274 lines
7.2 KiB
Lua
274 lines
7.2 KiB
Lua
local vtansi = {}
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local keyboardIgnore = {}
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vtansi.activeBuffers = {}
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vtansi.sequences = {
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[28] = "\n", -- newline
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[200] = "\27[A", -- up
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[203] = "\27[D", -- left
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[205] = "\27[C", -- right
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[208] = "\27[B", -- down
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[201] = "\27[5~", -- page up
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[209] = "\27[6~" -- page down
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}
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vtansi.keys = {}
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vtansi.keys[0x38] = "lalt"
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vtansi.keys[0xB8] = "ralt"
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function vtansi.saveToBuffer(gpu,idx)
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gpu.bitblt(idx, nil, nil, nil, nil, 0)
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end
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function vtansi.loadFromBuffer(gpu,idx)
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gpu.bitblt(0, nil, nil, nil, nil, idx)
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end
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function vtansi.switchToBuffer(gpu,idx)
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-- copy screen to the active buffer
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vtansi.saveToBuffer(gpu,vtansi.activeBuffers[gpu.address])
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-- copy the new buffer to the screen
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vtansi.loadFromBuffer(gpu,idx)
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vtansi.activeBuffers[gpu.address] = idx
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end
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function vtansi.vtemu(gpu,bn) -- table number -- function -- takes GPU component proxy *gpu* and returns a function to write to it in a manner like an ANSI terminal, either allocating a new buffer or using *bn*.
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local colours = {0x0,0xFF0000,0x00FF00,0xFFFF00,0x0000FF,0xFF00FF,0x00B6FF,0xFFFFFF}
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local mx, my = gpu.maxResolution()
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local buffer = nil
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local cx, cy = 1, 1
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local pc = " "
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local lc = ""
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local mode = 0 -- 0 normal, 1 escape, 2 command
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local lw = true
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local sx, sy = 1,1
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local cs = ""
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local bg, fg = 0, 0xFFFFFF
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-- setup
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if gpu.getActiveBuffer then
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buffer = bn or gpu.allocateBuffer(mx,my)
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vtansi.activeBuffers[gpu.address] = vtansi.activeBuffers[gpu.address] or buffer
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local oldActiveBuffer = vtansi.activeBuffers[gpu.address]
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gpu.setActiveBuffer(buffer)
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gpu.setResolution(mx,my)
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gpu.fill(1,1,mx,my," ")
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gpu.setActiveBuffer(oldActiveBuffer)
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else
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gpu.setResolution(mx,my)
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gpu.fill(1,1,mx,my," ")
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end
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local function checkCursor()
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if cx > mx and lw then
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cx, cy = 1, cy+1
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end
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if cy > my then
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gpu.copy(1,2,mx,my-1,0,-1)
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gpu.fill(1,my,mx,1," ")
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cy=my
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end
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if cy < 1 then cy = 1 end
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if cx < 1 then cx = 1 end
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end
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local function termwrite(s)
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if buffer then
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if vtansi.activeBuffers[gpu.address] == buffer then
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gpu.setActiveBuffer(0)
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else
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gpu.setActiveBuffer(buffer)
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end
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end
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local wb = ""
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local lb, ec = nil, nil
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local function flushwb()
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while wb:len() > 0 do
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checkCursor()
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local wl = wb:sub(1,mx-cx+1)
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wb = wb:sub(wl:len()+1)
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gpu.set(cx, cy, wl)
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cx = cx + wl:len()
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end
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end
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local rs = ""
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s=s:gsub("\8","\27[D")
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pc = gpu.get(cx,cy)
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gpu.setForeground(fg)
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gpu.setBackground(bg)
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gpu.set(cx,cy,pc)
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for cc in s:gmatch(".") do
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if mode == 0 then
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if cc == "\n" then
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flushwb()
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cx,cy = 1, cy+1
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checkCursor()
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elseif cc == "\t" then
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wb=wb..(" "):rep((((cx//8)+1) * 8) - cx + 1)
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elseif cc == "\27" then
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flushwb()
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mode = 1
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else
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wb = wb .. cc
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end
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elseif mode == 1 then
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if cc == "[" then
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mode = 2
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else
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mode = 0
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end
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elseif mode == 2 then
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if cc:match("[%d;]") then
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cs = cs .. cc
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else
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mode = 0
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local tA = {}
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for s in cs:gmatch("%d+") do
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tA[#tA+1] = tonumber(s)
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end
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if cc == "H" then
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cx, cy = math.min(mx,tA[1] or 1), math.min(my,tA[2] or 1)
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elseif cc == "A" then
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for i = 1, (tA[1] or 1) do
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cy = cy - 1
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checkCursor()
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end
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elseif cc == "B" then
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for i = 1, (tA[1] or 1) do
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cy = cy + 1
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checkCursor()
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end
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elseif cc == "C" then
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for i = 1, (tA[1] or 1) do
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cx = cx + 1
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checkCursor()
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end
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elseif cc == "D" then
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for i = 1, (tA[1] or 1) do
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cx = cx - 1
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checkCursor()
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end
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elseif cc == "s" then
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sx, sy = cx, cy
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elseif cc == "u" then
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cx, cy = sx, sy
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elseif cc == "n" and tA[1] == 6 then
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rs = string.format("%s\27[%d;%dR",rs,cx,cy)
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elseif cc == "K" and tA[1] == 1 then
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gpu.fill(1,cy,cx,1," ")
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elseif cc == "K" and tA[1] == 2 then
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gpu.fill(cx,cy,mx,1," ")
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elseif cc == "K" then
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gpu.fill(1,cy,mx,1," ")
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elseif cc == "J" and tA[1] == 1 then
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gpu.fill(1,1,mx,cy," ")
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elseif cc == "J" and tA[1] == 2 then
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gpu.fill(1,1,mx,my," ")
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cx, cy = 1, 1
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elseif cc == "J" then
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gpu.fill(1,cy,mx,my," ")
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elseif cc == "m" then
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for _,num in ipairs(tA) do
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if num == 0 then
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fg,bg,ec,lb = 0xFFFFFF,0,false,true
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elseif num == 7 then
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local nfg,nbg = bg, fg
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fg, bg = nfg, nbg
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elseif num > 29 and num < 38 then
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fg = colours[num-29]
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elseif num > 39 and num < 48 then
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bg = colours[num-39]
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elseif num == 100 or num == 8 then -- disable local echo
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ec = false
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elseif num == 101 then -- disable line mode
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lb = false
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end
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end
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gpu.setForeground(fg)
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gpu.setBackground(bg)
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end
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cs = ""
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checkCursor()
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end
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end
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end
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flushwb()
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checkCursor()
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pc = gpu.get(cx,cy)
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gpu.setForeground(bg)
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gpu.setBackground(fg)
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gpu.set(cx,cy,pc)
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gpu.setForeground(fg)
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gpu.setBackground(bg)
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return rs, lb, ec
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end
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return termwrite, buffer
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end
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function vtansi.vtsession(gpua,scra,bn) -- string string number -- function function function -- creates a process to handle the GPU and screen address combination *gpua*/*scra*, optionally using buffer number *bn* specifically. Returns read, write and "close" functions.
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local modifiers = {}
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local gpu = component.proxy(gpua)
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-- gpu.bind(scra)
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local write, bn = vtansi.vtemu(gpu,bn)
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local kba = {}
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for k,v in ipairs(component.invoke(scra,"getKeyboards")) do
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kba[v]=true
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end
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local buf, lbuf, echo = "", false, false
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os.spawn(function()
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while true do
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local ty,ka,ch,kc = coroutine.yield()
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if kba[ka] and keyboardIgnore[ka] == bn then
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keyboardIgnore[ka] = nil
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end
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if kba[ka] and vtansi.keys[kc] then
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modifiers[vtansi.keys[kc]] = ty == "key_down"
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end
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if ty == "key_down" and kba[ka] and (bn == nil or vtansi.activeBuffers[gpua] == bn) then
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if bn and ty == "key_down" and kba[ka] and ch == 46 and kc == 52 and (modifiers.lalt or modifiers.ralt) then
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-- next buffer
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local allBuffers = gpu.buffers()
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for k,v in ipairs(allBuffers) do
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if v == vtansi.activeBuffers[gpu.address] and allBuffers[k+1] and not keyboardIgnore[ka] then
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keyboardIgnore[ka] = bn
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vtansi.switchToBuffer(gpu,allBuffers[k+1])
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end
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end
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elseif bn and ty == "key_down" and kba[ka] and ch == 44 and kc == 51 and (modifiers.lalt or modifiers.ralt) then
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-- previous buffer
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local allBuffers = gpu.buffers()
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for k,v in ipairs(allBuffers) do
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if v == vtansi.activeBuffers[gpu.address] and allBuffers[k-1] and not keyboardIgnore[ka] then
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keyboardIgnore[ka] = bn
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vtansi.switchToBuffer(gpu,allBuffers[k-1])
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end
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end
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else
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local outs
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if ch > 0 then
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outs = string.char(ch)
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end
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outs = vtansi.sequences[kc] or outs
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if outs then
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if echo then write(outs) end
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buf=buf..outs
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end
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end
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end
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end
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end,string.format("ttyd[%s:%s/%i]",gpua:sub(1,8),scra:sub(1,8),tonumber(bn) or 0))
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local function bread(n)
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coroutine.yield()
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local r = buf
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buf = ""
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return r
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end
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local function bwrite(d)
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local ba, lb, ec = write(d)
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buf = buf .. ba
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if lb ~= nil then
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lbuf = lb
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end
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if ec ~= nil then
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echo = ec
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end
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end
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return bread, bwrite, function() io.write("\27[2J\27[H") end
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end
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return vtansi
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