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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include "unotools/configpaths.hxx"
21 : #include <rtl/ustring.hxx>
22 : #include <rtl/ustrbuf.hxx>
23 : #include <osl/diagnose.h>
24 :
25 : namespace utl
26 : {
27 :
28 : static
29 0 : void lcl_resolveCharEntities(OUString & aLocalString)
30 : {
31 0 : sal_Int32 nEscapePos=aLocalString.indexOf('&');
32 0 : if (nEscapePos < 0) return;
33 :
34 0 : OUStringBuffer aResult;
35 0 : sal_Int32 nStart = 0;
36 :
37 0 : do
38 : {
39 0 : sal_Unicode ch = 0;
40 0 : if (aLocalString.match("&",nEscapePos))
41 0 : ch = '&';
42 :
43 0 : else if (aLocalString.match("'",nEscapePos))
44 0 : ch = '\'';
45 :
46 0 : else if (aLocalString.match(""",nEscapePos))
47 0 : ch = '"';
48 :
49 : OSL_ENSURE(ch,"Configuration path contains '&' that is not part of a valid character escape");
50 0 : if (ch)
51 : {
52 0 : aResult.append(aLocalString.copy(nStart,nEscapePos-nStart)).append(ch);
53 :
54 0 : sal_Int32 nEscapeEnd=aLocalString.indexOf(';',nEscapePos);
55 0 : nStart = nEscapeEnd+1;
56 0 : nEscapePos=aLocalString.indexOf('&',nStart);
57 : }
58 : else
59 : {
60 0 : nEscapePos=aLocalString.indexOf('&',nEscapePos+1);
61 : }
62 : }
63 : while ( nEscapePos > 0);
64 :
65 0 : aResult.append(aLocalString.copy(nStart));
66 :
67 0 : aLocalString = aResult.makeStringAndClear();
68 : }
69 :
70 0 : bool splitLastFromConfigurationPath(OUString const& _sInPath,
71 : OUString& _rsOutPath,
72 : OUString& _rsLocalName)
73 : {
74 : sal_Int32 nStart,nEnd;
75 :
76 0 : sal_Int32 nPos = _sInPath.getLength()-1;
77 :
78 : // strip trailing slash
79 0 : if (nPos > 0 && _sInPath[ nPos ] == '/')
80 : {
81 : OSL_FAIL("Invalid config path: trailing '/' is not allowed");
82 0 : --nPos;
83 : }
84 :
85 : // check for predicate ['xxx'] or ["yyy"]
86 0 : if (nPos > 0 && _sInPath[ nPos ] == ']')
87 : {
88 0 : sal_Unicode chQuote = _sInPath[--nPos];
89 :
90 0 : if (chQuote == '\'' || chQuote == '\"')
91 : {
92 0 : nEnd = nPos;
93 0 : nPos = _sInPath.lastIndexOf(chQuote,nEnd);
94 0 : nStart = nPos + 1;
95 0 : --nPos; // nPos = rInPath.lastIndexOf('[',nPos);
96 : }
97 : else // allow [xxx]
98 : {
99 0 : nEnd = nPos + 1;
100 0 : nPos = _sInPath.lastIndexOf('[',nEnd);
101 0 : nStart = nPos + 1;
102 : }
103 :
104 : OSL_ENSURE(nPos >= 0 && _sInPath[nPos] == '[', "Invalid config path: unmatched quotes or brackets");
105 0 : if (nPos >= 0 && _sInPath[nPos] == '[')
106 : {
107 0 : nPos = _sInPath.lastIndexOf('/',nPos);
108 : }
109 : else // defined behavior for invalid paths
110 : {
111 0 : nStart = 0, nEnd = _sInPath.getLength();
112 0 : nPos = -1;
113 : }
114 :
115 : }
116 : else
117 : {
118 0 : nEnd = nPos+1;
119 0 : nPos = _sInPath.lastIndexOf('/',nEnd);
120 0 : nStart = nPos + 1;
121 : }
122 : OSL_ASSERT( -1 <= nPos &&
123 : nPos < nStart &&
124 : nStart < nEnd &&
125 : nEnd <= _sInPath.getLength() );
126 :
127 : OSL_ASSERT(nPos == -1 || _sInPath[nPos] == '/');
128 : OSL_ENSURE(nPos != 0 , "Invalid config child path: immediate child of root");
129 :
130 0 : _rsLocalName = _sInPath.copy(nStart, nEnd-nStart);
131 0 : _rsOutPath = (nPos > 0) ? _sInPath.copy(0,nPos) : OUString();
132 0 : lcl_resolveCharEntities(_rsLocalName);
133 :
134 0 : return nPos >= 0;
135 : }
136 :
137 0 : OUString extractFirstFromConfigurationPath(OUString const& _sInPath, OUString* _sOutPath)
138 : {
139 0 : sal_Int32 nSep = _sInPath.indexOf('/');
140 0 : sal_Int32 nBracket = _sInPath.indexOf('[');
141 :
142 0 : sal_Int32 nStart = nBracket + 1;
143 0 : sal_Int32 nEnd = nSep;
144 :
145 0 : if (0 <= nBracket) // found a bracket-quoted relative path
146 : {
147 0 : if (nSep < 0 || nBracket < nSep) // and the separator comes after it
148 : {
149 0 : sal_Unicode chQuote = _sInPath[nStart];
150 0 : if (chQuote == '\'' || chQuote == '\"')
151 : {
152 0 : ++nStart;
153 0 : nEnd = _sInPath.indexOf(chQuote, nStart+1);
154 0 : nBracket = nEnd+1;
155 : }
156 : else
157 : {
158 0 : nEnd = _sInPath.indexOf(']',nStart);
159 0 : nBracket = nEnd;
160 : }
161 : OSL_ENSURE(nEnd > nStart && _sInPath[nBracket] == ']', "Invalid config path: improper mismatch of quote or bracket");
162 0 : OSL_ENSURE((nBracket+1 == _sInPath.getLength() && nSep == -1) || (_sInPath[nBracket+1] == '/' && nSep == nBracket+1), "Invalid config path: brackets not followed by slash");
163 : }
164 : else // ... but our initial element name is in simple form
165 0 : nStart = 0;
166 : }
167 :
168 0 : OUString sResult = (nEnd >= 0) ? _sInPath.copy(nStart, nEnd-nStart) : _sInPath;
169 0 : lcl_resolveCharEntities(sResult);
170 :
171 0 : if (_sOutPath != 0)
172 : {
173 0 : *_sOutPath = (nSep >= 0) ? _sInPath.copy(nSep + 1) : OUString();
174 : }
175 :
176 0 : return sResult;
177 : }
178 :
179 : // find the position after the prefix in the nested path
180 : static inline
181 0 : sal_Int32 lcl_findPrefixEnd(OUString const& _sNestedPath, OUString const& _sPrefixPath)
182 : {
183 : // TODO: currently handles only exact prefix matches
184 0 : sal_Int32 nPrefixLength = _sPrefixPath.getLength();
185 :
186 : OSL_ENSURE(nPrefixLength == 0 || _sPrefixPath[nPrefixLength-1] != '/',
187 : "Cannot handle slash-terminated prefix paths");
188 :
189 : bool bIsPrefix;
190 0 : if (_sNestedPath.getLength() > nPrefixLength)
191 : {
192 0 : bIsPrefix = _sNestedPath[nPrefixLength] == '/' &&
193 0 : _sNestedPath.compareTo(_sPrefixPath,nPrefixLength) == 0;
194 0 : ++nPrefixLength;
195 : }
196 0 : else if (_sNestedPath.getLength() == nPrefixLength)
197 : {
198 0 : bIsPrefix = _sNestedPath.equals(_sPrefixPath);
199 : }
200 : else
201 : {
202 0 : bIsPrefix = false;
203 : }
204 :
205 0 : return bIsPrefix ? nPrefixLength : 0;
206 : }
207 :
208 0 : bool isPrefixOfConfigurationPath(OUString const& _sNestedPath,
209 : OUString const& _sPrefixPath)
210 : {
211 0 : return _sPrefixPath.isEmpty() || lcl_findPrefixEnd(_sNestedPath,_sPrefixPath) != 0;
212 : }
213 :
214 0 : OUString dropPrefixFromConfigurationPath(OUString const& _sNestedPath,
215 : OUString const& _sPrefixPath)
216 : {
217 0 : if ( sal_Int32 nPrefixEnd = lcl_findPrefixEnd(_sNestedPath,_sPrefixPath) )
218 : {
219 0 : return _sNestedPath.copy(nPrefixEnd);
220 : }
221 : else
222 : {
223 : OSL_ENSURE(_sPrefixPath.isEmpty(), "Path does not start with expected prefix");
224 :
225 0 : return _sNestedPath;
226 : }
227 : }
228 :
229 : static
230 0 : OUString lcl_wrapName(const OUString& _sContent, const OUString& _sType)
231 : {
232 0 : const sal_Unicode * const pBeginContent = _sContent.getStr();
233 0 : const sal_Unicode * const pEndContent = pBeginContent + _sContent.getLength();
234 :
235 : OSL_PRECOND(!_sType.isEmpty(), "Unexpected config type name: empty");
236 : OSL_PRECOND(pBeginContent <= pEndContent, "Invalid config name: empty");
237 :
238 0 : if (pBeginContent == pEndContent)
239 0 : return _sType;
240 :
241 0 : OUStringBuffer aNormalized(_sType.getLength() + _sContent.getLength() + 4); // reserve approximate size initially
242 :
243 : // prefix: type, opening bracket and quote
244 0 : aNormalized.append( _sType ).append( "['" );
245 :
246 : // content: copy over each char and handle escaping
247 0 : for(const sal_Unicode* pCur = pBeginContent; pCur != pEndContent; ++pCur)
248 : {
249 : // append (escape if needed)
250 0 : switch(*pCur)
251 : {
252 0 : case sal_Unicode('&') : aNormalized.append( "&" ); break;
253 0 : case sal_Unicode('\''): aNormalized.append( "'" ); break;
254 0 : case sal_Unicode('\"'): aNormalized.append( """ ); break;
255 :
256 0 : default: aNormalized.append( *pCur );
257 : }
258 : }
259 :
260 : // suffix: closing quote and bracket
261 0 : aNormalized.append( "']" );
262 :
263 0 : return aNormalized.makeStringAndClear();
264 : }
265 :
266 0 : OUString wrapConfigurationElementName(OUString const& _sElementName)
267 : {
268 0 : return lcl_wrapName(_sElementName, "*" );
269 : }
270 :
271 0 : OUString wrapConfigurationElementName(OUString const& _sElementName,
272 : OUString const& _sTypeName)
273 : {
274 : // todo: check that _sTypeName is valid
275 0 : return lcl_wrapName(_sElementName, _sTypeName);
276 : }
277 :
278 : } // namespace utl
279 :
280 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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