Implements @import for sprite-maps
        Imports magic sprite map directories

def _do_magic_import(self, rule, p_selectors, p_parents, p_children, scope, media, c_lineno, c_property, c_codestr, code, name):
        """
        Implements @import for sprite-maps
        Imports magic sprite map directories
        """
        if callable(STATIC_ROOT):
            files = sorted(STATIC_ROOT(name))
        else:
            glob_path = os.path.join(STATIC_ROOT, name)
            files = glob.glob(glob_path)
            files = sorted((file[len(STATIC_ROOT):], None) for file in files)

        if files:
            # Build magic context
            map_name = os.path.normpath(
                os.path.dirname(name)).replace('\\', '_').replace('/', '_')
            kwargs = {}

            def setdefault(var, val):
                _var = '$' + map_name + '-' + var
                if _var in rule[CONTEXT]:
                    kwargs[var] = interpolate(rule[CONTEXT][_var], rule)
                else:
                    rule[CONTEXT][_var] = val
                    kwargs[var] = interpolate(val, rule)
                return rule[CONTEXT][_var]

            setdefault(
                'sprite-base-class', StringValue('.' + map_name + '-sprite'))
            setdefault('sprite-dimensions', BooleanValue(False))
            position = setdefault('position', NumberValue(0, '%'))
            spacing = setdefault('spacing', NumberValue(0))
            repeat = setdefault('repeat', StringValue('no-repeat'))
            names = tuple(os.path.splitext(
                os.path.basename(file))[0] for file, storage in files)
            for n in names:
                setdefault(n + '-position', position)
                setdefault(n + '-spacing', spacing)
                setdefault(n + '-repeat', repeat)
            sprite_map = _sprite_map(name, **kwargs)
            rule[CONTEXT]['$' + map_name + '-' + 'sprites'] = sprite_map
            ret = '''
                @import "compass/utilities/sprites/base";

                // All sprites should extend this class
                // The %(map_name)s-sprite mixin will do so for you.
                #{$%(map_name)s-sprite-base-class} {
                    background: $%(map_name)s-sprites;
                }

                // Use this to set the dimensions of an element
                // based on the size of the original image.
                @mixin %(map_name)s-sprite-dimensions($name) {
                    @include sprite-dimensions($%(map_name)s-sprites, $name);
                }

                // Move the background position to display the sprite.
                @mixin %(map_name)s-sprite-position($name, $offset-x: 0, $offset-y: 0) {
                    @include sprite-position($%(map_name)s-sprites, $name, $offset-x, $offset-y);
                }

                // Extends the sprite base class and set the background position for the desired sprite.
                // It will also apply the image dimensions if $dimensions is true.
                @mixin %(map_name)s-sprite($name, $dimensions: $%(map_name)s-sprite-dimensions, $offset-x: 0, $offset-y: 0) {
                    @extend #{$%(map_name)s-sprite-base-class};
                    @include sprite($%(map_name)s-sprites, $name, $dimensions, $offset-x, $offset-y);
                }

                @mixin %(map_name)s-sprites($sprite-names, $dimensions: $%(map_name)s-sprite-dimensions) {
                    @include sprites($%(map_name)s-sprites, $sprite-names, $%(map_name)s-sprite-base-class, $dimensions);
                }

                // Generates a class for each sprited image.
                @mixin all-%(map_name)s-sprites($dimensions: $%(map_name)s-sprite-dimensions) {
                    @include %(map_name)s-sprites(%(sprites)s, $dimensions);
                }
            ''' % {'map_name': map_name, 'sprites': ' '.join(names)}
            return ret