Bug 1686613 - Add a non-native-theme media query. r=heycam

Differential Revision: https://phabricator.services.mozilla.com/D102457

layout/style/GeckoBindings.h

@@ -613,6 +613,7 @@ bool Gecko_IsMainThread();
 mozilla::StyleDisplayMode Gecko_MediaFeatures_GetDisplayMode(
     const mozilla::dom::Document*);
 
+bool Gecko_MediaFeatures_ShouldAvoidNativeTheme(const mozilla::dom::Document*);
 uint32_t Gecko_MediaFeatures_GetColorDepth(const mozilla::dom::Document*);
 uint32_t Gecko_MediaFeatures_GetMonochromeBitsPerPixel(
     const mozilla::dom::Document*);

layout/style/nsMediaFeatures.cpp

@@ -96,6 +96,10 @@ bool Gecko_MediaFeatures_IsResourceDocument(const Document* aDocument) {
   return aDocument->IsResourceDoc();
 }
 
+bool Gecko_MediaFeatures_ShouldAvoidNativeTheme(const Document* aDocument) {
+  return aDocument->ShouldAvoidNativeTheme();
+}
+
 static nsDeviceContext* GetDeviceContextFor(const Document* aDocument) {
   nsPresContext* pc = aDocument->GetPresContext();
   if (!pc) {

layout/style/test/chrome/test_chrome_only_media_queries.html

@@ -47,6 +47,7 @@ function testToggle(toggle) {
 const TOGGLES = [
   "-moz-is-glyph",
   "-moz-print-preview",
+  "-moz-non-native-content-theme",
   "-moz-scrollbar-start-backward",
   "-moz-scrollbar-start-forward",
   "-moz-scrollbar-end-backward",

servo/components/style/gecko/media_features.rs

@@ -543,6 +543,16 @@ fn eval_moz_print_preview(
     query_value.map_or(is_print_preview, |v| v == is_print_preview)
 }
 
+fn eval_moz_non_native_content_theme(
+    device: &Device,
+    query_value: Option<bool>,
+    _: Option<RangeOrOperator>,
+) -> bool {
+    let non_native_theme =
+        unsafe { bindings::Gecko_MediaFeatures_ShouldAvoidNativeTheme(device.document()) };
+    query_value.map_or(non_native_theme, |v| v == non_native_theme)
+}
+
 fn eval_moz_is_resource_document(
     device: &Device,
     query_value: Option<bool>,
@@ -610,7 +620,7 @@ 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; 55] = [
+pub static MEDIA_FEATURES: [MediaFeatureDescription; 56] = [
     feature!(
         atom!("width"),
         AllowsRanges::Yes,
@@ -814,6 +824,12 @@ pub static MEDIA_FEATURES: [MediaFeatureDescription; 55] = [
         Evaluator::BoolInteger(eval_moz_print_preview),
         ParsingRequirements::CHROME_AND_UA_ONLY,
     ),
+    feature!(
+        atom!("-moz-non-native-content-theme"),
+        AllowsRanges::No,
+        Evaluator::BoolInteger(eval_moz_non_native_content_theme),
+        ParsingRequirements::CHROME_AND_UA_ONLY,
+    ),
     system_metric_feature!(atom!("-moz-scrollbar-start-backward")),
     system_metric_feature!(atom!("-moz-scrollbar-start-forward")),
     system_metric_feature!(atom!("-moz-scrollbar-end-backward")),

xpcom/ds/StaticAtoms.py

@@ -50,6 +50,7 @@ STATIC_ATOMS = [
     Atom("_moz_is_glyph", "-moz-is-glyph"),
     Atom("_moz_original_size", "_moz_original_size"),
     Atom("_moz_print_preview", "-moz-print-preview"),
+    Atom("_moz_non_native_content_theme", "-moz-non-native-content-theme"),
     Atom("menuactive", "_moz-menuactive"),
     Atom("_poundDefault", "#default"),
     Atom("_asterisk", "*"),