1CSS::Tiny(3)          User Contributed Perl Documentation         CSS::Tiny(3)
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3
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NAME

6       CSS::Tiny - Read/Write .css files with as little code as possible
7

SYNOPSIS

9           # In your .css file
10           H1 { color: blue }
11           H2 { color: red; font-family: Arial }
12           .this, .that { color: yellow }
13
14           # In your program
15           use CSS::Tiny;
16
17           # Create a CSS stylesheet
18           my $CSS = CSS::Tiny->new();
19
20           # Open a CSS stylesheet
21           $CSS = CSS::Tiny->read( 'style.css' );
22
23           # Reading properties
24           my $header_color = $CSS->{H1}->{color};
25           my $header2_hashref = $CSS->{H2};
26           my $this_color = $CSS->{'.this'}->{color};
27           my $that_color = $CSS->{'.that'}->{color};
28
29           # Changing styles and properties
30           $CSS->{'.newstyle'} = { color => '#FFFFFF' }; # Add a style
31           $CSS->{H1}->{color} = 'black';                # Change a property
32           delete $CSS->{H2};                            # Delete a style
33
34           # Save a CSS stylesheet
35           $CSS->write( 'style.css' );
36
37           # Get the CSS as a <style>...</style> tag
38           $CSS->html;
39

DESCRIPTION

41       "CSS::Tiny" is a perl class to read and write .css stylesheets with as
42       little code as possible, reducing load time and memory overhead. CSS.pm
43       requires about 2.6 meg or ram to load, which is a large amount of
44       overhead if you only want to do trivial things.  Memory usage is
45       normally scoffed at in Perl, but in my opinion should be at least kept
46       in mind.
47
48       This module is primarily for reading and writing simple files, and
49       anything we write shouldn't need to have documentation/comments. If you
50       need something with more power, move up to CSS.pm. With the increasing
51       complexity of CSS, this is becoming more common, but many situations
52       can still live with simple CSS files.
53
54   CSS Feature Support
55       "CSS::Tiny" supports grouped styles of the form "this, that { color:
56       blue }" correctly when reading, ungrouping them into the hash
57       structure. However, it will not restore the grouping should you write
58       the file back out. In this case, an entry in the original file of the
59       form
60
61           H1, H2 { color: blue }
62
63       would become
64
65           H1 { color: blue }
66           H2 { color: blue }
67
68       "CSS::Tiny" handles nested styles of the form "P EM { color: red }" in
69       reads and writes correctly, making the property available in the form
70
71           $CSS->{'P EM'}->{color}
72
73       "CSS::Tiny" ignores comments of the form "/* comment */" on read
74       correctly, however these comments will not be written back out to the
75       file.
76

CSS FILE SYNTAX

78       Files are written in a relatively human-orientated form, as follows:
79
80           H1 {
81               color: blue;
82           }
83           .this {
84               color: red;
85               font-size: 10px;
86           }
87           P EM {
88               color: yellow;
89           }
90
91       When reading and writing, all property descriptors, for example "color"
92       and "font-size" in the example above, are converted to lower case. As
93       an example, take the following CSS.
94
95           P {
96               Font-Family: Verdana;
97           }
98
99       To get the value 'Verdana' from the object $CSS, you should reference
100       the key "$CSS->{P}->{font-family}".
101

METHODS

103   new
104       The constructor "new" creates and returns an empty "CSS::Tiny" object.
105
106   read $filename
107       The "read" constructor reads a CSS stylesheet, and returns a new
108       "CSS::Tiny" object containing the properties in the file.
109
110       Returns the object on success, or "undef" on error.
111
112   read_string $string
113       The "read_string" constructor reads a CSS stylesheet from a string.
114
115       Returns the object on success, or "undef" on error.
116
117   clone
118       The "clone" method creates an identical copy of an existing "CSS::Tiny"
119       object.
120
121   write_string
122       Generates the stylesheet for the object and returns it as a string.
123
124   write
125       The "write $filename" generates the stylesheet for the properties, and
126       writes it to disk. Returns true on success. Returns "undef" on error.
127
128   html
129       The "html" method generates the CSS, but wrapped in a "style" HTML tag,
130       so that it can be dropped directly onto a HTML page.
131
132   xhtml
133       The "html" method generates the CSS, but wrapped in a "style" XHTML
134       tag, so that it can be dropped directly onto an XHTML page.
135
136   errstr
137       When an error occurs, you can retrieve the error message either from
138       the $CSS::Tiny::errstr variable, or using the "errstr" method.
139

CAVEATS

141   CSS Rule Order
142       While the order of rules in CSS is important, this is one of the
143       features that is sacrificed to keep things small and dependency-free.
144       If you need to preserve order yourself, we recommend that you upgrade
145       to the more powerful CSS module.
146
147       If this is not possible in your case, alternatively it can be done with
148       the help of another module such as Tie::IxHash:
149
150           my $css = CSS::Tiny->new;
151           tie %$css, 'Tie::IxHash';
152           $css->read('style.css');
153
154       Note: You will also need to remember to add the additional dependency
155       to your code or module in this case.
156

SUPPORT

158       Bugs should be reported via the CPAN bug tracker at
159
160       <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=CSS-Tiny>
161
162       For other issues, or commercial enhancement or support, contact the
163       author.
164

AUTHOR

166       Adam Kennedy <adamk@cpan.org>
167

SEE ALSO

169       CSS, <http://www.w3.org/TR/REC-CSS1>, Config::Tiny, <http://ali.as/>
170
172       Copyright 2002 - 2010 Adam Kennedy.
173
174       This program is free software; you can redistribute it and/or modify it
175       under the same terms as Perl itself.
176
177       The full text of the license can be found in the LICENSE file included
178       with this module.
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182perl v5.32.0                      2020-07-28                      CSS::Tiny(3)
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