1 files changed, 145 insertions, 0 deletions
diff --git a/dom/animation/AnimationUtils.cpp b/dom/animation/AnimationUtils.cpp
new file mode 100644
index 0000000000..8d00d9ebcf
--- /dev/null
+++ b/dom/animation/AnimationUtils.cpp
@@ -0,0 +1,145 @@
+/* -*- 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 "AnimationUtils.h"
+
+#include "mozilla/dom/Animation.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/KeyframeEffect.h"
+#include "mozilla/EffectSet.h"
+#include "nsDebug.h"
+#include "nsAtom.h"
+#include "nsIContent.h"
+#include "nsLayoutUtils.h"
+#include "nsGlobalWindow.h"
+#include "nsString.h"
+#include "xpcpublic.h"  // For xpc::NativeGlobal
+
+using namespace mozilla::dom;
+
+namespace mozilla {
+
+/* static */
+void AnimationUtils::LogAsyncAnimationFailure(nsCString& aMessage,
+                                              const nsIContent* aContent) {
+  if (aContent) {
+    aMessage.AppendLiteral(" [");
+    aMessage.Append(nsAtomCString(aContent->NodeInfo()->NameAtom()));
+
+    nsAtom* id = aContent->GetID();
+    if (id) {
+      aMessage.AppendLiteral(" with id '");
+      aMessage.Append(nsAtomCString(aContent->GetID()));
+      aMessage.Append('\'');
+    }
+    aMessage.Append(']');
+  }
+  aMessage.Append('\n');
+  printf_stderr("%s", aMessage.get());
+}
+
+/* static */
+Document* AnimationUtils::GetCurrentRealmDocument(JSContext* aCx) {
+  nsGlobalWindowInner* win = xpc::CurrentWindowOrNull(aCx);
+  if (!win) {
+    return nullptr;
+  }
+  return win->GetDoc();
+}
+
+/* static */
+Document* AnimationUtils::GetDocumentFromGlobal(JSObject* aGlobalObject) {
+  nsGlobalWindowInner* win = xpc::WindowOrNull(aGlobalObject);
+  if (!win) {
+    return nullptr;
+  }
+  return win->GetDoc();
+}
+
+/* static */
+bool AnimationUtils::FrameHasAnimatedScale(const nsIFrame* aFrame) {
+  EffectSet* effectSet = EffectSet::GetForFrame(
+      aFrame, nsCSSPropertyIDSet::TransformLikeProperties());
+  if (!effectSet) {
+    return false;
+  }
+
+  for (const dom::KeyframeEffect* effect : *effectSet) {
+    if (effect->ContainsAnimatedScale(aFrame)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+/* static */
+bool AnimationUtils::HasCurrentTransitions(const Element* aElement,
+                                           PseudoStyleType aPseudoType) {
+  MOZ_ASSERT(aElement);
+
+  EffectSet* effectSet = EffectSet::Get(aElement, aPseudoType);
+  if (!effectSet) {
+    return false;
+  }
+
+  for (const dom::KeyframeEffect* effect : *effectSet) {
+    // If |effect| is current, it must have an associated Animation
+    // so we don't need to null-check the result of GetAnimation().
+    if (effect->IsCurrent() && effect->GetAnimation()->AsCSSTransition()) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+/*static*/ Element* AnimationUtils::GetElementForRestyle(
+    Element* aElement, PseudoStyleType aPseudoType) {
+  if (aPseudoType == PseudoStyleType::NotPseudo) {
+    return aElement;
+  }
+
+  if (aPseudoType == PseudoStyleType::before) {
+    return nsLayoutUtils::GetBeforePseudo(aElement);
+  }
+
+  if (aPseudoType == PseudoStyleType::after) {
+    return nsLayoutUtils::GetAfterPseudo(aElement);
+  }
+
+  if (aPseudoType == PseudoStyleType::marker) {
+    return nsLayoutUtils::GetMarkerPseudo(aElement);
+  }
+
+  MOZ_ASSERT_UNREACHABLE(
+      "Should not try to get the element to restyle for a pseudo other that "
+      ":before, :after or ::marker");
+  return nullptr;
+}
+
+/*static*/ std::pair<const Element*, PseudoStyleType>
+AnimationUtils::GetElementPseudoPair(const Element* aElementOrPseudo) {
+  MOZ_ASSERT(aElementOrPseudo);
+
+  if (aElementOrPseudo->IsGeneratedContentContainerForBefore()) {
+    return {aElementOrPseudo->GetParent()->AsElement(),
+            PseudoStyleType::before};
+  }
+
+  if (aElementOrPseudo->IsGeneratedContentContainerForAfter()) {
+    return {aElementOrPseudo->GetParent()->AsElement(), PseudoStyleType::after};
+  }
+
+  if (aElementOrPseudo->IsGeneratedContentContainerForMarker()) {
+    return {aElementOrPseudo->GetParent()->AsElement(),
+            PseudoStyleType::marker};
+  }
+
+  return {aElementOrPseudo, PseudoStyleType::NotPseudo};
+}
+
+}  // namespace mozilla