package PPD::Paper;

use PPD;

sub mm($) {
	my ($mm) = @_;
	return int($mm/25.4*72 + 0.5);
}

# Media parameters:
# 	Name		human-readable name
# 	W		width in PS points
# 	H		height in PS points
my %media = (
	'A0' => { Name => 'A0', W => mm(841), H => mm(1189) },
	'A1' => { Name => 'A1', W => mm(594), H => mm(841) },
	'A2' => { Name => 'A2', W => mm(420), H => mm(594) },
	'A3' => { Name => 'A3', W => mm(297), H => mm(420) },
	'A4' => { Name => 'A4', W => mm(210), H => mm(297) },
	'A5' => { Name => 'A5', W => mm(148), H => mm(210) },
	'A6' => { Name => 'A6', W => mm(105), H => mm(148) },
	'ISOB0' => { Name => 'B0', W => mm(1000), H => mm(1414) },
	'ISOB1' => { Name => 'B1', W => mm(707), H => mm(1000) },
	'ISOB2' => { Name => 'B2', W => mm(500), H => mm(707) },
	'ISOB3' => { Name => 'B3', W => mm(353), H => mm(500) },
	'ISOB4' => { Name => 'B4', W => mm(250), H => mm(353) },
	'ISOB5' => { Name => 'B5', W => mm(176), H => mm(250) },
	'ISOB6' => { Name => 'B6', W => mm(125), H => mm(176) },
	'EnvC0' => { Name => 'C0 Envelope', W => mm(917), H => mm(1297) },
	'EnvC1' => { Name => 'C1 Envelope', W => mm(648), H => mm(917) },
	'EnvC2' => { Name => 'C2 Envelope', W => mm(458), H => mm(648) },
	'EnvC3' => { Name => 'C3 Envelope', W => mm(324), H => mm(458) },
	'EnvC4' => { Name => 'C4 Envelope', W => mm(229), H => mm(324) },
	'EnvC5' => { Name => 'C5 Envelope', W => mm(162), H => mm(229) },
	'EnvC6' => { Name => 'C6 Envelope', W => mm(114), H => mm(162) },
	'EnvC7' => { Name => 'C7 Envelope', W => mm(81), H => mm(114) },
	'EnvC8' => { Name => 'C8 Envelope', W => mm(57), H => mm(81) },
	'Letter' => { Name => 'US Letter', W => 612, H => 792 },
	'Legal' => { Name => 'US Legal', W => 612, H => 1008 },
);

# add_papers({
#	MinW => pt,		# Minimum paper width (default: 0)
#	MaxW => pt,		# Maximum paper width (default: 595)
#	MinH => pt,		# Minimum paper height (default: 0)
#	MaxH => pt,		# Maximum paper height (default: 842)
#	MarginH => pt,		# Horizontal margin (default: 0)
#	MarginV => pt,		# Vertical margin (default: 0)
#	DefPaper => paper,	# Default paper type (default: A4)
#	JCL => 1,		# Paper should be handled via JCL (default: 0)
#	PSPageSize => PS,	# PS code for setting PageSize (subroutine called with ref to media object)
#	PSPageRegion => PS,	# The same for PageRegion (default: use PSPageSize)
#	PSCustomPageSize => PS,	# PS code for setting custom PageSize (default: use setpagedevice)
# })
sub add_papers($) {
	# Scan available paper formats
	my ($o) = @_;
	my $minw = $o->{MinW} // 0;
	my $maxw = $o->{MaxW} // 595;
	my $minh = $o->{MinH} // 0;
	my $maxh = $o->{MaxH} // 842;
	my $margh = $o->{MarginH} // 0;
	my $margv = $o->{MarginV} // 0;
	my $jcl = $o->{JCL} // 0;
	my %real_media = ();
	for my $p (keys %media) {
		my $m = $media{$p};
		$m->{W} >= $minw && $m->{W} <= $maxw && $m->{H} >= $minh && $m->{H} <= $maxh or next;
		$real_media{$p} = $m;
		$m->{Key} = $p;
	}
	$o->{DefPaper} //= 'A4';

	define_ui_group({ Key => 'Media', Name => 'Media settings' });

	option({
		Key => 'PageSize',
		Name => 'Page Size',
		Choice => 'PickOne',
		Priority => 20,
		JCL => $jcl,
		Values => [ map {
			my $k = $_;
			my $m = $real_media{$_};
			{
				Key => $k,
				Name => ($m->{Name} // $k),
				PS => &{$o->{PSPageSize}}($m),
			}
		} sort keys %real_media ],
		Default => $o->{DefPaper},
		Custom => {
			PS => $o->{PSCustomPageSize} // 'pop pop pop << /PageSize [5 -2 roll] >> setpagedevice',
			Params => [
				{ Key => 'Width', Unit => 'points', Min => $minw, Max => $maxw },
				{ Key => 'Height', Unit => 'points', Min => $minh, Max => $maxh },
				{ Key => 'WidthOffset', Unit => 'points', Min => 0, Max => 0 },
				{ Key => 'HeightOffset', Unit => 'points', Min => 0, Max => 0 },
				{ Key => 'Orientation', Unit => 'int', Min => 1, Max => 1 },
			]
		},
	});

	option({
		Key => 'PageRegion',
		Name => 'Page Region',
		Choice => 'PickOne',
		Priority => 21,
		JCL => $jcl,
		Values => [ map {
			my $k = $_;
			my $m = $real_media{$_};
			{
				Key => $k,
				Name => ($m->{Name} // $k),
				PS => &{$o->{PSPageRegion} // $o->{PSPageSize}}($m),
			}
		} sort keys %real_media ],
		Default => $o->{DefPaper},
	});

	option({
		Key => 'ImageableArea',
		Values => [ map {
			my $k = $_;
			my $m = $real_media{$_};
			{
				Key => $k,
				Name => ($m->{Name} // $k),
				PS => sprintf("%g %g %g %g", $margh, $margv, $m->{W} - $margh, $m->{H} - $margv),
			}
		} sort keys %real_media ],
		Default => $o->{DefPaper},
	});

	option({
		Key => 'PaperDimension',
		Values => [ map {
			my $k = $_;
			my $m = $real_media{$_};
			{
				Key => $k,
				Name => ($m->{Name} // $k),
				PS => sprintf("%d %d", $m->{W}, $m->{H}),
			}
		} sort keys %real_media ],
		Default => $o->{DefPaper},
	});

	declare('Media',
		[ 'LandscapeOrientation',	's',	'Plus90' ],
		[ 'MaxMediaWidth',		'q',	$maxw ],
		[ 'MaxMediaHeight',		'q',	$maxh ],
		[ 'HWMargins',			's',	sprintf("%g %g %g %g", $margh, $margv, $margh, $margv) ],	# left, bottom, right, top
	);

	option({
		Key => 'LeadingEdge',
		Values => [{ Key => 'PreferLong', PS => "", Default => 1 }],
	});
}

42;