dom/xslt/xpath/txExprParser.h@97036ab72558 (annotated)
dom/xslt/xpath/txExprParser.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | /** |
| michael@0 | 7 | * ExprParser |
| michael@0 | 8 | * This class is used to parse XSL Expressions |
| michael@0 | 9 | * @see ExprLexer |
| michael@0 | 10 | **/ |
| michael@0 | 11 | |
| michael@0 | 12 | #ifndef MITREXSL_EXPRPARSER_H |
| michael@0 | 13 | #define MITREXSL_EXPRPARSER_H |
| michael@0 | 14 | |
| michael@0 | 15 | #include "txCore.h" |
| michael@0 | 16 | #include "nsAutoPtr.h" |
| michael@0 | 17 | #include "nsString.h" |
| michael@0 | 18 | |
| michael@0 | 19 | class AttributeValueTemplate; |
| michael@0 | 20 | class Expr; |
| michael@0 | 21 | class txExprLexer; |
| michael@0 | 22 | class FunctionCall; |
| michael@0 | 23 | class LocationStep; |
| michael@0 | 24 | class nsIAtom; |
| michael@0 | 25 | class PredicateList; |
| michael@0 | 26 | class Token; |
| michael@0 | 27 | class txIParseContext; |
| michael@0 | 28 | class txNodeTest; |
| michael@0 | 29 | class txNodeTypeTest; |
| michael@0 | 30 | |
| michael@0 | 31 | class txExprParser |
| michael@0 | 32 | { |
| michael@0 | 33 | public: |
| michael@0 | 34 | |
| michael@0 | 35 | static nsresult createExpr(const nsSubstring& aExpression, |
| michael@0 | 36 | txIParseContext* aContext, Expr** aExpr) |
| michael@0 | 37 | { |
| michael@0 | 38 | return createExprInternal(aExpression, 0, aContext, aExpr); |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | /** |
| michael@0 | 42 | * Creates an Attribute Value Template using the given value |
| michael@0 | 43 | */ |
| michael@0 | 44 | static nsresult createAVT(const nsSubstring& aAttrValue, |
| michael@0 | 45 | txIParseContext* aContext, |
| michael@0 | 46 | Expr** aResult); |
| michael@0 | 47 | |
| michael@0 | 48 | |
| michael@0 | 49 | protected: |
| michael@0 | 50 | static nsresult createExprInternal(const nsSubstring& aExpression, |
| michael@0 | 51 | uint32_t aSubStringPos, |
| michael@0 | 52 | txIParseContext* aContext, |
| michael@0 | 53 | Expr** aExpr); |
| michael@0 | 54 | /** |
| michael@0 | 55 | * Using nsAutoPtr& to optimize passing the ownership to the |
| michael@0 | 56 | * created binary expression objects. |
| michael@0 | 57 | */ |
| michael@0 | 58 | static nsresult createBinaryExpr(nsAutoPtr<Expr>& left, |
| michael@0 | 59 | nsAutoPtr<Expr>& right, Token* op, |
| michael@0 | 60 | Expr** aResult); |
| michael@0 | 61 | static nsresult createExpr(txExprLexer& lexer, txIParseContext* aContext, |
| michael@0 | 62 | Expr** aResult); |
| michael@0 | 63 | static nsresult createFilterOrStep(txExprLexer& lexer, |
| michael@0 | 64 | txIParseContext* aContext, |
| michael@0 | 65 | Expr** aResult); |
| michael@0 | 66 | static nsresult createFunctionCall(txExprLexer& lexer, |
| michael@0 | 67 | txIParseContext* aContext, |
| michael@0 | 68 | Expr** aResult); |
| michael@0 | 69 | static nsresult createLocationStep(txExprLexer& lexer, |
| michael@0 | 70 | txIParseContext* aContext, |
| michael@0 | 71 | Expr** aResult); |
| michael@0 | 72 | static nsresult createNodeTypeTest(txExprLexer& lexer, |
| michael@0 | 73 | txNodeTest** aResult); |
| michael@0 | 74 | static nsresult createPathExpr(txExprLexer& lexer, |
| michael@0 | 75 | txIParseContext* aContext, |
| michael@0 | 76 | Expr** aResult); |
| michael@0 | 77 | static nsresult createUnionExpr(txExprLexer& lexer, |
| michael@0 | 78 | txIParseContext* aContext, |
| michael@0 | 79 | Expr** aResult); |
| michael@0 | 80 | |
| michael@0 | 81 | static bool isLocationStepToken(Token* aToken); |
| michael@0 | 82 | |
| michael@0 | 83 | static short precedence(Token* aToken); |
| michael@0 | 84 | |
| michael@0 | 85 | /** |
| michael@0 | 86 | * Resolve a QName, given the mContext parse context. |
| michael@0 | 87 | * Returns prefix and localName as well as namespace ID |
| michael@0 | 88 | */ |
| michael@0 | 89 | static nsresult resolveQName(const nsAString& aQName, nsIAtom** aPrefix, |
| michael@0 | 90 | txIParseContext* aContext, |
| michael@0 | 91 | nsIAtom** aLocalName, int32_t& aNamespace, |
| michael@0 | 92 | bool aIsNameTest = false); |
| michael@0 | 93 | |
| michael@0 | 94 | /** |
| michael@0 | 95 | * Using the given lexer, parses the tokens if they represent a |
| michael@0 | 96 | * predicate list |
| michael@0 | 97 | * If an error occurs a non-zero String pointer will be returned |
| michael@0 | 98 | * containing the error message. |
| michael@0 | 99 | * @param predicateList, the PredicateList to add predicate expressions to |
| michael@0 | 100 | * @param lexer the ExprLexer to use for parsing tokens |
| michael@0 | 101 | * @return 0 if successful, or a String pointer to the error message |
| michael@0 | 102 | */ |
| michael@0 | 103 | static nsresult parsePredicates(PredicateList* aPredicateList, |
| michael@0 | 104 | txExprLexer& lexer, |
| michael@0 | 105 | txIParseContext* aContext); |
| michael@0 | 106 | static nsresult parseParameters(FunctionCall* aFnCall, txExprLexer& lexer, |
| michael@0 | 107 | txIParseContext* aContext); |
| michael@0 | 108 | |
| michael@0 | 109 | }; |
| michael@0 | 110 | |
| michael@0 | 111 | #endif |
