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#include <QtGui>

#include "regexpdialog.h"

RegExpDialog::RegExpDialog(QWidget *parent)

    : QDialog(parent)

{

    patternComboBox = new QComboBox;

    patternComboBox->setEditable(true);

    patternComboBox->setSizePolicy(QSizePolicy::Expanding,

                                   QSizePolicy::Preferred);

    patternLabel = new QLabel(tr("&Pattern:"));

    patternLabel->setBuddy(patternComboBox);

    escapedPatternLineEdit = new QLineEdit;

    escapedPatternLineEdit->setReadOnly(true);

    QPalette palette = escapedPatternLineEdit->palette();

    palette.setBrush(QPalette::Base,

                     palette.brush(QPalette::Disabled, QPalette::Base));

    escapedPatternLineEdit->setPalette(palette);

    escapedPatternLabel = new QLabel(tr("&Escaped Pattern:"));

    escapedPatternLabel->setBuddy(escapedPatternLineEdit);

    syntaxComboBox = new QComboBox;

    syntaxComboBox->addItem(tr("Regular expression v1"), QRegExp::RegExp);

    syntaxComboBox->addItem(tr("Regular expression v2"), QRegExp::RegExp2);

    syntaxComboBox->addItem(tr("Wildcard"), QRegExp::Wildcard);

    syntaxComboBox->addItem(tr("Fixed string"), QRegExp::FixedString);

    syntaxComboBox->addItem(tr("W3C Xml Schema 1.1"), QRegExp::W3CXmlSchema11);

    syntaxLabel = new QLabel(tr("&Pattern Syntax:"));

    syntaxLabel->setBuddy(syntaxComboBox);

    textComboBox = new QComboBox;

    textComboBox->setEditable(true);

    textComboBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);

    textLabel = new QLabel(tr("&Text:"));

    textLabel->setBuddy(textComboBox);

    caseSensitiveCheckBox = new QCheckBox(tr("Case &Sensitive"));

    caseSensitiveCheckBox->setChecked(true);

    minimalCheckBox = new QCheckBox(tr("&Minimal"));

    indexLabel = new QLabel(tr("Index of Match:"));

    indexEdit = new QLineEdit;

    indexEdit->setReadOnly(true);

    matchedLengthLabel = new QLabel(tr("Matched Length:"));

    matchedLengthEdit = new QLineEdit;

    matchedLengthEdit->setReadOnly(true);

    for (int i = 0; i < MaxCaptures; ++i) {

        captureLabels[i] = new QLabel(tr("Capture %1:").arg(i));

        captureEdits[i] = new QLineEdit;

        captureEdits[i]->setReadOnly(true);

    }

    captureLabels[0]->setText(tr("Match:"));

    QHBoxLayout *checkBoxLayout = new QHBoxLayout;

    checkBoxLayout->addWidget(caseSensitiveCheckBox);

    checkBoxLayout->addWidget(minimalCheckBox);

    checkBoxLayout->addStretch(1);

    QGridLayout *mainLayout = new QGridLayout;

    mainLayout->addWidget(patternLabel, 0, 0);

    mainLayout->addWidget(patternComboBox, 0, 1);

    mainLayout->addWidget(escapedPatternLabel, 1, 0);

    mainLayout->addWidget(escapedPatternLineEdit, 1, 1);

    mainLayout->addWidget(syntaxLabel, 2, 0);

    mainLayout->addWidget(syntaxComboBox, 2, 1);

    mainLayout->addLayout(checkBoxLayout, 3, 0, 1, 2);

    mainLayout->addWidget(textLabel, 4, 0);

    mainLayout->addWidget(textComboBox, 4, 1);

    mainLayout->addWidget(indexLabel, 5, 0);

    mainLayout->addWidget(indexEdit, 5, 1);

    mainLayout->addWidget(matchedLengthLabel, 6, 0);

    mainLayout->addWidget(matchedLengthEdit, 6, 1);

    for (int j = 0; j < MaxCaptures; ++j) {

        mainLayout->addWidget(captureLabels[j], 7 + j, 0);

        mainLayout->addWidget(captureEdits[j], 7 + j, 1);

    }

    setLayout(mainLayout);

    connect(patternComboBox, SIGNAL(editTextChanged(const QString &)),

            this, SLOT(refresh()));

    connect(textComboBox, SIGNAL(editTextChanged(const QString &)),

            this, SLOT(refresh()));

    connect(caseSensitiveCheckBox, SIGNAL(toggled(bool)),

            this, SLOT(refresh()));

    connect(minimalCheckBox, SIGNAL(toggled(bool)), this, SLOT(refresh()));

    connect(syntaxComboBox, SIGNAL(currentIndexChanged(int)),

            this, SLOT(refresh()));

    patternComboBox->addItem(tr("[A-Za-z_]+([A-Za-z_0-9]*)"));

    textComboBox->addItem(tr("(10 + delta4) * 32"));

    setWindowTitle(tr("RegExp"));

    setFixedHeight(sizeHint().height());

    refresh();

}

void RegExpDialog::refresh()

{

    setUpdatesEnabled(false);

    QString pattern = patternComboBox->currentText();

    QString text = textComboBox->currentText();

    QString escaped = pattern;

    escaped.replace("\\", "\\\\");

    escaped.replace("\"", "\\\"");

    escaped.prepend("\"");

    escaped.append("\"");

    escapedPatternLineEdit->setText(escaped);

    QRegExp rx(pattern);

    Qt::CaseSensitivity cs = Qt::CaseInsensitive;

    if (caseSensitiveCheckBox->isChecked())

        cs = Qt::CaseSensitive;

    rx.setCaseSensitivity(cs);

    rx.setMinimal(minimalCheckBox->isChecked());

    QRegExp::PatternSyntax syntax = QRegExp::PatternSyntax(

            syntaxComboBox->itemData(syntaxComboBox->currentIndex()).toInt());

    rx.setPatternSyntax(syntax);

    QPalette palette = patternComboBox->palette();

    if (rx.isValid()) {

        palette.setColor(QPalette::Text,

                         textComboBox->palette().color(QPalette::Text));

    } else {

        palette.setColor(QPalette::Text, Qt::red);

    }

    patternComboBox->setPalette(palette);

    indexEdit->setText(QString::number(rx.indexIn(text)));

    matchedLengthEdit->setText(QString::number(rx.matchedLength()));

    for (int i = 0; i < MaxCaptures; ++i) {

        captureLabels[i]->setEnabled(i <= rx.numCaptures());

        captureEdits[i]->setEnabled(i <= rx.numCaptures());

        captureEdits[i]->setText(rx.cap(i));

    }

    setUpdatesEnabled(true);

}