bool DragController::tryDocumentDrag(DragData* dragData, DragDestinationAction actionMask, DragOperation& operation)
{
ASSERT(dragData);
if (!m_documentUnderMouse)
return false;
m_isHandlingDrag = false;
if (actionMask & DragDestinationActionDHTML) {
m_isHandlingDrag = tryDHTMLDrag(dragData, operation);
// Do not continue if m_documentUnderMouse has been reset by tryDHTMLDrag.
// tryDHTMLDrag fires dragenter event. The event listener that listens
// to this event may create a nested message loop (open a modal dialog),
// which could process dragleave event and reset m_documentUnderMouse in
// dragExited.
if (!m_documentUnderMouse)
return false;
}
// It's unclear why this check is after tryDHTMLDrag.
// We send drag events in tryDHTMLDrag and that may be the reason.
RefPtr<FrameView> frameView = m_documentUnderMouse->view();
if (!frameView)
return false;
if (m_isHandlingDrag) {
m_page->dragCaretController()->clear();
return true;
} else if ((actionMask & DragDestinationActionEdit) && canProcessDrag(dragData)) {
if (dragData->containsColor()) {
operation = DragOperationGeneric;
return true;
}
IntPoint point = frameView->windowToContents(dragData->clientPosition());
Element* element = elementUnderMouse(m_documentUnderMouse, point);
if (!asFileInput(element)) {
VisibleSelection dragCaret = m_documentUnderMouse->frame()->visiblePositionForPoint(point);
m_page->dragCaretController()->setSelection(dragCaret);
}
Frame* innerFrame = element->document()->frame();
operation = dragIsMove(innerFrame->selection()) ? DragOperationMove : DragOperationCopy;
return true;
}
// If we're not over an editable region, make sure we're clearing any prior drag cursor.
m_page->dragCaretController()->clear();
return false;
}
DragOperation DragController::tryDocumentDrag(DragData* dragData, DragDestinationAction actionMask)
{
ASSERT(dragData);
if (!m_document)
return DragOperationNone;
DragOperation operation = DragOperationNone;
if (actionMask & DragDestinationActionDHTML)
operation = tryDHTMLDrag(dragData);
m_isHandlingDrag = operation != DragOperationNone;
RefPtr<FrameView> frameView = m_document->view();
if (!frameView)
return operation;
if ((actionMask & DragDestinationActionEdit) && !m_isHandlingDrag && canProcessDrag(dragData)) {
if (dragData->containsColor())
return DragOperationGeneric;
IntPoint dragPos = dragData->clientPosition();
IntPoint point = frameView->windowToContents(dragPos);
Element* element = m_document->elementFromPoint(point.x(), point.y());
ASSERT(element);
Frame* innerFrame = element->document()->frame();
ASSERT(innerFrame);
if (!asFileInput(element)) {
Selection dragCaret;
if (Frame* frame = m_document->frame())
dragCaret = frame->visiblePositionForPoint(point);
m_page->dragCaretController()->setSelection(dragCaret);
}
return dragIsMove(innerFrame->selection()) ? DragOperationMove : DragOperationCopy;
}
m_page->dragCaretController()->clear();
return operation;
}
bool DragController::tryDocumentDrag(DragData* dragData, DragDestinationAction actionMask, DragSession& dragSession)
{
ASSERT(dragData);
if (!m_documentUnderMouse)
return false;
if (m_dragInitiator && !m_documentUnderMouse->securityOrigin()->canReceiveDragData(m_dragInitiator->securityOrigin()))
return false;
m_isHandlingDrag = false;
if (actionMask & DragDestinationActionDHTML) {
m_isHandlingDrag = tryDHTMLDrag(dragData, dragSession.operation);
// Do not continue if m_documentUnderMouse has been reset by tryDHTMLDrag.
// tryDHTMLDrag fires dragenter event. The event listener that listens
// to this event may create a nested message loop (open a modal dialog),
// which could process dragleave event and reset m_documentUnderMouse in
// dragExited.
if (!m_documentUnderMouse)
return false;
}
// It's unclear why this check is after tryDHTMLDrag.
// We send drag events in tryDHTMLDrag and that may be the reason.
RefPtr<FrameView> frameView = m_documentUnderMouse->view();
if (!frameView)
return false;
if (m_isHandlingDrag) {
m_page->dragCaretController()->clear();
return true;
} else if ((actionMask & DragDestinationActionEdit) && canProcessDrag(dragData)) {
if (dragData->containsColor()) {
dragSession.operation = DragOperationGeneric;
return true;
}
IntPoint point = frameView->windowToContents(dragData->clientPosition());
Element* element = elementUnderMouse(m_documentUnderMouse.get(), point);
if (!element)
return false;
HTMLInputElement* elementAsFileInput = asFileInput(element);
if (m_fileInputElementUnderMouse != elementAsFileInput) {
if (m_fileInputElementUnderMouse)
m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false);
m_fileInputElementUnderMouse = elementAsFileInput;
}
if (!m_fileInputElementUnderMouse)
m_page->dragCaretController()->setCaretPosition(m_documentUnderMouse->frame()->visiblePositionForPoint(point));
Frame* innerFrame = element->document()->frame();
dragSession.operation = dragIsMove(innerFrame->selection(), dragData) ? DragOperationMove : DragOperationCopy;
dragSession.mouseIsOverFileInput = m_fileInputElementUnderMouse;
dragSession.numberOfItemsToBeAccepted = 0;
unsigned numberOfFiles = dragData->numberOfFiles();
if (m_fileInputElementUnderMouse) {
if (m_fileInputElementUnderMouse->disabled())
dragSession.numberOfItemsToBeAccepted = 0;
else if (m_fileInputElementUnderMouse->multiple())
dragSession.numberOfItemsToBeAccepted = numberOfFiles;
else if (numberOfFiles > 1)
dragSession.numberOfItemsToBeAccepted = 0;
else
dragSession.numberOfItemsToBeAccepted = 1;
if (!dragSession.numberOfItemsToBeAccepted)
dragSession.operation = DragOperationNone;
m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(dragSession.numberOfItemsToBeAccepted);
} else {
// We are not over a file input element. The dragged item(s) will only
// be loaded into the view the number of dragged items is 1.
dragSession.numberOfItemsToBeAccepted = numberOfFiles != 1 ? 0 : 1;
}
return true;
}
// We are not over an editable region. Make sure we're clearing any prior drag cursor.
m_page->dragCaretController()->clear();
if (m_fileInputElementUnderMouse)
m_fileInputElementUnderMouse->setCanReceiveDroppedFiles(false);
m_fileInputElementUnderMouse = 0;
return false;
}
