taino-edit-core 0.5.3

Framework-agnostic document model, transforms, state, history and commands for the taino-edit WYSIWYG editor.
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

//! Phase 2: the tree-replace algorithm — insert, delete, block joins,
//! nested descent, the cut↔replace identity, and schema/​depth rejection.

use taino_edit_core::{Fragment, Node, NodeSpec, ReplaceError, Schema, SchemaBuilder, Slice};

fn schema() -> Schema {
    SchemaBuilder::new()
        .node(
            "doc",
            NodeSpec {
                content: Some("block+".into()),
                ..Default::default()
            },
        )
        .node(
            "blockquote",
            NodeSpec {
                content: Some("block+".into()),
                group: Some("block".into()),
                ..Default::default()
            },
        )
        .node(
            "paragraph",
            NodeSpec {
                content: Some("inline*".into()),
                group: Some("block".into()),
                ..Default::default()
            },
        )
        .node(
            "text",
            NodeSpec {
                group: Some("inline".into()),
                ..Default::default()
            },
        )
        .top_node("doc")
        .build()
        .unwrap()
}

fn para(s: &Schema, t: &str) -> Node {
    let txt = s.text(t, vec![]).unwrap();
    s.node("paragraph", Default::default(), vec![txt], vec![])
        .unwrap()
}

fn doc(s: &Schema, ps: Vec<Node>) -> Node {
    s.node("doc", Default::default(), ps, vec![]).unwrap()
}

fn text_slice(s: &Schema, t: &str) -> Slice {
    Slice::new(Fragment::from_node(s.text(t, vec![]).unwrap()), 0, 0)
}

#[test]
fn inserts_text_into_a_paragraph() {
    let s = schema();
    let d = doc(&s, vec![para(&s, "Hello")]);
    // p occupies 0..7; "Hello" content is 1..6, so pos 6 is end-of-text.
    let out = d.replace(6, 6, &text_slice(&s, " world"), &s).unwrap();
    assert_eq!(out, doc(&s, vec![para(&s, "Hello world")]));
}

#[test]
fn deletes_a_range() {
    let s = schema();
    let d = doc(&s, vec![para(&s, "Hello world")]);
    let out = d.replace(6, 12, &Slice::empty(), &s).unwrap();
    assert_eq!(out, doc(&s, vec![para(&s, "Hello")]));
}

#[test]
fn joins_two_paragraphs() {
    let s = schema();
    let d = doc(&s, vec![para(&s, "foo"), para(&s, "bar")]);
    // End of the first paragraph's text (4) to start of the second's (6).
    let out = d.replace(4, 6, &Slice::empty(), &s).unwrap();
    assert_eq!(out, doc(&s, vec![para(&s, "foobar")]));
}

#[test]
fn descends_into_nested_blocks() {
    let s = schema();
    let inner = s
        .node(
            "blockquote",
            Default::default(),
            vec![para(&s, "a"), para(&s, "b")],
            vec![],
        )
        .unwrap();
    let d = doc(&s, vec![inner]);
    // "a" sits at absolute 2..3; insert at 3 (end of "a").
    let out = d.replace(3, 3, &text_slice(&s, "X"), &s).unwrap();

    let expected_inner = s
        .node(
            "blockquote",
            Default::default(),
            vec![para(&s, "aX"), para(&s, "b")],
            vec![],
        )
        .unwrap();
    assert_eq!(out, doc(&s, vec![expected_inner]));
}

#[test]
fn cut_then_reinsert_is_identity() {
    let s = schema();
    let d = doc(&s, vec![para(&s, "Hello"), para(&s, "World")]);
    // Replacing any range with exactly its own slice must be a no-op.
    for (from, to) in [(1, 1), (2, 5), (3, 9), (1, 13), (0, d.content().size())] {
        let sl = d.slice(from, to).unwrap();
        let out = d.replace(from, to, &sl, &s).unwrap();
        assert_eq!(out, d, "replace({from},{to}, own slice) must be identity");
    }
}

#[test]
fn slice_records_open_depths() {
    let s = schema();
    let d = doc(&s, vec![para(&s, "Hello"), para(&s, "World")]);
    // From inside the first paragraph to inside the second.
    let sl = d.slice(3, 11).unwrap();
    assert_eq!(sl.open_start(), 1);
    assert_eq!(sl.open_end(), 1);
    assert_eq!(sl.content().child_count(), 2);
}

#[test]
fn rejects_schema_violating_replacement() {
    let s = schema();
    let d = doc(&s, vec![para(&s, "Hello")]);
    // A block paragraph spliced into inline text violates `inline*`.
    let block_slice = Slice::new(Fragment::from_node(para(&s, "x")), 0, 0);
    assert!(matches!(
        d.replace(3, 3, &block_slice, &s),
        Err(ReplaceError::InvalidContent { .. })
    ));
}

#[test]
fn rejects_inconsistent_open_depth() {
    let s = schema();
    let d = doc(&s, vec![para(&s, "Hello")]);
    let too_open = Slice::new(Fragment::from_node(s.text("x", vec![]).unwrap()), 5, 5);
    assert!(matches!(
        d.replace(3, 3, &too_open, &s),
        Err(ReplaceError::OpenTooDeep)
    ));
}