system.go RawHistoryFolder

1package theme
2
3import (
4	"os"
5	"os/exec"
6	"strings"
7
8	"github.com/jwijenbergh/puregotk/v4/gtk"
9)
10
11// DetectSystemDarkMode checks if the system prefers dark mode.
12// It checks multiple sources in order of preference:
13// 1. GTK_THEME environment variable (contains "dark")
14// 2. GNOME gsettings color-scheme (prefer-dark/prefer-light)
15// 3. GTK Settings gtk-application-prefer-dark-theme property
16// Returns true if dark mode is preferred.
17func DetectSystemDarkMode() bool {
18	// Check GTK_THEME environment variable first
19	gtkTheme := os.Getenv("GTK_THEME")
20	if gtkTheme != "" {
21		if strings.Contains(strings.ToLower(gtkTheme), "dark") {
22			return true
23		}
24		// If GTK_THEME is set but doesn't contain "dark", it's likely light
25		return false
26	}
27
28	// Check GNOME gsettings color-scheme (modern GNOME/GTK4 method)
29	if colorScheme := getGsettingsColorScheme(); colorScheme != "" {
30		switch colorScheme {
31		case "prefer-dark":
32			return true
33		case "prefer-light":
34			return false
35			// "default" falls through to next check
36		}
37	}
38
39	// Try GTK Settings
40	settings := gtk.SettingsGetDefault()
41	if settings != nil {
42		// gtk-application-prefer-dark-theme is a boolean property
43		preferDark := settings.GetPropertyGtkApplicationPreferDarkTheme()
44		return preferDark
45	}
46
47	// Default to dark mode if detection fails (better for eyes)
48	return true
49}
50
51// getGsettingsColorScheme queries GNOME gsettings for the color-scheme preference.
52// Returns "prefer-dark", "prefer-light", "default", or empty string on error.
53func getGsettingsColorScheme() string {
54	cmd := exec.Command("gsettings", "get", "org.gnome.desktop.interface", "color-scheme")
55	output, err := cmd.Output()
56	if err != nil {
57		return ""
58	}
59	// Output is like "'prefer-dark'\n", strip quotes and whitespace
60	result := strings.TrimSpace(string(output))
61	result = strings.Trim(result, "'\"")
62	return result
63}
64
65// ResolveColorScheme determines the effective dark mode preference.
66// It takes the config value ("prefer-dark", "prefer-light", "default")
67// and resolves "default" to the system preference.
68func ResolveColorScheme(configScheme string) bool {
69	switch strings.ToLower(configScheme) {
70	case "prefer-dark", "dark":
71		return true
72	case "prefer-light", "light":
73		return false
74	default:
75		// "default" or empty - follow system
76		return DetectSystemDarkMode()
77	}
78}