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%D \module
%D [ file=lang-url,
%D version=2008.01.22, % used to be lang-mis
%D title=\CONTEXT\ Language Macros,
%D subtitle=Language Options,
%D author=Hans Hagen,
%D date=\currentdate,
%D copyright={PRAGMA / Hans Hagen \& Ton Otten}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.
\unprotect
%D This is rather old code. The following solution was used
%D for a long time and is kind of built-up over the years.
\ifx\\\undefined \let\\\crlf \fi
%D \macros
%D {hyphenatedurl}
%D
%D For those who want to put full \URL's in a text, we offer
%D
%D \startbuffer
%D \hyphenatedurl{http://optimist.optimist/optimist/optimist.optimist#optimist}
%D \stopbuffer
%D
%D \typebuffer
%D
%D which breaks at the appropriate places. Watch the \type{#}
%D hack.
%D
%D When passed as argument, like in \type {\goto}, one needs
%D to substitute a \type {\\} for each \type{#}.
%D
%D \startbuffer
%D \hyphenatedurl{http://this.is.a.rather/strange/reference#indeed}
%D \stopbuffer
%D
%D \typebuffer
\ifx\urlsplitmode\undefined \chardef\urlsplitmode\plusone \fi
% 0 => don't split
% 1 => . : na, rest voor
% 2 => alles na
% 3 => alles voor
% \bgroup \catcode`\~=\active \catcode`\/=\active
%
% \unexpanded\gdef\hyphenatedurl#1% {}{} handles accents
% {\bgroup
% \ifnum\hyphenpenalty<10000 \else
% \def\discretionary##1##2##3{##1\allowbreak##2}%
% \fi
% \obeyhyphens
% \def\splitbefore##1%
% {\setbox\scratchbox=\hbox{##1{}{}}%
% \ifcase\urlsplitmode
% \box\scratchbox
% \or
% \postwordbreak\box\scratchbox\prewordbreak
% \or
% \prewordbreak\discretionary{\box\scratchbox}{}{\box\scratchbox}\prewordbreak
% \else
% \postwordbreak\box\scratchbox\prewordbreak
% \fi}%
% \def\splitafter##1%
% {\ifcase\urlsplitmode
% ##1{}{}%
% \or
% \prewordbreak\discretionary{##1{}{}}{}{##1{}{}}\prewordbreak
% \or
% \prewordbreak\discretionary{##1{}{}}{}{##1{}{}}\prewordbreak
% \else
% \prewordbreak\discretionary{}{##1{}{}}{##1{}{}}\prewordbreak
% \fi}%
% \def\splitanyway##1%
% {\prewordbreak##1\prewordbreak}%
% \def\flushurl%
% {\savedurl\let\savedurl\empty}%
% \def\\%
% {\spliturl\#}%
% \let\~=\lettertilde\let~=\~%
% \let\/=\letterslash\let/=\/%
% \let\savedurl\empty
% \scratchcounter\zerocount % used for hyphenmethod
% \handletokens#1\with\scanurl\savedurl
% \egroup}
%
% \egroup
% \chardef\urlhyphenmethod=0
% \def\scanurl#1%
% {\advance\scratchcounter\plusone
% \ifx#1\blankspace
% \flushurl\splitanyway\normalspace
% \else\ifx#1\ %
% \flushurl\splitanyway\normalspace
% \else\ifx#1\space
% \flushurl\splitanyway\normalspace
% \else\ifx#1\~%
% \flushurl\splitbefore\~%
% \else\ifx#1\#%
% \flushurl\splitbefore\#%
% \else\ifx#1\&%
% \flushurl\splitbefore\&%
% \else\ifx#1\%%
% \flushurl\splitbefore\%%
% \else\ifx#1\_%
% \flushurl\splitbefore\_%
% \else\if\noexpand#1\relax
% #1%
% \else\ifnum\catcode`#1=8
% \flushurl\splitbefore\_%
% \else\ifnum\catcode`#1=6
% \flushurl\splitbefore\#%
% \else\ifnum\catcode`#1=4
% \flushurl\splitbefore\&%
% \else\expandafter\if\string#1\lettertilde
% \flushurl\splitbefore\~%
% \else\expandafter\if\string#1\letterpercent
% \flushurl\splitbefore\%%
% \else\expandafter\if\string#1\letterunderscore
% \flushurl\splitbefore\_%
% \else\expandafter\if\string#1\letterquestionmark
% \flushurl\splitafter\letterquestionmark
% \else\expandafter\if\string#1\letterat
% \flushurl\splitafter\letterat
% \else\expandafter\if\string#1\letterslash
% \edef\savedurl{\savedurl\letterslash}%
% \else\expandafter\if\string#1+%
% \flushurl\splitafter+%
% \else\expandafter\if\string#1:%
% \flushurl\splitafter:%
% \else\expandafter\if\string#1.%
% \flushurl\splitafter.%
% \else\expandafter\if\string#1(%
% \flushurl\splitbefore(%
% \else\expandafter\if\string#1)%
% \flushurl\splitafter)%
% \else
% \ifx\savedurl\empty\else
% \splitbefore\savedurl
% \let\savedurl\empty
% \fi
% \ifcase\urlhyphenmethod
% \string#1%
% \else
% \ifnum\scratchcounter>\plusthree % so, \http: will not break
% \edef\savedurl{\string#1}%
% \else
% \string#1%
% \fi
% \fi
% \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}
%D The following approach takes more resources but is cleaner (after all, we now
%D have huge \TEX's. It's is basically a \TEX\ version of the \MKIV\ variant.
\newtoks\everyhyphenatedurl
\appendtoks
\let\&\letterampersand
\let\#\letterhash
\let\~\lettertilde
\let\\\letterbackslash
\let\$\letterdollar
\let\^\letterhat
\let\_\letterunderscore
\let\{\letterleftbrace
\let\}\letterrightbrace
\let\|\letterbar
\let~=\lettertilde
\let|=\letterbar
\to \everyhyphenatedurl
\def\hyphenatedurlseparator{} % \periodcentered
\def\dohyphenatedurlnormal#1{\char#1\relax}%
\def\dohyphenatedurlafter #1{\char#1\discretionary{}{\hyphenatedurlseparator}{}}%
\def\dohyphenatedurlbefore#1{\discretionary{\hyphenatedurlseparator}{}{}\char#1\relax}%
% 0=normal 1=before 2=after
\def\sethyphenatedurlnormal#1{\expandafter\chardef\csname url @ #1\endcsname\zerocount}
\def\sethyphenatedurlbefore#1{\expandafter\chardef\csname url @ #1\endcsname\plusone }
\def\sethyphenatedurlafter #1{\expandafter\chardef\csname url @ #1\endcsname\plustwo }
\sethyphenatedurlbefore !
\sethyphenatedurlbefore "
\sethyphenatedurlbefore \letterhash
\sethyphenatedurlbefore \letterdollar
\sethyphenatedurlbefore \letterpercent
\sethyphenatedurlbefore \letterampersand
\sethyphenatedurlbefore (
\sethyphenatedurlbefore *
\sethyphenatedurlbefore +
\sethyphenatedurlbefore ,
\sethyphenatedurlbefore -
\sethyphenatedurlbefore .
\sethyphenatedurlbefore /
\sethyphenatedurlbefore :
\sethyphenatedurlbefore ;
\sethyphenatedurlbefore <
\sethyphenatedurlbefore =
\sethyphenatedurlbefore >
\sethyphenatedurlbefore ?
\sethyphenatedurlbefore @
\sethyphenatedurlbefore [
\sethyphenatedurlbefore \letterbackslash
\sethyphenatedurlbefore ^
\sethyphenatedurlbefore _
\sethyphenatedurlbefore `
\sethyphenatedurlbefore \letteropenbrace
\sethyphenatedurlbefore \letterbar
\sethyphenatedurlbefore \lettertilde
\sethyphenatedurlafter '
\sethyphenatedurlafter )
\sethyphenatedurlafter ]
\sethyphenatedurlafter \letterclosebrace
\unexpanded \def\hyphenatedurl#1%
{\dontleavehmode
\begingroup
\the\everyhyphenatedurl
\edef\ascii{#1}%
\expanded{\handletokens{\detokenize\expandafter{\ascii}}}\with\dohyphenatedurl
\endgroup}
\def\dohyphenatedurl#1%
{\ifcase\executeifdefined{url @ #1}\zerocount\relax
\expandafter\dohyphenatedurlnormal
\or
\expandafter\dohyphenatedurlbefore
\or
\expandafter\dohyphenatedurlafter
\fi{\number`#1}}
% maybe ... to be finished
%
% \def\hyphenatedstring#1%
% {\bgroup
% \nohyphens
% \def\next##1{##1\doif{##1}{-}{\allowbreak}}%
% \handletokens#1\with\next
% \egroup}
%
% {\hsize1cm\hyphenatedstring{ABXXXXXXXXXXC-12345-12345}}
%D \macros
%D {hyphenatedfilename}
%D
%D For the moment we treat filenames in a similar way,
%D
%D \starttyping
%D \hyphenatedfilename{here/there/filename.suffix}
%D \stoptyping
\ifx\hyphenatedfilename\undefined \let\hyphenatedfilename\hyphenatedurl \fi
% \def\test#1%
% {\dontleavehmode
% \begingroup
% \tttf
% \hyphenatedurl {%
% \letterampersand #1\letterampersand #1\letterampersand #1\letterampersand #1\letterampersand
% \letterhash #1\letterhash #1\letterpercent #1\letterslash #1\letterampersand
% }%
% \endgroup}
% \dorecurse{100}{\test{a} \test{ab} \test{abc} \test{abcd} \test{abcde} \test{abcdef}}
\protect \endinput
% \bgroup
% \gdef\lettercolon{:}
% \catcode`\:=\active
% \catcode`\^=\active
% \catcode`\/=\active
% \catcode`\~=\active
% \gdef\theurlcolon {\nobreak\hbox{\lettercolon}\allowbreak}
% \gdef\theurlslash#1{\nobreak\hbox{\letterslash}\ifx#1\relax\else\ifnum`/=\expandafter`\string#1\else\allowbreak\fi#1\fi}
% \gdef\theurlhat {\allowbreak\hbox{\letterhat}\nobreak}
% \gdef\theurltilde {\allowbreak\hbox{\lettertilde}\nobreak}
% \gdef\ForMojcaWhoLikesHacks#1%
% {\dontleavehmode
% \begingroup
% \mathcode`\:="8000 \let:\theurlcolon
% \mathcode`\^="8000 \let^\theurlhat
% \mathcode`\/="8000 \let/\theurlslash
% \mathcode`\~="8000 \let~\theurltilde
% \everymath\emptytoks
% \mathsurround\zeropoint$\tf#1\relax$%
% \endgroup}
% \egroup
% \hsize 1mm \ForMojcaWhoLikesHacks{http://www.sil.org//silesr/}
|
