1CSS(3) User Contributed Perl Documentation CSS(3)
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6 CSS - Object oriented access to Cascading Style Sheets (CSS)
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9 use CSS;
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11 # create a CSS object with the default options
12 my $css = CSS->new();
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14 # create a CSS object with a specific parser
15 my $css = CSS->new( { 'parser' => 'CSS::Parse::Lite' } );
16 my $css = CSS->new( { 'parser' => 'CSS::Parse::Heavy' } );
17 my $css = CSS->new( { 'parser' => 'CSS::Parse::Compiled' } );
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19 # create a CSS object with a specific adaptor
20 my $css = CSS->new( { 'adaptor' => 'CSS::Adaptor' } );
21 my $css = CSS->new( { 'adaptor' => 'CSS::Adaptor::Pretty' } );
22 my $css = CSS->new( { 'adaptor' => 'CSS::Adaptor::Debug' } );
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26 # parse some CSS from a string
27 $css->read_string( $css_data );
28 $css->read_string( ( $css_data, $more_css_data ) );
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30 # parse some CSS from a file
31 $css->read_file( 'my_file.css' );
32 $css->read_file( ( 'my_file.css', 'my_other_file.css' ) );
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36 # output the CSS using the current adaptor
37 print $css->output();
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39 # set a new adaptor and then output the CSS
40 $css->set_adaptor( 'CSS::Adaptor::Foo' );
41 print $css->output();
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43 # output the CSS using a tempory adaptor
44 print $css->output( 'CSS::Adaptor::Bar' );
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48 # forget about the CSS we've already parsed
49 $css->purge();
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52 This module can be used, along with a CSS::Parse::* module, to parse
53 CSS data and represent it as a tree of objects. Using a CSS::Adaptor::*
54 module, the CSS data tree can then be transformed into other formats.
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57 From version 1.00 of this module onwards, backwards compatibility is
58 broken. This is due to large changes in the way data is parsed and then
59 represented internally. Version 0.08 is still available on CPAN:
60 <http://search.cpan.org/author/IAMCAL/CSS-0.08/>
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63 The CSS object is the head of the tree. It contains a list of
64 CSS::Style objects which each represent a CSS ruleset. Each of these
65 objects contains a list of selectors and properties. Each selector is
66 stored as a CSS::Selector object. Each property object is stored as a
67 CSS::Property object and contains a list of values. These values are
68 stored as CSS::Value objects.
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70 foo, bar {
71 baz: fop;
72 woo: yay houpla;
73 }
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75 The above example would be represented as a single CSS::Style object.
76 That object would then have two CSS::Selector objects representing
77 'foo' and 'bar'. It would also have two CSS::Property objects
78 representing 'baz' and 'woo'. The 'baz' object then has a single child
79 CSS::Value object for 'fop', whilst the 'woo' object has two child
80 objects for 'yay' and 'houpla'.
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83 CONSTRUCTOR
84 new() or "new( { ..options.. } )"
85 An optional hash can contain arguments:
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87 parser module to use as the CSS parser
88 adaptor adaptor to use for output
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90 ACCESSORS
91 read_file( $filename ) or read_file( @filenames )
92 Read one or mores files and parse the CSS within them.
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94 read_string( $scalar ) or read_string( @strings )
95 Read one or more strings and parse the CSS within them.
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97 output() or output( 'CSS::Adaptor::Foo' )
98 Return a string representation of the CSS tree, using either the
99 current adaptor or the specified one.
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101 set_adaptor( 'CSS::Adaptor::Bar' )
102 Set the current adaptor for the CSS tree.
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104 purge()
105 Forget all the objects in the CSS tree;
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107 get_style_by_selector( 'selector_name' )
108 Returns the first CSS::Style object with the specified selector
109 name attached. Returns zero on failure.
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112 Copyright (C) 2001-2002, Allen Day <allenday@ucla.edu>
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114 Copyright (C) 2003-2004, Cal Henderson <cal@iamcal.com>
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117 CSS::Style, CSS::Selector, CSS::Property, CSS::Value, CSS::Parse,
118 CSS::Parse::Lite, CSS::Parse::Heavy, CSS::Parse::Compiled,
119 CSS::Parse::PRDGrammar, CSS::Adaptor, CSS::Adaptor::Pretty,
120 CSS::Adaptor::Debug, perl(1)
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124perl v5.36.0 2023-01-20 CSS(3)