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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/. */
#ifndef mozilla_dom_HTMLFormControlsCollection_h
#define mozilla_dom_HTMLFormControlsCollection_h
#include "mozilla/dom/Element.h" // DOMProxyHandler::getOwnPropertyDescriptor
#include "nsIHTMLCollection.h"
#include "nsInterfaceHashtable.h"
#include "nsTArray.h"
#include "nsWrapperCache.h"
class nsGenericHTMLFormElement;
class nsIFormControl;
template <class T>
class RefPtr;
namespace mozilla {
namespace dom {
class HTMLFormElement;
class HTMLImageElement;
class OwningRadioNodeListOrElement;
template <typename>
struct Nullable;
class HTMLFormControlsCollection final : public nsIHTMLCollection,
public nsWrapperCache {
public:
explicit HTMLFormControlsCollection(HTMLFormElement* aForm);
void DropFormReference();
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
virtual uint32_t Length() override;
virtual Element* GetElementAt(uint32_t index) override;
virtual nsINode* GetParentObject() override;
virtual Element* GetFirstNamedElement(const nsAString& aName,
bool& aFound) override;
void NamedGetter(const nsAString& aName, bool& aFound,
Nullable<OwningRadioNodeListOrElement>& aResult);
void NamedItem(const nsAString& aName,
Nullable<OwningRadioNodeListOrElement>& aResult) {
bool dummy;
NamedGetter(aName, dummy, aResult);
}
virtual void GetSupportedNames(nsTArray<nsString>& aNames) override;
nsresult AddElementToTable(nsGenericHTMLFormElement* aChild,
const nsAString& aName);
nsresult AddImageElementToTable(HTMLImageElement* aChild,
const nsAString& aName);
nsresult RemoveElementFromTable(nsGenericHTMLFormElement* aChild,
const nsAString& aName);
nsresult IndexOfControl(nsIFormControl* aControl, int32_t* aIndex);
nsISupports* NamedItemInternal(const nsAString& aName, bool aFlushContent);
/**
* Create a sorted list of form control elements. This list is sorted
* in document order and contains the controls in the mElements and
* mNotInElements list. This function does not add references to the
* elements.
*
* @param aControls The list of sorted controls[out].
* @return NS_OK or NS_ERROR_OUT_OF_MEMORY.
*/
nsresult GetSortedControls(
nsTArray<RefPtr<nsGenericHTMLFormElement>>& aControls) const;
// nsWrapperCache
using nsWrapperCache::GetWrapperPreserveColor;
using nsWrapperCache::PreserveWrapper;
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
protected:
virtual ~HTMLFormControlsCollection();
virtual JSObject* GetWrapperPreserveColorInternal() override {
return nsWrapperCache::GetWrapperPreserveColor();
}
virtual void PreserveWrapperInternal(
nsISupports* aScriptObjectHolder) override {
nsWrapperCache::PreserveWrapper(aScriptObjectHolder);
}
public:
static bool ShouldBeInElements(nsIFormControl* aFormControl);
HTMLFormElement* mForm; // WEAK - the form owns me
nsTArray<nsGenericHTMLFormElement*>
mElements; // Holds WEAK references - bug 36639
// This array holds on to all form controls that are not contained
// in mElements (form.elements in JS, see ShouldBeInFormControl()).
// This is needed to properly clean up the bi-directional references
// (both weak and strong) between the form and its form controls.
nsTArray<nsGenericHTMLFormElement*> mNotInElements; // Holds WEAK references
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(HTMLFormControlsCollection)
protected:
// Drop all our references to the form elements
void Clear();
// Flush out the content model so it's up to date.
void FlushPendingNotifications();
// A map from an ID or NAME attribute to the form control(s), this
// hash holds strong references either to the named form control, or
// to a list of named form controls, in the case where this hash
// holds on to a list of named form controls the list has weak
// references to the form control.
nsInterfaceHashtable<nsStringHashKey, nsISupports> mNameLookupTable;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_HTMLFormControlsCollection_h