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authorH. Peter Anvin <hpa@zytor.com>2002-05-15 07:11:21 +0000
committerH. Peter Anvin <hpa@zytor.com>2002-05-15 07:11:21 +0000
commit916c52e376bf6aa7d49cd597b3c9cb8863584d80 (patch)
tree2f29e89de58fcf79a33f1140773cb9b7cc7c52a2 /doc/genps.pl
parentf1f1fa7148b33385650beef18a61de042aa595b3 (diff)
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New PS/PDF backend: first attempt at generating the index
Diffstat (limited to 'doc/genps.pl')
-rwxr-xr-xdoc/genps.pl442
1 files changed, 293 insertions, 149 deletions
diff --git a/doc/genps.pl b/doc/genps.pl
index 410bff00..3dc1be3a 100755
--- a/doc/genps.pl
+++ b/doc/genps.pl
@@ -27,6 +27,7 @@ require 'pswidth.ph'; # PostScript string width
idxspace => 24, # Minimum space between index title and pg#
idxindent => 32, # How much to indent a subindex entry
idxgutter => 24, # Space between index columns
+ idxcolumns => 2, # Number of index columns
);
# US-Letter paper
@@ -99,9 +100,21 @@ sub int2base($$) {
#
# Take a crossreference name and generate the PostScript name for it.
#
+# This hack produces a somewhat smaller PDF...
+#%ps_xref_list = ();
+#$ps_xref_next = 0;
+#sub ps_xref($) {
+# my($s) = @_;
+# my $q = $ps_xref_list{$s};
+# return $q if ( defined($ps_xref_list{$s}) );
+# $q = 'X'.int2base($ps_xref_next++, 52);
+# $ps_xref_list{$s} = $q;
+# return $q;
+#}
+
+# Somewhat bigger PDF, but one which obeys # URLs
sub ps_xref($) {
- my($s) = @_;
- return $s; # Identity transform should be OK for now
+ return @_[0];
}
#
@@ -111,7 +124,8 @@ sub ps_xref($) {
# arrays of pairs: [<size>, <metricref>]
#
# Each line is represented as:
-# [ [type,first|last,aux,fontset,page,ypos], [rendering array] ]
+# [ [type,first|last,aux,fontset,page,ypos,optional col],
+# [rendering array] ]
#
# A space character may be "squeezed" by up to this much
# (as a fraction of the normal width of a space.)
@@ -126,17 +140,28 @@ sub ps_flow_lines($$$@) {
my(@l) = (); # Current line
my(@ls) = (); # Accumulated output lines
my(@xd) = (); # Metadata that goes with subsequent text
+ my $hasmarker = 0; # Line has -6 marker
+ my $pastmarker = 0; # -6 marker found
+
+ # If there is a -6 marker anywhere in the paragraph,
+ # *each line* output needs to have a -6 marker
+ foreach $e ( @data ) {
+ $hasmarker = 1 if ( $$e[0] == -6 );
+ }
$w = 0;
foreach $e ( @data ) {
if ( $$e[0] < 0 ) {
# Type is metadata. Zero width.
- if ( $$e[0] < -1 ) {
- # -1 (end anchor) goes with the preceeding text, otherwise
- # with the subsequent text
- push(@xd, $e);
- } else {
+ if ( $$e[0] == -6 ) {
+ $pastmarker = 1;
+ }
+ if ( $$e[0] == -1 || $$e[0] == -6 ) {
+ # -1 (end anchor) or -6 (marker) goes with the preceeding
+ # text, otherwise with the subsequent text
push(@l, $e);
+ } else {
+ push(@xd, $e);
}
} else {
my $ew = ps_width($$e[1], $fontset->{fonts}->[$$e[0]][1]) *
@@ -152,7 +177,11 @@ sub ps_flow_lines($$$@) {
my $lx = scalar(@l)-1;
my @rm = ();
while ( $lx >= 0 ) {
- while ( $lx >= 0 && $l[$lx]->[0] < 0 ) { $lx-- }; # Skip metadata
+ while ( $lx >= 0 && $l[$lx]->[0] < 0 ) {
+ # Skip metadata
+ $pastmarker = 0 if ( $l[$lx]->[0] == -6 );
+ $lx--;
+ };
if ( $lx >= 0 ) {
if ( $l[$lx]->[1] eq ' ' ) {
splice(@l, $lx, 1);
@@ -165,20 +194,33 @@ sub ps_flow_lines($$$@) {
}
# Now @l contains the stuff to remain on the old line
- # If we broke the line inside a link of type -2 or -3,
- # then split the link into two.
+ # If we broke the line inside a link, then split the link
+ # into two.
my $lkref = undef;
foreach my $lc ( @l ) {
- if ( $$lc[0] == -2 || $$lc[0] == -3 ) {
+ if ( $$lc[0] == -2 || $$lc[0] == -3 || $lc[0] == -7 ) {
$lkref = $lc;
} elsif ( $$lc[0] == -1 ) {
undef $lkref;
}
}
- push(@l, [-1,undef]) if ( defined($lkref) );
+
+ if ( defined($lkref) ) {
+ push(@l, [-1,undef]); # Terminate old reference
+ unshift(@rm, $lkref); # Duplicate reference on new line
+ }
+
+ if ( $hasmarker ) {
+ if ( $pastmarker ) {
+ unshift(@rm,[-6,undef]); # New line starts with marker
+ } else {
+ push(@l,[-6,undef]); # Old line ends with marker
+ }
+ }
+
push(@ls, [[$type,0,undef,$fontset,0,0],[@l]]);
@l = @rm;
- unshift(@l, $lkref) if ( defined($lkref) );
+
$w = $sw = 0;
# Compute the width of the remainder array
for my $le ( @l ) {
@@ -247,6 +289,8 @@ sub ps_merge_chunks(@) {
# -3 begin weblink
# -4 index item anchor
# -5 crossref anchor
+# -6 left/right marker (used in the index)
+# -7 page link (used in the index)
# 0 normal
# 1 empatic (italic)
# 2 code (fixed spacing)
@@ -260,11 +304,11 @@ sub mkparaarray($@) {
my $chunk;
if ( $ptype =~ /^code/ ) {
- foreach $chunk ( @{$paras[$i]} ) {
+ foreach $chunk ( @chunks ) {
push(@para, [2, $chunk]);
}
} else {
- foreach $chunk ( @{$paras[$i]} ) {
+ foreach $chunk ( @chunks ) {
my $type = substr($chunk,0,2);
my $text = substr($chunk,2);
@@ -393,11 +437,16 @@ for ( $i = 0 ; $i < $npara ; $i++ ) {
#
# Add TOC to beginning of paragraph list
#
-unshift(@paras, @tocparas);
-unshift(@ptypes, @tocptypes);
+unshift(@paras, @tocparas); undef @tocparas;
+unshift(@ptypes, @tocptypes); undef @tocptypes;
$npara = scalar(@paras);
#
+# No lines generated, yet.
+#
+@pslines = ();
+
+#
# Line Auxilliary Information Types
#
$AuxStr = 1; # String
@@ -407,150 +456,204 @@ $AuxXRef = 4; # Cross reference as a name
$AuxNum = 5; # Number
#
-# Break or convert paragraphs into lines.
+# Break or convert paragraphs into lines, and push them
+# onto the @pslines array.
#
-@pslines = ();
-@pslinedata = ();
-$linewidth = $psconf{pagewidth}-$psconf{lmarg}-$psconf{rmarg};
-$bullwidth = $linewidth-$psconf{bulladj};
+sub ps_break_lines($$) {
+ my ($paras,$ptypes) = @_;
-for ( $i = 0 ; $i < $npara ; $i++ ) {
- my $xtype = $ptypes[$i];
- my $ptype = substr($xtype,0,4);
- my @data = @{$paras[$i]};
- my @ls = ();
- if ( $ptype eq 'code' ) {
- my $p;
- # Code paragraph; each chunk is a line
- foreach $p ( @data ) {
- push(@ls, [[$ptype,0,undef,\%TextFont,0,0],[$p]]);
- }
- $ls[0]->[0]->[1] |= 1; # First in para
- $ls[-1]->[0]->[1] |= 2; # Last in para
- } elsif ( $ptype eq 'chap' || $ptype eq 'appn' ) {
- # Chapters are flowed normally, but in an unusual font
- @ls = ps_flow_lines($linewidth, \%ChapFont, $ptype, @data);
- } elsif ( $ptype eq 'head' || $ptype eq 'subh' ) {
- unless ( $xtype =~ /^\S+ (\S+) :(.*)$/ ) {
- die "Bad para";
- }
- my $secn = $1;
- my $sech = $2;
- my $font = ($ptype eq 'head') ? \%HeadFont : \%SubhFont;
- @ls = ps_flow_lines($linewidth, $font, $ptype, @data);
- # We need the heading number as auxillary data
- $ls[0]->[0]->[2] = [[$AuxStr,$secn]];
- } elsif ( $ptype eq 'norm' ) {
- @ls = ps_flow_lines($linewidth, \%TextFont, $ptype, @data);
- } elsif ( $ptype eq 'bull' ) {
- @ls = ps_flow_lines($bullwidth, \%TextFont, $ptype, @data);
- } elsif ( $ptype =~ /^toc/ ) {
- unless ( $xtype =~/^\S+ :([^:]*):(.*)$/ ) {
- die "Bad para";
+ my $linewidth = $psconf{pagewidth}-$psconf{lmarg}-$psconf{rmarg};
+ my $bullwidth = $linewidth-$psconf{bulladj};
+ my $indxwidth = ($linewidth-$psconf{idxgutter})/$psconf{idxcolumns}
+ -$psconf{idxspace};
+
+ my $npara = scalar(@{$paras});
+ my $i;
+
+ for ( $i = 0 ; $i < $npara ; $i++ ) {
+ my $xtype = $ptypes->[$i];
+ my $ptype = substr($xtype,0,4);
+ my @data = @{$paras->[$i]};
+ my @ls = ();
+ if ( $ptype eq 'code' ) {
+ my $p;
+ # Code paragraph; each chunk is a line
+ foreach $p ( @data ) {
+ push(@ls, [[$ptype,0,undef,\%TextFont,0,0],[$p]]);
+ }
+ $ls[0]->[0]->[1] |= 1; # First in para
+ $ls[-1]->[0]->[1] |= 2; # Last in para
+ } elsif ( $ptype eq 'chap' || $ptype eq 'appn' ) {
+ # Chapters are flowed normally, but in an unusual font
+ @ls = ps_flow_lines($linewidth, \%ChapFont, $ptype, @data);
+ } elsif ( $ptype eq 'head' || $ptype eq 'subh' ) {
+ unless ( $xtype =~ /^\S+ (\S+) :(.*)$/ ) {
+ die "Bad para";
+ }
+ my $secn = $1;
+ my $sech = $2;
+ my $font = ($ptype eq 'head') ? \%HeadFont : \%SubhFont;
+ @ls = ps_flow_lines($linewidth, $font, $ptype, @data);
+ # We need the heading number as auxillary data
+ $ls[0]->[0]->[2] = [[$AuxStr,$secn]];
+ } elsif ( $ptype eq 'norm' ) {
+ @ls = ps_flow_lines($linewidth, \%TextFont, $ptype, @data);
+ } elsif ( $ptype eq 'bull' ) {
+ @ls = ps_flow_lines($bullwidth, \%TextFont, $ptype, @data);
+ } elsif ( $ptype =~ /^toc/ ) {
+ unless ( $xtype =~/^\S+ :([^:]*):(.*)$/ ) {
+ die "Bad para";
+ }
+ my $xref = $1;
+ my $refname = $2.' ';
+ my $ntoc = substr($ptype,3,1)+0;
+ my $refwidth = ps_width($refname, $TextFont{fonts}->[0][1]) *
+ ($TextFont{fonts}->[0][0]/1000);
+
+ @ls = ps_flow_lines($linewidth-$ntoc*$psconf{tocind}-
+ $psconf{tocpnz}-$refwidth,
+ \%TextFont, $ptype, @data);
+
+ # Auxilliary data: for the first line, the cross reference symbol
+ # and the reference name; for all lines but the first, the
+ # reference width; and for the last line, the page number
+ # as a string.
+ my $nl = scalar(@ls);
+ $ls[0]->[0]->[2] = [[$AuxStr,$refname], [$AuxXRef,$xref]];
+ for ( $j = 1 ; $j < $nl ; $j++ ) {
+ $ls[$j]->[0]->[2] = [[$AuxNum,$refwidth]];
+ }
+ push(@{$ls[$nl-1]->[0]->[2]}, [$AuxPageStr,$xref]);
+ } elsif ( $ptype =~ /^idx/ ) {
+ my $lvl = substr($ptype,3,1)+0;
+
+ @ls = ps_flow_lines($indxwidth-$lvl*$psconf{idxindent},
+ \%TextFont, $ptype, @data);
+ } else {
+ die "Unknown para type: $ptype";
}
- my $xref = $1;
- my $refname = $2.' ';
- my $ntoc = substr($ptype,3,1)+0;
- my $refwidth = ps_width($refname, $TextFont{fonts}->[0][1]) *
- ($TextFont{fonts}->[0][0]/1000);
-
- @ls = ps_flow_lines($linewidth-$ntoc*$psconf{tocind}-
- $psconf{tocpnz}-$refwidth,
- \%TextFont, $ptype, @data);
-
- # Auxilliary data: for the first line, the cross reference symbol
- # and the reference name; for all lines but the first, the
- # reference width; and for the last line, the page number
- # as a string.
- my $nl = scalar(@ls);
- $ls[0]->[0]->[2] = [[$AuxStr,$refname], [$AuxXRef,$xref]];
- for ( $j = 1 ; $j < $nl ; $j++ ) {
- $ls[$j]->[0]->[2] = [[$AuxNum,$refwidth]];
+ # Merge adjacent identical chunks
+ foreach $l ( @ls ) {
+ @{$$l[1]} = ps_merge_chunks(@{$$l[1]});
}
- push(@{$ls[$nl-1]->[0]->[2]}, [$AuxPageStr,$xref]);
- } else {
- die "Unknown para type: $ptype";
+ push(@pslines,@ls);
}
- # Merge adjacent identical chunks
- foreach $l ( @ls ) {
- @{$$l[1]} = ps_merge_chunks(@{$$l[1]});
- }
- push(@pslines,@ls);
}
+# Break the main body text into lines.
+ps_break_lines(\@paras, \@ptypes);
+
#
# Break lines in to pages
#
-# Paragraph types which should never be broken
-$nobreakregexp = "^(chap|appn|head|subh|toc.)\$";
-# Paragraph types which are heading (meaning they should not be broken
-# immediately after)
-$headingregexp = "^(chap|appn|head|subh)\$";
-
$curpage = 3; # First text page is page 3
$curypos = 0; # Space used on this page
+undef $columnstart; # Not outputting columnar text
+undef $curcolumn; # Current column
$nlines = scalar(@pslines);
-$upageheight = $psconf{pageheight}-$psconf{topmarg}-$psconf{botmarg};
+#
+# This formats lines inside the global @pslines array into pages,
+# updating the page and y-coordinate entries. Start at the
+# $startline position in @pslines and go to but not including
+# $endline. The global variables $curpage, $curypos, $columnstart
+# and $curcolumn are updated appropriately.
+#
+sub ps_break_pages($$) {
+ my($startline, $endline) = @_;
+
+ # Paragraph types which should never be broken
+ my $nobreakregexp = "^(chap|appn|head|subh|toc.|idx.)\$";
+ # Paragraph types which are heading (meaning they should not be broken
+ # immediately after)
+ my $headingregexp = "^(chap|appn|head|subh)\$";
+ # Paragraph types which are set in columnar format
+ my $columnregexp = "^idx.\$";
+
+ my $upageheight = $psconf{pageheight}-$psconf{topmarg}-$psconf{botmarg};
+
+ my $i;
+
+ for ( $i = $startline ; $i < $endline ; $i++ ) {
+ my $linfo = $pslines[$i]->[0];
+ if ( ($$linfo[0] eq 'chap' || $$linfo[0] eq 'appn' )
+ && ($$linfo[1] & 1) ) {
+ # First line of a new chapter heading. Start a new page.
+ undef $columnstart;
+ $curpage++ if ( $curypos > 0 || defined($columnstart) );
+ $curypos = $chapstart;
+ } elsif ( defined($columnstart) && $$linfo[0] !~ /$columnregexp/o ) {
+ undef $columnstart;
+ $curpage++;
+ $curypos = 0;
+ }
-for ( $i = 0 ; $i < $nlines ; $i++ ) {
- my $linfo = $pslines[$i]->[0];
- if ( ($$linfo[0] eq 'chap' || $$linfo[0] eq 'appn')
- && ($$linfo[1] & 1) ) {
- # First line of a new chapter heading. Start a new line.
- $curpage++ if ( $curypos > 0 );
- $curypos = $chapstart;
- }
+ if ( $$linfo[0] =~ /$columnregexp/o && !defined($columnstart) ) {
+ $columnstart = $curypos;
+ $curcolumn = 0;
+ }
- # Adjust position by the appropriate leading
- $curypos += $$linfo[3]->{leading};
-
- # Record the page and y-position
- $$linfo[4] = $curpage;
- $$linfo[5] = $curypos;
-
- if ( $curypos > $upageheight ) {
- # We need to break the page before this line.
- my $broken = 0; # No place found yet
- while ( !$broken && $pslines[$i]->[0]->[4] == $curpage ) {
- my $linfo = $pslines[$i]->[0];
- my $pinfo = $pslines[$i-1]->[0];
-
- if ( $$linfo[1] == 2 ) {
- # This would be an orphan, don't break.
- } elsif ( $$linfo[1] & 1 ) {
- # Sole line or start of paragraph. Break unless
- # the previous line was part of a heading.
- $broken = 1 if ( $$pinfo[0] !~ /$headingregexp/o );
+ # Adjust position by the appropriate leading
+ $curypos += $$linfo[3]->{leading};
+
+ # Record the page and y-position
+ $$linfo[4] = $curpage;
+ $$linfo[5] = $curypos;
+ $$linfo[6] = $curcolumn if ( defined($columnstart) );
+
+ if ( $curypos > $upageheight ) {
+ # We need to break the page before this line.
+ my $broken = 0; # No place found yet
+ while ( !$broken && $pslines[$i]->[0]->[4] == $curpage ) {
+ my $linfo = $pslines[$i]->[0];
+ my $pinfo = $pslines[$i-1]->[0];
+
+ if ( $$linfo[1] == 2 ) {
+ # This would be an orphan, don't break.
+ } elsif ( $$linfo[1] & 1 ) {
+ # Sole line or start of paragraph. Break unless
+ # the previous line was part of a heading.
+ $broken = 1 if ( $$pinfo[0] !~ /$headingregexp/o );
+ } else {
+ # Middle of paragraph. Break unless we're in a
+ # no-break paragraph, or the previous line would
+ # end up being a widow.
+ $broken = 1 if ( $$linfo[0] !~ /$nobreakregexp/o &&
+ $$pinfo[1] != 1 );
+ }
+ $i--;
+ }
+ die "Nowhere to break page $curpage\n" if ( !$broken );
+ # Now $i should point to line immediately before the break, i.e.
+ # the next paragraph should be the first on the new page
+ if ( defined($columnstart) &&
+ ++$curcolumn < $psconf{idxcolumns} ) {
+ # We're actually breaking text into columns, not pages
+ $curypos = $columnstart;
} else {
- # Middle of paragraph. Break unless we're in a
- # no-break paragraph, or the previous line would
- # end up being a widow.
- $broken = 1 if ( $$linfo[0] !~ /$nobreakregexp/o &&
- $$pinfo[1] != 1 );
+ undef $columnstart;
+ $curpage++;
+ $curypos = 0;
}
- $i--;
+ next;
}
- die "Nowhere to break page $curpage\n" if ( !$broken );
- # Now $i should point to line immediately before the break, i.e.
- # the next paragraph should be the first on the new page
- $curpage++;
- $curypos = 0;
- next;
- }
- # Add end of paragraph skip
- if ( $$linfo[1] & 2 ) {
- $curypos += $skiparray{$$linfo[0]};
+ # Add end of paragraph skip
+ if ( $$linfo[1] & 2 ) {
+ $curypos += $skiparray{$$linfo[0]};
+ }
}
}
+ps_break_pages(0,$nlines); # Break the main text body into pages
+
#
# Find the page number of all the indices
#
%ps_xref_page = (); # Crossref anchor pages
%ps_index_pages = (); # Index item pages
+$nlines = scalar(@pslines);
for ( $i = 0 ; $i < $nlines ; $i++ ) {
my $linfo = $pslines[$i]->[0];
foreach my $c ( @{$pslines[$i]->[1]} ) {
@@ -569,6 +672,48 @@ for ( $i = 0 ; $i < $nlines ; $i++ ) {
}
}
+#
+# Emit index paragraphs
+#
+$startofindex = scalar(@pslines);
+@ixparas = ([[-5,'index'],[0,'Index']]);
+@ixptypes = ('chap');
+
+foreach $k ( @ixentries ) {
+ my $n,$i;
+ my $ixptype = 'idx0';
+ my @ixpara = mkparaarray('idx0',@{$ixterms{$k}});
+
+ push(@ixpara, [-6,undef]); # Left/right marker
+ $i = 1; $n = scalar(@{$ps_index_pages{$k}});
+ foreach $p ( @{$ps_index_pages{$k}} ) {
+ if ( $i++ == $n ) {
+ push(@ixpara,[-7,$p],[0,"$p"],[-1,undef]);
+ } else {
+ push(@ixpara,[-7,$p],[0,"$p,"],[-1,undef],[0,' ']);
+ }
+ }
+
+ push(@ixparas, [@ixpara]);
+ push(@ixptypes, $ixptype);
+}
+
+#
+# Flow index paragraphs into lines
+#
+ps_break_lines(\@ixparas, \@ixptypes);
+
+#
+# Format index into pages
+#
+$nlines = scalar(@pslines);
+ps_break_pages($startofindex, $nlines);
+
+#
+# Push index onto bookmark list
+#
+push(@bookmarks, ['index', 0, 'Index']);
+
# Get the list of fonts used
%ps_all_fonts = ();
foreach $fset ( @AllFonts ) {
@@ -655,6 +800,7 @@ sub ps_start_page() {
print "%%BeginPageSetup\n";
print "save\n";
print "%%EndPageSetup\n";
+ print '/', $ps_page, " pa\n";
}
# End a PostScript page
@@ -711,19 +857,19 @@ ps_end_page(0);
$curpage = 3;
ps_start_page();
-for ( $i = 0 ; $i < $nlines ; $i++ ) {
- my $linfo = $pslines[$i]->[0];
-
+foreach $line ( @pslines ) {
+ my $linfo = $line->[0];
+
if ( $$linfo[4] != $curpage ) {
- ps_end_page(1);
- ps_start_page();
- $curpage = $$linfo[4];
+ ps_end_page(1);
+ ps_start_page();
+ $curpage = $$linfo[4];
}
print '[';
my $curfont = 0;
- foreach my $c ( @{$pslines[$i]->[1]} ) {
- if ( $$c[0] >= 0 ) {
+ foreach my $c ( @{$line->[1]} ) {
+ if ( $$c[0] >= 0 ) {
if ( $curfont != $$c[0] ) {
print ($curfont = $$c[0]);
}
@@ -738,6 +884,11 @@ for ( $i = 0 ; $i < $nlines ; $i++ ) {
# Index anchor -- ignore
} elsif ( $$c[0] == -5 ) {
print '{/',$$c[1],' xa}'; #xref anchor
+ } elsif ( $$c[0] == -6 ) {
+ print ']['; # Start a new array
+ $curfont = 0;
+ } elsif ( $$c[0] == -7 ) {
+ print '{/',$$c[1],' pl}'; # page link
} else {
die "Unknown annotation";
}
@@ -761,16 +912,9 @@ for ( $i = 0 ; $i < $nlines ; $i++ ) {
}
}
print ($psconf{pageheight}-$psconf{topmarg}-$$linfo[5]);
+ print ' ', $$linfo[6] if ( defined($$linfo[6]) );
print ' ', $$linfo[0].$$linfo[1], "\n";
}
ps_end_page(1);
print "%%EOF\n";
-
-# Emit index as comments for now
-foreach $k ( sort(keys(%ps_index_pages)) ) {
- print "% ",$k, ' ', join(',', @{$ps_index_pages{$k}});
- print ' [prefix]' if ( defined($ixhasprefix{$k}) );
- print ' [first]' if ( defined($ixcommafirst{$k}) );
- print "\n";
-}