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line editing: add an option to emit ESC [ 6 n and use results

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This makes line editing able to recognize case when
cursor was not at the beginning of the line. It may also
be adapted later to find out display size (serial line users
would love it).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2009-05-17 16:44:54 +02:00
parent 071ede1e5d
commit 020f40693a
6 changed files with 116 additions and 35 deletions
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12
libbb/Config.in
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@@ -102,6 +102,18 @@ config FEATURE_EDITING_FANCY_PROMPT
Setting this option allows for prompts to use things like \w and
\$ and escape codes.
config FEATURE_EDITING_ASK_TERMINAL
bool "Query cursor position from terminal"
default n
depends on FEATURE_EDITING
help
Allow usage of "ESC [ 6 n" sequence. Terminal answers back with
current cursor position. This information is used to make line
editing more robust in some cases.
If you are not sure whether your terminals respond to this code
correctly, or want to save on code size (about 300 bytes),
then do not turn this option on.
config FEATURE_VERBOSE_CP_MESSAGE
bool "Give more precise messages when copy fails (cp, mv etc)"
default n