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弹幕词云

bilibili弹幕词云

当前为 2021-04-13 提交的版本，查看 最新版本。

// ==UserScript==
// @name         弹幕词云
// @namespace    http://tampermonkey.net/
// @version      0.11
// @description  bilibili弹幕词云
// @author       You
// @match        https://www.bilibili.com/bangumi/play/*
// @match        https://www.bilibili.com/video/*
// @grant        none
// @require      https://cdn.bootcdn.net/ajax/libs/wordcloud2.js/1.1.2/wordcloud2.min.js
// ==/UserScript==

(function() {
    'use strict';
    
    // Your code here...
    function geo(){
    console.log("开始")
  //  setInterval(modi,1000);
   init();
}
//======变量=======
var canv;
var canvP;//词云div
var hasCi=false;//词云是否显示
let s=[]//弹幕
let sai=[]//词频
let fail=false;
let tez=[0]//[最大值]
let reqParm=[0,1]
let colorTable=['ffff00','ffff33','ffff66','ffff99','ffffcc','ffffff','ffcc00','ffcc33','ffcc66','ffcc99','ffcccc','ffccff','ff9900','ff9933','ff9966','ff9999','ff99cc','ff99ff','ff6600','ff6633','ff6666','ff6699','ff66cc','ff66ff','ff3300','ff3333','ff3366','ff3399','ff33cc','ff33ff','ff0000','ff0033','ff0066','ff0099','ff00cc','ff00ff']
//======函数======


let moveAble=function(dv,clickFun){
  var x = 0;
  var y = 0;
  var l = 0;
  var t = 0;
  var isDown = false;
  var moved=false;
  //鼠标按下事件
  dv.onmousedown = function(e) {
      //获取x坐标和y坐标
      x = e.clientX;
      y = e.clientY;

      //获取左部和顶部的偏移量
      l = dv.offsetLeft;
      t = dv.offsetTop;
      //开关打开
      isDown = true;
      //设置样式
  }
  //鼠标移动
  window.onmousemove = function(e) {
      if (isDown == false) {
          return;
      }
      //获取x和y
      var nx = e.clientX;
      var ny = e.clientY;
      //计算移动后的左偏移量和顶部的偏移量
      var nl = nx - (x - l);
      var nt = ny - (y - t);
      moved=true;
      dv.style.left = nl + 'px';
      dv.style.top = nt + 'px';
  }
  //鼠标抬起事件
  dv.onmouseup = function() {
      if(moved) {
          moved=false;
      }else if(clickFun){
          clickFun();
      }
      //开关关闭
      isDown = false;
  }
}
var init=()=>{
  var cibtn= document.createElement("div");
  var cibtnBg= document.createElement("div");
  cibtnBg.style="position:relative;top:-17px;background: linear-gradient(45deg , #e5c0ff, skyblue);border-radius: 4px;filter: blur(15px);width: 54px;height: 30px;"
  cibtn.innerText='词云'
  cibtn.style='user-select:none;overflow:hidden;position:fixed;top:20px;z-index:999999;left:40px;width: 54px;height: 30px;border-radius: 3px;font-size: 22px;padding: 4px;cursor: pointer;'
  cibtn.append(cibtnBg);
  moveAble(cibtn,ciw)
  document.body.append(cibtn)
  var sty=document.createElement("style");
  sty.innerHTML=` .blura{
    animation: 1s animatea 1 linear;
  }
  .blura:hover{
    animation: 2s animateb 1 linear;
  }
  @keyframes animatea{
  0%{ text-shadow: 0 0 0 white; }
  50%{
    color: rgba(238, 235, 235, 0.8);
    text-shadow: 0 0 30px rgb(216, 227, 243);
  }
  100%{ text-shadow: 0 0 40px white; }
  }
  @keyframes animateb{
    0%{ text-shadow: 0 0 0px rgba(255,255,255,0); }
    50%{
      color: rgba(255, 255, 255, 0.925);
      text-shadow: 0 0 10px rgb(184, 245, 242);
    }
    100%{ text-shadow: 0 0 0 white; }
  }`
  document.head.append(sty)
  canv=document.createElement("div");
  canvP=document.createElement("div");
  canvP.append(canv);
  canv.style="height: 700px;width: 1200px;"
  canvP.style="height: 700px;width: 1200px;position:fixed;top:50px;left:60px;z-index:999999";
  document.body.append(canvP)
  canvP.setAttribute("hidden",true);
  moveAble(canvP)
}

var modi=()=>{
  var dms=$(".b-danmaku");
  for(var i=0;i<dms.length;i++){
      if(dms[i].innerHTML.indexOf("div")==-1){
          var s=dms[i].style.fontSize.replace("px","")
          var l=dms[i].innerHTML.length*s+"px"
          dms[i].innerHTML=` <div style="overflow: hidden;height: `+dms[i].style.fontSize+`;width: `+l+`">
          <div style="position: relative;top: -32px;">`+dms[i].innerHTML+`</div>
          <div style="width: 100%;
          height:  100%;
          background: linear-gradient(45deg , #e5c0ff, skyblue);
          border-radius: 4px;
          filter: blur(20px);
          position: relative;
          top: -90px;"></div>
      </div>`
      }
  }
}
//产生词云
function ciw(){
  if(hasCi) {
      canvP.setAttribute("hidden",true);
      hasCi=false;
      return;
  };
  console.log('生成词云');
  var list=sai;
  if(sai.length==0) analysi();
  canvP.removeAttribute("hidden");
  WordCloud([canv], 
  { 
   list: list,
   color: colorw, //'random-light'
   backgroundColor: 'rgba(125,100,125,0.8)',
   gridSize: 18,
   weightFactor: 200/tez[0],
  fontFamily: 'Times, serif',
  rotateRatio: 0.5,
  classes: "blura",
  rotationSteps: 2
} );
hasCi=true;
}

let colorw=(wd,weight)=>{
  //tez[0]红色 #ff0000
  //1=>蓝色 #0000ff
  console.log(wd,weight,tez[0])
  let v=parseInt((colorTable.length-1)*weight/(tez[0]))
  return '#'+colorTable[v];
  // let v=parseInt(512*weight/(tez[0]))-1
  // return 'rgb('+(v>255?(v-255):125)+','+(v<255?v:510-v)+','+(v<255?255-v:125)+')';
}

let analysi=()=>{
  loadParam()
  console.log("等待弹幕获取完成")
  getOneSeg(1)
  // while(!fail){
  //   console.log("等待弹幕获取完成")
  // }
  return cia(3);
}

let getOneSeg=(seg)=>{
  let regex=/:.(.*?)[�@]/
  $.ajax({
　　　　　　　url:'https://api.bilibili.com/x/v2/dm/web/seg.so?type=1&oid='+reqParm[0]+'&pid='+reqParm[1]+'&segment_index='+seg,
　　　　　　　data:{},
            async:false,
            cache:false,       
            ifModified :true,
　　　　　　type:'GET',
　　　　　　success:function(re, textStatus, xhr){ //成功回调函数
              if(xhr.status!=200) {
                console.log("失败点:",seg)
                fail=true
                return;
              }
              let ss=re.split('\n');
              ss.forEach(e=>{
                let dm=regex.exec(e);
                if(dm&&dm[1])
                s.push(dm[1])
              })
              console.log(s);
              sleep(500)
              getOneSeg(seg+1)
　　　　　　　},
　　　　　　error:function (err){ //失败回调函数
            fail=true;
            console.log("失败点:",seg)
　　　　　　　console.log(err);
　　　　　　　}
　　　　　　});
}
function cia(l){
  console.log('分析弹幕...')
  let wds=[]
  s.forEach(e => {
    e=e.replace(/[\ |\~|\`|\!|\@|\#|\$|\%|\^|\&|\*|\(|\)|\-|\_|\+|\=|\||\\|\[|\]|\{|\}|\;|\:|\"|\'|\,|\<|\.|\>|\/|\?]/g,"");
    ctin(wds,e)
  });
  wds.forEach(e=>{
  if(e[1]>=l) {
    if(tez[0]<e[1]) tez[0]=e[1]
    sai.push(e)
  }
  })
  console.log("最大次数:",tez[0])
  console.log("筛选结果:",sai)
  return sai;
}
function ctin(a,b){
  var h=true;
  for(let i in a){
    if(a[i][0].indexOf(b)>-1||xiangsi(a[i][0],b)){
      a[i][1]+=1;
      h=false;
    } 
}
if(h){
  a.push([b,0])
}
}
let xiangsi=(a,b)=>{
  if(xiangsi0(a,b)||xiangsi0(b,a)) return true;
  return false;
}
let xiangsi0=(a,b)=>{
  let m=a.split('')
  let c=0;
  m.forEach(e=>{
    if(b.indexOf(e)>-1) c++;
  })
  if(c/m.length>=0.5) return true;
  return false;
}

let loadParam=()=>{
  reqParm= [window.cid,window.aid]
  console.log('找到参数:',reqParm)
}

function sleep(numberMillis) {
	var now = new Date();
	var exitTime = now.getTime() + numberMillis;
	while (true) {
		now = new Date();
		if (now.getTime() > exitTime)
		return;
	    }
}
geo();
})();

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