summaryrefslogtreecommitdiffstats
path: root/Source/QtDialog/RegexExplorer.cxx
blob: dfcf048d184c085e94ff7e1895b693e35234c8a2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2015 Kitware, Inc., Gregor Jasny

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/

#include "RegexExplorer.h"

RegexExplorer::RegexExplorer(QWidget* p) : QDialog(p), m_matched(false)
{
  this->setupUi(this);

  for(int i = 1; i < cmsys::RegularExpression::NSUBEXP; ++i)
    {
    matchNumber->addItem(
      QString("Match %1").arg(QString::number(i)),
      QVariant(i));
    }
  matchNumber->setCurrentIndex(0);
}

void RegexExplorer::setStatusColor(QWidget* widget, bool successful)
{
  QColor color = successful ? QColor(0, 127, 0) : Qt::red;

  QPalette palette = widget->palette();
  palette.setColor(QPalette::Foreground, color);
  widget->setPalette(palette);
}

void RegexExplorer::on_regularExpression_textChanged(const QString& text)
{
#ifdef QT_NO_STL
  m_regex = text.toAscii().constData();
#else
  m_regex = text.toStdString();
#endif

  bool validExpression =
    stripEscapes(m_regex) && m_regexParser.compile(m_regex);
  if(!validExpression)
    {
    m_regexParser.set_invalid();
    }

  setStatusColor(labelRegexValid, validExpression);

  on_inputText_textChanged();
}

void RegexExplorer::on_inputText_textChanged()
{
  if(m_regexParser.is_valid())
    {
    QString plainText = inputText->toPlainText();
#ifdef QT_NO_STL
    m_text = plainText.toAscii().constData();
#else
    m_text = plainText.toStdString();
#endif
    m_matched = m_regexParser.find(m_text);
    }
  else
    {
    m_matched = false;
    }

  setStatusColor(labelRegexMatch, m_matched);

  if(!m_matched)
    {
    clearMatch();
    return;
    }

#ifdef QT_NO_STL
  QString matchText = m_regexParser.match(0).c_str();
#else
  QString matchText = QString::fromStdString(m_regexParser.match(0));
#endif
  match0->setPlainText(matchText);

  on_matchNumber_currentIndexChanged(matchNumber->currentIndex());
}

void RegexExplorer::on_matchNumber_currentIndexChanged(int index)
{
  if(!m_matched)
    {
    return;
    }

  QVariant itemData = matchNumber->itemData(index);
  int idx = itemData.toInt();

  if(idx < 1 || idx >= cmsys::RegularExpression::NSUBEXP)
    {
    return;
    }

#ifdef QT_NO_STL
  QString match = m_regexParser.match(idx).c_str();
#else
  QString match = QString::fromStdString(m_regexParser.match(idx));
#endif
  matchN->setPlainText(match);
}

void RegexExplorer::clearMatch()
{
  match0->clear();
  matchN->clear();
}

bool RegexExplorer::stripEscapes(std::string& source)
{
  const char* in = source.c_str();

  std::string result;
  result.reserve(source.size());

  for(char inc = *in; inc != '\0'; inc = *++in)
    {
    if(inc == '\\')
      {
      char nextc = in[1];
      if(nextc == 't')
        {
        result.append(1, '\t');
        in++;
        }
      else if(nextc == 'n')
        {
        result.append(1, '\n');
        in++;
        }
      else if(nextc == 't')
        {
        result.append(1, '\t');
        in++;
        }
      else if(isalnum(nextc) || nextc == '\0')
        {
        return false;
        }
      else
        {
        result.append(1, nextc);
        in++;
        }
      }
    else
      {
        result.append(1, inc);
      }
    }

    source = result;
    return true;
}