add dvips perl parsing code

git-svn-id: svn://tug.org/texlive/trunk@11493 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 159 insertions, 15 deletions

diff --git a/Master/tlpkg/etc/test-code-for-papersize-in-perl.pl b/Master/tlpkg/etc/test-code-for-papersize-in-perl.pl
index c563c45da0a..f91cdd4630e 100644
--- a/Master/tlpkg/etc/test-code-for-papersize-in-perl.pl
+++ b/Master/tlpkg/etc/test-code-for-papersize-in-perl.pl
@@ -10,8 +10,11 @@ my %pdftex_papersize = (
 
 my %xdvi_papersize;
 $xdvi_papersize{'us'}='8.5x11';
+$xdvi_papersize{'letter'}='8.5x11';
 $xdvi_papersize{'usr'}='11x8.5';
 $xdvi_papersize{'legal'}='8.5x14';
+$xdvi_papersize{'ledger'}='17.0x11.0';
+$xdvi_papersize{'tabloid'}= '11.0x17.0';
 $xdvi_papersize{'foolscap'}='13.5x17.0';
 $xdvi_papersize{'a1'}='59.4x84.0cm';
 $xdvi_papersize{'a2'}='42.0x59.4cm';
@@ -75,19 +78,56 @@ if (!$what) {
   exit 1;
 }
 
+# all subs do_* work the same way
+# do_foobar --list
+#    list all available sizes with the selected first
+# do_foobar
+#    informational string which paper has been selected
+# doo_foobar <paper>
+#    selects the given <paper>
+
 if ($what eq "dvips") {
-  do_dvips();
+  do_dvips(@ARGV);
 } elsif ($what eq "dvipdfm") {
-  do_dvipdfm();
+  do_dvipdfm(@ARGV);
 } elsif ($what eq "xdvi") {
-  do_xdvi();
+  do_xdvi(@ARGV);
 } else {
   print "Unknown what $what!\n";
   exit 1;
 }
 exit 0;
 
+#
+# dvips config.ps format:
+# /--- config.ps ---
+# |...
+# |stuff not related to paper sizes
+# |...
+# | <empty line>
+# |% some comments
+# |% more comments
+# |@ <NAME> <WIDTH> <HEIGHT>
+# |@+ ...definition line
+# |@+ ...definition line
+# |... more definition lines
+# |@+ %%EndPaperSize
+# |
+# |@ <NAME> <WIDTH> <HEIGHT>
+# |...
+# \------------
+#
+# the first paper definition is the default
+# selecting paper is done like with texconfig which used ed to move the
+# selected part between @ $selected_paper .... @ /-1 (the line before the
+# next @ line) to the line before the first @  line.
+# (what a tricky ed invocation te created there, impressive!!!)
+#
+# Reading is done via --progname=dvips --format='dvips config' config.ps
+# Writing is done to TEXMFSYSCONFIG/dvips/config/config.ps
+#
 sub do_dvips {
+  my $newpaper = shift;
   my $configps = `kpsewhich --progname=dvips --format='dvips config' config.ps`;
   chomp($configps);
   print "file used: $configps\n";
@@ -96,14 +136,90 @@ sub do_dvips {
   my @lines = <FOO>;
   close(FOO);
 
-  my @papersizes = map { +s/^@ (\w+) .*$/$1/; $_; }  grep (m/^@ /, @lines);
+  my @papersizes;
+  my $firstpaperidx;
+  my %startidx;
+  my %endidx;
+  my $in_block = "";
+  my $idx = 0;
+  for my $idx (0 .. $#lines) {
+    if ($lines[$idx] =~ m/^@ (\w+)/) {
+      $startidx{$1} = $idx;
+      $firstpaperidx || ($firstpaperidx = $idx-1);
+      $in_block = $1;
+      push @papersizes, $1;
+      next;
+    }
+    # empty lines or comments stop a block
+    if ($in_block) {
+      if ($lines[$idx] =~ m/^\s*(%.*)?\s*$/) {
+        $endidx{$in_block} = $idx-1;
+        $in_block = "";
+      }
+      next;
+    }
+  }
 
-  chomp(@papersizes);
+  #for my $p (@papersizes) {
+  #  print "papersize $p from idx $startidx{$p} to $endidx{$p}\n";
+  #}
 
-  for (@papersizes) { print "...$_...\n"; }
+  if (defined($newpaper)) {
+    if ($newpaper eq "--list") {
+      for my $p (@papersizes) {
+        print "$p\n"; # first is already the selected one
+      }
+    } else {
+      my $found = 0;
+      for my $p (@papersizes) {
+        if ($p eq $newpaper) {
+          $found = 1;
+          last;
+        }
+      }
+      if ($found) {
+        my @newlines;
+        for my $idx (0..$#lines) {
+          if ($idx < $firstpaperidx) {
+            push @newlines, $lines[$idx];
+            next;
+          }
+          if ($idx == $firstpaperidx) { 
+            # insert the selected paper definition
+            push @newlines, @lines[$startidx{$newpaper}..$endidx{$newpaper}];
+            push @newlines, $lines[$idx];
+            next;
+          }
+          if ($idx >= $startidx{$newpaper} && $idx <= $endidx{$newpaper}) {
+            next;
+          }
+          push @newlines, $lines[$idx];
+        }
+        # output should go to $texmfsysconfig/dvips/config/config.ps TODO TODO
+        for (@newlines) { print; }
+      } else {
+        warn "Not a valid paper size for dvips: $newpaper\n";
+      }
+    }
+  } else {
+    # just print the current value
+    print "current dvips paper size: $papersizes[0]\n";
+  }
 }
 
+#
+# xdvi format:
+# /--- XDvi ---
+# |...
+# |*paper: <NAME>
+# |...
+# \------------
+#
+# Reading is done via --progname=xdvi --format='other text files' XDvi
+# Writing is done to TEXMFSYSCONFIG/xdvi/XDvi
+#
 sub do_xdvi {
+  my $newpaper = shift;
   my $xdvi = `kpsewhich --progname=xdvi --format='other text files' XDvi`;
   chomp($xdvi);
   print "file used: $xdvi\n";
@@ -112,17 +228,45 @@ sub do_xdvi {
   my @lines = <FOO>;
   close(FOO);
 
-  my @hit = map { +s/^\*paper:\s+(\w+)\s*$/$1/; $_; } grep (m/^\*paper: /,@lines);
-  my $hit;
-  if (!@hit) {
-    print "paper config not found\n";
+  my $currentpaper;
+  my @paperlines = grep (m/^\*paper: /,@lines);
+  if (!@paperlines) {
+    $currentpaper = "(undefined)";
   } else {
-    if ($#hit > 0) {
-      print "Strange, more than one paper definiton, using the first one!\n";
+    if ($#paperlines > 0) {
+      warn "Strange, more than one paper definiton, using the first one!\n";
     }
-    $hit = $hit[0];
-    chomp($hit);
-    print "current xdvi paper size: $hit\n";
+    $currentpaper = $paperlines[0];
+    chomp($currentpaper);
+    $currentpaper =~ s/^\*paper:\s+(\w+)\s*$/$1/;
+  }
+
+  # change value
+  if (defined($newpaper)) {
+    if ($newpaper eq "--list") {
+      print "$currentpaper\n";
+      for my $p (keys %xdvi_papersize) {
+        print "$p\n" unless ($p eq $currentpaper);
+      }
+    } else {
+      my $found = 0;
+      for my $p (keys %xdvi_papersize) {
+        if ($p eq $newpaper) {
+          $found = 1;
+          last;
+        }
+      }
+      if ($found) {
+        map { +s/^\*paper:\s+(\w+)\s*$/\*paper: $newpaper\n/; } @lines;
+        # output should go to $texmfsysconfig/xdvi/XDvi TODO TODO
+        for (@lines) { print; }
+      } else {
+        warn "Not a valid paper size for xdvi: $newpaper\n";
+      }
+    }
+  } else {
+    # just print the current value
+    print "current xdvi paper size: $currentpaper\n";
   }
 }