Bug 1121313 - Part 2. Don't generate composition event on child process if parent process doesn't send composition event by NotifyIME. r=masayuki

widget/PuppetWidget.cpp

@@ -109,7 +109,6 @@ PuppetWidget::Create(nsIWidget        *aParent,
   mDrawTarget = gfxPlatform::GetPlatform()->
     CreateOffscreenContentDrawTarget(IntSize(1, 1), SurfaceFormat::B8G8R8A8);
 
-  mIMEComposing = false;
   mNeedIMEStateInit = MightNeedIMEFocus(aInitData);
 
   PuppetWidget* parent = static_cast<PuppetWidget*>(aParent);
@@ -305,9 +304,6 @@ PuppetWidget::DispatchEvent(WidgetGUIEvent* event, nsEventStatus& aStatus)
 
   aStatus = nsEventStatus_eIgnore;
 
-  if (event->message == NS_COMPOSITION_START) {
-    mIMEComposing = true;
-  }
   uint32_t seqno = kLatestSeqno;
   switch (event->mClass) {
   case eCompositionEventClass:
@@ -330,11 +326,6 @@ PuppetWidget::DispatchEvent(WidgetGUIEvent* event, nsEventStatus& aStatus)
     aStatus = mAttachedWidgetListener->HandleEvent(event, mUseAttachedEvents);
   }
 
-  if (event->mClass == eCompositionEventClass &&
-      event->AsCompositionEvent()->CausesDOMCompositionEndEvent()) {
-    mIMEComposing = false;
-  }
-
   return NS_OK;
 }
 
@@ -402,19 +393,21 @@ PuppetWidget::IMEEndComposition(bool aCancel)
 #endif
 
   nsEventStatus status;
+  bool noCompositionEvent = false;
   WidgetCompositionEvent compositionCommitEvent(true, NS_COMPOSITION_COMMIT,
                                                 this);
   InitEvent(compositionCommitEvent, nullptr);
   // SendEndIMEComposition is always called since ResetInputState
   // should always be called even if we aren't composing something.
   if (!mTabChild ||
-      !mTabChild->SendEndIMEComposition(aCancel,
+      !mTabChild->SendEndIMEComposition(aCancel, &noCompositionEvent,
                                         &compositionCommitEvent.mData)) {
     return NS_ERROR_FAILURE;
   }
 
-  if (!mIMEComposing)
+  if (noCompositionEvent) {
     return NS_OK;
+  }
 
   compositionCommitEvent.mSeqno = mIMELastReceivedSeqno;
   DispatchEvent(&compositionCommitEvent, status);