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<html>
<head>
<meta name="viewport" content="width=device-width,
initial-scale=1.0,maximum-scale=1.0" />
<style type="text/css">
canvas {
border: 1px solid black;
width: 700px;
height: 700px;
}
</style>
<script type="text/javascript">
function TagCloud(w, h, context) {
"use strict";
this.ctx = context;
this.canvasWidth = w;
this.canvasHeight = h;
this.fontSize = this.canvasHeight / 3;
this.shape = "rectangle";
}
TagCloud.prototype.setShape = function () {
this.shape = "circle";
};
TagCloud.prototype.render = function (tags) {
this.ctx.textBaseline = "top";
tags.forEach(function (tag) {
this.placeTag(tag[0]);
}, this);
};
TagCloud.prototype.placeTag = function (tag) {
var placement;
while (!(placement = this._getNonOverlappingPlaceWithBestSize(
this.fontSize, tag)))
this.fontSize *= 0.9;
this.ctx.fillStyle = this._getRandomColor();
this.ctx.fillText(tag, placement.x, placement.y);
};
TagCloud.prototype._getNonOverlappingPlaceWithBestSize =
function (fontSize, tag) {
this.ctx.font = "" + fontSize + "pt " + "Arial";
var lineHeight=this.getLineHeight(fontSize);
var tagWidth = this.ctx.measureText(tag).width;
var base = new BasePlacement(
(this.canvasWidth - tagWidth) * Math.random(),
(this.canvasHeight - lineHeight) * Math.random(),
lineHeight
);
var placement;
/* jshint ignore:start */
while (placement = base.nextPlaceToTry()) {
if (this._isPlaceEmpty(placement, tagWidth, lineHeight))
break;
}
/* jshint ignore:end */
return placement;
};
TagCloud.prototype.getLineHeight = function (fontSize) {
return this.ctx.measureText('M').width * 1.2;
}
TagCloud.prototype._getRandomColor = function (){
var colors = ["aqua", "black", "blue", "fuchsia", "gray", "green",
"lime", "maroon", "navy", "olive", "orange", "purple",
"red", "silver", "teal"];
return colors[Math.floor(colors.length * Math.random())];
};
TagCloud.prototype._isPlaceEmpty = function (placement, width, height) {
if (placement.x < 0 || placement.y < 0 || placement.x + width >
this.canvasWidth || placement.y + height > this.canvasHeight)
return false;
var pix = this.ctx.getImageData(
placement.x, placement.y, width, height).data;
for (var i = 0, n = pix.length; i < n; i += 4)
if (pix[i+3])
return false;
return [[placement.x, placement.y],
[placement.x + width, placement.y],
[placement.x, placement.y + height],
[placement.x + width, placement.y + height]].every(
function(pos) {
var a = this.canvasWidth / 2;
var b = this.canvasHeight / 2;
var X = pos[0] - a;
var Y = pos[1] - b;
return (X * X / a / a + Y * Y / b / b < 1);
}, this);
};
TagCloud.prototype.getCoverage = function () {
var pix = this.ctx.getImageData(
0, 0, this.canvasWidth, this.canvasHeight).data;
var pixCount = 0;
for (var i = 0, n = pix.length; i < n; i += 4) {
if (pix[i+3])
pixCount++;
}
return pixCount * 100 / this.canvasWidth / this.canvasHeight;
};
function BasePlacement(x, y, h) {
var baseX = x,
baseY = y,
scale = h,
tryNumber = 0;
this.nextPlaceToTry = function() {
if (tryNumber < this._spiralOffsets.length)
return {
x : baseX + this._spiralOffsets[tryNumber][0] * scale,
y : baseY + this._spiralOffsets[tryNumber++][1] * scale
};
};
}
function generateSpiralOffsets() {
var spiralOffsets = [];
var radius = 0;
var dr = 0.2;
for (var i = 0; radius < 40; i+=0.4, radius += dr) {
spiralOffsets.push([
radius * Math.sin(i),
radius * Math.cos(i)
]);
}
return spiralOffsets;
}
BasePlacement.prototype._spiralOffsets = generateSpiralOffsets();
</script>
<script type="application/javascript">
function draw() {
var canvas = document.getElementById("canvas");
if (canvas.getContext) {
var ctx = canvas.getContext("2d");
// scale 2x
if(window.devicePixelRatio == 2) {
canvas.setAttribute('width', canvas.width * 2);
canvas.setAttribute('height', canvas.height * 2);
}
var tagCloud = new TagCloud(canvas.width,
canvas.height, ctx);
tagCloud.render([ ["user", 169],
["email", 121],
["params", 112],
["h", 95],
["true", 93],
["new", 87],
["format", 87],
["include", 81],
["current_user", 76],
["m", 68],
["name", 65],
["redirect_to", 65],
["update", 61],
["render", 60],
["flash", 53],
["id", 52],
["html", 52],
["module", 52],
["validates", 51],
["course", 51],
["notice", 50],
["destroy", 49],
["%", 49],
["content_tag", 47],
["nil", 46],
["User", 46],
["w", 45],
["layout", 44],
["presence", 44],
["item", 43],
["create", 43],
["link", 42],
["@less_course", 41],
["errors", 40],
["where", 38],
["Base", 38],
["html_safe", 37],
["require", 37],
["actionable", 37],
["respond_to", 37],
["ActiveRecord", 37],
["respond_with", 36],
["options", 36],
["each", 35],
["collect", 35],
["ApplicationController", 35],
["json", 35],
["company", 34],
["index", 34],
["permit", 33],
["belongs_to", 33],
["billing_info", 33],
["show", 33],
["before_action", 33],
["unless", 33],
["locale", 32],
["url", 31],
["edit", 30],
["message", 29],
["action", 29],
["@event", 29],
["has_many", 29],
["find", 28],
["Less", 27],
["link_to", 27],
["@user", 27],
["can", 27],
["contact", 26],
["extend", 26],
["save", 26],
["all", 26],
["Contact", 26],
["location", 26],
["add", 26],
["ActiveSupport", 26],
["filename", 25],
["not", 25],
["title", 25],
["included", 25],
["x", 25],
["Concern", 25],
["config", 24],
["@contact", 24],
["1", 24],
["default", 24],
["vat_number", 23],
["object", 23],
["empty?", 23],
["Time", 23],
["now", 23],
["Course", 23],
["join", 22],
["current_time", 22],
["alert", 22],
["url_for", 22],
["utc", 22],
["t", 21],
["permlink", 21],
["find_by", 21],
["c", 21],
["current_url", 21],
["present?", 20],
["menu", 20],
["and", 20],
["validate", 20],
["@confirmable", 20],
["UserMailer", 20],
["Draper", 20],
["@title", 19],
["0", 19],
["city", 19],
["only", 19],
["I18n", 19],
["Rails", 19],
["occasion", 19],
["type", 18],
["@involvement_request", 18],
["cert_type", 18],
["a", 18],
["dependent", 18],
["@scrum_course", 17],
["country", 17],
["Decorator", 17],
["invoice", 17],
["course_like", 17],
["status", 17],
["@invoice", 16],
["description", 16],
["payable", 16],
["not_found", 16],
["@company", 16],
["request", 16],
["Actions", 16],
["delegate_all", 15],
["scope", 15],
["less_course_type", 15],
["data", 15],
["first", 15],
["amount", 15],
["attr_accessor", 15],
["false", 15],
["env", 14],
["super", 14],
["paid_at", 14],
["@course_template", 14],
["Certificate", 14],
["cert", 14],
["full_name", 14],
["tabs", 14],
["confirmation_token", 14],
["Conditions", 13],
["course_attachments", 13],
["date", 13],
["contactable", 13],
["nil?", 13],
["created_at", 13],
["through", 13],
["participants", 13],
["update_attribute", 13],
["send", 13],
["li", 13],
["admin", 13],
["_tab_for", 13],
["content", 12],
["result", 12],
["subject", 12],
["protected", 12],
["case_study", 12],
["template", 12],
["class_name", 12],
["@receipt", 12],
["v", 12],
["firstname", 12],
["lastname", 12],
["to_date", 12],
["state", 12],
["Company", 12],
["rescue", 11],
["@broken_link", 11],
["notify_now", 11],
["to_sym", 11],
["@course_type", 11],
["Event", 11],
["r", 11],
["persisted?", 11],
["to_s", 11],
["admin?", 11],
["ApplicationJob", 11],
["value", 11],
["@course_attachment", 11],
["count", 11],
["InvolvementRequest", 10],
["cert_types", 10],
["Receipt", 10],
["perform", 10],
["@case_study", 10],
["Exam", 10],
["head", 10],
["recurrence", 10],
["input_html_options", 10],
["queue", 10],
["speaker_email", 10],
["decorate", 10],
["events", 10],
["@payable", 10],
["or", 10],
["include?", 10],
["u", 10],
["@message", 10],
["ScrumCourse", 10],
["owners", 10],
["no_content", 10],
["e", 10],
["sidekiq_options", 10],
["path", 9],
["deliver_now", 9],
["@course_request", 9],
["mail", 9],
["receipt", 9],
["icon", 9],
["Action", 9],
["load_and_authorize_resource", 9],
["read", 9],
["MailerUrlHelper", 9],
["to", 9],
["select", 9],
["@exception", 9],
["find_by_permlink", 9],
["since", 9],
["dont", 9],
["display_name", 9],
["last", 9],
["action_type", 9],
["contacts", 9],
["unprocessable_entity", 9],
["@users", 9],
["vat", 9],
["course_students", 9],
["ip", 8],
["valid?", 8],
["paid?", 8],
["user_email", 8],
["admins", 8],
["Ckeditor", 8],
["td", 8],
["trainer", 8],
["payment_description", 8],
["event", 8],
["@page", 8],
["approved", 8],
["full_payment", 8],
["try", 8],
["@course_photo", 8],
["choose_layout", 8],
["category", 8],
["receipts", 8],
["trainer_setting", 8],
["key", 8],
["updated_at", 8],
["expire_date", 8],
["60000", 7],
["model_name", 7],
["timeout", 7],
["dashboard_path", 7],
["split", 7],
["to_param", 7],
["role", 7],
["node", 7],
["settled_date", 7],
["send_email", 7],
["submenu", 7],
["scrum_course_type", 7],
["monetize", 7],
["index_page", 7],
["BrokenLink", 7],
["load", 7],
["source", 7],
["back", 7],
["ul", 7],
["uniqueness", 7],
["order_by_date", 7],
["CourseTemplate", 7],
["warden_conditions", 7],
["lock", 7],
["collection", 7],
["date_options", 7],
["merge", 7],
["joins", 7],
["login", 7],
["records", 7],
["i", 7],
["as_first", 7],
["@mass_mail", 7],
["klass", 7],
["k", 6],
["unpaid_amount", 6],
["2", 6],
["minute_of_hour", 6],
["Invoice", 6],
["bounds", 6],
["check_vat_number", 6],
["contact_params", 6],
["rescue_from", 6],
["resource", 6],
["yield", 6],
["photos", 6],
["photo_file", 6],
["Content", 6],
["captured", 6],
["confirm", 6],
["raw_items", 6],
["paid_amount", 6],
["CourseLike", 6],
["paid_offline", 6],
["certificates", 6],
["side_menu", 6],
["to_menu", 6],
["hourly", 6],
["user_company", 6],
["@person_quiz", 6],
["raw", 6],
["class_eval", 6],
["payment", 6],
["span", 6],
["invoice_date", 6],
["tap", 6],
["trigger_action", 6],
["region2", 6],
["region1", 6],
["@user_company", 6],
["owner", 6],
["after_save", 6],
["before_validation", 6],
["certificate_type", 6],
["importance", 6],
["ActionController", 6],
["short_name", 6],
["is_a?", 6],
["root_path", 6],
["url_for_id", 5],
["delegate", 5],
["100", 5],
["Menu", 5],
["1000", 5],
["Occasion", 5],
["action_on_actionable", 5],
["trainer?", 5],
["created", 5],
["active", 5],
["unit_price", 5],
["CaseStudy", 5],
["photo", 5],
["Sidekiq", 5],
["HasEmail", 5],
["production?", 5],
["attr", 5],
["@occasion", 5],
["occasion_owners", 5],
["div", 5],
["CourseType", 5],
["figure", 5],
["CanCan", 5],
["order", 5],
["to_money", 5],
["certified?", 5],
["valid_period", 5],
["param", 5],
["send_file", 5],
["occasions", 5],
["list_page", 5],
["with", 5],
["as", 5],
["i18n", 5],
["MarkdownTree", 5],
["Worker", 5],
["tax_rate", 5],
["Eurovat", 5],
["@action", 5],
["File", 5],
["find_or_initialize_by", 5],
["@certificate", 5],
["involvements", 5],
["restrict_with_exception", 5],
["session", 5],
["UserCompany", 5],
["polymorphic", 5],
["user_id", 5],
["pl", 5],
["referer", 5],
["find_by_email", 5],
["set_object", 5],
["Graphic", 5],
["handle_timecop_offset", 5],
["Student", 5],
["company_id", 5],
["manage", 5],
["upcoming", 5],
["CoursePhoto", 5],
["text", 5],
["pay_as_individual", 5],
]);
}
}
</script>
</head>
<body onload="draw();">
<canvas id="canvas" width="700" height="700"></canvas>
</body>
</html>
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