STDMETHODIMP CDropTarget::DragOver(DWORD grfKeyState, POINTL pt, LPDWORD pdwEffect)
{
#if 0
LPITEMIDLIST pidl = (LPITEMIDLIST)SendMessage(m_hwnd, BB_DRAGOVER, grfKeyState, (LPARAM)&pt);
// -----------------------------------------------------------
// if this is enabled, things are dropped to menu items
// rather than to the menu's folder itself
int s1 = pidl ? GetIDListSize(pidl) : 0;
int s2 = m_pidl ? GetIDListSize(m_pidl) : 0;
if (s1 != s2 || (s1 && memcmp(pidl, m_pidl, s1)))
{
AddRef();
DragLeave();
if (m_pidl) m_free(m_pidl);
m_pidl = duplicateIDlist(pidl);
DWORD dwEffect = *pdwEffect;
DragEnter(m_pDataObject, grfKeyState, pt, &dwEffect);
Release();
}
// -----------------------------------------------------------
#else
SendMessage(m_hwnd, BB_DRAGOVER, grfKeyState, (LPARAM)&pt);
#endif
// if we have a valid target object, relay the call
if(m_pDropTarget)
{
// mouse pointer information is not really relevant to the shell item...
return m_pDropTarget->DragOver(grfKeyState, pt, pdwEffect);
}
else
{
*pdwEffect = DROPEFFECT_NONE; // can't accept now
return S_OK;
}
}
NS_IMETHODIMP
EditorEventListener::HandleEvent(nsIDOMEvent* aEvent)
{
NS_ENSURE_TRUE(mEditorBase, NS_ERROR_FAILURE);
nsCOMPtr<nsIEditor> kungFuDeathGrip = mEditorBase;
Unused << kungFuDeathGrip; // mEditorBase is not referred to in this function
WidgetEvent* internalEvent = aEvent->WidgetEventPtr();
// Let's handle each event with the message of the internal event of the
// coming event. If the DOM event was created with improper interface,
// e.g., keydown event is created with |new MouseEvent("keydown", {});|,
// its message is always 0. Therefore, we can ban such strange event easy.
// However, we need to handle strange "focus" and "blur" event. See the
// following code of this switch statement.
// NOTE: Each event handler may require specific event interface. Before
// calling it, this queries the specific interface. If it would fail,
// each event handler would just ignore the event. So, in this method,
// you don't need to check if the QI succeeded before each call.
switch (internalEvent->mMessage) {
// dragenter
case eDragEnter: {
nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent);
return DragEnter(dragEvent);
}
// dragover
case eDragOver: {
nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent);
return DragOver(dragEvent);
}
// dragexit
case eDragExit: {
nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent);
return DragExit(dragEvent);
}
// drop
case eDrop: {
nsCOMPtr<nsIDOMDragEvent> dragEvent = do_QueryInterface(aEvent);
return Drop(dragEvent);
}
#ifdef HANDLE_NATIVE_TEXT_DIRECTION_SWITCH
// keydown
case eKeyDown: {
nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aEvent);
return KeyDown(keyEvent);
}
// keyup
case eKeyUp: {
nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aEvent);
return KeyUp(keyEvent);
}
#endif // #ifdef HANDLE_NATIVE_TEXT_DIRECTION_SWITCH
// keypress
case eKeyPress: {
nsCOMPtr<nsIDOMKeyEvent> keyEvent = do_QueryInterface(aEvent);
return KeyPress(keyEvent);
}
// mousedown
case eMouseDown: {
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aEvent);
NS_ENSURE_TRUE(mouseEvent, NS_OK);
// EditorEventListener may receive (1) all mousedown, mouseup and click
// events, (2) only mousedown event or (3) only mouseup event.
// mMouseDownOrUpConsumedByIME is used only for ignoring click event if
// preceding mousedown and/or mouseup event is consumed by IME.
// Therefore, even if case #2 or case #3 occurs,
// mMouseDownOrUpConsumedByIME is true here. Therefore, we should always
// overwrite it here.
mMouseDownOrUpConsumedByIME = NotifyIMEOfMouseButtonEvent(mouseEvent);
return mMouseDownOrUpConsumedByIME ? NS_OK : MouseDown(mouseEvent);
}
// mouseup
case eMouseUp: {
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aEvent);
NS_ENSURE_TRUE(mouseEvent, NS_OK);
// See above comment in the eMouseDown case, first.
// This code assumes that case #1 is occuring. However, if case #3 may
// occurs after case #2 and the mousedown is consumed,
// mMouseDownOrUpConsumedByIME is true even though EditorEventListener
// has not received the preceding mousedown event of this mouseup event.
// So, mMouseDownOrUpConsumedByIME may be invalid here. However,
// this is not a matter because mMouseDownOrUpConsumedByIME is referred
// only by eMouseClick case but click event is fired only in case #1.
// So, before a click event is fired, mMouseDownOrUpConsumedByIME is
// always initialized in the eMouseDown case if it's referred.
if (NotifyIMEOfMouseButtonEvent(mouseEvent)) {
mMouseDownOrUpConsumedByIME = true;
}
return mMouseDownOrUpConsumedByIME ? NS_OK : MouseUp(mouseEvent);
}
// click
case eMouseClick: {
nsCOMPtr<nsIDOMMouseEvent> mouseEvent = do_QueryInterface(aEvent);
NS_ENSURE_TRUE(mouseEvent, NS_OK);
// If the preceding mousedown event or mouseup event was consumed,
// editor shouldn't handle this click event.
if (mMouseDownOrUpConsumedByIME) {
mMouseDownOrUpConsumedByIME = false;
mouseEvent->AsEvent()->PreventDefault();
return NS_OK;
}
return MouseClick(mouseEvent);
}
// focus
case eFocus:
return Focus(aEvent);
// blur
case eBlur:
return Blur(aEvent);
// text
case eCompositionChange:
return HandleText(aEvent);
// compositionstart
case eCompositionStart:
return HandleStartComposition(aEvent);
// compositionend
case eCompositionEnd:
HandleEndComposition(aEvent);
return NS_OK;
default:
break;
}
nsAutoString eventType;
aEvent->GetType(eventType);
// We should accept "focus" and "blur" event even if it's synthesized with
// wrong interface for compatibility with older Gecko.
if (eventType.EqualsLiteral("focus")) {
return Focus(aEvent);
}
if (eventType.EqualsLiteral("blur")) {
return Blur(aEvent);
}
#ifdef DEBUG
nsPrintfCString assertMessage("Editor doesn't handle \"%s\" event "
"because its internal event doesn't have proper message",
NS_ConvertUTF16toUTF8(eventType).get());
NS_ASSERTION(false, assertMessage.get());
#endif
return NS_OK;
}
