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module ActionView #:nodoc:
class Template #:nodoc:
attr_accessor :locals
attr_reader :handler, :path, :extension, :filename, :path_without_extension, :method
def initialize(view, path, use_full_path, locals = {})
@view = view
@finder = @view.finder
# Clear the forward slash at the beginning if exists
@path = use_full_path ? path.sub(/^\//, '') : path
@view.first_render ||= @path
@source = nil # Don't read the source until we know that it is required
set_extension_and_file_name(use_full_path)
@locals = locals || {}
@handler = self.class.handler_class_for_extension(@extension).new(@view)
end
def render_template
render
rescue Exception => e
raise e unless filename
if TemplateError === e
e.sub_template_of(filename)
raise e
else
raise TemplateError.new(self, @view.assigns, e)
end
end
def render
prepare!
@handler.render(self)
end
def source
@source ||= File.read(self.filename)
end
def method_key
@filename
end
def base_path_for_exception
@finder.find_base_path_for("#{@path_without_extension}.#{@extension}") || @finder.view_paths.first
end
def prepare!
@view.send :evaluate_assigns
@view.current_render_extension = @extension
if @handler.compilable?
@handler.compile_template(self) # compile the given template, if necessary
@method = @view.method_names[method_key] # Set the method name for this template and run it
end
end
private
def set_extension_and_file_name(use_full_path)
@path_without_extension, @extension = @finder.path_and_extension(@path)
if use_full_path
if @extension
@filename = @finder.pick_template(@path_without_extension, @extension)
else
@extension = @finder.pick_template_extension(@path).to_s
raise_missing_template_exception unless @extension
@filename = @finder.pick_template(@path, @extension)
@extension = @extension.gsub(/^.+\./, '') # strip off any formats
end
else
@filename = @path
end
raise_missing_template_exception if @filename.blank?
end
def raise_missing_template_exception
full_template_path = @path.include?('.') ? @path : "#{@path}.#{@view.template_format}.erb"
display_paths = @finder.view_paths.join(':')
template_type = (@path =~ /layouts/i) ? 'layout' : 'template'
raise(MissingTemplate, "Missing #{template_type} #{full_template_path} in view path #{display_paths}")
end
# Template Handlers
@@template_handlers = HashWithIndifferentAccess.new
@@default_template_handlers = nil
# Register a class that knows how to handle template files with the given
# extension. This can be used to implement new template types.
# The constructor for the class must take the ActiveView::Base instance
# as a parameter, and the class must implement a #render method that
# takes the contents of the template to render as well as the Hash of
# local assigns available to the template. The #render method ought to
# return the rendered template as a string.
def self.register_template_handler(extension, klass)
@@template_handlers[extension.to_sym] = klass
TemplateFinder.update_extension_cache_for(extension.to_s)
end
def self.template_handler_extensions
@@template_handlers.keys.map(&:to_s).sort
end
def self.register_default_template_handler(extension, klass)
register_template_handler(extension, klass)
@@default_template_handlers = klass
end
def self.handler_class_for_extension(extension)
(extension && @@template_handlers[extension.to_sym]) || @@default_template_handlers
end
register_default_template_handler :erb, TemplateHandlers::ERB
register_template_handler :rjs, TemplateHandlers::RJS
register_template_handler :builder, TemplateHandlers::Builder
# TODO: Depreciate old template extensions
register_template_handler :rhtml, TemplateHandlers::ERB
register_template_handler :rxml, TemplateHandlers::Builder
end
end
|
