src/frontends/qt4/Validator.cpp

   1 /**
   2  * \file Validator.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Angus Leeming
   7  * \author Richard Heck
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12
  13 #include <config.h>
  14
  15 #include "Validator.h"
  16 #include "qt_helpers.h"
  17
  18 #include "support/gettext.h"
  19 #include "LyXRC.h"
  20
  21 #include "frontends/alert.h"
  22
  23 #include "support/docstring.h"
  24 #include "support/lstrings.h"
  25
  26 #include <QLineEdit>
  27 #include <QLocale>
  28 #include <QWidget>
  29
  30 using namespace std;
  31
  32 namespace lyx {
  33 namespace frontend {
  34
  35 LengthValidator::LengthValidator(QWidget * parent)
  36         : QValidator(parent),
  37           no_bottom_(true), glue_length_(false)
  38 {}
  39
  40
  41 QValidator::State LengthValidator::validate(QString & qtext, int &) const
  42 {
  43         bool ok;
  44         qtext.trimmed().toDouble(&ok);
  45         if (qtext.isEmpty() || ok)
  46                 return QValidator::Acceptable;
  47
  48         string const text = fromqstr(qtext);
  49
  50         if (glue_length_) {
  51                 GlueLength gl;
  52                 return (isValidGlueLength(text, &gl)) ?
  53                         QValidator::Acceptable : QValidator::Intermediate;
  54         }
  55
  56         Length l;
  57         bool const valid_length = isValidLength(text, &l);
  58         if (!valid_length)
  59                 return QValidator::Intermediate;
  60
  61         if (no_bottom_)
  62                 return QValidator::Acceptable;
  63
  64         return b_.inPixels(100) <= l.inPixels(100) ?
  65                 QValidator::Acceptable : QValidator::Intermediate;
  66 }
  67
  68
  69 void LengthValidator::setBottom(Length const & b)
  70 {
  71         b_ = b;
  72         no_bottom_ = false;
  73 }
  74
  75
  76 void LengthValidator::setBottom(GlueLength const & g)
  77 {
  78         g_ = g;
  79         no_bottom_ = false;
  80         glue_length_ = true;
  81 }
  82
  83
  84 LengthValidator * unsignedLengthValidator(QLineEdit * ed)
  85 {
  86         LengthValidator * v = new LengthValidator(ed);
  87         v->setBottom(Length());
  88         return v;
  89 }
  90
  91
  92 LengthValidator * unsignedGlueLengthValidator(QLineEdit * ed)
  93 {
  94         LengthValidator * v = new LengthValidator(ed);
  95         v->setBottom(GlueLength());
  96         return v;
  97 }
  98
  99
 100 LengthAutoValidator::LengthAutoValidator(QWidget * parent, QString const autotext)
 101         : LengthValidator(parent),
 102           autotext_(autotext)
 103 {}
 104
 105
 106 QValidator::State LengthAutoValidator::validate(QString & qtext, int & dummy) const
 107 {
 108         if (qtext == autotext_)
 109                 return QValidator::Acceptable;
 110         return LengthValidator::validate(qtext, dummy);
 111 }
 112
 113
 114 LengthAutoValidator * unsignedLengthAutoValidator(QLineEdit * ed, QString const autotext)
 115 {
 116         LengthAutoValidator * v = new LengthAutoValidator(ed, autotext);
 117         v->setBottom(Length());
 118         return v;
 119 }
 120
 121
 122 DoubleAutoValidator::DoubleAutoValidator(QWidget * parent, QString const autotext)
 123         : QDoubleValidator(parent),
 124           autotext_(autotext)
 125 {}
 126
 127
 128 DoubleAutoValidator::DoubleAutoValidator(double bottom,
 129                 double top, int decimals, QObject * parent)
 130         : QDoubleValidator(bottom, top, decimals, parent)
 131 {}
 132
 133
 134 QValidator::State DoubleAutoValidator::validate(QString & input, int & pos) const {
 135         if (input == autotext_)
 136                 return QValidator::Acceptable;
 137         return QDoubleValidator::validate(input, pos);
 138 }
 139
 140
 141 PathValidator::PathValidator(bool acceptable_if_empty,
 142                              QWidget * parent)
 143         : QValidator(parent),
 144           acceptable_if_empty_(acceptable_if_empty),
 145           latex_doc_(false),
 146           tex_allows_spaces_(false)
 147 {}
 148
 149
 150 static docstring const printable_list(docstring const & invalid_chars)
 151 {
 152         docstring s;
 153         docstring::const_iterator const begin = invalid_chars.begin();
 154         docstring::const_iterator const end = invalid_chars.end();
 155         docstring::const_iterator it = begin;
 156
 157         for (; it != end; ++it) {
 158                 if (it != begin)
 159                         s += ", ";
 160                 if (*it == ' ')
 161                         s += _("space");
 162                 else
 163                         s += *it;
 164         }
 165
 166         return s;
 167 }
 168
 169
 170 QValidator::State PathValidator::validate(QString & qtext, int &) const
 171 {
 172         if (!latex_doc_)
 173                 return QValidator::Acceptable;
 174
 175         docstring const text = support::trim(qstring_to_ucs4(qtext));
 176         if (text.empty())
 177                 return acceptable_if_empty_ ?
 178                         QValidator::Acceptable : QValidator::Intermediate;
 179
 180         docstring invalid_chars = from_ascii("#$%{}()[]\"^");
 181         if (!tex_allows_spaces_)
 182                 invalid_chars += ' ';
 183
 184         if (text.find_first_of(invalid_chars) != docstring::npos) {
 185
 186                 static int counter = 0;
 187                 if (counter == 0) {
 188                         Alert::error(_("Invalid filename"),
 189                                      _("LyX does not provide LaTeX support for file names containing any of these characters:\n") +
 190                                          printable_list(invalid_chars));
 191                 }
 192                 ++counter;
 193                 return QValidator::Intermediate;
 194         }
 195
 196         return QValidator::Acceptable;
 197 }
 198
 199
 200 void PathValidator::setChecker(KernelDocType const & type, LyXRC const & lyxrc)
 201 {
 202         latex_doc_ = type == LATEX;
 203         tex_allows_spaces_ = lyxrc.tex_allows_spaces;
 204 }
 205
 206
 207 PathValidator * getPathValidator(QLineEdit * ed)
 208 {
 209         if (!ed)
 210                 return 0;
 211         QValidator * validator = const_cast<QValidator *>(ed->validator());
 212         if (!validator)
 213                 return 0;
 214         return dynamic_cast<PathValidator *>(validator);
 215 }
 216
 217 } // namespace frontend
 218 } // namespace lyx
 219
 220 #include "moc_Validator.cpp"