draw_editor_border = function()
	App.color(Border_color)
	local x1 = Current_pane.editor_state.left-5-Line_number_padding
	local y1 = Current_pane.editor_state.top-5
	local x2 = Current_pane.editor_state.right+5
	local y2 = Current_pane.editor_state.bottom+5
	-- upper border
	if Current_pane.filename then
		-- title in between if it exists
		local old_font = love.graphics.getFont()
		if Title_font == nil then
			Title_font = love.graphics.newFont(15)  -- 20 pixels between menu and upper border - 5
		end
		love.graphics.setFont(Title_font)
		local tx1 = Current_pane.editor_state.left
		local tx2 = tx1 + App.width(Current_pane.filename)
		love.graphics.print(Current_pane.filename, tx1, y1-15+5)
		love.graphics.setFont(old_font)
		love.graphics.line(x1,y1, tx1-5,y1)
		love.graphics.line(math.min(tx2+5,x2), y1, x2,y1)
	else
		love.graphics.line(x1,y1, x2,y1)
	end
	love.graphics.line(x1,y1, x1,y1+10)
	love.graphics.line(x2,y1, x2,y1+10)
	-- lower border
	love.graphics.line(x1,y2, x2,y2)
	love.graphics.line(x1,y2, x1,y2-10)
	love.graphics.line(x2,y2, x2,y2-10)
end