From 1e760c0be3ed35874204114e7454509f740c0fe2 Mon Sep 17 00:00:00 2001
From: shyouhei <shyouhei@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 22 Aug 2007 01:53:51 +0000
Subject: add tag v1_8_6_71

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_8_5_71@13189 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ruby_1_8_6/ext/curses/view2.rb | 115 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 ruby_1_8_6/ext/curses/view2.rb

(limited to 'ruby_1_8_6/ext/curses/view2.rb')

diff --git a/ruby_1_8_6/ext/curses/view2.rb b/ruby_1_8_6/ext/curses/view2.rb
new file mode 100644
index 0000000000..18d9619216
--- /dev/null
+++ b/ruby_1_8_6/ext/curses/view2.rb
@@ -0,0 +1,115 @@
+#!/usr/local/bin/ruby
+
+require "curses"
+
+if ARGV.size != 1 then
+  printf("usage: view file\n");
+  exit
+end
+begin
+  fp = open(ARGV[0], "r")
+rescue
+  raise "cannot open file: #{ARGV[1]}"
+end
+
+# signal(SIGINT, finish)
+
+Curses.init_screen
+Curses.nonl
+Curses.cbreak
+Curses.noecho
+
+$screen = Curses.stdscr
+
+$screen.scrollok(true)
+#$screen.keypad(true)
+
+# slurp the file
+$data_lines = []
+fp.each_line { |l|
+  $data_lines.push(l.chop)
+}
+fp.close
+
+$top = 0
+$data_lines[0..$screen.maxy-1].each_with_index{|line, idx|
+  $screen.setpos(idx, 0)
+  $screen.addstr(line)
+}
+$screen.setpos(0,0)
+$screen.refresh
+
+def scroll_up
+  if( $top > 0 )
+    $screen.scrl(-1)
+    $top -= 1
+    str = $data_lines[$top]
+    if( str )
+      $screen.setpos(0, 0)
+      $screen.addstr(str)
+    end
+    return true
+  else
+    return false
+  end
+end
+
+def scroll_down
+  if( $top + $screen.maxy < $data_lines.length )
+    $screen.scrl(1)
+    $top += 1
+    str = $data_lines[$top + $screen.maxy - 1]
+    if( str )
+      $screen.setpos($screen.maxy - 1, 0)
+      $screen.addstr(str)
+    end
+    return true
+  else
+    return false
+  end
+end
+
+while true
+  result = true
+  c = Curses.getch
+  case c
+  when Curses::KEY_DOWN, Curses::KEY_CTRL_N
+    result = scroll_down
+  when Curses::KEY_UP, Curses::KEY_CTRL_P
+    result = scroll_up
+  when Curses::KEY_NPAGE, ?\s  # white space
+    for i in 0..($screen.maxy - 2)
+      if( ! scroll_down )
+	if( i == 0 )
+	  result = false
+	end
+	break
+      end
+    end
+  when Curses::KEY_PPAGE
+    for i in 0..($screen.maxy - 2)
+      if( ! scroll_up )
+	if( i == 0 )
+	  result = false
+	end
+	break
+      end
+    end
+  when Curses::KEY_LEFT, Curses::KEY_CTRL_T
+    while( scroll_up )
+    end
+  when Curses::KEY_RIGHT, Curses::KEY_CTRL_B
+    while( scroll_down )
+    end
+  when ?q
+    break
+  else
+    $screen.setpos(0,0)
+    $screen.addstr("[unknown key `#{Curses.keyname(c)}'=#{c}] ")
+  end
+  if( !result )
+    Curses.beep
+  end
+  $screen.setpos(0,0)
+end
+Curses.close_screen
-- 
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