fix fixing of navigation with multiple files

doc/fixnavi.pl

@@ -2,37 +2,82 @@
 
 use strict;
 
-@ARGV == 1 or die "usage: $0 <qdoc-file>\n";
-my $file = $ARGV[0];
-open FILE, $file or die "File $file cannot be opened.\n";
+my @files = ();
+my %defines = ();
+for (@ARGV) {
+    if (/^-D(.*)$/) {
+        $defines{$1} = 1;
+    } elsif (/^-/) {
+        printf STDERR "Unknown option '".$_."'\n";
+        exit 1;
+    } else {
+        push @files, $_;
+    }
+}
+
+int(@files) or die "usage: $0 [-D<define>]... <qdoc-file>\n";
+
 my @toc = ();
 my %title2page = ();
 my $doctitle = "";
 my $curpage = "";
 my $intoc = 0;
-while (<FILE>) {
-    if (keys(%title2page) == 1 && /^\h*\\list/) {
-        $intoc++;
-    } elsif (!$intoc) {
-        if (/^\h*\\page\h+(\H+)/) {
-            $curpage = $1;
-        } elsif (/^\h*\\title\h+(.+)$/) {
-            if ($curpage eq "") {
-                die "Title '$1' appears in no \\page.\n";
+my %prev_skips = ();
+my %next_skips = ();
+my %define_skips = ();
+my %polarity_skips = ();
+my $prev_skip = "";
+my $next_skip = "";
+my $define_skip = "";
+my $polarity_skip = 0;
+for my $file (@files) {
+    my $skipping = 0; # no nested ifs!
+    open FILE, $file or die "File $file cannot be opened.\n";
+    while (<FILE>) {
+        if (/^\h*\\if\h+defined\h*\(\h*(\H+)\h*\)/) {
+            $skipping = !defined($defines{$1});
+            if (!$intoc) {
+                $define_skip = $1;
+                $polarity_skip = $skipping;
+            }
+        } elsif (/^\h*\\else/) {
+            $skipping = 1 - $skipping;
+        } elsif (/^\h*\\endif/) {
+            $skipping = 0;
+        } elsif (keys(%title2page) == 1 && /^\h*\\list/) {
+            $intoc++;
+        } elsif (!$intoc) {
+            if ($skipping && /^\h*\\previouspage\h+(\H+)/) {
+                $prev_skip = $1;
+            } elsif ($skipping && /^\h*\\nextpage\h+(\H+)/) {
+                $next_skip = $1;
+            } elsif (/^\h*\\page\h+(\H+)/) {
+                $curpage = $1;
+            } elsif (/^\h*\\title\h+(.+)$/) {
+                if ($curpage eq "") {
+                    die "Title '$1' appears in no \\page.\n";
+                }
+                if (length($define_skip)) {
+                     $define_skips{$1} = $define_skip;
+                     $polarity_skips{$1} = $polarity_skip;
+                     $prev_skips{$1} = $prev_skip;
+                     $next_skips{$1} = $next_skip;
+                     $define_skip = $prev_skip = $next_skip = "";
+                }
+                $title2page{$1} = $curpage;
+                $doctitle = $1 if (!$doctitle);
+                $curpage = "";
+            }
+        } else {
+            if (/^\h*\\endlist/) {
+                $intoc--;
+            } elsif (!$skipping && /^\h*\\o\h+\\l\h*{(.*)}$/) {
+                push @toc, $1;
             }
-            $title2page{$1} = $curpage;
-            $doctitle = $1 if (!$doctitle);
-            $curpage = "";
-        }
-    } else {
-        if (/^\h*\\endlist/) {
-            $intoc--;
-        } elsif (/^\h*\\o\h+\\l\h*{(.*)}$/) {
-            push @toc, $1;
         }
     }
+    close FILE;
 }
-close FILE;
 
 my %prev = ();
 my %next = ();
@@ -43,28 +88,57 @@ for my $title (@toc) {
     $last = $title;
 }
 
-open IN, $file or die "File $file cannot be opened a second time?!\n";
-open OUT, '>'.$file.".out" or die "File $file.out cannot be created.\n";
-my $cutting = 0;
-while (<IN>) {
-    if (!$cutting) {
-        if (/^\h*\\contentspage/) {
-            $cutting = 1;
-        }
-    } else {
-        if (/^\h*\\title\h+(.+)$/) {
-            print OUT "    \\previouspage ".$prev{$1} if ($prev{$1});
-            print OUT "    \\page ".$title2page{$1};
-            print OUT "    \\nextpage ".$next{$1} if ($next{$1});
-            print OUT "\n";
-            $cutting = 0;
+for my $file (@files) {
+    open IN, $file or die "File $file cannot be opened a second time?!\n";
+    open OUT, '>'.$file.".out" or die "File $file.out cannot be created.\n";
+    my $cutting = 0;
+    while (<IN>) {
+        if (!$cutting) {
+            if (/^\h*\\contentspage/) {
+                $cutting = 1;
+            }
         } else {
-            next;
+            if (/^\h*\\title\h+(.+)$/) {
+                if (defined($define_skips{$1})) {
+                    print OUT "    \\if defined(".$define_skips{$1}.")\n";
+                    if ($polarity_skips{$1}) {
+                        print OUT "    \\previouspage ".$prev_skips{$1} if ($prev_skips{$1});
+                        print OUT "    \\else\n";
+                    }
+                }
+                print OUT "    \\previouspage ".$prev{$1} if ($prev{$1});
+                if (defined($define_skips{$1})) {
+                    if (!$polarity_skips{$1}) {
+                        print OUT "    \\else\n";
+                        print OUT "    \\previouspage ".$prev_skips{$1} if ($prev_skips{$1});
+                    }
+                    print OUT "    \\endif\n";
+                }
+                print OUT "    \\page ".$title2page{$1};
+                if (defined($define_skips{$1})) {
+                    print OUT "    \\if defined(".$define_skips{$1}.")\n";
+                    if ($polarity_skips{$1}) {
+                        print OUT "    \\nextpage ".$next_skips{$1} if ($next_skips{$1});
+                        print OUT "    \\else\n";
+                    }
+                }
+                print OUT "    \\nextpage ".$next{$1} if ($next{$1});
+                if (defined($define_skips{$1})) {
+                    if (!$polarity_skips{$1}) {
+                        print OUT "    \\else\n";
+                        print OUT "    \\nextpage ".$next_skips{$1} if ($next_skips{$1});
+                    }
+                    print OUT "    \\endif\n";
+                }
+                print OUT "\n";
+                $cutting = 0;
+            } else {
+                next;
+            }
         }
+        print OUT $_;
     }
-    print OUT $_;
+    close OUT;
+    close IN;
+    rename($file.".out", $file) or die "Cannot replace $file with new version.\n";
 }
-close OUT;
-close IN;
-
-rename($file.".out", $file) or die "Cannot replace $file with new version.\n";