1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
# Ruby CSS Parser [](https://github.com/ojab/css_parser/actions?query=workflow%3A%22Run+css_parser+CI%22) [](https://badge.fury.io/rb/css_parser)
Load, parse and cascade CSS rule sets in Ruby.
# Setup
```Bash
gem install css_parser
```
# Usage
```Ruby
require 'css_parser'
include CssParser
parser = CssParser::Parser.new
parser.load_uri!('http://example.com/styles/style.css')
parser = CssParser::Parser.new
parser.load_uri!('file://home/user/styles/style.css')
# load a remote file, setting the base_uri and media_types
parser.load_uri!('../style.css', {base_uri: 'http://example.com/styles/inc/', media_types: [:screen, :handheld]})
# load a local file, setting the base_dir and media_types
parser.load_file!('print.css', '~/styles/', :print)
# load a string
parser = CssParser::Parser.new
parser.load_string! 'a { color: hotpink; }'
# lookup a rule by a selector
parser.find_by_selector('#content')
#=> 'font-size: 13px; line-height: 1.2;'
# lookup a rule by a selector and media type
parser.find_by_selector('#content', [:screen, :handheld])
# iterate through selectors by media type
parser.each_selector(:screen) do |selector, declarations, specificity|
...
end
# add a block of CSS
css = <<-EOT
body { margin: 0 1em; }
EOT
parser.add_block!(css)
# output all CSS rules in a single stylesheet
parser.to_s
=> #content { font-size: 13px; line-height: 1.2; }
body { margin: 0 1em; }
# capturing byte offsets within a file
parser.load_uri!('../style.css', {base_uri: 'http://example.com/styles/inc/', capture_offsets: true)
content_rule = parser.find_rule_sets(['#content']).first
content_rule.filename
#=> 'http://example.com/styles/styles.css'
content_rule.offset
#=> 10703..10752
# capturing byte offsets within a string
parser.load_string!('a { color: hotpink; }', {filename: 'index.html', capture_offsets: true)
content_rule = parser.find_rule_sets(['a']).first
content_rule.filename
#=> 'index.html'
content_rule.offset
#=> 0..21
```
# Testing
```Bash
bundle
bundle exec rake
```
Runs on Ruby 3.0/JRuby 9.4 or above.
# Credits
By Alex Dunae (dunae.ca, e-mail 'code' at the same domain), 2007-11.
License: MIT
Thanks to [all the wonderful contributors](http://github.com/premailer/css_parser/contributors) for their updates.
Made on Vancouver Island.
|
