This PR refactors how picklists and option parsers are implemented in LibTidy,
making is vastly easier to implement new picklists in the future, as well as
modify some of the existing picklists such that they have more logical names.
Picklist arrays are now arrays of structures that include the possible strings
capable of setting a particular option value, and a new parser has been written
to work with these structures.
In addition, several of the existing parsers were removed, as they are now
redundant, and a couple of the remaining parsers were refactored to take
advantage of the new parser.
In effect, this means that:
- New parsers don't have to be written in the majority of cases where new
options are added that exceed yes/no/auto.
- Some of the existing options can have more meaningful names than yes/no/auto,
in a backward compatible way. For example, vertical-spacing "auto" currently
in no way reflects "auto" when used.
According to the MSN documentation 'isalnum(c)' is only valid when c equals
EOF, or is in the range 0 to 255 inclusive. It states the behavior is
undefined outside this range, and in Debug mode triggers an assert dialog.
in #352, but I'm worried that there's some over-reach here.
Currently only implemented as a warning, with no switch to turn it off, which
maintains current behavior other than the warning.
In general, we're treating any string as a complete URL, rather than breaking
URL's into component parts. Thus the `IsURLCodePoint()` check includes a few
other generic characters that strictly speaking aren't valid codepoints, but
are valid as escape characters and delimiters.
When addressing #338, I ran into a similar situation in not having a built-in
method to separate path components (although a simple generalized solution was
good enough in that case).
Thus without introducing a new structure and functions to deconstruct a URL
into scheme, authority, path, parameters, etc., some variation of this patch
will have to be used to address #352.
extension is a file, and so links to TLD's ending with .pl, .au, etc., will
cause accessibility warnings. This fix attempts to distinguish between URI's
that are likely to be files versus links to domains.
