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106 lines
No EOL
3.2 KiB
Ruby
106 lines
No EOL
3.2 KiB
Ruby
module AbstractController
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module Layouts
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extend ActiveSupport::DependencyModule
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depends_on Renderer
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included do
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extlib_inheritable_accessor :_layout_conditions
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self._layout_conditions = {}
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end
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module ClassMethods
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def layout(layout, conditions = {})
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unless [String, Symbol, FalseClass, NilClass].include?(layout.class)
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raise ArgumentError, "Layouts must be specified as a String, Symbol, false, or nil"
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end
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conditions.each {|k, v| conditions[k] = Array(v).map {|a| a.to_s} }
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self._layout_conditions = conditions
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@_layout = layout || false # Converts nil to false
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_write_layout_method
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end
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def _implied_layout_name
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name.underscore
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end
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# Takes the specified layout and creates a _layout method to be called
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# by _default_layout
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#
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# If the specified layout is a:
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# String:: return the string
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# Symbol:: call the method specified by the symbol
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# false:: return nil
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# none:: If a layout is found in the view paths with the controller's
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# name, return that string. Otherwise, use the superclass'
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# layout (which might also be implied)
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def _write_layout_method
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case @_layout
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when String
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self.class_eval %{def _layout() #{@_layout.inspect} end}
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when Symbol
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self.class_eval %{def _layout() #{@_layout} end}
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when false
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self.class_eval %{def _layout() end}
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else
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self.class_eval %{
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def _layout
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if view_paths.find_by_parts?("#{_implied_layout_name}", {:formats => formats}, "layouts")
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"#{_implied_layout_name}"
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else
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super
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end
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end
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}
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end
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end
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end
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private
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def _layout() end # This will be overwritten
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# :api: plugin
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# ====
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# Override this to mutate the inbound layout name
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def _layout_for_name(name, details = {:formats => formats})
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unless [String, FalseClass, NilClass].include?(name.class)
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raise ArgumentError, "String, false, or nil expected; you passed #{name.inspect}"
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end
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name && view_paths.find_by_parts(name, details, _layout_prefix(name))
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end
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# TODO: Decide if this is the best hook point for the feature
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def _layout_prefix(name)
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"layouts"
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end
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def _default_layout(require_layout = false, details = {:formats => formats})
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if require_layout && _action_has_layout? && !_layout
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raise ArgumentError,
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"There was no default layout for #{self.class} in #{view_paths.inspect}"
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end
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begin
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_layout_for_name(_layout, details) if _action_has_layout?
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rescue NameError => e
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raise NoMethodError,
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"You specified #{@_layout.inspect} as the layout, but no such method was found"
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end
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end
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def _action_has_layout?
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conditions = _layout_conditions
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if only = conditions[:only]
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only.include?(action_name)
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elsif except = conditions[:except]
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!except.include?(action_name)
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else
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true
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end
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end
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end
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end |