1 files changed, 131 insertions, 0 deletions
diff --git a/layout/style/nsCSSPseudoClasses.cpp b/layout/style/nsCSSPseudoClasses.cpp
new file mode 100644
index 000000000..9b26459dd
--- /dev/null
+++ b/layout/style/nsCSSPseudoClasses.cpp
@@ -0,0 +1,131 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+/* atom list for CSS pseudo-classes */
+
+#include "mozilla/ArrayUtils.h"
+
+#include "nsCSSPseudoClasses.h"
+#include "nsStaticAtom.h"
+#include "mozilla/Preferences.h"
+#include "nsString.h"
+
+using namespace mozilla;
+
+// define storage for all atoms
+#define CSS_PSEUDO_CLASS(_name, _value, _flags, _pref) \
+  static nsIAtom* sPseudoClass_##_name;
+#include "nsCSSPseudoClassList.h"
+#undef CSS_PSEUDO_CLASS
+
+#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
+  NS_STATIC_ATOM_BUFFER(name_##_pseudo_class_buffer, value_)
+#include "nsCSSPseudoClassList.h"
+#undef CSS_PSEUDO_CLASS
+
+#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
+  static_assert(!((flags_) & CSS_PSEUDO_CLASS_ENABLED_IN_CHROME) || \
+                ((flags_) & CSS_PSEUDO_CLASS_ENABLED_IN_UA_SHEETS), \
+                "Pseudo-class '" #name_ "' is enabled in chrome, so it " \
+                "should also be enabled in UA sheets");
+#include "nsCSSPseudoClassList.h"
+#undef CSS_PSEUDO_CLASS
+
+// Array of nsStaticAtom for each of the pseudo-classes.
+static const nsStaticAtom CSSPseudoClasses_info[] = {
+#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
+  NS_STATIC_ATOM(name_##_pseudo_class_buffer, &sPseudoClass_##name_),
+#include "nsCSSPseudoClassList.h"
+#undef CSS_PSEUDO_CLASS
+};
+
+// Flags data for each of the pseudo-classes, which must be separate
+// from the previous array since there's no place for it in
+// nsStaticAtom.
+/* static */ const uint32_t
+nsCSSPseudoClasses::kPseudoClassFlags[] = {
+#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
+  flags_,
+#include "nsCSSPseudoClassList.h"
+#undef CSS_PSEUDO_CLASS
+};
+
+/* static */ bool
+nsCSSPseudoClasses::sPseudoClassEnabled[] = {
+// If the pseudo class has any "ENABLED_IN" flag set, it is disabled by
+// default. Note that, if a pseudo class has pref, whatever its default
+// value is, it'll later be changed in nsCSSPseudoClasses::AddRefAtoms()
+// If the pseudo class has "ENABLED_IN" flags but doesn't have a pref,
+// it is an internal pseudo class which is disabled elsewhere.
+#define IS_ENABLED_BY_DEFAULT(flags_) \
+  (!((flags_) & CSS_PSEUDO_CLASS_ENABLED_MASK))
+#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
+  IS_ENABLED_BY_DEFAULT(flags_),
+#include "nsCSSPseudoClassList.h"
+#undef CSS_PSEUDO_CLASS
+#undef IS_ENABLED_BY_DEFAULT
+};
+
+void nsCSSPseudoClasses::AddRefAtoms()
+{
+  NS_RegisterStaticAtoms(CSSPseudoClasses_info);
+
+#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_)                        \
+  if (pref_[0]) {                                                             \
+    auto idx = static_cast<CSSPseudoElementTypeBase>(Type::name_);            \
+    Preferences::AddBoolVarCache(&sPseudoClassEnabled[idx], pref_);           \
+  }
+#include "nsCSSPseudoClassList.h"
+#undef CSS_PSEUDO_CLASS
+}
+
+bool
+nsCSSPseudoClasses::HasStringArg(Type aType)
+{
+  return aType == Type::lang ||
+         aType == Type::mozEmptyExceptChildrenWithLocalname ||
+         aType == Type::mozSystemMetric ||
+         aType == Type::mozLocaleDir ||
+         aType == Type::mozDir ||
+         aType == Type::dir;
+}
+
+bool
+nsCSSPseudoClasses::HasNthPairArg(Type aType)
+{
+  return aType == Type::nthChild ||
+         aType == Type::nthLastChild ||
+         aType == Type::nthOfType ||
+         aType == Type::nthLastOfType;
+}
+
+void
+nsCSSPseudoClasses::PseudoTypeToString(Type aType, nsAString& aString)
+{
+  MOZ_ASSERT(aType < Type::Count, "Unexpected type");
+  auto idx = static_cast<CSSPseudoClassTypeBase>(aType);
+  (*CSSPseudoClasses_info[idx].mAtom)->ToString(aString);
+}
+
+/* static */ CSSPseudoClassType
+nsCSSPseudoClasses::GetPseudoType(nsIAtom* aAtom, EnabledState aEnabledState)
+{
+  for (uint32_t i = 0; i < ArrayLength(CSSPseudoClasses_info); ++i) {
+    if (*CSSPseudoClasses_info[i].mAtom == aAtom) {
+      Type type = Type(i);
+      return IsEnabled(type, aEnabledState) ? type : Type::NotPseudo;
+    }
+  }
+  return Type::NotPseudo;
+}
+
+/* static */ bool
+nsCSSPseudoClasses::IsUserActionPseudoClass(Type aType)
+{
+  // See http://dev.w3.org/csswg/selectors4/#useraction-pseudos
+  return aType == Type::hover ||
+         aType == Type::active ||
+         aType == Type::focus;
+}