").addClass(errClass);
+ errorSpan.text(err.message);
+ $el.after(errorSpan);
+ }
+ } else if (display === "block") {
+ // If block, add an error just after the el, set visibility:none on the
+ // el, and position the error to be on top of the el.
+ // Mark it with a unique ID and CSS class so we can remove it later.
+ $el.css("visibility", "hidden");
+ if (err.message !== "") {
+ var errorDiv = $("").addClass(errClass).css("position", "absolute")
+ .css("top", el.offsetTop)
+ .css("left", el.offsetLeft)
+ // setting width can push out the page size, forcing otherwise
+ // unnecessary scrollbars to appear and making it impossible for
+ // the element to shrink; so use max-width instead
+ .css("maxWidth", el.offsetWidth)
+ .css("height", el.offsetHeight);
+ errorDiv.text(err.message);
+ $el.after(errorDiv);
+
+ // Really dumb way to keep the size/position of the error in sync with
+ // the parent element as the window is resized or whatever.
+ var intId = setInterval(function() {
+ if (!errorDiv[0].parentElement) {
+ clearInterval(intId);
+ return;
+ }
+ errorDiv
+ .css("top", el.offsetTop)
+ .css("left", el.offsetLeft)
+ .css("maxWidth", el.offsetWidth)
+ .css("height", el.offsetHeight);
+ }, 500);
+ }
+ }
+ },
+ clearError: function(el) {
+ var $el = $(el);
+ var display = $el.data("restore-display-mode");
+ $el.data("restore-display-mode", null);
+
+ if (display === "inline" || display === "inline-block") {
+ if (display)
+ $el.css("display", display);
+ $(el.nextSibling).filter(".htmlwidgets-error").remove();
+ } else if (display === "block"){
+ $el.css("visibility", "inherit");
+ $(el.nextSibling).filter(".htmlwidgets-error").remove();
+ }
+ },
+ sizing: {}
+ };
+
+ // Called by widget bindings to register a new type of widget. The definition
+ // object can contain the following properties:
+ // - name (required) - A string indicating the binding name, which will be
+ // used by default as the CSS classname to look for.
+ // - initialize (optional) - A function(el) that will be called once per
+ // widget element; if a value is returned, it will be passed as the third
+ // value to renderValue.
+ // - renderValue (required) - A function(el, data, initValue) that will be
+ // called with data. Static contexts will cause this to be called once per
+ // element; Shiny apps will cause this to be called multiple times per
+ // element, as the data changes.
+ window.HTMLWidgets.widget = function(definition) {
+ if (!definition.name) {
+ throw new Error("Widget must have a name");
+ }
+ if (!definition.type) {
+ throw new Error("Widget must have a type");
+ }
+ // Currently we only support output widgets
+ if (definition.type !== "output") {
+ throw new Error("Unrecognized widget type '" + definition.type + "'");
+ }
+ // TODO: Verify that .name is a valid CSS classname
+
+ // Support new-style instance-bound definitions. Old-style class-bound
+ // definitions have one widget "object" per widget per type/class of
+ // widget; the renderValue and resize methods on such widget objects
+ // take el and instance arguments, because the widget object can't
+ // store them. New-style instance-bound definitions have one widget
+ // object per widget instance; the definition that's passed in doesn't
+ // provide renderValue or resize methods at all, just the single method
+ // factory(el, width, height)
+ // which returns an object that has renderValue(x) and resize(w, h).
+ // This enables a far more natural programming style for the widget
+ // author, who can store per-instance state using either OO-style
+ // instance fields or functional-style closure variables (I guess this
+ // is in contrast to what can only be called C-style pseudo-OO which is
+ // what we required before).
+ if (definition.factory) {
+ definition = createLegacyDefinitionAdapter(definition);
+ }
+
+ if (!definition.renderValue) {
+ throw new Error("Widget must have a renderValue function");
+ }
+
+ // For static rendering (non-Shiny), use a simple widget registration
+ // scheme. We also use this scheme for Shiny apps/documents that also
+ // contain static widgets.
+ window.HTMLWidgets.widgets = window.HTMLWidgets.widgets || [];
+ // Merge defaults into the definition; don't mutate the original definition.
+ var staticBinding = extend({}, defaults, definition);
+ overrideMethod(staticBinding, "find", function(superfunc) {
+ return function(scope) {
+ var results = superfunc(scope);
+ // Filter out Shiny outputs, we only want the static kind
+ return filterByClass(results, "html-widget-output", false);
+ };
+ });
+ window.HTMLWidgets.widgets.push(staticBinding);
+
+ if (shinyMode) {
+ // Shiny is running. Register the definition with an output binding.
+ // The definition itself will not be the output binding, instead
+ // we will make an output binding object that delegates to the
+ // definition. This is because we foolishly used the same method
+ // name (renderValue) for htmlwidgets definition and Shiny bindings
+ // but they actually have quite different semantics (the Shiny
+ // bindings receive data that includes lots of metadata that it
+ // strips off before calling htmlwidgets renderValue). We can't
+ // just ignore the difference because in some widgets it's helpful
+ // to call this.renderValue() from inside of resize(), and if
+ // we're not delegating, then that call will go to the Shiny
+ // version instead of the htmlwidgets version.
+
+ // Merge defaults with definition, without mutating either.
+ var bindingDef = extend({}, defaults, definition);
+
+ // This object will be our actual Shiny binding.
+ var shinyBinding = new Shiny.OutputBinding();
+
+ // With a few exceptions, we'll want to simply use the bindingDef's
+ // version of methods if they are available, otherwise fall back to
+ // Shiny's defaults. NOTE: If Shiny's output bindings gain additional
+ // methods in the future, and we want them to be overrideable by
+ // HTMLWidget binding definitions, then we'll need to add them to this
+ // list.
+ delegateMethod(shinyBinding, bindingDef, "getId");
+ delegateMethod(shinyBinding, bindingDef, "onValueChange");
+ delegateMethod(shinyBinding, bindingDef, "onValueError");
+ delegateMethod(shinyBinding, bindingDef, "renderError");
+ delegateMethod(shinyBinding, bindingDef, "clearError");
+ delegateMethod(shinyBinding, bindingDef, "showProgress");
+
+ // The find, renderValue, and resize are handled differently, because we
+ // want to actually decorate the behavior of the bindingDef methods.
+
+ shinyBinding.find = function(scope) {
+ var results = bindingDef.find(scope);
+
+ // Only return elements that are Shiny outputs, not static ones
+ var dynamicResults = results.filter(".html-widget-output");
+
+ // It's possible that whatever caused Shiny to think there might be
+ // new dynamic outputs, also caused there to be new static outputs.
+ // Since there might be lots of different htmlwidgets bindings, we
+ // schedule execution for later--no need to staticRender multiple
+ // times.
+ if (results.length !== dynamicResults.length)
+ scheduleStaticRender();
+
+ return dynamicResults;
+ };
+
+ // Wrap renderValue to handle initialization, which unfortunately isn't
+ // supported natively by Shiny at the time of this writing.
+
+ shinyBinding.renderValue = function(el, data) {
+ Shiny.renderDependencies(data.deps);
+ // Resolve strings marked as javascript literals to objects
+ if (!(data.evals instanceof Array)) data.evals = [data.evals];
+ for (var i = 0; data.evals && i < data.evals.length; i++) {
+ window.HTMLWidgets.evaluateStringMember(data.x, data.evals[i]);
+ }
+ if (!bindingDef.renderOnNullValue) {
+ if (data.x === null) {
+ el.style.visibility = "hidden";
+ return;
+ } else {
+ el.style.visibility = "inherit";
+ }
+ }
+ if (!elementData(el, "initialized")) {
+ initSizing(el);
+
+ elementData(el, "initialized", true);
+ if (bindingDef.initialize) {
+ var result = bindingDef.initialize(el, el.offsetWidth,
+ el.offsetHeight);
+ elementData(el, "init_result", result);
+ }
+ }
+ bindingDef.renderValue(el, data.x, elementData(el, "init_result"));
+ evalAndRun(data.jsHooks.render, elementData(el, "init_result"), [el, data.x]);
+ };
+
+ // Only override resize if bindingDef implements it
+ if (bindingDef.resize) {
+ shinyBinding.resize = function(el, width, height) {
+ // Shiny can call resize before initialize/renderValue have been
+ // called, which doesn't make sense for widgets.
+ if (elementData(el, "initialized")) {
+ bindingDef.resize(el, width, height, elementData(el, "init_result"));
+ }
+ };
+ }
+
+ Shiny.outputBindings.register(shinyBinding, bindingDef.name);
+ }
+ };
+
+ var scheduleStaticRenderTimerId = null;
+ function scheduleStaticRender() {
+ if (!scheduleStaticRenderTimerId) {
+ scheduleStaticRenderTimerId = setTimeout(function() {
+ scheduleStaticRenderTimerId = null;
+ window.HTMLWidgets.staticRender();
+ }, 1);
+ }
+ }
+
+ // Render static widgets after the document finishes loading
+ // Statically render all elements that are of this widget's class
+ window.HTMLWidgets.staticRender = function() {
+ var bindings = window.HTMLWidgets.widgets || [];
+ forEach(bindings, function(binding) {
+ var matches = binding.find(document.documentElement);
+ forEach(matches, function(el) {
+ var sizeObj = initSizing(el, binding);
+
+ if (hasClass(el, "html-widget-static-bound"))
+ return;
+ el.className = el.className + " html-widget-static-bound";
+
+ var initResult;
+ if (binding.initialize) {
+ initResult = binding.initialize(el,
+ sizeObj ? sizeObj.getWidth() : el.offsetWidth,
+ sizeObj ? sizeObj.getHeight() : el.offsetHeight
+ );
+ elementData(el, "init_result", initResult);
+ }
+
+ if (binding.resize) {
+ var lastSize = {};
+ var resizeHandler = function(e) {
+ var size = {
+ w: sizeObj ? sizeObj.getWidth() : el.offsetWidth,
+ h: sizeObj ? sizeObj.getHeight() : el.offsetHeight
+ };
+ if (size.w === 0 && size.h === 0)
+ return;
+ if (size.w === lastSize.w && size.h === lastSize.h)
+ return;
+ lastSize = size;
+ binding.resize(el, size.w, size.h, initResult);
+ };
+
+ on(window, "resize", resizeHandler);
+
+ // This is needed for cases where we're running in a Shiny
+ // app, but the widget itself is not a Shiny output, but
+ // rather a simple static widget. One example of this is
+ // an rmarkdown document that has runtime:shiny and widget
+ // that isn't in a render function. Shiny only knows to
+ // call resize handlers for Shiny outputs, not for static
+ // widgets, so we do it ourselves.
+ if (window.jQuery) {
+ window.jQuery(document).on(
+ "shown.htmlwidgets shown.bs.tab.htmlwidgets shown.bs.collapse.htmlwidgets",
+ resizeHandler
+ );
+ window.jQuery(document).on(
+ "hidden.htmlwidgets hidden.bs.tab.htmlwidgets hidden.bs.collapse.htmlwidgets",
+ resizeHandler
+ );
+ }
+
+ // This is needed for the specific case of ioslides, which
+ // flips slides between display:none and display:block.
+ // Ideally we would not have to have ioslide-specific code
+ // here, but rather have ioslides raise a generic event,
+ // but the rmarkdown package just went to CRAN so the
+ // window to getting that fixed may be long.
+ if (window.addEventListener) {
+ // It's OK to limit this to window.addEventListener
+ // browsers because ioslides itself only supports
+ // such browsers.
+ on(document, "slideenter", resizeHandler);
+ on(document, "slideleave", resizeHandler);
+ }
+ }
+
+ var scriptData = document.querySelector("script[data-for='" + el.id + "'][type='application/json']");
+ if (scriptData) {
+ var data = JSON.parse(scriptData.textContent || scriptData.text);
+ // Resolve strings marked as javascript literals to objects
+ if (!(data.evals instanceof Array)) data.evals = [data.evals];
+ for (var k = 0; data.evals && k < data.evals.length; k++) {
+ window.HTMLWidgets.evaluateStringMember(data.x, data.evals[k]);
+ }
+ binding.renderValue(el, data.x, initResult);
+ evalAndRun(data.jsHooks.render, initResult, [el, data.x]);
+ }
+ });
+ });
+
+ invokePostRenderHandlers();
+ }
+
+ // Wait until after the document has loaded to render the widgets.
+ if (document.addEventListener) {
+ document.addEventListener("DOMContentLoaded", function() {
+ document.removeEventListener("DOMContentLoaded", arguments.callee, false);
+ window.HTMLWidgets.staticRender();
+ }, false);
+ } else if (document.attachEvent) {
+ document.attachEvent("onreadystatechange", function() {
+ if (document.readyState === "complete") {
+ document.detachEvent("onreadystatechange", arguments.callee);
+ window.HTMLWidgets.staticRender();
+ }
+ });
+ }
+
+
+ window.HTMLWidgets.getAttachmentUrl = function(depname, key) {
+ // If no key, default to the first item
+ if (typeof(key) === "undefined")
+ key = 1;
+
+ var link = document.getElementById(depname + "-" + key + "-attachment");
+ if (!link) {
+ throw new Error("Attachment " + depname + "/" + key + " not found in document");
+ }
+ return link.getAttribute("href");
+ };
+
+ window.HTMLWidgets.dataframeToD3 = function(df) {
+ var names = [];
+ var length;
+ for (var name in df) {
+ if (df.hasOwnProperty(name))
+ names.push(name);
+ if (typeof(df[name]) !== "object" || typeof(df[name].length) === "undefined") {
+ throw new Error("All fields must be arrays");
+ } else if (typeof(length) !== "undefined" && length !== df[name].length) {
+ throw new Error("All fields must be arrays of the same length");
+ }
+ length = df[name].length;
+ }
+ var results = [];
+ var item;
+ for (var row = 0; row < length; row++) {
+ item = {};
+ for (var col = 0; col < names.length; col++) {
+ item[names[col]] = df[names[col]][row];
+ }
+ results.push(item);
+ }
+ return results;
+ };
+
+ window.HTMLWidgets.transposeArray2D = function(array) {
+ if (array.length === 0) return array;
+ var newArray = array[0].map(function(col, i) {
+ return array.map(function(row) {
+ return row[i]
+ })
+ });
+ return newArray;
+ };
+ // Split value at splitChar, but allow splitChar to be escaped
+ // using escapeChar. Any other characters escaped by escapeChar
+ // will be included as usual (including escapeChar itself).
+ function splitWithEscape(value, splitChar, escapeChar) {
+ var results = [];
+ var escapeMode = false;
+ var currentResult = "";
+ for (var pos = 0; pos < value.length; pos++) {
+ if (!escapeMode) {
+ if (value[pos] === splitChar) {
+ results.push(currentResult);
+ currentResult = "";
+ } else if (value[pos] === escapeChar) {
+ escapeMode = true;
+ } else {
+ currentResult += value[pos];
+ }
+ } else {
+ currentResult += value[pos];
+ escapeMode = false;
+ }
+ }
+ if (currentResult !== "") {
+ results.push(currentResult);
+ }
+ return results;
+ }
+ // Function authored by Yihui/JJ Allaire
+ window.HTMLWidgets.evaluateStringMember = function(o, member) {
+ var parts = splitWithEscape(member, '.', '\\');
+ for (var i = 0, l = parts.length; i < l; i++) {
+ var part = parts[i];
+ // part may be a character or 'numeric' member name
+ if (o !== null && typeof o === "object" && part in o) {
+ if (i == (l - 1)) { // if we are at the end of the line then evalulate
+ if (typeof o[part] === "string")
+ o[part] = eval("(" + o[part] + ")");
+ } else { // otherwise continue to next embedded object
+ o = o[part];
+ }
+ }
+ }
+ };
+
+ // Retrieve the HTMLWidget instance (i.e. the return value of an
+ // HTMLWidget binding's initialize() or factory() function)
+ // associated with an element, or null if none.
+ window.HTMLWidgets.getInstance = function(el) {
+ return elementData(el, "init_result");
+ };
+
+ // Finds the first element in the scope that matches the selector,
+ // and returns the HTMLWidget instance (i.e. the return value of
+ // an HTMLWidget binding's initialize() or factory() function)
+ // associated with that element, if any. If no element matches the
+ // selector, or the first matching element has no HTMLWidget
+ // instance associated with it, then null is returned.
+ //
+ // The scope argument is optional, and defaults to window.document.
+ window.HTMLWidgets.find = function(scope, selector) {
+ if (arguments.length == 1) {
+ selector = scope;
+ scope = document;
+ }
+
+ var el = scope.querySelector(selector);
+ if (el === null) {
+ return null;
+ } else {
+ return window.HTMLWidgets.getInstance(el);
+ }
+ };
+
+ // Finds all elements in the scope that match the selector, and
+ // returns the HTMLWidget instances (i.e. the return values of
+ // an HTMLWidget binding's initialize() or factory() function)
+ // associated with the elements, in an array. If elements that
+ // match the selector don't have an associated HTMLWidget
+ // instance, the returned array will contain nulls.
+ //
+ // The scope argument is optional, and defaults to window.document.
+ window.HTMLWidgets.findAll = function(scope, selector) {
+ if (arguments.length == 1) {
+ selector = scope;
+ scope = document;
+ }
+
+ var nodes = scope.querySelectorAll(selector);
+ var results = [];
+ for (var i = 0; i < nodes.length; i++) {
+ results.push(window.HTMLWidgets.getInstance(nodes[i]));
+ }
+ return results;
+ };
+
+ var postRenderHandlers = [];
+ function invokePostRenderHandlers() {
+ while (postRenderHandlers.length) {
+ var handler = postRenderHandlers.shift();
+ if (handler) {
+ handler();
+ }
+ }
+ }
+
+ // Register the given callback function to be invoked after the
+ // next time static widgets are rendered.
+ window.HTMLWidgets.addPostRenderHandler = function(callback) {
+ postRenderHandlers.push(callback);
+ };
+
+ // Takes a new-style instance-bound definition, and returns an
+ // old-style class-bound definition. This saves us from having
+ // to rewrite all the logic in this file to accomodate both
+ // types of definitions.
+ function createLegacyDefinitionAdapter(defn) {
+ var result = {
+ name: defn.name,
+ type: defn.type,
+ initialize: function(el, width, height) {
+ return defn.factory(el, width, height);
+ },
+ renderValue: function(el, x, instance) {
+ return instance.renderValue(x);
+ },
+ resize: function(el, width, height, instance) {
+ return instance.resize(width, height);
+ }
+ };
+
+ if (defn.find)
+ result.find = defn.find;
+ if (defn.renderError)
+ result.renderError = defn.renderError;
+ if (defn.clearError)
+ result.clearError = defn.clearError;
+
+ return result;
+ }
+})();
+
diff --git a/js/wordcloud2-all.js b/js/wordcloud2-all.js
new file mode 100644
index 0000000..5a1b56e
--- /dev/null
+++ b/js/wordcloud2-all.js
@@ -0,0 +1,1149 @@
+/*!
+ * wordcloud2.js
+ * http://timdream.org/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 minFontSize = (function getMinFontSize() {
+ 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,
+
+ classes: null,
+
+ 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;
+ function random_hsl_color(min, max) {
+ return 'hsl(' +
+ (Math.random() * 360).toFixed() + ',' +
+ (Math.random() * 30 + 70).toFixed() + '%,' +
+ (Math.random() * (max - min) + min).toFixed() + '%)';
+ }
+ switch (settings.color) {
+ case 'random-dark':
+ getTextColor = function getRandomDarkColor() {
+ return random_hsl_color(10, 50);
+ };
+ break;
+
+ case 'random-light':
+ getTextColor = function getRandomLightColor() {
+ return random_hsl_color(50, 90);
+ };
+ break;
+
+ default:
+ if (typeof settings.color === 'function') {
+ getTextColor = settings.color;
+ }
+ break;
+ }
+
+ /* function for getting the classes of the text */
+ var getTextClasses = null;
+ if (typeof settings.classes === 'function') {
+ getTextClasses = settings.classes;
+ }
+
+ /* Interactive */
+ var interactive = false;
+ var infoGrid = [];
+ var hovered;
+
+ var getInfoGridFromMouseTouchEvent =
+ function getInfoGridFromMouseTouchEvent(evt) {
+ var canvas = evt.currentTarget;
+ var rect = canvas.getBoundingClientRect();
+ var clientX;
+ var clientY;
+ /** Detect if touches are available */
+ if (evt.touches) {
+ clientX = evt.touches[0].clientX;
+ clientY = evt.touches[0].clientY;
+ } else {
+ clientX = evt.clientX;
+ clientY = evt.clientY;
+ }
+ var eventX = clientX - rect.left;
+ var eventY = 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 = getInfoGridFromMouseTouchEvent(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 = getInfoGridFromMouseTouchEvent(evt);
+ if (!info) {
+ return;
+ }
+
+ settings.click(info.item, info.dimension, evt);
+ evt.preventDefault();
+ };
+
+ /* 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 < minFontSize) {
+ mu = (function calculateScaleFactor() {
+ var mu = 2;
+ while (mu * fontSize < minFontSize) {
+ 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 if (settings.color instanceof Array) {
+ color = settings.color.shift() || 'black'; // pass a array in setting, default 'black'
+ } else {
+ color = settings.color;
+ }
+
+ var classes;
+ if (getTextClasses) {
+ classes = getTextClasses(word, weight, fontSize, distance, theta);
+ } else {
+ classes = settings.classes;
+ }
+
+ 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 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',
+ 'lineHeight': fontSize + 'px',
+ 'whiteSpace': 'nowrap',
+ 'transform': transformRule,
+ 'webkitTransform': transformRule,
+ 'msTransform': transformRule,
+ 'transformOrigin': '50% 40%',
+ 'webkitTransformOrigin': '50% 40%',
+ 'msTransformOrigin': '50% 40%'
+ };
+ if (color) {
+ styleRules.color = color;
+ }
+ 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]);
+ }
+ }
+ if (classes) {
+ span.className += classes;
+ }
+ 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('touchstart', wordcloudclick);
+ canvas.addEventListener('touchend', function (e) {
+ e.preventDefault();
+ });
+ canvas.style.webkitTapHighlightColor = 'rgba(0, 0, 0, 0)';
+ }
+
+ 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.minFontSize = minFontSize;
+
+ // Expose the library as an AMD module
+ if (typeof define === 'function' && define.amd) {
+ define('wordcloud', [], function() { return WordCloud; });
+ } else if (typeof module !== 'undefined' && module.exports) {
+ module.exports = WordCloud;
+ } else {
+ global.WordCloud = WordCloud;
+ }
+
+})(this); //jshint ignore:line
diff --git a/js/wordcloud2.js b/js/wordcloud2.js
new file mode 100644
index 0000000..5467969
--- /dev/null
+++ b/js/wordcloud2.js
@@ -0,0 +1,51 @@
+HTMLWidgets.widget({
+ name: "wordcloud2",
+ type: "output",
+ initialize: function(el, width, height) {
+ var newCanvas = document.createElement("canvas");
+ newCanvas.height = height;
+ newCanvas.width = width;
+ newCanvas.id = "canvas";
+
+ el.appendChild(newCanvas);
+ newlabel(el);
+ return(el.firstChild);
+ },
+ renderValue: function(el, x, instance) {
+ // parse gexf data
+ listData=[];
+ for(var i=0; i
-