfterThumb].bottom() + yCancelDistance)))
delta = 0;
// Convert delta from pixel coords to scrollbar logical coords
if (backgroundSpan > thumbGirth) {
if (setValue(m_dragOrigin.scrollVal + (delta *
(m_totalSize - m_visibleSize) / (backgroundSpan - thumbGirth)))) {
m_needsLayout = true;
// FIXME: Invalidate only the portions that actually changed
invalidate();
}
}
}
bool EventTargetNode::dispatchMouseEvent(const PlatformMouseEvent& _mouse, const AtomicString& eventType,
int detail, Node* relatedTarget)
{
assert(!eventDispatchForbidden());
IntPoint contentsPos;
if (FrameView* view = document()->view())
contentsPos = view->viewportToContents(_mouse.pos());
return dispatchMouseEvent(eventType, _mouse.button(), detail,
contentsPos.x(), contentsPos.y(), _mouse.globalX(), _mouse.globalY(),
_mouse.ctrlKey(), _mouse.altKey(), _mouse.shiftKey(), _mouse.metaKey(),
false, relatedTarget);
}
bool PlatformScrollbar::handleMouseReleaseEvent(const PlatformMouseEvent& e)
{
ScrollView* parentView = parent();
if (!parentView)
return true;
IntPoint pos = convertFromContainingWindow(e.pos());
updateMousePosition(pos.x(), pos.y());
setCapturingMouse(false);
// FIXME: Invalidate only the portions that actually changed
invalidate();
return true;
}
bool PlatformScrollbar::handleMouseMoveEvent(const PlatformMouseEvent& e)
{
if (!parent())
return true;
if (m_captureStart != None) {
handleMouseMoveEventWhenCapturing(e);
return true;
}
IntPoint pos = convertFromContainingWindow(e.pos());
updateMousePosition(pos.x(), pos.y());
// FIXME: Invalidate only the portions that actually changed
invalidate();
return true;
}
bool ScrollbarThemeWin::shouldSnapBackToDragOrigin(Scrollbar* scrollbar, const PlatformMouseEvent& evt)
{
// Find the rect within which we shouldn't snap, by expanding the track rect
// in both dimensions.
IntRect rect = trackRect(scrollbar);
const bool horz = scrollbar->orientation() == HorizontalScrollbar;
const int thickness = scrollbarThickness(scrollbar->controlSize());
rect.inflateX((horz ? kOffEndMultiplier : kOffSideMultiplier) * thickness);
rect.inflateY((horz ? kOffSideMultiplier : kOffEndMultiplier) * thickness);
// Convert the event to local coordinates.
IntPoint mousePosition = scrollbar->convertFromContainingWindow(evt.pos());
mousePosition.move(scrollbar->x(), scrollbar->y());
// We should snap iff the event is outside our calculated rect.
return !rect.contains(mousePosition);
}
bool EventTargetNode::dispatchMouseEvent(const PlatformMouseEvent& event, const AtomicString& eventType,
int detail, Node* relatedTarget)
{
ASSERT(!eventDispatchForbidden());
IntPoint contentsPos;
if (FrameView* view = document()->view())
contentsPos = view->windowToContents(event.pos());
short button = event.button();
ASSERT(event.eventType() == MouseEventMoved || button != NoButton);
return dispatchMouseEvent(eventType, button, detail,
contentsPos.x(), contentsPos.y(), event.globalX(), event.globalY(),
event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),
false, relatedTarget);
}
bool PlatformScrollbar::handleMouseReleaseEvent(const PlatformMouseEvent& evt)
{
const QPoint pos = convertFromContainingWindow(evt.pos());
const QPoint topLeft = m_opt.rect.topLeft();
m_opt.rect.moveTo(QPoint(0, 0));
QStyle::SubControl scAtMousePoint = QApplication::style()->hitTestComplexControl(QStyle::CC_ScrollBar, &m_opt, pos, 0);
m_opt.rect.moveTo(topLeft);
m_hoveredPart = scAtMousePoint;
if (m_hoveredPart == QStyle::SC_None)
m_opt.state &= ~QStyle::State_MouseOver;
m_opt.state &= ~QStyle::State_Sunken;
m_pressedPart = QStyle::SC_None;
m_pressedPos = 0;
stopTimerIfNeeded();
invalidate();
return true;
}
bool PlatformScrollbar::handleContextMenuEvent(const PlatformMouseEvent& event)
{
#ifndef QT_NO_CONTEXTMENU
bool horizontal = (m_orientation == HorizontalScrollbar);
QMenu menu;
QAction* actScrollHere = menu.addAction(tr("Scroll here"));
menu.addSeparator();
QAction* actScrollTop = menu.addAction(horizontal ? tr("Left edge") : tr("Top"));
QAction* actScrollBottom = menu.addAction(horizontal ? tr("Right edge") : tr("Bottom"));
menu.addSeparator();
QAction* actPageUp = menu.addAction(horizontal ? tr("Page left") : tr("Page up"));
QAction* actPageDown = menu.addAction(horizontal ? tr("Page right") : tr("Page down"));
menu.addSeparator();
QAction* actScrollUp = menu.addAction(horizontal ? tr("Scroll left") : tr("Scroll up"));
QAction* actScrollDown = menu.addAction(horizontal ? tr("Scroll right") : tr("Scroll down"));
const QPoint globalPos = QPoint(event.globalX(), event.globalY());
QAction* actionSelected = menu.exec(globalPos);
if (actionSelected == 0)
/* Do nothing */ ;
else if (actionSelected == actScrollHere) {
const QPoint pos = convertFromContainingWindow(event.pos());
setValue(pixelPosToRangeValue(horizontal ? pos.x() : pos.y()));
} else if (actionSelected == actScrollTop)
setValue(0);
else if (actionSelected == actScrollBottom)
setValue(m_totalSize - m_visibleSize);
else if (actionSelected == actPageUp)
scroll(horizontal ? ScrollLeft: ScrollUp, ScrollByPage, 1);
else if (actionSelected == actPageDown)
scroll(horizontal ? ScrollRight : ScrollDown, ScrollByPage, 1);
else if (actionSelected == actScrollUp)
scroll(horizontal ? ScrollLeft : ScrollUp, ScrollByLine, 1);
else if (actionSelected == actScrollDown)
scroll(horizontal ? ScrollRight : ScrollDown, ScrollByLine, 1);
#endif // QT_NO_CONTEXTMENU
return true;
}
bool PlatformScrollbar::handleMousePressEvent(const PlatformMouseEvent& evt)
{
// Early exit for right click
if (evt.button() == RightButton)
return true; // Handled as context menu
const QPoint pos = convertFromContainingWindow(evt.pos());
bool midButtonAbsPos = QApplication::style()->styleHint(QStyle::SH_ScrollBar_MiddleClickAbsolutePosition);
// Middle click centers slider thumb, if supported
if (midButtonAbsPos && evt.button() == MiddleButton) {
setValue(pixelPosToRangeValue((m_orientation == HorizontalScrollbar ?
pos.x() : pos.y()) - thumbLength() / 2));
} else { // Left button, or if middle click centering is not supported
const QPoint topLeft = m_opt.rect.topLeft();
m_opt.rect.moveTo(QPoint(0, 0));
QStyle::SubControl sc = QApplication::style()->hitTestComplexControl(QStyle::CC_ScrollBar, &m_opt, pos, 0);
m_opt.rect.moveTo(topLeft);
switch (sc) {
case QStyle::SC_ScrollBarAddLine:
case QStyle::SC_ScrollBarSubLine:
case QStyle::SC_ScrollBarSlider:
m_opt.state |= QStyle::State_Sunken;
case QStyle::SC_ScrollBarAddPage:
case QStyle::SC_ScrollBarSubPage:
case QStyle::SC_ScrollBarGroove:
m_pressedPart = sc;
break;
default:
m_pressedPart = QStyle::SC_None;
return false;
}
m_pressedPos = m_orientation == HorizontalScrollbar ? pos.x() : pos.y();
autoscrollPressedPart(cInitialTimerDelay);
invalidate();
}
return true;
}
ScrollbarPart ScrollbarThemeComposite::hitTest(Scrollbar* scrollbar, const PlatformMouseEvent& evt)
{
ScrollbarPart result = NoPart;
if (!scrollbar->enabled())
return result;
IntPoint mousePosition = scrollbar->convertFromContainingWindow(evt.pos());
mousePosition.move(scrollbar->x(), scrollbar->y());
if (!scrollbar->frameRect().contains(mousePosition))
return NoPart;
result = ScrollbarBGPart;
IntRect track = trackRect(scrollbar);
if (track.contains(mousePosition)) {
IntRect beforeThumbRect;
IntRect thumbRect;
IntRect afterThumbRect;
splitTrack(scrollbar, track, beforeThumbRect, thumbRect, afterThumbRect);
if (thumbRect.contains(mousePosition))
result = ThumbPart;
else if (beforeThumbRect.contains(mousePosition))
result = BackTrackPart;
else if (afterThumbRect.contains(mousePosition))
result = ForwardTrackPart;
else
result = TrackBGPart;
} else if (backButtonRect(scrollbar, BackButtonStartPart).contains(mousePosition))
result = BackButtonStartPart;
else if (backButtonRect(scrollbar, BackButtonEndPart).contains(mousePosition))
result = BackButtonEndPart;
else if (forwardButtonRect(scrollbar, ForwardButtonStartPart).contains(mousePosition))
result = ForwardButtonStartPart;
else if (forwardButtonRect(scrollbar, ForwardButtonEndPart).contains(mousePosition))
result = ForwardButtonEndPart;
return result;
}
bool Scrollbar::mouseMoved(const PlatformMouseEvent& evt)
{
if (m_pressedPart == ThumbPart) {
if (theme()->shouldSnapBackToDragOrigin(this, evt)) {
if (m_scrollableArea)
m_scrollableArea->scrollToOffsetWithoutAnimation(m_orientation, m_dragOrigin);
} else {
moveThumb(m_orientation == HorizontalScrollbar ?
convertFromContainingWindow(evt.pos()).x() :
convertFromContainingWindow(evt.pos()).y(), theme()->shouldDragDocumentInsteadOfThumb(this, evt));
}
return true;
}
if (m_pressedPart != NoPart)
m_pressedPos = (orientation() == HorizontalScrollbar ? convertFromContainingWindow(evt.pos()).x() : convertFromContainingWindow(evt.pos()).y());
ScrollbarPart part = theme()->hitTest(this, evt);
if (part != m_hoveredPart) {
if (m_pressedPart != NoPart) {
if (part == m_pressedPart) {
// The mouse is moving back over the pressed part. We
// need to start up the timer action again.
startTimerIfNeeded(theme()->autoscrollTimerDelay());
theme()->invalidatePart(this, m_pressedPart);
} else if (m_hoveredPart == m_pressedPart) {
// The mouse is leaving the pressed part. Kill our timer
// if needed.
stopTimerIfNeeded();
theme()->invalidatePart(this, m_pressedPart);
}
}
setHoveredPart(part);
}
return true;
}
bool DragController::startDrag(Frame* src, Clipboard* clipboard, DragOperation srcOp, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin, bool isDHTMLDrag)
#endif
{
ASSERT(src);
ASSERT(clipboard);
if (!src->view() || !src->renderer())
return false;
HitTestResult dragSource = HitTestResult(dragOrigin);
dragSource = src->eventHandler()->hitTestResultAtPoint(dragOrigin, true);
KURL linkURL = dragSource.absoluteLinkURL();
KURL imageURL = dragSource.absoluteImageURL();
bool isSelected = dragSource.isSelected();
IntPoint mouseDraggedPoint = src->view()->windowToContents(dragEvent.pos());
m_draggingImageURL = KURL();
m_dragOperation = srcOp;
DragImageRef dragImage = 0;
IntPoint dragLoc(0, 0);
IntPoint dragImageOffset(0, 0);
if (isDHTMLDrag)
dragImage = clipboard->createDragImage(dragImageOffset);
// We allow DHTML/JS to set the drag image, even if its a link, image or text we're dragging.
// This is in the spirit of the IE API, which allows overriding of pasteboard data and DragOp.
if (dragImage) {
dragLoc = dragLocForDHTMLDrag(mouseDraggedPoint, dragOrigin, dragImageOffset, !linkURL.isEmpty());
m_dragOffset = dragImageOffset;
}
bool startedDrag = true; // optimism - we almost always manage to start the drag
Node* node = dragSource.innerNonSharedNode();
if (!imageURL.isEmpty() && node && node->isElementNode()
&& getImage(static_cast<Element*>(node))
&& (m_dragSourceAction & DragSourceActionImage)) {
Element* element = static_cast<Element*>(node);
if (!clipboard->hasData()) {
m_draggingImageURL = imageURL;
prepareClipboardForImageDrag(src, clipboard, element, linkURL, imageURL, dragSource.altDisplayString());
}
m_client->willPerformDragSourceAction(DragSourceActionImage, dragOrigin, clipboard);
if (!dragImage) {
IntRect imageRect = dragSource.imageRect();
imageRect.setLocation(m_page->mainFrame()->view()->windowToContents(src->view()->contentsToWindow(imageRect.location())));
doImageDrag(element, dragOrigin, dragSource.imageRect(), clipboard, src, m_dragOffset);
} else
// DHTML defined drag image
doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false);
} else if (!linkURL.isEmpty() && (m_dragSourceAction & DragSourceActionLink)) {
if (!clipboard->hasData())
// Simplify whitespace so the title put on the clipboard resembles what the user sees
// on the web page. This includes replacing newlines with spaces.
clipboard->writeURL(linkURL, dragSource.textContent().simplifyWhiteSpace(), src);
m_client->willPerformDragSourceAction(DragSourceActionLink, dragOrigin, clipboard);
if (!dragImage) {
dragImage = m_client->createDragImageForLink(linkURL, dragSource.textContent(), src);
IntSize size = dragImageSize(dragImage);
m_dragOffset = IntPoint(-size.width() / 2, -LinkDragBorderInset);
dragLoc = IntPoint(mouseDraggedPoint.x() + m_dragOffset.x(), mouseDraggedPoint.y() + m_dragOffset.y());
}
doSystemDrag(dragImage, dragLoc, mouseDraggedPoint, clipboard, src, true);
} else if (isSelected && (m_dragSourceAction & DragSourceActionSelection)) {
RefPtr<Range> selectionRange = src->selectionController()->toRange();
ASSERT(selectionRange);
if (!clipboard->hasData())
clipboard->writeRange(selectionRange.get(), src);
m_client->willPerformDragSourceAction(DragSourceActionSelection, dragOrigin, clipboard);
if (!dragImage) {
dragImage = createDragImageForSelection(src);
dragLoc = dragLocForSelectionDrag(src);
m_dragOffset = IntPoint((int)(dragOrigin.x() - dragLoc.x()), (int)(dragOrigin.y() - dragLoc.y()));
}
doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false);
} else if (isDHTMLDrag) {
ASSERT(m_dragSourceAction & DragSourceActionDHTML);
m_client->willPerformDragSourceAction(DragSourceActionDHTML, dragOrigin, clipboard);
doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false);
} else {
// Only way I know to get here is if to get here is if the original element clicked on in the mousedown is no longer
// under the mousedown point, so linkURL, imageURL and isSelected are all false/empty.
startedDrag = false;
}
if (dragImage)
deleteDragImage(dragImage);
return startedDrag;
}
bool PlatformScrollbar::handleMousePressEvent(const PlatformMouseEvent& evt)
{
m_pressedPart = hitTest(evt);
m_pressedPos = (m_orientation == HorizontalScrollbar ? convertFromContainingWindow(evt.pos()).x() : convertFromContainingWindow(evt.pos()).y());
invalidatePart(m_pressedPart);
autoscrollPressedPart(cInitialTimerDelay);
return true;
}
bool PlatformScrollbar::handleMouseMoveEvent(const PlatformMouseEvent& evt)
{
if (m_pressedPart == ThumbPart)
{
// Drag the thumb.
int thumbPos = thumbPosition();
int thumbLen = thumbLength();
int trackLen = trackLength();
int maxPos = trackLen - thumbLen;
int delta = 0;
if (m_orientation == HorizontalScrollbar)
delta = convertFromContainingWindow(evt.pos()).x() - m_pressedPos;
else
delta = convertFromContainingWindow(evt.pos()).y() - m_pressedPos;
if (delta > 0)
// The mouse moved down/right.
delta = min(maxPos - thumbPos, delta);
else if (delta < 0)
// The mouse moved up/left.
delta = max(-thumbPos, delta);
if (delta != 0)
{
setValue(static_cast<int>((float)(thumbPos + delta) * (m_totalSize - m_visibleSize) / (trackLen - thumbLen)));
m_pressedPos += thumbPosition() - thumbPos;
}
return true;
}
if (m_pressedPart != NoPart)
m_pressedPos = (m_orientation == HorizontalScrollbar ? convertFromContainingWindow(evt.pos()).x() : convertFromContainingWindow(evt.pos()).y());
ScrollbarPart part = hitTest(evt);
if (part != m_hoveredPart)
{
if (m_pressedPart != NoPart)
{
if (part == m_pressedPart)
{
// The mouse is moving back over the pressed part. We
// need to start up the timer action again.
startTimerIfNeeded(cNormalTimerDelay);
invalidatePart(m_pressedPart);
} else if (m_hoveredPart == m_pressedPart)
{
// The mouse is leaving the pressed part. Kill our timer
// if needed.
stopTimerIfNeeded();
invalidatePart(m_pressedPart);
}
}
else
{
invalidatePart(part);
invalidatePart(m_hoveredPart);
}
m_hoveredPart = part;
}
updateViewOnMouseHover();
return true;
}
bool PlatformScrollbar::handleMouseMoveEvent(const PlatformMouseEvent& evt)
{
const QPoint pos = convertFromContainingWindow(evt.pos());
//qDebug() << "PlatformScrollbar::handleMouseMoveEvent" << m_opt.rect << pos << evt.pos();
m_opt.state |= QStyle::State_MouseOver;
const QPoint topLeft = m_opt.rect.topLeft();
m_opt.rect.moveTo(QPoint(0, 0));
QStyle::SubControl sc = QApplication::style()->hitTestComplexControl(QStyle::CC_ScrollBar, &m_opt, pos, 0);
m_opt.rect.moveTo(topLeft);
if (m_pressedPart == QStyle::SC_ScrollBarSlider) {
// Drag the thumb.
int thumbPos = thumbPosition();
int thumbLen = thumbLength();
int trackLen = trackLength();
int maxPos = trackLen - thumbLen;
int delta = 0;
if (m_orientation == HorizontalScrollbar)
delta = pos.x() - m_pressedPos;
else
delta = pos.y() - m_pressedPos;
if (delta > 0)
// The mouse moved down/right.
delta = min(maxPos - thumbPos, delta);
else if (delta < 0)
// The mouse moved up/left.
delta = max(-thumbPos, delta);
if (delta != 0) {
setValue((int)((float)(thumbPos + delta) * (m_totalSize - m_visibleSize) / (trackLen - thumbLen)));
m_pressedPos += thumbPosition() - thumbPos;
}
return true;
}
if (m_pressedPart != QStyle::SC_None)
m_pressedPos = m_orientation == HorizontalScrollbar ? pos.x() : pos.y();
if (sc != m_hoveredPart) {
if (m_pressedPart != QStyle::SC_None) {
if (sc == m_pressedPart) {
// The mouse is moving back over the pressed part. We
// need to start up the timer action again.
startTimerIfNeeded(cNormalTimerDelay);
invalidate();
} else if (m_hoveredPart == m_pressedPart) {
// The mouse is leaving the pressed part. Kill our timer
// if needed.
stopTimerIfNeeded();
invalidate();
}
} else {
invalidate();
}
m_hoveredPart = sc;
}
return true;
}
bool Scrollbar::mouseDown(const PlatformMouseEvent& evt)
{
// Early exit for right click
if (evt.button() == RightButton)
return true; // FIXME: Handled as context menu by Qt right now. Should just avoid even calling this method on a right click though.
setPressedPart(theme()->hitTest(this, evt));
int pressedPos = (orientation() == HorizontalScrollbar ? convertFromContainingWindow(evt.pos()).x() : convertFromContainingWindow(evt.pos()).y());
if ((m_pressedPart == BackTrackPart || m_pressedPart == ForwardTrackPart) && theme()->shouldCenterOnThumb(this, evt)) {
setHoveredPart(ThumbPart);
setPressedPart(ThumbPart);
m_dragOrigin = m_currentPos;
int thumbLen = theme()->thumbLength(this);
int desiredPos = pressedPos;
// Set the pressed position to the middle of the thumb so that when we do the move, the delta
// will be from the current pixel position of the thumb to the new desired position for the thumb.
m_pressedPos = theme()->trackPosition(this) + theme()->thumbPosition(this) + thumbLen / 2;
moveThumb(desiredPos);
return true;
} else if (m_pressedPart == ThumbPart)
m_dragOrigin = m_currentPos;
m_pressedPos = pressedPos;
autoscrollPressedPart(theme()->initialAutoscrollTimerDelay());
return true;
}
bool DragController::startDrag(Frame* src, Clipboard* clipboard, DragOperation srcOp, const PlatformMouseEvent& dragEvent, const IntPoint& dragOrigin, bool isDHTMLDrag)
{
ASSERT(src);
ASSERT(clipboard);
if (!src->view() || !src->contentRenderer())
return false;
HitTestResult dragSource = HitTestResult(dragOrigin);
dragSource = src->eventHandler()->hitTestResultAtPoint(dragOrigin, true);
KURL linkURL = dragSource.absoluteLinkURL();
KURL imageURL = dragSource.absoluteImageURL();
bool isSelected = dragSource.isSelected();
IntPoint mouseDraggedPoint = src->view()->windowToContents(dragEvent.pos());
m_draggingImageURL = KURL();
m_sourceDragOperation = srcOp;
DragImageRef dragImage = 0;
IntPoint dragLoc(0, 0);
IntPoint dragImageOffset(0, 0);
if (isDHTMLDrag)
dragImage = clipboard->createDragImage(dragImageOffset);
else {
// This drag operation is not a DHTML drag and may go outside the WebView.
// We provide a default set of allowed drag operations that follows from:
// http://trac.webkit.org/browser/trunk/WebKit/mac/WebView/WebHTMLView.mm?rev=48526#L3430
m_sourceDragOperation = (DragOperation)(DragOperationGeneric | DragOperationCopy);
}
// We allow DHTML/JS to set the drag image, even if its a link, image or text we're dragging.
// This is in the spirit of the IE API, which allows overriding of pasteboard data and DragOp.
if (dragImage) {
dragLoc = dragLocForDHTMLDrag(mouseDraggedPoint, dragOrigin, dragImageOffset, !linkURL.isEmpty());
m_dragOffset = dragImageOffset;
}
bool startedDrag = true; // optimism - we almost always manage to start the drag
Node* node = dragSource.innerNonSharedNode();
Image* image = getImage(static_cast<Element*>(node));
if (!imageURL.isEmpty() && node && node->isElementNode() && image
&& (m_dragSourceAction & DragSourceActionImage)) {
// We shouldn't be starting a drag for an image that can't provide an extension.
// This is an early detection for problems encountered later upon drop.
ASSERT(!image->filenameExtension().isEmpty());
Element* element = static_cast<Element*>(node);
if (!clipboard->hasData()) {
m_draggingImageURL = imageURL;
prepareClipboardForImageDrag(src, clipboard, element, linkURL, imageURL, dragSource.altDisplayString());
}
m_client->willPerformDragSourceAction(DragSourceActionImage, dragOrigin, clipboard);
if (!dragImage) {
IntRect imageRect = dragSource.imageRect();
imageRect.setLocation(m_page->mainFrame()->view()->windowToContents(src->view()->contentsToWindow(imageRect.location())));
doImageDrag(element, dragOrigin, dragSource.imageRect(), clipboard, src, m_dragOffset);
} else
// DHTML defined drag image
doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false);
} else if (!linkURL.isEmpty() && (m_dragSourceAction & DragSourceActionLink)) {
if (!clipboard->hasData())
// Simplify whitespace so the title put on the clipboard resembles what the user sees
// on the web page. This includes replacing newlines with spaces.
clipboard->writeURL(linkURL, dragSource.textContent().simplifyWhiteSpace(), src);
if (src->selection()->isCaret() && src->selection()->isContentEditable()) {
// a user can initiate a drag on a link without having any text
// selected. In this case, we should expand the selection to
// the enclosing anchor element
Position pos = src->selection()->base();
Node* node = enclosingAnchorElement(pos);
if (node)
src->selection()->setSelection(VisibleSelection::selectionFromContentsOfNode(node));
}
m_client->willPerformDragSourceAction(DragSourceActionLink, dragOrigin, clipboard);
if (!dragImage) {
dragImage = m_client->createDragImageForLink(linkURL, dragSource.textContent(), src);
IntSize size = dragImageSize(dragImage);
m_dragOffset = IntPoint(-size.width() / 2, -LinkDragBorderInset);
dragLoc = IntPoint(mouseDraggedPoint.x() + m_dragOffset.x(), mouseDraggedPoint.y() + m_dragOffset.y());
}
doSystemDrag(dragImage, dragLoc, mouseDraggedPoint, clipboard, src, true);
} else if (isSelected && (m_dragSourceAction & DragSourceActionSelection)) {
RefPtr<Range> selectionRange = src->selection()->toNormalizedRange();
ASSERT(selectionRange);
if (!clipboard->hasData())
clipboard->writeRange(selectionRange.get(), src);
m_client->willPerformDragSourceAction(DragSourceActionSelection, dragOrigin, clipboard);
if (!dragImage) {
dragImage = createDragImageForSelection(src);
dragLoc = dragLocForSelectionDrag(src);
m_dragOffset = IntPoint((int)(dragOrigin.x() - dragLoc.x()), (int)(dragOrigin.y() - dragLoc.y()));
}
doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false);
} else if (isDHTMLDrag) {
ASSERT(m_dragSourceAction & DragSourceActionDHTML);
m_client->willPerformDragSourceAction(DragSourceActionDHTML, dragOrigin, clipboard);
doSystemDrag(dragImage, dragLoc, dragOrigin, clipboard, src, false);
} else {
// Only way I know to get here is if to get here is if the original element clicked on in the mousedown is no longer
// under the mousedown point, so linkURL, imageURL and isSelected are all false/empty.
startedDrag = false;
}
if (dragImage)
deleteDragImage(dragImage);
return startedDrag;
}