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small improvement of autoedit.asciidoc

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This commit is contained in:
Maxime Coste 2015-02-03 13:56:55 +00:00
parent 2a28260f87
commit a68ce2bf51
1 changed files with 13 additions and 9 deletions
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22
doc/autoedit.asciidoc
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@ -32,17 +32,21 @@ note that if nothing gets selected on phase *2.*, an error will be raised.
We want to do that each time the user jumps a line, just after the new line
is inserted. So the hook would be:
------------------------------------------------------
:hook InsertChar \n %{ exec k<a-x>s^\h+<ret>yj<a-h>P }
------------------------------------------------------
--------------------------------------------------------
:hook InsertChar \n %{ exec k<a-x> s^\h+<ret>y j<a-h>P }
--------------------------------------------------------
(exec concatenates the keys for all argument, so the spaces will be ignored,
allowing for clearer separation. either use <space> or quote the argument to
use a space key)
That works, however if the phase *2.* raises an error, the +:exec+ will stop
and the user will get it's selections on the previous line. the solution
is to use a *draft* context, instead of the one the user is interacting with.
-------------------------------------------------------------
:hook InsertChar \n %{ exec -draft k<a-x>s^\h+<ret>yj<a-h>P }
-------------------------------------------------------------
---------------------------------------------------------------
:hook InsertChar \n %{ exec -draft k<a-x> s^\h+<ret>y j<a-h>P }
---------------------------------------------------------------
That way, exec is executed in a *copy* of the user's context, which means it
manipulates a *copy* of the user's selections.
@ -77,7 +81,7 @@ it will write informations about it in the debug buffer, which we do not want,
as this is actually expected. In order to prevent that, the exec should be
wrapped in a try command. So we would have:
-----------------------------------------------------------------------------
:hook InsertChar \n %[ try %[ exec -draft k<a-x><a-k>[{(]\h*$<ret>j<a-gt> ] ]
-----------------------------------------------------------------------------
-------------------------------------------------------------------------------
:hook InsertChar \n %[ try %[ exec -draft k<a-x> <a-k>[{(]\h*$<ret> j<a-gt> ] ]
-------------------------------------------------------------------------------