From 0d6e8edc2a47a4b4c6824936632bfb83850db343 Mon Sep 17 00:00:00 2001
From: Piotr Sarnacki <drogus@gmail.com>
Date: Sat, 4 May 2013 15:09:22 +0200
Subject: Move actionpack/lib/action_view* into actionview/lib

---
 actionview/lib/action_view/path_set.rb | 77 ++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 actionview/lib/action_view/path_set.rb

(limited to 'actionview/lib/action_view/path_set.rb')

diff --git a/actionview/lib/action_view/path_set.rb b/actionview/lib/action_view/path_set.rb
new file mode 100644
index 0000000000..91ee2ea8f5
--- /dev/null
+++ b/actionview/lib/action_view/path_set.rb
@@ -0,0 +1,77 @@
+module ActionView #:nodoc:
+  # = Action View PathSet
+  #
+  # This class is used to store and access paths in Action View. A number of
+  # operations are defined so that you can search among the paths in this
+  # set and also perform operations on other +PathSet+ objects.
+  #
+  # A +LookupContext+ will use a +PathSet+ to store the paths in its context.
+  class PathSet #:nodoc:
+    include Enumerable
+
+    attr_reader :paths
+
+    delegate :[], :include?, :pop, :size, :each, to: :paths
+
+    def initialize(paths = [])
+      @paths = typecast paths
+    end
+
+    def initialize_copy(other)
+      @paths = other.paths.dup
+      self
+    end
+
+    def to_ary
+      paths.dup
+    end
+
+    def compact
+      PathSet.new paths.compact
+    end
+
+    def +(array)
+      PathSet.new(paths + array)
+    end
+
+    %w(<< concat push insert unshift).each do |method|
+      class_eval <<-METHOD, __FILE__, __LINE__ + 1
+        def #{method}(*args)
+          paths.#{method}(*typecast(args))
+        end
+      METHOD
+    end
+
+    def find(*args)
+      find_all(*args).first || raise(MissingTemplate.new(self, *args))
+    end
+
+    def find_all(path, prefixes = [], *args)
+      prefixes = [prefixes] if String === prefixes
+      prefixes.each do |prefix|
+        paths.each do |resolver|
+          templates = resolver.find_all(path, prefix, *args)
+          return templates unless templates.empty?
+        end
+      end
+      []
+    end
+
+    def exists?(path, prefixes, *args)
+      find_all(path, prefixes, *args).any?
+    end
+
+    private
+
+    def typecast(paths)
+      paths.map do |path|
+        case path
+        when Pathname, String
+          OptimizedFileSystemResolver.new path.to_s
+        else
+          path
+        end
+      end
+    end
+  end
+end
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