mirror of
https://github.com/classilla/tenfourfox.git
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111 lines
2.8 KiB
C++
111 lines
2.8 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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#include "nsGkAtoms.h"
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#include "txIXPathContext.h"
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#include "txNodeSet.h"
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#include "txXPathTreeWalker.h"
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#include "txXSLTFunctions.h"
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#include "txExecutionState.h"
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/*
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Implementation of XSLT 1.0 extension function: generate-id
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*/
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/**
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* Creates a new generate-id function call
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**/
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GenerateIdFunctionCall::GenerateIdFunctionCall()
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{
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}
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/**
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* Evaluates this Expr based on the given context node and processor state
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* @param context the context node for evaluation of this Expr
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* @param ps the ContextState containing the stack information needed
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* for evaluation
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* @return the result of the evaluation
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* @see FunctionCall.h
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**/
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nsresult
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GenerateIdFunctionCall::evaluate(txIEvalContext* aContext,
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txAExprResult** aResult)
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{
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*aResult = nullptr;
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if (!requireParams(0, 1, aContext))
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return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
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txExecutionState* es =
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static_cast<txExecutionState*>(aContext->getPrivateContext());
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if (!es) {
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NS_ERROR(
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"called xslt extension function \"current\" with wrong context");
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return NS_ERROR_UNEXPECTED;
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}
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nsresult rv = NS_OK;
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if (mParams.IsEmpty()) {
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StringResult* strRes;
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rv = aContext->recycler()->getStringResult(&strRes);
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NS_ENSURE_SUCCESS(rv, rv);
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txXPathNodeUtils::getXSLTId(aContext->getContextNode(),
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es->getSourceDocument(),
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strRes->mValue);
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*aResult = strRes;
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return NS_OK;
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}
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RefPtr<txNodeSet> nodes;
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rv = evaluateToNodeSet(mParams[0], aContext,
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getter_AddRefs(nodes));
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NS_ENSURE_SUCCESS(rv, rv);
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if (nodes->isEmpty()) {
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aContext->recycler()->getEmptyStringResult(aResult);
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return NS_OK;
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}
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StringResult* strRes;
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rv = aContext->recycler()->getStringResult(&strRes);
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NS_ENSURE_SUCCESS(rv, rv);
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txXPathNodeUtils::getXSLTId(nodes->get(0), es->getSourceDocument(),
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strRes->mValue);
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*aResult = strRes;
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return NS_OK;
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}
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Expr::ResultType
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GenerateIdFunctionCall::getReturnType()
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{
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return STRING_RESULT;
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}
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bool
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GenerateIdFunctionCall::isSensitiveTo(ContextSensitivity aContext)
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{
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if (mParams.IsEmpty()) {
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return !!(aContext & NODE_CONTEXT);
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}
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return argsSensitiveTo(aContext);
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}
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#ifdef TX_TO_STRING
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nsresult
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GenerateIdFunctionCall::getNameAtom(nsIAtom** aAtom)
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{
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*aAtom = nsGkAtoms::generateId;
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NS_ADDREF(*aAtom);
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return NS_OK;
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}
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#endif
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