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.IX Title "CSS::DOM::Util 3pm"
.TH CSS::DOM::Util 3pm "2018-02-12" "perl v5.26.1" "User Contributed Perl Documentation"
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.SH "NAME"
CSS::DOM::Util \- Utility functions for dealing with CSS tokens
.SH "VERSION"
.IX Header "VERSION"
Version 0.17
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 7
\&  use CSS::DOM::Util \*(Aq:all\*(Aq;
\&  # or:
\&  use CSS::DOM::Util qw[
\&    escape unescape
\&    escape_ident unescape_url
\&    escape_str unescape_str
\&  ];
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module provides utility functions for dealing with \s-1CSS\s0 tokens.
.SH "FUNCTIONS"
.IX Header "FUNCTIONS"
All functions below that take one argument have a \f(CW\*(C`($)\*(C'\fR prototype, so they
have the same precedence as \f(CW\*(C`closedir\*(C'\fR 
and \f(CW\*(C`delete\*(C'\fR.
.ie n .IP "escape $string, $chars_to_escape" 4
.el .IP "escape \f(CW$string\fR, \f(CW$chars_to_escape\fR" 4
.IX Item "escape $string, $chars_to_escape"
This escapes any characters in \f(CW$string\fR that occur in 
\&\f(CW$chars_to_escape\fR, which is interpreted as a regular expression. The
regexp must consume just one character; otherwise you'll find chars
missing from the output. \s-1ASCII\s0 vertical whitespace (except the vertical
tab) is always escaped.
.Sp
Printable non-alphanumeric \s-1ASCII\s0 characters and the space character are 
escaped with a single
backslash. Other characters are encoded in hexadecimal.
.Sp
\&\f(CW\*(C`escape\*(C'\fR also considers that you might want to include the escaped string
in a larger string, so it appends a space if the escaped string ends with a
hexadecimal escape with fewer than six digits.
.ie n .IP "unescape $string" 4
.el .IP "unescape \f(CW$string\fR" 4
.IX Item "unescape $string"
This turns something like \e\*(L"H\e65llo\e\*(R" into \*(L"Hello\*(R" (including quotes).
.ie n .IP "escape_ident $string" 4
.el .IP "escape_ident \f(CW$string\fR" 4
.IX Item "escape_ident $string"
.PD 0
.ie n .IP "escape_ident $string, $more_chars_to_escape" 4
.el .IP "escape_ident \f(CW$string\fR, \f(CW$more_chars_to_escape\fR" 4
.IX Item "escape_ident $string, $more_chars_to_escape"
.PD
This escapes \f(CW$string\fR as a \s-1CSS\s0 identifier, escaping also any characters
matched by \f(CW$more_chars_to_escape\fR.
.ie n .IP "unescape_url $url_token" 4
.el .IP "unescape_url \f(CW$url_token\fR" 4
.IX Item "unescape_url $url_token"
Returns the \s-1URL\s0 that the token represents.
.ie n .IP "escape_str $string" 4
.el .IP "escape_str \f(CW$string\fR" 4
.IX Item "escape_str $string"
Returns a \s-1CSS\s0 string token containing \f(CW$string\fR (within quotes; characters
possibly escaped).
.ie n .IP "unescape_str $string_token" 4
.el .IP "unescape_str \f(CW$string_token\fR" 4
.IX Item "unescape_str $string_token"
Returns the value that a \s-1CSS\s0 string token represents.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1CSS::DOM\s0