$IE_COMPATIBILITY ?= true

fif(cond,rthen,relse)
	if cond
		rthen
	else
		relse

findBestFgColor(backgroundColor,blackColor=#333,whiteColor=#fdfdfd)
	unless backgroundColor is a 'rgba'
		error('expected a rgba, but got ' + typeof(backgroundColor))
	if backgroundColor is a 'hash'
		backgroundColor = backgroundColor[0]
	unless backgroundColor is a 'rgba'
		error('expected a rgba, but got ' + typeof(backgroundColor))
	fif lightness(backgroundColor) > 55 blackColor whiteColor
/*	fif dark(backgroundColor) blackColor whiteColor*/

isBoolean(val)
	p(val)


boxShadow($color,$blur=false,$hOffset=0,$vOffset=0,$spread=false,$inset=false)
	$color = 0 if $color == none
	if $color == 0
		box-shadow 0
	else
		if length($color) > 1
			$blur = $color[1]
			$color = $color[0]
		$full = $hOffset $vOffset
		$full = $full $blur if $blur
		$full = $full $spread if $spread
		$full = $full $color
		$full = inset $full if $inset
		box-shadow: $full
		/* http://msdn.microsoft.com/en-us/library/ms532985(v=vs.85).aspx
		@if $IE_COMPATIBILITY and  $inset==false{
			@if $hOffset==0 and $vOffset==0 and $blur{
				$max:max(-$blur/1px,$blur/1px); $min:min(-$blur/1px,$blur/1px);
				filter:
					progid:DXImageTransform.Microsoft.DropShadow(color='#{$color}', offX=#{$max}, offY=0),
					progid:DXImageTransform.Microsoft.DropShadow(color='#{$color}', offX=#{$min}, offY=0),
					progid:DXImageTransform.Microsoft.DropShadow(color='#{$color}', offX=0, offY=#{$max}),
					progid:DXImageTransform.Microsoft.DropShadow(color='#{$color}', offX=0, offY=#{$min});
			}@else{
				@if $blur{
					@if $vOffset==0{
						$max:max(-$hOffset/1px,$hOffset/1px); $min:min(-$hOffset/1px,$hOffset/1px);
						filter:
							progid:DXImageTransform.Microsoft.DropShadow(color='#{$color}', offX=#{$max}, offY=0),
							progid:DXImageTransform.Microsoft.DropShadow(color='#{$color}', offX=#{$min}, offY=0);
					}@else{
						$maxH:max(-$hOffset/1px,$hOffset/1px); $minH:min(-$hOffset/1px,$hOffset/1px);
						$maxV:max(-$vOffset/1px,$vOffset/1px); $minV:min(-$vOffset/1px,$vOffset/1px);
						filter:
							progid:DXImageTransform.Microsoft.DropShadow(color='#{$color}', offX=#{$maxH}, offY=#{$maxH}),
							progid:DXImageTransform.Microsoft.DropShadow(color='#{$color}', offX=#{$minH}, offY=#{$maxH}),
							progid:DXImageTransform.Microsoft.DropShadow(color='#{$color}', offX=#{$maxH}, offY=#{$minV}),
							progid:DXImageTransform.Microsoft.DropShadow(color='#{$color}', offX=#{$minH}, offY=#{$minV});
					}
				}@else{
					filter:progid:DXImageTransform.Microsoft.DropShadow(color='#{$color}', offX=$hOffset, offY=$vOffset);
				}
			}
		}
		*/
		/*@if $hOffset==0 and $vOffset==1px{
			// http://www.marcuspope.com/blog/Less-CSS-Mixins-for-cross-browser-styles
			filter: 
				progid:DXImageTransform.Microsoft.Shadow(color='#{$color}',direction=180,strength=4), 
				progid:DXImageTransform.Microsoft.Shadow(color='#{$color}',direction=225,strength=4), 
				progid:DXImageTransform.Microsoft.Shadow(color='#{$color}',direction=270,strength=5);
		}*/


insetBoxShadow($color,$blur=false,$hOffset=0,$vOffset=0,$spread=false)
	boxShadow $color $blur $hOffset $vOffset $spread true


borderRadiusBottom($length)
	border-bottom-right-radius $length
	border-bottom-left-radius $length

borderRadiusTop($length)
	border-top-right-radius $length
	border-top-left-radius $length

borderRadiusRight($length)
	border-top-right-radius $length
	border-bottom-right-radius $length

borderRadiusLeft($length)
	border-top-left-radius $length
	border-bottom-left-radius $length

border($color,$args...)
	if $color is a 'color'
		border: 1px solid $color $args
	else if $color is not false
		border: arguments

marginpadding($margin,$padding = true)
	margin $margin
	padding fif($padding is true,$padding,$margin)


@includeCore 'functions/backgrounds';
@includeCore 'functions/sprites';
@includeCore 'functions/compat';
@includeCore 'functions/positions';