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/*
* SPDX-FileCopyrightText: syuilo and other misskey contributors
* SPDX-License-Identifier: AGPL-3.0-only
*/
import keyCode from './keycode.js';
type Callback = (ev: KeyboardEvent) => void;
type Keymap = Record<string, Callback>;
type Pattern = {
which: string[];
ctrl?: boolean;
shift?: boolean;
alt?: boolean;
};
type Action = {
patterns: Pattern[];
callback: Callback;
allowRepeat: boolean;
};
const parseKeymap = (keymap: Keymap) => Object.entries(keymap).map(([patterns, callback]): Action => {
const result = {
patterns: [],
callback,
allowRepeat: true,
} as Action;
if (patterns.match(/^\(.*\)$/) !== null) {
result.allowRepeat = false;
patterns = patterns.slice(1, -1);
}
result.patterns = patterns.split('|').map(part => {
const pattern = {
which: [],
ctrl: false,
alt: false,
shift: false,
} as Pattern;
const keys = part.trim().split('+').map(x => x.trim().toLowerCase());
for (const key of keys) {
switch (key) {
case 'ctrl': pattern.ctrl = true; break;
case 'alt': pattern.alt = true; break;
case 'shift': pattern.shift = true; break;
default: pattern.which = keyCode(key).map(k => k.toLowerCase());
}
}
return pattern;
});
return result;
});
const ignoreElements = ['input', 'textarea'];
function match(ev: KeyboardEvent, patterns: Action['patterns']): boolean {
const key = ev.key.toLowerCase();
return patterns.some(pattern => pattern.which.includes(key) &&
pattern.ctrl === ev.ctrlKey &&
pattern.shift === ev.shiftKey &&
pattern.alt === ev.altKey &&
!ev.metaKey,
);
}
export const makeHotkey = (keymap: Keymap) => {
const actions = parseKeymap(keymap);
return (ev: KeyboardEvent) => {
if (document.activeElement) {
if (ignoreElements.some(el => document.activeElement!.matches(el))) return;
if (document.activeElement.attributes['contenteditable']) return;
}
for (const action of actions) {
const matched = match(ev, action.patterns);
if (matched) {
if (!action.allowRepeat && ev.repeat) return;
ev.preventDefault();
ev.stopPropagation();
action.callback(ev);
break;
}
}
};
};
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