summaryrefslogtreecommitdiffstats
path: root/lib/Xconfig/xfree.pm
blob: f03bc88f286784a57483c99d7bab22c3ab156fcc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
package Xconfig::xfree; # $Id$

my ($Revision) = '$Revision$' =~ /(\d+)/;

use diagnostics;
use strict;

use common;
use Xconfig::parse;

#- mostly internal only
sub new {
    my ($class, $raw) = @_;
    @$raw && bless { raw => $raw }, $class;
}

sub _conf_file() {
    "$::prefix/etc/X11/xorg.conf";
}

################################################################################
# I/O ##########################################################################
################################################################################
sub read {
    my ($class) = @_;
    my $raw_X = $class->new(Xconfig::parse::read_XF86Config(_conf_file())) or return;
    $raw_X->{before} = $raw_X->prepare_write;

    if (my ($keyboard) = $raw_X->get_InputDevices('keyboard')) {
	$keyboard->{Driver}{val} = 'kbd';
    }
    if (my ($keyboard) = $raw_X->get_InputDevices('Keyboard')) {
	$keyboard->{Driver}{val} = 'kbd';
    }

    #- ugly hack to fix empty ModeLine lines, XFdrake seems to generate some, but where???
    #- at least this allows fixing the pb by re-running XFdrake 
    foreach ($raw_X->get_Sections('Monitor')) {
	my $l = $_->{ModeLine} or next;
	@$l = grep { $_->{val} } @$l;
    }

    foreach ($raw_X->get_Sections('Device')) {
	$_->{Driver} && $_->{Driver}{val} eq 'i810' and $_->{Driver}{val} = 'intel';
    }

    $raw_X;
}
sub write {
    my ($raw_X, $o_file) = @_;
    my $file = $o_file || _conf_file();
    if (!$o_file) {
	renamef($file, "$file.old");
    }
    no_ModeLine_on_fglrx($raw_X); #- HACK
    set_Revision($raw_X);
    Xconfig::parse::write_XF86Config($raw_X->{raw}, $file);
}
sub prepare_write {
    my ($raw_X) = @_;
    set_Revision($raw_X);
    join('', Xconfig::parse::prepare_write_XF86Config($raw_X->{raw}));
}
sub is_modified {
    my ($raw_X) = @_;
    $raw_X->{before} ne $raw_X->prepare_write;
}
sub is_only_resolution_modified {
    my ($raw_X) = @_;
    ($raw_X->{after_set_resolutions} || $raw_X->{before}) eq $raw_X->prepare_write;
}
sub empty_config {
    my ($class) = @_;
    $class->new(Xconfig::parse::read_XF86Config_from_string(our $default_header));
}

my $mark = '# File generated by XFdrake';
sub get_Revision {
    my ($raw_X) = @_;
    my $first = $raw_X->{raw}[0];
    $first->{pre_comment} =~ /^\Q$mark\E \(rev (\d+)\)/ && $1;
}
sub set_Revision {
    my ($raw_X) = @_;
    my $first = $raw_X->{raw}[0];
    my $first_comment = $first->{pre_comment};

    my $was_there = $first_comment =~ s/^\Q$mark\E.*\n//;
    $first->{pre_comment} = "$mark (rev $Revision)\n" . ($was_there ? '' : "\n") . $first_comment;
}

################################################################################
# keyboard #####################################################################
################################################################################
my @keyboard_fields = qw(XkbLayout XkbModel XkbDisable XkbOptions XkbCompat);
sub get_keyboard {
    my ($raw_X) = @_;
    my $raw_kbd = _raw_get_keyboard($raw_X) or die "no keyboard section";
    raw_export_section($raw_kbd, \@keyboard_fields);
}
sub set_keyboard {
    my ($raw_X, $kbd) = @_;
    my $raw_kbd = _raw_get_keyboard($raw_X) || _new_keyboard_section($raw_X);
    raw_import_section($raw_kbd, $kbd);
    _set_Option('keyboard', $raw_kbd, keys %$kbd);
}
sub _raw_get_keyboard {
    my ($raw_X) = @_;
    first($raw_X->get_Sections('InputDevice', sub { 
	my ($entry) = @_;
	my $Driver = val($entry->{Driver});
	$Driver eq 'kbd' || $Driver eq 'evdev' && val($entry->{XkbLayout});
    }));
}
sub _new_keyboard_section {
    my ($raw_X) = @_;
    my $raw_kbd = { Identifier => { val => 'Keyboard1' }, Driver => { val => 'kbd' } };
    $raw_X->add_Section('InputDevice', $raw_kbd);

    my $layout = get_ServerLayout($raw_X)->{InputDevice} ||= [];
    push @$layout, { val => '"Keyboard1" "CoreKeyboard"' };

    $raw_kbd;
}


################################################################################
# mouse ########################################################################
################################################################################
#- example mouse: { Protocol => 'IMPS/2', Device => '/dev/psaux', Emulate3Buttons => undef, Emulate3Timeout => 50, ZAxisMapping => [ '4 5', '6 7' ] }
#- example evdev: { bustype => '0x0003', vendor => '0x045e', product => '0x008c' }
my @mouse_fields = qw(Protocol Device ZAxisMapping Emulate3Buttons Emulate3Timeout bustype vendor product); #-);
sub get_mice {
    my ($raw_X) = @_;
    my @raw_mice = $raw_X->get_Sections('InputDevice', \&_is_mouse);
    map { raw_export_section($_, \@mouse_fields) } @raw_mice;
}
sub set_mice {
    my ($raw_X, @mice) = @_;
    @mice =  grep { $_->{Driver} || !$_->{Protocol} } @mice;
    my @raw_mice = _new_mouse_sections($raw_X, map { delete $_->{Driver} || 'evdev' } @mice);
    mapn { 
	my ($raw_mouse, $mouse) = @_;
	raw_import_section($raw_mouse, $mouse);
	_set_Option('mouse', $raw_mouse, keys %$mouse);
    } \@raw_mice, \@mice;
}
sub _is_mouse {
    my ($entry) = @_;
    my $Driver = val($entry->{Driver});
    member($Driver, qw(mouse vboxmouse vmmouse)) || $Driver eq 'evdev' && !val($entry->{XkbLayout});
}
sub _new_mouse_sections {
    my ($raw_X, @Drivers) = @_;
    $raw_X->remove_InputDevices_when(\&_is_mouse);
    
    @Drivers or return;
    
    my @l = map_index {
	my $h = { Identifier => { val => 'Mouse' . ($::i + 1) }, Driver => { val => $_ } };
	$raw_X->add_Section('InputDevice', $h);
    } @Drivers;

    my $layout = get_ServerLayout($raw_X)->{InputDevice} ||= [];    
    push @$layout, { val => qq("Mouse1" "CorePointer") };
    push @$layout, { val => qq("Mouse$_" "SendCoreEvents") } foreach 2 .. @Drivers;
    
    @l;
}


################################################################################
# resolution ###################################################################
################################################################################
sub get_resolution {
    my ($raw_X, $o_Screen) = @_;
    first(get_resolutions($raw_X, $o_Screen));
}
sub get_resolutions {
    my ($raw_X, $o_Screen) = @_;
    my $Screen = $o_Screen || $raw_X->get_default_screen or return {};
    
    my $depth = val($Screen->{DefaultColorDepth} || $Screen->{DefaultDepth});
    my $Display = find { !$depth || val($_->{l}{Depth}) eq $depth } @{$Screen->{Display} || []} or return { automatic => 1, Depth => $depth };
    my $s = val($Display->{l}{Virtual} || $Display->{l}{Modes});
    my @l;
    while ($s =~ /(\d+)(x|\s+)(\d+)/g) {
	push @l, { X => $1, Y => $3, Depth => val($Display->{l}{Depth}) };
    }
    @l ? @l : { automatic => 1, Depth => $depth };
}
sub set_resolutions {
    my ($raw_X, $resolutions, $o_Screen) = @_;
    
    my $Depth = $resolutions->[0]{Depth} eq '32' ? 24 : $resolutions->[0]{Depth};
    my $only_resolution = $raw_X->is_only_resolution_modified;
    
    foreach my $Screen ($o_Screen ? $o_Screen : $raw_X->get_Sections('Screen')) {
	$Screen ||= $raw_X->get_default_screen or internal_error('no screen');
	
	delete $Screen->{DefaultDepth};
	$only_resolution &&= $Screen->{DefaultColorDepth} && $Screen->{DefaultColorDepth}{val} eq $Depth;
	if ($resolutions->[0]{X}) {
	    #- if the existing config is using Virtual, keep Virtual, otherwise default to Modes
	    my $Mode_name = (any { $_->{l}{Virtual} } @{$Screen->{Display} || []}) ? 'Virtual' : 'Modes';

	    my @l = $Mode_name eq 'Modes' ? @$resolutions : first(@$resolutions);
	    my @Modes = map { sprintf($Mode_name eq 'Modes' ? '"%dx%d"' : '%d %d', @$_{'X', 'Y'}) } @l;

	    $Screen->{Display} = [ map {
		{ l => { Depth => { val => $_ }, $Mode_name => { val => join(' ', @Modes) } } };
	    } 8, 15, 16, 24 ];
	} else {
	    delete $Screen->{Display};
	}
	if ($Depth) {
	    $Screen->{DefaultColorDepth} = { val => $Depth };
	} else {
	    delete $Screen->{DefaultColorDepth};
	}
    }
    add_gtf_ModeLines($raw_X, $resolutions) if $resolutions->[0]{X};

    $raw_X->{after_set_resolutions} = $only_resolution ? $raw_X->prepare_write : '';
}


################################################################################
# device #######################################################################
################################################################################
my @device_fields = qw(VendorName BoardName Driver VideoRam Screen BusID); #-);
sub get_device {
    my ($raw_X) = @_;
    first(get_devices($raw_X));
}
sub get_devices {
    my ($raw_X) = @_;
    my @raw_devices = $raw_X->get_Sections('Device');
    map {
	my $raw_device = $_;
	my $device = raw_export_section($raw_device, [ 'Identifier', @device_fields ]);
	$device->{Options} = raw_export_section($raw_device, [ grep { (deref_array($raw_device->{$_}))[0]->{Option} } keys %$raw_device ]);
	$device;
    } @raw_devices;
}
sub set_devices {
    my ($raw_X, @devices) = @_;
    my @raw_devices = _new_device_sections($raw_X, int @devices);
    mapn { 
	my ($raw_device, $device) = @_;
	my %Options  = %{$device->{Options} || {}};
	raw_import_section($raw_device, $device, \@device_fields);
	raw_import_section($raw_device, \%Options);
	$_->{Option} = 1 foreach map { deref_array($raw_device->{$_}) } keys %Options;
	$raw_device->{''} = [ { post_comment => $device->{raw_LINES} } ] if $device->{raw_LINES};
    } \@raw_devices, \@devices;
}
sub _new_device_sections {
    my ($raw_X, $nb_new) = @_;
    $raw_X->remove_Section('Device');
    map { $raw_X->add_Section('Device', { Identifier => { val => "device$_" }, DPMS => { Option => 1 } }) } (1 .. $nb_new);
}
sub get_Driver {
    my ($raw_X) = @_;
    my $card = eval { $raw_X->get_device };
    $card && $card->{Driver};
}

################################################################################
# wacoms #######################################################################
################################################################################
sub set_wacoms {
    my ($raw_X, @wacoms) = @_;
    $raw_X->remove_InputDevices('wacom');
    
    @wacoms or return;
    
    my @Modes = ('Stylus', 'Eraser', 'Cursor', 'Pad');
   
    my $layout = get_ServerLayout($raw_X)->{InputDevice} ||= [];    
    each_index {
	my $wacom = $_;
	foreach (@Modes) {
	    next if ($wacom->{USB});
	    my $identifier = $_ . ($::i + 1);
	    my $h = { Identifier => { val => $identifier }, 
		      Driver => { val => 'wacom' },
		      Type => { val => lc $_, Option => 1 },
		      Device => { val => $wacom->{Device}, Option => 1 }
		    };
	    $raw_X->add_Section('InputDevice', $h);
	    push @$layout, { val => qq("$identifier" "SendCoreEvents") };
	}
    } @wacoms;
}

################################################################################
# monitor ######################################################################
################################################################################
my @monitor_fields = qw(VendorName ModelName HorizSync VertRefresh PreferredMode);
sub get_monitors {
    my ($raw_X) = @_;
    my @raw_monitors = $raw_X->get_Sections('Monitor');
    map { 
	my $h = raw_export_section($_, [ 'Identifier', @monitor_fields ]);
	$h->{ModeLine} = $_->{ModeLine} if $_->{ModeLine};
	$h;
    } @raw_monitors;
}
sub set_monitors {
    my ($raw_X, @monitors) = @_;
    my @raw_monitors = _new_monitor_sections($raw_X, int @monitors);
    mapn { 
	my ($raw_monitor, $monitor) = @_;
	raw_import_section($raw_monitor, $monitor, \@monitor_fields);
	$raw_monitor->{PreferredMode}{Option} = 1 if $raw_monitor->{PreferredMode};
	$raw_monitor->{ModeLine} = $monitor->{ModeLine} if $monitor->{ModeLine};
    } \@raw_monitors, \@monitors;
}
sub get_or_new_monitors {
    my ($raw_X, $nb_new) = @_;
    my @monitors = $raw_X->get_monitors;

    #- ensure we have exactly $nb_new monitors;
    if ($nb_new > @monitors) {
	@monitors, ({}) x ($nb_new - @monitors);
    } else {
	splice(@monitors, 0, $nb_new);
    }
}
sub _new_monitor_sections {
    my ($raw_X, $nb_new) = @_;
    $raw_X->remove_Section('Monitor');
    map { $raw_X->add_Section('Monitor', { Identifier => { val => "monitor$_" }, ModeLine => default_ModeLine() }) } (1 .. $nb_new);
}
sub default_ModeLine() {
    ModeLine_from_string(qq(Section "Monitor"\n) . (our $default_ModeLine) . qq(EndSection\n));
}

sub XxY {
    my ($resolution) = @_;
    $resolution && $resolution->{X} && $resolution->{Y} && 
      $resolution->{X} . 'x' . $resolution->{Y};
}

sub xorg_builtin_resolution {
    my ($X, $Y) = @_;
    my $res = $X . 'x' . $Y;

    $res eq '1280x1024' ||
      $res ne '1400x1050' && $res ne '1152x864' && $Xconfig::xfree::resolution2ratio{$res} eq '4/3';
}

sub resolution2ratio {
    my ($resolution, $b_non_strict) = @_;
    my $res = XxY($resolution);
    $res eq '1280x1024' && $b_non_strict ? '4/3' : $Xconfig::xfree::resolution2ratio{$res};
}

sub add_gtf_ModeLines {
    my ($raw_X, $resolutions) = @_;

    my $banner = 'modeline generated by gtf(1) [handled by XFdrake]';
    my @to_add;
    if (!xorg_builtin_resolution($resolutions->[0]{X}, $resolutions->[0]{Y})) {
	@to_add = map { 
	  my $resolution = $_;
	  map {
	    my $s = run_program::rooted_get_stdout($::prefix, 'gtf', $resolution->{X}, $resolution->{Y}, $_);
	    if (my ($name, $val) = $s =~ /ModeLine\s*"(.*)"(.*)/i) {
		chomp $val;
		$name =~ s/\.00//;	#- nicer that way
		{ val => qq("${name}"$val), pre_comment => "# $banner\n" };
	    } else { () }
	  } reverse(sort_numbers(@Xconfig::xfree::vfreqs));
	} @$resolutions;
    }

    $raw_X->set_monitors(map {
	@{$_->{ModeLine}} = (
	    (grep { index($_->{pre_comment}, $banner) == -1 } @{$_->{ModeLine}}),
	    @to_add,
	);
	$_;
    } $raw_X->get_monitors);
    
    1;
}

#- HACK for fglrx (#30934)
sub no_ModeLine_on_fglrx {
    my ($raw_X) = @_;

    if (get_Driver($raw_X) eq 'fglrx') {
	delete $_->{ModeLine} foreach $raw_X->get_Sections('Monitor');
    }
}

################################################################################
# screens ######################################################################
################################################################################
sub get_default_screen {
    my ($raw_X) = @_;
    my @l = $raw_X->get_Sections('Screen');
    (find { $_->{Identifier} && val($_->{Identifier}) eq 'screen1' || 
	      $_->{Driver} && val($_->{Driver}) =~ /svga|accel/ } @l) || $l[0];
}
sub set_screens {
    my ($raw_X, @screens) = @_;
    my @raw_screens = _new_screen_sections($raw_X, int @screens);
    mapn { 
	my ($raw_screen, $screen) = @_;
	raw_import_section($raw_screen, $screen);
    } \@raw_screens, \@screens;
}
sub _new_screen_sections {
    my ($raw_X, $nb_new) = @_;
    $raw_X->remove_Section('Screen');
    my @l = map { $raw_X->add_Section('Screen', { Identifier => { val => "screen$_" } }) } (1 .. $nb_new);

    get_ServerLayout($raw_X)->{Screen} = [ 
	{ val => qq("screen1") },
	map { { val => sprintf('"screen%d" RightOf "screen%d"', $_, $_ - 1) } } (2 .. $nb_new)
    ];
    @l;
}
sub is_fbdev {
    my ($raw_X, $o_Screen) = @_;

    my $Screen = $o_Screen || $raw_X->get_default_screen or return;

    my $Device = $raw_X->get_Section_by_Identifier('Device', val($Screen->{Device})) or internal_error("no device named $Screen->{Device}");
    val($Device->{Driver}) eq 'fbdev';
}




################################################################################
# modules ######################################################################
################################################################################
sub get_modules {
    my ($raw_X) = @_;
    my $raw_Module = $raw_X->get_Section('Module') or return;
    my $Module = raw_export_section($raw_Module, ['Load']);
    @{$Module->{Load} || []};
}
sub get_disabled_modules {
    my ($raw_X) = @_;
    my $raw_Module = $raw_X->get_Section('Module') or return;
    my $Module = raw_export_section($raw_Module, ['Disable']);
    @{$Module->{Disable} || []};
}
sub add_load_module {
    my ($raw_X, $module) = @_;
    my $raw_Module = $raw_X->get_Section('Module') || $raw_X->add_Section('Module', {});

    my %load_modules_comment = (
	dbe => 'Double-Buffering Extension',
	v4l => 'Video for Linux',
	dri => 'direct rendering',
	glx => '3D layer',
	'glx-3.so' => '3D layer',
    );
    my $comment = $load_modules_comment{$module};
    push @{$raw_Module->{Load}}, { val => $module,
				   comment_on_line => $comment && " # $comment",
				 } if !member($module, $raw_X->get_modules);
}
sub add_disable_module {
    my ($raw_X, $module) = @_;
    my $raw_Module = $raw_X->get_Section('Module') || $raw_X->add_Section('Module', {});

    push @{$raw_Module->{Disable}}, { val => $module } if !member($module, $raw_X->get_disabled_modules);
}
sub remove_load_module {
    my ($raw_X, $module) = @_;
    my $raw_Module = $raw_X->get_Section('Module') or return;
    if (my @l = grep { $_->{val} ne $module } @{$raw_Module->{Load}}) {
	$raw_Module->{Load} = \@l;
    } else {
	delete $raw_Module->{Load};
    }
}
sub remove_disable_module {
    my ($raw_X, $module) = @_;
    my $raw_Module = $raw_X->get_Section('Module') or return;
    if (my @l = grep { $_->{val} ne $module } @{$raw_Module->{Disable}}) {
	$raw_Module->{Disable} = \@l;
    } else {
	delete $raw_Module->{Disable};
    }
}
sub set_load_module {
    my ($raw_X, $module, $bool) = @_;
    if ($bool) { 
	remove_disable_module($raw_X, $module);
	add_load_module($raw_X, $module);
    } else {
	remove_load_module($raw_X, $module);
	add_disable_module($raw_X, $module);
    }
}


################################################################################
# modules ######################################################################
################################################################################
sub remove_extension {
    my ($raw_X, $extension) = @_;
    my $raw = $raw_X->get_Section('Extensions') or return;
    delete $raw->{$extension};
    %$raw or $raw_X->remove_Section('Extensions');
}
sub get_extension {
    my ($raw_X, $extension) = @_;
    my $raw = $raw_X->get_Section('Extensions');
    $raw && $raw->{$extension} && $raw->{$extension}{val};
}
sub set_extension {
    my ($raw_X, $extension, $val) = @_;
    my $raw = $raw_X->get_Section('Extensions') || $raw_X->add_Section('Extensions', {});
    $raw->{$extension} = { 'Option' => 1, val => $val };
}

################################################################################
# ModulePath ###################################################################
################################################################################
sub get_ModulePaths {
    my ($raw_X) = @_;
    my $raw_Files = $raw_X->get_Section('Files') or return;
    my $Files = raw_export_section($raw_Files, ['ModulePath']);
    @{$Files->{ModulePath} || []};
}
sub add_ModulePath {
    my ($raw_X, $ModulePath) = @_;
    my $raw_Files = $raw_X->get_Section('Files') || $raw_X->add_Section('Files', {});

    push @{$raw_Files->{ModulePath}}, { val => $ModulePath } if !member($ModulePath, $raw_X->get_ModulePaths);
}
sub remove_ModulePath {
    my ($raw_X, $ModulePath) = @_;
    my $raw_Files = $raw_X->get_Section('Files') or return;
    my @l = grep { $_->{val} ne $ModulePath && $_->{val} ne "$ModulePath/" } @{$raw_Files->{ModulePath}};
    $raw_Files->{ModulePath} = \@l;
}

#-##############################################################################
#- helpers
#-##############################################################################
sub _set_Option {
    my ($category, $node, @names) = @_;
    
    if (member($category, 'keyboard', 'mouse')) {
	#- everything we export is an Option
	$_->{Option} = 1 foreach map { deref_array($node->{$_}) } @names;
    }
}

sub get_InputDevices {
    my ($raw_X, $Driver) = @_;
    $raw_X->get_Sections('InputDevice', sub { val($_[0]{Driver}) eq $Driver });
}
sub remove_InputDevices {    
    my ($raw_X, $Driver) = @_;
    $raw_X->remove_InputDevices_when(sub { val($_[0]{Driver}) eq $Driver });
}
sub remove_InputDevices_when {    
    my ($raw_X, $when) = @_;
    my @removed = $raw_X->remove_Section('InputDevice', $when);

    my $Identifier_regexp = join('|', map { val($_->{l}{Identifier}) } @removed);
    my $layout = get_ServerLayout($raw_X)->{InputDevice} ||= [];
    @$layout = grep { $_->{val} !~ /^"$Identifier_regexp"/ } @$layout;
}

sub get_ServerLayout {
    my ($raw_X) = @_;
    $raw_X->get_Section('ServerLayout') ||
      $raw_X->add_Section('ServerLayout', { Identifier => { val => 'layout1' } });
}

#-##############################################################################
#- helpers
#-##############################################################################
sub raw_export_section {
    my ($section, $fields) = @_;

    my $export_name = sub {
	my ($name) = @_;
	my $h = $section->{$name} or return;

	my @l = map { if_(!$_->{commented}, $_->{val}) } deref_array($h) or return;    
	$name => (ref($h) eq 'ARRAY' ? \@l : $l[0]);
    };

    my %h = map { $export_name->($_) } @$fields;
    \%h;
}

sub raw_import_section {
    my ($section, $h, $o_fields) = @_;
    foreach ($o_fields ? grep { exists $h->{$_} } @$o_fields : sort keys %$h) {
	my @l = map { ref($_) eq 'HASH' ? $_ : { val => $_ } } deref_array($h->{$_});
	$section->{$_} = (ref($h->{$_}) eq 'ARRAY' ? \@l : $l[0]);
    }
}

sub add_Section {
    my ($raw_X, $Section, $h) = @_;
    my @suggested_ordering = qw(Extensions Files ServerFlags Module DRI Keyboard Pointer XInput InputDevice Monitor Device Screen ServerLayout);
    my %order = map_index { { lc($_) => $::i } } @suggested_ordering;
    my $e = { name => $Section, l => $h };
    my $added;
    my $raw = $raw_X->{raw};
    @$raw = map { 
	if ($order{lc $_->{name}} > $order{lc $Section} && !$added) {
	    $added = 1;
	    ($e, $_);
	} else { $_ }
    } @$raw;
    push @$raw, $e if !$added;
    $h;
}
sub remove_Section {
    my ($raw_X, $Section, $o_when) = @_;
    my $raw = $raw_X->{raw};
    my ($keep, $remove) = partition { $_->{name} ne $Section || $o_when && !$o_when->($_->{l}) } @$raw;
    @$raw = @$keep;
    @$remove;
}
sub get_Sections {
    my ($raw_X, $Section, $o_when) = @_;
    map { if_(lc($_->{name}) eq lc($Section) && (!$o_when || $o_when->($_->{l})), $_->{l}) } @{$raw_X->{raw}};
}
sub get_Section {
    my ($raw_X, $Section, $o_when) = @_;
    my @l = get_Sections($raw_X, $Section, $o_when);
    @l > 1 and log::l("Xconfig: found more than one Section $Section");
    $l[0];
}
sub get_Section_by_Identifier {
    my ($raw_X, $Section, $Identifier) = @_;
    my @l = get_Sections($raw_X, $Section, sub { val($_[0]{Identifier}) eq $Identifier });
    @l > 1 and die "more than one Section $Section has Identifier $Identifier";
    $l[0];
}

sub val {
    my ($ref) = @_;
    $ref && $ref->{val};
}


sub ModeLine_from_string {
    my ($s) = @_;
    my $raw_X_for_ModeLine = Xconfig::parse::read_XF86Config_from_string($s);
    get_Section(Xconfig::xfree->new($raw_X_for_ModeLine), 'Monitor')->{ModeLine};
}



# http://home.comcast.net/~igpl/Aspect.html
# movies http://www.technosound.co.uk/nav.php?pageid=hcg_widescreen
# esp for 1360x768 http://www.winischhofer.at/linuxsispart1.shtml

# www.dell.com/downloads/global/vectors/2003_cvt.pdf
# file vesamodes in Xorg is DMT Standard Display Modes

# http://www.vesa.org/Public
# http://www.vesa.org/Public/EEDIDguideV1.pdf 

#- http://www.vesa.org/Public/CVT
our @CVT_ratios = qw(4/3 16/9 16/10 5/4 15/9 3/2);
our @CVT_vfreqs = qw(50 60 75 85); # and also 60Hz "reduced blanking" in CVT

our @vfreqs = (@CVT_vfreqs, qw(100 120));

our %ratio2resolutions = (

    # first all the CVT_ratios

    # 1.25
    '5/4' => [ '640x512',
	       '720x576',
	       '1280x1024', # SXGA
	       '1800x1440',
	       #'2560x2048', # QSXGA
	       #'5120x4096', # HSXGA
	   ],

    # 1.33
    '4/3' => [ '320x240', # QVGA
	       '480x360',
	       '640x480', # VGA
	       #'768x576', # PAL
	       '800x600', # SVGA
	       '832x624',
	       '1024x768', # XGA
	       '1152x864',
	       '1280x960',
	       '1400x1050', # SXGA+
	       '1600x1200', # UXGA
	       #'1792x1344',
	       #'1800x1350',
	       #'1856x1392',
	       '1920x1440',
	       '2048x1536', # QXGA
	       '2800x2100', # QSXGA+
	       '3200x2400', # QUXGA
	       '4096x3072', # HXGA
	       '6400x4800', # HUXGA
	       # DBLSCAN: 400x300 416x312 512x384 576x432 700x525 896x672 928x696 960x720
    ],

    # 1.5
    '3/2' => [ '360x240',
	       '720x480', # NTSC 
	       '1152x768',
	       #'1280x854',
	       #'1440x960',
	   ], # 576x384 (DBLSCAN of 1152x768)

    # 1.6
    '16/10' => [ #'320x200', # CGA
		 #'640x400',
		 #'960x600',
		 '1280x800', 
		 '1440x900',
		 '1600x1000',
		 '1680x1050', # WSXGA+
		 '1920x1200', # WUXGA
		 '2560x1600', # WQXGA
		 '3840x2400', # WQUXGA
		 '5120x3200', # WHXGA
		 '7680x4800', # WHUXGA
	     ],

    # 1.67
    '15/9' => [ '800x480',
		'1280x768', # WXGA ?? should be 1366x768 ??
	    ],
    
    # 1.78
    '16/9' => [ #'854x480', # WVGA
	        #'960x540',
		#'1024x576',
		'1280x720', # HD 720		
		'1360x765', # one kind of WXGA (rounded down)
		'1366x768', # HDTV
		'1600x900', # WSXGA?
		'1920x1080', # HD 1080
		'7680x4320', # UHDTV
	    ],

    # now more weird things

    # 1.32
    # '192/145' => [ '1152x870' ],

    # 1.328
    # '85/64' => [ '1360x1024' ],

    # 1.42
    # '17/12' => [ '544x384' ] ,

    # 1.56
    #'25/16' => [ '1600x1024', # WSXGA
    #		 '3200x2048', # WQSXGA
    #		 '6400x4096', # WHSXGA
    #	     ], # (DBLSCAN 800x512)

    # 1.767
    # '53/30' => [ '848x480' ],

    # 1.775
    # '71/40' => [ '852x480' ],

    # 1.783
    # '107/60' => [ '856x480' ],

    N_("_:weird aspect ratio\nother") => [

	# 1.707 = 128/75
	'1024x600',

	# 1.771 = 85/48
	'1360x768',

	# 2.13 = 32/15
	'1024x480', '1280x600', # VAIO

	# 2.67 = 8/3
	'2048x768', '2560x960', '3200x1200',

	# 4.0 = 4/1
	'3072x768', '3456x864', '3840x960', '4800x1200',

	# ?? 352x288 640x350 (DBLSCAN 320x175) 720x400 (DBLSCAN 360x200)
    ],
);

our %resolution2ratio = map_each { map { $_ => $::a } @$::b } %ratio2resolutions;
our @resolutions = map_each { @$::b } %ratio2resolutions;

foreach my $ratio (keys %ratio2resolutions) {
    if ($ratio =~ m!^(\d+)/(\d+)$!) {
	my $eval = $2 / $1;
	foreach (@{$ratio2resolutions{$ratio}}) {
	    my ($x, $y) = /(\d+)x(\d+)/;
	    my $y2 = round($x * $eval);
	    $y == $y2 or do {
		my $good_ratio = (find { m!^(\d+)/(\d+)$! && $y == round($x * $2 / $1) } keys %ratio2resolutions) || '??';
		die "bad ratio $ratio for resolution $_, it should be $good_ratio\n";
	    };
	}
    }
}

our $default_header = <<'END';
# **********************************************************************
# Refer to the xorg.conf man page for details about the format of
# this file.
# **********************************************************************

Section "ServerFlags"
    Option "DontZap" "True" # disable <Ctrl><Alt><BS> (server abort)
    #DontZoom # disable <Ctrl><Alt><KP_+>/<KP_-> (resolution switching)
    AllowMouseOpenFail # allows the server to start up even if the mouse does not work
END

require detect_devices;
$default_header .= <<'END_XBOX' if detect_devices::is_xbox();
    Option "PciProbe1" "false"
    Option "PciProbe2" "false"
    Option "PciForceConfig1" "false"
    Option "PciForceConfig2" "false"
    Option "PciOsConfig" "true"
END_XBOX

$default_header .= <<'END';
EndSection
END

our $default_ModeLine = arch() =~ /ppc/ ? <<'END_PPC' : <<'END';
    # Apple iMac modes
    ModeLine "1024x768"   78.525 1024 1049 1145 1312   768  769  772  800 +hsync +vsync
    ModeLine "800x600"    62.357  800  821  901 1040   600  601  604  632 +hsync +vsync
    ModeLine "640x480"    49.886  640  661  725  832   480  481  484  514 +hsync +vsync
    # Apple monitors tend to do 832x624
    ModeLine "832x624"    57      832  876  940 1152   624  625  628  667 -hsync -vsync
    # Apple PowerBook G3
    ModeLine "800x600"    100     800  816  824  840   600  616  624  640 -hsync -vsync
    # Apple TI Powerbook 
    ModeLine "1152x768"   78.741 1152 1173 1269 1440   768  769  772  800 +vsync +vsync
    # Pismo Firewire G3   
    ModeLine "1024x768"   65     1024 1032 1176 1344   768  771  777  806 -hsync -vsync
    # iBook2
    ModeLine "1024x768"   65     1024 1048 1184 1344   768  771  777  806 -hsync -vsync
    # 17" Apple Studio Display
    ModeLine "1024x768"   112.62 1024 1076 1248 1420 768 768 780 808 +hsync +vsync
    # HiRes Apple Studio Display
    ModeLine "1280x1024"  135    1280 1288 1392 1664  1024 1027 1030 1064
    # Another variation
    ModeLine "1280x1024"  134.989 1280 1317 1429 1688  1024 1025 1028 1066 +hsync +vsync
END_PPC
    # TV fullscreen mode or DVD fullscreen output.
    # 768x576 @ 79 Hz, 50 kHz hsync
    ModeLine "768x576"     50.00  768  832  846 1000   576  590  595  630
    # 768x576 @ 100 Hz, 61.6 kHz hsync
    ModeLine "768x576"     63.07  768  800  960 1024   576  578  590  616
END

1;