Add Ckeditor::Rails.assets_base_path

README.md

@@ -96,7 +96,7 @@ ol,ul,dl {
 }
 ```
 
-### Configure plugins, languages, and skins of CKEditor assets
+### Configure plugins, languages, skins and base_path of CKEditor assets
 
 Add `ckeditor_rails.rb` to `config/initializers/`
 
@@ -112,6 +112,12 @@ Ckeditor::Rails.configure do |config|
 
   # default is nil for all skins, or set as %w[moono-lisa]
   config.assets_skins = nil
+
+  # default is nil and it will be "#{::Sprockets::Railtie.config.assets.prefix}/ckeditor",
+  # or set as String like '/assets/ckeditor',
+  # or set as Proc / Lambda
+  # no slash in the end
+  config.assets_base_path = nil
 end
 ```
 

lib/assets/javascripts/ckeditor/basepath.js.erb

@@ -1,6 +1 @@
-<%
-  base_path = File.join(Rails.application.config.assets.prefix, 'ckeditor/')
-  base_path = File.join(Rails.application.config.action_controller.relative_url_root, base_path) if Rails.application.config.action_controller.relative_url_root
-%>
-
-var CKEDITOR_BASEPATH = "<%= base_path %>";
+var CKEDITOR_BASEPATH = "<%= "#{::Ckeditor::Rails.assets_base_path}/" %>";

lib/ckeditor-rails.rb

@@ -12,6 +12,9 @@ module Rails
     mattr_accessor :assets_skins
     @@assets_skins = nil
 
+    mattr_writer :assets_base_path
+    @@assets_base_path = nil
+
     class << self
       def configure
         yield self
@@ -51,6 +54,27 @@ def default_plugins
       def default_skins
         %w[moono-lisa]
       end
+
+      def default_base_path
+        "#{::Sprockets::Railtie.config.assets.prefix}/ckeditor"
+      end
+
+      def assets_base_path
+        return @@assets_base_path unless @@assets_base_path.nil?
+
+        if @@assets_base_path.respond_to? :call
+          self.assets_base_path = @@assets_base_path.call
+        elsif !@@assets_base_path.is_a? String
+          self.assets_base_path = default_base_path
+        end
+
+        relative_path = ::Rails.application.config.action_controller.relative_url_root
+        self.assets_base_path = File.join(relative_path, @@assets_base_path) if relative_path && @@assets_base_path
+
+        self.assets_base_path = @@assets_base_path.sub(/\/\z/, '') if @@assets_base_path.ends_with?('/')
+
+        @@assets_base_path
+      end
     end
 
   end

lib/ckeditor-rails/asset_url_processor.rb

@@ -8,11 +8,17 @@ def self.stylesheet_files
         @stylesheet_files ||= ::Ckeditor::Rails::Asset.new.stylesheet_files
       end
 
+      def self.assets_base_path(context = nil)
+        return ::Ckeditor::Rails.assets_base_path unless context
+
+        "#{context.assets_prefix}/ckeditor"
+      end
+
       def self.call(input)
         return { data: input[:data] } unless stylesheet_files.include?(input[:filename])
 
         context = input[:environment].context_class.new(input)
-        path_prefix = "#{context.assets_prefix}/ckeditor"
+        path_prefix = assets_base_path()
         matched_folders = input[:filename].match(/\/ckeditor\/(plugins|skins)\/([\w-]+)\//)
 
         data = input[:data].gsub(REGEX) { |_match|