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OPDS: multiple acquisition links in split buttons
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| customElements.define('foliate-menu', class extends HTMLElement { | ||
| #root = this.attachShadow({ mode: 'closed' }) | ||
| #internals = this.attachInternals() | ||
| #items = [] | ||
| constructor() { | ||
| super() | ||
| this.#internals.role = 'menu' | ||
| const slot = document.createElement('slot') | ||
| this.#root.append(slot) | ||
| slot.addEventListener('slotchange', e => { | ||
| const els = e.target.assignedElements() | ||
| this.#items = els.filter(el => el.matches('[role^="menuitem"]')) | ||
| }) | ||
| this.addEventListener('keydown', e => this.#onKeyDown(e)) | ||
| } | ||
| setFocusPrev(el) { | ||
| this.setFocusNext(el, this.#items.slice(0).reverse()) | ||
| } | ||
| setFocusNext(el, items = this.#items) { | ||
| let justFound, found | ||
| for (const item of items) { | ||
| if (justFound) { | ||
| item.tabIndex = 0 | ||
| item.focus() | ||
| found = true | ||
| justFound = false | ||
| } | ||
| else { | ||
| item.tabIndex = -1 | ||
| if (item === el) justFound = true | ||
| } | ||
| } | ||
| if (!found) { | ||
| items[0].tabIndex = 0 | ||
| items[0].focus() | ||
| } | ||
| } | ||
| #onKeyDown(e) { | ||
| switch (e.key) { | ||
| case 'ArrowUp': | ||
| e.preventDefault() | ||
| e.stopPropagation() | ||
| this.setFocusPrev(e.target) | ||
| break | ||
| case 'ArrowDown': | ||
| e.preventDefault() | ||
| e.stopPropagation() | ||
| this.setFocusNext(e.target) | ||
| break | ||
| } | ||
| } | ||
| }) | ||
|
|
||
| customElements.define('foliate-menubutton', class extends HTMLElement { | ||
| #root = this.attachShadow({ mode: 'open' }) | ||
| #button = document.createElement('button') | ||
| #menu | ||
| #ariaExpandedObserver = new MutationObserver(list => { | ||
| for (const { target } of list) | ||
| target.dispatchEvent(new Event('aria-expanded')) | ||
| }) | ||
| #onBlur = () => this.#button.ariaExpanded = 'false' | ||
| #onClick = e => { | ||
| const target = e.composedPath()[0] | ||
| if (!this.#button.contains(target) && !this.#menu.contains(target)) { | ||
| this.#button.setAttribute('aria-expanded', 'false') | ||
| } | ||
| } | ||
| constructor() { | ||
| super() | ||
| const sheet = new CSSStyleSheet() | ||
| sheet.replaceSync(':host { position: relative }') | ||
| this.#root.adoptedStyleSheets = [sheet] | ||
|
|
||
| this.#root.append(this.#button) | ||
| this.#button.ariaExpanded = 'false' | ||
| this.#button.ariaHasPopup = 'menu' | ||
| this.#button.part = 'button' | ||
|
|
||
| const slot = document.createElement('slot') | ||
| this.#button.append(slot) | ||
|
|
||
| this.#ariaExpandedObserver.observe(this.#button, | ||
| { attributes: true, attributeFilter: ['aria-expanded'] }) | ||
| this.#button.addEventListener('click', () => { | ||
| this.#button.ariaExpanded = | ||
| this.#button.ariaExpanded === 'true' ? 'false' : 'true' | ||
| }) | ||
| this.#button.addEventListener('aria-expanded', () => { | ||
| if (!this.#menu) return | ||
| if (this.#button.ariaExpanded === 'true') { | ||
| this.#menu.hidden = false | ||
| this.#menu.focus() | ||
| } else this.#menu.hidden = true | ||
| }) | ||
|
|
||
| const menuSlot = document.createElement('slot') | ||
| menuSlot.name = 'menu' | ||
| this.#root.append(menuSlot) | ||
| menuSlot.addEventListener('slotchange', e => { | ||
| this.#menu = e.target.assignedElements()[0] | ||
| this.#menu.tabIndex = 0 | ||
| this.#menu.hidden = true | ||
| }) | ||
| menuSlot.addEventListener('keydown', e => e.key === 'Escape' | ||
| ? this.#button.ariaExpanded = 'false' : null) | ||
| } | ||
| connectedCallback() { | ||
| addEventListener('blur', this.#onBlur) | ||
| addEventListener('click', this.#onClick) | ||
| } | ||
| disconnectedCallback() { | ||
| removeEventListener('blur', this.#onBlur) | ||
| removeEventListener('click', this.#onClick) | ||
| } | ||
| }) |