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@madrobby madrobby/gist:86957
Created Mar 27, 2009

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s2.css = {
PROPERTY_MAP: {
backgroundColor: 'color',
borderBottomColor: 'color',
borderBottomWidth: 'length',
borderLeftColor: 'color',
borderLeftWidth: 'length',
borderRightColor: 'color',
borderRightWidth: 'length',
borderSpacing: 'length',
borderTopColor: 'color',
borderTopWidth: 'length',
bottom: 'length',
color: 'color',
fontSize: 'length',
fontWeight: 'integer',
height: 'length',
left: 'length',
letterSpacing: 'length',
lineHeight: 'length',
marginBottom: 'length',
marginLeft: 'length',
marginRight: 'length',
marginTop: 'length',
maxHeight: 'length',
maxWidth: 'length',
minHeight: 'length',
minWidth: 'length',
opacity: 'number',
outlineColor: 'color',
outlineOffset: 'length',
outlineWidth: 'length',
paddingBottom: 'length',
paddingLeft: 'length',
paddingRight: 'length',
paddingTop: 'length',
right: 'length',
textIndent: 'length',
top: 'length',
width: 'length',
wordSpacing: 'length',
zIndex: 'integer',
zoom: 'number'
},
LENGTH: /^(([\+\-]?[0-9\.]+)(em|ex|px|in|cm|mm|pt|pc|\%))|0$/,
NUMBER: /([\+-]*\d+\.?\d*)/,
__parseStyleElement: document.createElement('div'),
parseStyle: function(styleString) {
s2.css.__parseStyleElement.innerHTML = '<div style="' + styleString + '"></div>';
var style = s2.css.__parseStyleElement.childNodes[0].style, styleRules = {};
s2.css.NUMERIC_PROPERTIES.each( function(property){
if (style[property]) styleRules[property] = style[property];
});
s2.css.COLOR_PROPERTIES.each( function(property){
if (style[property]) styleRules[property] = s2.css.colorFromString(style[property]);
});
if (Prototype.Browser.IE && styleString.include('opacity'))
styleRules.opacity = styleString.match(/opacity:\s*((?:0|1)?(?:\.\d*)?)/)[1];
return styleRules;
},
normalizeColor: function(color) {
if (!color || ['rgba(0, 0, 0, 0)','transparent'].include(color)) color = '#ffffff';
color = s2.css.colorFromString(color);
return [0,1,2].map(function(i){ return parseInt(color.slice(i*2+1,i*2+3), 16) });
},
colorFromString: function(color) {
var value = '#', cols, i;
if (color.slice(0,4) == 'rgb(') {
cols = color.slice(4,color.length-1).split(',');
i=0; do { value += parseInt(cols[i]).toColorPart() } while (++i<3);
} else {
if (color.slice(0,1) == '#') {
if (color.length==4) for(i=1;i<4;i++) value += (color.charAt(i) + color.charAt(i)).toLowerCase();
if (color.length==7) value = color.toLowerCase();
}
}
return (value.length==7 ? value : (arguments[1] || value));
},
interpolateColor: function(from, to, position){
from = s2.css.normalizeColor(from);
to = s2.css.normalizeColor(to);
return '#' + [0,1,2].map(function(index){
return Math.max(Math.min(from[index].tween(to[index], position).round(), 255), 0).toColorPart();
}).join('');
},
interpolateNumber: function(from, to, position){
return (from||0).tween(to, position);
},
interpolateLength: function(from, to, position){
if(!from) from = '0'+to.gsub(s2.css.NUMBER,'');
to.scan(s2.css.NUMBER, function(match){ to = parseFloat(match[1]); });
return from.gsub(s2.css.NUMBER, function(match){
return parseFloat(match[1]).tween(to, position).toString();
});
},
interpolatePercentage: function(from, to, position){
return s2.css.interpolateLength(from, to, position);
},
interpolateInteger: function(from, to, position){
return from.tween(to, position).round();
},
interpolate: function(property, from, to, position){
return s2.css['interpolate'+s2.css.PROPERTY_MAP[property.camelize()].capitalize()](from, to, position);
},
ElementMethods: {
getStyles: function(element) {
var css = document.defaultView.getComputedStyle($(element), null);
return s2.css.PROPERTIES.inject({ }, function(styles, property) {
styles[property] = css[property];
return styles;
});
}
}
};
s2.css.PROPERTIES = [];
for(property in s2.css.PROPERTY_MAP) s2.css.PROPERTIES.push(property);
s2.css.NUMERIC_PROPERTIES = s2.css.PROPERTIES.findAll(function(property){ return !property.endsWith('olor') });
s2.css.COLOR_PROPERTIES = s2.css.PROPERTIES.findAll(function(property){ return property.endsWith('olor') });
if (!(document.defaultView && document.defaultView.getComputedStyle)) {
s2.css.ElementMethods.getStyles = function(element) {
element = $(element);
var css = element.currentStyle, styles;
styles = s2.css.PROPERTIES.inject({ }, function(hash, property) {
hash[property] = css[property];
return hash;
});
if (!styles.opacity) styles.opacity = element.getOpacity();
return styles;
};
};
Element.addMethods(s2.css.ElementMethods);
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