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rename tag-observer exports #253

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merged 1 commit into from
May 24, 2022
Merged

rename tag-observer exports #253

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14 changes: 7 additions & 7 deletions src/tag-observer.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,7 @@ function closestShadowPiercing(el: Element, tagName: string): Element | null {
return closest
}

export const tags = (el: Element, tag: string, parse: Parse) =>
export const parseElementTags = (el: Element, tag: string, parse: Parse) =>
(el.getAttribute(tag) || '')
.trim()
.split(/\s+/g)
Expand All @@ -26,34 +26,34 @@ const observer = new MutationObserver((mutations: MutationRecord[]) => {

if (el instanceof Element && registry.has(tag)) {
const [parse, found] = registry.get(tag)!
for (const [tagName, ...meta] of tags(el, tag, parse)) {
for (const [tagName, ...meta] of parseElementTags(el, tag, parse)) {
const controller = closestShadowPiercing(el, tagName)
if (controller) found(el, controller, tag, ...meta)
}
}
} else if (mutation.addedNodes.length) {
for (const node of mutation.addedNodes) {
if (node instanceof Element) add(node)
if (node instanceof Element) observeElementForTags(node)
}
}
}
})

export const register = (tag: string, parse: Parse, found: Found) => {
export const registerTag = (tag: string, parse: Parse, found: Found) => {
if (registry.has(tag)) throw new Error('duplicate tag')
registry.set(tag, [parse, found])
}

export const add = (root: Element | ShadowRoot) => {
export const observeElementForTags = (root: Element | ShadowRoot) => {
for (const [tag, [parse, found]] of registry) {
for (const el of root.querySelectorAll(`[${tag}]`)) {
for (const [tagName, ...meta] of tags(el, tag, parse)) {
for (const [tagName, ...meta] of parseElementTags(el, tag, parse)) {
const controller = closestShadowPiercing(el, tagName)
if (controller) found(el, controller, tag, ...meta)
}
}
if (root instanceof Element && root.hasAttribute(tag)) {
for (const [tagName, ...meta] of tags(root, tag, parse)) {
for (const [tagName, ...meta] of parseElementTags(root, tag, parse)) {
const controller = closestShadowPiercing(root, tagName)
if (controller) found(root, controller, tag, ...meta)
}
Expand Down
18 changes: 9 additions & 9 deletions test/tag-observer.ts
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
import {expect, fixture, html} from '@open-wc/testing'
import {fake, match} from 'sinon'
import {register, add} from '../src/tag-observer.js'
import {registerTag, observeElementForTags} from '../src/tag-observer.js'

describe('tag observer', () => {
let instance: HTMLElement
Expand All @@ -11,20 +11,20 @@ describe('tag observer', () => {
})

it('can register new tag observers', () => {
register('foo', fake(), fake())
registerTag('foo', fake(), fake())
})

it('throws an error when registering a duplicate', () => {
register('duplicate', fake(), fake())
expect(() => register('duplicate', fake(), fake())).to.throw()
registerTag('duplicate', fake(), fake())
expect(() => registerTag('duplicate', fake(), fake())).to.throw()
})

describe('registered behaviour', () => {
const testParse = fake(v => v.split('.'))
const testFound = fake()
register('data-tagtest', testParse, testFound)
registerTag('data-tagtest', testParse, testFound)
beforeEach(() => {
add(instance)
observeElementForTags(instance)
})

it('uses parse to extract tagged element values', () => {
Expand All @@ -43,7 +43,7 @@ describe('tag observer', () => {
it('calls found if added to a node that has tags on itself', () => {
const div = document.createElement('div')
div.setAttribute('data-tagtest', 'div.j.k.l')
add(div)
observeElementForTags(div)
expect(testParse).to.be.calledWithExactly('div.j.k.l')
expect(testFound).to.be.calledWithExactly(div, div, 'data-tagtest', 'j', 'k', 'l')
})
Expand All @@ -54,7 +54,7 @@ describe('tag observer', () => {
const span = document.createElement('span')
span.setAttribute('data-tagtest', 'div.m.n.o')
shadow.append(span)
add(span)
observeElementForTags(span)
expect(testParse).to.be.calledWithExactly('div.m.n.o')
expect(testFound).to.be.calledWithExactly(span, div, 'data-tagtest', 'm', 'n', 'o')
})
Expand All @@ -65,7 +65,7 @@ describe('tag observer', () => {
const span = document.createElement('span')
span.setAttribute('data-tagtest', 'div.p.q.r')
shadow.append(span)
add(shadow)
observeElementForTags(shadow)
expect(testParse).to.be.calledWithExactly('div.p.q.r')
expect(testFound).to.be.calledWithExactly(span, div, 'data-tagtest', 'p', 'q', 'r')
})
Expand Down