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module ActionView #:nodoc:
# TemplateFile abstracts the pattern of querying a file path for its
# path with or without its extension. The path is only the partial path
# from the load path root e.g. "hello/index.html.erb" not
# "app/views/hello/index.html.erb"
class TemplateFile
def self.from_path(path)
path.is_a?(self) ? path : new(path)
end
def self.from_full_path(load_path, full_path)
file = new(full_path.split(load_path).last)
file.load_path = load_path
file.freeze
end
attr_accessor :load_path, :base_path, :name, :format, :extension
delegate :to_s, :inspect, :to => :path
def initialize(path)
path = path.dup
# Clear the forward slash in the beginning
trim_forward_slash!(path)
@base_path, @name, @format, @extension = split(path)
end
def freeze
@load_path.freeze
@base_path.freeze
@name.freeze
@format.freeze
@extension.freeze
super
end
def format_and_extension
extensions = [format, extension].compact.join(".")
extensions.blank? ? nil : extensions
end
def full_path
if load_path
"#{load_path}/#{path}"
else
path
end
end
def path
base_path.to_s + [name, format, extension].compact.join(".")
end
def path_without_extension
base_path.to_s + [name, format].compact.join(".")
end
def path_without_format_and_extension
"#{base_path}#{name}"
end
def dup_with_extension(extension)
file = dup
file.extension = extension ? extension.to_s : nil
file
end
private
def trim_forward_slash!(path)
path.sub!(/^\//, '')
end
# Returns file split into an array
# [base_path, name, format, extension]
def split(file)
if m = file.match(/^(.*\/)?(\w+)\.?(\w+)?\.?(\w+)?\.?(\w+)?$/)
if m[5] # Mulipart formats
[m[1], m[2], "#{m[3]}.#{m[4]}", m[5]]
elsif m[4] # Single format
[m[1], m[2], m[3], m[4]]
else # No format
[m[1], m[2], nil, m[3]]
end
end
end
end
end
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