version 1.99, 2006/06/06 11:04:18
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version 1.100, 2006/06/12 11:21:07
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Line 668 sub busy_wait_command {
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Line 668 sub busy_wait_command {
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# the maximum number of pages. |
# the maximum number of pages. |
# |
# |
sub repaginate_postscript { |
sub repaginate_postscript { |
# For now just strip out the STARTOFSTUDENTSTAMP |
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# ENDOFSTUDENTSTAMP markers in the postscript. |
# We will try to do this in 2 passes through the postscript since |
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# the postscript is potentially large, to do 2 passes, the first pass |
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# must be able to calculate the total number of document pages so that |
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# at the beginning of the second pass we already know how to replace |
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# %%Pages: |
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# Figure out |
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# 1. Number of pages in the document |
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# 2. Maximum number of pages in a student |
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# 3. Number of pages in each student. |
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my ($postscript_filename) = @_; |
my ($postscript_filename) = @_; |
open(PSFILE, "<$postscript_filename"); |
open(PSFILE, "<$postscript_filename"); |
my @psfilelines = <PSFILE>; |
my $line; |
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my $total_pages; # Total pages in document. |
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my $seen_pages = 0; # There are several %%Pages only the first is useful |
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my $student_number = 0; # Index of student we're working on. |
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my @pages_in_student; # For each student his/her initial page count. |
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my $max_pages = 0; # Pages in 'longest' student. |
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while ($line = <PSFILE>) { |
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my $page_number = 0; |
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# Check for total pages (%%Pages:) |
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if (($line =~ "^%%Pages:") && (!$seen_pages)) { |
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my @pageinfo = split(/ /,$line); |
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$total_pages = $pageinfo[1]; |
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$seen_pages = 1; |
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} |
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# Check for %%Page: n m $page_number will be the |
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# biggest of these until we see an endofstudent. |
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# Note that minipages generate spurious %Page: 1 1's so |
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# we only are looking for the largest n (n is page number at the |
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# bottom of the page, m the page number within the document. |
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# |
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if ($line =~ "^%%Page:") { |
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my @pageinfo = split(/ /, $line); |
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if ($page_number < $pageinfo[1]) { |
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$page_number = $pageinfo[1]; |
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} |
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} |
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# ENDOFSTUDENTSTAMP - save the page_number, reset and, if necessary |
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# udpate max_pages. |
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# |
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if ($line =~ "ENDOFSTUDENTSTAMP") { |
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$pages_in_student[$student_number] = $page_number; |
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$student_number++; |
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if ($page_number > $max_pages) { |
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$max_pages = $page_number; |
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} |
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$page_number = 0; |
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} |
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} |
close(PSFILE); |
close(PSFILE); |
my $psbody = join('', @psfilelines); |
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$psbody =~ s/STARTOFSTUDENTSTAMP//g; |
# Figure out how many total pages we need to add and adjust the |
$psbody =~ s/ENDOFSTUDENTSTAMP//g; |
# $total_pages accordingly: |
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# |
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my $add_pages = 0; |
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for (my $i =0; $i < $student_number; $i++) { |
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$add_pages += ($max_pages - $pages_in_student[$i]); |
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} |
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# If we don't need to add any pages, we're done! |
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# You might think that we don't need to do anything if |
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# there are no pages to add, however we still need to at least strip out |
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# the ENDOFSTUDENTSTAMP stamps...as they are not postscript comments!! |
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open(PSFILE, ">$postscript_filename"); |
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print PSFILE $psbody; |
# Now pass 2; we're going to write the new. ps file: |
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# - Modify its first %%Pages: line so that it has the new correct number of |
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# pages |
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# - For each student, insert as many blank pages as needed (and |
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# associated structured comments) to expand a student out to |
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# max_pages pages. |
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# - Remove the ENDOFSTUDENTSTAMP lines. |
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# |
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$total_pages += $add_pages; |
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$student_number = 0; |
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open(PSFILE, "<$postscript_filename"); |
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open(PSOFILE,">$postscript_filename"."repaginating"); # unique if original fname is. |
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$seen_pages = 0; # Reset seen %%Pages flag... |
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while ($line = <PSFILE>) { |
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if (($line =~ "^%%Pages:") && (!$seen_pages)) { |
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$line = "%%Pages: $total_pages\n"; |
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$seen_pages = 1; |
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} |
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if ($line =~ "ENDOFSTUDENTSTAMP") { |
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$add_pages = ($max_pages - $pages_in_student[$student_number]); |
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$line = "\n"; |
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my $last_student_page = $pages_in_student[$student_number]; |
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my $last_total_page = $student_number*$max_pages + $last_student_page; |
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while ($add_pages) { |
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$line .= "%Page: $last_student_page $last_total_page\n"; |
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my $bop = $last_total_page-1; |
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$line .= "TeXDict begin $last_student_page $bop bop eop end\n"; |
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$last_student_page++; |
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$last_total_page++; |
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$add_pages--; |
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} |
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$student_number++; |
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} |
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print PSOFILE $line; |
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} |
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close PSOFILE; |
close PSFILE; |
close PSFILE; |
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rename($postscript_filename."repaginating", $postscript_filename); |
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} |
} |
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