nsresult
HTMLLabelElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
{
WidgetMouseEvent* mouseEvent = aVisitor.mEvent->AsMouseEvent();
if (mHandlingEvent ||
(!(mouseEvent && mouseEvent->IsLeftClickEvent()) &&
aVisitor.mEvent->mMessage != eMouseDown) ||
aVisitor.mEventStatus == nsEventStatus_eConsumeNoDefault ||
!aVisitor.mPresContext ||
// Don't handle the event if it's already been handled by another label
aVisitor.mEvent->mFlags.mMultipleActionsPrevented) {
return NS_OK;
}
nsCOMPtr<nsIContent> target = do_QueryInterface(aVisitor.mEvent->target);
if (InInteractiveHTMLContent(target, this)) {
return NS_OK;
}
// Strong ref because event dispatch is going to happen.
RefPtr<Element> content = GetLabeledElement();
if (content) {
mHandlingEvent = true;
switch (aVisitor.mEvent->mMessage) {
case eMouseDown:
if (mouseEvent->button == WidgetMouseEvent::eLeftButton) {
// We reset the mouse-down point on every event because there is
// no guarantee we will reach the eMouseClick code below.
LayoutDeviceIntPoint* curPoint =
new LayoutDeviceIntPoint(mouseEvent->refPoint);
SetProperty(nsGkAtoms::labelMouseDownPtProperty,
static_cast<void*>(curPoint),
nsINode::DeleteProperty<LayoutDeviceIntPoint>);
}
break;
case eMouseClick:
if (mouseEvent->IsLeftClickEvent()) {
LayoutDeviceIntPoint* mouseDownPoint =
static_cast<LayoutDeviceIntPoint*>(
GetProperty(nsGkAtoms::labelMouseDownPtProperty));
bool dragSelect = false;
if (mouseDownPoint) {
LayoutDeviceIntPoint dragDistance = *mouseDownPoint;
DeleteProperty(nsGkAtoms::labelMouseDownPtProperty);
dragDistance -= mouseEvent->refPoint;
const int CLICK_DISTANCE = 2;
dragSelect = dragDistance.x > CLICK_DISTANCE ||
dragDistance.x < -CLICK_DISTANCE ||
dragDistance.y > CLICK_DISTANCE ||
dragDistance.y < -CLICK_DISTANCE;
}
// Don't click the for-content if we did drag-select text or if we
// have a kbd modifier (which adjusts a selection).
if (dragSelect || mouseEvent->IsShift() || mouseEvent->IsControl() ||
mouseEvent->IsAlt() || mouseEvent->IsMeta()) {
break;
}
// Only set focus on the first click of multiple clicks to prevent
// to prevent immediate de-focus.
if (mouseEvent->clickCount <= 1) {
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm) {
// Use FLAG_BYMOVEFOCUS here so that the label is scrolled to.
// Also, within HTMLInputElement::PostHandleEvent, inputs will
// be selected only when focused via a key or when the navigation
// flag is used and we want to select the text on label clicks as
// well.
// If the label has been clicked by the user, we also want to
// pass FLAG_BYMOUSE so that we get correct focus ring behavior,
// but we don't want to pass FLAG_BYMOUSE if this click event was
// caused by the user pressing an accesskey.
nsCOMPtr<nsIDOMElement> elem = do_QueryInterface(content);
bool byMouse = (mouseEvent->inputSource != nsIDOMMouseEvent::MOZ_SOURCE_KEYBOARD);
bool byTouch = (mouseEvent->inputSource == nsIDOMMouseEvent::MOZ_SOURCE_TOUCH);
fm->SetFocus(elem, nsIFocusManager::FLAG_BYMOVEFOCUS |
(byMouse ? nsIFocusManager::FLAG_BYMOUSE : 0) |
(byTouch ? nsIFocusManager::FLAG_BYTOUCH : 0));
}
}
// Dispatch a new click event to |content|
// (For compatibility with IE, we do only left click. If
// we wanted to interpret the HTML spec very narrowly, we
// would do nothing. If we wanted to do something
// sensible, we might send more events through like
// this.) See bug 7554, bug 49897, and bug 96813.
nsEventStatus status = aVisitor.mEventStatus;
// Ok to use aVisitor.mEvent as parameter because DispatchClickEvent
// will actually create a new event.
EventFlags eventFlags;
eventFlags.mMultipleActionsPrevented = true;
DispatchClickEvent(aVisitor.mPresContext, mouseEvent,
content, false, &eventFlags, &status);
// Do we care about the status this returned? I don't think we do...
// Don't run another <label> off of this click
mouseEvent->mFlags.mMultipleActionsPrevented = true;
}
break;
default:
break;
}
mHandlingEvent = false;
}
return NS_OK;
}
nsresult
HTMLLabelElement::PostHandleEvent(nsEventChainPostVisitor& aVisitor)
{
if (mHandlingEvent ||
(!NS_IS_MOUSE_LEFT_CLICK(aVisitor.mEvent) &&
aVisitor.mEvent->message != NS_MOUSE_BUTTON_DOWN) ||
aVisitor.mEventStatus == nsEventStatus_eConsumeNoDefault ||
!aVisitor.mPresContext ||
// Don't handle the event if it's already been handled by another label
aVisitor.mEvent->mFlags.mMultipleActionsPrevented) {
return NS_OK;
}
// Strong ref because event dispatch is going to happen.
nsRefPtr<Element> content = GetLabeledElement();
if (content && !EventTargetIn(aVisitor.mEvent, content, this)) {
mHandlingEvent = true;
switch (aVisitor.mEvent->message) {
case NS_MOUSE_BUTTON_DOWN:
NS_ASSERTION(aVisitor.mEvent->eventStructType == NS_MOUSE_EVENT,
"wrong event struct for event");
if (static_cast<nsMouseEvent*>(aVisitor.mEvent)->button ==
nsMouseEvent::eLeftButton) {
// We reset the mouse-down point on every event because there is
// no guarantee we will reach the NS_MOUSE_CLICK code below.
nsIntPoint *curPoint = new nsIntPoint(aVisitor.mEvent->refPoint);
SetProperty(nsGkAtoms::labelMouseDownPtProperty,
static_cast<void *>(curPoint),
DestroyMouseDownPoint);
}
break;
case NS_MOUSE_CLICK:
if (NS_IS_MOUSE_LEFT_CLICK(aVisitor.mEvent)) {
const nsMouseEvent* event =
static_cast<const nsMouseEvent*>(aVisitor.mEvent);
nsIntPoint *mouseDownPoint = static_cast<nsIntPoint *>
(GetProperty(nsGkAtoms::labelMouseDownPtProperty));
bool dragSelect = false;
if (mouseDownPoint) {
nsIntPoint dragDistance = *mouseDownPoint;
DeleteProperty(nsGkAtoms::labelMouseDownPtProperty);
dragDistance -= aVisitor.mEvent->refPoint;
const int CLICK_DISTANCE = 2;
dragSelect = dragDistance.x > CLICK_DISTANCE ||
dragDistance.x < -CLICK_DISTANCE ||
dragDistance.y > CLICK_DISTANCE ||
dragDistance.y < -CLICK_DISTANCE;
}
// Don't click the for-content if we did drag-select text or if we
// have a kbd modifier (which adjusts a selection), or if it's a
// double click (we already forwarded the first click event).
if (dragSelect || event->clickCount > 1 ||
event->IsShift() || event->IsControl() || event->IsAlt() ||
event->IsMeta()) {
break;
}
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm) {
// Use FLAG_BYMOVEFOCUS here so that the label is scrolled to.
// Also, within nsHTMLInputElement::PostHandleEvent, inputs will
// be selected only when focused via a key or when the navigation
// flag is used and we want to select the text on label clicks as
// well.
nsCOMPtr<nsIDOMElement> elem = do_QueryInterface(content);
fm->SetFocus(elem, nsIFocusManager::FLAG_BYMOVEFOCUS);
}
// Dispatch a new click event to |content|
// (For compatibility with IE, we do only left click. If
// we wanted to interpret the HTML spec very narrowly, we
// would do nothing. If we wanted to do something
// sensible, we might send more events through like
// this.) See bug 7554, bug 49897, and bug 96813.
nsEventStatus status = aVisitor.mEventStatus;
// Ok to use aVisitor.mEvent as parameter because DispatchClickEvent
// will actually create a new event.
widget::EventFlags eventFlags;
eventFlags.Clear();
eventFlags.mMultipleActionsPrevented = true;
DispatchClickEvent(aVisitor.mPresContext,
static_cast<nsInputEvent*>(aVisitor.mEvent),
content, false, &eventFlags, &status);
// Do we care about the status this returned? I don't think we do...
// Don't run another <label> off of this click
aVisitor.mEvent->mFlags.mMultipleActionsPrevented = true;
}
break;
}
mHandlingEvent = false;
}
return NS_OK;
}
