1  #include "regexprole.h"
  2  #include "qqmlsortfilterproxymodel.h"
  3  #include <QDebug>
  4  
  5  namespace qqsfpm {
  6  
  7  /*!
  8      \qmltype RegExpRole
  9      \inherits ProxyRole
 10      \inqmlmodule SortFilterProxyModel
 11      \ingroup ProxyRoles
 12      \brief A ProxyRole extracting data from a source role via a regular expression.
 13  
 14      A RegExpRole is a \l ProxyRole that provides a role for each named capture group of its regular expression \l pattern.
 15  
 16      In the following example, the \c date role of the source model will be extracted in 3 roles in the proxy moodel: \c year, \c month and \c day.
 17      \code
 18      SortFilterProxyModel {
 19          sourceModel: eventModel
 20          proxyRoles: RegExpRole {
 21              roleName: "date"
 22              pattern: "(?<year>\\d{4})-(?<month>\\d{2})-(?<day>\\d{2})"
 23          }
 24      }
 25      \endcode
 26  */
 27  
 28  /*!
 29      \qmlproperty QString RegExpRole::roleName
 30  
 31      This property holds the role name that the RegExpRole is using to query the source model's data to extract new roles from.
 32  */
 33  QString RegExpRole::roleName() const
 34  {
 35      return m_roleName;
 36  }
 37  
 38  void RegExpRole::setRoleName(const QString& roleName)
 39  {
 40      if (m_roleName == roleName)
 41          return;
 42  
 43      m_roleName = roleName;
 44      Q_EMIT roleNameChanged();
 45  }
 46  
 47  /*!
 48      \qmlproperty QString RegExpRole::pattern
 49  
 50      This property holds the pattern of the regular expression of this RegExpRole.
 51      The RegExpRole will expose a role for each of the named capture group of the pattern.
 52  */
 53  QString RegExpRole::pattern() const
 54  {
 55      return m_regularExpression.pattern();
 56  }
 57  
 58  void RegExpRole::setPattern(const QString& pattern)
 59  {
 60      if (m_regularExpression.pattern() == pattern)
 61          return;
 62  
 63      Q_EMIT namesAboutToBeChanged();
 64      m_regularExpression.setPattern(pattern);
 65      invalidate();
 66      Q_EMIT patternChanged();
 67      Q_EMIT namesChanged();
 68  }
 69  
 70  /*!
 71      \qmlproperty Qt::CaseSensitivity RegExpRole::caseSensitivity
 72  
 73      This property holds the caseSensitivity of the regular expression.
 74  */
 75  Qt::CaseSensitivity RegExpRole::caseSensitivity() const
 76  {
 77      return m_regularExpression.patternOptions() & QRegularExpression::CaseInsensitiveOption ?
 78                  Qt::CaseInsensitive : Qt::CaseSensitive;
 79  }
 80  
 81  void RegExpRole::setCaseSensitivity(Qt::CaseSensitivity caseSensitivity)
 82  {
 83      if (this->caseSensitivity() == caseSensitivity)
 84          return;
 85  
 86      m_regularExpression.setPatternOptions(m_regularExpression.patternOptions() ^ QRegularExpression::CaseInsensitiveOption); //toggle the option
 87      Q_EMIT caseSensitivityChanged();
 88  }
 89  
 90  QStringList RegExpRole::names()
 91  {
 92      QStringList nameCaptureGroups = m_regularExpression.namedCaptureGroups();
 93      nameCaptureGroups.removeAll("");
 94      return nameCaptureGroups;
 95  }
 96  
 97  QVariant RegExpRole::data(const QModelIndex& sourceIndex, const QQmlSortFilterProxyModel& proxyModel, const QString &name)
 98  {
 99      QString text = proxyModel.sourceData(sourceIndex, m_roleName).toString();
100      QRegularExpressionMatch match = m_regularExpression.match(text);
101      return match.hasMatch() ? (match.captured(name)) : QVariant{};
102  }
103  
104  }