controls_label_test.go RawHistoryFolder

1package ui
2
3import (
4	"testing"
5
6	"github.com/bnema/nefergui/internal/css"
7	"github.com/bnema/nefergui/internal/layout"
8	"github.com/bnema/nefergui/internal/text"
9)
10
11// Every visible string a view declares must reach the display list as shaped
12// glyphs. Snapshots alone once froze labelless controls; this invariant does not
13// depend on a golden file.
14func TestDeclaredTextIsPainted(t *testing.T) {
15	catalog, err := text.Load(text.DirectorySource("../../testdata/fonts"))
16	if err != nil {
17		t.Fatal(err)
18	}
19	r := newRuntime()
20	r.setTextEngine(text.NewEngine(catalog))
21	r.styles = css.Compile(css.UA(), css.Parse(`input,textarea{width:200px;height:40px}`))
22	checked, choice, v := false, "", 3.0
23	name, notes, filled := "", "", "set"
24	view := func(f *Frame) {
25		root := f.Root()
26		root.Button("Continuer", Key("button"))
27		root.Checkbox("Thème sombre", &checked, Key("checkbox"))
28		root.Radio("Option", "a", &choice, Key("radio"))
29		root.Slider("Volume", &v, 0, 10, 1, Key("slider"))
30		root.Input("Nom", &name, Key("input"), Placeholder("Ada"))
31		root.Textarea("Notes", &notes, Key("textarea"), Placeholder("Écrire…"))
32		root.Input("Rempli", &filled, Key("filled"), Placeholder("hidden"))
33		root.Button("Off", Key("disabled"), Disabled(true))
34	}
35	r.Build(view)
36	painted := map[string]layout.Command{}
37	for _, cmd := range r.output.Display {
38		if cmd.Op == "text" && glyphCount(cmd) > 0 {
39			painted[cmd.Text] = cmd
40		}
41	}
42	for _, want := range []string{"Continuer", "Thème sombre", "Option", "Volume", "Ada", "Écrire…", "set", "Off"} {
43		if _, ok := painted[want]; !ok {
44			t.Errorf("%q declared but not painted; painted: %v", want, keys(painted))
45		}
46	}
47	if _, ok := painted["hidden"]; ok {
48		t.Error("placeholder painted over a non-empty value")
49	}
50	if p := painted["Ada"]; p.Opacity >= 1 || p.Opacity <= 0 {
51		t.Errorf("placeholder opacity %v, want dimmed", p.Opacity)
52	}
53	// The placeholder never enters the model, and typing replaces it.
54	if name != "" {
55		t.Fatalf("placeholder leaked into value: %q", name)
56	}
57	r.route(key("Tab"))
58	r.Build(view)
59	for i := 0; i < 4; i++ {
60		r.route(key("Tab"))
61		r.Build(view)
62	}
63	r.route(typed("b", "b"))
64	r.Build(view)
65	for _, cmd := range r.output.Display {
66		if cmd.Text == "Ada" {
67			t.Fatalf("placeholder still painted after typing %q", name)
68		}
69	}
70	if name != "b" {
71		t.Fatalf("typed into wrong control: name=%q", name)
72	}
73}
74
75// Placeholders follow editor text geometry: text-align and RTL position,
76// letter-spacing, and textarea wrapping.
77func TestPlaceholderGeometry(t *testing.T) {
78	catalog, err := text.Load(text.DirectorySource("../../testdata/fonts"))
79	if err != nil {
80		t.Fatal(err)
81	}
82	placeholder := func(sheet, typ, p string) layout.Command {
83		t.Helper()
84		r := newRuntime()
85		r.setTextEngine(text.NewEngine(catalog))
86		r.styles = css.Compile(css.UA(), css.Parse(sheet))
87		value := ""
88		r.Build(func(f *Frame) {
89			if typ == "textarea" {
90				f.Root().Textarea("", &value, Placeholder(p))
91			} else {
92				f.Root().Input("", &value, Placeholder(p))
93			}
94		})
95		for _, cmd := range r.output.Display {
96			if cmd.Text == p {
97				return cmd
98			}
99		}
100		t.Fatalf("placeholder %q not painted", p)
101		return layout.Command{}
102	}
103	span := func(cmd layout.Command) (lo, hi float64, lines int) {
104		lo, hi = 1e9, -1e9
105		ys := map[float64]bool{}
106		for _, run := range cmd.Runs {
107			ys[run.Y] = true
108			for _, g := range run.Glyphs {
109				lo, hi = min(lo, g.X), max(hi, g.X+g.Advance)
110			}
111		}
112		return lo, hi, len(ys)
113	}
114	box := `input,textarea{width:300px;height:80px;font-size:16px}`
115	leftLo, leftHi, _ := span(placeholder(box, "input", "Ada"))
116	if leftLo > 1 {
117		t.Errorf("start-aligned LTR placeholder at x=%v", leftLo)
118	}
119	if lo, hi, _ := span(placeholder(box+`input{text-align:right}`, "input", "Ada")); hi < 299 || lo < 200 {
120		t.Errorf("right-aligned placeholder spans %v..%v", lo, hi)
121	}
122	if lo, hi, _ := span(placeholder(box, "input", "مرحبا")); hi < 299 || lo < 200 {
123		t.Errorf("RTL start-aligned placeholder spans %v..%v", lo, hi)
124	}
125	if lo, hi, _ := span(placeholder(box+`input{letter-spacing:4px}`, "input", "Ada")); hi-lo < leftHi-leftLo+8 {
126		t.Errorf("letter-spacing ignored: width %v vs %v", hi-lo, leftHi-leftLo)
127	}
128	long := "Une longue phrase d'exemple qui dépasse la largeur du champ de texte"
129	if _, hi, lines := span(placeholder(box, "textarea", long)); lines < 2 || hi > 300.5 {
130		t.Errorf("textarea placeholder: %d lines, right edge %v", lines, hi)
131	}
132}
133
134func glyphCount(cmd layout.Command) int {
135	n := 0
136	for _, run := range cmd.Runs {
137		n += len(run.Glyphs)
138	}
139	return n
140}
141
142func keys(m map[string]layout.Command) []string {
143	out := make([]string, 0, len(m))
144	for k := range m {
145		out = append(out, k)
146	}
147	return out
148}