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sys/glib: general cleanup, use C++ principles, add more suffixes
author Paper <paper@paper.us.eu.org>
date Sun, 14 Jul 2024 19:12:40 -0400
parents ac1451035c85
children c844f8bb87ce
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daa03aa2262d sys/glib: general cleanup, use C++ principles, add more suffixes
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1 #include "sys/glib/dark_theme.h"
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2
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3 #include <cstring>
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4 #include <gio/gio.h>
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5 #include <string_view>
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6 #include <memory>
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7 #include <array>
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8
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9 namespace glib {
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10
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11 /* deleters */
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12 template<typename T>
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13 struct g_object_del {
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14 void operator()(T* p) const { ::g_object_unref(p); };
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15 };
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17 template<typename T>
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18 struct g_variant_del {
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19 void operator()(T* p) const { ::g_variant_unref(p); };
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20 };
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22 template<typename T>
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23 struct g_malloc_del {
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24 void operator()(T* p) const { ::g_free(p); };
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25 };
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27 template<typename T>
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28 using GObjectPtr = std::unique_ptr<T, g_object_del<T>>;
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30 template<typename T>
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31 using GVariantPtr = std::unique_ptr<T, g_variant_del<T>>;
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33 template<typename T>
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34 using GMallocPtr = std::unique_ptr<T, g_malloc_del<T>>;
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35
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36 bool IsInDarkTheme() {
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37 GObjectPtr<GSettings> settings(::g_settings_new("org.gnome.desktop.interface"));
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38 if (!settings)
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39 return false;
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41 {
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42 /* first attempt to get the colorscheme */
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43 GVariantPtr<GVariant> val(::g_settings_get_value(settings.get(), "color-scheme"));
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44 if (!val)
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45 return false;
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46
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47 /* this is free'd upon deconstruction of the GVariantPtr */
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48 gsize size;
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49 const gchar* str = ::g_variant_get_string(val.get(), &size);
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50 if (!str)
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51 return false;
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52
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53 bool success = !std::strncmp(str, size, "prefer-dark");
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54
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55 if (success)
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56 return true;
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57 }
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59 {
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60 /* if that doesn't exist, use the GTK theme and check for some known
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61 * suffixes. if one is found, return
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62 *
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63 * XXX probably better to use case folding here */
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64 static constexpr std::array<std::string_view, 3> suffixes = {
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65 "-dark", /* Adwaita-dark */
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66 "-Dark", /* Arc-Dark */
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67 "-Darker", /* Arc-Darker */
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68 };
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70 GVariantPtr<GVariant> gtk_theme(::g_settings_get_value(settings.get(), "gtk-theme"));
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71 if (!gtk_theme)
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72 return false;
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73
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74 gsize size;
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75 const gchar* str = ::g_variant_get_string(gtk_theme.get(), &size);
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76 if (!str)
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77 return false;
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78
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79 for (const auto& suffix : suffixes) {
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80 if (size < suffix.size())
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81 continue;
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83 if (std::equal(str + size - suffix.length(), str + size, suffix.begin(), suffix.end()))
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84 return true;
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85 }
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86 }
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87
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88 /* welp, we tried */
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89 return false;
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90 }
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92 } // namespace glib