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@ -10,9 +10,14 @@
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#include <KPluginFactory>
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#include <KDecoration3/DecoratedWindow>
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#include <KDecoration3/DecorationSettings>
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#include <KDecoration3/DecorationShadow>
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#include <QFontMetricsF>
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#include <QImageReader>
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#include <QPainter>
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#include <QRadialGradient>
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#include <cmath>
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K_PLUGIN_FACTORY_WITH_JSON(CutefishDecorationFactory, "cutefishos.json",
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registerPlugin<Cutefish::Decoration>();)
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@ -20,10 +25,23 @@ K_PLUGIN_FACTORY_WITH_JSON(CutefishDecorationFactory, "cutefishos.json",
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namespace Cutefish
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{
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static int s_decorationCount = 0;
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static int s_shadowRadius = -1;
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static std::shared_ptr<KDecoration3::DecorationShadow> s_shadow;
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Decoration::Decoration(QObject *parent, const QVariantList &args)
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: KDecoration3::Decoration(parent, args)
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, m_themeSettings(QSettings::UserScope, QStringLiteral("cutefishos"), QStringLiteral("theme"))
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{
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++s_decorationCount;
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}
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Decoration::~Decoration()
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{
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if (--s_decorationCount == 0) {
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s_shadow.reset();
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s_shadowRadius = -1;
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}
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}
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bool Decoration::init()
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@ -32,14 +50,8 @@ bool Decoration::init()
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return false;
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}
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m_devicePixelRatio = m_themeSettings.value(QStringLiteral("PixelRatio"), 1.0).toReal();
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if (m_devicePixelRatio <= 0) {
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m_devicePixelRatio = 1.0;
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}
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m_frameRadius = qRound(11 * m_devicePixelRatio);
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updateColors();
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updateButtonPixmaps();
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m_themeSettingsFile = m_themeSettings.fileName();
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reloadTheme();
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m_leftButtons = new KDecoration3::DecorationButtonGroup(
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KDecoration3::DecorationButtonGroup::Position::Left, this, &Button::create);
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@ -49,6 +61,11 @@ bool Decoration::init()
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auto window = this->window();
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connect(window, &KDecoration3::DecoratedWindow::captionChanged, this, [this] { update(); });
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connect(window, &KDecoration3::DecoratedWindow::activeChanged, this, [this] { update(); });
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connect(window, &KDecoration3::DecoratedWindow::shadedChanged, this, [this] {
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updateGeometry();
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updateButtonsGeometry();
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update();
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});
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connect(window, &KDecoration3::DecoratedWindow::maximizedChanged, this, [this] {
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updateGeometry();
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updateButtonsGeometry();
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@ -69,13 +86,34 @@ bool Decoration::init()
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updateButtonsGeometry();
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update();
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});
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connect(settings().get(), &KDecoration3::DecorationSettings::decorationButtonsLeftChanged, this,
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[this] { updateButtonsGeometry(); });
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connect(settings().get(), &KDecoration3::DecorationSettings::decorationButtonsRightChanged, this,
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[this] { updateButtonsGeometry(); });
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connect(settings().get(), &KDecoration3::DecorationSettings::reconfigured, this, [this] {
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reloadTheme();
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updateGeometry();
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updateButtonsGeometry();
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update();
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});
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}
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// Follow the CutefishOS theme settings (dark mode, scaling) while the window is open.
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if (!m_themeSettingsFile.isEmpty()) {
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m_themeWatcher.addPath(m_themeSettingsFile);
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connect(&m_themeWatcher, &QFileSystemWatcher::fileChanged, this, [this] {
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reloadTheme();
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updateGeometry();
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updateButtonsGeometry();
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update();
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// Editors replace the file instead of writing in place, which drops the watch.
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if (!m_themeWatcher.files().contains(m_themeSettingsFile)) {
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m_themeWatcher.addPath(m_themeSettingsFile);
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}
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});
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}
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updateGeometry();
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updateButtonsGeometry();
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return true;
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@ -83,30 +121,33 @@ bool Decoration::init()
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void Decoration::paint(QPainter *painter, const QRectF &repaintArea)
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{
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Q_UNUSED(repaintArea)
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if (!window()) {
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return;
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}
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painter->save();
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painter->setRenderHint(QPainter::Antialiasing);
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painter->setPen(Qt::NoPen);
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painter->setBrush(titleBarBackgroundColor());
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if (!window()->isShaded() && !window()->isMaximized()) {
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painter->drawRoundedRect(rect(), m_frameRadius, m_frameRadius);
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} else {
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painter->drawRect(rect());
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if (!window()->isShaded()) {
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painter->save();
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painter->setRenderHint(QPainter::Antialiasing);
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painter->setPen(Qt::NoPen);
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painter->setBrush(titleBarBackgroundColor());
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const bool rounded = !window()->isMaximized()
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&& (!settings() || settings()->isAlphaChannelSupported());
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if (rounded) {
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painter->drawRoundedRect(rect(), m_frameRadius, m_frameRadius);
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} else {
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painter->drawRect(rect());
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}
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painter->restore();
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if (m_leftButtons) {
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m_leftButtons->paint(painter, repaintArea);
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}
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if (m_rightButtons) {
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m_rightButtons->paint(painter, repaintArea);
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}
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}
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painter->restore();
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if (m_leftButtons) {
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m_leftButtons->paint(painter, repaintArea);
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}
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if (m_rightButtons) {
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m_rightButtons->paint(painter, repaintArea);
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}
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paintCaption(painter);
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}
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@ -141,21 +182,102 @@ void Decoration::updateButtonsGeometry()
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m_rightButtons->setPos(QPointF(size().width() - m_rightButtons->geometry().width() - 2, 0));
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}
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void Decoration::updateColors()
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void Decoration::updateShadow()
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{
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// The theme settings are intentionally read once per decoration. KWin creates a new
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// decoration when the window/theme is reconfigured, avoiding a dependency on KDE5 APIs.
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if (s_shadow && s_shadowRadius == m_frameRadius) {
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setShadow(s_shadow);
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return;
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}
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const int shadowSize = 90;
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const int shadowStrength = 35;
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const QColor shadowColor = Qt::black;
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const int shadowOverlap = m_frameRadius;
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const int shadowOffset = shadowOverlap / 2;
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QImage image(2 * shadowSize, 2 * shadowSize, QImage::Format_ARGB32_Premultiplied);
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image.fill(Qt::transparent);
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// Gaussian delta function used to fade the shadow out.
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auto alpha = [](qreal x) { return std::exp(-x * x / 0.15); };
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auto gradientStopColor = [](QColor color, int alpha) {
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color.setAlpha(alpha);
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return color;
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};
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QRadialGradient radialGradient(shadowSize, shadowSize, shadowSize);
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for (int i = 0; i < 10; ++i) {
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const qreal x(qreal(i) / 9);
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radialGradient.setColorAt(x, gradientStopColor(shadowColor, alpha(x) * shadowStrength));
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}
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radialGradient.setColorAt(1, gradientStopColor(shadowColor, 0));
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QPainter painter(&image);
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painter.setRenderHint(QPainter::Antialiasing, true);
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painter.fillRect(image.rect(), radialGradient);
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const QRectF innerRect(shadowSize - shadowOverlap,
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shadowSize - shadowOffset - shadowOverlap,
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2 * shadowOverlap,
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shadowOffset + 2 * shadowOverlap);
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// Contrast pixel around the window.
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painter.setPen(gradientStopColor(shadowColor, shadowStrength * 0.5));
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painter.setBrush(Qt::NoBrush);
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painter.drawRoundedRect(innerRect, -0.5 + m_frameRadius, -0.5 + m_frameRadius);
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// Mask out the area covered by the window itself.
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painter.setPen(Qt::NoPen);
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painter.setBrush(Qt::black);
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painter.setCompositionMode(QPainter::CompositionMode_DestinationOut);
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painter.drawRoundedRect(innerRect, 0.5 + m_frameRadius, 0.5 + m_frameRadius);
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painter.end();
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s_shadow = std::make_shared<KDecoration3::DecorationShadow>();
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s_shadow->setPadding(QMarginsF(shadowSize - shadowOverlap,
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shadowSize - shadowOffset - shadowOverlap,
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shadowSize - shadowOverlap,
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shadowSize - shadowOverlap));
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s_shadow->setInnerShadowRect(QRectF(shadowSize, shadowSize, 1, 1));
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s_shadow->setShadow(image);
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s_shadowRadius = m_frameRadius;
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setShadow(s_shadow);
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}
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void Decoration::reloadTheme()
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{
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m_themeSettings.sync();
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m_devicePixelRatio = m_themeSettings.value(QStringLiteral("PixelRatio"), 1.0).toReal();
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if (m_devicePixelRatio <= 0) {
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m_devicePixelRatio = 1.0;
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}
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m_darkMode = m_themeSettings.value(QStringLiteral("DarkMode"), false).toBool();
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m_frameRadius = qRound(11 * m_devicePixelRatio);
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updateButtonPixmaps();
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updateShadow();
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}
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void Decoration::updateButtonPixmaps()
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{
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const auto load = [](const QString &path) {
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return QPixmap(path);
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};
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m_closeBtnPixmap = load(pixmapPath(KDecoration3::DecorationButtonType::Close, false));
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m_maximizeBtnPixmap = load(pixmapPath(KDecoration3::DecorationButtonType::Maximize, false));
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m_minimizeBtnPixmap = load(pixmapPath(KDecoration3::DecorationButtonType::Minimize, false));
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m_restoreBtnPixmap = load(pixmapPath(KDecoration3::DecorationButtonType::Maximize, true));
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m_closeBtnPixmap = loadPixmap(pixmapPath(KDecoration3::DecorationButtonType::Close, false));
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m_maximizeBtnPixmap = loadPixmap(pixmapPath(KDecoration3::DecorationButtonType::Maximize, false));
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m_minimizeBtnPixmap = loadPixmap(pixmapPath(KDecoration3::DecorationButtonType::Minimize, false));
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m_restoreBtnPixmap = loadPixmap(pixmapPath(KDecoration3::DecorationButtonType::Maximize, true));
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}
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QPixmap Decoration::loadPixmap(const QString &path) const
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{
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QImageReader reader(path);
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if (!reader.canRead()) {
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return {};
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}
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// The icons are SVGs, render them at the size the buttons are painted with.
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reader.setScaledSize(QSize(24, 24) * m_devicePixelRatio);
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return QPixmap::fromImage(reader.read());
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}
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QPixmap Decoration::buttonPixmap(KDecoration3::DecorationButtonType type, bool checked) const
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@ -197,11 +319,6 @@ int Decoration::titleBarHeight() const
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return qMax(1, qRound(m_titleBarHeight * m_devicePixelRatio));
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}
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bool Decoration::darkMode() const
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{
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return m_themeSettings.value(QStringLiteral("DarkMode"), false).toBool();
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}
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QColor Decoration::titleBarBackgroundColor() const
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{
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return darkMode() ? m_titleBarBgDarkColor : m_titleBarBgColor;
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Reion Wong
4 weeks ago