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#!/usr/bin/perl
#***************************************************************************
# EasyView -- Unix File Viewer/Editor Interface
# (a "practical" demo for menu.pl)
#
# Notes: Perl4 - Requires curseperl
# Perl5 - Requires William Setzer's "Curses" extension
#
# Author: Steven L. Kunz
# Networked Applications
# Iowa State University Computation Center
# Ames, IA 50011
# Email: skunz@iastate.edu
#
# Date: February 1997
#****************************************************************************
# Perl5+Curses ONLY!
# Comment these lines for use with Perl4/curseperl
BEGIN { $Curses::OldCurses = 1; }
use Curses; # PerlMenu needs "Curses"
use perlmenu; # Main menu package (Perl5 only)
require "./menuutil.pl"; # For "pause" and "print_nl" routines.
# Perl4/curseperl ONLY!
# Uncomment these lines for use with Perl4/curseperl
# (Did you remember to run "create_menu.pl"?)
#require "./menu.pl"; # Main menu package (Perl4 only)
#require "./menuutil.pl"; # For "pause" and "print_nl" routines.
$SIG{'INT'} = 'cleanup'; # Set signal handler
$| = 1; # Flush after every write to stdout
$last_arrow = 0; # For arrow latching
$last_top = 0; # For arrow latching
#
# MAIN_MENU -- Main (top level) menu
#
while (1) {
&menu_init(1,"EasyView Version 4.0");
&menu_item("Exit","%UP%");
&menu_item("List files in current directory","dir_list");
&menu_item("Page through text files","page_file");
&menu_item("Edit text files","edit_file");
$subr = &menu_display("",$last_arrow,$last_top);
if ($subr eq "%UP%") { &cleanup; }
if ($subr ne "") { &$subr; } # Call subroutine selected
}
#**********
# DIR_LIST -- Provide directory list
#**********
sub dir_list { &dir_select(0,".","Directory Contents"); }
#***********
# PAGE_FILE -- Page through a file in the current directory
#
# Arguments: None
#
# Returns: Nothing
#
# Note: Uses file as an unnumbered menu
#***********
sub page_file {
local($filename,$last_arrow,$last_top);
# Call utility function to select file
$filename = &dir_select(1,".","Select one or more files to page through");
if (($filename eq "%UP%") || ($filename eq "%NONE%")) { return; }
# Split up selections, page through each
split(/[,]/,$filename); # Put return in @_
foreach (@_) { &menu_pager($_); }
}
#**********
# MENU_PAGER -- A simple pager written in menu routines
#**********
sub menu_pager {
local($filename) = @_;
# Load file as an unnumbered menu - let menu_display do the paging
#
# Special thanks: The tab expansion used here was lifted from the
# "pager" program distributed with perl.4.36 in the "usub" directory.
# Don't know who wrote it but it fit the bill. SLK
#
&menu_init(0,"File: $filename");
open(TEMP,$filename);
while (<TEMP>) {
s/^(\t+)/' ' x length($1)/e;
&expand($_) if /\t/;
&menu_item($_,"");
}
&menu_display("",$last_arrow,$last_top);
close(TEMP);
}
# Expand tabs to blanks
sub expand {
while (($off = index($_[0],"\t")) >= 0) {
substr($_[0], $off, 1) = ' ' x (8 - $off % 8);
}
}
#***********
# EDIT_FILE -- Edit a file in the current directory
#***********
sub edit_file {
&clear;
$filename = &dir_select(1,".","Select one or more files to edit");
if (($filename eq "%UP%") || ($filename eq "%NONE%")) { return; }
# Split up selections, edit each
split(/[,]/,$filename); # Put return in @_
foreach (@_) { system("vi $_"); }
}
#************
# DIR_SELECT -- Load a formatted directory list into a menu.
#
# Arguments: Boolean flag indicating numbered menu (1=yes), directory
# name string and top-title string for menu
#
# Returns: File name (or "%UP%" or "%NONE%")
#************
sub dir_select {
local($numbered,$directory,$title) = @_;
local($last_arrow,$last_top) = 0;
opendir(DIR,$directory);
&menu_init($numbered,$title);
dir_entry:
while ($filename = readdir(DIR)) {
next dir_entry if ($filename eq ".");
next dir_entry if ($filename eq "..");
next if (! -f $filename);
($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,
$blksize,$blocks) = stat($filename);
($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) = localtime($mtime);
$mon++;
$sel_action = $filename;
$filename=$filename.substr(" ",0,20-length($filename));
$sel_text = sprintf("%s%s%02d/%02d/%02d %02d:%02d %s\n",
$filename,$filler,$mon,$mday,$year,$hour,$sec,getpwuid($uid));
&menu_item($sel_text,$sel_action);
}
if ($numbered) {
$fn = &menu_display_mult("","");
} else {
$fn = &menu_display("");
}
$fn;
}
#**********
# Cleanup routine (called upon exit)
#**********
sub cleanup {
&clear;
&refresh;
&endwin;
exit;
}
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