Bug 1090008 Dispatch SelectionStateChanged event for blur, r=roc r=smaug

dom/base/nsFocusManager.cpp

@@ -1612,7 +1612,7 @@ nsFocusManager::Blur(nsPIDOMWindow* aWindowToClear,
 
   nsRefPtr<SelectionCarets> selectionCarets = presShell->GetSelectionCarets();
   if (selectionCarets) {
-    selectionCarets->SetVisibility(false);
+    selectionCarets->NotifyBlur();
   }
 
   bool clearFirstBlurEvent = false;

dom/browser-element/BrowserElementChildPreload.js

@@ -595,9 +595,6 @@ BrowserElementChild.prototype = {
   _selectionStateChangedHandler: function(e) {
     e.stopPropagation();
     let boundingClientRect = e.boundingClientRect;
-    if (!boundingClientRect) {
-      return;
-    }
 
     let isCollapsed = (e.selectedText.length == 0);
     let isMouseUp = (e.states.indexOf('mouseup') == 0);
@@ -644,12 +641,12 @@ BrowserElementChild.prototype = {
 
     let detail = {
       rect: {
-        width: boundingClientRect.width,
-        height: boundingClientRect.height,
-        top: boundingClientRect.top,
-        bottom: boundingClientRect.bottom,
-        left: boundingClientRect.left,
-        right: boundingClientRect.right,
+        width: boundingClientRect ? boundingClientRect.width : 0,
+        height: boundingClientRect ? boundingClientRect.height : 0,
+        top: boundingClientRect ? boundingClientRect.top : 0,
+        bottom: boundingClientRect ? boundingClientRect.bottom : 0,
+        left: boundingClientRect ? boundingClientRect.left : 0,
+        right: boundingClientRect ? boundingClientRect.right : 0,
       },
       commands: {
         canSelectAll: this._isCommandEnabled("selectall"),

dom/webidl/SelectionStateChangedEvent.webidl

@@ -11,7 +11,8 @@ enum SelectionState {
   "keypress",
   "selectall",
   "collapsetostart",
-  "collapsetoend"
+  "collapsetoend",
+  "blur"
 };
 
 dictionary SelectionStateChangedEventInit : EventInit {

layout/base/SelectionCarets.cpp

@@ -1029,6 +1029,16 @@ DispatchSelectionStateChangedEvent(nsIPresShell* aPresShell,
   doc->DispatchEvent(event, &ret);
 }
 
+void
+SelectionCarets::NotifyBlur()
+{
+  SetVisibility(false);
+
+  dom::Sequence<SelectionState> state;
+  state.AppendElement(dom::SelectionState::Blur);
+  DispatchSelectionStateChangedEvent(mPresShell, nullptr, state);
+}
+
 nsresult
 SelectionCarets::NotifySelectionChanged(nsIDOMDocument* aDoc,
                                         nsISelection* aSel,

layout/base/SelectionCarets.h

@@ -75,6 +75,9 @@ public:
   NS_DECL_NSIREFLOWOBSERVER
   NS_DECL_NSISELECTIONLISTENER
 
+  // Notify selection carets about the blur event to hidden itself
+  void NotifyBlur();
+
   // nsIScrollObserver
   virtual void ScrollPositionChanged() MOZ_OVERRIDE;
 
@@ -87,11 +90,6 @@ public:
 
   nsEventStatus HandleEvent(WidgetEvent* aEvent);
 
-  /**
-   * Set visibility for selection caret.
-   */
-  void SetVisibility(bool aVisible);
-
   bool GetVisibility() const
   {
     return mVisible;
@@ -111,6 +109,11 @@ private:
 
   SelectionCarets() MOZ_DELETE;
 
+  /**
+   * Set visibility for selection caret.
+   */
+  void SetVisibility(bool aVisible);
+
   /**
    * Update selection caret position base on current selection range.
    */