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feat: add arrow navigation to projects
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -87,3 +87,8 @@ export default { | |
| }, | ||
| }; | ||
| </script> | ||
| <style> | ||
| .project-card.is-active { | ||
| @apply ring-2 ring-primary; | ||
| } | ||
| </style> | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| class EventHandler { | ||
| constructor() { | ||
| this.keydownHandler = this._keydownHandler.bind(this); | ||
| } | ||
|
|
||
| activeItemIndex() { | ||
| return this.items.indexOf(this.activeItem); | ||
| } | ||
|
|
||
| getBreakpoint() { | ||
| let breakpoint = this.breakpoints?.default || 1; | ||
|
|
||
| Object.keys(this.breakpoints || {}).forEach((mediaQuery) => { | ||
| if (window.matchMedia(mediaQuery).matches) | ||
| breakpoint = this.breakpoints[mediaQuery]; | ||
| }); | ||
|
|
||
| return breakpoint; | ||
| } | ||
|
|
||
| _keydownHandler(event) { | ||
| const keyHandlers = { | ||
| ArrowUp: this.upHandler.bind(this), | ||
| ArrowDown: this.downHandler.bind(this), | ||
| ArrowLeft: this.leftHandler.bind(this), | ||
| ArrowRight: this.rightHandler.bind(this), | ||
| }; | ||
| const elementBlacklist = ['INPUT', 'SELECT', 'TEXTAREA']; | ||
| const isInBlacklist = elementBlacklist.includes(event.target.tagName); | ||
|
|
||
| if (keyHandlers[event.key] && !isInBlacklist) { | ||
| event.preventDefault(); | ||
|
|
||
| this.activeItem?.classList.remove(...this.activeClass); | ||
| keyHandlers[event.key](); | ||
| this.activeItem?.classList.add(...this.activeClass); | ||
| this.activeItem?.scrollIntoView({ behavior: 'smooth', block: 'center' }); | ||
| } else if (event.key === 'Enter') { | ||
| this._fireEvent('select', this.activeItem); | ||
| } | ||
|
|
||
| this._fireEvent('keydown', event, this.activeItem); | ||
| } | ||
|
|
||
| upHandler() { | ||
| const brekpoint = this.getBreakpoint(); | ||
| const prevIndex = this.activeItemIndex() - brekpoint; | ||
|
|
||
| if (prevIndex < 0) this.activeItem = this.items[this.items.length - 1]; | ||
| else this.activeItem = this.items[prevIndex]; | ||
| } | ||
|
|
||
| downHandler() { | ||
| const brekpoint = this.getBreakpoint(); | ||
| const nextIndex = this.activeItemIndex() + brekpoint; | ||
|
|
||
| if (nextIndex > this.items.length - 1) this.activeItem = this.items[0]; | ||
| else this.activeItem = this.items[nextIndex]; | ||
| } | ||
|
|
||
| leftHandler() { | ||
| const index = this.activeItemIndex(); | ||
| const prevItem = this.items[index - 1]; | ||
|
|
||
| if (prevItem) this.activeItem = prevItem; | ||
| else if (index <= 0) this.activeItem = this.items[this.items.length - 1]; | ||
| } | ||
|
|
||
| rightHandler() { | ||
| const index = this.activeItemIndex(); | ||
| const nextItem = this.items[index + 1]; | ||
|
|
||
| if (nextItem) this.activeItem = nextItem; | ||
| else if (index + 1 > this.items.length - 1) this.activeItem = this.items[0]; | ||
| } | ||
| } | ||
|
|
||
| class KeyboardNavigation extends EventHandler { | ||
| constructor({ | ||
| container = document, | ||
| itemSelector = '', | ||
| activeClass = 'is-active', | ||
| breakpoints, | ||
| }) { | ||
| super(); | ||
|
|
||
| this.itemSelector = itemSelector; | ||
| this.activeClass = activeClass.split(' '); | ||
| this.breakpoints = breakpoints; | ||
| this.container = | ||
| typeof container === 'string' | ||
| ? document.querySelector(container) | ||
| : container; | ||
| this.activeItem = null; | ||
| this.items = []; | ||
| this.listeners = {}; | ||
|
|
||
| this._retrieveItems(); | ||
| window.addEventListener('keydown', this.keydownHandler); | ||
| } | ||
|
|
||
| on(name, callback) { | ||
| (this.listeners[name] = this.listeners[name] || []).push(callback); | ||
| } | ||
|
|
||
| refresh() { | ||
| this._retrieveItems(); | ||
| this.activeItem?.classList.remove(...this.activeClass); | ||
| this.activeItem = null; | ||
| } | ||
|
|
||
| destroy() { | ||
| window.removeEventListener('keydown', this.keydownHandler); | ||
|
|
||
| this.listeners = {}; | ||
| this.activeItem?.classList.remove(...this.activeClass); | ||
| } | ||
|
|
||
| setOptions(options = {}, refresh = true) { | ||
| const mutableKeys = [ | ||
| 'container', | ||
| 'itemSelector', | ||
| 'activeClass', | ||
| 'breakpoints', | ||
| ]; | ||
|
|
||
| for (const key in options) { | ||
| if (!mutableKeys.includes(key)) continue; | ||
|
|
||
| this[key] = options[key]; | ||
| } | ||
|
|
||
| if (refresh) this.refresh(); | ||
| } | ||
|
|
||
| _retrieveItems() { | ||
| this.items = [...this.container.querySelectorAll(this.itemSelector)]; | ||
| } | ||
|
|
||
| _fireEvent(name, ...params) { | ||
| (this.listeners[name] || []).forEach((callback) => { | ||
| callback(...params); | ||
| }); | ||
| } | ||
| } | ||
|
|
||
| export default KeyboardNavigation; |