rdom-tui 0.3.4

Terminal rendering layer for rdom-core — flexbox layout, TUI styles, key/mouse events. Use rdom-core directly for headless DOM manipulation.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241

//! Clipboard unit tests — selection serialization + the memory
//! backend. App-level copy/cut/paste flow is covered in
//! `runtime/app/tests.rs` since it drives the event loop.

use rdom_core::{Position, Range, Selection};

use crate::TuiDom;
use crate::layout::{Display, Size, UserSelect};
use crate::render::{LayoutExt, Rect};
use crate::runtime::selection::clipboard::{Clipboard, MemoryClipboard, serialize_selection};
use crate::style::{CascadeExt, Stylesheet, TuiStyle};

fn prepare(dom: &mut TuiDom, sheet: &Stylesheet) {
    dom.cascade(sheet);
    dom.layout_dom(Rect::new(0, 0, 40, 10));
}

// ── MemoryClipboard ─────────────────────────────────────────────────

#[test]
fn memory_clipboard_roundtrip() {
    let mut cb = MemoryClipboard::new();
    assert_eq!(cb.read_text(), None);
    cb.write_text("hello".to_string());
    assert_eq!(cb.read_text().as_deref(), Some("hello"));
}

#[test]
fn memory_clipboard_with_text_seeds() {
    let mut cb = MemoryClipboard::with_text("seeded");
    assert_eq!(cb.read_text().as_deref(), Some("seeded"));
}

#[test]
fn memory_clipboard_overwrites() {
    let mut cb = MemoryClipboard::with_text("old");
    cb.write_text("new".to_string());
    assert_eq!(cb.peek(), Some("new"));
}

// ── serialize_selection ─────────────────────────────────────────────

#[test]
fn serialize_single_node_range_returns_sliced_text() {
    let mut dom: TuiDom = TuiDom::new();
    let root = dom.root();
    let p = dom.create_element("p");
    let t = dom.create_text_node("hello world");
    dom.append_child(p, t).unwrap();
    dom.append_child(root, p).unwrap();
    prepare(&mut dom, &Stylesheet::bare());

    let range = Range::ordered_unchecked(Position::new(t, 6), Position::new(t, 11));
    assert_eq!(serialize_selection(&dom, &range), "world");
}

#[test]
fn serialize_cross_node_range_concats_text_in_doc_order() {
    // <p>ab<code>XY</code>cd</p>, selection 1..1 across text nodes
    // yields "b" + "XY" + "c" = "bXYc".
    let mut dom: TuiDom = TuiDom::new();
    let root = dom.root();
    let p = dom.create_element("p");
    let t_ab = dom.create_text_node("ab");
    dom.append_child(p, t_ab).unwrap();
    let code = dom.create_element("code");
    let t_xy = dom.create_text_node("XY");
    dom.append_child(code, t_xy).unwrap();
    dom.append_child(p, code).unwrap();
    let t_cd = dom.create_text_node("cd");
    dom.append_child(p, t_cd).unwrap();
    dom.append_child(root, p).unwrap();
    prepare(&mut dom, &Stylesheet::bare());

    let range = Range::ordered_unchecked(Position::new(t_ab, 1), Position::new(t_cd, 1));
    assert_eq!(serialize_selection(&dom, &range), "bXYc");
}

#[test]
fn serialize_skips_user_select_none_subtree() {
    // <p>ab<span class=chrome>HIDDEN</span>cd</p>, selection covers
    // everything. The chrome span should NOT leak into the clipboard.
    let mut dom: TuiDom = TuiDom::new();
    let root = dom.root();
    let p = dom.create_element("p");
    let t_ab = dom.create_text_node("ab");
    dom.append_child(p, t_ab).unwrap();
    let chrome = dom.create_element("span");
    dom.add_class(chrome, "chrome").unwrap();
    let t_hidden = dom.create_text_node("HIDDEN");
    dom.append_child(chrome, t_hidden).unwrap();
    dom.append_child(p, chrome).unwrap();
    let t_cd = dom.create_text_node("cd");
    dom.append_child(p, t_cd).unwrap();
    dom.append_child(root, p).unwrap();

    let sheet = Stylesheet::bare()
        .rule_unchecked(
            "p",
            TuiStyle::new()
                .display(Display::Block)
                .width(Size::Fixed(40)),
        )
        .rule_unchecked(".chrome", TuiStyle::new().user_select(UserSelect::None));
    prepare(&mut dom, &sheet);

    let range = Range::ordered_unchecked(Position::new(t_ab, 0), Position::new(t_cd, 2));
    assert_eq!(serialize_selection(&dom, &range), "abcd");
}

#[test]
fn serialize_cjk_preserves_bytes() {
    // Byte offsets into a CJK string should pull out the exact bytes,
    // which decode back to valid UTF-8 because the offsets land on
    // grapheme boundaries.
    let mut dom: TuiDom = TuiDom::new();
    let root = dom.root();
    let p = dom.create_element("p");
    let t = dom.create_text_node("中文");
    dom.append_child(p, t).unwrap();
    dom.append_child(root, p).unwrap();
    prepare(&mut dom, &Stylesheet::bare());

    let range = Range::ordered_unchecked(Position::new(t, 0), Position::new(t, 3));
    assert_eq!(serialize_selection(&dom, &range), "中");
}

#[test]
fn serialize_respects_dom_set_selection_via_selection_range() {
    // Integration check: Dom::set_selection + Dom::selection_range
    // produces a range compatible with serialize_selection.
    let mut dom: TuiDom = TuiDom::new();
    let root = dom.root();
    let p = dom.create_element("p");
    let t = dom.create_text_node("hello world");
    dom.append_child(p, t).unwrap();
    dom.append_child(root, p).unwrap();
    prepare(&mut dom, &Stylesheet::bare());

    dom.set_selection(Some(Selection::new(
        Position::new(t, 6),
        Position::new(t, 11),
    )));

    let range = dom.selection_range().expect("selection is set");
    assert_eq!(serialize_selection(&dom, &range), "world");
}

// ── Polish #7: OSC 52 clipboard ──────────────────────────────────

use crate::runtime::selection::clipboard::OscClipboard;
use std::sync::{Arc, Mutex};

/// `Arc<Mutex<Vec<u8>>>`-backed writer used by OSC clipboard tests.
/// Implements `Write` by appending to the shared buffer so
/// assertions can inspect exactly what bytes were emitted.
#[derive(Clone, Default)]
struct ByteSink(Arc<Mutex<Vec<u8>>>);

impl std::io::Write for ByteSink {
    fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
        self.0.lock().unwrap().extend_from_slice(buf);
        Ok(buf.len())
    }
    fn flush(&mut self) -> std::io::Result<()> {
        Ok(())
    }
}

impl ByteSink {
    fn snapshot(&self) -> Vec<u8> {
        self.0.lock().unwrap().clone()
    }
}

#[test]
fn osc52_write_emits_base64_in_osc_sequence() {
    let sink = ByteSink::default();
    let snapshot = sink.clone();
    let mut cb = OscClipboard::with_writer(sink);
    cb.write_text("hello".into());
    let out = String::from_utf8(snapshot.snapshot()).unwrap();
    // ESC ] 5 2 ; c ; <base64> ESC \
    assert_eq!(out, "\x1b]52;c;aGVsbG8=\x1b\\");
}

#[test]
fn osc52_write_handles_three_byte_aligned_input_without_padding() {
    let sink = ByteSink::default();
    let snapshot = sink.clone();
    let mut cb = OscClipboard::with_writer(sink);
    cb.write_text("foo".into()); // 3 bytes → 4 base64 chars, no `=`.
    let out = String::from_utf8(snapshot.snapshot()).unwrap();
    assert_eq!(out, "\x1b]52;c;Zm9v\x1b\\");
}

#[test]
fn osc52_write_handles_two_byte_remainder_with_single_pad() {
    let sink = ByteSink::default();
    let snapshot = sink.clone();
    let mut cb = OscClipboard::with_writer(sink);
    cb.write_text("hi".into()); // 2 bytes → 4 chars with one `=`.
    let out = String::from_utf8(snapshot.snapshot()).unwrap();
    assert_eq!(out, "\x1b]52;c;aGk=\x1b\\");
}

#[test]
fn osc52_write_handles_empty_string() {
    let sink = ByteSink::default();
    let snapshot = sink.clone();
    let mut cb = OscClipboard::with_writer(sink);
    cb.write_text(String::new());
    let out = String::from_utf8(snapshot.snapshot()).unwrap();
    // Empty base64 → empty payload between `;c;` and terminator.
    assert_eq!(out, "\x1b]52;c;\x1b\\");
}

#[test]
fn osc52_write_roundtrips_unicode_via_base64() {
    let sink = ByteSink::default();
    let snapshot = sink.clone();
    let mut cb = OscClipboard::with_writer(sink);
    cb.write_text("héllo — 中".into());
    let out = String::from_utf8(snapshot.snapshot()).unwrap();
    assert!(out.starts_with("\x1b]52;c;"));
    assert!(out.ends_with("\x1b\\"));
    let payload = &out["\x1b]52;c;".len()..out.len() - "\x1b\\".len()];
    // Base64 of UTF-8 "héllo — 中":
    // h(68) é(C3 A9) l(6C) l(6C) o(6F) ' '(20) —(E2 80 94) ' '(20) 中(E4 B8 AD)
    // = 14 bytes → 20 base64 chars (including one `=` pad).
    assert_eq!(payload, "aMOpbGxvIOKAlCDkuK0=");
}

#[test]
fn osc52_read_returns_none_in_v1() {
    // Read is unsupported without an incoming terminal response
    // parser. Any future polish pass can flip this — for now it's
    // documented as write-only.
    let mut cb = OscClipboard::with_writer(ByteSink::default());
    assert!(cb.read_text().is_none());
}