68 lines
2.5 KiB
Ruby
68 lines
2.5 KiB
Ruby
module ActionView #:nodoc:
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module TemplateHandlers #:nodoc:
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autoload :ERB, 'action_view/template_handlers/erb'
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autoload :RJS, 'action_view/template_handlers/rjs'
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autoload :Builder, 'action_view/template_handlers/builder'
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def self.extended(base)
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base.register_default_template_handler :erb, TemplateHandlers::ERB
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base.register_template_handler :rjs, TemplateHandlers::RJS
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base.register_template_handler :builder, TemplateHandlers::Builder
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# TODO: Depreciate old template extensions
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base.register_template_handler :rhtml, TemplateHandlers::ERB
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base.register_template_handler :rxml, TemplateHandlers::Builder
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end
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@@template_handlers = {}
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@@default_template_handlers = nil
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# Register a class that knows how to handle template files with the given
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# extension. This can be used to implement new template types.
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# The constructor for the class must take the ActiveView::Base instance
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# as a parameter, and the class must implement a +render+ method that
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# takes the contents of the template to render as well as the Hash of
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# local assigns available to the template. The +render+ method ought to
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# return the rendered template as a string.
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def register_template_handler(extension, klass)
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@@template_handlers[extension.to_sym] = klass
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end
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def valid_extension?(extension)
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template_handler_extensions.include?(extension) || init_path_for_extension(extension)
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end
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def template_handler_extensions
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@@template_handlers.keys.map(&:to_s).sort
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end
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def register_default_template_handler(extension, klass)
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register_template_handler(extension, klass)
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@@default_template_handlers = klass
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end
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def handler_class_for_extension(extension)
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(extension && @@template_handlers[extension.to_sym] || autoload_handler_class(extension)) ||
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@@default_template_handlers
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end
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private
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def autoload_handler_class(extension)
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return if Gem.loaded_specs[extension]
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return unless init_path = init_path_for_extension(extension)
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Gem.activate(extension)
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load(init_path)
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handler_class_for_extension(extension)
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end
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# Returns the path to the rails/init.rb file for the given extension,
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# or nil if no gem provides it.
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def init_path_for_extension(extension)
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return unless spec = Gem.searcher.find(extension.to_s)
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returning File.join(spec.full_gem_path, 'rails', 'init.rb') do |path|
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return unless File.file?(path)
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end
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end
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end
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end
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