forked from mirrors/gecko-dev
132 lines
4.5 KiB
C++
132 lines
4.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_HTMLFormControlsCollection_h
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#define mozilla_dom_HTMLFormControlsCollection_h
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#include "mozilla/dom/Element.h" // DOMProxyHandler::getOwnPropertyDescriptor
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#include "nsIHTMLCollection.h"
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#include "nsInterfaceHashtable.h"
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#include "nsTArray.h"
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#include "nsWrapperCache.h"
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class nsGenericHTMLFormElement;
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class nsIFormControl;
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template <class T>
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class RefPtr;
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namespace mozilla {
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namespace dom {
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class HTMLFormElement;
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class HTMLImageElement;
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class OwningRadioNodeListOrElement;
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template<typename> struct Nullable;
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class HTMLFormControlsCollection final : public nsIHTMLCollection
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, public nsWrapperCache
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{
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public:
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explicit HTMLFormControlsCollection(HTMLFormElement* aForm);
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void DropFormReference();
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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// nsIDOMHTMLCollection interface
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NS_DECL_NSIDOMHTMLCOLLECTION
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virtual Element* GetElementAt(uint32_t index) override;
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virtual nsINode* GetParentObject() override;
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virtual Element*
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GetFirstNamedElement(const nsAString& aName, bool& aFound) override;
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void
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NamedGetter(const nsAString& aName,
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bool& aFound,
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Nullable<OwningRadioNodeListOrElement>& aResult);
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void
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NamedItem(const nsAString& aName,
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Nullable<OwningRadioNodeListOrElement>& aResult)
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{
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bool dummy;
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NamedGetter(aName, dummy, aResult);
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}
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virtual void GetSupportedNames(nsTArray<nsString>& aNames) override;
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nsresult AddElementToTable(nsGenericHTMLFormElement* aChild,
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const nsAString& aName);
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nsresult AddImageElementToTable(HTMLImageElement* aChild,
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const nsAString& aName);
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nsresult RemoveElementFromTable(nsGenericHTMLFormElement* aChild,
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const nsAString& aName);
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nsresult IndexOfControl(nsIFormControl* aControl,
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int32_t* aIndex);
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nsISupports* NamedItemInternal(const nsAString& aName, bool aFlushContent);
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/**
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* Create a sorted list of form control elements. This list is sorted
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* in document order and contains the controls in the mElements and
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* mNotInElements list. This function does not add references to the
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* elements.
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*
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* @param aControls The list of sorted controls[out].
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* @return NS_OK or NS_ERROR_OUT_OF_MEMORY.
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*/
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nsresult GetSortedControls(nsTArray<RefPtr<nsGenericHTMLFormElement>>& aControls) const;
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// nsWrapperCache
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using nsWrapperCache::GetWrapperPreserveColor;
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using nsWrapperCache::PreserveWrapper;
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virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
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protected:
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virtual ~HTMLFormControlsCollection();
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virtual JSObject* GetWrapperPreserveColorInternal() override
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{
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return nsWrapperCache::GetWrapperPreserveColor();
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}
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virtual void PreserveWrapperInternal(nsISupports* aScriptObjectHolder) override
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{
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nsWrapperCache::PreserveWrapper(aScriptObjectHolder);
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}
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public:
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static bool ShouldBeInElements(nsIFormControl* aFormControl);
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HTMLFormElement* mForm; // WEAK - the form owns me
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nsTArray<nsGenericHTMLFormElement*> mElements; // Holds WEAK references - bug 36639
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// This array holds on to all form controls that are not contained
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// in mElements (form.elements in JS, see ShouldBeInFormControl()).
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// This is needed to properly clean up the bi-directional references
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// (both weak and strong) between the form and its form controls.
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nsTArray<nsGenericHTMLFormElement*> mNotInElements; // Holds WEAK references
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(HTMLFormControlsCollection)
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protected:
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// Drop all our references to the form elements
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void Clear();
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// Flush out the content model so it's up to date.
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void FlushPendingNotifications();
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// A map from an ID or NAME attribute to the form control(s), this
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// hash holds strong references either to the named form control, or
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// to a list of named form controls, in the case where this hash
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// holds on to a list of named form controls the list has weak
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// references to the form control.
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nsInterfaceHashtable<nsStringHashKey,nsISupports> mNameLookupTable;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_HTMLFormControlsCollection_h
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