detector_adwaita.go RawHistoryFolder

1package colorscheme
2
3import (
4	"sync/atomic"
5
6	"github.com/bnema/puregotk/v4/adw"
7)
8
9const (
10	detectorNameAdwaita = "libadwaita"
11	priorityAdwaita     = 100
12)
13
14// AdwaitaDetector detects color scheme from libadwaita's StyleManager.
15// This is the most accurate detector after adw.Init() has been called,
16// as it reflects the same state that WebKit uses for prefers-color-scheme.
17type AdwaitaDetector struct {
18	available atomic.Bool
19}
20
21// NewAdwaitaDetector creates a new libadwaita-based detector.
22// Initially unavailable until MarkAvailable() is called after adw.Init().
23func NewAdwaitaDetector() *AdwaitaDetector {
24	return &AdwaitaDetector{}
25}
26
27// Name implements port.ColorSchemeDetector.
28func (*AdwaitaDetector) Name() string {
29	return detectorNameAdwaita
30}
31
32// Priority implements port.ColorSchemeDetector.
33func (*AdwaitaDetector) Priority() int {
34	return priorityAdwaita
35}
36
37// Available implements port.ColorSchemeDetector.
38// Returns true only after MarkAvailable() has been called.
39func (d *AdwaitaDetector) Available() bool {
40	return d.available.Load()
41}
42
43// MarkAvailable should be called after adw.Init() completes.
44// This enables the detector to query StyleManager.
45func (d *AdwaitaDetector) MarkAvailable() {
46	d.available.Store(true)
47}
48
49// Detect implements port.ColorSchemeDetector.
50// Queries libadwaita's StyleManager for the dark mode preference.
51func (d *AdwaitaDetector) Detect() (prefersDark, ok bool) {
52	if !d.Available() {
53		return false, false
54	}
55
56	styleMgr := adw.StyleManagerGetDefault()
57	if styleMgr == nil {
58		return false, false
59	}
60
61	return styleMgr.GetDark(), true
62}