1 files changed, 110 insertions, 0 deletions
diff --git a/dom/animation/AnimValuesStyleRule.cpp b/dom/animation/AnimValuesStyleRule.cpp
new file mode 100644
index 000000000..dbdffd5b5
--- /dev/null
+++ b/dom/animation/AnimValuesStyleRule.cpp
@@ -0,0 +1,110 @@
+/* -*- 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/. */
+
+#include "AnimValuesStyleRule.h"
+#include "nsRuleData.h"
+#include "nsStyleContext.h"
+
+namespace mozilla {
+
+NS_IMPL_ISUPPORTS(AnimValuesStyleRule, nsIStyleRule)
+
+void
+AnimValuesStyleRule::MapRuleInfoInto(nsRuleData* aRuleData)
+{
+  nsStyleContext *contextParent = aRuleData->mStyleContext->GetParent();
+  if (contextParent && contextParent->HasPseudoElementData()) {
+    // Don't apply transitions or animations to things inside of
+    // pseudo-elements.
+    // FIXME (Bug 522599): Add tests for this.
+
+    // Prevent structs from being cached on the rule node since we're inside
+    // a pseudo-element, as we could determine cacheability differently
+    // when walking the rule tree for a style context that is not inside
+    // a pseudo-element.  Note that nsRuleNode::GetStyle##name_ and GetStyleData
+    // will never look at cached structs when we're animating things inside
+    // a pseduo-element, so that we don't incorrectly return a struct that
+    // is only appropriate for non-pseudo-elements.
+    aRuleData->mConditions.SetUncacheable();
+    return;
+  }
+
+  for (auto iter = mAnimationValues.ConstIter(); !iter.Done(); iter.Next()) {
+    nsCSSPropertyID property = static_cast<nsCSSPropertyID>(iter.Key());
+    if (aRuleData->mSIDs & nsCachedStyleData::GetBitForSID(
+                             nsCSSProps::kSIDTable[property])) {
+      nsCSSValue *prop = aRuleData->ValueFor(property);
+      if (prop->GetUnit() == eCSSUnit_Null) {
+        DebugOnly<bool> ok =
+          StyleAnimationValue::UncomputeValue(property, iter.Data(),
+                                              *prop);
+        MOZ_ASSERT(ok, "could not store computed value");
+      }
+    }
+  }
+}
+
+bool
+AnimValuesStyleRule::MightMapInheritedStyleData()
+{
+  return mStyleBits & NS_STYLE_INHERITED_STRUCT_MASK;
+}
+
+bool
+AnimValuesStyleRule::GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty,
+                                                   nsCSSValue* aValue)
+{
+  MOZ_ASSERT(false, "GetDiscretelyAnimatedCSSValue is not implemented yet");
+  return false;
+}
+
+void
+AnimValuesStyleRule::AddValue(nsCSSPropertyID aProperty,
+                              const StyleAnimationValue &aValue)
+{
+  MOZ_ASSERT(aProperty != eCSSProperty_UNKNOWN,
+             "Unexpected css property");
+  mAnimationValues.Put(aProperty, aValue);
+  mStyleBits |=
+    nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[aProperty]);
+}
+
+void
+AnimValuesStyleRule::AddValue(nsCSSPropertyID aProperty,
+                              StyleAnimationValue&& aValue)
+{
+  MOZ_ASSERT(aProperty != eCSSProperty_UNKNOWN,
+             "Unexpected css property");
+  mAnimationValues.Put(aProperty, Move(aValue));
+  mStyleBits |=
+    nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[aProperty]);
+}
+
+#ifdef DEBUG
+void
+AnimValuesStyleRule::List(FILE* out, int32_t aIndent) const
+{
+  nsAutoCString str;
+  for (int32_t index = aIndent; --index >= 0; ) {
+    str.AppendLiteral("  ");
+  }
+  str.AppendLiteral("[anim values] { ");
+  for (auto iter = mAnimationValues.ConstIter(); !iter.Done(); iter.Next()) {
+    nsCSSPropertyID property = static_cast<nsCSSPropertyID>(iter.Key());
+    str.Append(nsCSSProps::GetStringValue(property));
+    str.AppendLiteral(": ");
+    nsAutoString value;
+    Unused <<
+      StyleAnimationValue::UncomputeValue(property, iter.Data(), value);
+    AppendUTF16toUTF8(value, str);
+    str.AppendLiteral("; ");
+  }
+  str.AppendLiteral("}\n");
+  fprintf_stderr(out, "%s", str.get());
+}
+#endif
+
+} // namespace mozilla