src/frontends/qt4/validators.C

   1 /**
   2  * \file validators.C
   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  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11
  12 #include <config.h>
  13
  14 #include "validators.h"
  15 #include "qt_helpers.h"
  16
  17 #include "gettext.h"
  18 #include "lyxrc.h"
  19
  20 #include "frontends/Alert.h"
  21
  22 #include "frontends/controllers/Dialog.h"
  23
  24 #include "support/docstring.h"
  25 #include "support/lstrings.h"
  26 #include "support/std_ostream.h"
  27
  28 #include <QLineEdit>
  29 #include <QWidget>
  30
  31 #include <sstream>
  32
  33 using lyx::support::isStrDbl;
  34 using lyx::docstring;
  35
  36 using std::string;
  37
  38
  39 LengthValidator::LengthValidator(QWidget * parent)
  40         : QValidator(parent),
  41           no_bottom_(true), glue_length_(false)
  42 {}
  43
  44
  45 QValidator::State LengthValidator::validate(QString & qtext, int &) const
  46 {
  47         string const text = fromqstr(qtext);
  48         if (text.empty() || isStrDbl(text))
  49                 return QValidator::Acceptable;
  50
  51         if (glue_length_) {
  52                 LyXGlueLength gl;
  53                 return (isValidGlueLength(text, &gl)) ?
  54                         QValidator::Acceptable : QValidator::Intermediate;
  55                 }
  56
  57         LyXLength l;
  58         bool const valid_length = isValidLength(text, &l);
  59         if (!valid_length)
  60                 return QValidator::Intermediate;
  61
  62         if (no_bottom_)
  63                 return QValidator::Acceptable;
  64
  65         return b_.inPixels(100) <= l.inPixels(100) ?
  66                 QValidator::Acceptable : QValidator::Intermediate;
  67 }
  68
  69
  70 void LengthValidator::setBottom(LyXLength const & b)
  71 {
  72         b_ = b;
  73         no_bottom_ = false;
  74 }
  75
  76
  77 void LengthValidator::setBottom(LyXGlueLength const & g)
  78 {
  79         g_ = g;
  80         no_bottom_ = false;
  81         glue_length_ = true;
  82 }
  83
  84
  85 LengthValidator * unsignedLengthValidator(QLineEdit * ed)
  86 {
  87         LengthValidator * v = new LengthValidator(ed);
  88         v->setBottom(LyXLength());
  89         return v;
  90 }
  91
  92
  93 PathValidator::PathValidator(bool acceptable_if_empty,
  94                              QWidget * parent)
  95         : QValidator(parent),
  96           acceptable_if_empty_(acceptable_if_empty),
  97           latex_doc_(false),
  98           tex_allows_spaces_(false)
  99 {}
 100
 101
 102 namespace {
 103
 104 docstring const printable_list(docstring const & invalid_chars)
 105 {
 106         docstring s;
 107         docstring::const_iterator const begin = invalid_chars.begin();
 108         docstring::const_iterator const end = invalid_chars.end();
 109         docstring::const_iterator it = begin;
 110
 111         for (; it != end; ++it) {
 112                 if (it != begin)
 113                         s += lyx::from_ascii(", ");
 114                 if (*it == lyx::char_type(' '))
 115                         s += _("space");
 116                 else
 117                         s += *it;
 118         }
 119
 120         return s;
 121 }
 122
 123 } // namespace anon
 124
 125
 126 QValidator::State PathValidator::validate(QString & qtext, int &) const
 127 {
 128         if (!latex_doc_)
 129                 return QValidator::Acceptable;
 130
 131         docstring const text = lyx::support::trim(qstring_to_ucs4(qtext));
 132         if (text.empty())
 133                 return  acceptable_if_empty_ ?
 134                         QValidator::Acceptable : QValidator::Intermediate;
 135
 136         docstring invalid_chars = lyx::from_ascii("#$%{}()[]\"^");
 137         if (!tex_allows_spaces_)
 138                 invalid_chars += ' ';
 139
 140         if (text.find_first_of(invalid_chars) != docstring::npos) {
 141
 142                 static int counter = 0;
 143                 if (counter == 0) {
 144                         lyx::frontend::Alert::error(_("Invalid filename"),
 145                                      _("LyX does not provide LateX support for file names containing any of these characters:\n") +
 146                                          printable_list(invalid_chars));
 147                 }
 148                 ++counter;
 149                 return QValidator::Intermediate;
 150         }
 151
 152         return QValidator::Acceptable;
 153 }
 154
 155
 156 void PathValidator::setChecker(lyx::frontend::KernelDocType const & type,
 157                                LyXRC const & lyxrc)
 158 {
 159         latex_doc_ = type == lyx::frontend::Kernel::LATEX;
 160         tex_allows_spaces_ = lyxrc.tex_allows_spaces;
 161 }
 162
 163
 164 PathValidator * getPathValidator(QLineEdit * ed)
 165 {
 166         if (!ed)
 167                 return 0;
 168         QValidator * validator = const_cast<QValidator *>(ed->validator());
 169         if (!validator)
 170                 return 0;
 171         return dynamic_cast<PathValidator *>(validator);
 172 }
 173
 174 #include "validators_moc.cpp"