mirror of https://github.com/vbatts/imgsrv.git
95 lines
2.4 KiB
JavaScript
95 lines
2.4 KiB
JavaScript
/*!
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* jquery.tagcloud.js
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* A Simple Tag Cloud Plugin for JQuery
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*
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* https://github.com/addywaddy/jquery.tagcloud.js
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* created by Adam Groves
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*
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* License: https://github.com/addywaddy/jquery.tagcloud.js/blob/master/LICENSE
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*/
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(function($) {
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/*global jQuery*/
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"use strict";
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var compareWeights = function(a, b)
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{
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return a - b;
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};
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// Converts hex to an RGB array
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var toRGB = function(code) {
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if (code.length === 4) {
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code = code.replace(/(\w)(\w)(\w)/gi, "\$1\$1\$2\$2\$3\$3");
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}
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var hex = /(\w{2})(\w{2})(\w{2})/.exec(code);
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return [parseInt(hex[1], 16), parseInt(hex[2], 16), parseInt(hex[3], 16)];
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};
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// Converts an RGB array to hex
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var toHex = function(ary) {
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return "#" + jQuery.map(ary, function(i) {
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var hex = i.toString(16);
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hex = (hex.length === 1) ? "0" + hex : hex;
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return hex;
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}).join("");
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};
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var colorIncrement = function(color, range) {
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return jQuery.map(toRGB(color.end), function(n, i) {
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return (n - toRGB(color.start)[i])/range;
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});
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};
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var tagColor = function(color, increment, weighting) {
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var rgb = jQuery.map(toRGB(color.start), function(n, i) {
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var ref = Math.round(n + (increment[i] * weighting));
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if (ref > 255) {
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ref = 255;
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} else {
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if (ref < 0) {
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ref = 0;
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}
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}
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return ref;
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});
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return toHex(rgb);
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};
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$.fn.tagcloud = function(options) {
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var opts = $.extend({}, $.fn.tagcloud.defaults, options);
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var tagWeights = this.map(function(){
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return $(this).attr("rel");
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});
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tagWeights = jQuery.makeArray(tagWeights).sort(compareWeights);
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var lowest = tagWeights[0];
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var highest = tagWeights.pop();
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var range = highest - lowest;
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if(range === 0) {range = 1;}
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// Sizes
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var fontIncr, colorIncr;
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if (opts.size) {
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fontIncr = (opts.size.end - opts.size.start)/range;
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}
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// Colors
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if (opts.color) {
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colorIncr = colorIncrement (opts.color, range);
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}
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return this.each(function() {
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var weighting = $(this).attr("rel") - lowest;
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if (opts.size) {
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$(this).css({"font-size": opts.size.start + (weighting * fontIncr) + opts.size.unit});
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}
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if (opts.color) {
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$(this).css({"color": tagColor(opts.color, colorIncr, weighting)});
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}
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});
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};
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$.fn.tagcloud.defaults = {
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size: {start: 14, end: 18, unit: "pt"}
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};
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})(jQuery);
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