Provides methods for linking a HTML page together with other assets, such as javascripts, stylesheets, and feeds.
Methods
Public Instance methods
Returns a link tag that browsers and news readers can use to auto-detect a RSS or ATOM feed for this page. The type can either be :rss (default) or :atom and the options follow the url_for style of declaring a link target.
Examples:
auto_discovery_link_tag # =>
<link rel="alternate" type="application/rss+xml" title="RSS" href="http://www.curenthost.com/controller/action" />
auto_discovery_link_tag(:atom) # =>
<link rel="alternate" type="application/atom+xml" title="ATOM" href="http://www.curenthost.com/controller/action" />
auto_discovery_link_tag(:rss, :action => "feed") # =>
<link rel="alternate" type="application/atom+xml" title="ATOM" href="http://www.curenthost.com/controller/feed" />
[ show source ]
# File vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb, line 19
19: def auto_discovery_link_tag(type = :rss, options = {})
20: tag(
21: "link", "rel" => "alternate", "type" => "application/#{type}+xml", "title" => type.to_s.upcase,
22: "href" => url_for(options.merge(:only_path => false))
23: )
24: end
Returns an image tag converting the options instead html options on the tag, but with these special cases:
- :alt - If no alt text is given, the file name part of the src is used (capitalized and without the extension)
- :size - Supplied as "XxY", so "30x45" becomes width="30" and height="45"
The src can be supplied as a…
- full path, like "/my_images/image.gif"
- file name, like "rss.gif", that gets expanded to "/images/rss.gif"
- file name without extension, like "logo", that gets expanded to "/images/logo.png"
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# File vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb, line 65
65: def image_tag(source, options = {})
66: options.symbolize_keys
67:
68: options[:src] = compute_public_path(source, 'images', 'png')
69: options[:alt] ||= source.split("/").last.split(".").first.capitalize
70:
71: if options[:size]
72: options[:width], options[:height] = options[:size].split("x")
73: options.delete :size
74: end
75:
76: tag("img", options)
77: end
Returns a script include tag per source given as argument. Examples:
javascript_include_tag "xmlhr" # =>
<script language="JavaScript" type="text/javascript" src="/javascripts/xmlhr.js"></script>
javascript_include_tag "common.javascript", "/elsewhere/cools" # =>
<script language="JavaScript" type="text/javascript" src="/javascripts/common.javascript"></script>
<script language="JavaScript" type="text/javascript" src="/elsewhere/cools.js"></script>
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# File vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb, line 34
34: def javascript_include_tag(*sources)
35: sources.collect { |source|
36: source = compute_public_path(source, 'javascripts', 'js')
37: content_tag("script", "", "language" => "JavaScript", "type" => "text/javascript", "src" => source)
38: }.join("\n")
39: end
Returns a css link tag per source given as argument. Examples:
stylesheet_link_tag "style" # =>
<link href="/stylesheets/style.css" media="screen" rel="Stylesheet" type="text/css" />
stylesheet_link_tag "random.styles", "/css/stylish" # =>
<link href="/stylesheets/random.styles" media="screen" rel="Stylesheet" type="text/css" />
<link href="/css/stylish.css" media="screen" rel="Stylesheet" type="text/css" />
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# File vendor/rails/actionpack/lib/action_view/helpers/asset_tag_helper.rb, line 49
49: def stylesheet_link_tag(*sources)
50: sources.collect { |source|
51: source = compute_public_path(source, 'stylesheets', 'css')
52: tag("link", "rel" => "Stylesheet", "type" => "text/css", "media" => "screen", "href" => source)
53: }.join("\n")
54: end