Bug 895243 - Hide selection monocles when the user edge swipes to hide the urlbar. r=mbrubeck

browser/metro/base/content/helperui/ChromeSelectionHandler.js

@@ -272,6 +272,14 @@ var ChromeSelectionHandler = {
     this.sendAsync("Content:HandlerShutdown", {});
   },
 
+  get hasSelection() {
+    if (!this._targetElement) {
+      return false;
+    }
+    let selection = this._getSelection();
+    return (selection && !selection.isCollapsed);
+  },
+
   /*************************************************
    * Events
    */

browser/metro/base/content/helperui/SelectionHelperUI.js

@@ -525,6 +525,7 @@ var SelectionHelperUI = {
     Elements.browsers.addEventListener("ZoomChanged", this, true);
 
     Elements.navbar.addEventListener("transitionend", this, true);
+    Elements.navbar.addEventListener("MozAppbarDismissing", this, true);
 
     this.overlay.enabled = true;
   },
@@ -551,6 +552,7 @@ var SelectionHelperUI = {
     Elements.browsers.removeEventListener("ZoomChanged", this, true);
 
     Elements.navbar.removeEventListener("transitionend", this, true);
+    Elements.navbar.removeEventListener("MozAppbarDismissing", this, true);
 
     this._shutdownAllMarkers();
 
@@ -897,9 +899,23 @@ var SelectionHelperUI = {
     if (this.layerMode == kContentLayer) {
       return;
     }
+
     if (aEvent.propertyName == "bottom" && Elements.navbar.isShowing) {
       this._sendAsyncMessage("Browser:SelectionUpdate", {});
+      return;
     }
+    
+    if (aEvent.propertyName == "transform" && Elements.navbar.isShowing) {
+      this._sendAsyncMessage("Browser:SelectionUpdate", {});
+      this._showMonocles(ChromeSelectionHandler.hasSelection);
+    }
+  },
+
+  _onNavBarDismissEvent: function _onNavBarDismissEvent() {
+    if (!this.isActive || this.layerMode == kContentLayer) {
+      return;
+    }
+    this._hideMonocles();
   },
 
   /*
@@ -1051,6 +1067,10 @@ var SelectionHelperUI = {
       case "transitionend":
         this._onNavBarTransitionEvent(aEvent);
         break;
+
+      case "MozAppbarDismissing":
+        this._onNavBarDismissEvent();
+        break;
     }
   },