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Refactor to move implementation to lib/ 
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‎index.js

Lines changed: 1 addition & 105 deletions
Original file line numberDiff line numberDiff line change
@@ -1,109 +1,5 @@
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/**
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* @typedef {import('./lib/types.js').Element} Element
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* @typedef {import('./lib/types.js').Node} Node
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* @typedef {import('./lib/types.js').Space} Space
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* @typedef {import('./lib/types.js').SelectState} SelectState
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*/
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import {html, svg} from 'property-information'
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import {queryToSelectors, walk} from './lib/walk.js'
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import {parse} from './lib/parse.js'
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/**
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* Check that the given `node` matches `selector`.
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*
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* This only checks the element itself, not the surrounding tree.
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* Thus, nesting in selectors is not supported (`p b`, `p > b`), neither are
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* selectors like `:first-child`, etc.
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* This only checks that the given element matches the selector.
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*
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* @param {string} selector
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* CSS selector, such as (`h1`, `a, b`).
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* @param {Node | null | undefined} [node]
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* Node that might match `selector`, should be an element.
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* @param {Space | null | undefined} [space='html']
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* Name of namespace (`'svg'` or `'html'`).
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* @returns {boolean}
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* Whether `node` matches `selector`.
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*/
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export function matches(selector, node, space) {
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const state = createState(selector, node, space)
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state.one = true
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state.shallow = true
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walk(state, node || undefined)
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return state.results.length > 0
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}
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/**
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* Select the first element that matches `selector` in the given `tree`.
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* Searches the tree in *preorder*.
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*
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* @param {string} selector
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* CSS selector, such as (`h1`, `a, b`).
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* @param {Node | null | undefined} [tree]
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* Tree to search.
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* @param {Space | null | undefined} [space='html']
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* Name of namespace (`'svg'` or `'html'`).
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* @returns {Element | null}
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* First element in `tree` that matches `selector` or `null` if nothing is
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* found.
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* This could be `tree` itself.
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*/
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export function select(selector, tree, space) {
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const state = createState(selector, tree, space)
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state.one = true
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walk(state, tree || undefined)
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// To do in major: return `undefined` instead.
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return state.results[0] || null
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}
59-
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/**
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* Select all elements that match `selector` in the given `tree`.
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* Searches the tree in *preorder*.
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*
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* @param {string} selector
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* CSS selector, such as (`h1`, `a, b`).
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* @param {Node | null | undefined} [tree]
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* Tree to search.
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* @param {Space | null | undefined} [space='html']
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* Name of namespace (`'svg'` or `'html'`).
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* @returns {Array<Element>}
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* Elements in `tree` that match `selector`.
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* This could include `tree` itself.
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*/
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export function selectAll(selector, tree, space) {
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const state = createState(selector, tree, space)
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walk(state, tree || undefined)
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return state.results
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}
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/**
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* @param {string} selector
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* Tree to search.
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* @param {Node | null | undefined} [tree]
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* Tree to search.
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* @param {Space | null | undefined} [space='html']
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* Name of namespace (`'svg'` or `'html'`).
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* @returns {SelectState} SelectState
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*/
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function createState(selector, tree, space) {
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return {
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// State of the query.
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rootQuery: queryToSelectors(parse(selector)),
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results: [],
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// @ts-expect-error assume elements.
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scopeElements: tree ? (tree.type === 'root' ? tree.children : [tree]) : [],
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one: false,
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shallow: false,
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found: false,
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// State in the tree.
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schema: space === 'svg' ? svg : html,
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language: undefined,
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direction: 'ltr',
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editableOrEditingHost: false,
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typeIndex: undefined,
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elementIndex: undefined,
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typeCount: undefined,
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elementCount: undefined
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}
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}
5+
export {matches, select, selectAll} from './lib/index.js'

‎lib/index.js

Lines changed: 109 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,109 @@
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/**
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* @typedef {import('./types.js').Element} Element
3+
* @typedef {import('./types.js').Node} Node
4+
* @typedef {import('./types.js').Space} Space
5+
* @typedef {import('./types.js').SelectState} SelectState
6+
*/
7+
8+
import {html, svg} from 'property-information'
9+
import {queryToSelectors, walk} from './walk.js'
10+
import {parse} from './parse.js'
11+
12+
/**
13+
* Check that the given `node` matches `selector`.
14+
*
15+
* This only checks the element itself, not the surrounding tree.
16+
* Thus, nesting in selectors is not supported (`p b`, `p > b`), neither are
17+
* selectors like `:first-child`, etc.
18+
* This only checks that the given element matches the selector.
19+
*
20+
* @param {string} selector
21+
* CSS selector, such as (`h1`, `a, b`).
22+
* @param {Node | null | undefined} [node]
23+
* Node that might match `selector`, should be an element.
24+
* @param {Space | null | undefined} [space='html']
25+
* Name of namespace (`'svg'` or `'html'`).
26+
* @returns {boolean}
27+
* Whether `node` matches `selector`.
28+
*/
29+
export function matches(selector, node, space) {
30+
const state = createState(selector, node, space)
31+
state.one = true
32+
state.shallow = true
33+
walk(state, node || undefined)
34+
return state.results.length > 0
35+
}
36+
37+
/**
38+
* Select the first element that matches `selector` in the given `tree`.
39+
* Searches the tree in *preorder*.
40+
*
41+
* @param {string} selector
42+
* CSS selector, such as (`h1`, `a, b`).
43+
* @param {Node | null | undefined} [tree]
44+
* Tree to search.
45+
* @param {Space | null | undefined} [space='html']
46+
* Name of namespace (`'svg'` or `'html'`).
47+
* @returns {Element | null}
48+
* First element in `tree` that matches `selector` or `null` if nothing is
49+
* found.
50+
* This could be `tree` itself.
51+
*/
52+
export function select(selector, tree, space) {
53+
const state = createState(selector, tree, space)
54+
state.one = true
55+
walk(state, tree || undefined)
56+
// To do in major: return `undefined` instead.
57+
return state.results[0] || null
58+
}
59+
60+
/**
61+
* Select all elements that match `selector` in the given `tree`.
62+
* Searches the tree in *preorder*.
63+
*
64+
* @param {string} selector
65+
* CSS selector, such as (`h1`, `a, b`).
66+
* @param {Node | null | undefined} [tree]
67+
* Tree to search.
68+
* @param {Space | null | undefined} [space='html']
69+
* Name of namespace (`'svg'` or `'html'`).
70+
* @returns {Array<Element>}
71+
* Elements in `tree` that match `selector`.
72+
* This could include `tree` itself.
73+
*/
74+
export function selectAll(selector, tree, space) {
75+
const state = createState(selector, tree, space)
76+
walk(state, tree || undefined)
77+
return state.results
78+
}
79+
80+
/**
81+
* @param {string} selector
82+
* Tree to search.
83+
* @param {Node | null | undefined} [tree]
84+
* Tree to search.
85+
* @param {Space | null | undefined} [space='html']
86+
* Name of namespace (`'svg'` or `'html'`).
87+
* @returns {SelectState} SelectState
88+
*/
89+
function createState(selector, tree, space) {
90+
return {
91+
// State of the query.
92+
rootQuery: queryToSelectors(parse(selector)),
93+
results: [],
94+
// @ts-expect-error assume elements.
95+
scopeElements: tree ? (tree.type === 'root' ? tree.children : [tree]) : [],
96+
one: false,
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shallow: false,
98+
found: false,
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// State in the tree.
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schema: space === 'svg' ? svg : html,
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language: undefined,
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direction: 'ltr',
103+
editableOrEditingHost: false,
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typeIndex: undefined,
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elementIndex: undefined,
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typeCount: undefined,
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elementCount: undefined
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}
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}

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