dom/animation/AnimationUtils.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "AnimationUtils.h"
   8
   9 #include "mozilla/dom/Animation.h"
  10 #include "mozilla/dom/Document.h"
  11 #include "mozilla/dom/KeyframeEffect.h"
  12 #include "mozilla/EffectSet.h"
  13 #include "nsDebug.h"
  14 #include "nsAtom.h"
  15 #include "nsIContent.h"
  16 #include "nsLayoutUtils.h"
  17 #include "nsGlobalWindowInner.h"
  18 #include "nsString.h"
  19 #include "xpcpublic.h"  // For xpc::NativeGlobal
  20
  21 using namespace mozilla::dom;
  22
  23 namespace mozilla {
  24
  25 /* static */
  26 void AnimationUtils::LogAsyncAnimationFailure(nsCString& aMessage,
  27                                               const nsIContent* aContent) {
  28   if (aContent) {
  29     aMessage.AppendLiteral(" [");
  30     aMessage.Append(nsAtomCString(aContent->NodeInfo()->NameAtom()));
  31
  32     nsAtom* id = aContent->GetID();
  33     if (id) {
  34       aMessage.AppendLiteral(" with id '");
  35       aMessage.Append(nsAtomCString(aContent->GetID()));
  36       aMessage.Append('\'');
  37     }
  38     aMessage.Append(']');
  39   }
  40   aMessage.Append('\n');
  41   printf_stderr("%s", aMessage.get());
  42 }
  43
  44 /* static */
  45 Document* AnimationUtils::GetCurrentRealmDocument(JSContext* aCx) {
  46   nsGlobalWindowInner* win = xpc::CurrentWindowOrNull(aCx);
  47   if (!win) {
  48     return nullptr;
  49   }
  50   return win->GetDoc();
  51 }
  52
  53 /* static */
  54 Document* AnimationUtils::GetDocumentFromGlobal(JSObject* aGlobalObject) {
  55   nsGlobalWindowInner* win = xpc::WindowOrNull(aGlobalObject);
  56   if (!win) {
  57     return nullptr;
  58   }
  59   return win->GetDoc();
  60 }
  61
  62 /* static */
  63 bool AnimationUtils::FrameHasAnimatedScale(const nsIFrame* aFrame) {
  64   EffectSet* effectSet = EffectSet::GetForFrame(
  65       aFrame, nsCSSPropertyIDSet::TransformLikeProperties());
  66   if (!effectSet) {
  67     return false;
  68   }
  69
  70   for (const dom::KeyframeEffect* effect : *effectSet) {
  71     if (effect->ContainsAnimatedScale(aFrame)) {
  72       return true;
  73     }
  74   }
  75
  76   return false;
  77 }
  78
  79 /* static */
  80 bool AnimationUtils::HasCurrentTransitions(const Element* aElement,
  81                                            PseudoStyleType aPseudoType) {
  82   MOZ_ASSERT(aElement);
  83
  84   EffectSet* effectSet = EffectSet::Get(aElement, aPseudoType);
  85   if (!effectSet) {
  86     return false;
  87   }
  88
  89   for (const dom::KeyframeEffect* effect : *effectSet) {
  90     // If |effect| is current, it must have an associated Animation
  91     // so we don't need to null-check the result of GetAnimation().
  92     if (effect->IsCurrent() && effect->GetAnimation()->AsCSSTransition()) {
  93       return true;
  94     }
  95   }
  96
  97   return false;
  98 }
  99
 100 /*static*/ Element* AnimationUtils::GetElementForRestyle(
 101     Element* aElement, PseudoStyleType aPseudoType) {
 102   if (aPseudoType == PseudoStyleType::NotPseudo) {
 103     return aElement;
 104   }
 105
 106   if (aPseudoType == PseudoStyleType::before) {
 107     return nsLayoutUtils::GetBeforePseudo(aElement);
 108   }
 109
 110   if (aPseudoType == PseudoStyleType::after) {
 111     return nsLayoutUtils::GetAfterPseudo(aElement);
 112   }
 113
 114   if (aPseudoType == PseudoStyleType::marker) {
 115     return nsLayoutUtils::GetMarkerPseudo(aElement);
 116   }
 117
 118   MOZ_ASSERT_UNREACHABLE(
 119       "Should not try to get the element to restyle for a pseudo other that "
 120       ":before, :after or ::marker");
 121   return nullptr;
 122 }
 123
 124 /*static*/ std::pair<const Element*, PseudoStyleType>
 125 AnimationUtils::GetElementPseudoPair(const Element* aElementOrPseudo) {
 126   MOZ_ASSERT(aElementOrPseudo);
 127
 128   if (aElementOrPseudo->IsGeneratedContentContainerForBefore()) {
 129     return {aElementOrPseudo->GetParent()->AsElement(),
 130             PseudoStyleType::before};
 131   }
 132
 133   if (aElementOrPseudo->IsGeneratedContentContainerForAfter()) {
 134     return {aElementOrPseudo->GetParent()->AsElement(), PseudoStyleType::after};
 135   }
 136
 137   if (aElementOrPseudo->IsGeneratedContentContainerForMarker()) {
 138     return {aElementOrPseudo->GetParent()->AsElement(),
 139             PseudoStyleType::marker};
 140   }
 141
 142   return {aElementOrPseudo, PseudoStyleType::NotPseudo};
 143 }
 144
 145 }  // namespace mozilla