-
-
Notifications
You must be signed in to change notification settings - Fork 4.1k
/
index.ts
179 lines (137 loc) · 4.74 KB
/
index.ts
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
import { b } from 'code-red';
import Component from '../Component';
import { CompileOptions, CssResult } from '../../interfaces';
import { string_literal } from '../utils/stringify';
import Renderer from './Renderer';
import { INode as TemplateNode } from '../nodes/interfaces'; // TODO
import Text from '../nodes/Text';
import { LabeledStatement, Statement, Node } from 'estree';
export default function ssr(
component: Component,
options: CompileOptions
): {js: Node[]; css: CssResult} {
const renderer = new Renderer({
name: component.name
});
const { name } = component;
// create $$render function
renderer.render(trim(component.fragment.children), Object.assign({
locate: component.locate
}, options));
// TODO put this inside the Renderer class
const literal = renderer.pop();
// TODO concatenate CSS maps
const css = options.customElement ?
{ code: null, map: null } :
component.stylesheet.render(options.filename, true);
const uses_rest = component.var_lookup.has('$$restProps');
const props = component.vars.filter(variable => !variable.module && variable.export_name);
const rest = uses_rest ? b`let $$restProps = @compute_rest_props($$props, [${props.map(prop => `"${prop.export_name}"`).join(',')}]);` : null;
const uses_slots = component.var_lookup.has('$$slots');
const slots = uses_slots ? b`let $$slots = @compute_slots(#slots);` : null;
const reactive_stores = component.vars.filter(variable => variable.name[0] === '$' && variable.name[1] !== '$');
const reactive_store_values = reactive_stores
.map(({ name }) => {
const store_name = name.slice(1);
const store = component.var_lookup.get(store_name);
if (store && store.hoistable) return null;
const assignment = b`${name} = @get_store_value(${store_name});`;
return component.compile_options.dev
? b`@validate_store(${store_name}, '${store_name}'); ${assignment}`
: assignment;
})
.filter(Boolean);
component.rewrite_props(({ name }) => {
const value = `$${name}`;
let insert = b`${value} = @get_store_value(${name})`;
if (component.compile_options.dev) {
insert = b`@validate_store(${name}, '${name}'); ${insert}`;
}
return insert;
});
const instance_javascript = component.extract_javascript(component.ast.instance);
// TODO only do this for props with a default value
const parent_bindings = instance_javascript
? component.vars
.filter(variable => !variable.module && variable.export_name)
.map(prop => {
return b`if ($$props.${prop.export_name} === void 0 && $$bindings.${prop.export_name} && ${prop.name} !== void 0) $$bindings.${prop.export_name}(${prop.name});`;
})
: [];
const injected = Array.from(component.injected_reactive_declaration_vars).filter(name => {
const variable = component.var_lookup.get(name);
return variable.injected;
});
const reactive_declarations = component.reactive_declarations.map(d => {
const body: Statement = (d.node as LabeledStatement).body;
let statement = b`${body}`;
if (!d.declaration) { // TODO do not add label if it's not referenced
statement = b`$: { ${statement} }`;
}
return statement;
});
const main = renderer.has_bindings
? b`
let $$settled;
let $$rendered;
do {
$$settled = true;
${reactive_store_values}
${injected.map(name => b`let ${name};`)}
${reactive_declarations}
$$rendered = ${literal};
} while (!$$settled);
return $$rendered;
`
: b`
${reactive_store_values}
${injected.map(name => b`let ${name};`)}
${reactive_declarations}
return ${literal};`;
const blocks = [
rest,
slots,
...reactive_stores.map(({ name }) => {
const store_name = name.slice(1);
const store = component.var_lookup.get(store_name);
if (store && store.hoistable) {
return b`let ${name} = @get_store_value(${store_name});`;
}
return b`let ${name};`;
}),
instance_javascript,
...parent_bindings,
css.code && b`$$result.css.add(#css);`,
main
].filter(Boolean);
const js = b`
${css.code ? b`
const #css = {
code: "${css.code}",
map: ${css.map ? string_literal(css.map.toString()) : 'null'}
};` : null}
${component.extract_javascript(component.ast.module)}
${component.fully_hoisted}
const ${name} = @create_ssr_component(($$result, $$props, $$bindings, #slots) => {
${blocks}
});
`;
return {js, css};
}
function trim(nodes: TemplateNode[]) {
let start = 0;
for (; start < nodes.length; start += 1) {
const node = nodes[start] as Text;
if (node.type !== 'Text') break;
node.data = node.data.replace(/^\s+/, '');
if (node.data) break;
}
let end = nodes.length;
for (; end > start; end -= 1) {
const node = nodes[end - 1] as Text;
if (node.type !== 'Text') break;
node.data = node.data.replace(/\s+$/, '');
if (node.data) break;
}
return nodes.slice(start, end);
}