1 files changed, 71 insertions, 0 deletions
diff --git a/layout/style/CSS.cpp b/layout/style/CSS.cpp
new file mode 100644
index 0000000000..28db5a34c5
--- /dev/null
+++ b/layout/style/CSS.cpp
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* DOM object holding utility CSS functions */
+
+#include "CSS.h"
+
+#include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/dom/HighlightRegistry.h"
+#include "mozilla/ServoBindings.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/DocumentInlines.h"
+#include "nsStyleUtil.h"
+#include "xpcpublic.h"
+
+namespace mozilla::dom {
+
+/* static */
+bool CSS::Supports(const GlobalObject&, const nsACString& aProperty,
+                   const nsACString& aValue) {
+  return Servo_CSSSupports2(&aProperty, &aValue);
+}
+
+/* static */
+bool CSS::Supports(const GlobalObject&, const nsACString& aCondition) {
+  return Servo_CSSSupports(&aCondition, /* ua = */ false, /* chrome = */ false,
+                           /* quirks = */ false);
+}
+
+/* static */
+void CSS::Escape(const GlobalObject&, const nsAString& aIdent,
+                 nsAString& aReturn) {
+  nsStyleUtil::AppendEscapedCSSIdent(aIdent, aReturn);
+}
+
+static Document* GetDocument(const GlobalObject& aGlobal) {
+  nsCOMPtr<nsPIDOMWindowInner> window =
+      do_QueryInterface(aGlobal.GetAsSupports());
+  MOZ_DIAGNOSTIC_ASSERT(window, "CSS is only exposed to window globals");
+  if (!window) {
+    return nullptr;
+  }
+  return window->GetExtantDoc();
+}
+
+/* static */
+HighlightRegistry* CSS::GetHighlights(const GlobalObject& aGlobal,
+                                      ErrorResult& aRv) {
+  Document* doc = GetDocument(aGlobal);
+  if (!doc) {
+    aRv.ThrowUnknownError("No document associated to this global?");
+    return nullptr;
+  }
+  return &doc->HighlightRegistry();
+}
+
+/* static */
+void CSS::RegisterProperty(const GlobalObject& aGlobal,
+                           const PropertyDefinition& aDefinition,
+                           ErrorResult& aRv) {
+  Document* doc = GetDocument(aGlobal);
+  if (!doc) {
+    return aRv.ThrowUnknownError("No document associated to this global?");
+  }
+  doc->EnsureStyleSet().RegisterProperty(aDefinition, aRv);
+}
+
+}  // namespace mozilla::dom