Adjusting ls output for voluminous output

The previous table output was geared mostly for `ls _pry_`, which isn't
a common of hierarchy. After feedback from users such as @envygeeks, we
found a few tweaks that would help the really-small layers such as those
found in Rails or in small classes, namely:

- Rolling it up onto one line, if possible
- Highlighting the heading in the colors familiar to users of GNU ls for
  "directory" style

Additionally, I took the opportunity for toning down the
private/protected method colors, because before they were green and
yellow, now they're both "muted terminal blue"

Without the ability to really get in and really distinguish colors (e.g.
using 256 colors), giving "protected" such a loud color seems wrong.

Before recoloring:
  https://github.com/pry/pry/issues/813#issuecomment-12355179
After:
  https://github.com/pry/pry/issues/813#issuecomment-12355941

lib/pry/commands/ls.rb

@@ -325,8 +325,8 @@ class Pry
     # Add a new section to the output. Outputs nothing if the section would be empty.
     def output_section(heading, body)
       return "" if body.compact.empty?
-      table = Pry::Helpers.tablify_to_screen_width(body)
-      "#{text.bold(color(:heading, heading))}: \n#{table}\n"
+      fancy_heading = text.bold(color(:heading, heading))
+      Pry::Helpers.tablify_or_one_line(fancy_heading, body)
     end
 
     # Color output based on config.ls.*_color

lib/pry/helpers/table.rb

@@ -1,14 +1,23 @@
 class Pry
   module Helpers
-    def self.tablify_to_screen_width(things)
-      things = things.compact
-
-      if TerminalInfo.screen_size.nil?
-        return things.join(Pry.config.ls.separator)
+    def self.tablify_or_one_line(heading, things)
+      plain_heading = Pry::Helpers::Text.strip_color(heading)
+      attempt = Table.new(things, :column_count => things.size)
+      if attempt.fits_on_line?(TerminalInfo.width! - plain_heading.size - 2)
+        "#{heading}: #{attempt}\n"
+      else
+        "#{heading}: \n#{tablify_to_screen_width(things, :indent => '  ')}\n"
       end
+    end
 
-      screen_width = (TerminalInfo.screen_size || [25, 80])[1]
-      tablify(things, screen_width)
+    def self.tablify_to_screen_width(things, options = {})
+      things = things.compact
+      if indent = options[:indent]
+        usable_width = TerminalInfo.width! - indent.size
+        tablify(things, usable_width).to_s.gsub(/^/, indent)
+      else
+        tablify(things, TerminalInfo.width!).to_s
+      end
     end
 
     def self.tablify(things, line_length)

lib/pry/pry_class.rb

@@ -323,11 +323,11 @@ class Pry
     config.extra_sticky_locals = {}
 
     config.ls ||= OpenStruct.new({
-      :heading_color            => :default,
+      :heading_color            => :bright_blue,
 
       :public_method_color      => :default,
-      :private_method_color     => :green,
-      :protected_method_color   => :yellow,
+      :private_method_color     => :blue,
+      :protected_method_color   => :blue,
       :method_missing_color     => :bright_red,
 
       :local_var_color          => :yellow,

lib/pry/terminal_info.rb

@@ -11,6 +11,11 @@ class Pry::TerminalInfo
     end
   end
 
+  # Return a screen width or a default if it fails.
+  def self.width! default = 80
+    (screen_size || [nil, default])[1]
+  end
+
   def self.actual_screen_size
     [
       # Some readlines also provides get_screen_size.

spec/commands/ls_spec.rb

@@ -37,7 +37,7 @@ describe "ls" do
   describe "methods" do
     it "should show public methods by default" do
       output = pry_eval("ls Class.new{ def goo; end; public :goo }.new")
-      output.should =~ /methods: \ngoo/
+      output.should =~ /methods: goo/
     end
 
     it "should not show protected/private by default" do
@@ -46,12 +46,12 @@ describe "ls" do
     end
 
     it "should show public methods with -p" do
-      pry_eval("ls -p Class.new{ def goo; end }.new").should =~ /methods: \ngoo/
+      pry_eval("ls -p Class.new{ def goo; end }.new").should =~ /methods: goo/
     end
 
     it "should show protected/private methods with -p" do
-      pry_eval("ls -pM Class.new{ def goo; end; protected :goo }").should =~ /methods: \ngoo/
-      pry_eval("ls -p Class.new{ def goo; end; private :goo }.new").should =~ /methods: \ngoo/
+      pry_eval("ls -pM Class.new{ def goo; end; protected :goo }").should =~ /methods: goo/
+      pry_eval("ls -p Class.new{ def goo; end; private :goo }.new").should =~ /methods: goo/
     end
 
     it "should work for objects with an overridden method method" do

spec/helpers/table_spec.rb

@@ -80,4 +80,7 @@ asfadsssaaad    fasfaafdssd     s
     end
   end
 
+  describe 'decide between one-line or indented output' do
+    Pry::Helpers.tablify_or_one_line('head', %w(ing)).should == 'head:  ing'
+  end
 end