Escape control characters in Table Viewer

Similar behaviour to old tv.
Objects in tables supposed to be printed in a single line
and it looks ugly when a [...,10,...] integer list
creates a new-line.

1 files changed, 19 insertions, 1 deletions

diff --git a/lib/observer/src/observer_tv_table.erl b/lib/observer/src/observer_tv_table.erl
index d339a853cb..97d18ec03c 100644
--- a/lib/observer/src/observer_tv_table.erl
+++ b/lib/observer/src/observer_tv_table.erl
@@ -762,7 +762,7 @@ format_tuple(_Tuple, 1, 0) ->
 format_list([]) -> "[]";
 format_list(List) ->
     case printable_list(List) of
-	true ->  io_lib:format("\"~ts\"", [List]);
+	true ->  io_lib:format("\"~ts\"", [map_printable_list(List)]);
 	false -> [$[ | make_list(List)]
     end.
 
@@ -771,6 +771,24 @@ make_list([Last]) ->
 make_list([Head|Tail]) ->
     [format(Head), $,|make_list(Tail)].
 
+map_printable_list([$\n|Cs]) ->
+    [$\\, $n|map_printable_list(Cs)];
+map_printable_list([$\r|Cs]) ->
+    [$\\, $r|map_printable_list(Cs)];
+map_printable_list([$\t|Cs]) ->
+    [$\\, $t|map_printable_list(Cs)];
+map_printable_list([$\v|Cs]) ->
+    [$\\, $v|map_printable_list(Cs)];
+map_printable_list([$\b|Cs]) ->
+    [$\\, $b|map_printable_list(Cs)];
+map_printable_list([$\f|Cs]) ->
+    [$\\, $f|map_printable_list(Cs)];
+map_printable_list([$\e|Cs]) ->
+    [$\\, $e|map_printable_list(Cs)];
+map_printable_list([]) -> [];
+map_printable_list([C|Cs]) ->
+    [C|map_printable_list(Cs)].
+
 %% printable_list([Char]) -> bool()
 %%  Return true if CharList is a list of printable characters, else
 %%  false.