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comparison: dom/xslt/xpath/txIXPathContext.h
dom/xslt/xpath/txIXPathContext.h
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| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef __TX_I_XPATH_CONTEXT | |
| 7 #define __TX_I_XPATH_CONTEXT | |
| 8 | |
| 9 #include "txCore.h" | |
| 10 | |
| 11 class FunctionCall; | |
| 12 class nsIAtom; | |
| 13 class txAExprResult; | |
| 14 class txResultRecycler; | |
| 15 class txXPathNode; | |
| 16 | |
| 17 /* | |
| 18 * txIParseContext | |
| 19 * | |
| 20 * This interface describes the context needed to create | |
| 21 * XPath Expressions and XSLT Patters. | |
| 22 * (not completely though. key() requires the ProcessorState, which is | |
| 23 * not part of this interface.) | |
| 24 */ | |
| 25 | |
| 26 class txIParseContext | |
| 27 { | |
| 28 public: | |
| 29 virtual ~txIParseContext() | |
| 30 { | |
| 31 } | |
| 32 | |
| 33 /* | |
| 34 * Return a namespaceID for a given prefix. | |
| 35 */ | |
| 36 virtual nsresult resolveNamespacePrefix(nsIAtom* aPrefix, int32_t& aID) = 0; | |
| 37 | |
| 38 /* | |
| 39 * Create a FunctionCall, needed for extension function calls and | |
| 40 * XSLT. XPath function calls are resolved by the Parser. | |
| 41 */ | |
| 42 virtual nsresult resolveFunctionCall(nsIAtom* aName, int32_t aID, | |
| 43 FunctionCall** aFunction) = 0; | |
| 44 | |
| 45 /** | |
| 46 * Should nametests parsed in this context be case-sensitive | |
| 47 */ | |
| 48 virtual bool caseInsensitiveNameTests() = 0; | |
| 49 | |
| 50 /* | |
| 51 * Callback to be used by the Parser if errors are detected. | |
| 52 */ | |
| 53 virtual void SetErrorOffset(uint32_t aOffset) = 0; | |
| 54 }; | |
| 55 | |
| 56 /* | |
| 57 * txIMatchContext | |
| 58 * | |
| 59 * Interface used for matching XSLT Patters. | |
| 60 * This is the part of txIEvalContext (see below), that is independent | |
| 61 * of the context node when evaluating a XPath expression, too. | |
| 62 * When evaluating a XPath expression, |txIMatchContext|s are used | |
| 63 * to transport the information from Step to Step. | |
| 64 */ | |
| 65 class txIMatchContext | |
| 66 { | |
| 67 public: | |
| 68 virtual ~txIMatchContext() | |
| 69 { | |
| 70 } | |
| 71 | |
| 72 /* | |
| 73 * Return the ExprResult associated with the variable with the | |
| 74 * given namespace and local name. | |
| 75 */ | |
| 76 virtual nsresult getVariable(int32_t aNamespace, nsIAtom* aLName, | |
| 77 txAExprResult*& aResult) = 0; | |
| 78 | |
| 79 /* | |
| 80 * Is whitespace stripping allowed for the given node? | |
| 81 * See http://www.w3.org/TR/xslt#strip | |
| 82 */ | |
| 83 virtual bool isStripSpaceAllowed(const txXPathNode& aNode) = 0; | |
| 84 | |
| 85 /** | |
| 86 * Returns a pointer to the private context | |
| 87 */ | |
| 88 virtual void* getPrivateContext() = 0; | |
| 89 | |
| 90 virtual txResultRecycler* recycler() = 0; | |
| 91 | |
| 92 /* | |
| 93 * Callback to be used by the expression/pattern if errors are detected. | |
| 94 */ | |
| 95 virtual void receiveError(const nsAString& aMsg, nsresult aRes) = 0; | |
| 96 }; | |
| 97 | |
| 98 #define TX_DECL_MATCH_CONTEXT \ | |
| 99 nsresult getVariable(int32_t aNamespace, nsIAtom* aLName, \ | |
| 100 txAExprResult*& aResult); \ | |
| 101 bool isStripSpaceAllowed(const txXPathNode& aNode); \ | |
| 102 void* getPrivateContext(); \ | |
| 103 txResultRecycler* recycler(); \ | |
| 104 void receiveError(const nsAString& aMsg, nsresult aRes) | |
| 105 | |
| 106 class txIEvalContext : public txIMatchContext | |
| 107 { | |
| 108 public: | |
| 109 /* | |
| 110 * Get the context node. | |
| 111 */ | |
| 112 virtual const txXPathNode& getContextNode() = 0; | |
| 113 | |
| 114 /* | |
| 115 * Get the size of the context node set. | |
| 116 */ | |
| 117 virtual uint32_t size() = 0; | |
| 118 | |
| 119 /* | |
| 120 * Get the position of the context node in the context node set, | |
| 121 * starting with 1. | |
| 122 */ | |
| 123 virtual uint32_t position() = 0; | |
| 124 }; | |
| 125 | |
| 126 #define TX_DECL_EVAL_CONTEXT \ | |
| 127 TX_DECL_MATCH_CONTEXT; \ | |
| 128 const txXPathNode& getContextNode(); \ | |
| 129 uint32_t size(); \ | |
| 130 uint32_t position() | |
| 131 | |
| 132 #endif // __TX_I_XPATH_CONTEXT |
