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Diffstat (limited to '')
| -rw-r--r-- | dom/base/MutationObservers.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/dom/base/MutationObservers.h b/dom/base/MutationObservers.h new file mode 100644 index 0000000000..1ca86bdf43 --- /dev/null +++ b/dom/base/MutationObservers.h @@ -0,0 +1,150 @@ +/* -*- 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/. */ + +#ifndef DOM_BASE_MUTATIONOBSERVERS_H_ +#define DOM_BASE_MUTATIONOBSERVERS_H_ + +#include "mozilla/DoublyLinkedList.h" +#include "nsIContent.h" // for use in inline function (NotifyParentChainChanged) +#include "nsIMutationObserver.h" // for use in inline function (NotifyParentChainChanged) +#include "nsINode.h" + +class nsAtom; +class nsAttrValue; + +namespace mozilla::dom { +class Animation; +class Element; + +class MutationObservers { + public: + /** + * Send CharacterDataWillChange notifications to nsIMutationObservers. + * @param aContent Node whose data changed + * @param aInfo Struct with information details about the change + * @see nsIMutationObserver::CharacterDataWillChange + */ + static void NotifyCharacterDataWillChange(nsIContent* aContent, + const CharacterDataChangeInfo&); + + /** + * Send CharacterDataChanged notifications to nsIMutationObservers. + * @param aContent Node whose data changed + * @param aInfo Struct with information details about the change + * @see nsIMutationObserver::CharacterDataChanged + */ + static void NotifyCharacterDataChanged(nsIContent* aContent, + const CharacterDataChangeInfo&); + + /** + * Send AttributeWillChange notifications to nsIMutationObservers. + * @param aElement Element whose data will change + * @param aNameSpaceID Namespace of changing attribute + * @param aAttribute Local-name of changing attribute + * @param aModType Type of change (add/change/removal) + * @see nsIMutationObserver::AttributeWillChange + */ + static void NotifyAttributeWillChange(mozilla::dom::Element* aElement, + int32_t aNameSpaceID, + nsAtom* aAttribute, int32_t aModType); + + /** + * Send AttributeChanged notifications to nsIMutationObservers. + * @param aElement Element whose data changed + * @param aNameSpaceID Namespace of changed attribute + * @param aAttribute Local-name of changed attribute + * @param aModType Type of change (add/change/removal) + * @param aOldValue If the old value was StoresOwnData() (or absent), + * that value, otherwise null + * @see nsIMutationObserver::AttributeChanged + */ + static void NotifyAttributeChanged(mozilla::dom::Element* aElement, + int32_t aNameSpaceID, nsAtom* aAttribute, + int32_t aModType, + const nsAttrValue* aOldValue); + + /** + * Send AttributeSetToCurrentValue notifications to nsIMutationObservers. + * @param aElement Element whose data changed + * @param aNameSpaceID Namespace of the attribute + * @param aAttribute Local-name of the attribute + * @see nsIMutationObserver::AttributeSetToCurrentValue + */ + static void NotifyAttributeSetToCurrentValue(mozilla::dom::Element* aElement, + int32_t aNameSpaceID, + nsAtom* aAttribute); + + /** + * Send ContentAppended notifications to nsIMutationObservers + * @param aContainer Node into which new child/children were added + * @param aFirstNewContent First new child + * @see nsIMutationObserver::ContentAppended + */ + static void NotifyContentAppended(nsIContent* aContainer, + nsIContent* aFirstNewContent); + + /** + * Send ContentInserted notifications to nsIMutationObservers + * @param aContainer Node into which new child was inserted + * @param aChild Newly inserted child + * @see nsIMutationObserver::ContentInserted + */ + static void NotifyContentInserted(nsINode* aContainer, nsIContent* aChild); + /** + * Send ContentRemoved notifications to nsIMutationObservers + * @param aContainer Node from which child was removed + * @param aChild Removed child + * @param aPreviousSibling Previous sibling of the removed child + * @see nsIMutationObserver::ContentRemoved + */ + static void NotifyContentRemoved(nsINode* aContainer, nsIContent* aChild, + nsIContent* aPreviousSibling); + + /** + * Send ParentChainChanged notifications to nsIMutationObservers + * @param aContent The piece of content that had its parent changed. + * @see nsIMutationObserver::ParentChainChanged + */ + static inline void NotifyParentChainChanged(nsIContent* aContent) { + mozilla::SafeDoublyLinkedList<nsIMutationObserver>* observers = + aContent->GetMutationObservers(); + if (observers) { + for (auto iter = observers->begin(); iter != observers->end(); ++iter) { + if (iter->IsCallbackEnabled(nsIMutationObserver::kParentChainChanged)) { + iter->ParentChainChanged(aContent); + } + } + } + } + + static void NotifyARIAAttributeDefaultWillChange( + mozilla::dom::Element* aElement, nsAtom* aAttribute, int32_t aModType); + static void NotifyARIAAttributeDefaultChanged(mozilla::dom::Element* aElement, + nsAtom* aAttribute, + int32_t aModType); + + /** + * Notify that an animation is added/changed/removed. + * @param aAnimation The animation we added/changed/removed. + */ + static void NotifyAnimationAdded(mozilla::dom::Animation* aAnimation); + static void NotifyAnimationChanged(mozilla::dom::Animation* aAnimation); + static void NotifyAnimationRemoved(mozilla::dom::Animation* aAnimation); + + private: + enum class AnimationMutationType { Added, Changed, Removed }; + /** + * Notify the observers of the target of an animation + * @param aAnimation The mutated animation. + * @param aMutationType The mutation type of this animation. It could be + * Added, Changed, or Removed. + */ + static void NotifyAnimationMutated(mozilla::dom::Animation* aAnimation, + AnimationMutationType aMutatedType); +}; +} // namespace mozilla::dom + +#endif // DOM_BASE_MUTATIONOBSERVERS_H_ |