diff options
Diffstat (limited to 'layout/forms/ListMutationObserver.cpp')
-rw-r--r-- | layout/forms/ListMutationObserver.cpp | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/layout/forms/ListMutationObserver.cpp b/layout/forms/ListMutationObserver.cpp new file mode 100644 index 0000000000..13f9e367a0 --- /dev/null +++ b/layout/forms/ListMutationObserver.cpp @@ -0,0 +1,92 @@ +/* -*- 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 "ListMutationObserver.h" + +#include "mozilla/dom/HTMLInputElement.h" +#include "nsIFrame.h" + +namespace mozilla { +NS_IMPL_ISUPPORTS(ListMutationObserver, nsIMutationObserver) + +ListMutationObserver::~ListMutationObserver() = default; + +void ListMutationObserver::Attach(bool aRepaint) { + nsAutoString id; + if (InputElement().GetAttr(nsGkAtoms::list_, id)) { + Unlink(); + RefPtr<nsAtom> idAtom = NS_AtomizeMainThread(id); + ResetWithID(InputElement(), idAtom); + AddObserverIfNeeded(); + } + if (aRepaint) { + mOwningElementFrame->InvalidateFrame(); + } +} + +void ListMutationObserver::AddObserverIfNeeded() { + if (auto* list = get()) { + if (list->IsHTMLElement(nsGkAtoms::datalist)) { + list->AddMutationObserver(this); + } + } +} + +void ListMutationObserver::RemoveObserverIfNeeded(dom::Element* aList) { + if (aList && aList->IsHTMLElement(nsGkAtoms::datalist)) { + aList->RemoveMutationObserver(this); + } +} + +void ListMutationObserver::Detach() { + RemoveObserverIfNeeded(); + Unlink(); +} + +dom::HTMLInputElement& ListMutationObserver::InputElement() const { + MOZ_ASSERT(mOwningElementFrame->GetContent()->IsHTMLElement(nsGkAtoms::input), + "bad cast"); + return *static_cast<dom::HTMLInputElement*>( + mOwningElementFrame->GetContent()); +} + +void ListMutationObserver::AttributeChanged(dom::Element* aElement, + int32_t aNameSpaceID, + nsAtom* aAttribute, + int32_t aModType, + const nsAttrValue* aOldValue) { + if (aAttribute == nsGkAtoms::value && aNameSpaceID == kNameSpaceID_None && + aElement->IsHTMLElement(nsGkAtoms::option)) { + mOwningElementFrame->InvalidateFrame(); + } +} + +void ListMutationObserver::CharacterDataChanged( + nsIContent* aContent, const CharacterDataChangeInfo& aInfo) { + mOwningElementFrame->InvalidateFrame(); +} + +void ListMutationObserver::ContentAppended(nsIContent* aFirstNewContent) { + mOwningElementFrame->InvalidateFrame(); +} + +void ListMutationObserver::ContentInserted(nsIContent* aChild) { + mOwningElementFrame->InvalidateFrame(); +} + +void ListMutationObserver::ContentRemoved(nsIContent* aChild, + nsIContent* aPreviousSibling) { + mOwningElementFrame->InvalidateFrame(); +} + +void ListMutationObserver::ElementChanged(dom::Element* aFrom, + dom::Element* aTo) { + IDTracker::ElementChanged(aFrom, aTo); + RemoveObserverIfNeeded(aFrom); + AddObserverIfNeeded(); + mOwningElementFrame->InvalidateFrame(); +} + +} // namespace mozilla |