src/ui/themes.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /** \file
   3  * Gtk <themes> helper code.
   4  */
   5 /*
   6  * Authors:
   7  *   Jabiertxof
   8  *   Martin Owens
   9  *
  10  * Copyright (C) 2017-2021 Authors
  11  *
  12  * Released under GNU GPL v2+, read the file 'COPYING' for more information.
  13  */
  14
  15 #ifndef UI_THEMES_H_SEEN
  16 #define UI_THEMES_H_SEEN
  17
  18 #include <map>
  19 #include <memory>
  20 #include <vector>
  21 #include <sigc++/signal.h>
  22 #include <glibmm/refptr.h>
  23 #include <glibmm/ustring.h>
  24 #include <pangomm/fontdescription.h>
  25
  26 #include "preferences.h"
  27
  28 namespace Gtk {
  29 class CssProvider;
  30 class Window;
  31 } // namespace Gtk
  32
  33 namespace Inkscape::UI {
  34
  35 class ThemeContext final
  36 {
  37 public:
  38     ThemeContext();
  39     ~ThemeContext();
  40
  41     // Name of theme -> has dark theme
  42     typedef std::map<Glib::ustring, bool> gtkThemeList;
  43     void inkscape_fill_gtk(const gchar *path, gtkThemeList &themes);
  44
  45     std::map<Glib::ustring, bool> get_available_themes();
  46     void add_gtk_css(bool only_providers, bool cached = false);
  47     void add_icon_theme();
  48     Glib::ustring get_symbolic_colors();
  49
  50     Glib::RefPtr<Gtk::CssProvider> const &getColorizeProvider     () const { return _colorizeprovider     ; }
  51     Glib::RefPtr<Gtk::CssProvider> const &getContrastThemeProvider() const { return _contrastthemeprovider; }
  52     Glib::RefPtr<Gtk::CssProvider> const &getThemeProvider        () const { return _themeprovider        ; }
  53     Glib::RefPtr<Gtk::CssProvider> const &getStyleProvider        () const { return _styleprovider        ; }
  54     Glib::RefPtr<Gtk::CssProvider> const &getUserProvider         () const { return _userprovider         ; }
  55
  56     sigc::signal<void ()> getChangeThemeSignal() { return _signal_change_theme;}
  57     void themechangecallback();
  58
  59     /// Set application-wide font size adjustment by a factor, where 1 is 100% (no change)
  60     void adjustGlobalFontScale(double factor);
  61
  62     /// Get current font scaling factor (50 - 150, percent of "normal" size)
  63     double getFontScale() const;
  64
  65     /// Save font scaling factor in preferences
  66     void saveFontScale(double scale);
  67
  68     static Glib::ustring get_font_scale_pref_path() { return "/theme/fontscale"; }
  69
  70     /// User-selected monospaced font used by XML dialog and attribute editor
  71     Pango::FontDescription getMonospacedFont() const;
  72     void saveMonospacedFont(Pango::FontDescription desc);
  73     static Glib::ustring get_monospaced_font_pref_path() { return "/ui/mono-font/desc"; }
  74
  75     // True if current theme (applied one) is dark
  76     bool isCurrentThemeDark(Gtk::Window *window);
  77
  78     // Get CSS foreground colors resulting from classes ".highlight-color-[1-8]"
  79     static std::vector<guint32> getHighlightColors(Gtk::Window *window);
  80
  81     static void initialize_source_syntax_styles();
  82     static void select_default_syntax_style(bool dark_theme);
  83
  84 private:
  85     // user change theme
  86     sigc::signal<void ()> _signal_change_theme;
  87     Glib::RefPtr<Gtk::CssProvider> _styleprovider;
  88     Glib::RefPtr<Gtk::CssProvider> _themeprovider;
  89     Glib::RefPtr<Gtk::CssProvider> _contrastthemeprovider;
  90     Glib::RefPtr<Gtk::CssProvider> _colorizeprovider;
  91     Glib::RefPtr<Gtk::CssProvider> _spinbuttonprovider;
  92     Glib::RefPtr<Gtk::CssProvider> _userprovider;
  93 #if __APPLE__
  94     Glib::RefPtr<Gtk::CssProvider> _macstyleprovider;
  95 #endif
  96     std::unique_ptr<Preferences::Observer> _spinbutton_observer;
  97     Glib::RefPtr<Gtk::CssProvider> _fontsizeprovider;
  98 };
  99
 100 } // namespace Inkscape::UI
 101
 102 #endif /* !UI_THEMES_H_SEEN */
 103
 104 /*
 105   Local Variables:
 106   mode:c++
 107   c-file-style:"stroustrup"
 108   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 109   indent-tabs-mode:nil
 110   fill-column:99
 111   End:
 112 */
 113 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :