mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-10 11:54:40 +00:00
112 lines
3.5 KiB
C
112 lines
3.5 KiB
C
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
||
|
/* vim: set ts=4 et sw=4 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/. */
|
||
|
|
||
|
/*
|
||
|
* Implementation of DOM Traversal's nsIDOMTreeWalker
|
||
|
*/
|
||
|
|
||
|
#ifndef mozilla_dom_TreeWalker_h
|
||
|
#define mozilla_dom_TreeWalker_h
|
||
|
|
||
|
#include "nsIDOMTreeWalker.h"
|
||
|
#include "nsTraversal.h"
|
||
|
#include "nsCOMPtr.h"
|
||
|
#include "nsTArray.h"
|
||
|
#include "nsCycleCollectionParticipant.h"
|
||
|
|
||
|
class nsINode;
|
||
|
class nsIDOMNode;
|
||
|
|
||
|
namespace mozilla {
|
||
|
namespace dom {
|
||
|
|
||
|
class TreeWalker final : public nsIDOMTreeWalker, public nsTraversal
|
||
|
{
|
||
|
virtual ~TreeWalker();
|
||
|
|
||
|
public:
|
||
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
||
|
NS_DECL_NSIDOMTREEWALKER
|
||
|
|
||
|
TreeWalker(nsINode *aRoot,
|
||
|
uint32_t aWhatToShow,
|
||
|
const NodeFilterHolder &aFilter);
|
||
|
|
||
|
NS_DECL_CYCLE_COLLECTION_CLASS(TreeWalker)
|
||
|
|
||
|
// WebIDL API
|
||
|
nsINode* Root() const
|
||
|
{
|
||
|
return mRoot;
|
||
|
}
|
||
|
uint32_t WhatToShow() const
|
||
|
{
|
||
|
return mWhatToShow;
|
||
|
}
|
||
|
already_AddRefed<NodeFilter> GetFilter()
|
||
|
{
|
||
|
return mFilter.ToWebIDLCallback();
|
||
|
}
|
||
|
nsINode* CurrentNode() const
|
||
|
{
|
||
|
return mCurrentNode;
|
||
|
}
|
||
|
void SetCurrentNode(nsINode& aNode, ErrorResult& aResult);
|
||
|
// All our traversal methods return strong refs because filtering can
|
||
|
// remove nodes from the tree.
|
||
|
already_AddRefed<nsINode> ParentNode(ErrorResult& aResult);
|
||
|
already_AddRefed<nsINode> FirstChild(ErrorResult& aResult);
|
||
|
already_AddRefed<nsINode> LastChild(ErrorResult& aResult);
|
||
|
already_AddRefed<nsINode> PreviousSibling(ErrorResult& aResult);
|
||
|
already_AddRefed<nsINode> NextSibling(ErrorResult& aResult);
|
||
|
already_AddRefed<nsINode> PreviousNode(ErrorResult& aResult);
|
||
|
already_AddRefed<nsINode> NextNode(ErrorResult& aResult);
|
||
|
|
||
|
bool WrapObject(JSContext *aCx, JS::Handle<JSObject*> aGivenProto, JS::MutableHandle<JSObject*> aReflector);
|
||
|
|
||
|
private:
|
||
|
nsCOMPtr<nsINode> mCurrentNode;
|
||
|
|
||
|
/*
|
||
|
* Implements FirstChild and LastChild which only vary in which direction
|
||
|
* they search.
|
||
|
* @param aReversed Controls whether we search forwards or backwards
|
||
|
* @param aResult Whether we threw or not.
|
||
|
* @returns The desired node. Null if no child is found
|
||
|
*/
|
||
|
already_AddRefed<nsINode> FirstChildInternal(bool aReversed,
|
||
|
ErrorResult& aResult);
|
||
|
|
||
|
/*
|
||
|
* Implements NextSibling and PreviousSibling which only vary in which
|
||
|
* direction they search.
|
||
|
* @param aReversed Controls whether we search forwards or backwards
|
||
|
* @param aResult Whether we threw or not.
|
||
|
* @returns The desired node. Null if no child is found
|
||
|
*/
|
||
|
already_AddRefed<nsINode> NextSiblingInternal(bool aReversed,
|
||
|
ErrorResult& aResult);
|
||
|
|
||
|
// Implementation for our various XPCOM getters
|
||
|
typedef already_AddRefed<nsINode> (TreeWalker::*NodeGetter)(ErrorResult&);
|
||
|
inline nsresult ImplNodeGetter(NodeGetter aGetter, nsIDOMNode** aRetval)
|
||
|
{
|
||
|
mozilla::ErrorResult rv;
|
||
|
nsCOMPtr<nsINode> node = (this->*aGetter)(rv);
|
||
|
if (rv.Failed()) {
|
||
|
return rv.StealNSResult();
|
||
|
}
|
||
|
*aRetval = node ? node.forget().take()->AsDOMNode() : nullptr;
|
||
|
return NS_OK;
|
||
|
}
|
||
|
};
|
||
|
|
||
|
} // namespace dom
|
||
|
} // namespace mozilla
|
||
|
|
||
|
#endif // mozilla_dom_TreeWalker_h
|
||
|
|