mirror of
https://github.com/classilla/tenfourfox.git
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210 lines
5.9 KiB
C++
210 lines
5.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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_XPathResult_h
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#define mozilla_dom_XPathResult_h
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#include "nsStubMutationObserver.h"
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#include "nsAutoPtr.h"
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#include "nsCOMPtr.h"
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#include "nsCOMArray.h"
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#include "nsWeakPtr.h"
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#include "nsCycleCollectionParticipant.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/ErrorResult.h"
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#include "nsString.h"
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#include "nsWrapperCache.h"
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#include "nsINode.h"
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class nsIDocument;
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class txAExprResult;
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// {662f2c9a-c7cd-4cab-9349-e733df5a838c}
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#define NS_IXPATHRESULT_IID \
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{ 0x662f2c9a, 0xc7cd, 0x4cab, {0x93, 0x49, 0xe7, 0x33, 0xdf, 0x5a, 0x83, 0x8c }}
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class nsIXPathResult : public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IXPATHRESULT_IID)
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virtual nsresult SetExprResult(txAExprResult *aExprResult,
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uint16_t aResultType,
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nsINode* aContextNode) = 0;
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virtual nsresult GetExprResult(txAExprResult **aExprResult) = 0;
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virtual nsresult Clone(nsIXPathResult **aResult) = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIXPathResult, NS_IXPATHRESULT_IID)
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namespace mozilla {
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namespace dom {
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/**
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* A class for evaluating an XPath expression string
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*/
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class XPathResult final : public nsIXPathResult,
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public nsStubMutationObserver,
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public nsWrapperCache
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{
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~XPathResult();
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public:
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explicit XPathResult(nsINode* aParent);
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XPathResult(const XPathResult &aResult);
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enum {
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ANY_TYPE = 0U,
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NUMBER_TYPE = 1U,
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STRING_TYPE = 2U,
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BOOLEAN_TYPE = 3U,
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UNORDERED_NODE_ITERATOR_TYPE = 4U,
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ORDERED_NODE_ITERATOR_TYPE = 5U,
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UNORDERED_NODE_SNAPSHOT_TYPE = 6U,
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ORDERED_NODE_SNAPSHOT_TYPE = 7U,
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ANY_UNORDERED_NODE_TYPE = 8U,
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FIRST_ORDERED_NODE_TYPE = 9U
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};
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// nsISupports interface
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(XPathResult,
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nsIXPathResult)
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static XPathResult* FromSupports(nsISupports* aSupports)
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{
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return static_cast<XPathResult*>(static_cast<nsIXPathResult*>(aSupports));
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}
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virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
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nsINode* GetParentObject() const
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{
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return mParent;
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}
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uint16_t ResultType() const
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{
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return mResultType;
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}
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double GetNumberValue(ErrorResult& aRv) const
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{
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if (mResultType != NUMBER_TYPE) {
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aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
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return 0;
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}
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return mNumberResult;
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}
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void GetStringValue(nsAString &aStringValue, ErrorResult& aRv) const
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{
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if (mResultType != STRING_TYPE) {
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aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
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return;
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}
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aStringValue = mStringResult;
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}
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bool GetBooleanValue(ErrorResult& aRv) const
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{
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if (mResultType != BOOLEAN_TYPE) {
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aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
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return false;
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}
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return mBooleanResult;
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}
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nsINode* GetSingleNodeValue(ErrorResult& aRv) const
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{
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if (!isNode()) {
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aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
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return nullptr;
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}
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return mResultNodes.SafeObjectAt(0);
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}
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bool InvalidIteratorState() const
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{
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return isIterator() && mInvalidIteratorState;
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}
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uint32_t GetSnapshotLength(ErrorResult& aRv) const
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{
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if (!isSnapshot()) {
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aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
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return 0;
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}
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return (uint32_t)mResultNodes.Count();
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}
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nsINode* IterateNext(ErrorResult& aRv);
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nsINode* SnapshotItem(uint32_t aIndex, ErrorResult& aRv) const
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{
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if (!isSnapshot()) {
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aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
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return nullptr;
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}
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return mResultNodes.SafeObjectAt(aIndex);
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}
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// nsIMutationObserver interface
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NS_DECL_NSIMUTATIONOBSERVER_CHARACTERDATACHANGED
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NS_DECL_NSIMUTATIONOBSERVER_ATTRIBUTECHANGED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTAPPENDED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTINSERTED
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NS_DECL_NSIMUTATIONOBSERVER_CONTENTREMOVED
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NS_DECL_NSIMUTATIONOBSERVER_NODEWILLBEDESTROYED
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nsresult SetExprResult(txAExprResult *aExprResult, uint16_t aResultType,
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nsINode* aContextNode) override;
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nsresult GetExprResult(txAExprResult **aExprResult) override;
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nsresult Clone(nsIXPathResult **aResult) override;
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void RemoveObserver();
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private:
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static bool isSnapshot(uint16_t aResultType)
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{
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return aResultType == UNORDERED_NODE_SNAPSHOT_TYPE ||
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aResultType == ORDERED_NODE_SNAPSHOT_TYPE;
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}
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static bool isIterator(uint16_t aResultType)
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{
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return aResultType == UNORDERED_NODE_ITERATOR_TYPE ||
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aResultType == ORDERED_NODE_ITERATOR_TYPE;
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}
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static bool isNode(uint16_t aResultType)
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{
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return aResultType == FIRST_ORDERED_NODE_TYPE ||
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aResultType == ANY_UNORDERED_NODE_TYPE;
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}
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bool isSnapshot() const
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{
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return isSnapshot(mResultType);
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}
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bool isIterator() const
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{
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return isIterator(mResultType);
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}
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bool isNode() const
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{
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return isNode(mResultType);
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}
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void Invalidate(const nsIContent* aChangeRoot);
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nsCOMPtr<nsINode> mParent;
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RefPtr<txAExprResult> mResult;
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nsCOMArray<nsINode> mResultNodes;
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nsCOMPtr<nsIDocument> mDocument;
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nsWeakPtr mContextNode;
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uint32_t mCurrentPos;
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uint16_t mResultType;
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bool mInvalidIteratorState;
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bool mBooleanResult;
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double mNumberResult;
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nsString mStringResult;
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};
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} // namespace dom
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} // namespace mozilla
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#endif /* mozilla_dom_XPathResult_h */
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