Backed out changeset 8a06f8cd41a9 (bug 1037066) for regressions: bug 1055214, bug 1049250, bug 1055203.

widget/gonk/nsAppShell.cpp

@@ -196,29 +196,8 @@ UserInputData::DOMModifiers() const
 }
 
 static void
-sendMouseEvent(UserInputData& data, nsEventStatus status)
+sendMouseEvent(uint32_t msg, UserInputData& data, bool forwardToChildren)
 {
-    int32_t action = data.action & AMOTION_EVENT_ACTION_MASK;
-    uint32_t msg;
-    switch (action) {
-    case AMOTION_EVENT_ACTION_DOWN:
-        msg = NS_MOUSE_BUTTON_DOWN;
-        break;
-    case AMOTION_EVENT_ACTION_POINTER_DOWN:
-    case AMOTION_EVENT_ACTION_POINTER_UP:
-    case AMOTION_EVENT_ACTION_MOVE:
-    case AMOTION_EVENT_ACTION_HOVER_MOVE:
-        msg = NS_MOUSE_MOVE;
-        break;
-    case AMOTION_EVENT_ACTION_OUTSIDE:
-    case AMOTION_EVENT_ACTION_CANCEL:
-    case AMOTION_EVENT_ACTION_UP:
-        msg = NS_MOUSE_BUTTON_UP;
-        break;
-    default:
-        return;
-    }
-
     WidgetMouseEvent event(true, msg, nullptr,
                            WidgetMouseEvent::eReal, WidgetMouseEvent::eNormal);
 
@@ -231,7 +210,7 @@ sendMouseEvent(UserInputData& data, nsEventStatus status)
         event.clickCount = 1;
     event.modifiers = data.DOMModifiers();
 
-    event.mFlags.mNoCrossProcessBoundaryForwarding = status == nsEventStatus_eConsumeNoDefault;
+    event.mFlags.mNoCrossProcessBoundaryForwarding = !forwardToChildren;
 
     nsWindow::DispatchInputEvent(event);
 }
@@ -788,30 +767,35 @@ GeckoInputDispatcher::dispatchOnce()
             if (mEnabledUniformityInfo) {
                 printUniformityInfo(data);
             }
-            if (!captured) {
-                sendMouseEvent(data, status);
+            if (captured) {
+                return;
             }
         }
 
-        if (action == AMOTION_EVENT_ACTION_DOWN ||
-            action == AMOTION_EVENT_ACTION_POINTER_DOWN) {
-            // Bug 1037066: Simulate a touchmove/mousemove event pair at the
-            // same spot as the touchstart/mousedown pair, but immediately after
-            // it. This allows content to preventDefault the first touchmove in
-            // a timely manner, even if the user keeps their finger stationary
-            // after the touchstart. The ultimate end goal here is to allow APZ
-            // to receive a prevent-default=yes|no message ASAP.
-            UserInputData simulatedMoveEvent(data);
-            simulatedMoveEvent.action &= ~AMOTION_EVENT_ACTION_MASK;
-            simulatedMoveEvent.action |= AMOTION_EVENT_ACTION_MOVE;
-
-            bool captured;
-            status = sendTouchEvent(simulatedMoveEvent, &captured);
-            if (!captured) {
-                sendMouseEvent(simulatedMoveEvent, status);
+        uint32_t msg;
+        switch (action) {
+        case AMOTION_EVENT_ACTION_DOWN:
+            msg = NS_MOUSE_BUTTON_DOWN;
+            break;
+        case AMOTION_EVENT_ACTION_POINTER_DOWN:
+        case AMOTION_EVENT_ACTION_POINTER_UP:
+        case AMOTION_EVENT_ACTION_MOVE:
+        case AMOTION_EVENT_ACTION_HOVER_MOVE:
+            msg = NS_MOUSE_MOVE;
+            break;
+        case AMOTION_EVENT_ACTION_OUTSIDE:
+        case AMOTION_EVENT_ACTION_CANCEL:
+        case AMOTION_EVENT_ACTION_UP:
+            msg = NS_MOUSE_BUTTON_UP;
+            break;
+        default:
+            msg = NS_EVENT_NULL;
+            break;
         }
+        if (msg != NS_EVENT_NULL) {
+            sendMouseEvent(msg, data, 
+                           status != nsEventStatus_eConsumeNoDefault);
         }
-
         break;
     }
     case UserInputData::KEY_DATA: {