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authorHans Bolinder <[email protected]>2017-06-20 12:27:35 +0200
committerSiri Hansen <[email protected]>2017-09-05 11:02:25 +0200
commitd9e56433f0aff84cae516486fdd7043de38f23fe (patch)
tree37261a7ad68eeda3e80fbec3b68b88f0bd41f392 /lib/stdlib/src
parent2ca6b53da655b4c1377e8ddb818ce70c71e3538e (diff)
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stdlib: Improve handling of Unicode in edlin_expand
Diffstat (limited to 'lib/stdlib/src')
-rw-r--r--lib/stdlib/src/edlin_expand.erl26
1 files changed, 15 insertions, 11 deletions
diff --git a/lib/stdlib/src/edlin_expand.erl b/lib/stdlib/src/edlin_expand.erl
index a1a97af4c5..bdcefda6e5 100644
--- a/lib/stdlib/src/edlin_expand.erl
+++ b/lib/stdlib/src/edlin_expand.erl
@@ -23,7 +23,7 @@
-export([expand/1, format_matches/1]).
--import(lists, [reverse/1, nthtail/2, prefix/2]).
+-import(lists, [reverse/1, prefix/2]).
%% expand(CurrentBefore) ->
%% {yes, Expansion, Matches} | {no, Matches}
@@ -75,15 +75,15 @@ to_atom(Str) ->
end.
match(Prefix, Alts, Extra0) ->
- Len = length(Prefix),
+ Len = string:length(Prefix),
Matches = lists:sort(
[{S, A} || {H, A} <- Alts,
- prefix(Prefix, S=hd(io_lib:fwrite("~w",[H])))]),
+ prefix(Prefix, S=flat_write(H))]),
case longest_common_head([N || {N, _} <- Matches]) of
{partial, []} ->
{no, [], Matches}; % format_matches(Matches)};
{partial, Str} ->
- case nthtail(Len, Str) of
+ case string:slice(Str, Len) of
[] ->
{yes, [], Matches}; % format_matches(Matches)};
Remain ->
@@ -94,18 +94,21 @@ match(Prefix, Alts, Extra0) ->
{"(",[{Str,0}]} -> "()";
{_,_} -> Extra0
end,
- {yes, nthtail(Len, Str) ++ Extra, []};
+ {yes, string:slice(Str, Len) ++ Extra, []};
no ->
{no, [], []}
end.
+flat_write(T) ->
+ lists:flatten(io_lib:fwrite("~tw",[T])).
+
%% Return the list of names L in multiple columns.
format_matches(L) ->
{S1, Dots} = format_col(lists:sort(L), []),
S = case Dots of
true ->
{_, Prefix} = longest_common_head(vals(L)),
- PrefixLen = length(Prefix),
+ PrefixLen = string:length(Prefix),
case PrefixLen =< 3 of
true -> S1; % Do not replace the prefix with "...".
false ->
@@ -128,7 +131,7 @@ format_col([A|T], Width, Len, Acc0, LL, Dots) ->
{H0, R} = format_val(A),
Hmax = LL - length(R),
{H, NewDots} =
- case length(H0) > Hmax of
+ case string:length(H0) > Hmax of
true -> {io_lib:format("~-*ts", [Hmax - 3, H0]) ++ "...", true};
false -> {H0, Dots}
end,
@@ -149,12 +152,12 @@ format_val(H) ->
field_width(L, LL) -> field_width(L, 0, LL).
field_width([{H,_}|T], W, LL) ->
- case length(H) of
+ case string:length(H) of
L when L > W -> field_width(T, L, LL);
_ -> field_width(T, W, LL)
end;
field_width([H|T], W, LL) ->
- case length(H) of
+ case string:length(H) of
L when L > W -> field_width(T, L, LL);
_ -> field_width(T, W, LL)
end;
@@ -169,10 +172,11 @@ vals([S|L]) -> [S|vals(L)].
leading_dots([], _Len) -> [];
leading_dots([{H, I}|L], Len) ->
- [{"..." ++ nthtail(Len, H), I}|leading_dots(L, Len)];
+ [{"..." ++ string:slice(H, Len), I}|leading_dots(L, Len)];
leading_dots([H|L], Len) ->
- ["..." ++ nthtail(Len, H)|leading_dots(L, Len)].
+ ["..." ++ string:slice(H, Len)|leading_dots(L, Len)].
+%% Strings are handled naively, but it should be OK here.
longest_common_head([]) ->
no;
longest_common_head(LL) ->