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
|
import {SynNode} from "cstea";
import {EditorState, EditorView, basicSetup} from "@codemirror/basic-setup"
import {Decoration, DecorationSet} from "@codemirror/view"
import {StateField, StateEffect} from "@codemirror/state"
import {rust} from "@codemirror/lang-rust"
import {oneDark, oneDarkTheme, oneDarkHighlightStyle} from "@codemirror/theme-one-dark"
import file from '!raw-loader!../src/lib.rs'
let cst = document.getElementById('cst');
let view = new EditorView({
state: EditorState.create({
doc: file,
extensions: [
basicSetup,
rust(),
EditorView.updateListener.of((v) => {
if (v.docChanged) {
doRender()
}
}),
oneDark,
oneDarkTheme,
oneDarkHighlightStyle.extension
]
}),
parent: document.getElementById('source-code'),
})
const doHighlight = StateEffect.define()
const highlightField = StateField.define({
create() {
return Decoration.none;
},
update(highlight, tr) {
for (let e of tr.effects) if (e.is(doHighlight)) {
return (Decoration.none).update({
add: [hlMark.range(e.value.from, e.value.to)]
});
}
return Decoration.none;
},
provide: f => EditorView.decorations.from(f)
})
const hlMark = Decoration.mark({class: "cm-highlight"})
const hlTheme = EditorView.baseTheme({
".cm-highlight": {
backgroundColor: "#ff3299aa"
}
})
function highlightArea(view, textRange) {
let effects = [doHighlight.of({from: textRange.start(), to: textRange.end()})];
if (!view.state.field(highlightField, false)) {
effects.push(StateEffect.appendConfig.of([highlightField, hlTheme]));
}
view.dispatch({effects});
}
function render_cst(synRoot) {
let nodeDiv = document.createElement("div");
nodeDiv.className = "syntax-node";
let r = synRoot.range();
let synText = synTextHtml(synRoot);
synText.onmouseover = () => {
highlightArea(view, r);
let sourceFile = view.state.doc.toString();
view.scrollPosIntoView(r.start());
}
nodeDiv.appendChild(synText);
if (!synRoot.is_token()) {
synRoot.children().forEach(node => {
nodeDiv.appendChild(render_cst(node));
});
}
return nodeDiv;
}
function synTextHtml(node) {
let kind = document.createElement("span");
kind.innerText = ` ${node.kind()} `
kind.className = "kind";
let text = document.createElement("span");
text.innerText = ` ${node.text()} `
text.className = "token-text";
let range = document.createElement("span");
range.innerText = ` ${node.range().to_string()} `
range.className = "range";
let d = document.createElement("div");
d.appendChild(kind);
d.appendChild(text);
d.appendChild(range);
return d;
}
function wrap(s, tag) {
let t = document.createElement(tag);
t.innerText = s;
return t;
}
function render_err(errorList) {
let errDiv = document.createElement("div");
errDiv.className = "syntax-err";
errorList.forEach(err => {
let sourceFile = view.state.doc.toString();
let line = err.range().line(sourceFile);
let col = err.range().col(sourceFile);
errDiv.appendChild(wrap(`line ${line}, col ${col}: ` + err.to_string(), "pre"));
// highlightArea(view, err.range());
});
return errDiv;
}
function doRender() {
let sourceFile = view.state.doc.toString();
cst.innerHTML = "";
try {
let synRoot = SynNode.from_str(sourceFile);
cst.appendChild(render_cst(synRoot));
} catch (synError) {
cst.appendChild(render_err(synError));
}
}
doRender();
|
