1 files changed, 122 insertions, 0 deletions
diff --git a/lib/rdoc/ri/ri_driver.rb b/lib/rdoc/ri/ri_driver.rb
new file mode 100644
index 0000000000..0ca3b4c224
--- /dev/null
+++ b/lib/rdoc/ri/ri_driver.rb
@@ -0,0 +1,122 @@
+require 'rdoc/ri/ri_paths'
+require 'rdoc/ri/ri_cache'
+require 'rdoc/ri/ri_util'
+require 'rdoc/ri/ri_reader'
+require 'rdoc/ri/ri_formatter'
+require 'rdoc/ri/ri_options'
+
+
+######################################################################
+
+class  RiDriver
+
+  def initialize
+    @options = RI::Options.instance
+    @options.parse
+    paths = @options.paths || RI::Paths::PATH
+    if paths.empty?
+      $stderr.puts "No ri documentation found in:"
+      [ RI::Paths::SYSDIR, RI::Paths::SITEDIR, RI::Paths::HOMEDIR].each do |d|
+        $stderr.puts "     #{d}"
+      end
+      $stderr.puts "\nWas rdoc run to create documentation?"
+      exit 1                   
+    end
+    @ri_reader = RI::RiReader.new(RI::RiCache.new(paths))
+    @display   = @options.displayer
+  end    
+  
+  
+  
+  ######################################################################
+  
+  # If the list of matching methods contains exactly one entry, or
+  # if it contains an entry that exactly matches the requested method,
+  # then display that entry, otherwise display the list of
+  # matching method names
+  
+  def report_method_stuff(requested_method_name, methods)
+    if methods.size == 1
+      method = @ri_reader.get_method(methods[0])
+      @display.display_method_info(method)
+    else
+      entries = methods.find_all {|m| m.name == requested_method_name}
+      if entries.size == 1
+        method = @ri_reader.get_method(entries[0])
+        @display.display_method_info(method)
+      else
+        @display.display_method_list(methods)
+      end
+    end
+  end
+  
+  ######################################################################
+  
+  def report_class_stuff(requested_class_name, namespaces)
+    if namespaces.size == 1
+      klass = @ri_reader.get_class(namespaces[0])
+      @display.display_class_info(klass, @ri_reader)
+    else 
+      entries = namespaces.find_all {|m| m.full_name == requested_class_name}
+      if entries.size == 1
+        klass = @ri_reader.get_class(entries[0])
+        @display.display_class_info(klass, @ri_reader)
+      else
+        @display.display_class_list(namespaces)
+      end
+    end
+  end
+  
+  ######################################################################
+  
+  
+  def get_info_for(arg)
+    desc = NameDescriptor.new(arg)
+    
+    namespaces = @ri_reader.top_level_namespace
+    
+    for class_name in desc.class_names
+      namespaces = @ri_reader.lookup_namespace_in(class_name, namespaces)
+      if namespaces.empty?
+        raise RiError.new("Nothing known about #{arg}")
+      end
+    end
+    
+    if desc.method_name.nil?
+      report_class_stuff(desc.class_names.join('::'), namespaces)
+    else
+      methods = @ri_reader.find_methods(desc.method_name, 
+                                        desc.is_class_method,
+                                        namespaces)
+      
+      if methods.empty?
+        raise RiError.new("Nothing known about #{arg}")
+      else
+        report_method_stuff(desc.method_name, methods)
+      end
+    end
+  end
+
+  ######################################################################
+
+  def process_args
+    if @options.list_classes
+      classes = @ri_reader.class_names
+      @display.list_known_classes(classes)
+    else
+      if ARGV.size.zero?
+        @display.display_usage
+      else
+        begin
+          ARGV.each do |arg|
+            get_info_for(arg)
+          end
+        rescue RiError => e
+          $stderr.puts(e.message)
+          exit(1)
+        end
+      end
+    end
+  end
+
+end  # class RiDriver