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/* -*- 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 "mozilla/dom/HTMLAllCollection.h"
#include "mozilla/dom/HTMLAllCollectionBinding.h"
#include "mozilla/dom/Nullable.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/Element.h"
#include "nsContentList.h"
#include "nsGenericHTMLElement.h"
namespace mozilla {
namespace dom {
HTMLAllCollection::HTMLAllCollection(mozilla::dom::Document* aDocument)
: mDocument(aDocument) {
MOZ_ASSERT(mDocument);
}
HTMLAllCollection::~HTMLAllCollection() = default;
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(HTMLAllCollection, mDocument, mCollection,
mNamedMap)
NS_IMPL_CYCLE_COLLECTING_ADDREF(HTMLAllCollection)
NS_IMPL_CYCLE_COLLECTING_RELEASE(HTMLAllCollection)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(HTMLAllCollection)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
nsINode* HTMLAllCollection::GetParentObject() const { return mDocument; }
uint32_t HTMLAllCollection::Length() { return Collection()->Length(true); }
Element* HTMLAllCollection::Item(uint32_t aIndex) {
nsIContent* item = Collection()->Item(aIndex);
return item ? item->AsElement() : nullptr;
}
void HTMLAllCollection::Item(const Optional<nsAString>& aNameOrIndex,
Nullable<OwningHTMLCollectionOrElement>& aResult) {
if (!aNameOrIndex.WasPassed()) {
aResult.SetNull();
return;
}
const nsAString& nameOrIndex = aNameOrIndex.Value();
uint32_t indexVal;
if (js::StringIsArrayIndex(nameOrIndex.BeginReading(), nameOrIndex.Length(),
&indexVal)) {
Element* element = Item(indexVal);
if (element) {
aResult.SetValue().SetAsElement() = element;
} else {
aResult.SetNull();
}
return;
}
NamedItem(nameOrIndex, aResult);
}
nsContentList* HTMLAllCollection::Collection() {
if (!mCollection) {
Document* document = mDocument;
mCollection = document->GetElementsByTagName(u"*"_ns);
MOZ_ASSERT(mCollection);
}
return mCollection;
}
static bool IsAllNamedElement(nsIContent* aContent) {
return aContent->IsAnyOfHTMLElements(
nsGkAtoms::a, nsGkAtoms::button, nsGkAtoms::embed, nsGkAtoms::form,
nsGkAtoms::iframe, nsGkAtoms::img, nsGkAtoms::input, nsGkAtoms::map,
nsGkAtoms::meta, nsGkAtoms::object, nsGkAtoms::select,
nsGkAtoms::textarea, nsGkAtoms::frame, nsGkAtoms::frameset);
}
static bool DocAllResultMatch(Element* aElement, int32_t aNamespaceID,
nsAtom* aAtom, void* aData) {
if (aElement->GetID() == aAtom) {
return true;
}
nsGenericHTMLElement* elm = nsGenericHTMLElement::FromNode(aElement);
if (!elm) {
return false;
}
if (!IsAllNamedElement(elm)) {
return false;
}
const nsAttrValue* val = elm->GetParsedAttr(nsGkAtoms::name);
return val && val->Type() == nsAttrValue::eAtom &&
val->GetAtomValue() == aAtom;
}
nsContentList* HTMLAllCollection::GetDocumentAllList(const nsAString& aID) {
return mNamedMap.LookupForAdd(aID).OrInsert([this, &aID]() {
RefPtr<nsAtom> id = NS_Atomize(aID);
return new nsContentList(mDocument, DocAllResultMatch, nullptr, nullptr,
true, id);
});
}
void HTMLAllCollection::NamedGetter(
const nsAString& aID, bool& aFound,
Nullable<OwningHTMLCollectionOrElement>& aResult) {
if (aID.IsEmpty()) {
aFound = false;
aResult.SetNull();
return;
}
nsContentList* docAllList = GetDocumentAllList(aID);
if (!docAllList) {
aFound = false;
aResult.SetNull();
return;
}
// Check if there are more than 1 entries. Do this by getting the second one
// rather than the length since getting the length always requires walking
// the entire document.
if (docAllList->Item(1, true)) {
aFound = true;
aResult.SetValue().SetAsHTMLCollection() = docAllList;
return;
}
// There's only 0 or 1 items. Return the first one or null.
if (nsIContent* node = docAllList->Item(0, true)) {
aFound = true;
aResult.SetValue().SetAsElement() = node->AsElement();
return;
}
aFound = false;
aResult.SetNull();
}
void HTMLAllCollection::GetSupportedNames(nsTArray<nsString>& aNames) {
// XXXbz this is very similar to nsContentList::GetSupportedNames,
// but has to check IsAllNamedElement for the name case.
AutoTArray<nsAtom*, 8> atoms;
for (uint32_t i = 0; i < Length(); ++i) {
nsIContent* content = Item(i);
if (content->HasID()) {
nsAtom* id = content->GetID();
MOZ_ASSERT(id != nsGkAtoms::_empty, "Empty ids don't get atomized");
if (!atoms.Contains(id)) {
atoms.AppendElement(id);
}
}
nsGenericHTMLElement* el = nsGenericHTMLElement::FromNode(content);
if (el) {
// Note: nsINode::HasName means the name is exposed on the document,
// which is false for options, so we don't check it here.
const nsAttrValue* val = el->GetParsedAttr(nsGkAtoms::name);
if (val && val->Type() == nsAttrValue::eAtom &&
IsAllNamedElement(content)) {
nsAtom* name = val->GetAtomValue();
MOZ_ASSERT(name != nsGkAtoms::_empty, "Empty names don't get atomized");
if (!atoms.Contains(name)) {
atoms.AppendElement(name);
}
}
}
}
uint32_t atomsLen = atoms.Length();
nsString* names = aNames.AppendElements(atomsLen);
for (uint32_t i = 0; i < atomsLen; ++i) {
atoms[i]->ToString(names[i]);
}
}
JSObject* HTMLAllCollection::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return HTMLAllCollection_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla