Re: [Pan-users] Select Headers with RE in the Subject/Author Entryfield?

[Andrew Nile]

On 12 June 2015 at 13:59, Duncan <address@hidden> wrote:
> [...] It may be that the code deliberately
> shuts off parsing in this case, and "forgets" to turn it back on again,
> thus leaving the process stuck until toggled.

I reckon this is probably the right answer. I've found the code where
Pan attempts to make sense of the regex entered into the search box
[text-match.cc:202], and it seems to have three states:

NEED_COMPILE - a regex is entered & needs looking at
COMPILED - a looked at regex is successfully filtered
ERR - a looked at regex seems to be invalid

NEED_COMPILE turns into COMPILED nicely enough and back when finished.
But when ERR happens, nothing resets it to NEED_COMPILE and it won't
check again until toggled.

As there's only 0.5 seconds to enter a regex, even a valid but
partially typed one will end up in an ERR state.

I created a quick patch that resets ERR back into NEED_COMPILE, and in
my quick testing seems to work. The only gotcha is it spams up the log
a bit with "Can't use regular expression" type error messages until
valid, but this happens the first time an invalid regex is entered
anyway.

Patch attached for the brave! :-)

text-match.cc.patch
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