Bug 1659264 - Remove all references to the preference 'layout.css.moz-touch-enabled.enabled'. r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D91401

layout/style/nsMediaFeatures.cpp

@@ -426,11 +426,6 @@ void nsMediaFeatures::InitSystemMetrics() {
         (nsStaticAtom*)nsGkAtoms::_moz_windows_classic);
   }
 
-  rv = LookAndFeel::GetInt(LookAndFeel::IntID::TouchEnabled, &metricResult);
-  if (NS_SUCCEEDED(rv) && metricResult) {
-    sSystemMetrics->AppendElement((nsStaticAtom*)nsGkAtoms::_moz_touch_enabled);
-  }
-
   rv = LookAndFeel::GetInt(LookAndFeel::IntID::SwipeAnimationEnabled,
                            &metricResult);
   if (NS_SUCCEEDED(rv) && metricResult) {

layout/style/test/chrome/bug418986-2.js

@@ -74,10 +74,6 @@ var suppressed_toggles = [
 ];
 
 var toggles_enabled_in_content = [];
-if (SpecialPowers.getBoolPref("layout.css.moz-touch-enabled.enabled")) {
-  suppressed_toggles.push("-moz-touch-enabled");
-  toggles_enabled_in_content.push("-moz-touch-enabled");
-}
 
 // Possible values for '-moz-os-version'
 var windows_versions = ["windows-win7", "windows-win8", "windows-win10"];

layout/style/test/chrome/test_chrome_only_media_queries.html

@@ -62,10 +62,6 @@ const TOGGLES = [
   "-moz-swipe-animation-enabled",
 ];
 
-if (SpecialPowers.getBoolPref("layout.css.moz-touch-enabled.enabled")) {
-  TOGGLES.push("-moz-touch-enabled");
-}
-
 for (let i = 0; i < TOGGLES.length; ++i) {
   testToggle(TOGGLES[i])
 }

layout/style/test/test_media_queries.html

@@ -768,7 +768,6 @@ function run() {
   expression_should_not_be_parseable("-moz-windows-compositor: -1");
   expression_should_not_be_parseable("-moz-windows-classic: -1");
   expression_should_not_be_parseable("-moz-windows-glass: -1");
-  expression_should_not_be_parseable("-moz-touch-enabled: -1");
   expression_should_not_be_parseable("-moz-swipe-animation-enabled: -1");
   expression_should_not_be_parseable("-moz-gtk-csd-available: -1");
   expression_should_not_be_parseable("-moz-gtk-csd-hide-titlebar-by-default: -1");
@@ -791,7 +790,6 @@ function run() {
   expression_should_not_be_parseable("-moz-windows-compositor: true");
   expression_should_not_be_parseable("-moz-windows-classic: true");
   expression_should_not_be_parseable("-moz-windows-glass: true");
-  expression_should_not_be_parseable("-moz-touch-enabled: true");
   expression_should_not_be_parseable("-moz-swipe-animation-enabled: true");
   expression_should_not_be_parseable("-moz-gtk-csd-available: true");
   expression_should_not_be_parseable("-moz-gtk-csd-hide-titlebar-by-default: true");
@@ -807,15 +805,6 @@ function run() {
   expression_should_not_be_parseable("-moz-os-version: windows-win10");
   expression_should_not_be_parseable("-moz-os-version: ");
 
-  {
-    let should_be_parseable_if_enabled = SpecialPowers.getBoolPref('layout.css.moz-touch-enabled.enabled')
-      ? expression_should_be_parseable
-      : expression_should_not_be_parseable;
-    should_be_parseable_if_enabled("-moz-touch-enabled");
-    should_be_parseable_if_enabled("-moz-touch-enabled: 0");
-    should_be_parseable_if_enabled("-moz-touch-enabled: 1");
-  }
-
   {
     let should_be_parseable_if_enabled = SpecialPowers.getBoolPref('layout.css.prefers-contrast.enabled')
       ? expression_should_be_parseable

modules/libpref/init/StaticPrefList.yaml

@@ -6043,13 +6043,6 @@
   mirror: always
   rust: true
 
-# Expose the media query -moz-touch-enabled to web content.
-- name: layout.css.moz-touch-enabled.enabled
-  type: RelaxedAtomicBool
-  value: false
-  mirror: always
-  rust: true
-
 # Pref to control whether the ::marker property restrictions defined in [1]
 # apply.
 #

servo/components/style/gecko/media_features.rs

@@ -559,19 +559,6 @@ fn eval_system_metric(
     query_value.map_or(supports_metric, |v| v == supports_metric)
 }
 
-fn eval_moz_touch_enabled(
-    device: &Device,
-    query_value: Option<bool>,
-    _: Option<RangeOrOperator>,
-) -> bool {
-    eval_system_metric(
-        device,
-        query_value,
-        atom!("-moz-touch-enabled"),
-        /* accessible_from_content = */ true,
-    )
-}
-
 fn eval_moz_os_version(
     device: &Device,
     query_value: Option<Atom>,
@@ -613,7 +600,7 @@ macro_rules! system_metric_feature {
 /// to support new types in these entries and (2) ensuring that either
 /// nsPresContext::MediaFeatureValuesChanged is called when the value that
 /// would be returned by the evaluator function could change.
-pub static MEDIA_FEATURES: [MediaFeatureDescription; 56] = [
+pub static MEDIA_FEATURES: [MediaFeatureDescription; 55] = [
     feature!(
         atom!("width"),
         AllowsRanges::Yes,
@@ -840,13 +827,4 @@ pub static MEDIA_FEATURES: [MediaFeatureDescription; 56] = [
     system_metric_feature!(atom!("-moz-gtk-csd-close-button")),
     system_metric_feature!(atom!("-moz-gtk-csd-reversed-placement")),
     system_metric_feature!(atom!("-moz-system-dark-theme")),
-    // This is the only system-metric media feature that's accessible to
-    // content as of today.
-    // FIXME(emilio): Restrict (or remove?) when bug 1035774 lands.
-    feature!(
-        atom!("-moz-touch-enabled"),
-        AllowsRanges::No,
-        Evaluator::BoolInteger(eval_moz_touch_enabled),
-        ParsingRequirements::empty(),
-    ),
 ];

servo/components/style/media_queries/media_feature_expression.rs

@@ -221,9 +221,6 @@ fn consume_operation_or_colon(input: &mut Parser) -> Result<Option<Operator>, ()
 fn disabled_by_pref(feature: &Atom, context: &ParserContext) -> bool {
     #[cfg(feature = "gecko")]
     {
-        if *feature == atom!("-moz-touch-enabled") {
-            return !static_prefs::pref!("layout.css.moz-touch-enabled.enabled");
-        }
         if *feature == atom!("forced-colors") {
             return !static_prefs::pref!("layout.css.forced-colors.enabled");
         }

xpcom/ds/StaticAtoms.py

@@ -2242,7 +2242,6 @@ STATIC_ATOMS = [
     Atom("_moz_windows_classic", "-moz-windows-classic"),
     Atom("_moz_windows_glass", "-moz-windows-glass"),
     Atom("_moz_os_version", "-moz-os-version"),
-    Atom("_moz_touch_enabled", "-moz-touch-enabled"),
     Atom("_moz_menubar_drag", "-moz-menubar-drag"),
     Atom("_moz_device_pixel_ratio", "-moz-device-pixel-ratio"),
     Atom("_moz_device_orientation", "-moz-device-orientation"),