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Fix core.wrap_text and make its behaviour consistent with the docs

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Code based on initial implementation by @dsohler.
This commit is contained in:
sfan5 2017-09-11 16:25:20 +02:00
parent 17fd5fe935
commit 6fa2f6b4aa
4 changed files with 21 additions and 53 deletions
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64
builtin/common/misc_helpers.lua
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@ -308,59 +308,25 @@ function core.formspec_escape(text)
end
function core.wrap_text(text, charlimit)
local retval = {}
local current_idx = 1
local start,stop = string_find(text, " ", current_idx)
local nl_start,nl_stop = string_find(text, "\n", current_idx)
local gotnewline = false
if nl_start ~= nil and (start == nil or nl_start < start) then
start = nl_start
stop = nl_stop
gotnewline = true
end
local last_line = ""
while start ~= nil do
if string.len(last_line) + (stop-start) > charlimit then
retval[#retval + 1] = last_line
last_line = ""
end
if last_line ~= "" then
last_line = last_line .. " "
end
last_line = last_line .. string_sub(text, current_idx, stop - 1)
if gotnewline then
retval[#retval + 1] = last_line
last_line = ""
gotnewline = false
end
current_idx = stop+1
start,stop = string_find(text, " ", current_idx)
nl_start,nl_stop = string_find(text, "\n", current_idx)
if nl_start ~= nil and (start == nil or nl_start < start) then
start = nl_start
stop = nl_stop
gotnewline = true
end
function core.wrap_text(text, max_length, as_table)
local result = {}
local line = {}
if #text <= max_length then
return as_table and {text} or text
end
--add last part of text
if string.len(last_line) + (string.len(text) - current_idx) > charlimit then
retval[#retval + 1] = last_line
retval[#retval + 1] = string_sub(text, current_idx)
else
last_line = last_line .. " " .. string_sub(text, current_idx)
retval[#retval + 1] = last_line
for word in text:gmatch('%S+') do
local cur_length = #table.concat(line, ' ')
if cur_length > 0 and cur_length + #word + 1 >= max_length then
-- word wouldn't fit on current line, move to next line
table.insert(result, table.concat(line, ' '))
line = {}
end
table.insert(line, word)
end
return retval
table.insert(result, table.concat(line, ' '))
return as_table and result or table.concat(result, '\n')
end
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