telegram-crawler/data/telegram.org/js/tgsticker.js

var RLottie = (function () {
  var rlottie = {}, apiInitStarted = false, apiInited = false, initCallbacks = [];
  var deviceRatio = window.devicePixelRatio || 1;
  var rlottieWorkers = [], curWorkerNum = 0;

  var startTime = +(new Date());
  function dT() {
    return '[' + ((+(new Date()) - startTime)/ 1000.0) + '] ';
  }

  rlottie.Api = {};
  rlottie.players = Object.create(null);;
  rlottie.WORKERS_LIMIT = 4;

  var reqId = 0;
  var mainLoopTO = false;
  var checkViewportDate = false;
  var lastRenderDate = false;

  var userAgent = window.navigator.userAgent;
  var isSafari = !!window.safari ||
                 !!(userAgent && (/\b(iPad|iPhone|iPod)\b/.test(userAgent) || (!!userAgent.match('Safari') && !userAgent.match('Chrome'))));
  var isRAF = isSafari;
  rlottie.isSafari = isSafari;

  function wasmIsSupported() {
    try {
      if (typeof WebAssembly === 'object' &&
          typeof WebAssembly.instantiate === 'function') {
        const module = new WebAssembly.Module(Uint8Array.of(
          0x0, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00
        ));
        if (module instanceof WebAssembly.Module) {
          return new WebAssembly.Instance(module) instanceof WebAssembly.Instance;
        }
      }
    } catch (e) {}
    return false;
  }

  function isSupported() {
    return (
      wasmIsSupported() &&
      typeof Uint8ClampedArray !== 'undefined' &&
      typeof Worker !== 'undefined' &&
      typeof ImageData !== 'undefined'
    );
  }

  rlottie.isSupported = isSupported();

  function mainLoop() {
    var key, rlPlayer, delta, rendered;
    var isEmpty = true;
    var now = +Date.now();
    var checkViewport = !checkViewportDate || (now - checkViewportDate) > 1000;
    for (key in rlottie.players) {
      rlPlayer = rlottie.players[key];
      if (rlPlayer &&
          rlPlayer.frameCount) {
        delta = now - rlPlayer.frameThen;
        if (delta > rlPlayer.frameInterval) {
          rendered = render(rlPlayer, checkViewport);
          if (rendered) {
            lastRenderDate = now;
          }
        }
      }
    }
    var delay = now - lastRenderDate < 100 ? 16 : 500;
    if (delay < 20 && isRAF) {
      mainLoopTO = requestAnimationFrame(mainLoop)
    } else {
      mainLoopTO = setTimeout(mainLoop, delay);
    }
    if (checkViewport) {
      checkViewportDate = now;
    }
  }
  function setupMainLoop() {
    var isEmpty = true, key, rlPlayer;
    for (key in rlottie.players) {
      rlPlayer = rlottie.players[key];
      if (rlPlayer &&
          rlPlayer.frameCount) {
        isEmpty = false;
        break;
      }
    }
    if ((mainLoopTO !== false) === isEmpty) {
      if (isEmpty) {
        if (isRAF) {
          cancelAnimationFrame(mainLoopTO);
        }
        try {
          clearTimeout(mainLoopTO);
        } catch (e) {};
        mainLoopTO = false;
      } else {
        if (isRAF) {
          mainLoopTO = requestAnimationFrame(mainLoop);
        } else {
          mainLoopTO = setTimeout(mainLoop, 0);
        }
      }
    }
  }

  function initApi(callback) {
    if (apiInited) {
      callback && callback();
    } else {
      callback && initCallbacks.push(callback);
      if (!apiInitStarted) {
        console.log(dT(), 'tgsticker init');
        apiInitStarted = true;
        var workersRemain = rlottie.WORKERS_LIMIT;
        var firstRlottieWorker = rlottieWorkers[0] = new QueryableWorker('/js/tgsticker-worker.js?12');
        firstRlottieWorker.addListener('ready', function () {
          console.log(dT(), 'worker #0 ready');
          firstRlottieWorker.addListener('frame', onFrame);
          firstRlottieWorker.addListener('loaded', onLoaded);
          --workersRemain;
          if (!workersRemain) {
            console.log(dT(), 'workers ready');
            apiInited = true;
            for (var i = 0; i < initCallbacks.length; i++) {
              initCallbacks[i]();
            }
            initCallbacks = [];
          } else {
            for (var workerNum = 1; workerNum < rlottie.WORKERS_LIMIT; workerNum++) {
              (function(workerNum) {
                var rlottieWorker = rlottieWorkers[workerNum] = new QueryableWorker('/js/tgsticker-worker.js?12');
                rlottieWorker.addListener('ready', function () {
                  console.log(dT(), 'worker #' + workerNum + ' ready');
                  rlottieWorker.addListener('frame', onFrame);
                  rlottieWorker.addListener('loaded', onLoaded);
                  --workersRemain;
                  if (!workersRemain) {
                    console.log(dT(), 'workers ready');
                    apiInited = true;
                    for (var i = 0; i < initCallbacks.length; i++) {
                      initCallbacks[i]();
                    }
                    initCallbacks = [];
                  }
                });
              })(workerNum);
            }
          }
        });
      }
    }
  }

  function destroyWorkers() {
    for (var workerNum = 0; workerNum < rlottie.WORKERS_LIMIT; workerNum++) {
      if (rlottieWorkers[workerNum]) {
        rlottieWorkers[workerNum].terminate();
        console.log('worker #' + workerNum + ' terminated');
      }
    }
    console.log('workers destroyed');
    apiInitStarted = apiInited = false;
    rlottieWorkers = [];
  }

  function initPlayer(el, options) {
    if (el.rlPlayer) return;
    if (el.tagName.toLowerCase() != 'picture') {
      console.warn('only picture tag allowed');
      return;
    }
    options = options || {};
    var rlPlayer = el.rlPlayer = {};
    rlPlayer.thumb = el.querySelector('img');
    var tgs_source = el.querySelector('source[type="application/x-tgsticker"]');
    var url = tgs_source && tgs_source.getAttribute('srcset') || '';
    if (!url) {
      console.warn('picture source application/x-tgsticker not found');
      return;
    }
    var pic_width = el.clientWidth || el.getAttribute('width');
    var pic_height = el.clientHeight || el.getAttribute('height');
    var curDeviceRatio = options.maxDeviceRatio ? Math.min(options.maxDeviceRatio, deviceRatio) : deviceRatio;
    if (!pic_width || !pic_height) {
      pic_width = pic_height = 256;
    }
    rlPlayer.reqId = ++reqId;
    rlottie.players[reqId] = rlPlayer;
    rlPlayer.el = el;
    rlPlayer.nextFrameNo = false;
    rlPlayer.frames = {};
    rlPlayer.width = Math.trunc(pic_width * curDeviceRatio);
    rlPlayer.height = Math.trunc(pic_height * curDeviceRatio);
    rlPlayer.rWorker = rlottieWorkers[curWorkerNum++];
    if (curWorkerNum >= rlottieWorkers.length) {
      curWorkerNum = 0;
    }
    rlPlayer.options = options;
    rlPlayer.paused = false;
    rlPlayer.times = [];
    rlPlayer.clamped = new Uint8ClampedArray(rlPlayer.width * rlPlayer.height * 4);
    rlPlayer.imageData = new ImageData(rlPlayer.width, rlPlayer.height);
    rlPlayer.rWorker.sendQuery('loadFromData', rlPlayer.reqId, url, rlPlayer.width, rlPlayer.height);
  }

  function destroyPlayer(el) {
    if (!el.rlPlayer) return;
    var rlPlayer = el.rlPlayer;
    delete rlottie.players[rlPlayer.reqId];
    delete rlPlayer;
    setupMainLoop();
  }

  function render(rlPlayer, checkViewport) {
    if (!rlPlayer.canvas ||
        rlPlayer.canvas.width == 0 ||
        rlPlayer.canvas.height == 0) {
      return false;
    }
    if (!rlPlayer.forceRender) {
      var focused = window.isFocused ? isFocused() : document.hasFocus();
      if (!focused ||
          rlPlayer.paused ||
          !rlPlayer.frameCount) {
        return false;
      }
      var isInViewport = rlPlayer.isInViewport;
      if (isInViewport === undefined || checkViewport) {
        var rect = rlPlayer.el.getBoundingClientRect();
        if (rect.bottom < 0 ||
            rect.right < 0 ||
            rect.top > (window.innerHeight || document.documentElement.clientHeight) ||
            rect.left > (window.innerWidth || document.documentElement.clientWidth)) {
          isInViewport = false;
        } else {
          isInViewport = true;
        }
        rlPlayer.isInViewport = isInViewport;
      }
      if (!isInViewport) {
        return false;
      }
    }
    var frame = rlPlayer.frameQueue.shift();
    if (frame !== null) {
      doRender(rlPlayer, frame);
      var nextFrameNo = rlPlayer.nextFrameNo;
      if (nextFrameNo !== false) {
        rlPlayer.nextFrameNo = false;
        requestFrame(rlPlayer.reqId, nextFrameNo);
      }
    }

    return true;
  }

  function doRender(rlPlayer, frame) {
    rlPlayer.forceRender = false;
    rlPlayer.imageData.data.set(frame);
    rlPlayer.context.putImageData(rlPlayer.imageData, 0, 0);
    var now = +(new Date());
    if (rlPlayer.frameThen) {
      rlPlayer.times.push(now - rlPlayer.frameThen)
    }
    rlPlayer.frameThen = now - (now % rlPlayer.frameInterval);
    if (rlPlayer.thumb) {
      rlPlayer.el.removeChild(rlPlayer.thumb);
      delete rlPlayer.thumb;
    }
  }

  function requestFrame(reqId, frameNo) {
    var rlPlayer = rlottie.players[reqId];
    var frame = rlPlayer.frames[frameNo];
    if (frame) {
      onFrame(reqId, frameNo, frame)
    } else if (isSafari) {
      rlPlayer.rWorker.sendQuery('renderFrame', reqId, frameNo);
    } else {
      if(!rlPlayer.clamped.length) { // fix detached
        rlPlayer.clamped = new Uint8ClampedArray(rlPlayer.width * rlPlayer.height * 4);
      }
      rlPlayer.rWorker.sendQuery('renderFrame', reqId, frameNo, rlPlayer.clamped);
    }
  }

  function onFrame(reqId, frameNo, frame) {
    var rlPlayer = rlottie.players[reqId];
    if (rlPlayer.options.cachingModulo &&
        !rlPlayer.frames[frameNo] &&
        (!frameNo || ((reqId + frameNo) % rlPlayer.options.cachingModulo))) {
      rlPlayer.frames[frameNo] = new Uint8ClampedArray(frame)
    }
    rlPlayer.frameQueue.push(frame);
    var nextFrameNo = ++frameNo;
    if (nextFrameNo >= rlPlayer.frameCount) {
      if (!rlPlayer.options.playOnce) {
        nextFrameNo = 0;
        if (rlPlayer.times.length) {
          // var avg = 0;
          // for (var i = 0; i < rlPlayer.times.length; i++) {
          //   avg += rlPlayer.times[i] / rlPlayer.times.length;
          // }
          // console.log('avg time: ' +  avg + ', ' + rlPlayer.fps);
          rlPlayer.times = [];
        }
      } else {
        rlPlayer.paused = true;
      }
    }
    if (rlPlayer.frameQueue.needsMore()) {
      requestFrame(reqId, nextFrameNo)
    } else {
      rlPlayer.nextFrameNo = nextFrameNo;
    }
  }

  function onLoaded(reqId, frameCount, fps) {
    var rlPlayer = rlottie.players[reqId];

    rlPlayer.canvas = document.createElement('canvas');
    rlPlayer.canvas.width = rlPlayer.width;
    rlPlayer.canvas.height = rlPlayer.height;
    rlPlayer.el.appendChild(rlPlayer.canvas);
    rlPlayer.context = rlPlayer.canvas.getContext('2d');

    rlPlayer.fps = fps;
    rlPlayer.frameInterval = 1000 / rlPlayer.fps;
    rlPlayer.frameThen = Date.now();
    rlPlayer.frameCount = frameCount;
    rlPlayer.forceRender = true;
    rlPlayer.frameQueue = new FrameQueue(fps / 4);
    setupMainLoop();
    requestFrame(reqId, 0);
  }

  rlottie.init = function(el, options) {
    if (!rlottie.isSupported) {
      return false;
    }
    initApi(function() {
      initPlayer(el, options);
    });
  }

  rlottie.destroy = function(el) {
    destroyPlayer(el);
  }

  rlottie.destroyWorkers = function() {
    destroyWorkers();
  }

  return rlottie;
}());



function QueryableWorker(url, defaultListener, onError) {
  var instance = this;
  var worker = new Worker(url);
  var listeners = {};

  this.defaultListener = defaultListener || function() {};

  if (onError) {worker.onerror = onError;}

  this.postMessage = function(message) {
    worker.postMessage(message);
  }

  this.terminate = function() {
    worker.terminate();
  }

  this.addListener = function(name, listener) {
    listeners[name] = listener;
  }

  this.removeListener = function(name) {
    delete listeners[name];
  }

  /*
    This functions takes at least one argument, the method name we want to query.
    Then we can pass in the arguments that the method needs.
  */
  this.sendQuery = function(queryMethod) {
    if (arguments.length < 1) {
      throw new TypeError('QueryableWorker.sendQuery takes at least one argument');
      return;
    }
    var queryMethod = arguments[0];
    var args = Array.prototype.slice.call(arguments, 1);
    if (RLottie.isSafari) {
      worker.postMessage({
        'queryMethod': queryMethod,
        'queryMethodArguments': args
      });
    } else {
      var transfer = [];
      for(var i = 0; i < args.length; i++) {
        if(args[i] instanceof ArrayBuffer) {
          transfer.push(args[i]);
        }

        if(args[i].buffer && args[i].buffer instanceof ArrayBuffer) {
          transfer.push(args[i].buffer);
        }
      }

      worker.postMessage({
        'queryMethod': queryMethod,
        'queryMethodArguments': args
      }, transfer);
    }
  }

  worker.onmessage = function(event) {
    if (event.data instanceof Object &&
      event.data.hasOwnProperty('queryMethodListener') &&
      event.data.hasOwnProperty('queryMethodArguments')) {
      listeners[event.data.queryMethodListener].apply(instance, event.data.queryMethodArguments);
    } else {
      this.defaultListener.call(instance, event.data);
    }
  }
}

function FrameQueue(maxLength) {
  this.queue = [];
  this.maxLength = maxLength;
}

FrameQueue.prototype.needsMore = function frameQueueNeedsMore() {
  return this.queue.length < this.maxLength;
}

FrameQueue.prototype.empty = function frameQueueEmpty() {
  return !this.queue.length;
}

FrameQueue.prototype.notEmpty = function frameQueueEmpty() {
  return this.queue.length > 0;
}

FrameQueue.prototype.push = function frameQueuePush(element) {
  return this.queue.push(element);
}

FrameQueue.prototype.shift = function frameQueueShift() {
  return this.queue.length ? this.queue.shift() : null;
}