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-rw-r--r--util/human/io.lua28
1 files changed, 21 insertions, 7 deletions
diff --git a/util/human/io.lua b/util/human/io.lua
index 09ed2807..83a521c3 100644
--- a/util/human/io.lua
+++ b/util/human/io.lua
@@ -1,5 +1,9 @@
local array = require "util.array";
-local utf8 = rawget(_G,"utf8") or require"util.encodings".utf8;
+local utf8 = rawget(_G, "utf8") or require"util.encodings".utf8;
+local len = utf8.len or function(s)
+ local _, count = s:gsub("[%z\001-\127\194-\253][\128-\191]*", "");
+ return count;
+end;
local function getchar(n)
local stty_ret = os.execute("stty raw -echo 2>/dev/null");
@@ -96,11 +100,21 @@ local function padleft(s, width)
return string.rep(" ", width-#s)..s;
end
+local pat = "[%z\001-\127\194-\253][\128-\191]*";
+local function utf8_cut(s, pos)
+ return s:match("^"..pat:rep(pos)) or s;
+end
+
+if utf8.len and utf8.offset then
+ function utf8_cut(s, pos)
+ return s:sub(1, utf8.offset(s, pos+1)-1);
+ end
+end
+
local function ellipsis(s, width)
- if #s <= width then return s; end
- s = s:sub(1, width - 1)
- while not utf8.len(s) do s = s:sub(1, -2); end
- return s .. "…";
+ if len(s) <= width then return s; end
+ if width == 1 then return "…"; end
+ return utf8_cut(s, width - 1) .. "…";
end
local function new_table(col_specs, max_width)
@@ -148,13 +162,13 @@ local function new_table(col_specs, max_width)
else
v = tostring(v);
end
- if #v < width then
+ if len(v) < width then
if column.align == "right" then
v = padleft(v, width);
else
v = padright(v, width);
end
- elseif #v > width then
+ elseif len(v) > width then
v = ellipsis(v, width);
end
table.insert(output, v);