#!@XML_I18N_TOOLS_PERL@ -w 
# -*- Mode: perl; indent-tabs-mode: nil; c-basic-offset: 4  -*-

#
#  The XML Translation Extractor
#
#  Copyright (C) 2000 Free Software Foundation.
#
#  This library 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 script 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 library; if not, write to the Free Software
#  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
#  Authors: Kenneth Christiansen <kenneth@gnu.org>
#           Darin Adler <darin@eazel.com>
#

## Release information
my $PROGRAM      = "xml-i18n-extract";
my $PACKAGE      = "xml-i18n-tools";
my $VERSION      = "0.9";

## Script options - Enable by setting value to 1
my $ENABLE_INI   = "1"; ## desktop and alike files
my $ENABLE_KEYS  = "1"; ## mimetype descriptions
my $ENABLE_GLADE = "1"; ## glade files
my $ENABLE_XML 	 = "1"; ## generic xml files

## Loaded modules
use strict; 
use File::Basename;
use Getopt::Long;

## Scalars used by the option stuff
my $TYPE_ARG	= "0";
my $LOCAL_ARG	= "0";
my $HELP_ARG 	= "0";
my $VERSION_ARG = "0";
my $UPDATE_ARG  = "0";
my $QUIET_ARG   = "0";

my $FILE;
my $OUTFILE;

my $gettext_type = "";
my $input;
my %messages = ();

## Always print first
$| = 1;

## Handle options
GetOptions (
	    "type=s"     => \$TYPE_ARG,
            "local|l"    => \$LOCAL_ARG,
            "help|h|?"   => \$HELP_ARG,
            "version|v"  => \$VERSION_ARG,
            "update"     => \$UPDATE_ARG,
	    "quiet|q"    => \$QUIET_ARG,
            ) or &error;

&split_on_argument;


## Check for options. 
## This section will check for the different options.

sub split_on_argument {

    if ($VERSION_ARG) {
        &version;

    } elsif ($HELP_ARG) {
	&help;
        
    } elsif ($LOCAL_ARG) {
        &place_local;
        &extract;

    } elsif ($UPDATE_ARG) {
	&place_normal;
	&extract;

    } elsif (@ARGV > 0) {
	&place_normal;
	&message;
	&extract;

    } else {
	&help;

    }  
}    

sub place_normal {
    $FILE	 = $ARGV[0];
    $OUTFILE     = "$FILE.h";
}   

sub place_local {
    $OUTFILE     = fileparse($FILE, ());
    if (!-e "tmp/") { 
        system("mkdir tmp/"); 
    }
    $OUTFILE     = "./tmp/$OUTFILE.h"
}

sub determine_type {
   if ($TYPE_ARG =~ /^gettext\/(.*)/) {
	$gettext_type=$1
   }
}

## Sub for printing release information
sub version{
    print "${PROGRAM} (${PACKAGE}) $VERSION\n";
    print "Copyright (C) 2000 Free Software Foundation, Inc.\n";
    print "Written by Kenneth Christiansen, 2000.\n\n";
    print "This is free software; see the source for copying conditions. There is NO\n";
    print "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n";
    exit;
}

## Sub for printing usage information
sub help{
    print "Usage: ${PROGRAM} [FILENAME] [OPTIONS] ...\n";
    print "Generates a header file from an xml source file.\n\nGrabs all strings ";
    print "between <_translatable_node> and it's end tag,\nwhere tag are all allowed ";
    print "xml tags. Read the docs for more info.\n\n"; 
    print "  -v, --version                shows the version\n";
    print "  -h, --help                   shows this help page\n";
    print "  -q, --quiet                  quiet mode\n";
    print "\nReport bugs to <kenneth\@gnu.org>.\n";
    exit;
}

## Sub for printing error messages
sub error{
#   print "xml-i18n-extract: invalid option @ARGV\n";
    print "Try `${PROGRAM} --help' for more information.\n";
    exit;
}

sub message {
    print "Generating C format header file for translation.\n";
}

sub extract {
    &determine_type;

    &convert ($FILE);

    open OUT, ">$OUTFILE";
    &msg_write;
    close OUT;

    print "Wrote $OUTFILE\n" unless $QUIET_ARG;
}

sub convert($) {

    ## Reading the file
    {
	local (*IN);
	local $/; #slurp mode
	open (IN, "<$FILE") || die "can't open $FILE: $!";
	$input = <IN>;
    }

    &type_ini;
    &type_keys;
    &type_xml;
    &type_glade;
}

sub type_ini {

    if ($ENABLE_INI) { 
        
        ### For generic translatable desktop files ###
    
        if ($gettext_type eq "ini"){    

            while ($input =~ /^_.*=(.*)$/mg) {
                $messages{$1} = [];
            }
        }
    }
}

sub type_keys {
    
    if ($ENABLE_KEYS) {
    
        ### For generic translatable mime/keys files ###

        if ($gettext_type eq "keys"){
            while ($input =~ /^\s*_\w+=(.*)$/mg) {
                $messages{$1} = [];
            }
        }
    }
}

sub type_xml {

    if ($ENABLE_XML) {

	### For generic translatable XML files ###
        
        if ($gettext_type eq "xml"){

            while ($input =~ /[\t\n\s]_\w+=\"([^\"]+)\"/sg) {
                $messages{$1} = [];
            }

            while ($input =~ /<_(\w+)>([^<]+)<\/_\1>/sg) {
                $messages{$2} = [];
            }

	}
    }
}

sub type_glade {

    if ($ENABLE_GLADE) {
        
        ### For translatable Glade XML files ###

        if ($gettext_type eq "glade"){

            my $translate = "label|title|text|format|copyright|comments|
                             preview_text|tooltip";

            while ($input =~ /<($translate)>([^<]+)<\/($translate)>/sg) {

                # Glade has some bugs, especially it uses translations tags to contain little
                # non-translatable content. We work around this, by not including these
                # strings that only includes something like: label4, and window1
                if ($2 !~ /^(window|label)[0-9]+$/) {
                    $messages{$2} = [];
                }
            }
            
            while ($input =~ /<items>(..[^<]*)<\/items>/sg) {
                my @items =  split (/\n/, $1);
                for (my $n = 0; $n < @items; $n++) {
                    $messages{$items[$n]} = [];
                }
            }

	}
    }

}

sub msg_write {
    
    foreach my $message (sort keys %messages) { 
        
        my ($tag) = @{ $messages{$message} };
        
        # Replace XML entities for some special characters with
        # the appropriate gettext syntax for those characters.
     	$message =~ s/&quot;/\\"/mg; # "
    	$message =~ s/&lt;/</mg;
    	$message =~ s/&gt;/>/mg;
     	$message =~ s/&amp;/&/mg;
       
   	print OUT "/* xgettext:no-c-format */\n" if $message =~ /%/;
    	print OUT "/* $tag */\n" if $tag;
        
    	my @lines = split (/\n/, $message);

    	for (my $n = 0; $n < @lines; $n++) {

            if ($n == 0) { 
 		print OUT "char *s = N_(\""; 
            } else {  
 		print OUT "             \""; 
	    }

            print OUT $lines[$n];

            if ($n < @lines - 1) { 
		print OUT "\\n\"\n"; 
 	    } else { 
		print OUT "\");\n";  
	    }
        }
    }
}