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1 | # The engines plugin makes it trivial to share public assets using plugins. |
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1 | # The engines plugin makes it trivial to share public assets using plugins. | |
2 | # To do this, include an <tt>assets</tt> directory within your plugin, and put |
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2 | # To do this, include an <tt>assets</tt> directory within your plugin, and put | |
3 | # your javascripts, stylesheets and images in subdirectories of that folder: |
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3 | # your javascripts, stylesheets and images in subdirectories of that folder: | |
4 | # |
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4 | # | |
5 | # my_plugin |
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5 | # my_plugin | |
6 | # |- init.rb |
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6 | # |- init.rb | |
7 | # |- lib/ |
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7 | # |- lib/ | |
8 | # |- assets/ |
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8 | # |- assets/ | |
9 | # |- javascripts/ |
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9 | # |- javascripts/ | |
10 | # | |- my_functions.js |
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10 | # | |- my_functions.js | |
11 | # | |
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11 | # | | |
12 | # |- stylesheets/ |
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12 | # |- stylesheets/ | |
13 | # | |- my_styles.css |
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13 | # | |- my_styles.css | |
14 | # | |
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14 | # | | |
15 | # |- images/ |
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15 | # |- images/ | |
16 | # |- my_face.jpg |
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16 | # |- my_face.jpg | |
17 | # |
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17 | # | |
18 | # Files within the <tt>asset</tt> structure are automatically mirrored into |
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18 | # Files within the <tt>asset</tt> structure are automatically mirrored into | |
19 | # a publicly-accessible folder each time your application starts (see |
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19 | # a publicly-accessible folder each time your application starts (see | |
20 | # Engines::Assets#mirror_assets). |
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20 | # Engines::Assets#mirror_assets). | |
21 | # |
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21 | # | |
22 | # |
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22 | # | |
23 | # == Using plugin assets in views |
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23 | # == Using plugin assets in views | |
24 | # |
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24 | # | |
25 | # It's also simple to use Rails' helpers in your views to use plugin assets. |
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25 | # It's also simple to use Rails' helpers in your views to use plugin assets. | |
26 | # The default helper methods have been enhanced by the engines plugin to accept |
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26 | # The default helper methods have been enhanced by the engines plugin to accept | |
27 | # a <tt>:plugin</tt> option, indicating the plugin containing the desired asset. |
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27 | # a <tt>:plugin</tt> option, indicating the plugin containing the desired asset. | |
28 | # |
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28 | # | |
29 | # For example, it's easy to use plugin assets in your layouts: |
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29 | # For example, it's easy to use plugin assets in your layouts: | |
30 | # |
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30 | # | |
31 | # <%= stylesheet_link_tag "my_styles", :plugin => "my_plugin", :media => "screen" %> |
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31 | # <%= stylesheet_link_tag "my_styles", :plugin => "my_plugin", :media => "screen" %> | |
32 | # <%= javascript_include_tag "my_functions", :plugin => "my_plugin" %> |
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32 | # <%= javascript_include_tag "my_functions", :plugin => "my_plugin" %> | |
33 | # |
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33 | # | |
34 | # ... and similarly in views and partials, it's easy to use plugin images: |
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34 | # ... and similarly in views and partials, it's easy to use plugin images: | |
35 | # |
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35 | # | |
36 | # <%= image_tag "my_face", :plugin => "my_plugin" %> |
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36 | # <%= image_tag "my_face", :plugin => "my_plugin" %> | |
37 | # <!-- or --> |
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37 | # <!-- or --> | |
38 | # <%= image_path "my_face", :plugin => "my_plugin" %> |
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38 | # <%= image_path "my_face", :plugin => "my_plugin" %> | |
39 | # |
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39 | # | |
40 | # Where the default helpers allow the specification of more than one file (i.e. the |
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40 | # Where the default helpers allow the specification of more than one file (i.e. the | |
41 | # javascript and stylesheet helpers), you can do similarly for multiple assets from |
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41 | # javascript and stylesheet helpers), you can do similarly for multiple assets from | |
42 | # within a single plugin. |
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42 | # within a single plugin. | |
43 | # |
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43 | # | |
44 | # --- |
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44 | # --- | |
45 | # |
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45 | # | |
46 | # This module enhances four of the methods from ActionView::Helpers::AssetTagHelper: |
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46 | # This module enhances four of the methods from ActionView::Helpers::AssetTagHelper: | |
47 | # |
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47 | # | |
48 | # * stylesheet_link_tag |
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48 | # * stylesheet_link_tag | |
49 | # * javascript_include_tag |
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49 | # * javascript_include_tag | |
50 | # * image_path |
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50 | # * image_path | |
51 | # * image_tag |
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51 | # * image_tag | |
52 | # |
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52 | # | |
53 | # Each one of these methods now accepts the key/value pair <tt>:plugin => "plugin_name"</tt>, |
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53 | # Each one of these methods now accepts the key/value pair <tt>:plugin => "plugin_name"</tt>, | |
54 | # which can be used to specify the originating plugin for any assets. |
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54 | # which can be used to specify the originating plugin for any assets. | |
55 | # |
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55 | # | |
56 | module Engines::RailsExtensions::AssetHelpers |
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56 | module Engines::RailsExtensions::AssetHelpers | |
57 | def self.included(base) #:nodoc: |
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57 | def self.included(base) #:nodoc: | |
58 | base.class_eval do |
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58 | base.class_eval do | |
59 | [:stylesheet_link_tag, :javascript_include_tag, :image_path, :image_tag].each do |m| |
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59 | [:stylesheet_link_tag, :javascript_include_tag, :image_path, :image_tag].each do |m| | |
60 | alias_method_chain m, :engine_additions |
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60 | alias_method_chain m, :engine_additions | |
61 | end |
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61 | end | |
62 | end |
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62 | end | |
63 | end |
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63 | end | |
64 |
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64 | |||
65 | # Adds plugin functionality to Rails' default stylesheet_link_tag method. |
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65 | # Adds plugin functionality to Rails' default stylesheet_link_tag method. | |
66 | def stylesheet_link_tag_with_engine_additions(*sources) |
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66 | def stylesheet_link_tag_with_engine_additions(*sources) | |
67 | stylesheet_link_tag_without_engine_additions(*Engines::RailsExtensions::AssetHelpers.pluginify_sources("stylesheets", *sources)) |
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67 | stylesheet_link_tag_without_engine_additions(*Engines::RailsExtensions::AssetHelpers.pluginify_sources("stylesheets", *sources)) | |
68 | end |
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68 | end | |
69 |
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69 | |||
70 | # Adds plugin functionality to Rails' default javascript_include_tag method. |
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70 | # Adds plugin functionality to Rails' default javascript_include_tag method. | |
71 | def javascript_include_tag_with_engine_additions(*sources) |
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71 | def javascript_include_tag_with_engine_additions(*sources) | |
72 | javascript_include_tag_without_engine_additions(*Engines::RailsExtensions::AssetHelpers.pluginify_sources("javascripts", *sources)) |
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72 | javascript_include_tag_without_engine_additions(*Engines::RailsExtensions::AssetHelpers.pluginify_sources("javascripts", *sources)) | |
73 | end |
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73 | end | |
74 |
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74 | |||
75 | #-- |
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75 | #-- | |
76 | # Our modified image_path now takes a 'plugin' option, though it doesn't require it |
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76 | # Our modified image_path now takes a 'plugin' option, though it doesn't require it | |
77 | #++ |
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77 | #++ | |
78 |
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78 | |||
79 | # Adds plugin functionality to Rails' default image_path method. |
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79 | # Adds plugin functionality to Rails' default image_path method. | |
80 | def image_path_with_engine_additions(source, options={}) |
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80 | def image_path_with_engine_additions(source, options={}) | |
81 | options.stringify_keys! |
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81 | options.stringify_keys! | |
82 | source = Engines::RailsExtensions::AssetHelpers.plugin_asset_path(options["plugin"], "images", source) if options["plugin"] |
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82 | source = Engines::RailsExtensions::AssetHelpers.plugin_asset_path(options["plugin"], "images", source) if options["plugin"] | |
83 | image_path_without_engine_additions(source) |
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83 | image_path_without_engine_additions(source) | |
84 | end |
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84 | end | |
85 |
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85 | |||
86 | # Adds plugin functionality to Rails' default image_tag method. |
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86 | # Adds plugin functionality to Rails' default image_tag method. | |
87 | def image_tag_with_engine_additions(source, options={}) |
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87 | def image_tag_with_engine_additions(source, options={}) | |
88 | options.stringify_keys! |
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88 | options.stringify_keys! | |
89 | if options["plugin"] |
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89 | if options["plugin"] | |
90 | source = Engines::RailsExtensions::AssetHelpers.plugin_asset_path(options["plugin"], "images", source) |
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90 | source = Engines::RailsExtensions::AssetHelpers.plugin_asset_path(options["plugin"], "images", source) | |
91 | options.delete("plugin") |
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91 | options.delete("plugin") | |
92 | end |
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92 | end | |
93 | image_tag_without_engine_additions(source, options) |
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93 | image_tag_without_engine_additions(source, options) | |
94 | end |
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94 | end | |
95 |
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95 | |||
96 | #-- |
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96 | #-- | |
97 | # The following are methods on this module directly because of the weird-freaky way |
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97 | # The following are methods on this module directly because of the weird-freaky way | |
98 | # Rails creates the helper instance that views actually get |
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98 | # Rails creates the helper instance that views actually get | |
99 | #++ |
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99 | #++ | |
100 |
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100 | |||
101 | # Convert sources to the paths for the given plugin, if any plugin option is given |
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101 | # Convert sources to the paths for the given plugin, if any plugin option is given | |
102 | def self.pluginify_sources(type, *sources) |
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102 | def self.pluginify_sources(type, *sources) | |
103 | options = sources.last.is_a?(Hash) ? sources.pop.stringify_keys : { } |
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103 | options = sources.last.is_a?(Hash) ? sources.pop.stringify_keys : { } | |
104 | sources.map! { |s| plugin_asset_path(options["plugin"], type, s) } if options["plugin"] |
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104 | sources.map! { |s| plugin_asset_path(options["plugin"], type, s) } if options["plugin"] | |
105 | options.delete("plugin") # we don't want it appearing in the HTML |
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105 | options.delete("plugin") # we don't want it appearing in the HTML | |
106 | sources << options # re-add options |
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106 | sources << options # re-add options | |
107 | end |
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107 | end | |
108 |
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108 | |||
109 | # Returns the publicly-addressable relative URI for the given asset, type and plugin |
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109 | # Returns the publicly-addressable relative URI for the given asset, type and plugin | |
110 | def self.plugin_asset_path(plugin_name, type, asset) |
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110 | def self.plugin_asset_path(plugin_name, type, asset) | |
111 | raise "No plugin called '#{plugin_name}' - please use the full name of a loaded plugin." if Engines.plugins[plugin_name].nil? |
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111 | raise "No plugin called '#{plugin_name}' - please use the full name of a loaded plugin." if Engines.plugins[plugin_name].nil? | |
112 | "/#{Engines.plugins[plugin_name].public_asset_directory}/#{type}/#{asset}" |
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112 | "#{ActionController::Base.relative_url_root}/#{Engines.plugins[plugin_name].public_asset_directory}/#{type}/#{asset}" | |
113 | end |
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113 | end | |
114 |
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114 | |||
115 | end |
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115 | end | |
116 |
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116 | |||
117 | module ::ActionView::Helpers::AssetTagHelper #:nodoc: |
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117 | module ::ActionView::Helpers::AssetTagHelper #:nodoc: | |
118 | include Engines::RailsExtensions::AssetHelpers |
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118 | include Engines::RailsExtensions::AssetHelpers | |
119 | end No newline at end of file |
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119 | end |
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