A fork of https://github.com/ueokande/vim-vixen
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118 lines
2.8 KiB
118 lines
2.8 KiB
import * as dom from '../shared/utils/dom'; |
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import Key from '../shared/settings/Key'; |
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const cancelKey = (e: KeyboardEvent): boolean => { |
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if (e.key === 'Escape') { |
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return true; |
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} |
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if (e.key === '[' && e.ctrlKey) { |
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return true; |
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} |
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return false; |
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}; |
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const modifiedKeyName = (name: string): string => { |
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if (name === ' ') { |
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return 'Space'; |
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} |
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if (name.length === 1) { |
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return name; |
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} else if (name === 'Escape') { |
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return 'Esc'; |
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} |
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return name; |
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}; |
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// visible for testing |
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export const keyFromKeyboardEvent = (e: KeyboardEvent): Key => { |
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let key = modifiedKeyName(e.key); |
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let shift = e.shiftKey; |
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if (key.length === 1 && key.toUpperCase() === key.toLowerCase()) { |
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// make shift false for symbols to enable key bindings by symbold keys. |
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// But this limits key bindings by symbol keys with Shift |
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// (such as Shift+$>. |
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shift = false; |
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} |
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return new Key({ |
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key: modifiedKeyName(e.key), |
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shift: shift, |
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ctrl: e.ctrlKey, |
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alt: e.altKey, |
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meta: e.metaKey, |
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}); |
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}; |
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export default class InputDriver { |
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private pressed: {[key: string]: string} = {}; |
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private onKeyListeners: ((key: Key) => boolean)[] = []; |
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constructor(target: HTMLElement) { |
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this.pressed = {}; |
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this.onKeyListeners = []; |
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target.addEventListener('keypress', this.onKeyPress.bind(this)); |
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target.addEventListener('keydown', this.onKeyDown.bind(this)); |
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target.addEventListener('keyup', this.onKeyUp.bind(this)); |
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} |
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onKey(cb: (key: Key) => boolean) { |
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this.onKeyListeners.push(cb); |
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} |
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private onKeyPress(e: KeyboardEvent) { |
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if (this.pressed[e.key] && this.pressed[e.key] !== 'keypress') { |
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return; |
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} |
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this.pressed[e.key] = 'keypress'; |
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this.capture(e); |
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} |
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private onKeyDown(e: KeyboardEvent) { |
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if (this.pressed[e.key] && this.pressed[e.key] !== 'keydown') { |
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return; |
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} |
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this.pressed[e.key] = 'keydown'; |
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this.capture(e); |
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} |
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private onKeyUp(e: KeyboardEvent) { |
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delete this.pressed[e.key]; |
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} |
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// eslint-disable-next-line max-statements |
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private capture(e: KeyboardEvent) { |
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let target = e.target; |
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if (!(target instanceof HTMLElement)) { |
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return; |
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} |
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if (this.fromInput(target)) { |
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if (cancelKey(e) && target.blur) { |
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target.blur(); |
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} |
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return; |
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} |
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if (['Shift', 'Control', 'Alt', 'OS'].includes(e.key)) { |
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// pressing only meta key is ignored |
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return; |
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} |
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let key = keyFromKeyboardEvent(e); |
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for (let listener of this.onKeyListeners) { |
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let stop = listener(key); |
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if (stop) { |
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e.preventDefault(); |
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e.stopPropagation(); |
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break; |
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} |
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} |
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} |
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private fromInput(e: Element) { |
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return e instanceof HTMLInputElement || |
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e instanceof HTMLTextAreaElement || |
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e instanceof HTMLSelectElement || |
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dom.isContentEditable(e); |
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} |
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}
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