#!/usr/bin/env perl -w
# -*- Mode: Perl; tab-width: 4; indent-tabs-mode: nil -*-
#
# This file is part of the LibreOffice project.
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This file incorporates work covered by the following license notice:
#
#   Licensed to the Apache Software Foundation (ASF) under one or more
#   contributor license agreements. See the NOTICE file distributed
#   with this work for additional information regarding copyright
#   ownership. The ASF licenses this file to you under the Apache
#   License, Version 2.0 (the "License"); you may not use this file
#   except in compliance with the License. You may obtain a copy of
#   the License at http://www.apache.org/licenses/LICENSE-2.0 .
#

my @global_list = ();
my %global_hash = ();
my $base_path;

sub read_icons($)
{
    my $fname = shift;
    my $fileh;
    my @images;
    if (! -e "$base_path/$fname") {
        print "Skipping non-existent $base_path/$fname\n";
        return @images;
    }
    open ($fileh, "$base_path/$fname") || die "Can't open $base_path/$fname: $!";
    while (<$fileh>) {
        m/xlink:href=\"\.uno:(\S+)\"\s+/ || next;
        push @images, lc($1);
    }
    close ($fileh);

    return @images;
}

# filter out already seen icons & do prefixing
sub read_new_icons($$)
{
    my $fname = shift;
    my $prefix = shift;
    my @images = read_icons ($fname);
    my @new_icons;
    my %new_icons;
    for my $icon (@images) {
        my $iname = "cmd/" . $prefix . $icon . ".png";
        if (!defined $global_hash{$iname} &&
            !defined $new_icons{$iname}) {
            push @new_icons, $iname;
            $new_icons{$iname} = 1;
        }
    }
    return @new_icons;
}

sub process_group($@)
{
    my $prefix = shift;
    my @uiconfigs = @_;
    my %group;
    my $cur_max = 1.0;

# a very noddy sorting algorithm
    for my $uiconfig (@uiconfigs) {
        my @images = read_new_icons ($uiconfig, $prefix);
        my $prev = '';
        for my $icon (@images) {
            if (!defined $group{$icon}) {
                if (!defined $group{$prev}) {
                    $group{$icon} = $cur_max;
                    $cur_max += 1.0;
                } else {
                    $group{$icon} = $group{$prev} + (1.0 - 0.5 / $cur_max);
                }
            } # else a duplicate
        }
    }
    for my $icon (sort { $group{$a} <=> $group{$b} } keys %group) {
        push @global_list, $icon;
        $global_hash{$icon} = 1;
    }
}

sub process_file($$)
{
    my @images = read_new_icons (shift, shift);

    for my $icon (@images) {
        push @global_list, $icon;
        $global_hash{$icon} = 1;
    }
}

sub chew_controlfile($)
{
    my $fname = shift;
    my $fileh;
    my @list;
    open ($fileh, $fname) || die "Can't open $fname: $!";
    while (<$fileh>) {
        /^\#/ && next;
        s/[\r\n]*$//;
        /^\s*$/ && next;

        my $line = $_;
        if ($line =~ s/^-- (\S+)\s*//) {
            # control code
            my $code = $1;
            my $small = (lc ($line) eq 'small');
            if (lc($code) eq 'group') {
                if (!$small) {
                    process_group ("lc_", @list);
                }
                process_group ("sc_", @list);
            } elsif (lc ($code) eq 'ordered') {
                if (!$small) {
                    for my $file (@list) {
                        process_file ($file, "lc_");
                    }
                }
                for my $file (@list) {
                    process_file ($file, "sc_");
                }
            } elsif (lc ($code) eq 'literal') {
                for my $file (@list) {
                    if (!defined $global_hash{$file}) {
                        push @global_list, $file;
                        $global_hash{$file} = 1;
                    }
                }
            } else {
                die ("Unknown code '$code'");
            }
            @list = ();
        } else {
            push @list, $line;
        }
    }
    close ($fileh);
}

if (!@ARGV) {
    print "image-sort <image-sort.lst> /path/to/OOOo/source/root\n";
    exit 1;
}

# where the control file lives
my $control = shift @ARGV;
# where the uiconfigs live
$base_path = shift @ARGV;
# output
if (@ARGV) {
    my $outf = shift @ARGV;
    open ($output, ">$outf") || die "Can't open $outf: $!";
    $stdout_out = 0;
} else {
    $output = STDOUT;
    $stdout_out = 1;
}

chew_controlfile ($control);

for my $icon (@global_list) {
    print $output $icon . "\n" if (!($icon =~ /^sc_/));
}
for my $icon (@global_list) {
    print $output $icon . "\n" if ($icon =~ /^sc_/);
}

close $output if (!$stdout_out);

# dnl vim:set shiftwidth=4 softtabstop=4 expandtab: