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****************************************************************************/

#include "mainwindow.h"

#include <QFontComboBox>

#include <QFontDatabase>

#include <QFileDialog>

#include <QMessageBox>

#include <QListWidget>

#include <QDebug>

#include <QShortcut>

#include <QCompleter>

#include <QDirModel>

#include <QTextCodec>

QT_BEGIN_NAMESPACE

MainWindow::MainWindow(const QString &customFont)

{

    setupUi(this);

    pixelSize->setValue(QFontInfo(QFont()).pixelSize());

    populateCharacterRanges();

    {

        weightCombo->addItem(QLatin1String("Light"), QVariant(int(QFont::Light)));

        const int normalIdx = weightCombo->count();

        weightCombo->addItem(QLatin1String("Normal"), QVariant(int(QFont::Normal)));

        weightCombo->addItem(QLatin1String("DemiBold"), QVariant(int(QFont::DemiBold)));

        weightCombo->addItem(QLatin1String("Bold"), QVariant(int(QFont::Bold)));

        weightCombo->addItem(QLatin1String("Black"), QVariant(int(QFont::Black)));

        weightCombo->setCurrentIndex(normalIdx);

    }

    QShortcut *sc = new QShortcut(Qt::ControlModifier + Qt::Key_A, this);

    connect(sc, SIGNAL(activated()),

            this, SLOT(on_selectAll_clicked()));

    sc = new QShortcut(Qt::ControlModifier + Qt::Key_D, this);

    connect(sc, SIGNAL(activated()),

            this, SLOT(on_deselectAll_clicked()));

    sc = new QShortcut(Qt::ControlModifier + Qt::Key_I, this);

    connect(sc, SIGNAL(activated()),

            this, SLOT(on_invertSelection_clicked()));

    QCompleter *completer = new QCompleter(this);

    completer->setModel(new QDirModel(this));

    path->setCompleter(completer);

    path->setText(QDir::currentPath());

    completer = new QCompleter(this);

    completer->setModel(new QDirModel(this));

    sampleFile->setCompleter(completer);

    charCount->setText(QString());

    if (!customFont.isEmpty())

        addCustomFont(customFont);

    fontChanged();

    connect(fontComboBox, SIGNAL(currentFontChanged(QFont)),

            this, SLOT(fontChanged()));

    connect(pixelSize, SIGNAL(valueChanged(int)),

            this, SLOT(fontChanged()));

    connect(italic, SIGNAL(stateChanged(int)),

            this, SLOT(fontChanged()));

    connect(weightCombo, SIGNAL(currentIndexChanged(int)),

            this, SLOT(fontChanged()));

}

void MainWindow::on_actionAdd_Custom_Font_triggered()

{

    QString fontFile = QFileDialog::getOpenFileName(this, tr("Add Custom Font"));

    if (fontFile.isEmpty())

        return;

    addCustomFont(fontFile);

}

void MainWindow::on_selectAll_clicked()

{

    for (int i = 0; i < characterRangeView->count(); ++i)

        characterRangeView->item(i)->setCheckState(Qt::Checked);

}

void MainWindow::on_deselectAll_clicked()

{

    for (int i = 0; i < characterRangeView->count(); ++i)

        characterRangeView->item(i)->setCheckState(Qt::Unchecked);

}

void MainWindow::on_invertSelection_clicked()

{

    for (int i = 0; i < characterRangeView->count(); ++i) {

        QListWidgetItem *item = characterRangeView->item(i);

        if (item->checkState() == Qt::Checked)

            item->setCheckState(Qt::Unchecked);

        else

            item->setCheckState(Qt::Checked);

    }

}

void MainWindow::fontChanged()

{

    QFont f = preview->font();

    f.setStyleStrategy(QFont::NoFontMerging);

    f.setPixelSize(pixelSize->value());

    f.setFamily(fontComboBox->currentFont().family());

    f.setItalic(italic->isChecked());

    f.setWeight(weightCombo->itemData(weightCombo->currentIndex()).toInt());

    if (!preview->isModified()) {

        QFontDatabase db;

        QFontDatabase::WritingSystem ws = db.writingSystems(f.family()).value(0, QFontDatabase::Any);

        QString sample = db.writingSystemSample(ws);

        preview->setText(sample);

        preview->setModified(false);

    }

    fileName->setText(QPF::fileNameForFont(f));

    preview->setFont(f);

}

void MainWindow::on_browsePath_clicked()

{

    QString dir = QFileDialog::getExistingDirectory(this, tr("Select Directory"));

    if (!dir.isEmpty())

        path->setText(dir);

}

void MainWindow::on_browseSampleFile_clicked()

{

    QString dir = QFileDialog::getOpenFileName(this, tr("Select Sample File"));

    if (!dir.isEmpty()) {

        sampleFile->setText(dir);

        on_sampleFile_editingFinished();

    }

}

void MainWindow::on_generate_clicked()

{

    QFile f(path->text() + QDir::separator() + fileName->text());

    if (f.exists()) {

        if (QMessageBox::warning(this, QString(),

                                 tr("%1 already exists.\nDo you want to replace it?").arg(f.fileName()),

                                 QMessageBox::Yes | QMessageBox::No, QMessageBox::No)

            != QMessageBox::Yes) {

            statusBar()->showMessage(tr("Pre-rendering aborted..."));

            return;

        }

    }

    QList<QPF::CharacterRange> ranges;

    if (chooseFromSampleFile->isChecked()) {

        ranges = sampleFileRanges;

    } else if (chooseFromCodePoints->isChecked()) {

        ranges.clear();

        for (int i = 0; i < characterRangeView->count(); ++i) {

            QListWidgetItem *item = characterRangeView->item(i);

            if (item->checkState() != Qt::Checked)

                continue;

            QPF::CharacterRange range = qVariantValue<QPF::CharacterRange>(item->data(Qt::UserRole));

            ranges.append(range);

        }

    }

    const int generationOptions = QPF::IncludeCMap | QPF::RenderGlyphs;

    QByteArray qpf = QPF::generate(preview->font(), generationOptions, ranges);

    f.open(QIODevice::WriteOnly | QIODevice::Truncate);

    f.write(qpf);

    f.close();

    statusBar()->showMessage(tr("Font successfully pre-rendered to %1").arg(fileName->text()));

}

void MainWindow::on_sampleFile_editingFinished()

{

    sampleFileRanges.clear();

    QFile f(sampleFile->text());

    if (!f.open(QIODevice::ReadOnly | QIODevice::Text)) {

        sampleFileRanges.append(QPF::CharacterRange()); // default = all

        return;

    }

    QTextStream stream(&f);

    stream.setCodec(QTextCodec::codecForName("utf-8"));

    stream.setAutoDetectUnicode(true);

    QString text = stream.readAll();

    QSet<QChar> coverage;

    for (int i = 0; i < text.length(); ++i)

        coverage.insert(text.at(i));

    QList<QChar> sortedCoverage = QList<QChar>::fromSet(coverage);

    qSort(sortedCoverage);

    // play simple :)

    foreach (QChar ch, sortedCoverage) {

        QPF::CharacterRange r;

        r.start = ch.unicode();

        r.end = r.start + 1;

        sampleFileRanges.append(r);

    }

    charCount->setText(tr("(%1 unique characters found)").arg(sortedCoverage.count()));

}

void MainWindow::populateCharacterRanges()

{

    QFile f(":/Blocks.txt");

    if (!f.open(QIODevice::ReadOnly | QIODevice::Text))

        return;

    QRegExp rangeExpr("([0-9a-f]+)\\.\\.([0-9a-f]+); (.+)");

    rangeExpr.setCaseSensitivity(Qt::CaseInsensitive);

    QString ellipsis(QChar(0x2026));

    if (!characterRangeView->fontMetrics().inFont(ellipsis.at(0)))

        ellipsis = QLatin1String("...");

    while (!f.atEnd()) {

        QString line = QString::fromAscii(f.readLine());

        if (line.endsWith(QLatin1Char('\n')))

            line.chop(1);

        if (line.endsWith(QLatin1Char('\r')))

            line.chop(1);

        line = line.trimmed();

        if (line.isEmpty() || line.startsWith(QLatin1Char('#')))

            continue;

        if (!rangeExpr.exactMatch(line) || rangeExpr.captureCount() != 3)

            continue;

        QPF::CharacterRange range;

        bool ok = false;

        range.start = rangeExpr.cap(1).toUInt(&ok, /*base*/16);

        if (!ok)

            continue;

        range.end = rangeExpr.cap(2).toUInt(&ok, /*base*/16);

        if (!ok)

            continue;

        if (range.start >= 0xffff || range.end >= 0xffff)

            continue;

        QString description = rangeExpr.cap(3);

        QListWidgetItem *item = new QListWidgetItem(characterRangeView);

        QString text = description;

        text.append(QLatin1String(" ("));

        text.append(rangeExpr.cap(1));

        text.append(ellipsis);

        text.append(rangeExpr.cap(2));

        text.append(QLatin1String(")"));

        item->setText(text);

        item->setCheckState(Qt::Checked);

        item->setData(Qt::UserRole, qVariantFromValue(range));

    }

}

void MainWindow::addCustomFont(const QString &fontFile)

{

    int id = QFontDatabase::addApplicationFont(fontFile);

    if (id < 0) {

        QMessageBox::warning(this, tr("Error Adding Custom Font"),

                             tr("The custom font %s could not be loaded.").arg(fontFile));

        return;

    }

    const QStringList families = QFontDatabase::applicationFontFamilies(id);

    if (families.isEmpty()) {

        QMessageBox::warning(this, tr("Error Adding Custom Font"),

                             tr("The custom font %s provides no font families.").arg(fontFile));

        return;

    }

    QFont f(families.first());

    fontComboBox->setCurrentFont(f);

}

QT_END_NAMESPACE