Bug 1485063 Part 3 - Move preferences which enable AccessibleCaret to StaticPrefList.h. r=mats

Differential Revision: https://phabricator.services.mozilla.com/D5472

--HG--
extra : moz-landing-system : lando

layout/base/PresShell.cpp

@@ -23,6 +23,7 @@
 #include "mozilla/Logging.h"
 #include "mozilla/MouseEvents.h"
 #include "mozilla/Sprintf.h"
+#include "mozilla/StaticPrefs.h"
 #include "mozilla/TextEvents.h"
 #include "mozilla/TimeStamp.h"
 #include "mozilla/TouchEvents.h"
@@ -725,25 +726,18 @@ nsIPresShell::FrameSelection()
 
 static bool sSynthMouseMove = true;
 static uint32_t sNextPresShellId;
-static bool sAccessibleCaretEnabled = false;
-static bool sAccessibleCaretOnTouch = false;
 
 /* static */ bool
 PresShell::AccessibleCaretEnabled(nsIDocShell* aDocShell)
 {
-  static bool initialized = false;
-  if (!initialized) {
-    Preferences::AddBoolVarCache(&sAccessibleCaretEnabled, "layout.accessiblecaret.enabled");
-    Preferences::AddBoolVarCache(&sAccessibleCaretOnTouch, "layout.accessiblecaret.enabled_on_touch");
-    initialized = true;
-  }
   // If the pref forces it on, then enable it.
-  if (sAccessibleCaretEnabled) {
+  if (StaticPrefs::layout_accessiblecaret_enabled()) {
     return true;
   }
   // If the touch pref is on, and touch events are enabled (this depends
   // on the specific device running), then enable it.
-  if (sAccessibleCaretOnTouch && dom::TouchEvent::PrefEnabled(aDocShell)) {
+  if (StaticPrefs::layout_accessiblecaret_enabled_on_touch() &&
+      dom::TouchEvent::PrefEnabled(aDocShell)) {
     return true;
   }
   // Otherwise, disabled.

modules/libpref/init/StaticPrefList.h

@@ -446,6 +446,25 @@ VARCACHE_PREF(
 // Layout prefs
 //---------------------------------------------------------------------------
 
+// Debug-only pref to force enable the AccessibleCaret. If you want to
+// control AccessibleCaret by mouse, you'll need to set
+// "layout.accessiblecaret.hide_carets_for_mouse_input" to false.
+VARCACHE_PREF(
+  "layout.accessiblecaret.enabled",
+   layout_accessiblecaret_enabled,
+  bool, false
+)
+
+// Enable the accessible caret on platforms/devices
+// that we detect have touch support. Note that this pref is an
+// additional way to enable the accessible carets, rather than
+// overriding the layout.accessiblecaret.enabled pref.
+VARCACHE_PREF(
+  "layout.accessiblecaret.enabled_on_touch",
+   layout_accessiblecaret_enabled_on_touch,
+  bool, false
+)
+
 // CSS attributes (width, height, margin-left) of the AccessibleCaret in CSS
 // pixels.
 VARCACHE_PREF(

modules/libpref/init/all.js

@@ -5514,17 +5514,6 @@ pref("plugins.flashBlock.enabled", false);
 // Turn off Spatial navigation by default.
 pref("snav.enabled", false);
 
-// Debug-only pref to force enable the AccessibleCaret. If you want to
-// control AccessibleCaret by mouse, you'll need to set
-// "layout.accessiblecaret.hide_carets_for_mouse_input" to false.
-pref("layout.accessiblecaret.enabled", false);
-
-// Enable the accessible caret on platforms/devices
-// that we detect have touch support. Note that this pref is an
-// additional way to enable the accessible carets, rather than
-// overriding the layout.accessiblecaret.enabled pref.
-pref("layout.accessiblecaret.enabled_on_touch", true);
-
 // Show the caret when long tapping on an empty content.
 pref("layout.accessiblecaret.caret_shown_when_long_tapping_on_empty_content", false);