#!/usr/bin/perl -w

## Run this first, to generate the x_*.cpp files from the TQt headers
## using kalyptus

my $kalyptusdir = "../../kalyptus";

use File::Basename;
use File::Copy qw|cp|;
use File::Compare;
use Cwd;

my $here = getcwd;
my $outdir = $here . "/generate.pl.tmpdir";
my $finaloutdir = $here;
my $defines = "qtdefines";
my $headerlist = "header_list";
my $definespath = "$here/$defines";
my $headerlistpath = "$here/$headerlist";

## Note: outdir and finaloutdir should NOT be the same dir!

# Delete all x_*.cpp files under outdir (or create outdir if nonexistent)
if (-d $outdir) { system "rm -f $outdir/x_*.cpp"; } else { mkdir $outdir; }

mkdir $finaloutdir unless (-d $finaloutdir);

#  Load the TQT_NO_* macros found in "qtdefines". They'll be passed to kalyptus
my $macros="";
if ( -e $definespath ){
    print "Found '$defines'. Reading preprocessor symbols from there...\n";
    $macros = " --defines=$definespath ";
}

# Need to cd to kalyptus's directory so that perl finds Ast.pm etc.
chdir "$kalyptusdir" or die "Couldn't go to $kalyptusdir (edit script to change dir)\n";

# Find out which header files we need to parse
# We don't want all of them - e.g. not template-based stuff
my %excludes = (
    'ntqaccessible.h' => 1,  # Accessibility support is not compiled by defaut
    'ntqassistantclient.h' => 1, # Not part of TQt (introduced in TQt-3.1)
    'ntqmotif.h' => 1,       # 
    'ntqmotifwidget.h' => 1, # Motif extension (introduced in TQt-3.1)
    'ntqmotifdialog.h' => 1, #
    'ntqxt.h' => 1, # Xt
    'ntqxtwidget.h' => 1, # Xt
    'ntqdns.h' => 1, # internal
    'ntqgl.h' => 1, # OpenGL
    'ntqglcolormap.h' => 1, # OpenGL
    'ntqnp.h' => 1, # NSPlugin
    'ntqwidgetfactory.h' => 1,  # Just an interface
    'ntqsharedmemory.h' => 1, # "not part of the TQt API" they say
    'ntqwindowsstyle.h' => 1, # TQt windowsstyle, plugin
    'ntqmotifstyle.h' => 1,
    'ntqcompactstyle.h' => 1,
    'ntqinterlacestyle.h' => 1,
    'ntqmotifplusstyle.h' => 1,
    'ntqsgistyle.h' => 1,
    'ntqplatinumstyle.h' => 1,
    'ntqcdestyle.h' => 1,
    'ntqwindowsxpstyle.h' => 1 # play on the safe side 
);

# Some systems have a TQTDIR = TDEDIR = PREFIX
# We need a complete list

my %includes;
open(HEADERS, $headerlistpath) or die "Couldn't open $headerlistpath: $!\n";
map { chomp ; $includes{$_} = 1 } <HEADERS>;
close HEADERS;

# Can we compile the OpenGl module ?
if("@KDE_HAVE_GL@" eq "yes")
{
    open(DEFS, $definespath);
    my @defs = <DEFS>;
    close DEFS;
    if(!grep(/TQT_NO_OPENGL/, @defs))
    {
      $excludes{'qgl.h'} = undef;
      $excludes{'qglcolormap.h'} = undef;
    }
    else
    {
      print STDERR "TQt was not compiled with OpenGL support...\n Skipping TQGL Classes.\n";
    }
}

# List TQt headers, and exclude the ones listed above
my @headers = ();

$qtinc= '@tqt_includes@';
opendir (QT, $qtinc) or die "Couldn't find $qtinc";
foreach $filename (readdir(QT)) {
    $entry = $qtinc."/".$filename;
    if ( ( -e $entry or -l $entry )         # A real file or a symlink
        && ( ! -d _ ) )                     # Not a symlink to a dir though
    {
        push(@headers, $entry)
          if ( !defined $excludes{$filename} # Not excluded
              && $includes{$filename}        # Known header
	      && $filename =~ /\.h$/ ); # Not a backup file etc. Only headers.
        undef $includes{$filename}
    }
}
closedir QT;

# Launch kalyptus
system "perl kalyptus @ARGV --globspace -fsmoke --name=qt $macros --no-cache --outputdir=$outdir @headers";
my $exit = $? >> 8;
exit $exit if ($exit);

# Generate diff for smokedata.cpp
unless ( -e "$finaloutdir/smokedata.cpp" ) {
    open( TOUCH, ">$finaloutdir/smokedata.cpp");
    close TOUCH;
}
system "diff -u $finaloutdir/smokedata.cpp $outdir/smokedata.cpp > $outdir/smokedata.cpp.diff";

# Copy changed or new files to finaloutdir
opendir (OUT, $outdir) or die "Couldn't opendir $outdir";
foreach $filename (readdir(OUT)) {
    next if ( -d "$outdir/$filename" ); # only files, not dirs
    my $docopy = 1;
    if ( -f "$finaloutdir/$filename" ) {
        $docopy = compare("$outdir/$filename", "$finaloutdir/$filename"); # 1 if files are differents
    }
    if ($docopy) {
	#print STDERR "Updating $filename...\n";
	cp("$outdir/$filename", "$finaloutdir/$filename");
    }
}
closedir OUT;

# Check for deleted files and warn
my $deleted = 0;
opendir(FINALOUT, $finaloutdir) or die "Couldn't opendir $finaloutdir";
foreach $filename (readdir(FINALOUT)) {
    next if ( -d "$finaloutdir/$filename" ); # only files, not dirs
    if ( $filename =~ /.cpp$/ && ! ($filename =~ /_la_closure.cpp/) && ! -f "$outdir/$filename" ) {
      print STDERR "Removing obsolete file $filename\n";
      unlink "$finaloutdir/$filename";
      $deleted = 1;
    }
}
closedir FINALOUT;

# Delete outdir
system "rm -rf $outdir";