dom/xslt/xpath/txIXPathContext.h@97036ab72558
dom/xslt/xpath/txIXPathContext.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.
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/. */
6 #ifndef __TX_I_XPATH_CONTEXT
7 #define __TX_I_XPATH_CONTEXT
9 #include "txCore.h"
11 class FunctionCall;
12 class nsIAtom;
13 class txAExprResult;
14 class txResultRecycler;
15 class txXPathNode;
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 */
26 class txIParseContext
27 {
28 public:
29 virtual ~txIParseContext()
30 {
31 }
33 /*
34 * Return a namespaceID for a given prefix.
35 */
36 virtual nsresult resolveNamespacePrefix(nsIAtom* aPrefix, int32_t& aID) = 0;
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;
45 /**
46 * Should nametests parsed in this context be case-sensitive
47 */
48 virtual bool caseInsensitiveNameTests() = 0;
50 /*
51 * Callback to be used by the Parser if errors are detected.
52 */
53 virtual void SetErrorOffset(uint32_t aOffset) = 0;
54 };
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 }
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;
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;
85 /**
86 * Returns a pointer to the private context
87 */
88 virtual void* getPrivateContext() = 0;
90 virtual txResultRecycler* recycler() = 0;
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 };
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)
106 class txIEvalContext : public txIMatchContext
107 {
108 public:
109 /*
110 * Get the context node.
111 */
112 virtual const txXPathNode& getContextNode() = 0;
114 /*
115 * Get the size of the context node set.
116 */
117 virtual uint32_t size() = 0;
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 };
126 #define TX_DECL_EVAL_CONTEXT \
127 TX_DECL_MATCH_CONTEXT; \
128 const txXPathNode& getContextNode(); \
129 uint32_t size(); \
130 uint32_t position()
132 #endif // __TX_I_XPATH_CONTEXT
