v12 (#5712)

Co-authored-by: MeiMei <30769358+mei23@users.noreply.github.com>
Co-authored-by: Satsuki Yanagi <17376330+u1-liquid@users.noreply.github.com>

src/client/scripts/hotkey.ts

@@ -0,0 +1,106 @@
+import keyCode from './keycode';
+import { concat } from '../../prelude/array';
+
+type pattern = {
+	which: string[];
+	ctrl?: boolean;
+	shift?: boolean;
+	alt?: boolean;
+};
+
+type action = {
+	patterns: pattern[];
+
+	callback: Function;
+};
+
+const getKeyMap = keymap => Object.entries(keymap).map(([patterns, callback]): action => {
+	const result = {
+		patterns: [],
+		callback: callback
+	} as action;
+
+	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 ignoreElemens = ['input', 'textarea'];
+
+function match(e: KeyboardEvent, patterns: action['patterns']): boolean {
+	const key = e.code.toLowerCase();
+	return patterns.some(pattern => pattern.which.includes(key) &&
+		pattern.ctrl == e.ctrlKey &&
+		pattern.shift == e.shiftKey &&
+		pattern.alt == e.altKey &&
+		!e.metaKey
+	);
+}
+
+export default {
+	install(Vue) {
+		Vue.directive('hotkey', {
+			bind(el, binding) {
+				el._hotkey_global = binding.modifiers.global === true;
+
+				const actions = getKeyMap(binding.value);
+
+				// flatten
+				const reservedKeys = concat(actions.map(a => a.patterns));
+
+				el._misskey_reservedKeys = reservedKeys;
+
+				el._keyHandler = (e: KeyboardEvent) => {
+					const targetReservedKeys = document.activeElement ? ((document.activeElement as any)._misskey_reservedKeys || []) : [];
+					if (document.activeElement && ignoreElemens.some(el => document.activeElement.matches(el))) return;
+
+					for (const action of actions) {
+						const matched = match(e, action.patterns);
+
+						if (matched) {
+							if (el._hotkey_global && match(e, targetReservedKeys)) return;
+
+							e.preventDefault();
+							e.stopPropagation();
+							action.callback(e);
+							break;
+						}
+					}
+				};
+
+				if (el._hotkey_global) {
+					document.addEventListener('keydown', el._keyHandler);
+				} else {
+					el.addEventListener('keydown', el._keyHandler);
+				}
+			},
+
+			unbind(el) {
+				if (el._hotkey_global) {
+					document.removeEventListener('keydown', el._keyHandler);
+				} else {
+					el.removeEventListener('keydown', el._keyHandler);
+				}
+			}
+		});
+	}
+};