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qtextlist.cpp

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1 /**************************************************************************** -

2 ** -

4 ** Contact: https://www.qt.io/licensing/ -

5 ** -

6 ** This file is part of the QtGui module of the Qt Toolkit. -

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8 ** $QT_BEGIN_LICENSE:LGPL$ -

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21 ** packaging of this file. Please review the following information to -

22 ** ensure the GNU Lesser General Public License version 3 requirements -

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24 ** -

25 ** GNU General Public License Usage -

26 ** Alternatively, this file may be used under the terms of the GNU -

27 ** General Public License version 2.0 or (at your option) the GNU General -

28 ** Public license version 3 or any later version approved by the KDE Free -

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32 ** information to ensure the GNU General Public License requirements will -

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35 ** -

36 ** $QT_END_LICENSE$ -

37 ** -

38 ****************************************************************************/ -

39 -

40 -

41 #include "qtextlist.h" -

42 #include "qtextobject_p.h" -

43 #include "qtextcursor.h" -

44 #include "qtextdocument_p.h" -

45 #include <qdebug.h> -

46 -

47 QT_BEGIN_NAMESPACE -

48 -

49 class QTextListPrivate : public QTextBlockGroupPrivate -

50 { -

51 public: -

52 QTextListPrivate(QTextDocument *doc) -

53 : QTextBlockGroupPrivate(doc) -

54 { -

}

never executed: end of block

56 }; -

57 -

58 /*! -

59 \class QTextList -

60 \reentrant -

61 -

62 \brief The QTextList class provides a decorated list of items in a QTextDocument. -

63 \inmodule QtGui -

64 -

65 \ingroup richtext-processing -

66 -

67 A list contains a sequence of text blocks, each of which is marked with a -

68 bullet point or other symbol. Multiple levels of lists can be used, and -

69 the automatic numbering feature provides support for ordered numeric and -

70 alphabetical lists. -

71 -

72 Lists are created by using a text cursor to insert an empty list at the -

73 current position or by moving existing text into a new list. -

74 The \l{QTextCursor::insertList()} function inserts an empty block into the -

75 document at the cursor position, and makes it the first item in a list. -

76 -

77 \snippet textdocument-lists/mainwindow.cpp 0 -

78 -

79 The \l{QTextCursor::createList()} function takes the contents of the -

80 cursor's current block and turns it into the first item of a new list. -

81 -

82 The cursor's current list is found with \l{QTextCursor::currentList()}. -

83 -

84 The number of items in a list is given by count(). Each item can be -

85 obtained by its index in the list with the item() function. Similarly, -

86 the index of a given item can be found with itemNumber(). The text of -

87 each item can be found with the itemText() function. -

88 -

89 Note that the items in the list may not be adjacent elements in the -

90 document. For example, the top-level items in a multi-level list will -

91 be separated by the items in lower levels of the list. -

92 -

93 List items can be deleted by index with the removeItem() function. -

94 remove() deletes the specified item in the list. -

95 -

96 The list's format is set with setFormat() and read with format(). -

97 The format describes the decoration of the list itself, and not the -

98 individual items. -

99 -

100 \sa QTextBlock, QTextListFormat, QTextCursor -

101 */ -

102 -

103 /*! -

104 \fn bool QTextList::isEmpty() const -

105 \obsolete -

106 -

107 Returns \c true if the list has no items; otherwise returns \c false. -

108 -

109 \b{Note:} Empty lists are automatically deleted by the QTextDocument that owns -

110 them. -

111 -

112 \sa count() -

113 */ -

114 -

115 /*! \internal -

116 */ -

117 QTextList::QTextList(QTextDocument *doc) -

118 : QTextBlockGroup(*new QTextListPrivate(doc), doc) -

119 { -

120

}

never executed: end of block

121 -

122 /*! -

123 \internal -

124 */ -

125 QTextList::~QTextList() -

126 { -

127 } -

128 -

129 /*! -

130 Returns the number of items in the list. -

131 */ -

132 int QTextList::count() const -

133 { -

134 Q_D(const QTextList); -

135

return d->blocks.count();

never executed: return d->blocks.count();

136 } -

137 -

138 /*! -

139 Returns the \a{i}-th text block in the list. -

140 -

141 \sa count(), itemText() -

142 */ -

143 QTextBlock QTextList::item(int i) const -

144 { -

145 Q_D(const QTextList); -

146

if (i < 0 || i >= d->blocks.size())

i < 0	Description
TRUE	never evaluated
FALSE	never evaluated

i >= d->blocks.size()	Description
TRUE	never evaluated
FALSE	never evaluated

147

return QTextBlock();

never executed: return QTextBlock();

148

return d->blocks.at(i);

never executed: return d->blocks.at(i);

149 } -

150 -

151 /*! -

152 \fn void QTextList::setFormat(const QTextListFormat &format) -

153 -

154 Sets the list's format to \a format. -

155 */ -

156 -

157 /*! -

158 \fn QTextListFormat QTextList::format() const -

159 -

160 Returns the list's format. -

161 */ -

162 -

163 /*! -

164 \fn int QTextList::itemNumber(const QTextBlock &block) const -

165 -

166 Returns the index of the list item that corresponds to the given \a block. -

167 Returns -1 if the block was not present in the list. -

168 */ -

169 int QTextList::itemNumber(const QTextBlock &blockIt) const -

170 { -

171 Q_D(const QTextList); -

172

return d->blocks.indexOf(blockIt);

never executed: return d->blocks.indexOf(blockIt);

173 } -

174 -

175 /*! -

176 \fn QString QTextList::itemText(const QTextBlock &block) const -

177 -

178 Returns the text of the list item that corresponds to the given \a block. -

179 */ -

180 QString QTextList::itemText(const QTextBlock &blockIt) const -

181 { -

182 Q_D(const QTextList); -

183 int item = d->blocks.indexOf(blockIt) + 1; -

184

if (item <= 0)

item <= 0	Description
TRUE	never evaluated
FALSE	never evaluated

185

return QString();

never executed: return QString();

186 -

187 QTextBlock block = d->blocks.at(item-1); -

188 QTextBlockFormat blockFormat = block.blockFormat(); -

189 -

190 QString result; -

191 -

192 const int style = format().style(); -

193 QString numberPrefix; -

194 QString numberSuffix = QLatin1String("."); -

195 -

196

if (format().hasProperty(QTextFormat::ListNumberPrefix))

format().hasPr...tNumberPrefix)	Description
TRUE	never evaluated
FALSE	never evaluated

197

numberPrefix = format().numberPrefix();

never executed: numberPrefix = format().numberPrefix();

198

if (format().hasProperty(QTextFormat::ListNumberSuffix))

format().hasPr...tNumberSuffix)	Description
TRUE	never evaluated
FALSE	never evaluated

199

numberSuffix = format().numberSuffix();

never executed: numberSuffix = format().numberSuffix();

200 -

201 switch (style) { -

202

case QTextListFormat::ListDecimal:

never executed: case QTextListFormat::ListDecimal:

203 result = QString::number(item); -

204

break;

never executed: break;

205 // from the old richtext -

206

case QTextListFormat::ListLowerAlpha:

never executed: case QTextListFormat::ListLowerAlpha:

207

case QTextListFormat::ListUpperAlpha:

never executed: case QTextListFormat::ListUpperAlpha:

208 { -

209

const char baseChar = style == QTextListFormat::ListUpperAlpha ? 'A' : 'a';

style == QText...ListUpperAlpha	Description
TRUE	never evaluated
FALSE	never evaluated

210 -

211 int c = item; -

212

while (c > 0) {

c > 0	Description
TRUE	never evaluated
FALSE	never evaluated

213 c--; -

214 result.prepend(QChar(baseChar + (c % 26))); -

215 c /= 26; -

216

}

never executed: end of block

217 } -

218

break;

never executed: break;

219

case QTextListFormat::ListLowerRoman:

never executed: case QTextListFormat::ListLowerRoman:

220

case QTextListFormat::ListUpperRoman:

never executed: case QTextListFormat::ListUpperRoman:

221 { -

222

if (item < 5000) {

item < 5000	Description
TRUE	never evaluated
FALSE	never evaluated

223 QByteArray romanNumeral; -

224 -

225 // works for up to 4999 items -

226 static const char romanSymbolsLower[] = "iiivixxxlxcccdcmmmm"; -

227 static const char romanSymbolsUpper[] = "IIIVIXXXLXCCCDCMMMM"; -

228 QByteArray romanSymbols; // wrap to have "mid" -

229

if (style == QTextListFormat::ListLowerRoman)

style == QText...ListLowerRoman	Description
TRUE	never evaluated
FALSE	never evaluated

230

romanSymbols = QByteArray::fromRawData(romanSymbolsLower, sizeof(romanSymbolsLower));

never executed: romanSymbols = QByteArray::fromRawData(romanSymbolsLower, sizeof(romanSymbolsLower));

231 else -

232

romanSymbols = QByteArray::fromRawData(romanSymbolsUpper, sizeof(romanSymbolsUpper));

never executed: romanSymbols = QByteArray::fromRawData(romanSymbolsUpper, sizeof(romanSymbolsUpper));

233 -

234 int c[] = { 1, 4, 5, 9, 10, 40, 50, 90, 100, 400, 500, 900, 1000 }; -

235 int n = item; -

236

for (int i = 12; i >= 0; n %= c[i], i--) {

i >= 0	Description
TRUE	never evaluated
FALSE	never evaluated

237 int q = n / c[i]; -

238

if (q > 0) {

q > 0	Description
TRUE	never evaluated
FALSE	never evaluated

239 int startDigit = i + (i+3)/4; -

240 int numDigits; -

241

if (i % 4) {

i % 4	Description
TRUE	never evaluated
FALSE	never evaluated

242 // c[i] == 4|5|9|40|50|90|400|500|900 -

243

if ((i-2) % 4) {

(i-2) % 4	Description
TRUE	never evaluated
FALSE	never evaluated

244 // c[i] == 4|9|40|90|400|900 => with subtraction (IV, IX, XL, XC, ...) -

245 numDigits = 2; -

246

}

never executed: end of block

247 else { -

248 // c[i] == 5|50|500 (V, L, D) -

249 numDigits = 1; -

250

}

never executed: end of block

251 } -

252 else { -

253 // c[i] == 1|10|100|1000 (I, II, III, X, XX, ...) -

254 numDigits = q; -

255

}

never executed: end of block

256 -

257 romanNumeral.append(romanSymbols.mid(startDigit, numDigits)); -

258

}

never executed: end of block

259

}

never executed: end of block

260 result = QString::fromLatin1(romanNumeral); -

261

}

never executed: end of block

262 else { -

263 result = QLatin1String("?"); -

264

}

never executed: end of block

265 -

266 } -

267

break;

never executed: break;

268

default:

never executed: default:

269 Q_ASSERT(false); -

270

}

never executed: end of block

271

if (blockIt.textDirection() == Qt::RightToLeft)

blockIt.textDi...t::RightToLeft	Description
TRUE	never evaluated
FALSE	never evaluated

272

return numberSuffix + result + numberPrefix;

never executed: return numberSuffix + result + numberPrefix;

273 else -

274

return numberPrefix + result + numberSuffix;

never executed: return numberPrefix + result + numberSuffix;

275 } -

276 -

277 /*! -

278 Removes the item at item position \a i from the list. When the last item in the -

279 list is removed, the list is automatically deleted by the QTextDocument that owns -

280 it. -

281 -

282 \sa add(), remove() -

283 */ -

284 void QTextList::removeItem(int i) -

285 { -

286 Q_D(QTextList); -

287

if (i < 0 || i >= d->blocks.size())

i < 0	Description
TRUE	never evaluated
FALSE	never evaluated

i >= d->blocks.size()	Description
TRUE	never evaluated
FALSE	never evaluated

288

return;

never executed: return;

289 -

290 QTextBlock block = d->blocks.at(i); -

291 remove(block); -

292

}

never executed: end of block

293 -

294 -

295 /*! -

296 Removes the given \a block from the list. -

297 -

298 \sa add(), removeItem() -

299 */ -

300 void QTextList::remove(const QTextBlock &block) -

301 { -

302 QTextBlockFormat fmt = block.blockFormat(); -

303 fmt.setIndent(fmt.indent() + format().indent()); -

304 fmt.setObjectIndex(-1); -

305 block.docHandle()->setBlockFormat(block, block, fmt, QTextDocumentPrivate::SetFormat); -

306

}

never executed: end of block

307 -

308 /*! -

309 Makes the given \a block part of the list. -

310 -

311 \sa remove(), removeItem() -

312 */ -

313 void QTextList::add(const QTextBlock &block) -

314 { -

315 QTextBlockFormat fmt = block.blockFormat(); -

316 fmt.setObjectIndex(objectIndex()); -

317 block.docHandle()->setBlockFormat(block, block, fmt, QTextDocumentPrivate::SetFormat); -

318

}

never executed: end of block

319 -

320 QT_END_NAMESPACE -

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