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106 lines
3 KiB
Ruby
106 lines
3 KiB
Ruby
require "pathname"
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require "active_support/core_ext/class"
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require "action_view/template"
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module ActionView
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class Resolver
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def initialize
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@cached = Hash.new { |h1,k1| h1[k1] =
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Hash.new { |h2,k2| h2[k2] = Hash.new { |h3, k3| h3[k3] = {} } } }
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end
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def clear_cache
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@cached.clear
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end
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# Normalizes the arguments and passes it on to find_template.
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def find_all(name, prefix=nil, partial=false, details={}, key=nil)
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cached(key, prefix, name, partial) do
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find_templates(name, prefix, partial, details)
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end
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end
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private
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def caching?
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@caching ||= !defined?(Rails.application) || Rails.application.config.cache_classes
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end
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# This is what child classes implement. No defaults are needed
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# because Resolver guarantees that the arguments are present and
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# normalized.
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def find_templates(name, prefix, partial, details)
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raise NotImplementedError
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end
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def cached(key, prefix, name, partial)
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return yield unless key && caching?
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@cached[key][prefix][name][partial] ||= yield
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end
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end
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class PathResolver < Resolver
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EXTENSION_ORDER = [:locale, :formats, :handlers]
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def to_s
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@path.to_s
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end
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alias :to_path :to_s
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private
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def find_templates(name, prefix, partial, details)
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path = build_path(name, prefix, partial, details)
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query(path, EXTENSION_ORDER.map { |ext| details[ext] }, details[:formats])
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end
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def build_path(name, prefix, partial, details)
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path = ""
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path << "#{prefix}/" unless prefix.empty?
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path << (partial ? "_#{name}" : name)
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path
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end
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def query(path, exts, formats)
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query = File.join(@path, path)
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exts.each do |ext|
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query << '{' << ext.map {|e| e && ".#{e}" }.join(',') << ',}'
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end
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Dir[query].reject { |p| File.directory?(p) }.map do |p|
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handler, format = extract_handler_and_format(p, formats)
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Template.new(File.read(p), File.expand_path(p), handler,
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:virtual_path => path, :format => format)
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end
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end
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# Extract handler and formats from path. If a format cannot be a found neither
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# from the path, or the handler, we should return the array of formats given
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# to the resolver.
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def extract_handler_and_format(path, default_formats)
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pieces = File.basename(path).split(".")
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pieces.shift
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handler = Template.handler_class_for_extension(pieces.pop)
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format = pieces.last && Mime[pieces.last] && pieces.pop.to_sym
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format ||= handler.default_format if handler.respond_to?(:default_format)
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format ||= default_formats
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[handler, format]
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end
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end
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class FileSystemResolver < PathResolver
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def initialize(path)
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raise ArgumentError, "path already is a Resolver class" if path.is_a?(Resolver)
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super()
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@path = Pathname.new(path).expand_path
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end
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def eql?(resolver)
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self.class.equal?(resolver.class) && to_path == resolver.to_path
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end
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alias :== :eql?
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end
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end
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