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Rewrote push_text to handle utf8 and avoid crashes

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This commit is contained in:
Pierre-Yves Rollo 2018-12-07 15:57:51 +01:00
parent 0cbffd0753
commit fc8040ff38
1 changed files with 25 additions and 10 deletions
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35
functions.lua
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@ -47,16 +47,31 @@ end
local function push_text(lines, text, maxlines, maxcolumns)
local pos = 1
repeat
local found = text:find("\n", pos) or #text + 1
local line = text:sub(pos, found - 1)
for index = 1, math.ceil(line:len() / maxcolumns) do
local part = line:sub((index-1)*maxcolumns+1, index*maxcolumns)
push_line(lines, part, maxlines)
end
pos = found + 1
until (pos > (#text + 1))
end
local column = 0
local start = 1
while pos <= #text do
local b = text:byte(pos)
column = column + 1
if b == 0x0A then
push_line(lines, text:sub(start, pos - 1), maxlines)
start = pos + 1
column = 0
end
if column > maxcolumns then
push_line(lines, text:sub(start, pos - 1), maxlines)
start = pos
column = 1
end
if b < 0x80 then pos = pos + 1
elseif b >= 0xF0 then pos = pos + 4
elseif b >= 0xE0 then pos = pos + 3
elseif b >= 0xC2 then pos = pos + 2
else pos = pos + 1 end-- Invalid char
end
if pos - 1 > start then
push_line(lines, text:sub(start, pos - 1), maxlines)
end
end
function digimons.push_text_on_screen(pos, text)
local lines = get_lines(pos)