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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 */
* interface for rendering objects that manually create subtrees of
* anonymous content
#ifndef nsIAnonymousContentCreator_h___
#define nsIAnonymousContentCreator_h___
#include "mozilla/AnonymousContentKey.h"
#include "nsQueryFrame.h"
#include "nsTArrayForwardDeclare.h"
#include "X11UndefineNone.h"
class nsIContent;
* Any source for anonymous content can implement this interface to provide it.
* HTML frames like nsFileControlFrame currently use this.
* @see nsCSSFrameConstructor
class nsIAnonymousContentCreator {
struct ContentInfo {
explicit ContentInfo(
nsIContent* aContent,
mozilla::AnonymousContentKey aKey = mozilla::AnonymousContentKey::None)
: mContent(aContent), mKey(aKey) {}
nsIContent* mContent;
mozilla::AnonymousContentKey mKey;
* Creates "native" anonymous content and adds the created content to
* the aElements array. None of the returned elements can be nullptr.
* If the anonymous content creator sets the editable flag on some
* of the elements that it creates, the flag will be applied to the node
* upon being bound to the document.
* @note The returned elements are owned by this object. This object is
* responsible for calling UnbindFromTree on the elements it returned
* from CreateAnonymousContent when appropriate (i.e. before releasing
* them).
virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) = 0;
* Appends "native" anonymous children created by CreateAnonymousContent()
* to the given content list depending on the filter.
* @see nsIContent::GetChildren for set of values used for filter. Currently,
* eSkipPlaceholderContent is the only flag that any implementation of
* this method heeds.
virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
uint32_t aFilter) = 0;