349 lines
11 KiB
Lua
349 lines
11 KiB
Lua
local file = ...
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local fs = require("filesystem")
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local event = require("event")
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local component = require("component")
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local unicode = require("unicode")
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local workingDirectory = require("shell").getWorkingDirectory()
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local gpu = component.gpu
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local width, height = gpu.getResolution()
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local scrollPosX, scrollPosY = 1, 1
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local cursorPosX, cursorPosY = 1, 1
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local cursorWhite = true
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local changesMade = false
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local renderBuffer = gpu.allocateBuffer()
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local scrollSpeed = 5
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local tab = " "
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--local ocelot = component.ocelot
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local function rawset(x, y, text)
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terminal.write("\x1b[".. tostring(y) .. ";" .. tostring(x) .. "H" .. text)
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end
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local filestring, filepath, handle, data, tmpdata
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if file then
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if file:sub(1, 1) == "/" then
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filepath = file
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else
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filepath = workingDirectory .. file
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end
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handle, data, tmpdata = fs.open(filepath, "r"), "", nil
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if fs.exists(filepath) then
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filestring = filepath
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repeat
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tmpdata = handle:read(math.huge)
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data = data .. (tmpdata or "")
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until not tmpdata
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tmpdata = {}
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if data:gmatch("(.-)\n")() then
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for line in data:gmatch("(.-)\n") do
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local newLine = line:gsub("\r", "") -- this took me SO LONG TO FIGURE OUT AAAAAAAA I HATE CRLF I HATE CRLF I HATE CRLF
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table.insert(tmpdata, newLine)
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end
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else
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tmpdata = {data}
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end
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else
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filepath = workingDirectory .. file
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filestring = "[NEW FILE]"
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tmpdata = {""}
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end
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else
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filepath = ""
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filestring = "[NEW FILE]"
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tmpdata = {""}
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end
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local function render()
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gpu.setActiveBuffer(renderBuffer)
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terminal.clear()
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--ocelot.log(tostring(scrollPosY))
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local realCursorX = math.min(cursorPosX, unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 2)
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if realCursorX < 1 then
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scrollPosX = scrollPosX + realCursorX - 1
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cursorPosX = 1
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realCursorX = math.min(cursorPosX, unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 2)
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end
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for i = scrollPosY, height + scrollPosY - 3 do
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gpu.set(1, i - scrollPosY + 1, (tmpdata[i] or ""):sub(scrollPosX))
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end
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rawset(1, height - 1, "\27[107m\27[30m" .. filestring .. string.rep(" ", width))
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rawset(1, height, "\27[107m\27[30m^X\27[0m Exit \27[107m\27[30m^S\27[0m Save" .. string.rep(" ", width))
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local char = gpu.get(realCursorX, cursorPosY)
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if cursorWhite then
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gpu.setForeground(0)
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gpu.setBackground(0xFFFFFF)
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end
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gpu.set(realCursorX, cursorPosY, char)
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gpu.bitblt()
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gpu.setActiveBuffer(0)
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end
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local renderFlag, cursorRenderFlag = false, false
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local function scrollUp()
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cursorPosY = cursorPosY - 1
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cursorRenderFlag = true
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cursorWhite = true
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if cursorPosY < 1 then
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renderFlag = true
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scrollPosY = scrollPosY - 1
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cursorPosY = 1
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end
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if scrollPosY < 1 then
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renderFlag = false
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scrollPosY = 1
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end
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if math.min(cursorPosX, unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 2) < 1 then
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renderFlag = true
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end
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end
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local function scrollDown()
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cursorPosY = cursorPosY + 1
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cursorRenderFlag = true
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cursorWhite = true
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if cursorPosY + scrollPosY - 1 > #tmpdata then
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renderFlag = false
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cursorPosY = #tmpdata - scrollPosY + 1
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end
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if cursorPosY > height - 2 then
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renderFlag = true
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scrollPosY = scrollPosY + 1
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cursorPosY = height - 2
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end
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if math.min(cursorPosX, unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 2) < 1 then
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renderFlag = true
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end
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end
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local function scrollLeft()
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cursorRenderFlag = true
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cursorWhite = true
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if cursorPosX > 1 then
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if cursorPosX <= unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 2 then
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cursorPosX = cursorPosX - 1
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elseif unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 1 > 1 then
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cursorPosX = unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 1
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end
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elseif scrollPosX > 1 then
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scrollPosX = scrollPosX - 1
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renderFlag = true
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end
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if math.min(cursorPosX, unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 2) < 1 then
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renderFlag = true
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end
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end
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local function scrollRight()
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cursorRenderFlag = true
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cursorWhite = true
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if cursorPosX <= unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 1 then
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cursorPosX = cursorPosX + 1
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end
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if cursorPosX > width then
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cursorPosX = width
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scrollPosX = scrollPosX + 1
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renderFlag = true
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end
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end
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local function processEvent(args)
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renderFlag, cursorRenderFlag = false, false
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if args[1] == "key_down" then
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local keycode = args[4]
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local key = keyboard.keys[keycode]
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if keyboard.getCtrlDown() then
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return false, false, key
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end
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if key == "down" and cursorPosY < #tmpdata then
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scrollDown()
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end
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if key == "up" then
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scrollUp()
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end
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if key == "left" then
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scrollLeft()
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end
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if key == "right" then
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scrollRight()
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end
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if key == "enter" then
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changesMade = true
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renderFlag = true
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cursorWhite = true
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table.insert(tmpdata, cursorPosY + 1, tmpdata[cursorPosY + scrollPosY - 1]:sub(cursorPosX))
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tmpdata[cursorPosY + scrollPosY - 1] = tmpdata[cursorPosY + scrollPosY - 1]:sub(1, cursorPosX - 1)
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cursorPosX = 1
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cursorPosY = cursorPosY + 1
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scrollPosX = 1
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if cursorPosY > height - 2 then
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scrollPosY = scrollPosY + 1
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cursorPosY = height - 2
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end
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end
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if key == "back" then
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changesMade = true
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cursorRenderFlag = true
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cursorWhite = true
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if cursorPosX == 1 and cursorPosY + scrollPosY - 1 > 1 then
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cursorPosY = cursorPosY - 1
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if cursorPosY < 1 then
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scrollPosY = scrollPosY - 1
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cursorPosY = 1
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end
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if scrollPosY < 1 then
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scrollPosY = 1
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end
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cursorPosX = unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 2
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if cursorPosX > width then
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scrollPosX = cursorPosX - width + 1
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cursorPosX = width
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end
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tmpdata[cursorPosY + scrollPosY - 1] = tmpdata[cursorPosY + scrollPosY - 1] .. tmpdata[cursorPosY + 1]
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table.remove(tmpdata, cursorPosY + 1)
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renderFlag = true
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else
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tmpdata[cursorPosY + scrollPosY - 1] = tmpdata[cursorPosY + scrollPosY - 1]:sub(1, cursorPosX + scrollPosX - 3) .. tmpdata[cursorPosY + scrollPosY - 1]:sub(cursorPosX + scrollPosX - 1)
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cursorPosX = math.min(cursorPosX - 1, unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) + 1)
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if cursorPosX < 1 then
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cursorPosX = 1
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scrollPosX = scrollPosX - 1
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renderFlag = true
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else
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gpu.set(1, cursorPosY, tmpdata[cursorPosY + scrollPosY - 1]:sub(scrollPosX) .. " ")
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end
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end
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end
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if key == "tab" then
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changesMade = true
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cursorRenderFlag = true
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cursorWhite = true
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tmpdata[cursorPosY + scrollPosY - 1] = tmpdata[cursorPosY + scrollPosY - 1]:sub(1, cursorPosX + scrollPosX - 2) .. tab .. tmpdata[cursorPosY + scrollPosY - 1]:sub(cursorPosX + scrollPosX - 1)
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cursorPosX = cursorPosX + unicode.wlen(tab)
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if cursorPosX > width then
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scrollPosX = scrollPosX + cursorPosX - width
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cursorPosX = width
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renderFlag = true
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else
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gpu.set(1, cursorPosY, tmpdata[cursorPosY + scrollPosY - 1]:sub(scrollPosX))
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end
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end
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if args[3] >= 32 and args[3] <= 126 then
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changesMade = true
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cursorRenderFlag = true
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cursorWhite = true
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tmpdata[cursorPosY + scrollPosY - 1] = tmpdata[cursorPosY + scrollPosY - 1]:sub(1, cursorPosX + scrollPosX - 2) .. unicode.char(args[3]) .. tmpdata[cursorPosY + scrollPosY - 1]:sub(cursorPosX + scrollPosX - 1)
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cursorPosX = math.min(cursorPosX, unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1])) + 1
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--ocelot.log(tostring(cursorPosX))
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if cursorPosX > width then
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cursorPosX = width
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scrollPosX = scrollPosX + 1
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renderFlag = true
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else
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gpu.set(1, cursorPosY, tmpdata[cursorPosY + scrollPosY - 1]:sub(scrollPosX))
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end
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end
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elseif args[1] == "scroll" then
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if args[5] == 1 then
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for i = 1, scrollSpeed do
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scrollUp()
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end
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elseif args[5] == -1 and cursorPosY < #tmpdata then
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for i = 1, scrollSpeed do
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scrollDown()
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end
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end
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end
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return renderFlag, cursorRenderFlag
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end
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local function save()
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gpu.setBackground(0xFFFFFF)
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gpu.setForeground(0)
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gpu.set(1, height - 1, string.rep(" ", width))
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rawset(1, height - 1)
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local savepath = terminal.read({prefix = "\27[107m\27[30mSave location: ", defaultText = filepath})
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gpu.setBackground(0xFFFFFF)
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gpu.setForeground(0)
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if fs.exists(savepath) then
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gpu.set(1, height - 1, string.rep(" ", width))
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local answer = terminal.read({prefix = "\27[107m\27[30mFile already exists. Overwrite it? [Y/n] "})
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if answer:lower() == "n" then
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gpu.setBackground(0xFFFFFF)
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gpu.setForeground(0)
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gpu.set(1, height - 1, filestring .. string.rep(" ", width))
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return
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end
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end
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local handle, errorMessage = fs.open(savepath, "w")
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if handle then
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if table.concat(tmpdata, "\n"):sub(-1, -1) == "\n" then
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handle:write(table.concat(tmpdata, "\n"))
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else
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handle:write(table.concat(tmpdata, "\n") .. "\n") -- add a newline at the end to follow POSIX standards
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end
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handle:close()
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gpu.set(1, height - 1, filestring .. string.rep(" ", width))
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else
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gpu.set(1, height - 1, "ERROR: " .. errorMessage:gsub("\n", "") .. string.rep(" ", width))
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end
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changesMade = false
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end
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render()
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while true do
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local args = {event.pull(0.5)}
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local renderFlag, cursorRenderFlag, specialKey = false, false, nil
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local previousCursorX, previousCursorY = math.min(cursorPosX, unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 2), cursorPosY
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if args and args[1] then
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cursorWhite = true
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renderFlag, cursorRenderFlag, specialKey = processEvent(args)
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if specialKey == "x" then
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if changesMade then
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rawset(1, height - 1)
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local response = terminal.read({prefix = "\27[107m\27[30mWould you like to save changes? [Y/n] "})
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if response:lower() ~= "n" then
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save()
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end
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end
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gpu.freeAllBuffers()
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terminal.clear()
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return
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end
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if specialKey == "s" then
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save()
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end
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repeat
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args = {event.pull("key_down", 0)}
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if args and args[1] then
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processEvent(args)
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end
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until not args or not args[1]
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else
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cursorWhite = not cursorWhite
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cursorRenderFlag = true
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end
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if cursorRenderFlag then
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local char = gpu.get(previousCursorX, previousCursorY)
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gpu.set(previousCursorX, previousCursorY, char)
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local realCursorX = math.min(cursorPosX, unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 2)
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if realCursorX < 1 then
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scrollPosX = scrollPosX + realCursorX - 1
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cursorPosX = 1
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realCursorX = math.min(cursorPosX, unicode.wlen(tmpdata[cursorPosY + scrollPosY - 1]) - scrollPosX + 2)
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end
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local char = gpu.get(realCursorX, cursorPosY)
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if cursorWhite then
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gpu.setBackground(0xFFFFFF)
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gpu.setForeground(0)
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end
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gpu.set(realCursorX, cursorPosY, char)
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if cursorWhite then
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gpu.setForeground(0xFFFFFF)
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gpu.setBackground(0)
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end
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end
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if renderFlag then
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render()
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end
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end
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