Bug 1394926 - Add APZ autoscroll information to about:support. r=kats

MozReview-Commit-ID: FlZNdHuoirG

--HG--
extra : rebase_source : 1cc352dc9a19c4a15d5bf7e75370a68c13024dda

gfx/thebes/gfxPlatform.cpp

@@ -2737,6 +2737,10 @@ gfxPlatform::GetApzSupportInfo(mozilla::widget::InfoObject& aObj)
   if (SupportsApzKeyboardInput() && !gfxPrefs::AccessibilityBrowseWithCaret()) {
     aObj.DefineProperty("ApzKeyboardInput", 1);
   }
+
+  if (SupportsApzAutoscrolling()) {
+    aObj.DefineProperty("ApzAutoscrollInput", 1);
+  }
 }
 
 void
@@ -2912,6 +2916,12 @@ gfxPlatform::SupportsApzKeyboardInput() const
   return gfxPrefs::APZKeyboardEnabled();
 }
 
+bool
+gfxPlatform::SupportsApzAutoscrolling() const
+{
+  return gfxPrefs::APZAutoscrollEnabled();
+}
+
 void
 gfxPlatform::InitOpenGLConfig()
 {

gfx/thebes/gfxPlatform.h

@@ -642,6 +642,7 @@ public:
     bool SupportsApzTouchInput() const;
     bool SupportsApzDragInput() const;
     bool SupportsApzKeyboardInput() const;
+    bool SupportsApzAutoscrolling() const;
 
     virtual void FlushContentDrawing() {}
 

toolkit/content/aboutSupport.js

@@ -258,7 +258,7 @@ var snapshotFormatters = {
     let apzInfo = [];
     let formatApzInfo = function(info) {
       let out = [];
-      for (let type of ["Wheel", "Touch", "Drag", "Keyboard"]) {
+      for (let type of ["Wheel", "Touch", "Drag", "Keyboard", "Autoscroll"]) {
         let key = "Apz" + type + "Input";
 
         if (!(key in info))

toolkit/locales/en-US/chrome/global/aboutSupport.properties

@@ -144,6 +144,7 @@ wheelEnabled = wheel input enabled
 touchEnabled = touch input enabled
 dragEnabled = scrollbar drag enabled
 keyboardEnabled = keyboard enabled
+autoscrollEnabled = autoscroll enabled
 
 # LOCALIZATION NOTE %1 will be replaced with the key of a preference.
 wheelWarning = async wheel input disabled due to unsupported pref: %S