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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
require 'active_support/concern'
require 'active_support/hash_with_indifferent_access'
require 'action_view/helpers/url_helper'
require 'action_view/helpers/tag_helper'
require 'action_view/helpers/asset_tag_helpers/common_asset_helpers'
module ActionView
module Helpers
module AssetTagHelper
module BaseAssetHelpers
extend HelperMacros
include CommonAssetHelpers
# Returns a link tag that browsers and news readers can use to auto-detect
# an RSS or ATOM feed. The +type+ can either be <tt>:rss</tt> (default) or
# <tt>:atom</tt>. Control the link options in url_for format using the
# +url_options+. You can modify the LINK tag itself in +tag_options+.
#
# ==== Options
# * <tt>:rel</tt> - Specify the relation of this link, defaults to "alternate"
# * <tt>:type</tt> - Override the auto-generated mime type
# * <tt>:title</tt> - Specify the title of the link, defaults to the +type+
#
# ==== Examples
# auto_discovery_link_tag # =>
# <link rel="alternate" type="application/rss+xml" title="RSS" href="http://www.currenthost.com/controller/action" />
# auto_discovery_link_tag(:atom) # =>
# <link rel="alternate" type="application/atom+xml" title="ATOM" href="http://www.currenthost.com/controller/action" />
# auto_discovery_link_tag(:rss, {:action => "feed"}) # =>
# <link rel="alternate" type="application/rss+xml" title="RSS" href="http://www.currenthost.com/controller/feed" />
# auto_discovery_link_tag(:rss, {:action => "feed"}, {:title => "My RSS"}) # =>
# <link rel="alternate" type="application/rss+xml" title="My RSS" href="http://www.currenthost.com/controller/feed" />
# auto_discovery_link_tag(:rss, {:controller => "news", :action => "feed"}) # =>
# <link rel="alternate" type="application/rss+xml" title="RSS" href="http://www.currenthost.com/news/feed" />
# auto_discovery_link_tag(:rss, "http://www.example.com/feed.rss", {:title => "Example RSS"}) # =>
# <link rel="alternate" type="application/rss+xml" title="Example RSS" href="http://www.example.com/feed" />
def auto_discovery_link_tag(type = :rss, url_options = {}, tag_options = {})
tag(
"link",
"rel" => tag_options[:rel] || "alternate",
"type" => tag_options[:type] || Mime::Type.lookup_by_extension(type.to_s).to_s,
"title" => tag_options[:title] || type.to_s.upcase,
"href" => url_options.is_a?(Hash) ? url_for(url_options.merge(:only_path => false)) : url_options
)
end
# Web browsers cache favicons. If you just throw a <tt>favicon.ico</tt> into the document
# root of your application and it changes later, clients that have it in their cache
# won't see the update. Using this helper prevents that because it appends an asset ID:
#
# <%= favicon_link_tag %>
#
# generates
#
# <link href="/favicon.ico?4649789979" rel="shortcut icon" type="image/vnd.microsoft.icon" />
#
# You may specify a different file in the first argument:
#
# <%= favicon_link_tag 'favicon.ico' %>
#
# That's passed to +path_to_image+ as is, so it gives
#
# <link href="/images/favicon.ico?4649789979" rel="shortcut icon" type="image/vnd.microsoft.icon" />
#
# The helper accepts an additional options hash where you can override "rel" and "type".
#
# For example, Mobile Safari looks for a different LINK tag, pointing to an image that
# will be used if you add the page to the home screen of an iPod Touch, iPhone, or iPad.
# The following call would generate such a tag:
#
# <%= favicon_link_tag 'mb-icon.png', :rel => 'apple-touch-icon', :type => 'image/png' %>
#
def favicon_link_tag(source='/favicon.ico', options={})
tag('link', {
:rel => 'shortcut icon',
:type => 'image/vnd.microsoft.icon',
:href => path_to_image(source)
}.merge(options.symbolize_keys))
end
# Computes the path to an image asset in the public images directory.
# Full paths from the document root will be passed through.
# Used internally by +image_tag+ to build the image path:
#
# image_path("edit") # => "/images/edit"
# image_path("edit.png") # => "/images/edit.png"
# image_path("icons/edit.png") # => "/images/icons/edit.png"
# image_path("/icons/edit.png") # => "/icons/edit.png"
# image_path("http://www.railsapplication.com/img/edit.png") # => "http://www.railsapplication.com/img/edit.png"
#
# If you have images as application resources this method may conflict with their named routes.
# The alias +path_to_image+ is provided to avoid that. Rails uses the alias internally, and
# plugin authors are encouraged to do so.
asset_path :image
# Computes the path to a video asset in the public videos directory.
# Full paths from the document root will be passed through.
# Used internally by +video_tag+ to build the video path.
#
# ==== Examples
# video_path("hd") # => /videos/hd
# video_path("hd.avi") # => /videos/hd.avi
# video_path("trailers/hd.avi") # => /videos/trailers/hd.avi
# video_path("/trailers/hd.avi") # => /trailers/hd.avi
# video_path("http://www.railsapplication.com/vid/hd.avi") # => http://www.railsapplication.com/vid/hd.avi
asset_path :video
# Computes the path to an audio asset in the public audios directory.
# Full paths from the document root will be passed through.
# Used internally by +audio_tag+ to build the audio path.
#
# ==== Examples
# audio_path("horse") # => /audios/horse
# audio_path("horse.wav") # => /audios/horse.wav
# audio_path("sounds/horse.wav") # => /audios/sounds/horse.wav
# audio_path("/sounds/horse.wav") # => /sounds/horse.wav
# audio_path("http://www.railsapplication.com/sounds/horse.wav") # => http://www.railsapplication.com/sounds/horse.wav
asset_path :audio
# Returns an html image tag for the +source+. The +source+ can be a full
# path or a file that exists in your public images directory.
#
# ==== Options
# You can add HTML attributes using the +options+. The +options+ supports
# three additional keys for convenience and conformance:
#
# * <tt>:alt</tt> - If no alt text is given, the file name part of the
# +source+ is used (capitalized and without the extension)
# * <tt>:size</tt> - Supplied as "{Width}x{Height}", so "30x45" becomes
# width="30" and height="45". <tt>:size</tt> will be ignored if the
# value is not in the correct format.
# * <tt>:mouseover</tt> - Set an alternate image to be used when the onmouseover
# event is fired, and sets the original image to be replaced onmouseout.
# This can be used to implement an easy image toggle that fires on onmouseover.
#
# ==== Examples
# image_tag("icon") # =>
# <img src="/images/icon" alt="Icon" />
# image_tag("icon.png") # =>
# <img src="/images/icon.png" alt="Icon" />
# image_tag("icon.png", :size => "16x10", :alt => "Edit Entry") # =>
# <img src="/images/icon.png" width="16" height="10" alt="Edit Entry" />
# image_tag("/icons/icon.gif", :size => "16x16") # =>
# <img src="/icons/icon.gif" width="16" height="16" alt="Icon" />
# image_tag("/icons/icon.gif", :height => '32', :width => '32') # =>
# <img alt="Icon" height="32" src="/icons/icon.gif" width="32" />
# image_tag("/icons/icon.gif", :class => "menu_icon") # =>
# <img alt="Icon" class="menu_icon" src="/icons/icon.gif" />
# image_tag("mouse.png", :mouseover => "/images/mouse_over.png") # =>
# <img src="/images/mouse.png" onmouseover="this.src='/images/mouse_over.png'" onmouseout="this.src='/images/mouse.png'" alt="Mouse" />
# image_tag("mouse.png", :mouseover => image_path("mouse_over.png")) # =>
# <img src="/images/mouse.png" onmouseover="this.src='/images/mouse_over.png'" onmouseout="this.src='/images/mouse.png'" alt="Mouse" />
def image_tag(source, options = {})
options.symbolize_keys!
src = options[:src] = path_to_image(source)
unless src =~ /^cid:/
options[:alt] = options.fetch(:alt){ File.basename(src, '.*').capitalize }
end
if size = options.delete(:size)
options[:width], options[:height] = size.split("x") if size =~ %r{^\d+x\d+$}
end
if mouseover = options.delete(:mouseover)
options[:onmouseover] = "this.src='#{path_to_image(mouseover)}'"
options[:onmouseout] = "this.src='#{src}'"
end
tag("img", options)
end
# Returns an html video tag for the +sources+. If +sources+ is a string,
# a single video tag will be returned. If +sources+ is an array, a video
# tag with nested source tags for each source will be returned. The
# +sources+ can be full paths or files that exists in your public videos
# directory.
#
# ==== Options
# You can add HTML attributes using the +options+. The +options+ supports
# two additional keys for convenience and conformance:
#
# * <tt>:poster</tt> - Set an image (like a screenshot) to be shown
# before the video loads. The path is calculated like the +src+ of +image_tag+.
# * <tt>:size</tt> - Supplied as "{Width}x{Height}", so "30x45" becomes
# width="30" and height="45". <tt>:size</tt> will be ignored if the
# value is not in the correct format.
#
# ==== Examples
# video_tag("trailer") # =>
# <video src="/videos/trailer" />
# video_tag("trailer.ogg") # =>
# <video src="/videos/trailer.ogg" />
# video_tag("trailer.ogg", :controls => true, :autobuffer => true) # =>
# <video autobuffer="autobuffer" controls="controls" src="/videos/trailer.ogg" />
# video_tag("trailer.m4v", :size => "16x10", :poster => "screenshot.png") # =>
# <video src="/videos/trailer.m4v" width="16" height="10" poster="/images/screenshot.png" />
# video_tag("/trailers/hd.avi", :size => "16x16") # =>
# <video src="/trailers/hd.avi" width="16" height="16" />
# video_tag("/trailers/hd.avi", :height => '32', :width => '32') # =>
# <video height="32" src="/trailers/hd.avi" width="32" />
# video_tag(["trailer.ogg", "trailer.flv"]) # =>
# <video><source src="trailer.ogg" /><source src="trailer.ogg" /><source src="trailer.flv" /></video>
# video_tag(["trailer.ogg", "trailer.flv"] :size => "160x120") # =>
# <video height="120" width="160"><source src="trailer.ogg" /><source src="trailer.flv" /></video>
def video_tag(sources, options = {})
options.symbolize_keys!
options[:poster] = path_to_image(options[:poster]) if options[:poster]
if size = options.delete(:size)
options[:width], options[:height] = size.split("x") if size =~ %r{^\d+x\d+$}
end
if sources.is_a?(Array)
content_tag("video", options) do
sources.map { |source| tag("source", :src => source) }.join.html_safe
end
else
options[:src] = path_to_video(sources)
tag("video", options)
end
end
# Returns an html audio tag for the +source+.
# The +source+ can be full path or file that exists in
# your public audios directory.
#
# ==== Examples
# audio_tag("sound") # =>
# <audio src="/audios/sound" />
# audio_tag("sound.wav") # =>
# <audio src="/audios/sound.wav" />
# audio_tag("sound.wav", :autoplay => true, :controls => true) # =>
# <audio autoplay="autoplay" controls="controls" src="/audios/sound.wav" />
def audio_tag(source, options = {})
options.symbolize_keys!
options[:src] = path_to_audio(source)
tag("audio", options)
end
end
end
end
end
|
