package PDF::API2::Resource::CIDFont;

use base 'PDF::API2::Resource::BaseFont';

use strict;
no warnings qw[ deprecated recursion uninitialized ];

our $VERSION = '2.035'; # VERSION

use Encode qw(:all);

use PDF::API2::Basic::PDF::Utils;
use PDF::API2::Util;

=head1 NAME

PDF::API2::Resource::CIDFont - Base class for CID fonts

=head1 METHODS

=over

=item $font = PDF::API2::Resource::CIDFont->new $pdf, $name

Returns a cid-font object. base class form all CID based fonts.

=cut

sub new
{
    my ($class,$pdf,$name,@opts) = @_;
    my %opts=();
    %opts=@opts if((scalar @opts)%2 == 0);

    $class = ref $class if ref $class;
    my $self=$class->SUPER::new($pdf,$name);
    $pdf->new_obj($self) if(defined($pdf) && !$self->is_obj($pdf));

    $self->{Type} = PDFName('Font');
    $self->{'Subtype'} = PDFName('Type0');
    $self->{'Encoding'} = PDFName('Identity-H');

    my $de=PDFDict();
    $pdf->new_obj($de);
    $self->{'DescendantFonts'} = PDFArray($de);

    $de->{'Type'} = PDFName('Font');
    $de->{'CIDSystemInfo'} = PDFDict();
    $de->{'CIDSystemInfo'}->{Registry} = PDFStr('Adobe');
    $de->{'CIDSystemInfo'}->{Ordering} = PDFStr('Identity');
    $de->{'CIDSystemInfo'}->{Supplement} = PDFNum(0);
    $de->{'CIDToGIDMap'} = PDFName('Identity');

    $self->{' de'} = $de;

    return($self);
}

sub glyphByCId { return( $_[0]->data->{g2n}->[$_[1]] ); }

sub uniByCId { return( $_[0]->data->{g2u}->[$_[1]] ); }

sub cidByUni { return( $_[0]->data->{u2g}->{$_[1]} ); }

sub cidByEnc { return( $_[0]->data->{e2g}->[$_[1]] ); }

sub wxByCId
{
    my $self=shift @_;
    my $g=shift @_;
    my $w;

    if(ref($self->data->{wx}) eq 'ARRAY' && defined $self->data->{wx}->[$g])
    {
        $w = int($self->data->{wx}->[$g]);
    }
    elsif(ref($self->data->{wx}) eq 'HASH' && defined $self->data->{wx}->{$g})
    {
        $w = int($self->data->{wx}->{$g});
    }
    else
    {
        $w = $self->missingwidth;
    }

    return($w);
}

sub wxByUni { return( $_[0]->wxByCId($_[0]->data->{u2g}->{$_[1]}) ); }
sub wxByEnc { return( $_[0]->wxByCId($_[0]->data->{e2g}->[$_[1]]) ); }

sub width
{
    my ($self,$text)=@_;
    return($self->width_cid($self->cidsByStr($text)));
}

sub width_cid
{
    my ($self,$text)=@_;
    my $width=0;
    my $lastglyph=0;
    foreach my $n (unpack('n*',$text))
    {
        $width+=$self->wxByCId($n);
        if($self->{-dokern} && $self->haveKernPairs())
        {
            if($self->kernPairCid($lastglyph, $n))
            {
                $width-=$self->kernPairCid($lastglyph, $n);
            }
        }
        $lastglyph=$n;
    }
    $width/=1000;
    return($width);
}

=item $cidstring = $font->cidsByStr $string

Returns the cid-string from string based on the fonts encoding map.

=cut

sub _cidsByStr
{
    my ($self,$s)=@_;
    $s=pack('n*',map { $self->cidByEnc($_) } unpack('C*',$s));
    return($s);
}

sub cidsByStr
{
    my ($self,$text)=@_;
    if(utf8::is_utf8($text) && defined $self->data->{decode} && $self->data->{decode} ne 'ident')
    {
        $text=encode($self->data->{decode},$text);
    }
    elsif(utf8::is_utf8($text) && $self->data->{decode} eq 'ident')
    {
        $text=$self->cidsByUtf($text);
    }
    elsif(!utf8::is_utf8($text) && defined $self->data->{encode} && $self->data->{decode} eq 'ident')
    {
        $text=$self->cidsByUtf(decode($self->data->{encode},$text));
    }
    elsif(!utf8::is_utf8($text) && $self->can('issymbol') && $self->issymbol && $self->data->{decode} eq 'ident')
    {
        $text=pack('U*',(map { $_+0xf000 } unpack('C*',$text)));
        $text=$self->cidsByUtf($text);
    }
    else
    {
        $text=$self->_cidsByStr($text);
    }
    return($text);
}

=item $cidstring = $font->cidsByUtf $utf8string

Returns the cid-encoded string from utf8-string.

=cut

sub cidsByUtf {
    my ($self,$s)=@_;
    $s=pack('n*',map { $self->cidByUni($_) } (map { $_>0x7f && $_<0xA0 ? uniByName(nameByUni($_)): $_ } unpack('U*',$s)));
    utf8::downgrade($s);
    return($s);
}

sub textByStr
{
    my ($self,$text)=@_;
    return($self->text_cid($self->cidsByStr($text)));
}

sub textByStrKern
{
    my ($self,$text,$size,$ident)=@_;
    return($self->text_cid_kern($self->cidsByStr($text),$size,$ident));
}

sub text
{
    my ($self,$text,$size,$ident)=@_;
    my $newtext=$self->textByStr($text);
    if(defined $size && $self->{-dokern})
    {
        $newtext=$self->textByStrKern($text,$size,$ident);
        return($newtext);
    }
    elsif(defined $size)
    {
        if(defined($ident) && $ident!=0)
        {
	        return("[ $ident $newtext ] TJ");
        }
        else
        {
	        return("$newtext Tj");
        }
    }
    else
    {
        return($newtext);
    }
}

sub text_cid
{
    my ($self,$text,$size)=@_;
    if($self->can('fontfile'))
    {
        foreach my $g (unpack('n*',$text))
        {
            $self->fontfile->subsetByCId($g);
        }
    }
    my $newtext=unpack('H*',$text);
    if(defined $size)
    {
        return("<$newtext> Tj");
    }
    else
    {
        return("<$newtext>");
    }
}

sub text_cid_kern
{
    my ($self,$text,$size,$ident)=@_;
    if($self->can('fontfile'))
    {
        foreach my $g (unpack('n*',$text))
        {
            $self->fontfile->subsetByCId($g);
        }
    }
    if(defined $size && $self->{-dokern} && $self->haveKernPairs())
    {
        my $newtext=' ';
        my $lastglyph=0;
        my $tBefore=0;
        foreach my $n (unpack('n*',$text))
        {
            if($self->kernPairCid($lastglyph, $n))
            {
                $newtext.='> ' if($tBefore);
                $newtext.=sprintf('%i ',$self->kernPairCid($lastglyph, $n));
                $tBefore=0;
            }
            $lastglyph=$n;
            my $t=sprintf('%04X',$n);
            $newtext.='<' if(!$tBefore);
            $newtext.=$t;
            $tBefore=1;
        }
        $newtext.='> ' if($tBefore);
        if(defined($ident) && $ident!=0)
        {
	        return("[ $ident $newtext ] TJ");
        }
        else
        {
            return("[ $newtext ] TJ");
        }
    }
    elsif(defined $size)
    {
        my $newtext=unpack('H*',$text);
        if(defined($ident) && $ident!=0)
        {
	        return("[ $ident <$newtext> ] TJ");
        }
        else
        {
	        return("<$newtext> Tj");
        }
    }
    else
    {
        my $newtext=unpack('H*',$text);
        return("<$newtext>");
    }
}

sub kernPairCid
{
    return(0);
}

sub haveKernPairs
{
    return(0);
}

sub encodeByName
{
    my ($self,$enc) = @_;
    return if($self->issymbol);

    $self->data->{e2u}=[ map { $_>0x7f && $_<0xA0 ? uniByName(nameByUni($_)): $_ } unpack('U*',decode($enc, pack('C*',0..255))) ] if(defined $enc);
    $self->data->{e2n}=[ map { $self->data->{g2n}->[$self->data->{u2g}->{$_} || 0] || '.notdef' } @{$self->data->{e2u}} ];
    $self->data->{e2g}=[ map { $self->data->{u2g}->{$_} || 0 } @{$self->data->{e2u}} ];

    $self->data->{u2e}={};
    foreach my $n (reverse 0..255)
    {
        $self->data->{u2e}->{$self->data->{e2u}->[$n]}=$n unless(defined $self->data->{u2e}->{$self->data->{e2u}->[$n]});
    }

    return($self);
}

sub subsetByCId
{
    return(1);
}

sub subvec
{
    return(1);
}

sub glyphNum
{
    my $self=shift @_;
    if(defined $self->data->{glyphs})
    {
        return ( $self->data->{glyphs} );
    }
    return ( scalar @{$self->data->{wx}} );
}

=back

=cut

1;
