1 files changed, 107 insertions, 0 deletions
diff --git a/src/ui/themes.h b/src/ui/themes.h
new file mode 100644
index 0000000..a463279
--- /dev/null
+++ b/src/ui/themes.h
@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** \file
+ * Gtk <themes> helper code.
+ */
+/*
+ * Authors:
+ *   Jabiertxof
+ *   Martin Owens
+ *
+ * Copyright (C) 2017-2021 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+#ifndef UI_THEMES_H_SEEN
+#define UI_THEMES_H_SEEN
+
+#include <cstring>
+#include <glibmm.h>
+#include <glibmm/ustring.h>
+#include <gtkmm.h>
+#include <map>
+#include <pangomm/fontdescription.h>
+#include <utility>
+#include <vector>
+#include <sigc++/signal.h>
+#include "preferences.h"
+
+namespace Inkscape {
+namespace UI {
+
+/**
+ * A simple mediator class that sets the state of a Gtk::ToggleToolButton when
+ * a preference is changed.  Unlike the PrefPusher class, this does not provide
+ * the reverse process, so you still need to write your own handler for the
+ * "toggled" signal on the ToggleToolButton.
+ */
+typedef std::map<Glib::ustring, bool> gtkThemeList;
+class ThemeContext
+{
+public:
+    ThemeContext();
+    ~ThemeContext() = default;
+    // Name of theme -> has dark theme
+    typedef std::map<Glib::ustring, bool> gtkThemeList;
+    void inkscape_fill_gtk(const gchar *path, gtkThemeList &themes);
+    std::map<Glib::ustring, bool> get_available_themes();
+    void add_gtk_css(bool only_providers, bool cached = false);
+    void add_icon_theme();
+    Glib::ustring get_symbolic_colors();
+    Glib::RefPtr<Gtk::CssProvider> getColorizeProvider() { return _colorizeprovider;}
+    Glib::RefPtr<Gtk::CssProvider> getContrastThemeProvider() { return _contrastthemeprovider;}
+    Glib::RefPtr<Gtk::CssProvider> getThemeProvider() { return _themeprovider;}
+    Glib::RefPtr<Gtk::CssProvider> getStyleProvider() { return _styleprovider;}
+    Glib::RefPtr<Gtk::CssProvider> getUserProvider() { return _userprovider;}
+    sigc::signal<void ()> getChangeThemeSignal() { return _signal_change_theme;}
+    void themechangecallback();
+    /// Set application-wide font size adjustment by a factor, where 1 is 100% (no change)
+    void adjustGlobalFontScale(double factor);
+    /// Get current font scaling factor (50 - 150, percent of "normal" size)
+    double getFontScale() const;
+    /// Save font scaling factor in preferences
+    void saveFontScale(double scale);
+    static Glib::ustring get_font_scale_pref_path() { return "/theme/fontscale"; }
+
+    /// User-selected monospaced font used by XML dialog and attribute editor
+    Pango::FontDescription getMonospacedFont() const;
+    void saveMonospacedFont(Pango::FontDescription desc);
+    static Glib::ustring get_monospaced_font_pref_path() { return "/ui/mono-font/desc"; }
+
+    // True if current theme (applied one) is dark
+    bool isCurrentThemeDark(Gtk::Container *window);
+
+static std::vector<guint32> getHighlightColors(Gtk::Window *window);
+
+    static void initialize_source_syntax_styles();
+    static void select_default_syntax_style(bool dark_theme);
+
+private:
+    // user change theme
+    sigc::signal<void ()> _signal_change_theme;
+    Glib::RefPtr<Gtk::CssProvider> _styleprovider;
+    Glib::RefPtr<Gtk::CssProvider> _themeprovider;
+    Glib::RefPtr<Gtk::CssProvider> _contrastthemeprovider;
+    Glib::RefPtr<Gtk::CssProvider> _colorizeprovider;
+    Glib::RefPtr<Gtk::CssProvider> _spinbuttonprovider;
+    Glib::RefPtr<Gtk::CssProvider> _userprovider;
+#if __APPLE__
+    Glib::RefPtr<Gtk::CssProvider> _macstyleprovider;
+#endif
+    std::unique_ptr<Preferences::Observer> _spinbutton_observer;
+    Glib::RefPtr<Gtk::CssProvider> _fontsizeprovider = Gtk::CssProvider::create();
+};
+
+}
+}
+#endif /* !UI_THEMES_H_SEEN */
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :