91 lines
2.5 KiB
JavaScript
91 lines
2.5 KiB
JavaScript
// @name The Fade Anything Technique
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// @namespace http://www.axentric.com/aside/fat/
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// @version 1.0-RC1
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// @author Adam Michela
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var Fat = {
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make_hex : function (r,g,b)
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{
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r = r.toString(16); if (r.length == 1) r = '0' + r;
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g = g.toString(16); if (g.length == 1) g = '0' + g;
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b = b.toString(16); if (b.length == 1) b = '0' + b;
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return "#" + r + g + b;
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},
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fade_all : function (dur)
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{
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var a = document.getElementsByTagName("*");
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for (var i = 0; i < a.length; i++)
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{
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var o = a[i];
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var r = /fade-?(\w{3,6})?/.exec(o.className);
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if (r)
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{
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if (!r[1]) r[1] = "";
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if (o.id) Fat.fade_element(o.id,null,dur,"#"+r[1]);
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}
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}
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},
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fade_element : function (id, fps, duration, from, to)
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{
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if (!fps) fps = 30;
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if (!duration) duration = 3000;
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if (!from || from=="#") from = "#FFFF33";
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if (!to) to = this.get_bgcolor(id);
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var frames = Math.round(fps * (duration / 1000));
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var interval = duration / frames;
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var delay = interval;
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var frame = 0;
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if (from.length < 7) from += from.substr(1,3);
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if (to.length < 7) to += to.substr(1,3);
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var rf = parseInt(from.substr(1,2),16);
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var gf = parseInt(from.substr(3,2),16);
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var bf = parseInt(from.substr(5,2),16);
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var rt = parseInt(to.substr(1,2),16);
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var gt = parseInt(to.substr(3,2),16);
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var bt = parseInt(to.substr(5,2),16);
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var r,g,b,h;
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while (frame < frames)
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{
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r = Math.floor(rf * ((frames-frame)/frames) + rt * (frame/frames));
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g = Math.floor(gf * ((frames-frame)/frames) + gt * (frame/frames));
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b = Math.floor(bf * ((frames-frame)/frames) + bt * (frame/frames));
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h = this.make_hex(r,g,b);
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setTimeout("Fat.set_bgcolor('"+id+"','"+h+"')", delay);
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frame++;
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delay = interval * frame;
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}
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setTimeout("Fat.set_bgcolor('"+id+"','"+to+"')", delay);
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},
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set_bgcolor : function (id, c)
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{
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var o = document.getElementById(id);
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o.style.backgroundColor = c;
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},
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get_bgcolor : function (id)
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{
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var o = document.getElementById(id);
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while(o)
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{
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var c;
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if (window.getComputedStyle) c = window.getComputedStyle(o,null).getPropertyValue("background-color");
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if (o.currentStyle) c = o.currentStyle.backgroundColor;
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if ((c != "" && c != "transparent") || o.tagName == "BODY") { break; }
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o = o.parentNode;
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}
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if (c == undefined || c == "" || c == "transparent") c = "#FFFFFF";
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var rgb = c.match(/rgb\s*\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*\)/);
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if (rgb) c = this.make_hex(parseInt(rgb[1]),parseInt(rgb[2]),parseInt(rgb[3]));
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return c;
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}
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}
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addLoadEvent(function () {
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Fat.fade_all();
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});
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