Newlines in language strings

[Chuck Foster]

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Hi,

One of the patches I need to apply to each new version of MailScanner is a
notification message that I wish to place at the top of each message
generated in the MessageBatch::WarnLocalPostmaster function. Now, in
principle I could get around having to patch the code by using the
'noticeprefix' language string instead; however, that doesn't allow
interpret newlines so I couldn't use this in the way I wanted for that.

Now, how much pain could it cause elsewhere to have the string returned
checked for newlines and subsequently used in output? Indeed, what if that
is taken a step further for %percent% and ENV vars too? I was thinking
something like:


sub DoLineExpansion { # like DoPercentVars but with ENV too
	my ($string) = @_;
	$string =~ s/\%([^%]+)\%/$PercentVars{lc($1)}/g;
	$string =~ s/\$\{?(\w+)\}?/$ENV{$1}/g;
	$string =~ s/\\n/\n/g;
	$string;
}

sub LanguageValue { return &DoLineExpansion( FindLanguageValue( @_ ) ); }


... where the original LanguageValue function is renamed FindLanguageValue;
thus, I could then have a line in languages.conf like:

	Notice Prefix: This is a line blah blah\nwith text on another
line\nFrom %org-long-name%

What could go horribly wrong ... ?!!!

(I guess this expansion could probably be extended to Value() and
QuickPeek() too at some point ...)

Chuck


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