a powerline layout

local function powerline_add(self, ...)
    local colors,new_widgets, dir, count = self.colors or {
        "#0000ff",
        "#ff0000",
        "#00ff00"
    }, {...}, self.direction or "right", #self.children/2
    local ridx    = (dir=="right" and 1 or -1)

    if self.children[count] then self.children[count]:emit_signal("widget::redraw_needed") end

    for i=1, #new_widgets do
        local color = gears.color(colors[(count%#colors) + 1])
        local nextc = gears.color(colors[((count+ridx)%#colors) + 1])

        local separator = wibox.widget {
            fit = function(self,c,w,h) return h/2,h end,
            draw = function(sep, context, cr, w,h)
                local children = self:get_children()
                local is_edge = (ridx==1 and children[#children] == sep) or
                    (ridx==-1 and sep==children[1])

                if not is_edge then
                    cr:set_source(nextc)
                    cr:paint()
                end
                local begx = dir == "right" and 0 or w
                cr:move_to(begx,0)
                cr:line_to(begx==0 and w or 0,h/2)
                cr:line_to(begx, h)
                cr:close_path()
                cr:set_source(color)
                cr:fill()
            end,
            widget = wibox.widget.base.make_widget
        }

        if dir == "left"  then self:real_add(separator) end
        self:real_add(wibox.container.background(new_widgets[i],color))
        if dir == "right" then self:real_add(separator) end
        count = count + 1
    end
end

local function powerline_layout()
    local l = wibox.layout.fixed.horizontal()
    rawset(l, "real_add", l.add        )
    rawset(l, "add"     , powerline_add)
    return l
end

mywibox[s]:setup{
    awful.widget.taglist(
        w5.screen,
        awful.widget.taglist.filter.all,
        taglist_buttons,
        {
            bg_focus = gears.color.transparent,
            bg_empty = gears.color.transparent,
            bg_used  = gears.color.transparent,
        },
        nil,
        powerline_layout()
    ),
    nil,
    {
        wibox.widget.textbox "one",
        wibox.widget.textbox "two",
        wibox.widget.textbox "three",
        wibox.widget.textbox "four",
        wibox.widget.textbox "five",
        direction = "left",
        widget = powerline_layout
    },

    layout = wibox.layout.align.horizontal,
}