1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/xslt/xpath/txExprParser.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,111 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/**
1.10 + * ExprParser
1.11 + * This class is used to parse XSL Expressions
1.12 + * @see ExprLexer
1.13 +**/
1.14 +
1.15 +#ifndef MITREXSL_EXPRPARSER_H
1.16 +#define MITREXSL_EXPRPARSER_H
1.17 +
1.18 +#include "txCore.h"
1.19 +#include "nsAutoPtr.h"
1.20 +#include "nsString.h"
1.21 +
1.22 +class AttributeValueTemplate;
1.23 +class Expr;
1.24 +class txExprLexer;
1.25 +class FunctionCall;
1.26 +class LocationStep;
1.27 +class nsIAtom;
1.28 +class PredicateList;
1.29 +class Token;
1.30 +class txIParseContext;
1.31 +class txNodeTest;
1.32 +class txNodeTypeTest;
1.33 +
1.34 +class txExprParser
1.35 +{
1.36 +public:
1.37 +
1.38 + static nsresult createExpr(const nsSubstring& aExpression,
1.39 + txIParseContext* aContext, Expr** aExpr)
1.40 + {
1.41 + return createExprInternal(aExpression, 0, aContext, aExpr);
1.42 + }
1.43 +
1.44 + /**
1.45 + * Creates an Attribute Value Template using the given value
1.46 + */
1.47 + static nsresult createAVT(const nsSubstring& aAttrValue,
1.48 + txIParseContext* aContext,
1.49 + Expr** aResult);
1.50 +
1.51 +
1.52 +protected:
1.53 + static nsresult createExprInternal(const nsSubstring& aExpression,
1.54 + uint32_t aSubStringPos,
1.55 + txIParseContext* aContext,
1.56 + Expr** aExpr);
1.57 + /**
1.58 + * Using nsAutoPtr& to optimize passing the ownership to the
1.59 + * created binary expression objects.
1.60 + */
1.61 + static nsresult createBinaryExpr(nsAutoPtr<Expr>& left,
1.62 + nsAutoPtr<Expr>& right, Token* op,
1.63 + Expr** aResult);
1.64 + static nsresult createExpr(txExprLexer& lexer, txIParseContext* aContext,
1.65 + Expr** aResult);
1.66 + static nsresult createFilterOrStep(txExprLexer& lexer,
1.67 + txIParseContext* aContext,
1.68 + Expr** aResult);
1.69 + static nsresult createFunctionCall(txExprLexer& lexer,
1.70 + txIParseContext* aContext,
1.71 + Expr** aResult);
1.72 + static nsresult createLocationStep(txExprLexer& lexer,
1.73 + txIParseContext* aContext,
1.74 + Expr** aResult);
1.75 + static nsresult createNodeTypeTest(txExprLexer& lexer,
1.76 + txNodeTest** aResult);
1.77 + static nsresult createPathExpr(txExprLexer& lexer,
1.78 + txIParseContext* aContext,
1.79 + Expr** aResult);
1.80 + static nsresult createUnionExpr(txExprLexer& lexer,
1.81 + txIParseContext* aContext,
1.82 + Expr** aResult);
1.83 +
1.84 + static bool isLocationStepToken(Token* aToken);
1.85 +
1.86 + static short precedence(Token* aToken);
1.87 +
1.88 + /**
1.89 + * Resolve a QName, given the mContext parse context.
1.90 + * Returns prefix and localName as well as namespace ID
1.91 + */
1.92 + static nsresult resolveQName(const nsAString& aQName, nsIAtom** aPrefix,
1.93 + txIParseContext* aContext,
1.94 + nsIAtom** aLocalName, int32_t& aNamespace,
1.95 + bool aIsNameTest = false);
1.96 +
1.97 + /**
1.98 + * Using the given lexer, parses the tokens if they represent a
1.99 + * predicate list
1.100 + * If an error occurs a non-zero String pointer will be returned
1.101 + * containing the error message.
1.102 + * @param predicateList, the PredicateList to add predicate expressions to
1.103 + * @param lexer the ExprLexer to use for parsing tokens
1.104 + * @return 0 if successful, or a String pointer to the error message
1.105 + */
1.106 + static nsresult parsePredicates(PredicateList* aPredicateList,
1.107 + txExprLexer& lexer,
1.108 + txIParseContext* aContext);
1.109 + static nsresult parseParameters(FunctionCall* aFnCall, txExprLexer& lexer,
1.110 + txIParseContext* aContext);
1.111 +
1.112 +};
1.113 +
1.114 +#endif
