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annotate src/xlsx/xlsxcellreference.cpp @ 70:3438f5cce8cc

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author Andre Heinecke <andre.heinecke@intevation.de>
date Thu, 29 Sep 2016 14:41:48 +0200
parents 93d3106bb9a4
children
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1
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1 /****************************************************************************
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2 ** Copyright (c) 2013-2014 Debao Zhang <hello@debao.me>
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3 ** All right reserved.
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4 **
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5 ** Permission is hereby granted, free of charge, to any person obtaining
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6 ** a copy of this software and associated documentation files (the
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7 ** "Software"), to deal in the Software without restriction, including
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8 ** without limitation the rights to use, copy, modify, merge, publish,
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9 ** distribute, sublicense, and/or sell copies of the Software, and to
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10 ** permit persons to whom the Software is furnished to do so, subject to
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11 ** the following conditions:
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12 **
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13 ** The above copyright notice and this permission notice shall be
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14 ** included in all copies or substantial portions of the Software.
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15 **
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16 ** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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17 ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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18 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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19 ** NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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20 ** LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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21 ** OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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22 ** WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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23 **
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24 ****************************************************************************/
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25 #include "xlsxcellreference.h"
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26 #include <QStringList>
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27 #include <QMap>
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28 #include <QRegularExpression>
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29
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30 QT_BEGIN_NAMESPACE_XLSX
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31
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32 namespace {
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33
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34 int intPow(int x, int p)
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35 {
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36 if (p == 0) return 1;
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37 if (p == 1) return x;
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38
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39 int tmp = intPow(x, p/2);
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40 if (p%2 == 0) return tmp * tmp;
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41 else return x * tmp * tmp;
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42 }
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43
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44 QString col_to_name(int col_num)
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45 {
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46 static QMap<int, QString> col_cache;
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47
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48 if (!col_cache.contains(col_num)) {
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49 QString col_str;
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50 int remainder;
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51 while (col_num) {
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52 remainder = col_num % 26;
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53 if (remainder == 0)
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54 remainder = 26;
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55 col_str.prepend(QChar('A'+remainder-1));
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56 col_num = (col_num - 1) / 26;
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57 }
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58 col_cache.insert(col_num, col_str);
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59 }
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60
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61 return col_cache[col_num];
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62 }
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63
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64 int col_from_name(const QString &col_str)
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65 {
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66 int col = 0;
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67 int expn = 0;
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68 for (int i=col_str.size()-1; i>-1; --i) {
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69 col += (col_str[i].unicode() - 'A' + 1) * intPow(26, expn);
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70 expn++;
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71 }
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72
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73 return col;
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74 }
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75 } //namespace
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76
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77 /*!
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78 \class CellReference
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79 \brief For one single cell such as "A1"
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80 \inmodule QtXlsx
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81
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82 The CellReference class stores the cell location in a worksheet.
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83 */
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84
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85 /*!
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86 Constructs an invalid Cell Reference
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87 */
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88 CellReference::CellReference()
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89 : _row(-1), _column(-1)
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90 {
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91 }
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92
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93 /*!
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94 Constructs the Reference from the given \a row, and \a column.
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95 */
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96 CellReference::CellReference(int row, int column)
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97 : _row(row), _column(column)
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98 {
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99 }
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100
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101 /*!
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102 \overload
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103 Constructs the Reference form the given \a cell string.
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104 */
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105 CellReference::CellReference(const QString &cell)
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106 {
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107 init(cell);
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108 }
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109
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110 /*!
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111 \overload
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112 Constructs the Reference form the given \a cell string.
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113 */
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114 CellReference::CellReference(const char *cell)
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115 {
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116 init(QString::fromLatin1(cell));
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117 }
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118
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119 void CellReference::init(const QString &cell_str)
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120 {
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121 static QRegularExpression re(QStringLiteral("^\\$?([A-Z]{1,3})\\$?(\\d+)$"));
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122 QRegularExpressionMatch match = re.match(cell_str);
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123 if (match.hasMatch()) {
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124 const QString col_str = match.captured(1);
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125 const QString row_str = match.captured(2);
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126 _row = row_str.toInt();
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127 _column = col_from_name(col_str);
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128 }
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129 }
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130
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131 /*!
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132 Constructs a Reference by copying the given \a
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133 other Reference.
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134 */
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135 CellReference::CellReference(const CellReference &other)
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136 : _row(other._row), _column(other._column)
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137 {
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138 }
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139
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140 /*!
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141 Destroys the Reference.
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142 */
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143 CellReference::~CellReference()
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144 {
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145 }
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146
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147 /*!
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148 Convert the Reference to string notation, such as "A1" or "$A$1".
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149 If current object is invalid, an empty string will be returned.
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150 */
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151 QString CellReference::toString(bool row_abs, bool col_abs) const
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152 {
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153 if (!isValid())
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154 return QString();
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155
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156 QString cell_str;
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157 if (col_abs)
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158 cell_str.append(QLatin1Char('$'));
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159 cell_str.append(col_to_name(_column));
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160 if (row_abs)
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161 cell_str.append(QLatin1Char('$'));
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162 cell_str.append(QString::number(_row));
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163 return cell_str;
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164 }
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165
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166 /*!
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167 * Returns true if the Reference is valid.
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168 */
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169 bool CellReference::isValid() const
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170 {
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171 return _row > 0 && _column > 0;
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172 }
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173
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174 QT_END_NAMESPACE_XLSX
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