Bug 1322938 - Emit close event when HTMLDialogElement.prototype.close() is called.

Tag #1343

dom/events/EventNameList.h

@@ -172,6 +172,10 @@ EVENT(click,
       eMouseClick,
       EventNameType_All,
       eMouseEventClass)
+EVENT(close,
+      eClose,
+      EventNameType_HTML,
+      eBasicEventClass)
 EVENT(contextmenu,
       eContextMenu,
       EventNameType_HTMLXUL,

dom/html/HTMLDialogElement.cpp

@@ -30,6 +30,9 @@ HTMLDialogElement::Close(const mozilla::dom::Optional<nsAString>& aReturnValue)
   ErrorResult ignored;
   SetOpen(false, ignored);
   ignored.SuppressException();
+  RefPtr<AsyncEventDispatcher> eventDispatcher =
+    new AsyncEventDispatcher(this, NS_LITERAL_STRING("close"), false);
+  eventDispatcher->PostDOMEvent();
 }
 
 void

dom/html/HTMLDialogElement.h

@@ -7,6 +7,7 @@
 #ifndef HTMLDialogElement_h
 #define HTMLDialogElement_h
 
+#include "mozilla/AsyncEventDispatcher.h"
 #include "mozilla/Attributes.h"
 #include "nsGenericHTMLElement.h"
 #include "nsGkAtoms.h"

dom/webidl/EventHandler.webidl

@@ -38,7 +38,7 @@ interface GlobalEventHandlers {
            attribute EventHandler oncanplaythrough;
            attribute EventHandler onchange;
            attribute EventHandler onclick;
-           //(Not implemented)attribute EventHandler onclose;
+           attribute EventHandler onclose;
            attribute EventHandler oncontextmenu;
            //(Not implemented)attribute EventHandler oncuechange;
            attribute EventHandler ondblclick;

widget/EventMessageList.h

@@ -457,6 +457,9 @@ NS_EVENT_MESSAGE(eVisibilityChange)
 // Details element events.
 NS_EVENT_MESSAGE(eToggle)
 
+// Dialog element events.
+NS_EVENT_MESSAGE(eClose)
+
 #ifdef UNDEF_NS_EVENT_MESSAGE_FIRST_LAST
 #undef UNDEF_NS_EVENT_MESSAGE_FIRST_LAST
 #undef NS_EVENT_MESSAGE_FIRST_LAST