Add bin and edit workflow

bin/gems/liquid-4.0.4/lib/liquid/drop.rb

@@ -0,0 +1,78 @@
+require 'set'
+
+module Liquid
+  # A drop in liquid is a class which allows you to export DOM like things to liquid.
+  # Methods of drops are callable.
+  # The main use for liquid drops is to implement lazy loaded objects.
+  # If you would like to make data available to the web designers which you don't want loaded unless needed then
+  # a drop is a great way to do that.
+  #
+  # Example:
+  #
+  #   class ProductDrop < Liquid::Drop
+  #     def top_sales
+  #       Shop.current.products.find(:all, :order => 'sales', :limit => 10 )
+  #     end
+  #   end
+  #
+  #   tmpl = Liquid::Template.parse( ' {% for product in product.top_sales %} {{ product.name }} {%endfor%} '  )
+  #   tmpl.render('product' => ProductDrop.new ) # will invoke top_sales query.
+  #
+  # Your drop can either implement the methods sans any parameters
+  # or implement the liquid_method_missing(name) method which is a catch all.
+  class Drop
+    attr_writer :context
+
+    # Catch all for the method
+    def liquid_method_missing(method)
+      return nil unless @context && @context.strict_variables
+      raise Liquid::UndefinedDropMethod, "undefined method #{method}"
+    end
+
+    # called by liquid to invoke a drop
+    def invoke_drop(method_or_key)
+      if self.class.invokable?(method_or_key)
+        send(method_or_key)
+      else
+        liquid_method_missing(method_or_key)
+      end
+    end
+
+    def key?(_name)
+      true
+    end
+
+    def inspect
+      self.class.to_s
+    end
+
+    def to_liquid
+      self
+    end
+
+    def to_s
+      self.class.name
+    end
+
+    alias_method :[], :invoke_drop
+
+    # Check for method existence without invoking respond_to?, which creates symbols
+    def self.invokable?(method_name)
+      invokable_methods.include?(method_name.to_s)
+    end
+
+    def self.invokable_methods
+      @invokable_methods ||= begin
+        blacklist = Liquid::Drop.public_instance_methods + [:each]
+
+        if include?(Enumerable)
+          blacklist += Enumerable.public_instance_methods
+          blacklist -= [:sort, :count, :first, :min, :max, :include?]
+        end
+
+        whitelist = [:to_liquid] + (public_instance_methods - blacklist)
+        Set.new(whitelist.map(&:to_s))
+      end
+    end
+  end
+end