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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 */
#ifndef mozilla_dom_HTMLOptionsCollection_h
#define mozilla_dom_HTMLOptionsCollection_h
#include "mozilla/Attributes.h"
#include "nsIHTMLCollection.h"
#include "nsWrapperCache.h"
#include "mozilla/dom/HTMLOptionElement.h"
#include "mozilla/ErrorResult.h"
#include "nsCOMPtr.h"
#include "nsError.h"
#include "nsGenericHTMLElement.h"
#include "nsTArray.h"
namespace mozilla {
namespace dom {
class DocGroup;
class HTMLElementOrLong;
class HTMLOptionElementOrHTMLOptGroupElement;
class HTMLSelectElement;
* The collection of options in the select (what you get back when you do
* select.options in DOM)
class HTMLOptionsCollection final : public nsIHTMLCollection,
public nsWrapperCache {
typedef HTMLOptionElementOrHTMLOptGroupElement HTMLOptionOrOptGroupElement;
explicit HTMLOptionsCollection(HTMLSelectElement* aSelect);
// nsWrapperCache
using nsWrapperCache::GetWrapper;
using nsWrapperCache::GetWrapperPreserveColor;
using nsWrapperCache::PreserveWrapper;
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
virtual ~HTMLOptionsCollection() = default;
virtual JSObject* GetWrapperPreserveColorInternal() override {
return nsWrapperCache::GetWrapperPreserveColor();
virtual void PreserveWrapperInternal(
nsISupports* aScriptObjectHolder) override {
virtual uint32_t Length() override;
virtual Element* GetElementAt(uint32_t aIndex) override;
virtual nsINode* GetParentObject() override;
DocGroup* GetDocGroup() const;
// Helpers for HTMLSelectElement
* Insert an option
* @param aOption the option to insert
* @param aIndex the index to insert at
void InsertOptionAt(mozilla::dom::HTMLOptionElement* aOption,
uint32_t aIndex) {
mElements.InsertElementAt(aIndex, aOption);
* Remove an option
* @param aIndex the index of the option to remove
void RemoveOptionAt(uint32_t aIndex) { mElements.RemoveElementAt(aIndex); }
* Get the option at the index
* @param aIndex the index
* @param aReturn the option returned [OUT]
mozilla::dom::HTMLOptionElement* ItemAsOption(uint32_t aIndex) {
return mElements.SafeElementAt(aIndex, nullptr);
* Clears out all options
void Clear() { mElements.Clear(); }
* Append an option to end of array
void AppendOption(mozilla::dom::HTMLOptionElement* aOption) {
* Finds the index of a given option element.
* If the option isn't part of the collection, return NS_ERROR_FAILURE
* without setting aIndex.
* @param aOption the option to get the index of
* @param aStartIndex the index to start looking at
* @param aForward TRUE to look forward, FALSE to look backward
* @return the option index
nsresult GetOptionIndex(Element* aOption, int32_t aStartIndex, bool aForward,
int32_t* aIndex);
HTMLOptionElement* GetNamedItem(const nsAString& aName) {
bool dummy;
return NamedGetter(aName, dummy);
HTMLOptionElement* NamedGetter(const nsAString& aName, bool& aFound);
virtual Element* GetFirstNamedElement(const nsAString& aName,
bool& aFound) override {
return NamedGetter(aName, aFound);
void Add(const HTMLOptionOrOptGroupElement& aElement,
const Nullable<HTMLElementOrLong>& aBefore, ErrorResult& aError);
void Remove(int32_t aIndex);
int32_t SelectedIndex();
void SetSelectedIndex(int32_t aSelectedIndex);
void IndexedSetter(uint32_t aIndex, HTMLOptionElement* aOption,
ErrorResult& aError);
virtual void GetSupportedNames(nsTArray<nsString>& aNames) override;
void SetLength(uint32_t aLength, ErrorResult& aError);
/** The list of options (holds strong references). This is infallible, so
* various members such as InsertOptionAt are also infallible. */
nsTArray<RefPtr<mozilla::dom::HTMLOptionElement> > mElements;
/** The select element that contains this array */
RefPtr<HTMLSelectElement> mSelect;
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_HTMLOptionsCollection_h