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-rw-r--r--ext/curses/view2.rb149
1 files changed, 0 insertions, 149 deletions
diff --git a/ext/curses/view2.rb b/ext/curses/view2.rb
deleted file mode 100644
index 037771a226..0000000000
--- a/ext/curses/view2.rb
+++ /dev/null
@@ -1,149 +0,0 @@
-#!/usr/local/bin/ruby
-
-require "curses"
-
-
-# A curses based file viewer
-class FileViewer
-
- # Create a new fileviewer, and view the file.
- def initialize(filename)
- @data_lines = []
- @screen = nil
- @top = nil
- init_curses
- load_file(filename)
- interact
- end
-
- # Perform the curses setup
- def init_curses
- # signal(SIGINT, finish)
-
- Curses.init_screen
- Curses.nonl
- Curses.cbreak
- Curses.noecho
-
- @screen = Curses.stdscr
-
- @screen.scrollok(true)
- #$screen.keypad(true)
- end
-
- # Load the file into memory, and put
- # the first part on the curses display.
- def load_file(filename)
- fp = open(filename, "r") do |fp|
- # slurp the file
- fp.each_line { |l|
- @data_lines.push(l.chop)
- }
- end
- @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
- rescue
- raise "cannot open file '#{filename}' for reading"
- end
-
-
- # Scroll the display up by one line
- 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
-
- # Scroll the display down by one line
- 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
-
- # Allow the user to interact with the display.
- # This uses EMACS-like keybindings, and also
- # vi-like keybindings as well, except that left
- # and right move to the beginning and end of the
- # file, respectively.
- def interact
- while true
- result = true
- c = Curses.getch
- case c
- when Curses::KEY_DOWN, Curses::KEY_CTRL_N, ?j
- result = scroll_down
- when Curses::KEY_UP, Curses::KEY_CTRL_P, ?k
- 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, ?h
- while( scroll_up )
- end
- when Curses::KEY_RIGHT, Curses::KEY_CTRL_B, ?l
- 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
- end
-end
-
-
-# If we are being run as a main program...
-if __FILE__ == $0
- if ARGV.size != 1 then
- printf("usage: #{$0} file\n");
- exit
- end
-
- viewer = FileViewer.new(ARGV[0])
-end