67 lines
1.4 KiB
JavaScript
67 lines
1.4 KiB
JavaScript
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import { isArray } from 'min-dash';
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export var KEYS_COPY = [ 'c', 'C' ];
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export var KEYS_PASTE = [ 'v', 'V' ];
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export var KEYS_REDO = [ 'y', 'Y' ];
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export var KEYS_UNDO = [ 'z', 'Z' ];
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/**
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* Returns true if event was triggered with any modifier
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* @param {KeyboardEvent} event
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*/
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export function hasModifier(event) {
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return (event.ctrlKey || event.metaKey || event.shiftKey || event.altKey);
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}
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/**
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* @param {KeyboardEvent} event
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*/
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export function isCmd(event) {
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// ensure we don't react to AltGr
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// (mapped to CTRL + ALT)
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if (event.altKey) {
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return false;
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}
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return event.ctrlKey || event.metaKey;
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}
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/**
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* Checks if key pressed is one of provided keys.
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*
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* @param {string|Array<string>} keys
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* @param {KeyboardEvent} event
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*/
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export function isKey(keys, event) {
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keys = isArray(keys) ? keys : [ keys ];
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return keys.indexOf(event.key) !== -1 || keys.indexOf(event.code) !== -1;
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}
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/**
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* @param {KeyboardEvent} event
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*/
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export function isShift(event) {
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return event.shiftKey;
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}
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export function isCopy(event) {
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return isCmd(event) && isKey(KEYS_COPY, event);
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}
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export function isPaste(event) {
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return isCmd(event) && isKey(KEYS_PASTE, event);
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}
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export function isUndo(event) {
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return isCmd(event) && !isShift(event) && isKey(KEYS_UNDO, event);
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}
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export function isRedo(event) {
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return isCmd(event) && (
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isKey(KEYS_REDO, event) || (
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isKey(KEYS_UNDO, event) && isShift(event)
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)
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);
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}
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