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% url.sty ver 1.4 02-Mar-1999 Donald Arseneau asnd@triumf.ca |
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% Copyright 1996-1999 Donald Arseneau, Vancouver, Canada. |
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% This program can be used, distributed, and modified under the terms |
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% of the LaTeX Project Public License. |
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% |
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% A form of \verb that allows linebreaks at certain characters or |
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% combinations of characters, accepts reconfiguration, and can usually |
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% be used in the argument to another command. It is intended for email |
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% addresses, hypertext links, directories/paths, etc., which normally |
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% have no spaces. The font may be selected using the \urlstyle command, |
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% and new url-like commands can be defined using \urldef. |
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% |
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% Usage: Conditions: |
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% \url{ } If the argument contains any "%", "#", or "^^", or ends with |
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% "\", it can't be used in the argument to another command. |
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% The argument must not contain unbalanced braces. |
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% \url| | ...where "|" is any character not used in the argument and not |
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% "{" or a space. The same restrictions as above except that the |
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% argument may contain unbalanced braces. |
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% \xyz for "\xyz" a defined-url; this can be used anywhere, no matter |
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% what characters it contains. |
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% |
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% See further instructions after "\endinput" |
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% |
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\def\Url@ttdo{% style assignments for tt fonts or T1 encoding |
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\def\UrlBreaks{\do\.\do\@\do\\\do\/\do\!\do\_\do\|\do\%\do\;\do\>\do\]% |
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\do\)\do\,\do\?\do\'\do\+\do\=}% |
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\def\UrlBigBreaks{\do\:\do@url@hyp}% |
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\def\UrlNoBreaks{\do\(\do\[\do\{\do\<}% (unnecessary) |
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\def\UrlSpecials{\do\ {\ }}% |
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\def\UrlOrds{\do\*\do\-\do\~}% any ordinary characters that aren't usually |
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} |
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\def\Url@do{% style assignments for OT1 fonts except tt |
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\def\UrlBreaks{\do\.\do\@\do\/\do\!\do\%\do\;\do\]\do\)\do\,\do\?\do\+\do\=}% |
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\def\UrlBigBreaks{\do\:\do@url@hyp}% |
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\def\UrlNoBreaks{\do\(\do\[\do\{}% prevents breaks after *next* character |
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\def\UrlSpecials{\do\<{\langle}\do\>{\mathbin{\rangle}}\do\_{\_% |
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\penalty\@m}\do\|{\mid}\do\{{\lbrace}\do\}{\mathbin{\rbrace}}\do |
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\\{\mathbin{\backslash}}\do\~{\raise.6ex\hbox{\m@th$\scriptstyle\sim$}}\do |
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\ {\ }}% |
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\def\UrlOrds{\do\'\do\"\do\-}% |
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} |
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\def\url@ttstyle{% |
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\@ifundefined{selectfont}{\def\UrlFont{\tt}}{\def\UrlFont{\ttfamily}}\Url@ttdo |
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} |
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\def\url@rmstyle{% |
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\@ifundefined{selectfont}{\def\UrlFont{\rm}}{\def\UrlFont{\rmfamily}}\Url@do |
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} |
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\def\url@sfstyle{% |
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\@ifundefined{selectfont}{\def\UrlFont{\sf}}{\def\UrlFont{\sffamily}}\Url@do |
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} |
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\def\url@samestyle{\ifdim\fontdimen\thr@@\font=\z@ \url@ttstyle \else |
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\url@rmstyle \fi \def\UrlFont{}} |
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\@ifundefined{strip@prefix}{\def\strip@prefix#1>{}}{} |
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\@ifundefined{verbatim@nolig@list}{\def\verbatim@nolig@list{\do\`}}{} |
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\def\Url{% |
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\begingroup \let\url@moving\relax\relax \endgroup |
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\ifmmode\@nomatherr$\fi |
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\UrlFont $\fam\z@ \textfont\z@\font |
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\let\do\@makeother \dospecials % verbatim catcodes |
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\catcode`{\@ne \catcode`}\tw@ \catcode`\ 10 % except braces and spaces |
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\medmuskip0mu \thickmuskip\medmuskip \thinmuskip\medmuskip |
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\@tempcnta\fam\multiply\@tempcnta\@cclvi |
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\let\do\set@mathcode \UrlOrds % ordinary characters that were special |
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\advance\@tempcnta 8192 \UrlBreaks % bin |
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\advance\@tempcnta 4096 \UrlBigBreaks % rel |
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\advance\@tempcnta 4096 \UrlNoBreaks % open |
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\let\do\set@mathact \UrlSpecials % active |
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\let\do\set@mathnolig \verbatim@nolig@list % prevent ligatures |
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\@ifnextchar\bgroup\Url@z\Url@y} |
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\def\Url@y#1{\catcode`{11 \catcode`}11 |
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\def\@tempa##1#1{\Url@z{##1}}\@tempa} |
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\def\Url@z#1{\def\@tempa{#1}\expandafter\expandafter\expandafter\Url@Hook |
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\expandafter\strip@prefix\meaning\@tempa\UrlRight\m@th$\endgroup} |
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\def\Url@Hook{\UrlLeft} |
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\let\UrlRight\@empty |
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\let\UrlLeft\@empty |
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\def\set@mathcode#1{\count@`#1\advance\count@\@tempcnta\mathcode`#1\count@} |
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\def\set@mathact#1#2{\mathcode`#132768 \lccode`\~`#1\lowercase{\def~{#2}}} |
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\def\set@mathnolig#1{\ifnum\mathcode`#1<32768 |
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\lccode`\~`#1\lowercase{\edef~{\mathchar\number\mathcode`#1_{\/}}}% |
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\mathcode`#132768 \fi} |
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\def\urldef#1#2{\begingroup \setbox\z@\hbox\bgroup |
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\def\Url@z{\Url@def{#1}{#2}}#2} |
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\expandafter\ifx\csname DeclareRobustCommand\endcsname\relax |
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\def\Url@def#1#2#3{\m@th$\endgroup\egroup\endgroup |
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\def#1{#2{#3}}} |
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\else |
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\def\Url@def#1#2#3{\m@th$\endgroup\egroup\endgroup |
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\DeclareRobustCommand{#1}{#2{#3}}} |
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\fi |
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\def\urlstyle#1{\csname url@#1style\endcsname} |
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% Sample (and default) configuration: |
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% |
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\newcommand\url{\begingroup \Url} |
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% |
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% picTeX defines \path, so declare it optionally: |
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\@ifundefined{path}{\newcommand\path{\begingroup \urlstyle{tt}\Url}}{} |
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% |
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% too many styles define \email like \address, so I will not define it. |
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% \newcommand\email{\begingroup \urlstyle{rm}\Url} |
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% Process LaTeX \package options |
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% |
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\urlstyle{tt} |
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\let\Url@sppen\@M |
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\def\do@url@hyp{}% by default, no breaks after hyphens |
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\@ifundefined{ProvidesPackage}{}{ |
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\ProvidesPackage{url}[1999/03/02 \space ver 1.4 \space |
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Verb mode for urls, email addresses, and file names] |
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\DeclareOption{hyphens}{\def\do@url@hyp{\do\-}}% allow breaks after hyphens |
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\DeclareOption{obeyspaces}{\let\Url@Hook\relax}% a flag for later |
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\DeclareOption{spaces}{\let\Url@sppen\relpenalty} |
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\DeclareOption{T1}{\let\Url@do\Url@ttdo} |
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\ProcessOptions |
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\ifx\Url@Hook\relax % [obeyspaces] was declared |
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\def\Url@Hook#1\UrlRight\m@th{\edef\@tempa{\noexpand\UrlLeft |
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\Url@retain#1\Url@nosp\, }\@tempa\UrlRight\m@th} |
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\def\Url@retain#1 {#1\penalty\Url@sppen\ \Url@retain} |
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\def\Url@nosp\,#1\Url@retain{} |
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\fi |
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} |
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\edef\url@moving{\csname Url Error\endcsname} |
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\expandafter\edef\url@moving |
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{\csname url used in a moving argument.\endcsname} |
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\expandafter\expandafter\expandafter \let \url@moving\undefined |
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\endinput |
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% |
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% url.sty ver 1.4 02-Mar-1999 Donald Arseneau asnd@reg.triumf.ca |
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% |
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% This package defines "\url", a form of "\verb" that allows linebreaks, |
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% and can often be used in the argument to another command. It can be |
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% configured to print in different formats, and is particularly useful for |
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% hypertext links, email addresses, directories/paths, etc. The font may |
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% be selected using the "\urlstyle" command and pre-defined text can be |
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% stored with the "\urldef" command. New url-like commands can be defined, |
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% and a "\path" command is provided this way. |
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% |
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% Usage: Conditions: |
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% \url{ } If the argument contains any "%", "#", or "^^", or ends with |
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% "\", it can't be used in the argument to another command. |
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% The argument must not contain unbalanced braces. |
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% \url| | ...where "|" is any character not used in the argument and not |
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% "{" or a space. The same restrictions as above except that the |
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% argument may contain unbalanced braces. |
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% \xyz for "\xyz" a defined-url; this can be used anywhere, no matter |
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% what characters it contains. |
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% |
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% The "\url" command is fragile, and its argument is likely to be very |
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% fragile, but a defined-url is robust. |
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% |
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% Package Option: obeyspaces |
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% Ordinarily, all spaces are ignored in the url-text. The "[obeyspaces]" |
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% option allows spaces, but may introduce spurious spaces when a url |
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% containing "\" characters is given in the argument to another command. |
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% So if you need to obey spaces you can say "\usepackage[obeyspaces]{url}", |
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% and if you need both spaces and backslashes, use a `defined-url' for |
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% anything with "\". |
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% |
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% Package Option: hyphens |
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% Ordinarily, breaks are not allowed after "-" characters because this |
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% leads to confusion. (Is the "-" part of the address or just a hyphen?) |
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% The package option "[hyphens]" allows breaks after explicit hyphen |
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% characters. The "\url" command will *never ever* hyphenate words. |
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% |
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% Package Option: spaces |
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% Likewise, breaks are not usually allowed after spaces under the |
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% "[obeyspaces]" option, but giving the options "[obeyspaces,spaces]" |
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% will allow breaks at those spaces. |
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% |
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% Package Option: T1 |
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% This signifies that you will be using T1-encoded fonts which contain |
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% some characters missing from most older (OT1) encoded TeX fonts. This |
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% changes the default definition for "\urlstyle{rm}". |
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% |
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% Defining a defined-url: |
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% Take for example the email address "myself%node@gateway.net" which could |
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% not be given (using "\url" or "\verb") in a caption or parbox due to the |
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% percent sign. This address can be predefined with |
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% \urldef{\myself}\url{myself%node@gateway.net} or |
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% \urldef{\myself}\url|myself%node@gateway.net| |
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% and then you may use "\myself" instead of "\url{myself%node@gateway.net}" |
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% in an argument, and even in a moving argument like a caption because a |
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% defined-url is robust. |
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% |
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% Style: |
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% You can switch the style of printing using "\urlstyle{tt}", where "tt" |
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% can be any defined style. The pre-defined styles are "tt", "rm", "sf", |
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% and "same" which all allow the same linebreaks but different fonts -- |
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% the first three select a specific font and the "same" style uses the |
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% current text font. You can define your own styles with different fonts |
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% and/or line-breaking by following the explanations below. The "\url" |
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% command follows whatever the currently-set style dictates. |
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% |
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% Alternate commands: |
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% It may be desireable to have different things treated differently, each |
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% in a predefined style; e.g., if you want directory paths to always be |
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% in tt and email addresses to be rm, then you would define new url-like |
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% commands as follows: |
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% |
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% \newcommand\email{\begingroup \urlstyle{rm}\Url} |
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% \newcommand\directory{\begingroup \urlstyle{tt}\Url} |
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% |
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% You must follow this format closely, and NOTE that the final command is |
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% "\Url", not "\url". In fact, the "\directory" example is exactly the |
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% "\path" definition which is pre-defined in the package. If you look |
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% above, you will see that "\url" is defined with |
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% \newcommand\url{\begingroup \Url} |
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% I.e., using whatever url-style has been selected. |
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% |
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% You can make a defined-url for these other styles, using the usual |
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% "\urldef" command as in this example: |
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% |
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% \urldef{\myself}{\email}{myself%node.domain@gateway.net} |
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% |
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% which makes "\myself" act like "\email{myself%node.domain@gateway.net}", |
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% if the "\email" command is defined as above. The "\myself" command |
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% would then be robust. |
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% |
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% Defining styles: |
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% Before describing how to customize the printing style, it is best to |
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% mention something about the unusual implementation of "\url". Although |
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% the material is textual in nature, and the font specification required |
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% is a text-font command, the text is actually typeset in *math* mode. |
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% This allows the context-sensitive linebreaking, but also accounts for |
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% the default behavior of ignoring spaces. Now on to defining styles. |
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% |
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% To change the font or the list of characters that allow linebreaks, you |
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% could redefine the commands "\UrlFont", "\UrlBreaks", "\UrlSpecials" etc. |
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% directly in the document, but it is better to define a new `url-style' |
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% (following the example of "\url@ttstyle" and "\url@rmstyle") which defines |
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% all of "\UrlBigbreaks", "\UrlNoBreaks", "\UrlBreaks", "\UrlSpecials", and |
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% "\UrlFont". |
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% |
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% Changing font: |
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% The "\UrlFont" command selects the font. The definition of "\UrlFont" |
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% done by the pre-defined styles varies to cope with a variety of LaTeX |
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% font selection schemes, but it could be as simple as "\def\UrlFont{\tt}". |
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% Depending on the font selected, some characters may need to be defined |
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% in the "\UrlSpecials" list because many fonts don't contain all the |
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% standard input characters. |
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% |
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% Changing linebreaks: |
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% The list of characters that allow line-breaks is given by "\UrlBreaks" |
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% and "\UrlBigBreaks", which have the format "\do\c" for character "c". |
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% The differences are that `BigBreaks' have a lower penalty and have |
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% different breakpoints when in sequence (as in "http://"): `BigBreaks' |
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% are treated as mathrels while `Breaks' are mathbins (see The TeXbook, |
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% p.170). In particular, a series of `BigBreak' characters will break at |
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% the end and only at the end; a series of `Break' characters will break |
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% after the first and after every following *pair*; there will be no |
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% break after a `Break' character if a `BigBreak' follows. In the case |
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% of "http://" it doesn't matter whether ":" is a `Break' or `BigBreak' -- |
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% the breaks are the same in either case; but for DECnet nodes with "::" |
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% it is important to prevent breaks *between* the colons, and that is why |
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% colons are `BigBreaks'. |
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% |
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% It is possible for characters to prevent breaks after the next following |
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% character (I use this for parentheses). Specify these in "\UrlNoBreaks". |
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% |
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% You can do arbitrarily complex things with characters by making them |
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% active in math mode (mathcode hex-8000) and specifying the definition(s) |
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% in "\UrlSpecials". This is used in the rm and sf styles for OT1 font |
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% encoding to handle several characters that are not present in those |
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% computer-modern style fonts. See the definition of "\Url@do", which |
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% is used by both "\url@rmstyle" and "\url@sfstyle"; it handles missing |
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% characters via "\UrlSpecials". The nominal format for setting each |
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% special character "c" is: "\do\c{<definition>}", but you can include |
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% other definitions too. |
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% |
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% |
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% If all this sounds confusing ... well, it is! But I hope you won't need |
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% to redefine breakpoints -- the default assignments seem to work well for |
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% a wide variety of applications. If you do need to make changes, you can |
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% test for breakpoints using regular math mode and the characters "+=(a". |
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% |
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% Yet more flexibility: |
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% You can also customize the verbatim text by defining "\UrlRight" and/or |
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% "\UrlLeft", e.g., for ISO formatting of urls surrounded by "< >", define |
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% |
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% \renewcommand\url{\begingroup \def\UrlLeft{<url: }\def\UrlRight{>}% |
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% \urlstyle{tt}\Url} |
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% |
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% The meanings of "\UrlLeft" and "\UrlRight" are *not* reproduced verbatim. |
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% This lets you use formatting commands there, but you must be careful not |
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% to use TeX's special characters ("\^_%~#$&{}" etc.) improperly. |
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% You can also define "\UrlLeft" to reprocess the verbatim text, but the |
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% format of the definition is special: |
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% |
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% \def\UrlLeft#1\UrlRight{ ... do things with #1 ... } |
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% |
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% Yes, that is "#1" followed by "\UrlRight" then the definition. For |
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% example, to put a hyperTeX hypertext link in the DVI file: |
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% |
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% \def\UrlLeft#1\UrlRight{\special{html:<a href="#1">}#1\special{html:</a>}} |
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% |
| 307 |
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% Using this technique, url.sty can provide a convenient interface for |
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% performing various operations on verbatim text. You don't even need |
| 309 |
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% to print out the argument! For greatest efficiency in such obscure |
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% applications, you can define a null url-style where all the lists like |
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% "\UrlBreaks" are empty. |
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% |
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% Revision History: |
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% ver 1.1 6-Feb-1996: |
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% Fix hyphens that wouldn't break and ligatures that weren't suppressed. |
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% ver 1.2 19-Oct-1996: |
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% Package option for T1 encoding; Hooks: "\UrlLeft" and "\UrlRight". |
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% ver 1.3 21-Jul-1997: |
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% Prohibit spaces as delimiter characters; change ascii tilde in OT1. |
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% ver 1.4 02-Mar-1999 |
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% LaTeX license; moving-argument-error |
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% The End |
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Test file integrity: ASCII 32-57, 58-126: !"#$%&'()*+,-./0123456789 |
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:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~ |
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