OC-PsychOS2/lib/vtansi.lua

211 lines
5.0 KiB
Lua

local vtansi = {}
vtansi.sequences = {
[28] = "\n", -- newline
[200] = "\27[A", -- up
[203] = "\27[D", -- left
[205] = "\27[C", -- right
[208] = "\27[B", -- down
[201] = "\27[5~", -- page up
[209] = "\27[6~" -- page down
}
function vtansi.vtemu(gpu) -- table -- function -- takes GPU component proxy *gpu* and returns a function to write to it in a manner like an ANSI terminal
local colours = {0x0,0xFF0000,0x00FF00,0xFFFF00,0x0000FF,0xFF00FF,0x00B6FF,0xFFFFFF}
local mx, my = gpu.maxResolution()
local cx, cy = 1, 1
local pc = " "
local lc = ""
local mode = 0 -- 0 normal, 1 escape, 2 command
local lw = true
local sx, sy = 1,1
local cs = ""
local bg, fg = 0, 0xFFFFFF
-- setup
gpu.setResolution(mx,my)
gpu.fill(1,1,mx,my," ")
local function checkCursor()
if cx > mx and lw then
cx, cy = 1, cy+1
end
if cy > my then
gpu.copy(1,2,mx,my-1,0,-1)
gpu.fill(1,my,mx,1," ")
cy=my
end
if cy < 1 then cy = 1 end
if cx < 1 then cx = 1 end
end
local function termwrite(s)
local wb = ""
local lb, ec = nil, nil
local function flushwb()
while wb:len() > 0 do
checkCursor()
local wl = wb:sub(1,mx-cx+1)
wb = wb:sub(wl:len()+1)
gpu.set(cx, cy, wl)
cx = cx + wl:len()
end
end
local rs = ""
s=s:gsub("\8","\27[D")
pc = gpu.get(cx,cy)
gpu.setForeground(fg)
gpu.setBackground(bg)
gpu.set(cx,cy,pc)
for cc in s:gmatch(".") do
if mode == 0 then
if cc == "\n" then
flushwb()
cx,cy = 1, cy+1
checkCursor()
elseif cc == "\t" then
wb=wb..(" "):rep(8*((cx+9)//8))
elseif cc == "\27" then
flushwb()
mode = 1
else
wb = wb .. cc
end
elseif mode == 1 then
if cc == "[" then
mode = 2
else
mode = 0
end
elseif mode == 2 then
if cc:match("[%d;]") then
cs = cs .. cc
else
mode = 0
local tA = {}
for s in cs:gmatch("%d+") do
tA[#tA+1] = tonumber(s)
end
if cc == "H" then
cx, cy = math.min(mx,tA[1] or 1), math.min(my,tA[2] or 1)
elseif cc == "A" then
for i = 1, (tA[1] or 1) do
cy = cy - 1
checkCursor()
end
elseif cc == "B" then
for i = 1, (tA[1] or 1) do
cy = cy + 1
checkCursor()
end
elseif cc == "C" then
for i = 1, (tA[1] or 1) do
cx = cx + 1
checkCursor()
end
elseif cc == "D" then
for i = 1, (tA[1] or 1) do
cx = cx - 1
checkCursor()
end
elseif cc == "s" then
sx, sy = cx, cy
elseif cc == "u" then
cx, cy = sx, sy
elseif cc == "n" and tA[1] == 6 then
rs = string.format("%s\27[%d;%dR",rs,cx,cy)
dprint(string.format("reporting %d;%d as current cursor position",cx,cy))
elseif cc == "K" and tA[1] == 1 then
gpu.fill(1,cy,cx,1," ")
elseif cc == "K" and tA[1] == 2 then
gpu.fill(cx,cy,mx,1," ")
elseif cc == "K" then
gpu.fill(1,cy,mx,1," ")
elseif cc == "J" and tA[1] == 1 then
gpu.fill(1,1,mx,cy," ")
elseif cc == "J" and tA[1] == 2 then
gpu.fill(1,1,mx,my," ")
cx, cy = 1, 1
elseif cc == "J" then
gpu.fill(1,cy,mx,my," ")
elseif cc == "m" then
for _,num in ipairs(tA) do
if num == 0 then
fg,bg,ec,lb = 0xFFFFFF,0,false,true
elseif num == 7 then
local nfg,nbg = bg, fg
fg, bg = nfg, nbg
elseif num > 29 and num < 38 then
fg = colours[num-29]
elseif num > 39 and num < 48 then
bg = colours[num-39]
elseif num == 100 or num == 8 then -- disable local echo
ec = false
elseif num == 101 then -- disable line mode
lb = false
end
end
gpu.setForeground(fg)
gpu.setBackground(bg)
end
cs = ""
checkCursor()
end
end
end
flushwb()
checkCursor()
pc = gpu.get(cx,cy)
gpu.setForeground(bg)
gpu.setBackground(fg)
gpu.set(cx,cy,pc)
gpu.setForeground(fg)
gpu.setBackground(bg)
return rs, lb, ec
end
return termwrite
end
function vtansi.vtsession(gpua,scra) -- string string -- table -- creates a process to handle the GPU and screen address combination *gpua*/*scra*. Returns read, write and "close" functions.
local gpu = component.proxy(gpua)
gpu.bind(scra)
local write = vtansi.vtemu(gpu)
local kba = {}
for k,v in ipairs(component.invoke(scra,"getKeyboards")) do
kba[v]=true
end
local buf, lbuf, echo = "", false, false
os.spawn(function()
while true do
local ty,ka,ch,kc = coroutine.yield()
if ty == "key_down" and kba[ka] then
local outs
if ch > 0 then
outs = string.char(ch)
end
outs = vtansi.sequences[kc] or outs
if outs then
if echo then write(outs) end
buf=buf..outs
end
end
end
end,string.format("ttyd[%s:%s]",gpua:sub(1,8),scra:sub(1,8)))
local function bread(n)
coroutine.yield()
local r = buf
buf = ""
return r
end
local function bwrite(d)
local ba, lb, ec = write(d)
buf = buf .. ba
if lb ~= nil then
lbuf = lb
end
if ec ~= nil then
echo = ec
end
end
return bread, bwrite, function() io.write("\27[2J\27[H") end
end
return vtansi