Long shadow Stylus mixin

long-shadow.styl

// Stylus version of SCSS mixin from http://codepen.io/awesomephant/pen/mAxHz

long-shadow(type = 'box', base-color = rgba(#000, .2), length = 100, fadeout = true, skew = false, direction = 'right')
    shadow = ''

    if !skew || type == 'text'

        if direction == 'right'
            for i in (0..length - 1)
                shadow = shadow + i + 'px ' + i + 'px 0 ' + base-color + ','

        else if direction == 'left'

            for i in (0..length - 1)
                shadow = shadow + i * -1 + 'px ' + i + 'px 0 ' + base-color + ','

    if fadeout
        for i in (0..length - 1)

            if type == 'text' || !skew

                if direction == 'right'
                    shadow = shadow + i + 'px ' + i + 'px 0 ' + rgba(base-color, 1 - i / length) + ','
                else if direction == 'left'
                    shadow = shadow + i * -1 + 'px ' + i + 'px 0 ' + rgba(base-color, 1 - i / length) + ','

            else if type == 'box' && skew

                if direction == 'right'
                    shadow = shadow + i + 'px ' + i + 'px 0 ' + i * .2 + 'px ' + rgba(base-color, 1 - i / length) + ','
                else if direction == 'left'
                    shadow = shadow + i * -1 + 'px ' + i + 'px 0 ' + i * .2 + 'px ' + rgba(base-color, 1 - i / length) + ','

    shadow = shadow + length + 'px ' + length + 'px 0 ' + rgba(base-color, 0)

    if fadeout == false

        if skew == true && type == 'box'

            for i in (0..length - 1)
                shadow = shadow + i + 'px ' + i + 'px 0 ' + i * .1 + 'px ' + base-color + ','

        shadow = shadow + length + 'px ' + length + 'px 0 ' + rgba(0, 0, 0, 0)

    shadow = unquote(shadow)

    if type == 'box'
        box-shadow: shadow

    if type == 'text'
        text-shadow: shadow