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banal
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#!/usr/bin/perl -s
#
# Copyright (C) 2007 Geoffrey M. Voelker
#
# banal -- analyze pdf formatting
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Geoffrey M. Voelker (voelker@cs.ucsd.edu)
#
# todo:
# -- computer modern roman fonts
# -- embedded java script, remoteapproach.com
use Data::Dumper;
use File::Basename;
sub usage {
print <<EOF
usage: banal [-report | -stats | -judge [specs]] [-zoom=N] files
banal has three modes of operation:
-report print full formatting info for all pages. this mode is
the default if no mode is specified:
% banal paper.pdf
-stats print formatting info condensed into one line with fields
separated by tabs; useful for computing summary stats across
many papers.
fields are 'file', 'paper', 'text region', 'margins', 'font',
'leading', 'columns', 'pages', 'app'. for example:
% banal -stats *.pdf | cut -f 5
extracts font sizes from a set of pdf files.
-judge compare document formatting against a set of formatting
specifications:
-paper=type paper type ('letter' and 'A4' currently supported)
-pages=num max number of pages
-font=num min font size
-leading=num min leading
-cols=num max columns
-width=inches max text region width
-height=inches max text region height
-fudge=inches text region fudge factor (helps with latex
overflow; default is $banal_text_fudge inches)
specifications can consist of any and all elements in any
combination. for example:
% banal -judge -paper=letter -pages=14 -font=10 -leading=12 -width=6.5 -height=9 *.pdf
will check whether a set of pdf files conforms to formatting specs
that require 8.5" x 11" paper, max 14 pages, min 10 point font,
min 12 point leading, and a max text region of 6.5" x 9".
-format=lines|list
lines report format violations on multiple lines (default)
list report format violations on a single line separated by a
comma (e.g., for importing into a spreadsheet).
% banal -judge -format=list [specs] *.pdf
- - - - - - - - - - - - - - - - - -
-zoom=N passed to pdftohtml. -zoom=1 means do not pass a zoom argument,
and use pdftohtml\'s default zoom.
-version report the version of banal
EOF
}
# version
$banal_version = "1.2.2";
# zoom value
usage() if ((defined $zoom) && ($zoom !~ /^[1-9]\d*(\.\d*)?$/));
# mapping from pdftohtml units to inches
#$p2h_per_inch = 72;
$p2h_per_inch;
# scale factor from pdftohtml units to points
#$p2h_to_points = 72 / $p2h_per_inch;
$p2h_to_points;
# minimum amount of text on page for it to be interesting
$banal_min_density = 8000;
# fudge factor when judging text regions (in inches).
$banal_text_fudge = 0.05;
# minimum number of pages that have to fail the text region specs.
# often papers have 1-2 pages where text on a table or figure extends
# into the margin. when judging an entire paper, we'll let those slide...
$banal_judge_min_fail_pages = 3;
# policy to use to estimate leading
$banal_leading_policy;
# pdftohtml executable
if (exists $ENV{"PDFTOHTML"}) {
$pdftohtml = $ENV{"PDFTOHTML"};
} elsif (exists $ENV{"PHP_PDFTOHTML"}) {
$pdftohtml = $ENV{"PHP_PDFTOHTML"};
} elsif (defined $pdftohtml_prog) {
$pdftohtml = $pdftohtml_prog;
} else {
$pdftohtml = "pdftohtml";
}
#print STDERR "using $pdftohtml...\n";
# version of pdftohtml program
$p2h_version = 0;
# full path of file being analyzed
$banal_fullpath = '';
# file name of file being analyzed
$banal_filename = '';
# sketch of perl data structures used
$page = "
$num
$pagedata
$pagespec
";
$pagedata = "
";
$pagespec = "
$paperbb
$regionbb
$bodyfont
$ncols
";
$bbox = "
$top
$left
$width
$height
";
$segdata = "
%widths
%lefts
%rights
%tops
%bots
%leads
";
# return min key in hash
sub minkey ($) {
my ($href) = @_;
return (sort { $a <=> $b } keys %$href)[0];
}
# return max key in hash
sub maxkey ($) {
my ($href) = @_;
return (sort { $a <=> $b } keys %$href)[$#_ - 1];
}
# return key of mode of values in hash
sub modevalkey ($) {
my ($href) = @_;
my ($mode) = (keys %$href)[0];
map { $mode = $_ if ($href->{$_} > $href->{$mode}) } keys %$href;
return $mode;
}
# return max val in hash
sub maxval ($) {
my ($href) = @_;
my ($max) = (keys %$href)[0];
map { $max = $_ if ($href->{$_} > $href->{$max}) } keys %$href;
return $href->{$max};
}
# return 'a' == 'b'
sub bb_equal ($$) {
my ($a, $b) = @_;
return (($a->{top} == $b->{top}) &&
($a->{left} == $b->{left}) &&
($a->{height} == $b->{height}) &&
($a->{width} == $b->{width}));
}
# merge 'a' into 'b'
sub bb_merge ($$) {
my ($a, $b) = @_;
$b->{top} = $a->{top} if ($a->{top} < $b->{top});
$b->{left} = $a->{left} if ($a->{left} < $b->{left});
$b->{height} = $a->{height} if ($a->{height} > $b->{height});
$b->{width} = $a->{width} if ($a->{width} > $b->{width});
}
sub calc_page_body_font ($) {
my ($page) = @_;
my ($mode) = modevalkey ($page->{pagedata}->{segdata}->{byfont});
$page->{pagedata}->{bodyfont} = $page->{doc}->{fonts}->{$mode};
$page->{pagespec}->{bodyfont} = p2h_font_to_font_size ($page->{pagedata}->{bodyfont});
if ($page->{pagespec}->{bodyfont} == 0) {
print "$banal_filename: Error: Zero font on page $page->{num}, font id $mode\n";
}
}
sub utf8ascii_undo ($) {
my ($str) = @_;
return $str unless ($str =~ /^\\376\\377(\\\d\d\d.)*$/);
# string is UTF-8 in ASCII (not binary)
# (PDFCreator seems to like to do this, also freepdfconvert)
print "$banal_filename: ascii UTF-8: $title\n" if ($debug_docapp);
$str =~ s/\\376\\377//;
$str =~ s/\\000//g;
print "$banal_filename: unencoded: $str\n" if ($debug_docapp);
return $str;
}
sub utf8bin_undo ($) {
my ($str) = @_;
return $str unless ($str =~ /^\376\377(\000.)*$/);
# string is UTF-8 in binary
print "$banal_filename: bin UTF-8: $str\n" if ($debug_docapp);
$str =~ s/\376\377//;
$str =~ s/\000//g;
print "$banal_filename: unencoded $str\n" if ($debug_docapp);
return $str;
}
sub utf8revbin_undo ($) {
my ($str) = @_;
# bytes reversed: character then null bytes (ScanSoft on the Mac)
return $str unless ($str =~ /^\377\376(.\000)*$/);
# string is UTF-8 in binary
print "$banal_filename: rev bin UTF-8: $str\n" if ($debug_docapp);
$str =~ s/\377\376//;
$str =~ s/\000//g;
print "$banal_filename: unencoded $str\n" if ($debug_docapp);
return $str;
}
sub utf8hex_undo ($) {
my ($str) = @_;
return $str unless ($str =~ /^FEFF(00..)*$/i);
print "$banal_filename: hex UTF-8: $str\n" if ($debug_docapp);
$str =~ s/^FEFF//i;
$str =~ s/00//g;
print "$banal_filename: hex ascii: $str\n" if ($debug_docapp);
$str = pack ("H*", $str);
print "$banal_filename: packed $str\n" if ($debug_docapp);
return $str;
}
# inferring the document application has two steps:
# 1) extracting the doc metadata
# 2) mapping metadata info to an application
#
# for (1), ideally we could use a module or tool to extract the
# InfoDict from the end of the pdf file. but there are some cases
# where we need to peek outside the InfoDict for additional hints, so
# in the end we still have to scan through the pdf file ourselves.
#
# for (2), the world would be a simpler place if applications followed
# some kind of convention. but given the large combination of apps,
# pdf converters, and OSes, of course the world is not so simple. so,
# as usual, it's back to heuristics gathered from samples...
sub calc_doc_app ($) {
my ($doc) = @_;
my ($fname) = $doc->{fullpath};
my ($creator, $title, $producer, $creatortool, $ptex);
my ($rdftitle, $pdfproducer);
my ($indirect, $quartzpdf, $pdfmachine, $cmrfont, $texfont);
$creator = $title = $producer = $creatortool = $ptex = '';
$rdftitle = $pdfproducer = '';
$indirect = $quartzpdf = $pdfmachine = $cmrfont = $texfont = 0;
my ($app, @allapps);
$app = '';
@allapps = ();
if (!open (PDF, $fname)) {
print STDERR "$banal_filename: Error: Failed to open $fname for inferring doc app.";
$doc->{app} = 'unknown';
return;
}
while (<PDF>) {
if (m|\/Creator\s*\(([^\)]+)\)|) {
$creator = $1;
} elsif (m|\/Creator\s*<([^\)]+)>|) {
# UTF-8 ascii hex
$creator = utf8hex_undo ($1);
} elsif (m|\/Creator \d+ \d+ R|) {
# Indirection:
# << /Producer 313 0 R /Creator 314 0 R ...
$indirect = 1;
}
if (m|\/Title\s*\(([^\)]+)\)|) {
$title = $1;
} elsif (m|\/Title\s*<([^\)]+)>|) {
# UTF-8 ascii hex
$title = utf8hex_undo ($1);
} elsif (m|<dc:title>.+<rdf:li.+>(.+)</rdf:li>.+</dc:title>|) {
$rdftitle = $1;
} elsif (m|<dc:title>|) {
unless (m|</dc:title>|) {
while (<PDF>) {
last if (m|</dc:title>|);
next unless (m|<rdf:li.+>(.+)</rdf:li>|);
$rdftitle = $1;
}
}
}
if (m|\/Producer\s*\(([^\)]+)\)|) {
$producer = $1;
} elsif (m|\/Producer\s*<([^\)]+)>|) {
# UTF-8 ascii hex
$producer = utf8hex_undo ($1);
} elsif (m|<pdf:Producer>(.+)</pdf:Producer>|) {
$pdfproducer = $1;
}
# xap: Adobe Extensible Authoring and Publishing (early name, 5.0)
# xmp: Adobe Extensible Metadata Platform (final name)
if (m|<x[am]p:CreatorTool>(.+)<\/x[am]p:CreatorTool>|) {
$creatortool = $1;
}
if (m|<pdfx:PTEX|) {
# <pdfx:PTEX.Fullbanner>This is pdfTeX...</pdfx:PTEX.Fullbanner>
$ptex = 1;
}
if (m|\(Mac OS.+Quartz PDFContext\)|) {
# (Mac OS X 10.6.2 Quartz PDFContext) [producer indirection]
$quartzpdf = 1;
} elsif (m|\(TeX\)|) {
# (TeX) [creator indirection]
$tex = 1;
} elsif (m|% created by pdfMachine|) {
# tool doesn't bother to create any metadata whatsoever...
$pdfmachine = 1;
}
if (!$cmrfont && m|(\/BaseFont\s*\/\w+\+[Cc][Mm][Rr]\d+)|) {
# /BaseFont/EGYAWT+CMR8
$pdf_tools{'cmr fonts'}++;
$cmrfont = 1;
} elsif (!$texfont && m|/BaseFont\s*/\w+\+([Cc][Mm]\w\w\d+)|) {
$pdf_tools{'tex fonts'}++;
$texfont = $1;
}
}
close (PDF);
# undo any UTF-8 in ascii (literally "\376\377\000P\000r\000o...")
$title = utf8ascii_undo ($title) if ($title);
$creator = utf8ascii_undo ($creator) if ($creator);
$producer = utf8ascii_undo ($producer) if ($producer);
$creatortool = utf8ascii_undo ($creatortool) if ($creatortool);
$rdftitle = utf8ascii_undo ($rdftitle) if ($rdftitle);
$pdfproducer = utf8ascii_undo ($pdfproducer) if ($pdfproducer);
# undo any UTF-8 in binary
$title = utf8bin_undo ($title) if ($title);
$creator = utf8bin_undo ($creator) if ($creator);
$producer = utf8bin_undo ($producer) if ($producer);
$creatortool = utf8bin_undo ($creatortool) if ($creatortool);
$rdftitle = utf8bin_undo ($rdftitle) if ($rdftitle);
$pdfproducer = utf8bin_undo ($pdfproducer) if ($pdfproducer);
# undo any UTF-8 in binary (reversed)
$title = utf8revbin_undo ($title) if ($title);
$creator = utf8revbin_undo ($creator) if ($creator);
$producer = utf8revbin_undo ($producer) if ($producer);
$creatortool = utf8revbin_undo ($creatortool) if ($creatortool);
$rdftitle = utf8revbin_undo ($rdftitle) if ($rdftitle);
$pdfproducer = utf8revbin_undo ($pdfproducer) if ($pdfproducer);
$title = $rdftitle if (!$title && $rdftitle);
# Word
if ($creator =~ /Microsoft.+Word/) {
# Mac OS Quartz PDFContext, doPDF
$pdf_tools{'word in creator'}++;
$app = 'word';
} elsif ($title =~ /Microsoft Word \-/) {
# ps->pdf w/ gs, distiller
# often doc name in title after '-' (but not always)
$pdf_tools{'gs, distiller'}++;
$app = 'word';
} elsif ($title =~ /Proceedings Template \- WORD/i) {
$pdf_tools{'template'}++;
$app = 'word';
} elsif ($creator =~ /easyPDF/) {
# BCL easyPDF
$pdf_tools{'easyPDF'}++;
$app = 'word';
} elsif ($creator =~ /PDFCreator/) {
$pdf_tools{'PDFCreator'}++;
$app = 'word';
} elsif ($creator =~ /PDFMaker.+Word/) {
$pdf_tools{'PDFMaker'}++;
$app = 'word';
} elsif ($creator =~ /Sonic PDF/) {
$pdf_tools{'sonic pdf'}++;
$app = 'word';
} elsif ($creatortool =~ /Word/) {
# Adobe XMP metadata
$pdf_tools{'Acrobat PDFMaker'}++;
$app = 'word';
} elsif ($producer =~ /freepdfconvert|deskPDF|ReportLab|PDF reDirect/) {
$pdf_tools{'misc pdf tools'}++;
$app = 'word';
# } elsif ($creator =~ /\000M\000i\000c\000r\000o\000s\000o\000f\000t.+\000W\000o\000r\000d/i) {
# UTF-8 binary
# $pdf_tools{'Word (UTF-8)'}++;
# $app = 'word';
} elsif ($pdfmachine) {
$pdf_tools{'pdfmachine'}++;
$app = 'word';
} elsif ($title =~ /\.docx?$/i) {
# Amyuni puts the filename in the title
$pdf_tools{'doc(x) extension'}++;
$app = 'word';
}
if ($app) {
push (@allapps, $app);
$app = '';
# never seen this happen, but let's sanity check...
if ($cmrfont) {
print "$banal_filename: Warning: CMR font in Word doc?\n";
$pdf_tools{'** cmrfont in word doc'}++;
}
}
# TeX
if ($creator =~ /TeX/) {
$pdf_tools{'tex in creator'}++;
$app = 'tex';
} elsif ($creatortool =~ /(MiK)?TeX/) {
$pdf_tools{'(mik)tex in creatortool'}++;
$app = 'tex';
} elsif ($creator =~ /dvips/) {
$pdf_tools{'dvips in creator'}++;
$app = 'tex';
} elsif ($producer =~ /dvips/) {
$pdf_tools{'dvips in producer'}++;
$app = 'tex';
} elsif ($producer =~ /PrimoPDF/ && $title =~ /\.dvi$/) {
$pdf_tools{'primopdf'}++;
$app = 'tex';
} elsif (($creator =~ /gnuplot/) && ($producer =~ /Ghostscript|Distiller/)) {
# highly likely a tex document
$pdf_tools{'gnuplot + gs|dist'}++;
$app = 'tex';
} elsif ($producer =~ /Ghostscript|PDFContext|pstopdf|AntennaHouse PDF/ && !$creator && !$title) {
# just a producer tag, no other InfoDict metadata...
# have yet to see a Word doc that didn't like InfoDict metadata
$pdf_tools{'only producer'}++;
$app = 'tex';
} elsif ($indirect && $quartzpdf && $tex) {
if ($creator || $producer) {
print "$banal_filename: Warning: direct and indirect InfoDict entries\n";
}
$pdf_tools{'tex quartzpdf'}++;
$app = 'tex';
} elsif ($creatortool =~ /gnuplot/ && !$creator && !$producer && !$title) {
$pdf_tools{'only gnuplot'}++;
$app = 'tex';
} elsif ($ptex) {
$pdf_tools{'pdftex in pdfx'}++;
$app = 'tex';
} elsif ($producer =~ /Ghostscript/ && $title =~ /\.pdf$/) {
$pdf_tools{'gs ps to pdf'}++;
$app = 'tex';
} elsif ($cmrfont) {
$pdf_tools{'cmrfont'}++;
$app = 'tex';
}
if ($app) {
push (@allapps, $app);
$app = '';
}
# OpenOffice
if ($producer =~ /OpenOffice/) {
$pdf_tools{'open office'}++;
push (@allapps, 'openoffice');
}
if ($creator =~ /Interleaf/) {
$pdf_tools{'interleaf + distiller'}++;
push (@allapps, 'interleaf');
}
# FrameMaker (!)
if ($creator =~ /FrameMaker/) {
$pdf_tools{'frame'}++;
push (@allapps, 'framemaker');
}
# sanity check that we haven't matched more than one application,
# or whether we didn't match anything...
if (scalar (@allapps) > 1) {
print STDERR "$banal_filename: Error: multiple apps inferred: @allapps\n";
$app = 'unknown';
} elsif (scalar (@allapps) < 1) {
print STDERR "$banal_filename: Warning: failed to infer document app, using 'unknown'\n";
# print STDERR "$banal_filename: Creator: $creator\n" if ($creator);
# print STDERR "$banal_filename: Title: $title\n" if ($title);
# print STDERR "$banal_filename: Producer: $producer\n" if ($producer);
# print STDERR "$banal_filename: CreatorTool: $creatortool\n" if ($creatortool);
# print STDERR "$banal_filename: RDFTitle: $rdftitle\n" if ($rdftitle);
# print STDERR "$banal_filename: PDFProducer: $pdfproducer\n" if ($pdfproducer);
# print STDERR "$banal_filename: cmrfont\n" if ($cmrfont);
# print STDERR "$banal_filename: texfont $texfont\n" if ($texfont);
$app = 'unknown';
} else {
$app = $allapps[0];
}
# $pdf_tools{$app}++;
$doc->{app} = $app;
if ($debug_docapp) {
print STDERR "$banal_filename: Creator: $creator\n" if ($creator);
print STDERR "$banal_filename: Title: $title\n" if ($title);
print STDERR "$banal_filename: Producer: $producer\n" if ($producer);
print STDERR "$banal_filename: CreatorTool: $creatortool\n" if ($creatortool);
print STDERR "$banal_filename: RDFTitle: $rdftitle\n" if ($rdftitle);
print STDERR "$banal_filename: PDFProducer: $pdfproducer\n" if ($pdfproducer);
print STDERR "$banal_filename: cmrfont\n" if ($cmrfont);
print STDERR "$banal_filename: texfont $texfont\n" if ($texfont);
foreach $t (keys %pdf_tools) {
print "$t: $pdf_tools{$t}\n";
}
}
return;
}
sub calc_page_leading ($) {
my ($page) = @_;
# my ($mode) = modevalkey ($page->{pagedata}->{segdata}->{leads});
my ($mode, $segs);
$segs = $page->{pagedata}->{segdata_byfont}->{$page->{pagedata}->{bodyfont}->{id}};
$mode = modevalkey ($segs->{leads});
$count = $segs->{leads}->{$mode} +
$segs->{leads}->{$mode - 1} +
$segs->{leads}->{$mode + 1};
if ($count <= 0) {
$page->{pagespec}->{lead} = 0;
return;
}
if ($banal_leading_policy eq 'mode') {
print "using leading policy 'mode'\n" if ($debug_leading);
$lead = $mode * $p2h_to_points;
$lead *= 10;
$lead = int ($lead + 0.5);
$lead /= 10;
print "leading: $lead\n" if ($debug_leading);
$page->{pagespec}->{lead} = $lead;
return;
}
if ($debug_leading) {
# leading histogram
$ll = $segs->{leads};
foreach $k (sort { $a <=> $b } keys %$ll) {
my ($l) = int (($k * $p2h_to_points * 10) + 0.5);
$l /= 10;
print "$l ($segs->{leads}->{$k}) ";
}
print "\n";
}
$wsum = $mode * ($segs->{leads}->{$mode} / $count);
$wsum += ($mode - 1) * ($segs->{leads}->{$mode - 1} / $count);
$wsum += ($mode + 1) * ($segs->{leads}->{$mode + 1} / $count);
$lead = $wsum * $p2h_to_points;
$lead *= 10;
$lead = int ($lead + 0.5);
$lead /= 10;
$page->{pagespec}->{lead} = $lead;
# print Dumper ($segs->{leads});
}
sub calc_page_columns ($) {
my ($page) = @_;
my ($pagew);
my ($segs, $maxw, $colw, $ncols);
# use estimated width of text region as base
$pagew = $page->{pagespec}->{textbb}->{width};
# use the maximum width segment in the body font to estimate
# column width
$segs = $page->{pagedata}->{segdata_byfont}->{$page->{pagedata}->{bodyfont}->{id}};
# $maxw = maxkey ($segs->{widths});
$modew = modevalkey ($segs->{widths});
$colw = $modew / $p2h_per_inch;
if ($colw >= ($pagew / 2.0)) {
$ncols = 1;
} elsif (($colw < ($pagew / 2.0)) && ($colw >= ($pagew / 3.0))) {
$ncols = 2;
} elsif (($colw < ($pagew / 3.0)) && ($colw >= ($pagew / 4.0))) {
$ncols = 3;
} elsif (($colw < ($pagew / 4.0)) && ($colw >= ($pagew / 5.0))) {
$ncols = 4;
} elsif (($colw < ($pagew / 5.0)) && ($colw >= ($pagew / 6.0))) {
$ncols = 5;
} elsif (($colw < ($pagew / 6.0)) && ($colw >= ($pagew / 7.0))) {
$ncols = 6;
} elsif (($colw < ($pagew / 7.0)) && ($colw >= ($pagew / 8.0))) {
$ncols = 7;
} elsif ($page->{pagespec}->{density} < $banal_min_density) {
$ncols = 1;
} else {
my ($num) = $page->{num};
# print Dumper ($segs->{widths});
printf ("$banal_filename: Error (page $num): Unknown number of columns: width of typical text segment %.2fin, page %.2fin.\n", $colw, $pagew);
$ncols = 1;
}
$page->{pagedata}->{ncols} = $ncols;
$page->{pagespec}->{ncols} = $ncols;
}
sub calc_page_text_region ($$) {
my ($page, $segdata) = @_;
my ($minw, $maxw, $minh, $maxh);
my ($segs_minw, $segs_maxw);
$segs_minw = $segdata->{lefts};
$segs_maxw = $segdata->{rights};
# find the minimum left position among segments (must be
# multiple segments with that position to skip outliers)
$minw = 8 * $p2h_per_inch;
foreach $s (keys %$segs_minw) {
$minw = $s if (($s < $minw) && ($segs_minw->{$s} > 3));
}
# all consistency bets are off with low density pages
$minw = minkey ($segs_minw) if ($minw > 4 * $p2h_per_inch);
# find the maximum right position among segments (must be
# multiple segments with that position to skip outliers)
$maxw = 0;
foreach $s (keys %$segs_maxw) {
$maxw = $s if (($s > $maxw) && ($segs_maxw->{$s} >= 2));
}
# print "tmpw $tmpw maxw $maxw\n";
# if ($maxw < 600) {
# print Dumper ($segs_maxw);
# }
# unjustified text may not have multiple segments with the same
# max right position...fall back to just using the max right position
$maxw = maxkey ($segs_maxw) if ($maxw < $minw);
$maxw = $minw + minkey ($segdata->{widths}) if (!defined $maxw);
$maxw = $minw if ($maxw < $minw);
$minh = minkey ($segdata->{tops});
$maxh = maxkey ($segdata->{bots});
$page->{pagedata}->{textbb} = {
top => $minh,
left => $minw,
width => ($maxw - $minw),
height => ($maxh - $minh),
};
# print "$minw $maxw\n";
# print Dumper ($page->{pagedata}->{textbb});
$page->{pagespec}->{textbb} = {
top => $minh / $p2h_per_inch,
left => $minw / $p2h_per_inch,
width => ($maxw - $minw) / $p2h_per_inch,
height => ($maxh - $minh) / $p2h_per_inch,
};
return 1;
}
sub calc_page_density ($) {
my ($page) = @_;
my ($bfont, $density);
$bfont = $page->{pagedata}->{bodyfont}->{id};
$density = maxval ($page->{pagedata}->{segdata_byfont}->{$bfont}->{byfont});
$page->{pagespec}->{density} = $density;
}
sub calc_doc_body_font ($) {
my ($doc) = @_;
my ($fonts) = {};
for $i (1..$doc->{npages}) {
$page = $doc->{pages}->{$i};
$fonts->{$page->{pagespec}->{bodyfont}}++;
}
$doc->{pagespec}->{bodyfont} = modevalkey ($fonts);
}
sub calc_doc_leading ($) {
my ($doc) = @_;
my ($leads) = {};
my ($lmode, $page);
for $i (1..$doc->{npages}) {
$page = $doc->{pages}->{$i};
$leads->{$page->{pagespec}->{lead}}++;
}
$lmode = modevalkey ($leads);
# $use_raw_leading = 1;
if (!defined $use_raw_leading) {
# print "mode: $lmode\n";
# print "pages w mode: $leads->{$lmode}\n";
if ($leads->{$lmode} >= $doc->{npages} / 2) {
for $i (1..$doc->{npages}) {
$page = $doc->{pages}->{$i};
next if ($page->{pagespec}->{lead} == $lmode);
# print "abs diff: ", $lmode - $page->{pagespec}->{lead}, "\n";
if (abs ($lmode - $page->{pagespec}->{lead}) < 0.2) {
# print "setting to ", $lmode, "\n";
$page->{pagespec}->{lead} = $lmode;
}
}
}
}
if ($debug_leading) {
print "entire doc\n";
for $i (1..$doc->{npages}) {
$page = $doc->{pages}->{$i};
$segs = $page->{pagedata}->{segdata_byfont}->{$page->{pagedata}->{bodyfont}->{id}};
$leads = $segs->{leads};
foreach $k (keys %$leads) {
$doc_leads{$k} += $segs->{leads}->{$k};
$lcount++;
}
}
foreach $k (sort { $a <=> $b } keys %doc_leads) {
my ($l) = int (($k * $p2h_to_points * 10) + 0.5);
$l /= 10;
print "$l ($doc_leads{$k}) ";
}
print "\n";
{
$mode = modevalkey (\%doc_leads);
print "mvk $mode\n";
$count = $doc_leads{$mode} +
$doc_leads{$mode - 1} +
$doc_leads{$mode + 1};
$wsum = $mode * ($doc_leads{$mode} / $count);
print "b: ", $wsum, "\n";
$wsum += ($mode - 1) * ($doc_leads{$mode - 1} / $count);
$wsum += ($mode + 1) * ($doc_leads{$mode + 1} / $count);
$lead = $wsum * $p2h_to_points;
print "c: ", $lead, "\n";
$lead *= 10;
print "d: ", $lead, "\n";
$lead = int ($lead + 0.5);
$lead /= 10;
print "lead: $lead\n";
}
}
$doc->{pagespec}->{lead} = $lmode;
}
sub calc_doc_text_region ($) {
my ($doc) = @_;
my ($page, $maxw, $maxh, $minl, $mint, $rmarg, $bmarg);
$page = $doc->{pages}->{1};
$maxw = $page->{pagespec}->{textbb}->{width};
$maxh = $page->{pagespec}->{textbb}->{height};
$minl = $page->{pagespec}->{textbb}->{left};
$mint = $page->{pagespec}->{textbb}->{top};
for $i (2..$doc->{npages}) {
next if ($page->{density} < $banal_min_density);
$page = $doc->{pages}->{$i};
$maxw = $page->{pagespec}->{textbb}->{width} if
($page->{pagespec}->{textbb}->{width} > $maxw);
$maxh = $page->{pagespec}->{textbb}->{height} if
($page->{pagespec}->{textbb}->{height} > $maxh);
$minl = $page->{pagespec}->{textbb}->{left} if
($page->{pagespec}->{textbb}->{left} < $minl);
$mint = $page->{pagespec}->{textbb}->{top} if
($page->{pagespec}->{textbb}->{top} < $mint);
}
$doc->{textbb}->{width} = $maxw;
$doc->{textbb}->{height} = $maxh;
$doc->{textbb}->{left} = $minl;
$doc->{textbb}->{top} = $mint;
$rmarg = $doc->{pagespec}->{paperbb}->{width} - ($doc->{textbb}->{width} + $doc->{textbb}->{left});
$bmarg = $doc->{pagespec}->{paperbb}->{height} - ($doc->{textbb}->{height} + $doc->{textbb}->{top});
if ($rmarg < 0) {
print "r MARGIN\n";
}
if ($bmarg < 0) {
print "b MARGIN\n";
}
$doc->{textbb}->{rmarg} = $rmarg;
$doc->{textbb}->{bmarg} = $bmarg;
}
sub calc_doc_page_types ($) {
my ($doc) = @_;
my ($page, $font, $type);
$font = $doc->{pagespec}->{bodyfont};
for $i (1..$doc->{npages}) {
$page = $doc->{pages}->{$i};
$type = 'body';
if ($i == 1 && $page->{pagespec}->{density} < 3000) {
$type = 'cover';
} elsif ($page->{pagespec}->{bodyfont} < $font) {
if (($doc->{npages} - $i) < ($doc->{npages} / 3)) {
$type = 'bib';
}
} elsif ($page->{pagespec}->{density} < $banal_min_density) {
if ($i == $doc->{npages}) {
$type = 'bib';
} else {
$type = 'figure';
}
}
$page->{pagespec}->{type} = $type;
}
}
sub calc_doc_columns ($) {
my ($doc) = @_;
my ($page);
my ($cols) = {};
for $i (1..$doc->{npages}) {
$page = $doc->{pages}->{$i};
$cols->{$page->{pagespec}->{ncols}}++;
}
# number of columns on greatest number of pages
$doc->{ncols} = modevalkey ($cols);
}
sub p2h_font_to_font_size ($) {
my ($font) = @_;
my ($pt);
if ($font->{family} eq 'Times'
|| $font->{family} eq 'Helvetica'
|| $font->{family} eq 'Courier'
|| $font->{family} eq 'Symbol') {
$pt = ($font->{size} + 3) / $zoom;
} else {
print STDERR "$banal_filename: Error: Unknown font family.\n";
# print Dumper ($font);
$pt = 0;
}
return $pt;
}
sub p2h_font_bug ($) {
my ($doc) = @_;
return 1 if ($doc->{pagespec}->{bodyfont} <= 0);
return 0;
}
sub p2h_serious_font_bug ($) {
my ($doc) = @_;
return 0 if (!p2h_font_bug ($doc));
return 1 if ($doc->{textbb}->{width} == 0 ||
$doc->{textbb}->{height} == 0);
return 0;
}
sub report_verbose ($) {
my ($doc) = @_;
my ($page) = $doc->{pages}->{1};
print $file, "\n";
if (p2h_font_bug ($doc)) {
print STDERR $file, "\n";
print STDERR "$banal_filename: Error: pdftohtml encountered font problems...some info likely bogus.\n";
}
printf ("Paper size: %.2fin x %.2fin\n", $doc->{pagespec}->{paperbb}->{width}, $doc->{pagespec}->{paperbb}->{height});
printf ("Text region: %.2fin x %.2fin\n", $doc->{textbb}->{width},
$doc->{textbb}->{height});
printf ("Margins: %.2fin x %.2fin x %.2fin x %.2fin (l/r/t/b)\n",
$doc->{textbb}->{left},
$doc->{textbb}->{rmarg},
$doc->{textbb}->{top},
$doc->{textbb}->{bmarg});
printf ("Body font size: %.2fpt", $doc->{pagespec}->{bodyfont});
if (p2h_font_bug ($doc)) {
print " (bogus)";
}
print "\n";
printf ("Leading: %.1fpt\n", $doc->{pagespec}->{lead});
print "Columns: ", $page->{pagespec}->{ncols}, "\n";
print "Pages: ", $doc->{npages}, "\n";
print "App: ", $doc->{app}, "\n";
print "\n";
for $i (1..$doc->{npages}) {
$page = $doc->{pages}->{$i};
print "Page $page->{num}:\n";
printf (" text region: %.2fin x %.2fin\n", $page->{pagespec}->{textbb}->{width}, $page->{pagespec}->{textbb}->{height});
$left_i = $page->{pagespec}->{textbb}->{left};
$right_i = $page->{pagespec}->{paperbb}->{width} -