diff options
| -rw-r--r-- | src/plugins/platformthemes/gtk3/qgtk3theme.cpp | 42 | ||||
| -rw-r--r-- | src/plugins/platformthemes/gtk3/qgtk3theme.h | 2 |
2 files changed, 44 insertions, 0 deletions
diff --git a/src/plugins/platformthemes/gtk3/qgtk3theme.cpp b/src/plugins/platformthemes/gtk3/qgtk3theme.cpp index 93520344f8..a47720384c 100644 --- a/src/plugins/platformthemes/gtk3/qgtk3theme.cpp +++ b/src/plugins/platformthemes/gtk3/qgtk3theme.cpp @@ -41,6 +41,7 @@ #include "qgtk3dialoghelpers.h" #include "qgtk3menu.h" #include <QVariant> +#include <QtCore/qregularexpression.h> #undef signals #include <gtk/gtk.h> @@ -147,6 +148,47 @@ QString QGtk3Theme::gtkFontName() const return QGnomeTheme::gtkFontName(); } +QPlatformTheme::Appearance QGtk3Theme::appearance() const +{ + /* + https://docs.gtk.org/gtk3/running.html + + It's possible to set a theme variant after the theme name when using GTK_THEME: + + GTK_THEME=Adwaita:dark + + Some themes also have "-dark" as part of their name. + + We test this environment variable first because the documentation says + it's mainly used for easy debugging, so it should be possible to use it + to override any other settings. + */ + QString themeName = qEnvironmentVariable("GTK_THEME"); + const QRegularExpression darkRegex(QStringLiteral("[:-]dark"), QRegularExpression::CaseInsensitiveOption); + if (!themeName.isEmpty()) + return darkRegex.match(themeName).hasMatch() ? Appearance::Dark : Appearance::Light; + + /* + https://docs.gtk.org/gtk3/property.Settings.gtk-application-prefer-dark-theme.html + + This setting controls which theme is used when the theme specified by + gtk-theme-name provides both light and dark variants. We can save a + regex check by testing this property first. + */ + const auto preferDark = gtkSetting<bool>("gtk-application-prefer-dark-theme"); + if (preferDark) + return Appearance::Dark; + + /* + https://docs.gtk.org/gtk3/property.Settings.gtk-theme-name.html + */ + themeName = gtkSetting("gtk-theme-name"); + if (!themeName.isEmpty()) + return darkRegex.match(themeName).hasMatch() ? Appearance::Dark : Appearance::Light; + + return Appearance::Unknown; +} + bool QGtk3Theme::usePlatformNativeDialog(DialogType type) const { switch (type) { diff --git a/src/plugins/platformthemes/gtk3/qgtk3theme.h b/src/plugins/platformthemes/gtk3/qgtk3theme.h index 54296d2ff1..5f439067af 100644 --- a/src/plugins/platformthemes/gtk3/qgtk3theme.h +++ b/src/plugins/platformthemes/gtk3/qgtk3theme.h @@ -52,6 +52,8 @@ public: virtual QVariant themeHint(ThemeHint hint) const override; virtual QString gtkFontName() const override; + Appearance appearance() const override; + bool usePlatformNativeDialog(DialogType type) const override; QPlatformDialogHelper *createPlatformDialogHelper(DialogType type) const override; |