mirror of https://github.com/20kdc/OC-KittenOS.git
78 lines
2.4 KiB
Lua
78 lines
2.4 KiB
Lua
-- Copyright (C) 2018-2021 by KittenOS NEO contributors
|
|
--
|
|
-- Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.
|
|
--
|
|
-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
|
|
-- THIS SOFTWARE.
|
|
|
|
return {
|
|
-- note: everything must already be unicode.safeTextFormat'd
|
|
draw = function (sW, line, cursorX, rX)
|
|
-- if no camera, provide a default
|
|
rX = rX or math.max(1, (cursorX or 1) - math.floor(sW * 2 / 3))
|
|
-- transform into area-relative
|
|
local tl = unicode.sub(line, rX, rX + sW - 1)
|
|
-- inject cursor
|
|
if cursorX then
|
|
cursorX = (cursorX - rX) + 1
|
|
if cursorX >= 1 then
|
|
if cursorX <= sW then
|
|
tl = unicode.sub(tl, 1, cursorX - 1) .. "_" .. unicode.sub(tl, cursorX + 1)
|
|
end
|
|
end
|
|
end
|
|
return tl .. (" "):rep(sW - unicode.len(tl))
|
|
end,
|
|
clamp = function (tl, cursorX)
|
|
tl = unicode.len(tl)
|
|
if tl < cursorX - 1 then
|
|
return tl + 1
|
|
end
|
|
return cursorX
|
|
end,
|
|
-- returns line, cursorX, special
|
|
-- return values may be nil if irrelevant
|
|
key = function (ks, kc, line, cursorX)
|
|
local cS = unicode.sub(line, 1, cursorX - 1)
|
|
local cE = unicode.sub(line, cursorX)
|
|
local ll = unicode.len(line)
|
|
if kc == 203 then -- navi <
|
|
if cursorX > 1 then
|
|
return nil, cursorX - 1
|
|
else
|
|
-- cline underflow
|
|
return nil, nil, "l<"
|
|
end
|
|
elseif kc == 205 then -- navi >
|
|
if cursorX > ll then
|
|
-- cline overflow
|
|
return nil, nil, "l>"
|
|
end
|
|
return nil, cursorX + 1
|
|
elseif kc == 199 then -- home
|
|
return nil, 1
|
|
elseif kc == 207 then -- end
|
|
return nil, unicode.len(line) + 1
|
|
elseif ks == "\8" then -- del
|
|
if cursorX == 1 then
|
|
-- weld prev
|
|
return nil, nil, "w<"
|
|
else
|
|
return unicode.sub(cS, 1, unicode.len(cS) - 1) .. cE, cursorX - 1
|
|
end
|
|
elseif kc == 211 then -- del
|
|
if cursorX > ll then
|
|
return nil, nil, "w>"
|
|
end
|
|
return cS .. unicode.sub(cE, 2)
|
|
elseif ks then -- standard letters
|
|
if ks == "\r" then
|
|
-- new line
|
|
return nil, nil, "nl"
|
|
end
|
|
return cS .. ks .. cE, cursorX + unicode.len(ks)
|
|
end
|
|
-- :(
|
|
end
|
|
}
|