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增加随机定位范围选项 coord 。 #7

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增加随机定位范围选项 coord 。 #7

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171 changes: 98 additions & 73 deletions jquery.tagcloud.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5,88 +5,113 @@
* https://github.com/addywaddy/jquery.tagcloud.js
* created by Adam Groves
*/
(function($) {
(function ($) {

/*global jQuery*/
"use strict";
"use strict";

var compareWeights = function(a, b)
{
return a - b;
};
var compareWeights = function (a, b) {
return a - b;
};

// Converts hex to an RGB array
var toRGB = function(code) {
if (code.length === 4) {
code = code.replace(/(\w)(\w)(\w)/gi, "\$1\$1\$2\$2\$3\$3");
}
var hex = /(\w{2})(\w{2})(\w{2})/.exec(code);
return [parseInt(hex[1], 16), parseInt(hex[2], 16), parseInt(hex[3], 16)];
};
// Converts hex to an RGB array
var toRGB = function (code) {
if (code.length === 4) {
code = code.replace(/(\w)(\w)(\w)/gi, "\$1\$1\$2\$2\$3\$3");
}
var hex = /(\w{2})(\w{2})(\w{2})/.exec(code);
return [parseInt(hex[1], 16), parseInt(hex[2], 16), parseInt(hex[3], 16)];
};

// Converts an RGB array to hex
var toHex = function(ary) {
return "#" + jQuery.map(ary, function(i) {
var hex = i.toString(16);
hex = (hex.length === 1) ? "0" + hex : hex;
return hex;
}).join("");
};
// Converts an RGB array to hex
var toHex = function (ary) {
return "#" + jQuery.map(ary, function (i) {
var hex = i.toString(16);
hex = (hex.length === 1) ? "0" + hex : hex;
return hex;
}).join("");
};

var colorIncrement = function(color, range) {
return jQuery.map(toRGB(color.end), function(n, i) {
return (n - toRGB(color.start)[i])/range;
});
};
var colorIncrement = function (color, range) {
return jQuery.map(toRGB(color.end), function (n, i) {
return (n - toRGB(color.start)[i]) / range;
});
};

var tagColor = function(color, increment, weighting) {
var rgb = jQuery.map(toRGB(color.start), function(n, i) {
var ref = Math.round(n + (increment[i] * weighting));
if (ref > 255) {
ref = 255;
} else {
if (ref < 0) {
ref = 0;
}
}
return ref;
});
return toHex(rgb);
};
var tagColor = function (color, increment, weighting) {
var rgb = jQuery.map(toRGB(color.start), function (n, i) {
var ref = Math.round(n + (increment[i] * weighting));
if (ref > 255) {
ref = 255;
} else {
if (ref < 0) {
ref = 0;
}
}
return ref;
});
return toHex(rgb);
};

$.fn.tagcloud = function(options) {
$.fn.tagcloud = function (options) {

var opts = $.extend({}, $.fn.tagcloud.defaults, options);
var tagWeights = this.map(function(){
return $(this).attr("rel");
});
tagWeights = jQuery.makeArray(tagWeights).sort(compareWeights);
var lowest = tagWeights[0];
var highest = tagWeights.pop();
var range = highest - lowest;
if(range === 0) {range = 1;}
// Sizes
var fontIncr, colorIncr;
if (opts.size) {
fontIncr = (opts.size.end - opts.size.start)/range;
}
// Colors
if (opts.color) {
colorIncr = colorIncrement (opts.color, range);
}
return this.each(function() {
var weighting = $(this).attr("rel") - lowest;
if (opts.size) {
$(this).css({"font-size": opts.size.start + (weighting * fontIncr) + opts.size.unit});
}
if (opts.color) {
$(this).css({"color": tagColor(opts.color, colorIncr, weighting)});
}
});
};
var opts = $.extend({}, $.fn.tagcloud.defaults, options);
var tagWeights = this.map(function () {
return $(this).attr("data-weight");
});
tagWeights = jQuery.makeArray(tagWeights).sort(compareWeights);
var lowest = tagWeights[0];
var highest = tagWeights.pop();
var range = highest - lowest;
if (range === 0) {
range = 1;
}
// Sizes
var fontIncr,
colorIncr;
if (opts.size) {
fontIncr = (opts.size.end - opts.size.start) / range;
}
// Colors
if (opts.color) {
colorIncr = colorIncrement(opts.color, range);
}
var ret= this.each(function () {
var weighting = $(this).attr("data-weight") - lowest;
if (opts.size) {
$(this).css({
"font-size" : opts.size.start + (weighting * fontIncr) + opts.size.unit
});
}
if (opts.color) {
$(this).css({
"color" : tagColor(opts.color, colorIncr, weighting)
});
}
if (opts.coord){
$(this).css({
'top': Math.random()* opts.coord.y,
'left': Math.random()* opts.coord.x
});
}
});
return ret;
};

$.fn.tagcloud.defaults = {
size: {start: 14, end: 18, unit: "pt"}
};
$.fn.tagcloud.defaults = {
size : {
start : 14,
end : 18,
unit : "pt"
},
color: {
start: '#cde',
end: '#f52'
},
coord: {
x: 340,
y: 270
}
};

})(jQuery);