borders.lua

-- ─  ━ │ ┃ ┄ ┅ ┆ ┇ ┈ ┉ ┊ ┋ ┌ ┍ ┎ ┏
--
-- ┐  ┑ ┒ ┓ └ ┕ ┖ ┗ ┘ ┙ ┚ ┛ ├ ┝ ┞ ┟
--
-- ┠  ┡ ┢ ┣ ┤ ┥ ┦ ┧ ┨ ┩ ┪ ┫ ┬ ┭ ┮ ┯
--
-- ┰  ┱ ┲ ┳ ┴ ┵ ┶ ┷ ┸ ┹ ┺ ┻ ┼ ┽ ┾ ┿
--
-- ╀  ╁ ╂ ╃ ╄ ╅ ╆ ╇ ╈ ╉ ╊ ╋ ╌ ╍ ╎ ╏
--
-- ═  ║ ╒ ╓ ╔ ╕ ╖ ╗ ╘ ╙ ╚ ╛ ╜ ╝ ╞ ╟
--
-- ╠  ╡ ╢ ╣ ╤ ╥ ╦ ╧ ╨ ╩ ╪ ╫ ╬
--
--  ╱ ╲ ╳ ╴ ╵ ╶ ╷ ╸ ╹ ╺ ╻ ╼ ╽ ╾ ╿

local borders = {}

borders.groups = {
    slim_round = { "╭", "╮", "╰", "╯", "│", "─", "├", "┤" },
    slim_double = { "╔", "╗", "╚", "╝", "║", "═", "╠", "╣" },
    bold = { "┏", "┓", "┗", "┛", "┃", "━", "┣", "┫" }
}

borders.draw = function(x, y, w, h, fg, bg, type, gpu)
    local b = borders.groups[type]
    gpu.setForeground(fg)
    gpu.setBackground(bg)
    gpu.set(x, y, b[1])     -- corner top left
    gpu.set(x+w, y, b[2])   -- corner top right

    for i=1,(h-2) do
        gpu.set(x, y+i, b[5])   -- frame left
        gpu.set(x+w, y+i, b[5]) -- frame right
    end

    for i=1,(w-1) do
        gpu.set(x+i, y, b[6])   -- frame top
        gpu.set(x+i, y+h-1, b[6])   -- frame bottom
    end

    gpu.set(x, y+h-1, b[3]) -- corner bottom left
    gpu.set(x+w, y+h-1, b[4]) -- corner bottom right
end

borders.addDivLine = function(x, y, w, fg, bg, type, gpu)
    local b = borders.groups[type]
    gpu.set(x, y, b[7])     -- frame left (division)
    gpu.set(x+w, y, b[8])   -- frame right (division)

    for i=1,(w-1) do
        gpu.set(x+i, y, b[6]) -- frame line
    end
end

return borders