/*
 * Farbtastic Color Picker 1.2
 * © 2008 Steven Wittens
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
jQuery.fn.farbtastic=function(callback){$.farbtastic(this,callback);return this};jQuery.farbtastic=function(container,callback){var container=$(container).get(0);return container.farbtastic||(container.farbtastic=new jQuery._farbtastic(container,callback))};jQuery._farbtastic=function(container,callback){var fb=this;$(container).html('<div class="farbtastic"><div class="color"></div><div class="wheel"></div><div class="overlay"></div><div class="h-marker marker"></div><div class="sl-marker marker"></div></div>');var e=$(".farbtastic",container);fb.wheel=$(".wheel",container).get(0);fb.radius=84;fb.square=100;fb.width=194;if(navigator.appVersion.match(/MSIE [0-6]\./)){$("*",e).each(function(){if(this.currentStyle.backgroundImage!="none"){var image=this.currentStyle.backgroundImage;image=this.currentStyle.backgroundImage.substring(5,image.length-2);$(this).css({backgroundImage:"none",filter:"progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=crop, src='"+image+"')"})}})}fb.linkTo=function(callback){if(typeof fb.callback=="object"){$(fb.callback).unbind("keyup",fb.updateValue)}fb.color=null;if(typeof callback=="function"){fb.callback=callback}else{if(typeof callback=="object"||typeof callback=="string"){fb.callback=$(callback);fb.callback.bind("keyup",fb.updateValue);if(fb.callback.get(0).value){fb.setColor(fb.callback.get(0).value)}}}return this};fb.updateValue=function(event){if(this.value&&this.value!=fb.color){fb.setColor(this.value)}};fb.setColor=function(color){var unpack=fb.unpack(color);if(fb.color!=color&&unpack){fb.color=color;fb.rgb=unpack;fb.hsl=fb.RGBToHSL(fb.rgb);fb.updateDisplay()}return this};fb.setHSL=function(hsl){fb.hsl=hsl;fb.rgb=fb.HSLToRGB(hsl);fb.color=fb.pack(fb.rgb);fb.updateDisplay();return this};fb.widgetCoords=function(event){var x,y;var el=event.target||event.srcElement;var reference=fb.wheel;if(typeof event.offsetX!="undefined"){var pos={x:event.offsetX,y:event.offsetY};var e=el;while(e){e.mouseX=pos.x;e.mouseY=pos.y;pos.x+=e.offsetLeft;pos.y+=e.offsetTop;e=e.offsetParent}var e=reference;var offset={x:0,y:0};while(e){if(typeof e.mouseX!="undefined"){x=e.mouseX-offset.x;y=e.mouseY-offset.y;break}offset.x+=e.offsetLeft;offset.y+=e.offsetTop;e=e.offsetParent}e=el;while(e){e.mouseX=undefined;e.mouseY=undefined;e=e.offsetParent}}else{var pos=fb.absolutePosition(reference);x=(event.pageX||0*(event.clientX+$("html").get(0).scrollLeft))-pos.x;y=(event.pageY||0*(event.clientY+$("html").get(0).scrollTop))-pos.y}return{x:x-fb.width/2,y:y-fb.width/2}};fb.mousedown=function(event){if(!document.dragging){$(document).bind("mousemove",fb.mousemove).bind("mouseup",fb.mouseup);document.dragging=true}var pos=fb.widgetCoords(event);fb.circleDrag=Math.max(Math.abs(pos.x),Math.abs(pos.y))*2>fb.square;fb.mousemove(event);return false};fb.mousemove=function(event){var pos=fb.widgetCoords(event);if(fb.circleDrag){var hue=Math.atan2(pos.x,-pos.y)/6.28;if(hue<0){hue+=1}fb.setHSL([hue,fb.hsl[1],fb.hsl[2]])}else{var sat=Math.max(0,Math.min(1,-(pos.x/fb.square)+0.5));var lum=Math.max(0,Math.min(1,-(pos.y/fb.square)+0.5));fb.setHSL([fb.hsl[0],sat,lum])}return false};fb.mouseup=function(){$(document).unbind("mousemove",fb.mousemove);$(document).unbind("mouseup",fb.mouseup);document.dragging=false};fb.updateDisplay=function(){var angle=fb.hsl[0]*6.28;$(".h-marker",e).css({left:Math.round(Math.sin(angle)*fb.radius+fb.width/2)+"px",top:Math.round(-Math.cos(angle)*fb.radius+fb.width/2)+"px"});$(".sl-marker",e).css({left:Math.round(fb.square*(0.5-fb.hsl[1])+fb.width/2)+"px",top:Math.round(fb.square*(0.5-fb.hsl[2])+fb.width/2)+"px"});$(".color",e).css("backgroundColor",fb.pack(fb.HSLToRGB([fb.hsl[0],1,0.5])));if(typeof fb.callback=="object"){$(fb.callback).css({backgroundColor:fb.color,color:fb.hsl[2]>0.5?"#000":"#fff"});$(fb.callback).each(function(){if(this.value&&this.value!=fb.color){this.value=fb.color}})}else{if(typeof fb.callback=="function"){fb.callback.call(fb,fb.color)}}};fb.absolutePosition=function(el){var r={x:el.offsetLeft,y:el.offsetTop};if(el.offsetParent){var tmp=fb.absolutePosition(el.offsetParent);r.x+=tmp.x;r.y+=tmp.y}return r};fb.pack=function(rgb){var r=Math.round(rgb[0]*255);var g=Math.round(rgb[1]*255);var b=Math.round(rgb[2]*255);return"#"+(r<16?"0":"")+r.toString(16)+(g<16?"0":"")+g.toString(16)+(b<16?"0":"")+b.toString(16)};fb.unpack=function(color){if(color.length==7){return[parseInt("0x"+color.substring(1,3))/255,parseInt("0x"+color.substring(3,5))/255,parseInt("0x"+color.substring(5,7))/255]}else{if(color.length==4){return[parseInt("0x"+color.substring(1,2))/15,parseInt("0x"+color.substring(2,3))/15,parseInt("0x"+color.substring(3,4))/15]}}};fb.HSLToRGB=function(hsl){var m1,m2,r,g,b;var h=hsl[0],s=hsl[1],l=hsl[2];m2=(l<=0.5)?l*(s+1):l+s-l*s;m1=l*2-m2;return[this.hueToRGB(m1,m2,h+0.33333),this.hueToRGB(m1,m2,h),this.hueToRGB(m1,m2,h-0.33333)]};fb.hueToRGB=function(m1,m2,h){h=(h<0)?h+1:((h>1)?h-1:h);if(h*6<1){return m1+(m2-m1)*h*6}if(h*2<1){return m2}if(h*3<2){return m1+(m2-m1)*(0.66666-h)*6}return m1};fb.RGBToHSL=function(rgb){var min,max,delta,h,s,l;var r=rgb[0],g=rgb[1],b=rgb[2];min=Math.min(r,Math.min(g,b));max=Math.max(r,Math.max(g,b));delta=max-min;l=(min+max)/2;s=0;if(l>0&&l<1){s=delta/(l<0.5?(2*l):(2-2*l))}h=0;if(delta>0){if(max==r&&max!=g){h+=(g-b)/delta}if(max==g&&max!=b){h+=(2+(b-r)/delta)}if(max==b&&max!=r){h+=(4+(r-g)/delta)}h/=6}return[h,s,l]};$("*",e).mousedown(fb.mousedown);fb.setColor("#000000");if(callback){fb.linkTo(callback)}};