#!/usr/bin/perl -w
-# Copyright © 2005 Jamie Zawinski <jwz@jwz.org>
+# Copyright © 2005-2010 Jamie Zawinski <jwz@jwz.org>
#
# Permission to use, copy, modify, distribute, and sell this software and its
# documentation for any purpose is hereby granted without fee, provided that
# .xscreensaver file. It may load a file, a URL, run a program, or just
# print the date.
#
+# In a native MacOS build of xscreensaver, this script is included in
+# the Contents/Resources/ directory of each screen saver .bundle that
+# uses it; and in that case, it looks up its resources using
+# /usr/bin/defaults instead.
+#
# Created: 19-Mar-2005.
require 5;
-use diagnostics;
+#use diagnostics; # Fails on some MacOS 10.5 systems
use strict;
+
use Socket;
use POSIX qw(strftime);
use Text::Wrap qw(wrap);
use bytes;
my $progname = $0; $progname =~ s@.*/@@g;
-my $version = q{ $Revision: 1.7 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/;
+my $version = q{ $Revision: 1.22 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/;
my $verbose = 0;
my $http_proxy = undef;
my $text_url = '';
my $wrap_columns = undef;
+my $nyarlathotep_p = 0;
# Maps HTML character entities to the corresponding Latin1 characters.
"ocirc" => 'ô', "otilde" => 'õ', "ouml" => 'ö', "divide" => '÷',
"oslash" => 'ø', "ugrave" => 'ù', "uacute" => 'ú', "ucirc" => 'û',
"uuml" => 'ü', "yacute" => 'ý', "thorn" => 'þ', "yuml" => 'ÿ',
- "apos" => '\''
+ "apos" => '\'',
+
+ # HTML 4 entities that do not have 1:1 Latin1 mappings.
+ "bull" => "*", "hellip"=> "...", "prime" => "'", "Prime" => "\"",
+ "frasl" => "/", "trade" => "[tm]", "larr" => "<-", "rarr" => "->",
+ "harr" => "<->", "lArr" => "<=", "rArr" => "=>", "hArr" => "<=>",
+ "empty" => "Ø", "minus" => "-", "lowast"=> "*", "sim" => "~",
+ "cong" => "=~", "asymp" => "~", "ne" => "!=", "equiv" => "==",
+ "le" => "<=", "ge" => ">=", "lang" => "<", "rang" => ">",
+ "loz" => "<>", "OElig" => "OE", "oelig" => "oe", "Yuml" => "Y",
+ "circ" => "^", "tilde" => "~", "ensp" => " ", "emsp" => " ",
+ "thinsp"=> " ", "ndash" => "-", "mdash" => "-", "lsquo" => "`",
+ "rsquo" => "'", "sbquo" => "'", "ldquo" => "\"", "rdquo" => "\"",
+ "bdquo" => "\"", "lsaquo"=> "<", "rsaquo"=> ">",
);
# Maps certain UTF8 characters (2 or 3 bytes) to the corresponding
my ($text) = @_;
$text =~ s/(&(\#)?([[:alpha:]\d]+);?)/
{
- my $c;
- if ($2) {
- $c = chr($3); # the &#number is always decimal, right?
+ my $c = $3;
+ if (! defined($2)) {
+ $c = $entity_table{$c}; # for Á
} else {
- $c = $entity_table{$3};
+ if ($c =~ m@^x([\dA-F]+)$@si) { # for A
+ $c = chr(hex($1));
+ } elsif ($c =~ m@^\d+$@si) { # for A
+ $c = chr($c);
+ } else {
+ $c = undef;
+ }
}
-# print STDERR "$progname: warning: unknown HTML character entity \"$1\"\n"
-# unless $c;
- ($c ? $c : "[$3]");
+ ($c || "[$3]"); # for &unknown; => "[unknown]"
}
/gexi;
return $text;
# Reads the prefs we use from ~/.xscreensaver
#
-sub get_prefs() {
-
+sub get_x11_prefs() {
my $got_any_p = 0;
local *IN;
my $body = '';
while (<IN>) { $body .= $_; }
close IN;
- $got_any_p = get_prefs_1 ($body);
+ $got_any_p = get_x11_prefs_1 ($body);
} elsif ($verbose > 1) {
print STDERR "$progname: $config_file: $!\n";
}
- if (! $got_any_p) {
+ if (! $got_any_p && defined ($ENV{DISPLAY})) {
# We weren't able to read settings from the .xscreensaver file.
# Fall back to any settings in the X resource database
# (/usr/X11R6/lib/X11/app-defaults/XScreenSaver)
#
print STDERR "$progname: reading X resources\n" if ($verbose > 1);
my $body = `appres XScreenSaver xscreensaver -1`;
- $got_any_p = get_prefs_1 ($body);
+ $got_any_p = get_x11_prefs_1 ($body);
}
if ($verbose > 1) {
}
-sub get_prefs_1($) {
+sub get_x11_prefs_1($) {
my ($body) = @_;
my $got_any_p = 0;
}
+sub get_cocoa_prefs($) {
+ my ($id) = @_;
+ my $v;
+
+ print STDERR "$progname: reading Cocoa prefs: \"$id\"\n" if ($verbose > 1);
+
+ $v = get_cocoa_pref_1 ($id, "textMode");
+ $text_mode = $v if defined ($v);
+
+ # The "textMode" pref is set to a number instead of a string because I
+ # can't figure out the black magic to make Cocoa bindings work right.
+ #
+ if ($text_mode eq '0') { $text_mode = 'date'; }
+ elsif ($text_mode eq '1') { $text_mode = 'literal'; }
+ elsif ($text_mode eq '2') { $text_mode = 'file'; }
+ elsif ($text_mode eq '3') { $text_mode = 'url'; }
+
+ $v = get_cocoa_pref_1 ($id, "textLiteral");
+ $text_literal = $v if defined ($v);
+
+ $v = get_cocoa_pref_1 ($id, "textFile");
+ $text_file = $v if defined ($v);
+
+ $v = get_cocoa_pref_1 ($id, "textProgram");
+ $text_program = $v if defined ($v);
+
+ $v = get_cocoa_pref_1 ($id, "textURL");
+ $text_url = $v if defined ($v);
+}
+
+
+sub get_cocoa_pref_1($$) {
+ my ($id, $key) = @_;
+ # make sure there's nothing stupid/malicious in either string.
+ $id =~ s/[^-a-z\d. ]/_/gsi;
+ $key =~ s/[^-a-z\d. ]/_/gsi;
+ my $cmd = "defaults -currentHost read \"$id\" \"$key\"";
+
+ print STDERR "$progname: executing $cmd\n"
+ if ($verbose > 3);
+
+ my $val = `$cmd 2>/dev/null`;
+ $val =~ s/^\s+//s;
+ $val =~ s/\s+$//s;
+
+ print STDERR "$progname: Cocoa: $id $key = \"$val\"\n"
+ if ($verbose > 2);
+
+ $val = undef if ($val =~ m/^$/s);
+
+ return $val;
+}
+
+
# like system() but checks errors.
#
sub safe_system(@) {
if ($text_mode eq 'literal') {
$text_literal = strftime ($text_literal, localtime);
+ $text_literal =~ y/A-Za-z/N-ZA-Mn-za-m/ if ($nyarlathotep_p);
print STDOUT $text_literal;
print STDOUT "\n" unless ($text_literal =~ m/\n$/s);
} elsif ($text_mode eq 'file') {
+ $text_file =~ s@^~/@$ENV{HOME}/@s; # allow literal "~/"
+
local *IN;
if (open (IN, "<$text_file")) {
print STDERR "$progname: reading $text_file\n" if ($verbose);
reformat_text ($body);
} else {
# stream it
- while (<IN>) { print $_; }
+ while (<IN>) {
+ y/A-Za-z/N-ZA-Mn-za-m/ if ($nyarlathotep_p);
+ print $_;
+ }
}
close IN;
} else {
} else { # $text_mode eq 'date'
safe_system ("uname", "-n");
- if (-f "/etc/redhat-release") { system ("cat", "/etc/redhat-release"); }
- safe_system ("uname", "-sr");
+
+ my $unamep = 1;
+
+ if (-f "/etc/redhat-release") { # "Fedora Core release 4 (Stentz)"
+ system ("cat", "/etc/redhat-release");
+ }
+
+ if (-f "/etc/release") { # "Solaris 10 3/05 s10_74L2a X86"
+ safe_system ("head", "-1", "/etc/release");
+ }
+
+ if (-f "/usr/sbin/system_profiler") { # "Mac OS X 10.4.5 (8H14)"
+ my $sp = # "iMac G5"
+ `/usr/sbin/system_profiler SPSoftwareDataType SPHardwareDataType`;
+ my ($v) = ($sp =~ m/^\s*System Version:\s*(.*)$/mi);
+ my ($s) = ($sp =~ m/^\s*CPU Speed:\s*(.*)$/mi);
+ my ($t) = ($sp =~ m/^\s*Machine Name:\s*(.*)$/mi);
+ print "$v\n" if ($v);
+ print "$s $t\n" if ($s && $t);
+ $unamep = !defined ($v);
+ }
+
+ if ($unamep) {
+ safe_system ("uname", "-sr"); # "Linux 2.6.15-1.1831_FC4"
+ }
+
print "\n";
safe_system ("date", "+%c");
print "\n";
sub get_url_1($;$) {
my ($url, $referer) = @_;
+ $url =~ s@^feed:@http:@si;
if (! ($url =~ m@^http://@i)) {
error ("not an HTTP URL: $url");
}
my ($body, $rss_p) = @_;
$_ = $body;
+ # In HTML, try to preserve newlines inside of PRE.
+ #
if (! $rss_p) {
- # In HTML, unfold lines (this breaks PRE. Sue me.)
+ s@(<PRE\b[^<>]*>\s*)(.*?)(</PRE)@{
+ my ($a, $b, $c) = ($1, $2, $3);
+ $b =~ s/[\r\n]/<BR>/gs;
+ $a . $b . $c;
+ }@gsexi;
+ }
+
+ if (! $rss_p) {
+ # In HTML, unfold lines.
# In RSS, assume \n means literal line break.
s@[\r\n]@ @gsi;
}
s/[ \t]+$//gm; # lose whitespace at end of line again
}
+ s/^\n+//gs;
+
+ y/A-Za-z/N-ZA-Mn-za-m/ if ($nyarlathotep_p);
print STDOUT $_;
}
$title = rss_field_to_html ($title || '');
$body1 = rss_field_to_html ($body1 || '');
+ $title = '' if ($body1 eq $title); # Identical in Twitter's atom feed.
+
reformat_html ("$title<P>$body1", 1);
print "\n";
}
$body =~ s/[ \t]+$//gm;
}
+ $body =~ y/A-Za-z/N-ZA-Mn-za-m/ if ($nyarlathotep_p);
print STDOUT $body;
}
-sub get_url_text($) {
- my ($url) = @_;
+# Figure out what the proxy server should be, either from environment
+# variables or by parsing the output of the (MacOS) program "scutil",
+# which tells us what the system-wide proxy settings are.
+#
+sub set_proxy() {
# historical suckage: the environment variable name is lower case.
$http_proxy = $ENV{http_proxy} || $ENV{HTTP_PROXY};
- if ($http_proxy && $http_proxy =~ m@^http://([^/]*)/?$@ ) {
- # historical suckage: allow "http://host:port" as well as "host:port".
- $http_proxy = $1;
+ if (defined ($http_proxy)) {
+ if ($http_proxy && $http_proxy =~ m@^http://([^/]*)/?$@ ) {
+ # historical suckage: allow "http://host:port" as well as "host:port".
+ $http_proxy = $1;
+ }
+
+ } else {
+ my $proxy_data = `scutil --proxy 2>/dev/null`;
+ my ($server) = ($proxy_data =~ m/\bHTTPProxy\s*:\s*([^\s]+)/s);
+ my ($port) = ($proxy_data =~ m/\bHTTPPort\s*:\s*([^\s]+)/s);
+ # Note: this ignores the "ExceptionsList".
+ if ($server) {
+ $http_proxy = $server;
+ $http_proxy .= ":$port" if $port;
+ }
}
+ print STDERR "$progname: proxy server: $http_proxy\n"
+ if ($verbose > 2 && $http_proxy);
+}
+
+
+sub get_url_text($) {
+ my ($url) = @_;
+
+ set_proxy();
+
my ($ct, $body) = get_url ($url);
$ct = guess_content_type ($ct, $body);
sub main() {
my $load_p = 1;
+ my $cocoa_id = undef;
while ($#ARGV >= 0) {
$_ = shift @ARGV;
elsif (m/^--?date$/) { $text_mode = 'date';
$load_p = 0; }
elsif (m/^--?text$/) { $text_mode = 'literal';
- $text_literal = shift @ARGV;
+ $text_literal = shift @ARGV || '';
$load_p = 0; }
elsif (m/^--?file$/) { $text_mode = 'file';
- $text_file = shift @ARGV;
+ $text_file = shift @ARGV || '';
$load_p = 0; }
elsif (m/^--?program$/) { $text_mode = 'program';
- $text_program = shift @ARGV;
+ $text_program = shift @ARGV || '';
$load_p = 0; }
elsif (m/^--?url$/) { $text_mode = 'url';
- $text_url = shift @ARGV;
+ $text_url = shift @ARGV || '';
$load_p = 0; }
elsif (m/^--?col(umn)?s?$/) { $wrap_columns = 0 + shift @ARGV; }
+ elsif (m/^--?cocoa$/) { $cocoa_id = shift @ARGV; }
+ elsif (m/^--?nyarlathotep$/) { $nyarlathotep_p++; }
elsif (m/^-./) { usage; }
else { usage; }
}
- get_prefs() if ($load_p);
+ if ($load_p) {
+
+ if (!defined ($cocoa_id)) {
+ # see OSX/XScreenSaverView.m
+ $cocoa_id = $ENV{XSCREENSAVER_CLASSPATH};
+ }
+
+ if (defined ($cocoa_id)) {
+ get_cocoa_prefs($cocoa_id);
+ } else {
+ get_x11_prefs();
+ }
+ }
+
output();
+
+
+ if (defined ($cocoa_id)) {
+ #
+ # On MacOS, sleep for 10 seconds between when the last output is
+ # printed, and when this process exits. This is because MacOS
+ # 10.5.0 and later broke ptys in a new and exciting way: basically,
+ # once the process at the end of the pty exits, you have exactly
+ # 1 second to read all the queued data off the pipe before it is
+ # summarily flushed.
+ #
+ # Many of the screen savers were written to depend on being able
+ # to read a small number of bytes, and continue reading until they
+ # reached EOF. This is no longer possible.
+ #
+ # Note that the current MacOS behavior has all three of these
+ # awesome properties: 1) Inconvenient; 2) Has no sane workaround;
+ # 3) Different behavior than MacOS 10.1 through 10.4; and 4)
+ # Different behavior than every other Unix in the world.
+ #
+ # See http://jwz.livejournal.com/817438.html, and for those of
+ # you inside Apple, "Problem ID 5606018".
+ #
+ # One workaround would be to rewrite the savers to have an
+ # internal buffer, and always read as much data as possible as
+ # soon as a pipe has input available. However, that's a lot more
+ # work, so instead, let's just not exit right away, and hope that
+ # 10 seconds is enough.
+ #
+ # This will solve the problem for invocations of xscreensaver-text
+ # that produce little output (e.g., date-mode); and won't solve it
+ # in cases where a large amount of text is generated in a short
+ # amount of time (e.g., url-mode.)
+ #
+ sleep (10);
+ }
}
main();
projects / xscreensaver / blobdiff