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