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#!/usr/bin/perl -w
#
# Convert a single gnuplot demo script to a web page
# Usage:
# webify xxx
#
# Reads xxx.dem and creates xxx.html along with associated
# png images output to xxx.<n>.png
#
# If gpsavediff is present also create a set of scripts
# xxx.<n>.gnu corresponding to the minimal set of commands
# needed to generate that png image.
#
# If gnuplot_demo.css is present, link to it as a stylesheet.
#
# Ethan A Merritt <merritt@u.washington.edu>
# December 2003
#
# EAM Jan 2004
# use gpsavediff if available
# link to gnuplot_demo.css if available
#
# EAM Aug 2005
# If DEMOTERM is present as an environmental variable, then use
# set term DEMOTERM
# rather than the default terminal settings
# setenv DEMOTERM "pngcairo font 'arial,10' transparent size 600,400"
# ./webify.pl image
#
# EAM Apr 2009
# new layout for generated web pages
#
use Env qw(DEMOTERM GNUPLOT_LIB);
use Time::localtime;
use HTML::Entities;
# Use the in-tree copy of gnuplot if there is one
my $gnuplot = ( -x "../../src/gnuplot" ) ? "../../src/gnuplot" : "gnuplot" ;
if ((!defined $ENV{GNUPLOT_LIB}) || $GNUPLOT_LIB eq "") {
$GNUPLOT_LIB = "..";
}
my $date = ctime();
my $plot = 1;
# input and output files
open(IN, "<$GNUPLOT_LIB/$ARGV[0].dem") or die "can't open $GNUPLOT_LIB/$ARGV[0].dem";
open(OUT, ">$ARGV[0].html") or die "can't open $ARGV[0].html";
binmode IN, ":encoding(UTF-8)";
binmode OUT,":encoding(UTF-8)";
# open pipe to gnuplot and set terminal type
open(GNUPLOT, "|$gnuplot") or die "can't find gnuplot";
binmode GNUPLOT,":encoding(UTF-8)";
if ((defined $ENV{DEMOTERM}) && $DEMOTERM ne "") {
print GNUPLOT "set term $DEMOTERM\n";
} else {
print GNUPLOT "set term pngcairo font 'arial,10' transparent size 600,400\n";
}
print GNUPLOT "set output \"$ARGV[0].$plot.png\"\n";
# suppress animations
print GNUPLOT "NO_ANIMATION = 1\n";
# find out if gpsavediff is available in current path
my $savescripts = T;
{local $^W=0; $savescripts = open(FOO, "|gpsavediff") }
close FOO if ($savescripts);
# Boiler plate header
print OUT "<html>\n<head>\n<title>gnuplot demo script: $ARGV[0].dem </title>\n";
print OUT "<meta charset=\"UTF-8\" />\n";
print OUT "<link rel=\"stylesheet\" href=\"gnuplot_demo.css\" type=\"text/css\">\n"
if (-e "gnuplot_demo.css");
print OUT "</head>\n";
print OUT "<body>\n";
print OUT "<a href=index.html><image src=return.png alt=\"Back to demo index\" class=\"icon-image\"></a>\n";
print OUT "<h2>gnuplot demo script: <font color=blue>$ARGV[0].dem</font> </h2>\n";
print OUT "<i>autogenerated by webify.pl on $date</i>";
# try to find gnuplot version
$version = `$gnuplot --version`;
print OUT "\n<br><i>gnuplot version $version</i>";
print OUT "<hr>\n";
# Start processing
print OUT "<table><tr><td class='LIMG'>";
print OUT "<img src=\"$ARGV[0].$plot.png\" alt=\"\">\n";
print OUT "</td><td>";
print OUT "<pre>\n";
while (<IN>) {
if (/^ *pause -1/) {
if ($savescripts) {
print OUT "<br><p>Click <a href=$ARGV[0].$plot.gnu>here</a> ",
"for minimal script to generate this plot</p>\n";
print GNUPLOT "save \"| gpsavediff > $ARGV[0].$plot.gnu\"\n";
}
print OUT "</pre></td></tr></table>\n<br clear=all>\n<hr>\n";
$plot++;
print OUT "<table><tr><td class='LIMG'>";
print OUT "<img src=\"$ARGV[0].$plot.png\" alt=\"\">\n";
print OUT "</td><td>\n";
print OUT "<pre>\n";
print GNUPLOT "set output \"$ARGV[0].$plot.png\"\n";
} elsif (/^pause/) {
print GNUPLOT "set output \"$ARGV[0].$plot.png\"\n";
} elsif (/^ *reset/) {
print GNUPLOT;
} else {
print OUT HTML::Entities::encode($_);
print GNUPLOT;
}
}
# Amazingly enough, that's it.
# Unlink leftover empty plot before leaving.
close GNUPLOT;
unlink("$ARGV[0].$plot.png");
print OUT "</pre></td></tr></table>\n";
print OUT "</body>\n</html>\n";
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