jホールドでリピート開始/リピート中にjで加速/他キーで停止
// ==UserScript==
// @name Repeat Key
// @author to
// @namespace https://github.com/to
// @version 0.2
// @match https://twitter.com/*
// @description jホールドでリピート開始/リピート中にjで加速/他キーで停止
// @icon https://www.google.com/s2/favicons?domain=twitter.com
// @license MIT
// ==/UserScript==
(function() {
const opt = {
hold: 250,
interval: 800,
decrement: 200,
min: 400,
key: 'j',
};
// keypressイベントではcharCode(小文字)が使われる
opt.charCode = opt.key.charCodeAt(0);
opt.keyCode = opt.charCode - 32;
var repeater = {
onMouseDown: function name(params) {
this.state.stop();
},
onKeyDown: function (e) {
if (e.fake)
return;
// 対象外のキーか？
if (e.keyCode != opt.keyCode) {
this.state.stop();
return;
}
if (e.repeat)
repeater.cancelEvent(e);
this.state.onKeyDown(e);
},
onKeyPress: function (e) {
// 対象外のキーか？
if (e.fake || e.keyCode != opt.charCode)
return;
this.state.onKeyPress(e);
},
onKeyUp: function (e) {
// 対象外のキーか？
if (e.fake || e.keyCode != opt.keyCode)
return;
this.state.onKeyUp(e);
},
startRepeat: function () {
// 既存のリピートを停止する
this.stopRepeat();
this.timer = setInterval(() => {
repeater.dispatchEvent();
}, repeater.interval);
},
dispatchEvent: function () {
document.dispatchEvent(repeater.createEvent('keydown'));
document.dispatchEvent(repeater.createEvent('keypress'));
document.dispatchEvent(repeater.createEvent('keyup'));
},
createEvent: function (type) {
let event = new KeyboardEvent(type, {
keyCode: type == 'keypress' ? opt.charCode : opt.keyCode,
key: opt.key,
bubbles: true,
});
// 生成したイベントにフラグを付加し、判別に用いる
event.fake = true;
return event;
},
stopRepeat: function () {
clearInterval(this.timer);
},
cancelEvent: function (event) {
// 他ハンドラも含めて伝播を完全に停止する
event.preventDefault();
event.stopPropagation();
event.stopImmediatePropagation();
},
states: {
normal: {
onKeyDown: function (e) {
// ホールド開始時刻を保存する
repeater.start = Date.now();
repeater.state = repeater.states.holding;
},
onKeyPress: function (e) { },
onKeyUp: function (e) { },
stop: function () { },
},
holding: {
onKeyDown: function (e) {
// ホールド開始から一定時間が経過していないか？
if (Date.now() < (repeater.start + opt.hold))
return;
// リピート開始前にkeyupを発生させ、一連のキー押下を終わらせる
document.dispatchEvent(repeater.createEvent('keyup'));
repeater.interval = opt.interval;
repeater.startRepeat();
repeater.state = repeater.states.repeating;
},
onKeyPress: function e() { },
onKeyUp: function (e) {
repeater.state = repeater.states.normal;
},
stop: function () { },
},
repeating: {
onKeyDown: function (e) {
if (e.repeat)
return;
repeater.cancelEvent(e);
// リピート間隔を減らす
repeater.interval = Math.max(repeater.interval - opt.decrement, opt.min);
repeater.startRepeat();
},
onKeyPress: function (e) {
repeater.cancelEvent(e);
},
onKeyUp: function (e) {
repeater.cancelEvent(e);
},
stop: function () {
repeater.stopRepeat();
repeater.state = repeater.states.normal;
},
},
}
};
repeater.state = repeater.states.normal;
document.addEventListener('keydown', repeater.onKeyDown.bind(repeater), true);
document.addEventListener('keypress', repeater.onKeyPress.bind(repeater), true);
document.addEventListener('keyup', repeater.onKeyUp.bind(repeater), true);
document.addEventListener('mousedown', repeater.onMouseDown.bind(repeater), true);
})();