fix lines longer than the screen causing weird scrolling artifacts, and avoid superfluous history entries

This commit is contained in:
Izaya 2023-09-29 10:15:25 +10:00
parent 88bce6cd96
commit f83b8c999c

View File

@ -257,11 +257,20 @@ function buffer:read(...)
end
end
else
-- ?????
io.write("\27[s\27[8m")
local pos, buffer, hIndex = 1, "", 0
-- this whole thing is a house of cards. good luck.
io.write("\27[s\27[8m\27[6n")
if not (self.mx or self.my) then
io.write("\27[9999;9999H\27[6n")
end
local pos, buffer, hIndex, sx, sy = 1, "", 0
self.history = self.history or {}
local function redraw()
-- scroll until the buffer will fit on the screen
while sx and sy and self.mx and self.my and #buffer > (self.mx * ((self.my - sy) + 1)) - sx do
sy = sy - 1
io.write("\27[9999;9999H ")
io.write(string.format("\27[2K\27[%i;%iH\27[s", sx, sy))
end
io.write(string.format("\27[u%s \27[u\27[%iC",buffer,(#buffer-pos)+1))
end
while true do
@ -300,6 +309,9 @@ function buffer:read(...)
end
buffer = self.history[1+#self.history-hIndex] or buffer
pos = 1
elseif char == "R" then -- cursor position report
self.mx, self.my = sx and math.max(self.mx or 0, args[1]) or self.mx, sy and math.max(self.my or 0, args[2]) or self.my
sx, sy = sx or args[1], sy or args[2]
end
hIndex = math.max(math.min(hIndex,#self.history),0)
end
@ -321,7 +333,7 @@ function buffer:read(...)
pos = (nc and #buffer-nc+2) or 1
elseif char == "\13" or char == "\10" or char == "\n" then -- return / newline
io.write("\n")
self.history[#self.history+1] = buffer
self.history[#self.history+1] = buffer ~= "" and buffer ~= self.history[#self.history] and buffer or nil
if #self.history > (self.maxhistory or 16) then table.remove(self.history,1) end
if chop then buffer = buffer .. "\n" end
return buffer