66 lines
2.0 KiB
JavaScript
66 lines
2.0 KiB
JavaScript
// 输入：IWBT 经典键位（Shift 跳 / Z 跳 / X 射击 / R 重来）
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const BIND = {
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left: ['ArrowLeft', 'KeyA'],
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right: ['ArrowRight', 'KeyD'],
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up: ['ArrowUp', 'KeyW'],
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down: ['ArrowDown', 'KeyS'],
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jump: ['ShiftLeft', 'ShiftRight', 'Space', 'KeyZ', 'KeyN'],
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shoot: ['KeyX', 'KeyJ', 'KeyC', 'KeyM'],
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suicide: ['KeyR'], // IWBT 标准：自杀并回到最近存档点
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restart: ['Backspace'], // 整关从头再来（放弃所有存档点）
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pause: ['Escape', 'KeyP'],
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menu: ['KeyQ'],
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};
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const down = new Set(); // 当前按住的原始 code
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const now = {}; // action 是否按下
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const prev = {}; // 上一帧
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const blocked = new Set(['Space', 'ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight', 'Tab']);
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export const Input = {
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enabled: true,
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/** 是否按下 */
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is(action) { return !!now[action]; },
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/** 本帧刚按下 */
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hit(action) { return !!now[action] && !prev[action]; },
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/** 本帧刚松开 */
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released(action) { return !now[action] && !!prev[action]; },
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raw(code) { return down.has(code); },
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anyHit() { for (const k in now) if (now[k] && !prev[k]) return true; return false; },
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clear() {
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down.clear();
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for (const k in now) now[k] = false;
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for (const k in prev) prev[k] = false;
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},
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/** 每逻辑帧末尾调用 */
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endFrame() {
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for (const k in now) prev[k] = now[k];
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},
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};
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function refresh() {
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for (const act in BIND) {
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let v = false;
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for (const c of BIND[act]) if (down.has(c)) { v = true; break; }
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now[act] = Input.enabled ? v : false;
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}
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}
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addEventListener('keydown', e => {
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if (blocked.has(e.code)) e.preventDefault();
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if (e.repeat) return;
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down.add(e.code);
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refresh();
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});
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addEventListener('keyup', e => {
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down.delete(e.code);
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refresh();
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});
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addEventListener('blur', () => { down.clear(); refresh(); });
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// 初始化
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for (const act in BIND) { now[act] = false; prev[act] = false; }
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export const ACTIONS = Object.keys(BIND);
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