blame: src/preferencesdialog.cpp

/*

MIT License

Copyright (c) 2026 Poul Sander

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

SOFTWARE.

*/

#include "preferencesdialog.h"

#include "shortcutmanager.h"

#include <QHBoxLayout>

#include <QLabel>

#include <QComboBox>

#include <QSpinBox>

#include <QCheckBox>

#include <QPushButton>

#include <QGroupBox>

#include <QTabWidget>

#include <QTableWidget>

#include <QKeySequenceEdit>

#include <QHeaderView>

PreferencesDialog::PreferencesDialog(QWidget *parent)

    : QDialog(parent)

{

    setWindowTitle(tr("Preferences"));

    setModal(true);

    setMinimumWidth(500);

    QVBoxLayout *mainLayout = new QVBoxLayout(this);

    QTabWidget *tabs = new QTabWidget(this);

    setupGeneralTab(tabs);

    setupShortcutsTab(tabs);

    mainLayout->addWidget(tabs);

    QHBoxLayout *buttonLayout = new QHBoxLayout;

    QPushButton *okButton = new QPushButton(tr("OK"));

    QPushButton *cancelButton = new QPushButton(tr("Cancel"));

    buttonLayout->addStretch();

    buttonLayout->addWidget(okButton);

    buttonLayout->addWidget(cancelButton);

    mainLayout->addLayout(buttonLayout);

    connect(okButton, &QPushButton::clicked, this, [this]() {

        if (m_resetLayoutCheck->isChecked())

            emit resetLayoutRequested();

        accept();

    });

    connect(cancelButton, &QPushButton::clicked, this, &QDialog::reject);

}

void PreferencesDialog::setupGeneralTab(QTabWidget *tabs)

{

    QWidget *page = new QWidget;

    QVBoxLayout *pageLayout = new QVBoxLayout(page);

    QGroupBox *imageGroup = new QGroupBox(tr("Image Viewer"), page);

    QVBoxLayout *groupLayout = new QVBoxLayout(imageGroup);

    QHBoxLayout *bgColorLayout = new QHBoxLayout;

    QLabel *bgColorLabel = new QLabel(tr("Background Color:"));

    m_backgroundColorCombo = new QComboBox;

    m_backgroundColorCombo->addItem(tr("Black"), "black");

    m_backgroundColorCombo->addItem(tr("White"), "white");

    m_backgroundColorCombo->addItem(tr("Dark Gray"), "darkgray");

    bgColorLayout->addWidget(bgColorLabel);

    bgColorLayout->addWidget(m_backgroundColorCombo);

    bgColorLayout->addStretch();

    groupLayout->addLayout(bgColorLayout);

    QHBoxLayout *cacheSizeLayout = new QHBoxLayout;

    QLabel *cacheSizeLabel = new QLabel(tr("Folder thumbnail cache (folders):"));

    m_cacheSizeSpinBox = new QSpinBox;

    m_cacheSizeSpinBox->setRange(1, 20);

    m_cacheSizeSpinBox->setValue(4);

    cacheSizeLayout->addWidget(cacheSizeLabel);

    cacheSizeLayout->addWidget(m_cacheSizeSpinBox);

    cacheSizeLayout->addStretch();

    groupLayout->addLayout(cacheSizeLayout);

    QHBoxLayout *thumbSizeLayout = new QHBoxLayout;

    QLabel *thumbSizeLabel = new QLabel(tr("Thumbnail cache size:"));

    m_thumbnailSizeCombo = new QComboBox;

    m_thumbnailSizeCombo->addItem(tr("Normal (128 px)"), "normal");

    m_thumbnailSizeCombo->addItem(tr("Large (256 px)"), "large");

    thumbSizeLayout->addWidget(thumbSizeLabel);

    thumbSizeLayout->addWidget(m_thumbnailSizeCombo);

    thumbSizeLayout->addStretch();

    groupLayout->addLayout(thumbSizeLayout);

    pageLayout->addWidget(imageGroup);

    QGroupBox *layoutGroup = new QGroupBox(tr("Layout"), page);

    QVBoxLayout *layoutGroupLayout = new QVBoxLayout(layoutGroup);

    m_lockDockingCheck = new QCheckBox(tr("Lock docking (prevent accidental moves)"));

    layoutGroupLayout->addWidget(m_lockDockingCheck);

    m_resetLayoutCheck = new QCheckBox(tr("Reset layout to default when closing the menu"));

    layoutGroupLayout->addWidget(m_resetLayoutCheck);

    pageLayout->addWidget(layoutGroup);

    pageLayout->addStretch();

    tabs->addTab(page, tr("General"));

}

void PreferencesDialog::setupShortcutsTab(QTabWidget *tabs)

{

    QWidget *page = new QWidget;

    QVBoxLayout *pageLayout = new QVBoxLayout(page);

    // Count configurable actions to size the table (plus 2 section header rows)

    int configurableCount = 0;

    for (int i = 0; i < ShortcutManager::ActionCount; ++i) {

        if (ShortcutManager::actionCategory(static_cast<ShortcutManager::Action>(i))

            != ShortcutManager::CatNotConfigurable)

            ++configurableCount;

    }

    // +2 for section headers (Image Viewer, Browser)

    const int totalRows = configurableCount + 2;

    m_shortcutsTable = new QTableWidget(totalRows, 2, page);

    m_shortcutsTable->setHorizontalHeaderLabels({tr("Action"), tr("Key")});

    m_shortcutsTable->horizontalHeader()->setStretchLastSection(true);

    m_shortcutsTable->horizontalHeader()->setSectionResizeMode(0, QHeaderView::Stretch);

    m_shortcutsTable->verticalHeader()->hide();

    m_shortcutsTable->setSelectionMode(QAbstractItemView::SingleSelection);

    m_rowToAction.clear();

    const ShortcutManager &mgr = ShortcutManager::instance();

    int row = 0;

    auto addSectionHeader = [&](const QString &title) {

        auto *item = new QTableWidgetItem(title);

        item->setFlags(Qt::NoItemFlags);

        QFont f = item->font();

        f.setBold(true);

        item->setFont(f);

        item->setBackground(palette().alternateBase());

        m_shortcutsTable->setItem(row, 0, item);

        auto *emptyItem = new QTableWidgetItem();

        emptyItem->setFlags(Qt::NoItemFlags);

        emptyItem->setBackground(palette().alternateBase());

        m_shortcutsTable->setItem(row, 1, emptyItem);

        m_rowToAction.append(-1); // -1 = section header

        ++row;

    };

    auto addAction = [&](ShortcutManager::Action action) {

        auto *descItem = new QTableWidgetItem(mgr.description(action));

        descItem->setFlags(descItem->flags() & ~Qt::ItemIsEditable);

        m_shortcutsTable->setItem(row, 0, descItem);

        auto *edit = new QKeySequenceEdit(mgr.shortcut(action));

#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)

        edit->setMaximumSequenceLength(1);

#endif

        connect(edit, &QKeySequenceEdit::keySequenceChanged, this, [this]() {

            highlightConflicts();

        });

        m_shortcutsTable->setCellWidget(row, 1, edit);

        m_rowToAction.append(static_cast<int>(action));

        ++row;

    };

    // Image Viewer section

    addSectionHeader(tr("Image Viewer"));

    for (int i = 0; i < ShortcutManager::ActionCount; ++i) {

        auto action = static_cast<ShortcutManager::Action>(i);

        if (ShortcutManager::actionCategory(action) == ShortcutManager::CatImageViewer)

            addAction(action);

    }

    // Browser section

    addSectionHeader(tr("Browser"));

    for (int i = 0; i < ShortcutManager::ActionCount; ++i) {

        auto action = static_cast<ShortcutManager::Action>(i);

        if (ShortcutManager::actionCategory(action) == ShortcutManager::CatBrowser)

            addAction(action);

    }

    pageLayout->addWidget(m_shortcutsTable);

    QHBoxLayout *btnLayout = new QHBoxLayout;

    QPushButton *resetBtn = new QPushButton(tr("Reset to Defaults"));

    btnLayout->addStretch();

    btnLayout->addWidget(resetBtn);

    pageLayout->addLayout(btnLayout);

    connect(resetBtn, &QPushButton::clicked, this, [this]() {

        for (int r = 0; r < m_rowToAction.size(); ++r) {

            int actionIdx = m_rowToAction[r];

            if (actionIdx < 0)

                continue;

            auto *edit = qobject_cast<QKeySequenceEdit *>(

                m_shortcutsTable->cellWidget(r, 1));

            if (edit)

                edit->setKeySequence(ShortcutManager::defaultShortcut(

                    static_cast<ShortcutManager::Action>(actionIdx)));

        }

        highlightConflicts();

    });

    tabs->addTab(page, tr("Shortcuts"));

}

void PreferencesDialog::highlightConflicts()

{

    // Group sequences by category, then detect conflicts within each category.

    // key: (category, sequenceString) → list of rows

    QMap<QPair<int,QString>, QList<int>> catSeqToRows;

    for (int r = 0; r < m_rowToAction.size(); ++r) {

        int actionIdx = m_rowToAction[r];

        if (actionIdx < 0)

            continue;

        auto *edit = qobject_cast<QKeySequenceEdit *>(

            m_shortcutsTable->cellWidget(r, 1));

        if (!edit)

            continue;

        QString s = edit->keySequence().toString();

        if (!s.isEmpty()) {

            int cat = ShortcutManager::actionCategory(

                static_cast<ShortcutManager::Action>(actionIdx));

            catSeqToRows[{cat, s}].append(r);

        }

    }

    // Reset all backgrounds

    for (int r = 0; r < m_rowToAction.size(); ++r) {

        if (m_rowToAction[r] < 0)

            continue;

        QTableWidgetItem *item = m_shortcutsTable->item(r, 0);

        if (item)

            item->setBackground(QBrush());

    }

    // Highlight conflicts (only within same category)

    for (auto it = catSeqToRows.cbegin(); it != catSeqToRows.cend(); ++it) {

        if (it.value().size() > 1) {

            for (int r : it.value()) {

                QTableWidgetItem *item = m_shortcutsTable->item(r, 0);

                if (item)

                    item->setBackground(QColor(255, 100, 100, 80));

            }

        }

    }

}

QMap<int, QKeySequence> PreferencesDialog::getShortcuts() const

{

    QMap<int, QKeySequence> map;

    for (int r = 0; r < m_rowToAction.size(); ++r) {

        int actionIdx = m_rowToAction[r];

        if (actionIdx < 0)

            continue;

        auto *edit = qobject_cast<QKeySequenceEdit *>(

            m_shortcutsTable->cellWidget(r, 1));

        if (edit)

            map[actionIdx] = edit->keySequence();

    }

    return map;

}

void PreferencesDialog::setShortcuts(const QMap<int, QKeySequence> &map)

{

    for (int r = 0; r < m_rowToAction.size(); ++r) {

        int actionIdx = m_rowToAction[r];

        if (actionIdx < 0)

            continue;

        if (!map.contains(actionIdx))

            continue;

        auto *edit = qobject_cast<QKeySequenceEdit *>(

            m_shortcutsTable->cellWidget(r, 1));

        if (edit)

            edit->setKeySequence(map[actionIdx]);

    }

    highlightConflicts();

}

QString PreferencesDialog::getBackgroundColor() const

{

    return m_backgroundColorCombo->currentData().toString();

}

void PreferencesDialog::setBackgroundColor(const QString &color)

{

    int index = m_backgroundColorCombo->findData(color);

    if (index >= 0)

        m_backgroundColorCombo->setCurrentIndex(index);

}

int PreferencesDialog::getCacheSize() const

{

    return m_cacheSizeSpinBox->value();

}

void PreferencesDialog::setCacheSize(int n)

{

    m_cacheSizeSpinBox->setValue(n);

}

QString PreferencesDialog::getThumbnailCacheSize() const

{

    return m_thumbnailSizeCombo->currentData().toString();

}

void PreferencesDialog::setThumbnailCacheSize(const QString &size)

{

    int index = m_thumbnailSizeCombo->findData(size);

    if (index >= 0)

        m_thumbnailSizeCombo->setCurrentIndex(index);

}

bool PreferencesDialog::getLockDocking() const

{

    return m_lockDockingCheck->isChecked();

}

void PreferencesDialog::setLockDocking(bool lock)

{

    m_lockDockingCheck->setChecked(lock);

}

bool PreferencesDialog::getResetLayout() const

{

    return m_resetLayoutCheck->isChecked();

}

void PreferencesDialog::setResetLayout(bool reset)

{

    m_resetLayoutCheck->setChecked(reset);

}