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annotate src/xlsx/xlsxutility.cpp @ 1:93d3106bb9a4

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Add qt xlsx library
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 22 Mar 2016 10:38:08 +0100
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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 "xlsxutility_p.h"
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26 #include "xlsxcellreference.h"
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27
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28 #include <QString>
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29 #include <QPoint>
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30 #include <QRegularExpression>
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31 #include <QMap>
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32 #include <QStringList>
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33 #include <QColor>
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34 #include <QDateTime>
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35 #include <QDebug>
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36
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37 namespace QXlsx {
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38
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39 bool parseXsdBoolean(const QString &value, bool defaultValue)
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40 {
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41 if (value == QLatin1String("1") || value == QLatin1String("true"))
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42 return true;
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43 if (value == QLatin1String("0") || value == QLatin1String("false"))
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44 return false;
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45 return defaultValue;
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46 }
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47
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48 QStringList splitPath(const QString &path)
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49 {
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50 int idx = path.lastIndexOf(QLatin1Char('/'));
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51 if (idx == -1)
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52 return QStringList()<<QStringLiteral(".")<<path;
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53
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54 return QStringList()<<path.left(idx)<<path.mid(idx+1);
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55 }
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56
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57 /*
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58 * Return the .rel file path based on filePath
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59 */
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60 QString getRelFilePath(const QString &filePath)
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61 {
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62 int idx = filePath.lastIndexOf(QLatin1Char('/'));
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63 if (idx == -1)
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64 return QString();
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65
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66 return QString(filePath.left(idx) + QLatin1String("/_rels/")
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67 + filePath.mid(idx+1) + QLatin1String(".rels"));
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68 }
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69
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70 double datetimeToNumber(const QDateTime &dt, bool is1904)
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71 {
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72 //Note, for number 0, Excel2007 shown as 1900-1-0, which should be 1899-12-31
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73 QDateTime epoch(is1904 ? QDate(1904, 1, 1): QDate(1899, 12, 31), QTime(0,0));
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74
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75 double excel_time = epoch.msecsTo(dt) / (1000*60*60*24.0);
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76
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77 #if QT_VERSION >= 0x050200
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78 if (dt.isDaylightTime()) // Add one hour if the date is Daylight
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79 excel_time += 1.0 / 24.0;
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80 #endif
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81
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82 if (!is1904 && excel_time > 59) {//31+28
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83 //Account for Excel erroneously treating 1900 as a leap year.
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84 excel_time += 1;
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85 }
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86
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87 return excel_time;
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88 }
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89
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90 double timeToNumber(const QTime &time)
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91 {
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92 return QTime(0,0).msecsTo(time) / (1000*60*60*24.0);
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93 }
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94
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95 QDateTime datetimeFromNumber(double num, bool is1904)
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96 {
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97 if (!is1904 && num > 60)
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98 num = num - 1;
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99
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100 qint64 msecs = static_cast<qint64>(num * 1000*60*60*24.0 + 0.5);
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101 QDateTime epoch(is1904 ? QDate(1904, 1, 1): QDate(1899, 12, 31), QTime(0,0));
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102
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103 QDateTime dt = epoch.addMSecs(msecs);
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104
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105 #if QT_VERSION >= 0x050200
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106 // Remove one hour to see whether the date is Daylight
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107 QDateTime dt2 = dt.addMSecs(-3600);
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108 if (dt2.isDaylightTime())
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109 return dt2;
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110 #endif
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111
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112 return dt;
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113 }
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114
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115 /*
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116 Creates a valid sheet name
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117 minimum length is 1
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118 maximum length is 31
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119 doesn't contain special chars: / \ ? * ] [ :
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120 Sheet names must not begin or end with ' (apostrophe)
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121
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122 Invalid characters are replaced by one space character ' '.
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123 */
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124 QString createSafeSheetName(const QString &nameProposal)
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125 {
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126 if (nameProposal.isEmpty())
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127 return QString();
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128
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129 QString ret = nameProposal;
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130 if (nameProposal.length() > 2 && nameProposal.startsWith(QLatin1Char('\'')) && nameProposal.endsWith(QLatin1Char('\'')))
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131 ret = unescapeSheetName(ret);
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132
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133 //Replace invalid chars with space.
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134 if (nameProposal.contains(QRegularExpression(QStringLiteral("[/\\\\?*\\][:]"))))
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135 ret.replace(QRegularExpression(QStringLiteral("[/\\\\?*\\][:]")), QStringLiteral(" "));
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136 if (ret.startsWith(QLatin1Char('\'')))
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137 ret[0] = QLatin1Char(' ');
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138 if (ret.endsWith(QLatin1Char('\'')))
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139 ret[ret.size()-1] = QLatin1Char(' ');
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140
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141 if (ret.size() > 31)
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142 ret = ret.left(31);
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143 return ret;
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144 }
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145
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146 /*
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147 * When sheetName contains space or apostrophe, escaped is needed by cellFormula/definedName/chartSerials.
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148 */
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149 QString escapeSheetName(const QString &sheetName)
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150 {
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151 //Already escaped.
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152 Q_ASSERT(!sheetName.startsWith(QLatin1Char('\'')) && !sheetName.endsWith(QLatin1Char('\'')));
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153
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154 //These is no need to escape
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155 if (!sheetName.contains(QRegularExpression(QStringLiteral("[ +\\-,%^=<>'&]"))))
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156 return sheetName;
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157
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158 //OK, escape is needed.
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159 QString name = sheetName;
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160 name.replace(QLatin1Char('\''), QLatin1String("\'\'"));
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161 return QLatin1Char('\'') + name + QLatin1Char('\'');
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162 }
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163
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164 /*
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165 */
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166 QString unescapeSheetName(const QString &sheetName)
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167 {
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168 Q_ASSERT(sheetName.length() > 2 && sheetName.startsWith(QLatin1Char('\'')) && sheetName.endsWith(QLatin1Char('\'')));
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169
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170 QString name = sheetName.mid(1, sheetName.length()-2);
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171 name.replace(QLatin1String("\'\'"), QLatin1String("\'"));
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172 return name;
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173 }
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174
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175 /*
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176 * whether the string s starts or ends with space
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177 */
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178 bool isSpaceReserveNeeded(const QString &s)
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179 {
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180 QString spaces(QStringLiteral(" \t\n\r"));
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181 return !s.isEmpty() && (spaces.contains(s.at(0))||spaces.contains(s.at(s.length()-1)));
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182 }
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183
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184 /*
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185 * Convert shared formula for non-root cells.
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186 *
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187 * For example, if "B1:B10" have shared formula "=A1*A1", this function will return "=A2*A2"
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188 * for "B2" cell, "=A3*A3" for "B3" cell, etc.
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189 *
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190 * Note, the formula "=A1*A1" for B1 can also be written as "=RC[-1]*RC[-1]", which is the same
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191 * for all other cells. In other words, this formula is shared.
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192 *
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193 * For long run, we need a formula parser.
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194 */
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195 QString convertSharedFormula(const QString &rootFormula, const CellReference &rootCell, const CellReference &cell)
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196 {
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197 //Find all the "$?[A-Z]+$?[0-9]+" patterns in the rootFormula.
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198 QList<QPair<QString, int> > segments;
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199
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200 QString segment;
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201 bool inQuote = false;
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202 enum RefState{INVALID, PRE_AZ, AZ, PRE_09, _09};
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203 RefState refState = INVALID;
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204 int refFlag = 0; // 0x00, 0x01, 0x02, 0x03 ==> A1, $A1, A$1, $A$1
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205 foreach (QChar ch, rootFormula) {
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206 if (inQuote) {
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207 segment.append(ch);
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208 if (ch == QLatin1Char('"'))
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209 inQuote = false;
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210 } else {
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211 if (ch == QLatin1Char('"')) {
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212 inQuote = true;
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213 refState = INVALID;
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214 segment.append(ch);
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215 } else if (ch == QLatin1Char('$')) {
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216 if (refState == AZ) {
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217 segment.append(ch);
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218 refState = PRE_09;
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219 refFlag |= 0x02;
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220 } else {
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221 segments.append(qMakePair(segment, refState==_09 ? refFlag : -1));
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222 segment = QString(ch); //Start new segment.
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223 refState = PRE_AZ;
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224 refFlag = 0x01;
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225 }
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226 } else if (ch >= QLatin1Char('A') && ch <=QLatin1Char('Z')) {
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227 if (refState == PRE_AZ || refState == AZ) {
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228 segment.append(ch);
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229 } else {
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230 segments.append(qMakePair(segment, refState==_09 ? refFlag : -1));
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231 segment = QString(ch); //Start new segment.
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232 refFlag = 0x00;
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233 }
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234 refState = AZ;
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235 } else if (ch >= QLatin1Char('0') && ch <=QLatin1Char('9')) {
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236 segment.append(ch);
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237
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238 if (refState == AZ || refState == PRE_09 || refState == _09)
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239 refState = _09;
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240 else
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241 refState = INVALID;
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242 } else {
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243 if (refState == _09) {
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244 segments.append(qMakePair(segment, refFlag));
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245 segment = QString(ch); //Start new segment.
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246 } else {
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247 segment.append(ch);
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248 }
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249 refState = INVALID;
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250 }
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251 }
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252 }
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253
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254 if (!segment.isEmpty())
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255 segments.append(qMakePair(segment, refState==_09 ? refFlag : -1));
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256
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257 //Replace "A1", "$A1", "A$1" segment with proper one.
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258 QStringList result;
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259 typedef QPair<QString, int> PairType;
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260 foreach (PairType p, segments) {
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261 //qDebug()<<p.first<<p.second;
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262 if (p.second != -1 && p.second != 3) {
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263 CellReference oldRef(p.first);
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264 int row = p.second & 0x02 ? oldRef.row() : oldRef.row()-rootCell.row()+cell.row();
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265 int col = p.second & 0x01 ? oldRef.column() : oldRef.column()-rootCell.column()+cell.column();
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266 result.append(CellReference(row, col).toString(p.second & 0x02, p.second & 0x01));
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267 } else {
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268 result.append(p.first);
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269 }
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270 }
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271
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272 //OK
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273 return result.join(QString());
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274 }
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275
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276 } //namespace QXlsx
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