Bug 654136 - Bixi site causing browser content interactivity issues in Fennec [r=mfinkle]

mobile/chrome/content/browser.js

@@ -3019,6 +3019,8 @@ var ViewableAreaObserver = {
     return (this._height || window.innerHeight);
   },
 
+  isKeyboardOpened: false,
+
   observe: function va_observe(aSubject, aTopic, aData) {
 #if MOZ_PLATFORM_MAEMO == 6
     let rect = Rect.fromRect(JSON.parse(aData));
@@ -3045,6 +3047,9 @@ var ViewableAreaObserver = {
     if (newHeight == oldHeight && newWidth == oldWidth)
       return;
 
+    // Guess if the window has been resize to handle a virtual keyboard
+    this.isKeyboardOpened = (newHeight < oldHeight && newWidth == oldWidth);
+
     Browser.styles["viewable-height"].height = newHeight + "px";
     Browser.styles["viewable-height"].maxHeight = newHeight + "px";
 
@@ -3076,3 +3081,4 @@ var ViewableAreaObserver = {
     }, 0);
   }
 };
+

mobile/chrome/content/common-ui.js

@@ -829,6 +829,9 @@ var FormHelperUI = {
         break;
 
       case "FormAssist:Resize":
+        if (!ViewableAreaObserver.isKeyboardOpened)
+          return;
+
         let element = json.current;
         this._zoom(Rect.fromRect(element.rect), Rect.fromRect(element.caretRect));
         break;
@@ -838,6 +841,9 @@ var FormHelperUI = {
         break;
 
        case "FormAssist:Update":
+        if (!ViewableAreaObserver.isKeyboardOpened)
+          return;
+
         Browser.hideSidebars();
         Browser.hideTitlebar();
         this._zoom(null, Rect.fromRect(json.caretRect));