(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g=(g.d3||(g.d3 = {}));g=(g.layout||(g.layout = {}));g.cloud = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
  // Word cloud layout by Jason Davies, https://www.jasondavies.com/wordcloud/
  // Algorithm due to Jonathan Feinberg, https://s3.amazonaws.com/static.mrfeinberg.com/bv_ch03.pdf
  
  const dispatch = require("d3-dispatch").dispatch;
  
  const RADIANS = Math.PI / 180;
  
  const SPIRALS = {
    archimedean: archimedeanSpiral,
    rectangular: rectangularSpiral
  };
  
  const cw = 1 << 11 >> 5;
  const ch = 1 << 11;
  
  module.exports = function() {
    var size = [256, 256],
        text = cloudText,
        font = cloudFont,
        fontSize = cloudFontSize,
        fontStyle = cloudFontNormal,
        fontWeight = cloudFontNormal,
        rotate = cloudRotate,
        padding = cloudPadding,
        spiral = archimedeanSpiral,
        words = [],
        timeInterval = Infinity,
        event = dispatch("word", "end"),
        timer = null,
        random = Math.random,
        cloud = {},
        canvas = cloudCanvas;
  
    cloud.canvas = function(_) {
      return arguments.length ? (canvas = functor(_), cloud) : canvas;
    };
  
    cloud.start = function() {
      var contextAndRatio = getContext(canvas()),
          board = zeroArray((size[0] >> 5) * size[1]),
          bounds = null,
          n = words.length,
          i = -1,
          tags = [],
          data = words.map(function(d, i) {
            d.text = text.call(this, d, i);
            d.font = font.call(this, d, i);
            d.style = fontStyle.call(this, d, i);
            d.weight = fontWeight.call(this, d, i);
            d.rotate = rotate.call(this, d, i);
            d.size = ~~fontSize.call(this, d, i);
            d.padding = padding.call(this, d, i);
            return d;
          }).sort(function(a, b) { return b.size - a.size; });
  
      if (timer) clearInterval(timer);
      timer = setInterval(step, 0);
      step();
  
      return cloud;
  
      function step() {
        var start = Date.now();
        while (Date.now() - start < timeInterval && ++i < n && timer) {
          var d = data[i];
          d.x = (size[0] * (random() + .5)) >> 1;
          d.y = (size[1] * (random() + .5)) >> 1;
          cloudSprite(contextAndRatio, d, data, i);
          if (d.hasText && place(board, d, bounds)) {
            tags.push(d);
            event.call("word", cloud, d);
            if (bounds) cloudBounds(bounds, d);
            else bounds = [{x: d.x + d.x0, y: d.y + d.y0}, {x: d.x + d.x1, y: d.y + d.y1}];
            // Temporary hack
            d.x -= size[0] >> 1;
            d.y -= size[1] >> 1;
          }
        }
        if (i >= n) {
          cloud.stop();
          event.call("end", cloud, tags, bounds);
        }
      }
    }
  
    cloud.stop = function() {
      if (timer) {
        clearInterval(timer);
        timer = null;
      }
      for (const d of words) {
        delete d.sprite;
      }
      return cloud;
    };
  
    function getContext(canvas) {
      const context = canvas.getContext("2d", {willReadFrequently: true});
  
      canvas.width = canvas.height = 1;
      const ratio = Math.sqrt(context.getImageData(0, 0, 1, 1).data.length >> 2);
      canvas.width = (cw << 5) / ratio;
      canvas.height = ch / ratio;
  
      context.fillStyle = context.strokeStyle = "red";
  
      return {context, ratio};
    }
  
    function place(board, tag, bounds) {
      var perimeter = [{x: 0, y: 0}, {x: size[0], y: size[1]}],
          startX = tag.x,
          startY = tag.y,
          maxDelta = Math.sqrt(size[0] * size[0] + size[1] * size[1]),
          s = spiral(size),
          dt = random() < .5 ? 1 : -1,
          t = -dt,
          dxdy,
          dx,
          dy;
  
      while (dxdy = s(t += dt)) {
        dx = ~~dxdy[0];
        dy = ~~dxdy[1];
  
        if (Math.min(Math.abs(dx), Math.abs(dy)) >= maxDelta) break;
  
        tag.x = startX + dx;
        tag.y = startY + dy;
  
        if (tag.x + tag.x0 < 0 || tag.y + tag.y0 < 0 ||
            tag.x + tag.x1 > size[0] || tag.y + tag.y1 > size[1]) continue;
        // TODO only check for collisions within current bounds.
        if (!bounds || collideRects(tag, bounds)) {
          if (!cloudCollide(tag, board, size[0])) {
            var sprite = tag.sprite,
                w = tag.width >> 5,
                sw = size[0] >> 5,
                lx = tag.x - (w << 4),
                sx = lx & 0x7f,
                msx = 32 - sx,
                h = tag.y1 - tag.y0,
                x = (tag.y + tag.y0) * sw + (lx >> 5),
                last;
            for (var j = 0; j < h; j++) {
              last = 0;
              for (var i = 0; i <= w; i++) {
                board[x + i] |= (last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0);
              }
              x += sw;
            }
            return true;
          }
        }
      }
      return false;
    }
  
    cloud.timeInterval = function(_) {
      return arguments.length ? (timeInterval = _ == null ? Infinity : _, cloud) : timeInterval;
    };
  
    cloud.words = function(_) {
      return arguments.length ? (words = _, cloud) : words;
    };
  
    cloud.size = function(_) {
      return arguments.length ? (size = [+_[0], +_[1]], cloud) : size;
    };
  
    cloud.font = function(_) {
      return arguments.length ? (font = functor(_), cloud) : font;
    };
  
    cloud.fontStyle = function(_) {
      return arguments.length ? (fontStyle = functor(_), cloud) : fontStyle;
    };
  
    cloud.fontWeight = function(_) {
      return arguments.length ? (fontWeight = functor(_), cloud) : fontWeight;
    };
  
    cloud.rotate = function(_) {
      return arguments.length ? (rotate = functor(_), cloud) : rotate;
    };
  
    cloud.text = function(_) {
      return arguments.length ? (text = functor(_), cloud) : text;
    };
  
    cloud.spiral = function(_) {
      return arguments.length ? (spiral = SPIRALS[_] || _, cloud) : spiral;
    };
  
    cloud.fontSize = function(_) {
      return arguments.length ? (fontSize = functor(_), cloud) : fontSize;
    };
  
    cloud.padding = function(_) {
      return arguments.length ? (padding = functor(_), cloud) : padding;
    };
  
    cloud.random = function(_) {
      return arguments.length ? (random = _, cloud) : random;
    };
  
    cloud.on = function() {
      var value = event.on.apply(event, arguments);
      return value === event ? cloud : value;
    };
  
    return cloud;
  };
  
  function cloudText(d) {
    return d.text;
  }
  
  function cloudFont() {
    return "serif";
  }
  
  function cloudFontNormal() {
    return "normal";
  }
  
  function cloudFontSize(d) {
    return Math.sqrt(d.value);
  }
  
  function cloudRotate() {
    return (~~(random() * 6) - 3) * 30;
  }
  
  function cloudPadding() {
    return 1;
  }
  
  // Fetches a monochrome sprite bitmap for the specified text.
  // Load in batches for speed.
  function cloudSprite(contextAndRatio, d, data, di) {
    if (d.sprite) return;
    var c = contextAndRatio.context,
        ratio = contextAndRatio.ratio;
  
    c.clearRect(0, 0, (cw << 5) / ratio, ch / ratio);
    var x = 0,
        y = 0,
        maxh = 0,
        n = data.length;
    --di;
    while (++di < n) {
      d = data[di];
      c.save();
      c.font = d.style + " " + d.weight + " " + ~~((d.size + 1) / ratio) + "px " + d.font;
      const metrics = c.measureText(d.text);
      const anchor = -Math.floor(metrics.width / 2);
      let w = (metrics.width + 1) * ratio;
      let h = d.size << 1;
      if (d.rotate) {
        var sr = Math.sin(d.rotate * RADIANS),
            cr = Math.cos(d.rotate * RADIANS),
            wcr = w * cr,
            wsr = w * sr,
            hcr = h * cr,
            hsr = h * sr;
        w = (Math.max(Math.abs(wcr + hsr), Math.abs(wcr - hsr)) + 0x1f) >> 5 << 5;
        h = ~~Math.max(Math.abs(wsr + hcr), Math.abs(wsr - hcr));
      } else {
        w = (w + 0x1f) >> 5 << 5;
      }
      if (h > maxh) maxh = h;
      if (x + w >= (cw << 5)) {
        x = 0;
        y += maxh;
        maxh = 0;
      }
      if (y + h >= ch) break;
      c.translate((x + (w >> 1)) / ratio, (y + (h >> 1)) / ratio);
      if (d.rotate) c.rotate(d.rotate * RADIANS);
      c.fillText(d.text, anchor, 0);
      if (d.padding) c.lineWidth = 2 * d.padding, c.strokeText(d.text, anchor, 0);
      c.restore();
      d.width = w;
      d.height = h;
      d.xoff = x;
      d.yoff = y;
      d.x1 = w >> 1;
      d.y1 = h >> 1;
      d.x0 = -d.x1;
      d.y0 = -d.y1;
      d.hasText = true;
      x += w;
    }
    var pixels = c.getImageData(0, 0, (cw << 5) / ratio, ch / ratio).data,
        sprite = [];
    while (--di >= 0) {
      d = data[di];
      if (!d.hasText) continue;
      var w = d.width,
          w32 = w >> 5,
          h = d.y1 - d.y0;
      // Zero the buffer
      for (var i = 0; i < h * w32; i++) sprite[i] = 0;
      x = d.xoff;
      if (x == null) return;
      y = d.yoff;
      var seen = 0,
          seenRow = -1;
      for (var j = 0; j < h; j++) {
        for (var i = 0; i < w; i++) {
          var k = w32 * j + (i >> 5),
              m = pixels[((y + j) * (cw << 5) + (x + i)) << 2] ? 1 << (31 - (i % 32)) : 0;
          sprite[k] |= m;
          seen |= m;
        }
        if (seen) seenRow = j;
        else {
          d.y0++;
          h--;
          j--;
          y++;
        }
      }
      d.y1 = d.y0 + seenRow;
      d.sprite = sprite.slice(0, (d.y1 - d.y0) * w32);
    }
  }
  
  // Use mask-based collision detection.
  function cloudCollide(tag, board, sw) {
    sw >>= 5;
    var sprite = tag.sprite,
        w = tag.width >> 5,
        lx = tag.x - (w << 4),
        sx = lx & 0x7f,
        msx = 32 - sx,
        h = tag.y1 - tag.y0,
        x = (tag.y + tag.y0) * sw + (lx >> 5),
        last;
    for (var j = 0; j < h; j++) {
      last = 0;
      for (var i = 0; i <= w; i++) {
        if (((last << msx) | (i < w ? (last = sprite[j * w + i]) >>> sx : 0))
            & board[x + i]) return true;
      }
      x += sw;
    }
    return false;
  }
  
  function cloudBounds(bounds, d) {
    var b0 = bounds[0],
        b1 = bounds[1];
    if (d.x + d.x0 < b0.x) b0.x = d.x + d.x0;
    if (d.y + d.y0 < b0.y) b0.y = d.y + d.y0;
    if (d.x + d.x1 > b1.x) b1.x = d.x + d.x1;
    if (d.y + d.y1 > b1.y) b1.y = d.y + d.y1;
  }
  
  function collideRects(a, b) {
    return a.x + a.x1 > b[0].x && a.x + a.x0 < b[1].x && a.y + a.y1 > b[0].y && a.y + a.y0 < b[1].y;
  }
  
  function archimedeanSpiral(size) {
    var e = size[0] / size[1];
    return function(t) {
      return [e * (t *= .1) * Math.cos(t), t * Math.sin(t)];
    };
  }
  
  function rectangularSpiral(size) {
    var dy = 4,
        dx = dy * size[0] / size[1],
        x = 0,
        y = 0;
    return function(t) {
      var sign = t < 0 ? -1 : 1;
      // See triangular numbers: T_n = n * (n + 1) / 2.
      switch ((Math.sqrt(1 + 4 * sign * t) - sign) & 3) {
        case 0:  x += dx; break;
        case 1:  y += dy; break;
        case 2:  x -= dx; break;
        default: y -= dy; break;
      }
      return [x, y];
    };
  }
  
  // TODO reuse arrays?
  function zeroArray(n) {
    var a = [],
        i = -1;
    while (++i < n) a[i] = 0;
    return a;
  }
  
  function cloudCanvas() {
    return document.createElement("canvas");
  }
  
  function functor(d) {
    return typeof d === "function" ? d : function() { return d; };
  }
  
  },{"d3-dispatch":2}],2:[function(require,module,exports){
  // https://d3js.org/d3-dispatch/ v1.0.6 Copyright 2019 Mike Bostock
  (function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
  typeof define === 'function' && define.amd ? define(['exports'], factory) :
  (global = global || self, factory(global.d3 = global.d3 || {}));
  }(this, function (exports) { 'use strict';
  
  var noop = {value: function() {}};
  
  function dispatch() {
    for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
      if (!(t = arguments[i] + "") || (t in _) || /[\s.]/.test(t)) throw new Error("illegal type: " + t);
      _[t] = [];
    }
    return new Dispatch(_);
  }
  
  function Dispatch(_) {
    this._ = _;
  }
  
  function parseTypenames(typenames, types) {
    return typenames.trim().split(/^|\s+/).map(function(t) {
      var name = "", i = t.indexOf(".");
      if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
      if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
      return {type: t, name: name};
    });
  }
  
  Dispatch.prototype = dispatch.prototype = {
    constructor: Dispatch,
    on: function(typename, callback) {
      var _ = this._,
          T = parseTypenames(typename + "", _),
          t,
          i = -1,
          n = T.length;
  
      // If no callback was specified, return the callback of the given type and name.
      if (arguments.length < 2) {
        while (++i < n) if ((t = (typename = T[i]).type) && (t = get(_[t], typename.name))) return t;
        return;
      }
  
      // If a type was specified, set the callback for the given type and name.
      // Otherwise, if a null callback was specified, remove callbacks of the given name.
      if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
      while (++i < n) {
        if (t = (typename = T[i]).type) _[t] = set(_[t], typename.name, callback);
        else if (callback == null) for (t in _) _[t] = set(_[t], typename.name, null);
      }
  
      return this;
    },
    copy: function() {
      var copy = {}, _ = this._;
      for (var t in _) copy[t] = _[t].slice();
      return new Dispatch(copy);
    },
    call: function(type, that) {
      if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) args[i] = arguments[i + 2];
      if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
      for (t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
    },
    apply: function(type, that, args) {
      if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);
      for (var t = this._[type], i = 0, n = t.length; i < n; ++i) t[i].value.apply(that, args);
    }
  };
  
  function get(type, name) {
    for (var i = 0, n = type.length, c; i < n; ++i) {
      if ((c = type[i]).name === name) {
        return c.value;
      }
    }
  }
  
  function set(type, name, callback) {
    for (var i = 0, n = type.length; i < n; ++i) {
      if (type[i].name === name) {
        type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
        break;
      }
    }
    if (callback != null) type.push({name: name, value: callback});
    return type;
  }
  
  exports.dispatch = dispatch;
  
  Object.defineProperty(exports, '__esModule', { value: true });
  
  }));
  
  },{}]},{},[1])(1)
  });