wordcloud2.js

https://blogs.msdn.microsoft.com/dotnet/2019/01/10/announcing-ml-net-0-9-machine-learning-for-net/

https://marketplace.visualstudio.com/items?itemName=MLNET.07

https://dotnet.microsoft.com/learn/machinelearning-ai/ml-dotnet-get-started-tutorial

https://docs.microsoft.com/en-us/dotnet/machine-learning/

https://github.com/dotnet/machinelearning

wordcloud2.js:

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/*!  * wordcloud2.js  * http://timdream.org/wordcloud2.js/  *https://github.com/timdream/wordcloud2.js/  * Copyright 2011 - 2013 Tim Chien  * Released under the MIT license  */   'use strict';   // setImmediate if (!window.setImmediate) {   window.setImmediate = (function setupSetImmediate() {     return window.msSetImmediate ||     window.webkitSetImmediate ||     window.mozSetImmediate ||     window.oSetImmediate ||     (function setupSetZeroTimeout() {       if (!window.postMessage || !window.addEventListener) {         return null;       }         var callbacks = [undefined];       var message = 'zero-timeout-message';         // Like setTimeout, but only takes a function argument.  There's       // no time argument (always zero) and no arguments (you have to       // use a closure).       var setZeroTimeout = function setZeroTimeout(callback) {         var id = callbacks.length;         callbacks.push(callback);         window.postMessage(message + id.toString(36), '*');           return id;       };         window.addEventListener('message', function setZeroTimeoutMessage(evt) {         // Skipping checking event source, retarded IE confused this window         // object with another in the presence of iframe         if (typeof evt.data !== 'string' ||             evt.data.substr(0, message.length) !== message/* ||             evt.source !== window */) {           return;         }           evt.stopImmediatePropagation();           var id = parseInt(evt.data.substr(message.length), 36);         if (!callbacks[id]) {           return;         }           callbacks[id]();         callbacks[id] = undefined;       }, true);         /* specify clearImmediate() here since we need the scope */       window.clearImmediate = function clearZeroTimeout(id) {         if (!callbacks[id]) {           return;         }           callbacks[id] = undefined;       };         return setZeroTimeout;     })() ||     // fallback     function setImmediateFallback(fn) {       window.setTimeout(fn, 0);     };   })(); }   if (!window.clearImmediate) {   window.clearImmediate = (function setupClearImmediate() {     return window.msClearImmediate ||     window.webkitClearImmediate ||     window.mozClearImmediate ||     window.oClearImmediate ||     // "clearZeroTimeout" is implement on the previous block ||     // fallback     function clearImmediateFallback(timer) {       window.clearTimeout(timer);     };   })(); }   (function(global) {     // Check if WordCloud can run on this browser   var isSupported = (function isSupported() {     var canvas = document.createElement('canvas');     if (!canvas || !canvas.getContext) {       return false;     }       var ctx = canvas.getContext('2d');     if (!ctx.getImageData) {       return false;     }     if (!ctx.fillText) {       return false;     }       if (!Array.prototype.some) {       return false;     }     if (!Array.prototype.push) {       return false;     }       return true;   }());     // Find out if the browser impose minium font size by   // drawing small texts on a canvas and measure it's width.   var miniumFontSize = (function getMiniumFontSize() {     if (!isSupported) {       return;     }       var ctx = document.createElement('canvas').getContext('2d');       // start from 20     var size = 20;       // two sizes to measure     var hanWidth, mWidth;       while (size) {       ctx.font = size.toString(10) + 'px sans-serif';       if ((ctx.measureText('\uFF37').width === hanWidth) &&           (ctx.measureText('m').width) === mWidth) {         return (size + 1);       }         hanWidth = ctx.measureText('\uFF37').width;       mWidth = ctx.measureText('m').width;         size--;     }       return 0;   })();     // Based on http://jsfromhell.com/array/shuffle   var shuffleArray = function shuffleArray(arr) {     for (var j, x, i = arr.length; i;       j = Math.floor(Math.random() * i),       x = arr[--i], arr[i] = arr[j],       arr[j] = x) {}     return arr;   };     var WordCloud = function WordCloud(elements, options) {     if (!isSupported) {       return;     }       if (!Array.isArray(elements)) {       elements = [elements];     }       elements.forEach(function(el, i) {       if (typeof el === 'string') {         elements[i] = document.getElementById(el);         if (!elements[i]) {           throw 'The element id specified is not found.';         }       } else if (!el.tagName && !el.appendChild) {         throw 'You must pass valid HTML elements, or ID of the element.';       }     });       /* Default values to be overwritten by options object */     var settings = {       list: [],       fontFamily: '"Trebuchet MS", "Heiti TC", "微軟正黑體", ' +                   '"Arial Unicode MS", "Droid Fallback Sans", sans-serif',       fontWeight: 'normal',       color: 'random-dark',       minSize: 0, // 0 to disable       weightFactor: 1,       clearCanvas: true,       backgroundColor: '#fff',  // opaque white = rgba(255, 255, 255, 1)         gridSize: 8,       origin: null,         drawMask: false,       maskColor: 'rgba(255,0,0,0.3)',       maskGapWidth: 0.3,         wait: 0,       abortThreshold: 0, // disabled       abort: function noop() {},         minRotation: - Math.PI / 2,       maxRotation: Math.PI / 2,         shuffle: true,       rotateRatio: 0.1,         shape: 'circle',       ellipticity: 0.65,         hover: null,       click: null     };       if (options) {       for (var key in options) {         if (key in settings) {           settings[key] = options[key];         }       }     }       /* Convert weightFactor into a function */     if (typeof settings.weightFactor !== 'function') {       var factor = settings.weightFactor;       settings.weightFactor = function weightFactor(pt) {         return pt * factor; //in px       };     }       /* Convert shape into a function */     if (typeof settings.shape !== 'function') {       switch (settings.shape) {         case 'circle':         /* falls through */         default:           // 'circle' is the default and a shortcut in the code loop.           settings.shape = 'circle';           break;           case 'cardioid':           settings.shape = function shapeCardioid(theta) {             return 1 - Math.sin(theta);           };           break;           /*           To work out an X-gon, one has to calculate "m",         where 1/(cos(2*PI/X)+m*sin(2*PI/X)) = 1/(cos(0)+m*sin(0))         http://www.wolframalpha.com/input/?i=1%2F%28cos%282*PI%2FX%29%2Bm*sin%28         2*PI%2FX%29%29+%3D+1%2F%28cos%280%29%2Bm*sin%280%29%29           Copy the solution into polar equation r = 1/(cos(t') + m*sin(t'))         where t' equals to mod(t, 2PI/X);           */           case 'diamond':         case 'square':           // http://www.wolframalpha.com/input/?i=plot+r+%3D+1%2F%28cos%28mod+           // %28t%2C+PI%2F2%29%29%2Bsin%28mod+%28t%2C+PI%2F2%29%29%29%2C+t+%3D           // +0+..+2*PI           settings.shape = function shapeSquare(theta) {             var thetaPrime = theta % (2 * Math.PI / 4);             return 1 / (Math.cos(thetaPrime) + Math.sin(thetaPrime));           };           break;           case 'triangle-forward':           // http://www.wolframalpha.com/input/?i=plot+r+%3D+1%2F%28cos%28mod+           // %28t%2C+2*PI%2F3%29%29%2Bsqrt%283%29sin%28mod+%28t%2C+2*PI%2F3%29           // %29%29%2C+t+%3D+0+..+2*PI           settings.shape = function shapeTriangle(theta) {             var thetaPrime = theta % (2 * Math.PI / 3);             return 1 / (Math.cos(thetaPrime) +                         Math.sqrt(3) * Math.sin(thetaPrime));           };           break;           case 'triangle':         case 'triangle-upright':           settings.shape = function shapeTriangle(theta) {             var thetaPrime = (theta + Math.PI * 3 / 2) % (2 * Math.PI / 3);             return 1 / (Math.cos(thetaPrime) +                         Math.sqrt(3) * Math.sin(thetaPrime));           };           break;           case 'pentagon':           settings.shape = function shapePentagon(theta) {             var thetaPrime = (theta + 0.955) % (2 * Math.PI / 5);             return 1 / (Math.cos(thetaPrime) +                         0.726543 * Math.sin(thetaPrime));           };           break;           case 'star':           settings.shape = function shapeStar(theta) {             var thetaPrime = (theta + 0.955) % (2 * Math.PI / 10);             if ((theta + 0.955) % (2 * Math.PI / 5) - (2 * Math.PI / 10) >= 0) {               return 1 / (Math.cos((2 * Math.PI / 10) - thetaPrime) +                           3.07768 * Math.sin((2 * Math.PI / 10) - thetaPrime));             } else {               return 1 / (Math.cos(thetaPrime) +                           3.07768 * Math.sin(thetaPrime));             }           };           break;       }     }       /* Make sure gridSize is a whole number and is not smaller than 4px */     settings.gridSize = Math.max(Math.floor(settings.gridSize), 4);       /* shorthand */     var g = settings.gridSize;     var maskRectWidth = g - settings.maskGapWidth;       /* normalize rotation settings */     var rotationRange = Math.abs(settings.maxRotation - settings.minRotation);     var minRotation = Math.min(settings.maxRotation, settings.minRotation);       /* information/object available to all functions, set when start() */     var grid, // 2d array containing filling information       ngx, ngy, // width and height of the grid       center, // position of the center of the cloud       maxRadius;       /* timestamp for measuring each putWord() action */     var escapeTime;       /* function for getting the color of the text */     var getTextColor;     switch (settings.color) {       case 'random-dark':         getTextColor = function getRandomDarkColor() {           return 'rgb(' +             Math.floor(Math.random() * 128).toString(10) + ',' +             Math.floor(Math.random() * 128).toString(10) + ',' +             Math.floor(Math.random() * 128).toString(10) + ')';         };         break;         case 'random-light':         getTextColor = function getRandomLightColor() {           return 'rgb(' +             Math.floor(Math.random() * 128 + 128).toString(10) + ',' +             Math.floor(Math.random() * 128 + 128).toString(10) + ',' +             Math.floor(Math.random() * 128 + 128).toString(10) + ')';         };         break;         default:         if (typeof settings.color === 'function') {           getTextColor = settings.color;         }         break;     }       /* Interactive */     var interactive = false;     var infoGrid = [];     var hovered;       var getInfoGridFromMouseEvent = function getInfoGridFromMouseEvent(evt) {       var canvas = evt.currentTarget;       var rect = canvas.getBoundingClientRect();       var eventX = evt.clientX - rect.left;       var eventY = evt.clientY - rect.top;         var x = Math.floor(eventX * ((canvas.width / rect.width) || 1) / g);       var y = Math.floor(eventY * ((canvas.height / rect.height) || 1) / g);         return infoGrid[x][y];     };       var wordcloudhover = function wordcloudhover(evt) {       var info = getInfoGridFromMouseEvent(evt);         if (hovered === info) {         return;       }         hovered = info;       if (!info) {         settings.hover(undefined, undefined, evt);           return;       }         settings.hover(info.item, info.dimension, evt);       };       var wordcloudclick = function wordcloudclick(evt) {       var info = getInfoGridFromMouseEvent(evt);       if (!info) {         return;       }         settings.click(info.item, info.dimension, evt);     };       /* Get points on the grid for a given radius away from the center */     var pointsAtRadius = [];     var getPointsAtRadius = function getPointsAtRadius(radius) {       if (pointsAtRadius[radius]) {         return pointsAtRadius[radius];       }         // Look for these number of points on each radius       var T = radius * 8;         // Getting all the points at this radius       var t = T;       var points = [];         if (radius === 0) {         points.push([center[0], center[1], 0]);       }         while (t--) {         // distort the radius to put the cloud in shape         var rx = 1;         if (settings.shape !== 'circle') {           rx = settings.shape(t / T * 2 * Math.PI); // 0 to 1         }           // Push [x, y, t]; t is used solely for getTextColor()         points.push([           center[0] + radius * rx * Math.cos(-t / T * 2 * Math.PI),           center[1] + radius * rx * Math.sin(-t / T * 2 * Math.PI) *             settings.ellipticity,           t / T * 2 * Math.PI]);       }         pointsAtRadius[radius] = points;       return points;     };       /* Return true if we had spent too much time */     var exceedTime = function exceedTime() {       return ((settings.abortThreshold > 0) &&         ((new Date()).getTime() - escapeTime > settings.abortThreshold));     };       /* Get the deg of rotation according to settings, and luck. */     var getRotateDeg = function getRotateDeg() {       if (settings.rotateRatio === 0) {         return 0;       }         if (Math.random() > settings.rotateRatio) {         return 0;       }         if (rotationRange === 0) {         return minRotation;       }         return minRotation + Math.random() * rotationRange;     };       var getTextInfo = function getTextInfo(word, weight, rotateDeg) {       // calculate the acutal font size       // fontSize === 0 means weightFactor function wants the text skipped,       // and size < minSize means we cannot draw the text.       var debug = false;       var fontSize = settings.weightFactor(weight);       if (fontSize <= settings.minSize) {         return false;       }         // Scale factor here is to make sure fillText is not limited by       // the minium font size set by browser.       // It will always be 1 or 2n.       var mu = 1;       if (fontSize < miniumFontSize) {         mu = (function calculateScaleFactor() {           var mu = 2;           while (mu * fontSize < miniumFontSize) {             mu += 2;           }           return mu;         })();       }         var fcanvas = document.createElement('canvas');       var fctx = fcanvas.getContext('2d', { willReadFrequently: true });         fctx.font = settings.fontWeight + ' ' +         (fontSize * mu).toString(10) + 'px ' + settings.fontFamily;         // Estimate the dimension of the text with measureText().       var fw = fctx.measureText(word).width / mu;       var fh = Math.max(fontSize * mu,                         fctx.measureText('m').width,                         fctx.measureText('\uFF37').width) / mu;         // Create a boundary box that is larger than our estimates,       // so text don't get cut of (it sill might)       var boxWidth = fw + fh * 2;       var boxHeight = fh * 3;       var fgw = Math.ceil(boxWidth / g);       var fgh = Math.ceil(boxHeight / g);       boxWidth = fgw * g;       boxHeight = fgh * g;         // Calculate the proper offsets to make the text centered at       // the preferred position.         // This is simply half of the width.       var fillTextOffsetX = - fw / 2;       // Instead of moving the box to the exact middle of the preferred       // position, for Y-offset we move 0.4 instead, so Latin alphabets look       // vertical centered.       var fillTextOffsetY = - fh * 0.4;         // Calculate the actual dimension of the canvas, considering the rotation.       var cgh = Math.ceil((boxWidth * Math.abs(Math.sin(rotateDeg)) +                            boxHeight * Math.abs(Math.cos(rotateDeg))) / g);       var cgw = Math.ceil((boxWidth * Math.abs(Math.cos(rotateDeg)) +                            boxHeight * Math.abs(Math.sin(rotateDeg))) / g);       var width = cgw * g;       var height = cgh * g;         fcanvas.setAttribute('width', width);       fcanvas.setAttribute('height', height);         if (debug) {         // Attach fcanvas to the DOM         document.body.appendChild(fcanvas);         // Save it's state so that we could restore and draw the grid correctly.         fctx.save();       }         // Scale the canvas with |mu|.       fctx.scale(1 / mu, 1 / mu);       fctx.translate(width * mu / 2, height * mu / 2);       fctx.rotate(- rotateDeg);         // Once the width/height is set, ctx info will be reset.       // Set it again here.       fctx.font = settings.fontWeight + ' ' +         (fontSize * mu).toString(10) + 'px ' + settings.fontFamily;         // Fill the text into the fcanvas.       // XXX: We cannot because textBaseline = 'top' here because       // Firefox and Chrome uses different default line-height for canvas.       // Please read https://bugzil.la/737852#c6.       // Here, we use textBaseline = 'middle' and draw the text at exactly       // 0.5 * fontSize lower.       fctx.fillStyle = '#000';       fctx.textBaseline = 'middle';       fctx.fillText(word, fillTextOffsetX * mu,                     (fillTextOffsetY + fontSize * 0.5) * mu);         // Get the pixels of the text       var imageData = fctx.getImageData(0, 0, width, height).data;         if (exceedTime()) {         return false;       }         if (debug) {         // Draw the box of the original estimation         fctx.strokeRect(fillTextOffsetX * mu,                         fillTextOffsetY, fw * mu, fh * mu);         fctx.restore();       }         // Read the pixels and save the information to the occupied array       var occupied = [];       var gx = cgw, gy, x, y;       var bounds = [cgh / 2, cgw / 2, cgh / 2, cgw / 2];       while (gx--) {         gy = cgh;         while (gy--) {           y = g;           singleGridLoop: {             while (y--) {               x = g;               while (x--) {                 if (imageData[((gy * g + y) * width +                                (gx * g + x)) * 4 + 3]) {                   occupied.push([gx, gy]);                     if (gx < bounds[3]) {                     bounds[3] = gx;                   }                   if (gx > bounds[1]) {                     bounds[1] = gx;                   }                   if (gy < bounds[0]) {                     bounds[0] = gy;                   }                   if (gy > bounds[2]) {                     bounds[2] = gy;                   }                     if (debug) {                     fctx.fillStyle = 'rgba(255, 0, 0, 0.5)';                     fctx.fillRect(gx * g, gy * g, g - 0.5, g - 0.5);                   }                   break singleGridLoop;                 }               }             }             if (debug) {               fctx.fillStyle = 'rgba(0, 0, 255, 0.5)';               fctx.fillRect(gx * g, gy * g, g - 0.5, g - 0.5);             }           }         }       }         if (debug) {         fctx.fillStyle = 'rgba(0, 255, 0, 0.5)';         fctx.fillRect(bounds[3] * g,                       bounds[0] * g,                       (bounds[1] - bounds[3] + 1) * g,                       (bounds[2] - bounds[0] + 1) * g);       }         // Return information needed to create the text on the real canvas       return {         mu: mu,         occupied: occupied,         bounds: bounds,         gw: cgw,         gh: cgh,         fillTextOffsetX: fillTextOffsetX,         fillTextOffsetY: fillTextOffsetY,         fillTextWidth: fw,         fillTextHeight: fh,         fontSize: fontSize       };     };       /* Determine if there is room available in the given dimension */     var canFitText = function canFitText(gx, gy, gw, gh, occupied) {       // Go through the occupied points,       // return false if the space is not available.       var i = occupied.length;       while (i--) {         var px = gx + occupied[i][0];         var py = gy + occupied[i][1];           if (px >= ngx || py >= ngy || px < 0 || py < 0 || !grid[px][py]) {           return false;         }       }       return true;     };       /* Actually draw the text on the grid */     var drawText = function drawText(gx, gy, info, word, weight,                                      distance, theta, rotateDeg, attributes) {         var fontSize = info.fontSize;       var color;       if (getTextColor) {         color = getTextColor(word, weight, fontSize, distance, theta);       } else {         color = settings.color;       }         var dimension;       var bounds = info.bounds;       dimension = {         x: (gx + bounds[3]) * g,         y: (gy + bounds[0]) * g,         w: (bounds[1] - bounds[3] + 1) * g,         h: (bounds[2] - bounds[0] + 1) * g       };         elements.forEach(function(el) {         if (el.getContext) {           var ctx = el.getContext('2d');           var mu = info.mu;             // Save the current state before messing it           ctx.save();           ctx.scale(1 / mu, 1 / mu);             ctx.font = settings.fontWeight + ' ' +                      (fontSize * mu).toString(10) + 'px ' + settings.fontFamily;           ctx.fillStyle = color;             // Translate the canvas position to the origin coordinate of where           // the text should be put.           ctx.translate((gx + info.gw / 2) * g * mu,                         (gy + info.gh / 2) * g * mu);             if (rotateDeg !== 0) {             ctx.rotate(- rotateDeg);           }             // Finally, fill the text.             // XXX: We cannot because textBaseline = 'top' here because           // Firefox and Chrome uses different default line-height for canvas.           // Please read https://bugzil.la/737852#c6.           // Here, we use textBaseline = 'middle' and draw the text at exactly           // 0.5 * fontSize lower.           ctx.textBaseline = 'middle';           ctx.fillText(word, info.fillTextOffsetX * mu,                              (info.fillTextOffsetY + fontSize * 0.5) * mu);             // The below box is always matches how <span>s are positioned           /* ctx.strokeRect(info.fillTextOffsetX, info.fillTextOffsetY,             info.fillTextWidth, info.fillTextHeight); */             // Restore the state.           ctx.restore();         } else {           // drawText on DIV element           var span = document.createElement('span');           var transformRule = '';           transformRule = 'rotate(' + (- rotateDeg / Math.PI * 180) + 'deg) ';           if (info.mu !== 1) {             transformRule +=               'translateX(-' + (info.fillTextWidth / 4) + 'px) ' +               'scale(' + (1 / info.mu) + ')';           }           var styleRules = {             'position': 'absolute',             'display': 'block',             'font': settings.fontWeight + ' ' +                     (fontSize * info.mu) + 'px ' + settings.fontFamily,             'left': ((gx + info.gw / 2) * g + info.fillTextOffsetX) + 'px',             'top': ((gy + info.gh / 2) * g + info.fillTextOffsetY) + 'px',             'width': info.fillTextWidth + 'px',             'height': info.fillTextHeight + 'px',             'color': color,             'lineHeight': fontSize + 'px',             'whiteSpace': 'nowrap',             'transform': transformRule,             'webkitTransform': transformRule,             'msTransform': transformRule,             'transformOrigin': '50% 40%',             'webkitTransformOrigin': '50% 40%',             'msTransformOrigin': '50% 40%'           };           span.textContent = word;           for (var cssProp in styleRules) {             span.style[cssProp] = styleRules[cssProp];           }           if (attributes) {             for (var attribute in attributes) {               span.setAttribute(attribute, attributes[attribute]);             }           }           el.appendChild(span);         }       });     };       /* Help function to updateGrid */     var fillGridAt = function fillGridAt(x, y, drawMask, dimension, item) {       if (x >= ngx || y >= ngy || x < 0 || y < 0) {         return;       }         grid[x][y] = false;         if (drawMask) {         var ctx = elements[0].getContext('2d');         ctx.fillRect(x * g, y * g, maskRectWidth, maskRectWidth);       }         if (interactive) {         infoGrid[x][y] = { item: item, dimension: dimension };       }     };       /* Update the filling information of the given space with occupied points.        Draw the mask on the canvas if necessary. */     var updateGrid = function updateGrid(gx, gy, gw, gh, info, item) {       var occupied = info.occupied;       var drawMask = settings.drawMask;       var ctx;       if (drawMask) {         ctx = elements[0].getContext('2d');         ctx.save();         ctx.fillStyle = settings.maskColor;       }         var dimension;       if (interactive) {         var bounds = info.bounds;         dimension = {           x: (gx + bounds[3]) * g,           y: (gy + bounds[0]) * g,           w: (bounds[1] - bounds[3] + 1) * g,           h: (bounds[2] - bounds[0] + 1) * g         };       }         var i = occupied.length;       while (i--) {         fillGridAt(gx + occupied[i][0], gy + occupied[i][1],                    drawMask, dimension, item);       }         if (drawMask) {         ctx.restore();       }     };       /* putWord() processes each item on the list,        calculate it's size and determine it's position, and actually        put it on the canvas. */     var putWord = function putWord(item) {       var word, weight, attributes;       if (Array.isArray(item)) {         word = item[0];         weight = item[1];       } else {         word = item.word;         weight = item.weight;         attributes = item.attributes;       }       var rotateDeg = getRotateDeg();         // get info needed to put the text onto the canvas       var info = getTextInfo(word, weight, rotateDeg);         // not getting the info means we shouldn't be drawing this one.       if (!info) {         return false;       }         if (exceedTime()) {         return false;       }         // Skip the loop if we have already know the bounding box of       // word is larger than the canvas.       var bounds = info.bounds;       if ((bounds[1] - bounds[3] + 1) > ngx ||         (bounds[2] - bounds[0] + 1) > ngy) {         return false;       }         // Determine the position to put the text by       // start looking for the nearest points       var r = maxRadius + 1;         var tryToPutWordAtPoint = function(gxy) {         var gx = Math.floor(gxy[0] - info.gw / 2);         var gy = Math.floor(gxy[1] - info.gh / 2);         var gw = info.gw;         var gh = info.gh;           // If we cannot fit the text at this position, return false         // and go to the next position.         if (!canFitText(gx, gy, gw, gh, info.occupied)) {           return false;         }           // Actually put the text on the canvas         drawText(gx, gy, info, word, weight,                  (maxRadius - r), gxy[2], rotateDeg, attributes);           // Mark the spaces on the grid as filled         updateGrid(gx, gy, gw, gh, info, item);           // Return true so some() will stop and also return true.         return true;       };         while (r--) {         var points = getPointsAtRadius(maxRadius - r);           if (settings.shuffle) {           points = [].concat(points);           shuffleArray(points);         }           // Try to fit the words by looking at each point.         // array.some() will stop and return true         // when putWordAtPoint() returns true.         // If all the points returns false, array.some() returns false.         var drawn = points.some(tryToPutWordAtPoint);           if (drawn) {           // leave putWord() and return true           return true;         }       }       // we tried all distances but text won't fit, return false       return false;     };       /* Send DOM event to all elements. Will stop sending event and return        if the previous one is canceled (for cancelable events). */     var sendEvent = function sendEvent(type, cancelable, detail) {       if (cancelable) {         return !elements.some(function(el) {           var evt = document.createEvent('CustomEvent');           evt.initCustomEvent(type, true, cancelable, detail || {});           return !el.dispatchEvent(evt);         }, this);       } else {         elements.forEach(function(el) {           var evt = document.createEvent('CustomEvent');           evt.initCustomEvent(type, true, cancelable, detail || {});           el.dispatchEvent(evt);         }, this);       }     };       /* Start drawing on a canvas */     var start = function start() {       // For dimensions, clearCanvas etc.,       // we only care about the first element.       var canvas = elements[0];         if (canvas.getContext) {         ngx = Math.floor(canvas.width / g);         ngy = Math.floor(canvas.height / g);       } else {         var rect = canvas.getBoundingClientRect();         ngx = Math.floor(rect.width / g);         ngy = Math.floor(rect.height / g);       }         // Sending a wordcloudstart event which cause the previous loop to stop.       // Do nothing if the event is canceled.       if (!sendEvent('wordcloudstart', true)) {         return;       }         // Determine the center of the word cloud       center = (settings.origin) ?         [settings.origin[0]/g, settings.origin[1]/g] :         [ngx / 2, ngy / 2];         // Maxium radius to look for space       maxRadius = Math.floor(Math.sqrt(ngx * ngx + ngy * ngy));         /* Clear the canvas only if the clearCanvas is set,          if not, update the grid to the current canvas state */       grid = [];         var gx, gy, i;       if (!canvas.getContext || settings.clearCanvas) {         elements.forEach(function(el) {           if (el.getContext) {             var ctx = el.getContext('2d');             ctx.fillStyle = settings.backgroundColor;             ctx.clearRect(0, 0, ngx * (g + 1), ngy * (g + 1));             ctx.fillRect(0, 0, ngx * (g + 1), ngy * (g + 1));           } else {             el.textContent = '';             el.style.backgroundColor = settings.backgroundColor;           }         });           /* fill the grid with empty state */         gx = ngx;         while (gx--) {           grid[gx] = [];           gy = ngy;           while (gy--) {             grid[gx][gy] = true;           }         }       } else {         /* Determine bgPixel by creating            another canvas and fill the specified background color. */         var bctx = document.createElement('canvas').getContext('2d');           bctx.fillStyle = settings.backgroundColor;         bctx.fillRect(0, 0, 1, 1);         var bgPixel = bctx.getImageData(0, 0, 1, 1).data;           /* Read back the pixels of the canvas we got to tell which part of the            canvas is empty.            (no clearCanvas only works with a canvas, not divs) */         var imageData =           canvas.getContext('2d').getImageData(0, 0, ngx * g, ngy * g).data;           gx = ngx;         var x, y;         while (gx--) {           grid[gx] = [];           gy = ngy;           while (gy--) {             y = g;             singleGridLoop: while (y--) {               x = g;               while (x--) {                 i = 4;                 while (i--) {                   if (imageData[((gy * g + y) * ngx * g +                                  (gx * g + x)) * 4 + i] !== bgPixel[i]) {                     grid[gx][gy] = false;                     break singleGridLoop;                   }                 }               }             }             if (grid[gx][gy] !== false) {               grid[gx][gy] = true;             }           }         }           imageData = bctx = bgPixel = undefined;       }         // fill the infoGrid with empty state if we need it       if (settings.hover || settings.click) {           interactive = true;           /* fill the grid with empty state */         gx = ngx + 1;         while (gx--) {           infoGrid[gx] = [];         }           if (settings.hover) {           canvas.addEventListener('mousemove', wordcloudhover);         }           if (settings.click) {           canvas.addEventListener('click', wordcloudclick);         }           canvas.addEventListener('wordcloudstart', function stopInteraction() {           canvas.removeEventListener('wordcloudstart', stopInteraction);             canvas.removeEventListener('mousemove', wordcloudhover);           canvas.removeEventListener('click', wordcloudclick);           hovered = undefined;         });       }         i = 0;       var loopingFunction, stoppingFunction;       if (settings.wait !== 0) {         loopingFunction = window.setTimeout;         stoppingFunction = window.clearTimeout;       } else {         loopingFunction = window.setImmediate;         stoppingFunction = window.clearImmediate;       }         var addEventListener = function addEventListener(type, listener) {         elements.forEach(function(el) {           el.addEventListener(type, listener);         }, this);       };         var removeEventListener = function removeEventListener(type, listener) {         elements.forEach(function(el) {           el.removeEventListener(type, listener);         }, this);       };         var anotherWordCloudStart = function anotherWordCloudStart() {         removeEventListener('wordcloudstart', anotherWordCloudStart);         stoppingFunction(timer);       };         addEventListener('wordcloudstart', anotherWordCloudStart);         var timer = loopingFunction(function loop() {         if (i >= settings.list.length) {           stoppingFunction(timer);           sendEvent('wordcloudstop', false);           removeEventListener('wordcloudstart', anotherWordCloudStart);             return;         }         escapeTime = (new Date()).getTime();         var drawn = putWord(settings.list[i]);         var canceled = !sendEvent('wordclouddrawn', true, {           item: settings.list[i], drawn: drawn });         if (exceedTime() || canceled) {           stoppingFunction(timer);           settings.abort();           sendEvent('wordcloudabort', false);           sendEvent('wordcloudstop', false);           removeEventListener('wordcloudstart', anotherWordCloudStart);           return;         }         i++;         timer = loopingFunction(loop, settings.wait);       }, settings.wait);     };       // All set, start the drawing     start();   };     WordCloud.isSupported = isSupported;   WordCloud.miniumFontSize = miniumFontSize;     // Expose the library as an AMD module   if (typeof global.define === 'function' && global.define.amd) {     global.define('wordcloud', [], function() { return WordCloud; });   } else {     global.WordCloud = WordCloud;   }   })(window);

　　

html5:

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<!DOCTYPE html> <html> <head> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width,initial-scale=1">     <meta charset='utf-8'>     <title>wordcloud2</title>     <style>         #cloud { border-radius:3px;border:1px solid #d0d0d0; }         #cloud span { cursor: pointer; }     </style> </head> <body>     <div id='cloud' style="width:640px;height:450px;position:relative;"></div>     <div id="details" style="width:640px;text-align:center;line-height:2em;margin-top:0.5em"></div>     <script src='wordcloud2.js'></script>     <script> //https://github.com/timdream/wordcloud2.js/         var tags = [          ["c#", 601251],          ["java", 585413],          ["javascript", 557407],          ["php", 534590],          ["android", 466436],          ["jquery", 438303],          ["python", 274216],          ["c++", 269570],          ["html", 259946],          ["mysql", 226906],          ["ios", 216765],          ["asp.net", 209653],          ["css", 199932],          ["sql", 192739],          ["iphone", 190382],          [".net", 179522],          ["objective-c", 172609],          ["ruby-on-rails", 152860],          ["c", 129998],          ["ruby", 97414],          ["sql-server", 91050],          ["ajax", 85036],          ["xml", 84295],          ["regex", 81991],          ["arrays", 80728],          ["wpf", 80062],          ["asp.net-mvc", 79697],          ["database", 70777],          ["linux", 70772],          ["json", 70396],          ["django", 68893],          ["vb.net", 63061],          ["windows", 62042],          ["xcode", 60950],          ["eclipse", 60512],          ["string", 54249],          ["facebook", 53745],          ["html5", 51015],          ["ruby-on-rails-3", 50109],          ["r", 49842],          ["multithreading", 49806],          ["winforms", 46643],          ["wordpress", 46632],          ["image", 45910],          ["forms", 41984],          ["performance", 40607],          ["osx", 40401],          ["visual-studio-2010", 40228],          ["spring", 40207],          ["node.js", 40041],          ["excel", 39973],          ["algorithm", 38661],          ["oracle", 38565],          ["swing", 38255],          ["git", 37842],          ["linq", 37489],          ["asp.net-mvc-3", 36902],          ["apache", 35533],          ["web-services", 35385],          ["wcf", 35242],          ["perl", 35138],          ["entity-framework", 34139],          ["sql-server-2008", 33827],          ["visual-studio", 33664],          ["bash", 33139],          ["hibernate", 32263],          ["actionscript-3", 31760],          ["ipad", 29476],          ["matlab", 29210],          ["qt", 28918],          ["cocoa-touch", 28753],          ["list", 28556],          ["cocoa", 28385],          ["file", 28200],          ["sqlite", 28114],          [".htaccess", 28006],          ["flash", 27908],          ["api", 27480],          ["angularjs", 27042],          ["jquery-ui", 26906],          ["function", 26485],          ["codeigniter", 26426],          ["mongodb", 26223],          ["class", 25925],          ["silverlight", 25878],          ["tsql", 25706],          ["css3", 25535],          ["delphi", 25421],          ["security", 25325],          ["google-maps", 24919],          ["vba", 24301],          ["internet-explorer", 24270],          ["postgresql", 24236],          ["jsp", 24224],          ["shell", 24184],          ["google-app-engine", 23892],          ["oop", 23634],          ["sockets", 23464],          ["validation", 23429],          ["unit-testing", 23249]         ];                   WordCloud(document.getElementById('cloud'), {           list : tags.map(function(word) { return [word[0], Math.round(word[1]/5500)]; })         });                   var clicked = function(ev) {           if (ev.target.nodeName === "SPAN") {             var tag = ev.target.textContent;             var tagElem;             if (tags.some(function(el) { if (el[0] === tag) {tagElem = el; return true;} return false; })) {             document.getElementById("details").innerHTML = "There were " + tagElem[1] + " <a href='http://www.dusystem.com/query?tag=" + tag + "&sum=" + tagElem[1] + "'>Stack Overflow questions tagged '" + tag + "'</a>"; //innerText             }           } else {             document.getElementById("details").innerHTML = "";           }         }         document.getElementById("cloud").addEventListener("click", clicked)       </script> </body> </html>

　　

随机样式效果：