// ==UserScript==
// @name         快捷键粘贴当前时间文本
// @namespace    http://tampermonkey.net/
// @version      0.4
// @description  使用键盘快捷键【Ctrl+Shift+T】快速粘贴当前时间文本到当前输入框当前光标位置
// @author       PY-DNG
// @include      *
// @grant        none
// @downloadURL none
// ==/UserScript==

document.onkeydown = function hotkey(){
  // 获取按键代码
  let keycode = window.event.keyCode
  // 检测快捷键[Ctrl+Shift+T]是否被触发
  if (keycode === 84 && event.ctrlKey && event.shiftKey){
    // 获取日期时间文本
    let d = new Date();
    let timetext = d.getFullYear().toString() + "年" + d.getMonth().toString() + "月" + d.getDate().toString() + "日 " + d.getHours().toString() + ":" + d.getMinutes().toString() + ":" + d.getSeconds().toString();
    let CT = document.activeElement;
    let CPS = getTextselection(false);
    let CPE = getTextselection(true);
    CT.value = CT.value.substring(0, CPS) + timetext + CT.value.substring(CPE, CT.value.length);
    CPE = CPS + timetext.length;
    CT.setSelectionRange(CPE, CPE);
    CT.focus();
  }
}

function getTextselection(End) {
    var oText = document.activeElement;
    var cursurPosition = -1;
    if(End){ // 获取选定区域结尾位置
        cursurPosition = oText.selectionEnd;
    }else{   // 获取选定区域起始位置
        if (oText.selectionStart) { //正常
            cursurPosition = oText.selectionStart;
        } else { //在最左边
            cursurPosition = 0;
        }
    }
    if(cursurPosition == undefined){cursurPosition = 0};
    return cursurPosition;
}