From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/lib/irb/input-method.rb | 191 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 191 insertions(+)
 create mode 100644 jni/ruby/lib/irb/input-method.rb

(limited to 'jni/ruby/lib/irb/input-method.rb')

diff --git a/jni/ruby/lib/irb/input-method.rb b/jni/ruby/lib/irb/input-method.rb
new file mode 100644
index 0000000..97add92
--- /dev/null
+++ b/jni/ruby/lib/irb/input-method.rb
@@ -0,0 +1,191 @@
+#
+#   irb/input-method.rb - input methods used irb
+#   	$Release Version: 0.9.6$
+#   	$Revision: 47266 $
+#   	by Keiju ISHITSUKA(keiju@ruby-lang.org)
+#
+# --
+#
+#
+#
+require 'irb/src_encoding'
+require 'irb/magic-file'
+
+module IRB
+  STDIN_FILE_NAME = "(line)" # :nodoc:
+  class InputMethod
+
+    # Creates a new input method object
+    def initialize(file = STDIN_FILE_NAME)
+      @file_name = file
+    end
+    # The file name of this input method, usually given during initialization.
+    attr_reader :file_name
+
+    # The irb prompt associated with this input method
+    attr_accessor :prompt
+
+    # Reads the next line from this input method.
+    #
+    # See IO#gets for more information.
+    def gets
+      IRB.fail NotImplementedError, "gets"
+    end
+    public :gets
+
+    # Whether this input method is still readable when there is no more data to
+    # read.
+    #
+    # See IO#eof for more information.
+    def readable_after_eof?
+      false
+    end
+  end
+
+  class StdioInputMethod < InputMethod
+    # Creates a new input method object
+    def initialize
+      super
+      @line_no = 0
+      @line = []
+      @stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
+      @stdout = IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
+    end
+
+    # Reads the next line from this input method.
+    #
+    # See IO#gets for more information.
+    def gets
+      print @prompt
+      line = @stdin.gets
+      @line[@line_no += 1] = line
+    end
+
+    # Whether the end of this input method has been reached, returns +true+ if
+    # there is no more data to read.
+    #
+    # See IO#eof? for more information.
+    def eof?
+      @stdin.eof?
+    end
+
+    # Whether this input method is still readable when there is no more data to
+    # read.
+    #
+    # See IO#eof for more information.
+    def readable_after_eof?
+      true
+    end
+
+    # Returns the current line number for #io.
+    #
+    # #line counts the number of times #gets is called.
+    #
+    # See IO#lineno for more information.
+    def line(line_no)
+      @line[line_no]
+    end
+
+    # The external encoding for standard input.
+    def encoding
+      @stdin.external_encoding
+    end
+  end
+
+  # Use a File for IO with irb, see InputMethod
+  class FileInputMethod < InputMethod
+    # Creates a new input method object
+    def initialize(file)
+      super
+      @io = IRB::MagicFile.open(file)
+    end
+    # The file name of this input method, usually given during initialization.
+    attr_reader :file_name
+
+    # Whether the end of this input method has been reached, returns +true+ if
+    # there is no more data to read.
+    #
+    # See IO#eof? for more information.
+    def eof?
+      @io.eof?
+    end
+
+    # Reads the next line from this input method.
+    #
+    # See IO#gets for more information.
+    def gets
+      print @prompt
+      l = @io.gets
+      l
+    end
+
+    # The external encoding for standard input.
+    def encoding
+      @io.external_encoding
+    end
+  end
+
+  begin
+    require "readline"
+    class ReadlineInputMethod < InputMethod
+      include Readline
+      # Creates a new input method object using Readline
+      def initialize
+        super
+
+        @line_no = 0
+        @line = []
+        @eof = false
+
+        @stdin = IO.open(STDIN.to_i, :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
+        @stdout = IO.open(STDOUT.to_i, 'w', :external_encoding => IRB.conf[:LC_MESSAGES].encoding, :internal_encoding => "-")
+      end
+
+      # Reads the next line from this input method.
+      #
+      # See IO#gets for more information.
+      def gets
+        Readline.input = @stdin
+        Readline.output = @stdout
+        if l = readline(@prompt, false)
+          HISTORY.push(l) if !l.empty?
+          @line[@line_no += 1] = l + "\n"
+        else
+          @eof = true
+          l
+        end
+      end
+
+      # Whether the end of this input method has been reached, returns +true+
+      # if there is no more data to read.
+      #
+      # See IO#eof? for more information.
+      def eof?
+        @eof
+      end
+
+      # Whether this input method is still readable when there is no more data to
+      # read.
+      #
+      # See IO#eof for more information.
+      def readable_after_eof?
+        true
+      end
+
+      # Returns the current line number for #io.
+      #
+      # #line counts the number of times #gets is called.
+      #
+      # See IO#lineno for more information.
+      def line(line_no)
+        @line[line_no]
+      end
+
+      # The external encoding for standard input.
+      def encoding
+        @stdin.external_encoding
+      end
+    end
+  rescue LoadError
+  end
+end
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