This commit was manufactured by cvs2svn to create branch 'ruby_1_8'.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@5387 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 376 insertions, 0 deletions

diff --git a/lib/rdoc/ri/ri_display.rb b/lib/rdoc/ri/ri_display.rb
new file mode 100644
index 0000000000..6899fe165a
--- /dev/null
+++ b/lib/rdoc/ri/ri_display.rb
@@ -0,0 +1,254 @@
+require 'rdoc/ri/ri_util'
+require 'rdoc/ri/ri_formatter'
+require 'rdoc/ri/ri_options'
+
+
+# This is a kind of 'flag' module. If you want to write your
+# own 'ri' display module (perhaps because you'r writing
+# an IDE or somesuch beast), you simply write a class
+# which implements the various 'display' methods in 'DefaultDisplay',
+# and include the 'RiDisplay' module in that class. 
+#
+# To access your class from the command line, you can do
+#
+#    ruby -r <your source file>  ../ri ....
+#
+# If folks _really_ want to do this from the command line,
+# I'll build an option in
+
+module RiDisplay
+  @@display_class = nil
+
+  def RiDisplay.append_features(display_class)
+    @@display_class = display_class
+  end
+
+  def RiDisplay.new(*args)
+    @@display_class.new(*args)
+  end
+end
+
+######################################################################
+#
+# A paging display module. Uses the ri_formatter class to do the
+# actual presentation
+#
+
+class  DefaultDisplay
+
+  include RiDisplay
+
+  def initialize(options)
+    @options = options
+    @formatter = @options.formatter.new(@options, "     ")
+  end    
+  
+  
+  ######################################################################
+  
+  def display_usage
+    page do
+      RI::Options::OptionList.usage(short_form=true)
+    end
+  end
+
+
+  ######################################################################
+  
+  def display_method_info(method)
+    page do
+      @formatter.draw_line(method.full_name)
+      display_params(method)
+      @formatter.draw_line
+      display_flow(method.comment)
+      if method.aliases && !method.aliases.empty?
+        @formatter.blankline
+        aka = "(also known as "
+        aka << method.aliases.map {|a| a.name }.join(", ") 
+        aka << ")"
+        @formatter.wrap(aka)
+      end
+    end
+  end
+  
+  ######################################################################
+  
+  def display_class_info(klass, ri_reader)
+    page do 
+      superclass = klass.superclass_string
+      
+      if superclass
+        superclass = " < " + superclass
+      else
+        superclass = ""
+      end
+      
+      @formatter.draw_line(klass.display_name + ": " +
+                           klass.full_name + superclass)
+      
+      display_flow(klass.comment)
+      @formatter.draw_line 
+    
+      unless klass.includes.empty?
+        @formatter.blankline
+        @formatter.display_heading("Includes:", 2, "")
+        incs = []
+        klass.includes.each do |inc|
+          inc_desc = ri_reader.find_class_by_name(inc.name)
+          if inc_desc
+            str = inc.name + "("
+            str << inc_desc.instance_methods.map{|m| m.name}.join(", ")
+            str << ")"
+            incs << str
+          else
+            incs << inc.name
+          end
+      end
+        @formatter.wrap(incs.sort.join(', '))
+      end
+      
+      unless klass.constants.empty?
+        @formatter.blankline
+        @formatter.display_heading("Constants:", 2, "")
+        len = 0
+        klass.constants.each { |c| len = c.name.length if c.name.length > len }
+        len += 2
+        klass.constants.each do |c|
+          @formatter.wrap(c.value, 
+                          @formatter.indent+((c.name+":").ljust(len)))
+        end 
+      end
+      
+      unless klass.class_methods.empty?
+        @formatter.blankline
+        @formatter.display_heading("Class methods:", 2, "")
+        @formatter.wrap(klass.class_methods.map{|m| m.name}.sort.join(', '))
+      end
+      
+      unless klass.instance_methods.empty?
+        @formatter.blankline
+        @formatter.display_heading("Instance methods:", 2, "")
+        @formatter.wrap(klass.instance_methods.map{|m| m.name}.sort.join(', '))
+      end
+      
+      unless klass.attributes.empty?
+        @formatter.blankline
+        @formatter.wrap("Attributes:", "")
+        @formatter.wrap(klass.attributes.map{|a| a.name}.sort.join(', '))
+      end
+    end
+  end
+  
+  ######################################################################
+  
+  # Display a list of method names
+  
+  def display_method_list(methods)
+    page do
+      puts "More than one method matched your request. You can refine"
+      puts "your search by asking for information on one of:\n\n"
+      @formatter.wrap(methods.map {|m| m.full_name} .join(", "))
+    end
+  end
+  
+  ######################################################################
+  
+  def display_class_list(namespaces)
+    page do
+      puts "More than one class or module matched your request. You can refine"
+      puts "your search by asking for information on one of:\n\n"
+      @formatter.wrap(namespaces.map {|m| m.full_name}.join(", "))
+    end
+  end
+  
+  ######################################################################
+
+  def list_known_classes(classes)
+    if classes.empty?
+      puts "Before using ri, you need to generate documentation"
+      puts "using 'rdoc' with the --ri option"
+    else
+      page do 
+        @formatter.draw_line("Known classes and modules")
+        @formatter.blankline
+        @formatter.wrap(classes.sort.join(", "))
+      end
+    end
+  end
+
+  ######################################################################
+
+  private
+
+  ######################################################################
+
+  def page
+    setup_pager
+    begin
+      yield
+      page_output
+    ensure
+      STDOUT.reopen(@save_stdout) if @save_stdout
+    end
+  end
+
+  ######################################################################
+
+  def setup_pager
+    unless @options.use_stdout
+      require 'tempfile'
+
+      @save_stdout = STDOUT.clone
+      STDOUT.reopen(Tempfile.new("ri_"))
+    end
+  end
+
+  ######################################################################
+
+  def page_output
+    unless @options.use_stdout
+      path = STDOUT.path
+      STDOUT.reopen(@save_stdout)
+      @save_stdout = nil
+      paged = false
+      for pager in [ ENV['PAGER'], "less", "more <", 'pager' ].compact.uniq
+        if system("#{pager} #{path}")
+          paged = true
+          break
+        end
+      end
+      if !paged
+        @options.use_stdout = true
+        puts File.read(path)
+      end
+    end
+  end
+
+  ######################################################################
+  
+  def display_params(method)
+
+    params = method.params
+
+    if params[0,1] == "("
+      if method.is_singleton
+        params = method.full_name + params
+      else
+        params = method.name + params
+      end
+    end
+    params.split(/\n/).each {|p| @formatter.wrap(p) }
+  end
+
+  ######################################################################
+  
+  def display_flow(flow)
+    if !flow || flow.empty?
+      @formatter.wrap("(no description...)")
+    else
+      @formatter.display_flow(flow)
+    end
+  end
+
+
+end  # class RiDisplay
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