Based on the cases you listed, you can use this pattern:
$ROEPatterns["/(\\(:FIXME:\\)|(?<![\t])\\bFIXME\\b)/"] = '(:FIXME:)';
Or the same broken into pieces, one with comments:
$ROEPatterns["/(
\\(:FIXME:\\) # existing
| # or
(?<![\t]) # not preceded by tab
\\bFIXME\\b # between non-word characters
)/x"] = '(:FIXME:)';
The word boundary \b already matches start/end of text, newlines and
spaces so you don't need to add these.
The expression has (?<![\t]) -- a rarely used RegEx feature called
negative lookbehind to exclude the "[TAB]FIXME" case. This feature can
only look for strings with fixed length so we need to also find the
existing (:FIXME:) directives in order to not process them.
Alternatively we can test for ":FIXME" which may be part of "(:FIXME:)"
or not. If there are no cases where you need to replace ":FIXME" with
":(:FIXME:)" then the pattern can be simpler:
$ROEPatterns["/(?<![\t:])\\bFIXME\\b/"] = '(:FIXME:)';
that is "FIXME" not part of a word, and not preceded by TAB or colon.
I would advise enabling the "Preview changes" feature and pressing
"Preview" to see how this behaves and to make sure nothing is forgotten
or replaced by mistake.
You can read more about lookahead and lookbehind here:
https://www.regular-expressions.info/lookaround.html
In case you wonder about the comments in the pattern, the /x modifier or
why the \t is in brackets, see here:
https://www.php.net/manual/en/reference.pcre.pattern.modifiers.php
Petko
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On 10/01/2020 22:45, Robert Riebisch wrote:
As I'm not very familiar with RegExp it took my some hours on
<https://regexr.com/> to create an ROE Pattern to replace FIXME with
(:FIXME:)
$ROEPatterns['/(^|\\n| )\\b(FIXME)\\b( ?)/'] = '\\1(:\\2:)\\3';
It seems to work for me now, but is it really right on edge cases?
My test cases:
#####
FIXME
^^^^^ At the beginning (match:)
Standalone (match):
FIXME
Already replaced (no match):
(:FIXME:)
In the middle of a word (no match):
fooFIXMEbar
Lowercase (no match):
fixme
Indented by 1 space (match):
FIXME
Indented by 2 spaces (match):
FIXME
Indented by 1 TAB (no match):
FIXME
Indented and followed by spaces (match):
FIXME
Somewhere in a text (match):
Foo FIXME bar.
End the end (match):
FIXME
#####
Cheers,
Robert
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