Fix bug 281732: event handling in camino's native popup got broken when screen-relative coordinates in Cocoa widget were fixed (bug 281470), which caused the nsComboboxControlFrame/nsListControlFrame code to start doing mouse capture, and showing the XUL popup. So add a static method, ToolkitHasNativePopup(), and query that (rather than #ifdeffing). r/sr=roc, a=dbaron.

layout/forms/nsComboboxControlFrame.cpp

@@ -2298,8 +2298,7 @@ nsComboboxControlFrame::Paint(nsPresContext*     aPresContext,
     // If all of the nsITheme implementations are fixed to draw the focus border correctly,
     // this #ifdef should be replaced with a -moz-appearance / ThemeSupportsWidget() check.
 
-#ifndef MOZ_WIDGET_COCOA
-    if (mDisplayFrame) {
+    if (!ToolkitHasNativePopup() && mDisplayFrame) {
       aRenderingContext.PushState();
       nsRect clipRect = mDisplayFrame->GetRect();
       aRenderingContext.SetClipRect(clipRect, nsClipCombine_kIntersect);
@@ -2339,7 +2338,6 @@ nsComboboxControlFrame::Paint(nsPresContext*     aPresContext,
       /////////////////////
       aRenderingContext.PopState();
     }
-#endif
   }
   
   // Call to the base class to draw selection borders when appropriate
@@ -2460,3 +2458,22 @@ nsComboboxControlFrame::RestoreState(nsPresContext* aPresContext,
   rv = stateful->RestoreState(aPresContext, aState);
   return rv;
 }
+
+
+//
+// Some toolkits (just Cocoa at this point) use a native widget
+// for the combobox popup, which affects drawing and event
+// handling here and in nsListControlFrame.
+// 
+
+/* static */
+PRBool
+nsComboboxControlFrame::ToolkitHasNativePopup()
+{
+#ifdef MOZ_WIDGET_COCOA
+  return PR_TRUE;
+#else
+  return PR_FALSE;
+#endif
+}
+

layout/forms/nsComboboxControlFrame.h

@@ -213,6 +213,8 @@ public:
   NS_IMETHOD SaveState(nsPresContext* aPresContext, nsPresState** aState);
   NS_IMETHOD RestoreState(nsPresContext* aPresContext, nsPresState* aState);
 
+  static PRBool ToolkitHasNativePopup();
+
 protected:
 
   NS_IMETHOD CreateDisplayFrame(nsPresContext* aPresContext);

layout/forms/nsListControlFrame.cpp

@@ -35,6 +35,7 @@
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
+
 #include "nscore.h"
 #include "nsCOMPtr.h"
 #include "nsReadableUtils.h"
@@ -52,7 +53,7 @@
 #include "nsIDOMHTMLSelectElement.h" 
 #include "nsIDOMNSHTMLSelectElement.h" 
 #include "nsIDOMHTMLOptionElement.h" 
-#include "nsIComboboxControlFrame.h"
+#include "nsComboboxControlFrame.h"
 #include "nsIViewManager.h"
 #include "nsIScrollableView.h"
 #include "nsIDOMHTMLOptGroupElement.h"
@@ -1355,6 +1356,14 @@ nsListControlFrame::HandleListSelection(nsIDOMEvent* aEvent,
 NS_IMETHODIMP
 nsListControlFrame::CaptureMouseEvents(nsPresContext* aPresContext, PRBool aGrabMouseEvents)
 {
+  // Currently cocoa widgets use a native popup widget which tracks clicks synchronously,
+  // so we never want to do mouse capturing. Note that we only bail if the list
+  // is in drop-down mode, and the caller is requesting capture (we let release capture
+  // requests go through to ensure that we can release capture requested via other
+  // code paths, if any exist).
+  if (aGrabMouseEvents && IsInDropDownMode() && nsComboboxControlFrame::ToolkitHasNativePopup())
+    return NS_OK;
+
   nsIView* view = nsnull;
   if (IsInDropDownMode()) {
     view = GetView();
@@ -1922,7 +1931,7 @@ nsListControlFrame::GetSelectedIndex(PRInt32 * aIndex)
 PRBool 
 nsListControlFrame::IsInDropDownMode() const
 {
-  return((nsnull == mComboboxFrame) ? PR_FALSE : PR_TRUE);
+  return (mComboboxFrame != nsnull);
 }
 
 //---------------------------------------------------------
@@ -2297,7 +2306,7 @@ nsListControlFrame::AboutToRollup()
   // - IF the combobox is different from the current selected index, we
   //   reset the index.
 
-  if (IsInDropDownMode() == PR_TRUE) {
+  if (IsInDropDownMode()) {
     PRInt32 index;
     mComboboxFrame->GetIndexOfDisplayArea(&index);
     ComboboxFinish(index);
@@ -2313,7 +2322,7 @@ nsListControlFrame::DidReflow(nsPresContext*           aPresContext,
 {
   nsresult rv;
   
-  if (PR_TRUE == IsInDropDownMode()) 
+  if (IsInDropDownMode()) 
   {
     //SyncViewWithFrame();
     mState &= ~NS_FRAME_SYNC_FRAME_AND_VIEW;
@@ -2421,7 +2430,7 @@ nsListControlFrame::MouseUp(nsIDOMEvent* aMouseEvent)
   // if a right button click is on the combobox itself
   // or on the select when in listbox mode, then let the click through
   if (!IsLeftButton(aMouseEvent)) {
-    if (IsInDropDownMode() == PR_TRUE) {
+    if (IsInDropDownMode()) {
       if (!IsClickingInCombobox(aMouseEvent)) {
         aMouseEvent->PreventDefault();
 
@@ -2610,7 +2619,6 @@ nsListControlFrame::GetIndexFromDOMEvent(nsIDOMEvent* aMouseEvent,
     rv = NS_ERROR_FAILURE;
   }
 
-
   return rv;
 }
 
@@ -2665,15 +2673,17 @@ nsListControlFrame::MouseDown(nsIDOMEvent* aMouseEvent)
         return NS_OK;
       }
 
+      if (!nsComboboxControlFrame::ToolkitHasNativePopup())
+      {
         PRBool isDroppedDown;
         mComboboxFrame->IsDroppedDown(&isDroppedDown);
         mComboboxFrame->ShowDropDown(!isDroppedDown);
-
         if (isDroppedDown) {
           CaptureMouseEvents(GetPresContext(), PR_FALSE);
         }
       }
     }
+  }
 
   return NS_OK;
 }
@@ -2687,7 +2697,7 @@ nsListControlFrame::MouseMove(nsIDOMEvent* aMouseEvent)
   NS_ASSERTION(aMouseEvent, "aMouseEvent is null.");
   //REFLOW_DEBUG_MSG("MouseMove\n");
 
-  if (IsInDropDownMode() == PR_TRUE) { 
+  if (IsInDropDownMode()) { 
     PRBool isDroppedDown = PR_FALSE;
     mComboboxFrame->IsDroppedDown(&isDroppedDown);
     if (isDroppedDown) {
@@ -2716,7 +2726,7 @@ nsListControlFrame::DragMove(nsIDOMEvent* aMouseEvent)
   NS_ASSERTION(aMouseEvent, "aMouseEvent is null.");
   //REFLOW_DEBUG_MSG("DragMove\n");
 
-  if (IsInDropDownMode() == PR_FALSE) { 
+  if (!IsInDropDownMode()) { 
     PRInt32 selectedIndex;
     if (NS_SUCCEEDED(GetIndexFromDOMEvent(aMouseEvent, selectedIndex))) {
       // Don't waste cycles if we already dragged over this item
@@ -2942,7 +2952,9 @@ nsListControlFrame::GetIncrementalString()
 void
 nsListControlFrame::DropDownToggleKey(nsIDOMEvent* aKeyEvent)
 {
-  if (IsInDropDownMode()) {
+  // Cocoa widgets do native popups, so don't try to show
+  // dropdowns there.
+  if (IsInDropDownMode() && !nsComboboxControlFrame::ToolkitHasNativePopup()) {
     PRBool isDroppedDown;
     mComboboxFrame->IsDroppedDown(&isDroppedDown);
     mComboboxFrame->ShowDropDown(!isDroppedDown);
@@ -3202,7 +3214,7 @@ nsListControlFrame::KeyPress(nsIDOMEvent* aKeyEvent)
     // XXX - Are we cover up a problem here???
     // Why aren't they getting flushed each time?
     // because this isn't needed for Gfx
-    if (IsInDropDownMode() == PR_TRUE) {
+    if (IsInDropDownMode()) {
       // Don't flush anything but reflows lest it destroy us
       GetPresContext()->PresShell()->
         GetDocument()->FlushPendingNotifications(Flush_OnlyReflow);