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
|
import type { Ast, TemplateNode } from '../compiler/interfaces';
import { NodeVisitor, Optimizer, VisitorFn } from './types';
import { walk } from 'estree-walker';
import optimizeStyles from './styles.js';
interface VisitorCollection {
enter: Map<string, VisitorFn[]>;
leave: Map<string, VisitorFn[]>;
}
function addVisitor(visitor: NodeVisitor, collection: VisitorCollection, nodeName: string, event: 'enter' | 'leave') {
if(event in visitor) {
if(collection[event].has(nodeName)) {
collection[event].get(nodeName)!.push(visitor[event]!);
}
collection.enter.set(nodeName, [visitor[event]!]);
}
}
function collectVisitors(optimizer: Optimizer, htmlVisitors: VisitorCollection, cssVisitors: VisitorCollection, finalizers: Array<() => Promise<void>>) {
if(optimizer.visitors) {
if(optimizer.visitors.html) {
for(const [nodeName, visitor] of Object.entries(optimizer.visitors.html)) {
addVisitor(visitor, htmlVisitors, nodeName, 'enter');
addVisitor(visitor, htmlVisitors, nodeName, 'leave');
}
}
if(optimizer.visitors.css) {
for(const [nodeName, visitor] of Object.entries(optimizer.visitors.css)) {
addVisitor(visitor, cssVisitors, nodeName, 'enter');
addVisitor(visitor, cssVisitors, nodeName, 'leave');
}
}
}
finalizers.push(optimizer.finalize);
}
function createVisitorCollection() {
return {
enter: new Map<string, VisitorFn[]>(),
leave: new Map<string, VisitorFn[]>(),
};
}
function walkAstWithVisitors(tmpl: TemplateNode, collection: VisitorCollection) {
walk(tmpl, {
enter(node) {
if(collection.enter.has(node.type)) {
const fns = collection.enter.get(node.type)!;
for(let fn of fns) {
fn(node);
}
}
},
leave(node) {
if(collection.leave.has(node.type)) {
const fns = collection.leave.get(node.type)!;
for(let fn of fns) {
fn(node);
}
}
}
});
}
interface OptimizeOptions {
filename: string,
fileID: string
}
export async function optimize(ast: Ast, opts: OptimizeOptions) {
const htmlVisitors = createVisitorCollection();
const cssVisitors = createVisitorCollection();
const finalizers: Array<() => Promise<void>> = [];
collectVisitors(optimizeStyles(opts), htmlVisitors, cssVisitors, finalizers);
walkAstWithVisitors(ast.html, htmlVisitors);
walkAstWithVisitors(ast.css, cssVisitors);
// Run all of the finalizer functions in parallel because why not.
await Promise.all(finalizers.map(fn => fn()));
}
|
