[macruby-changes] [4863] DietRB/trunk

[source_changes at macosforge.org]

Revision: 4863
          http://trac.macosforge.org/projects/ruby/changeset/4863
Author:   eloy.de.enige at gmail.com
Date:     2010-10-31 17:10:39 -0700 (Sun, 31 Oct 2010)
Log Message:
-----------
Add an idea about handling config at some point.

Modified Paths:
--------------
    DietRB/trunk/TODO

Added Paths:
-----------
    DietRB/trunk/config_prototype.rb

Modified: DietRB/trunk/TODO
===================================================================
--- DietRB/trunk/TODO	2010-10-31 23:03:17 UTC (rev 4862)
+++ DietRB/trunk/TODO	2010-11-01 00:10:39 UTC (rev 4863)
@@ -6,3 +6,9 @@
 * Make sure the following formatters work: hirb, and looksee
 * Make sure the majority of the utils in utility_belt work
 * Possibly add copy-paste support as an ext
+
+= Config
+
+Add a global config. Modules such as the formatter can register options with it.
+The modules must always check the global config, unless the option has been
+explicitely overriden on the module instance. See config_prototype.rb

Added: DietRB/trunk/config_prototype.rb
===================================================================
--- DietRB/trunk/config_prototype.rb	                        (rev 0)
+++ DietRB/trunk/config_prototype.rb	2010-11-01 00:10:39 UTC (rev 4863)
@@ -0,0 +1,86 @@
+class Config
+  class Entry
+    attr_accessor :klass, :name, :options
+
+    def initialize(klass, name)
+      @klass, @name = klass, name
+      @options = {}
+    end
+
+    def add_option(name, default, description)
+      name = name.to_s
+      @options[name] = [default, description]
+      klass.class_eval(%{
+        attr_writer :#{name}
+        def #{name}
+          @#{name}.nil? ? Config.current.#{@name}.#{name} : @#{name}
+        end
+      })
+    end
+
+    def to_s
+      @options.keys.sort.map do |name|
+        "config.#{@name}.#{name} = #{@options[name][0]} # #{@options[name][1]}"
+      end.join("\n")
+    end
+
+    def method_missing(name, *args)
+      name = name.to_s
+      if name[-1,1] == '=' && option = @options[name[0..-1]]
+        option[0] = args[0]
+      elsif option = @options[name]
+        option[0]
+      else
+        super
+      end
+    end
+  end
+
+  def self.current
+    @current ||= new
+  end
+
+  attr_accessor :entries
+
+  def initialize
+    @entries = {}
+  end
+
+  def add_entry(klass, name)
+    name = name.to_s
+    entry = Entry.new(klass, name)
+    yield entry
+    @entries[name] = entry
+  end
+
+  def to_s
+    @entries.keys.sort.map do |name|
+      @entries[name].to_s
+    end.join("\n")
+  end
+
+  def method_missing(entry)
+    @entries[entry.to_s] || super
+  end
+end
+
+module Kernel
+  def config
+    Config.current
+  end
+end
+
+class Formatter
+  Config.current.add_entry(self, :formatter) do |entry|
+    entry.add_option(:use_inspect, true, "Call inspect on the object")
+    entry.add_option(:auto_indent, true, "Automatically indent code")
+  end
+end
+
+puts config
+
+f = Formatter.new
+p f.use_inspect
+f.use_inspect = false
+p f.use_inspect
+p f.auto_indent
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