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.\"
.IX Title "CSS::DOM::Rule 3pm"
.TH CSS::DOM::Rule 3pm "2018-02-12" "perl v5.26.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
CSS::DOM::Rule \- CSS rule class for CSS::DOM
.SH "VERSION"
.IX Header "VERSION"
Version 0.17
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&  use CSS::DOM::Rule \*(Aq:all\*(Aq; # import constants
\&
\&  use CSS::DOM;
\&  $sheet = new CSS::DOM;
\&  $sheet\->insertRule(\*(Aqbla blah blah {}\*(Aq);
\&  $rule = $sheet\->cssRules\->[0];
\&  
\&  $rule\->type; # STYLE_RULE
\&  $rule\->cssText; # \*(Aqbla blah blah {}\*(Aq or similar
\&  $rule\->cssText(\*(Aqp { margin: 0 }\*(Aq); # replace it
\&  $rule\->parentStyleSheet; # $sheet
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module provides the \s-1CSS\s0 rule class for \s-1CSS::DOM\s0. It implements
the CSSRule and CSSUnknownRule \s-1DOM\s0 interfaces.
.SH "METHODS"
.IX Header "METHODS"
.SS "Constructor"
.IX Subsection "Constructor"
Only call the constructor on this class to create an 'unknown' rule. You have to
call the constructor on a particular subclass to get another type. Normally
you do not need to 
call this directly anyway. (See \s-1CSS::DOM\s0's 
\&\f(CW\*(C`parse\*(C'\fR and \f(CW\*(C`insertRule\*(C'\fR methods.) But just in case you do want to call 
it, here it
is:
.PP
.Vb 1
\&  new CSS::DOM::Rule $parent; # unknown rule
\&  
\&  require CSS::DOM::Rule::Style
\&  new CSS::DOM::Rule::Style $parent;
\&  # etc.
.Ve
.PP
\&\f(CW$parent\fR is the parent rule, if the rule is nested, or the parent style
sheet otherwise.
.SS "Object Methods"
.IX Subsection "Object Methods"
.IP "type" 4
.IX Item "type"
Returns one of the constants below indicating the type of rule.
.IP "cssText" 4
.IX Item "cssText"
Returns this rule's \s-1CSS\s0 code. If you pass an argument, it will be parsed as
the new \s-1CSS\s0 code for this rule (replacing the existing data), and the old
value will be returned. This method will die if the replacement \s-1CSS\s0 code
creates a different type of rule.
.IP "parentStyleSheet" 4
.IX Item "parentStyleSheet"
This returns the style sheet to which the rule belongs.
.IP "parentRule" 4
.IX Item "parentRule"
This returns the rule's parent rule, if there is one, or an empty list
otherwise. There is only a parent rule if this one is nested, e.g., inside
a media rule.
.SH "EXPORTS"
.IX Header "EXPORTS"
The following constants that indicate the type of rule will be exported on
request (individually or with the ':all' tag):
.PP
.Vb 7
\&  UNKNOWN_RULE
\&  STYLE_RULE    
\&  CHARSET_RULE  
\&  IMPORT_RULE   
\&  MEDIA_RULE    
\&  FONT_FACE_RULE
\&  PAGE_RULE
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1CSS::DOM\s0
.PP
CSS::DOM::Rule::Style
.PP
CSS::DOM::Rule::Media
.PP
CSS::DOM::Rule::Page
.PP
CSS::DOM::Rule::Import