source: trunk/tools/qdoc3/quoter.cpp@ 997

Last change on this file since 997 was 846, checked in by Dmitry A. Kuminov, 15 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 10.5 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
6**
7** This file is part of the tools applications of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at qt-info@nokia.com.
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include <qfileinfo.h>
43#include <qregexp.h>
44#include <qdebug.h>
45
46#include "quoter.h"
47
48QT_BEGIN_NAMESPACE
49
50static void replaceMultipleNewlines(QString &s)
51{
52 const int n = s.size();
53 bool slurping = false;
54 int j = -1;
55 const QChar newLine = QLatin1Char('\n');
56 QChar *d = s.data();
57 for (int i = 0; i != n; ++i) {
58 const QChar c = d[i];
59 bool hit = (c == newLine);
60 if (slurping && hit)
61 continue;
62 d[++j] = c;
63 slurping = hit;
64 }
65 s.resize(++j);
66}
67
68// This is equivalent to line.split( QRegExp("\n(?!\n|$)") ) but much faster
69static QStringList splitLines(const QString &line)
70{
71 QStringList result;
72 int i = line.size();
73 while (true) {
74 int j = i - 1;
75 while (j >= 0 && line.at(j) == QLatin1Char('\n'))
76 --j;
77 while (j >= 0 && line.at(j) != QLatin1Char('\n'))
78 --j;
79 result.prepend(line.mid(j + 1, i - j - 1));
80 if (j < 0)
81 break;
82 i = j;
83 }
84 return result;
85}
86
87/*
88 Transforms 'int x = 3 + 4' into 'int x=3+4'. A white space is kept
89 between 'int' and 'x' because it is meaningful in C++.
90*/
91static void trimWhiteSpace( QString& str )
92{
93 enum { Normal, MetAlnum, MetSpace } state = Normal;
94 const int n = str.length();
95
96 int j = -1;
97 QChar *d = str.data();
98 for ( int i = 0; i != n; ++i ) {
99 const QChar c = d[i];
100 if ( c.isLetterOrNumber() ) {
101 if ( state == Normal ) {
102 state = MetAlnum;
103 } else {
104 if ( state == MetSpace )
105 str[++j] = c;
106 state = Normal;
107 }
108 str[++j] = c;
109 } else if ( c.isSpace() ) {
110 if ( state == MetAlnum )
111 state = MetSpace;
112 } else {
113 state = Normal;
114 str[++j] = c;
115 }
116 }
117 str.resize(++j);
118}
119
120Quoter::Quoter()
121 : silent( false )
122{
123 /* We're going to hard code these delimiters:
124 * C++, Qt, Qt Script, Java:
125 //! [<id>]
126 * .pro files:
127 #! [<id>]
128 * .xq, .xml, .html files:
129 <!-- [<id>] -->
130 */
131 commentHash["pro"] = "#!";
132 commentHash["py"] = "#!";
133 commentHash["html"] = "<!--";
134 commentHash["qrc"] = "<!--";
135 commentHash["ui"] = "<!--";
136 commentHash["xml"] = "<!--";
137 commentHash["xq"] = "<!--";
138}
139
140void Quoter::reset()
141{
142 silent = false;
143 plainLines.clear();
144 markedLines.clear();
145 codeLocation = Location::null;
146}
147
148void Quoter::quoteFromFile( const QString& userFriendlyFilePath,
149 const QString& plainCode,
150 const QString& markedCode )
151{
152 silent = false;
153
154 /*
155 Split the source code into logical lines. Empty lines are
156 treated specially. Before:
157
158 p->alpha();
159 p->beta();
160
161 p->gamma();
162
163
164 p->delta();
165
166 After:
167
168 p->alpha();
169 p->beta();\n
170 p->gamma();\n\n
171 p->delta();
172
173 Newlines are preserved because they affect codeLocation.
174 */
175 codeLocation = Location( userFriendlyFilePath );
176
177 plainLines = splitLines(plainCode);
178 markedLines = splitLines(markedCode);
179 if (markedLines.count() != plainLines.count()) {
180 codeLocation.warning(tr("Something is wrong with qdoc's handling of marked code"));
181 markedLines = plainLines;
182 }
183
184 /*
185 Squeeze blanks (cat -s).
186 */
187 QStringList::Iterator m = markedLines.begin();
188 while ( m != markedLines.end() ) {
189 replaceMultipleNewlines( *m );
190 ++m;
191 }
192 codeLocation.start();
193}
194
195QString Quoter::quoteLine( const Location& docLocation, const QString& command,
196 const QString& pattern )
197{
198 if ( plainLines.isEmpty() ) {
199 failedAtEnd( docLocation, command );
200 return QString();
201 }
202
203 if ( pattern.isEmpty() ) {
204 docLocation.warning( tr("Missing pattern after '\\%1'").arg(command) );
205 return QString();
206 }
207
208 if ( match(docLocation, pattern, plainLines.first()) )
209 return getLine();
210
211 if ( !silent ) {
212 docLocation.warning( tr("Command '\\%1' failed").arg(command) );
213 codeLocation.warning( tr("Pattern '%1' didn't match here")
214 .arg(pattern) );
215 silent = true;
216 }
217 return QString();
218}
219
220QString Quoter::quoteSnippet(const Location &docLocation, const QString &identifier)
221{
222 QString comment = commentForCode();
223 QString delimiter = comment + QString(" [%1]").arg(identifier);
224 QString t;
225
226 while (!plainLines.isEmpty()) {
227 if (match(docLocation, delimiter, plainLines.first())) {
228 getLine();
229 break;
230 }
231 getLine();
232 }
233 while (!plainLines.isEmpty()) {
234 QString line = plainLines.first();
235 if (match(docLocation, delimiter, line)) {
236 QString lastLine = getLine();
237 int dIndex = lastLine.indexOf(delimiter);
238 if (dIndex > 0) {
239 QString leading = lastLine.left(dIndex);
240 dIndex = leading.indexOf(comment);
241 if (dIndex != -1)
242 leading = leading.left(dIndex);
243 if (!leading.trimmed().isEmpty())
244 t += leading;
245 }
246 return t;
247 }
248 // Remove special macros to support Qt namespacing.
249 if (line.startsWith("QT_BEGIN_NAMESPACE")) {
250 getLine();
251 } else if (line.startsWith("QT_END_NAMESPACE")) {
252 getLine();
253 t += QLatin1Char('\n');
254 } else if (!line.startsWith(comment)) {
255 // Ordinary code
256 t += getLine();
257 } else {
258 // Normal comments
259 if (line.contains(QLatin1Char('\n')))
260 t += QLatin1Char('\n');
261 getLine();
262 }
263 }
264 failedAtEnd(docLocation, QString("snippet (%1)").arg(delimiter));
265 return t;
266}
267
268QString Quoter::quoteTo( const Location& docLocation, const QString& command,
269 const QString& pattern )
270{
271 QString t;
272 QString comment = commentForCode();
273
274 if ( pattern.isEmpty() ) {
275 while ( !plainLines.isEmpty() ) {
276 QString line = plainLines.first();
277 // Remove special macros to support Qt namespacing.
278 if (line.startsWith("QT_BEGIN_NAMESPACE")) {
279 getLine();
280 } else if (line.startsWith("QT_END_NAMESPACE")) {
281 getLine();
282 t += QLatin1Char('\n');
283 } else if (!line.startsWith(comment))
284 // Ordinary code
285 t += getLine();
286 else {
287 // Normal comments
288 if (line.contains(QLatin1Char('\n')))
289 t += QLatin1Char('\n');
290 getLine();
291 }
292 }
293 } else {
294 while ( !plainLines.isEmpty() ) {
295 if ( match(docLocation, pattern, plainLines.first()) ) {
296 return t;
297 }
298 t += getLine();
299 }
300 failedAtEnd( docLocation, command );
301 }
302 return t;
303}
304
305QString Quoter::quoteUntil( const Location& docLocation, const QString& command,
306 const QString& pattern )
307{
308 QString t = quoteTo( docLocation, command, pattern );
309 t += getLine();
310 return t;
311}
312
313QString Quoter::getLine()
314{
315 if ( plainLines.isEmpty() )
316 return QString();
317
318 plainLines.removeFirst();
319
320 QString t = markedLines.takeFirst();
321 t += QLatin1Char('\n');
322 codeLocation.advanceLines( t.count( QLatin1Char('\n') ) );
323 return t;
324}
325
326bool Quoter::match( const Location& docLocation, const QString& pattern0,
327 const QString& line )
328{
329 QString str = line;
330 while ( str.endsWith(QLatin1Char('\n')) )
331 str.truncate( str.length() - 1 );
332
333 QString pattern = pattern0;
334 if ( pattern.startsWith(QLatin1Char('/'))
335 && pattern.endsWith(QLatin1Char('/'))
336 && pattern.length() > 2 ) {
337 QRegExp rx( pattern.mid(1, pattern.length() - 2) );
338 if ( !silent && !rx.isValid() ) {
339 docLocation.warning( tr("Invalid regular expression '%1'")
340 .arg(rx.pattern()) );
341 silent = true;
342 }
343 return str.indexOf( rx ) != -1;
344 }
345 trimWhiteSpace(str);
346 trimWhiteSpace(pattern);
347 return str.indexOf(pattern) != -1;
348}
349
350void Quoter::failedAtEnd( const Location& docLocation, const QString& command )
351{
352 if (!silent && !command.isEmpty()) {
353 if ( codeLocation.filePath().isEmpty() ) {
354 docLocation.warning( tr("Unexpected '\\%1'").arg(command) );
355 } else {
356 docLocation.warning( tr("Command '\\%1' failed at end of file '%2'")
357 .arg(command).arg(codeLocation.filePath()) );
358 }
359 silent = true;
360 }
361}
362
363QString Quoter::commentForCode() const
364{
365 QString suffix = QFileInfo(codeLocation.fileName()).suffix();
366 return commentHash.value(suffix, "//!");
367}
368
369QT_END_NAMESPACE
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