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package Xconfig::parse; # $Id: parse.pm 247269 2008-10-01 13:57:30Z pixel $
use diagnostics;
use strict;
use lib qw(/usr/lib/libDrakX); # for perl_checker
use common;
# perl_checker: require MDK::Common
sub read_XF86Config {
my ($file) = @_;
my $raw = _rraw_from_file($file);
_from_rraw(@$raw);
$raw;
}
sub prepare_write_XF86Config {
my ($raw) = @_;
map { _raw_to_string(_before_to_string({ %$_ }, 0)) } @$raw;
}
sub write_XF86Config {
my ($raw, $file) = @_;
my @blocks = prepare_write_XF86Config($raw);
@blocks ? output($file, @blocks) : unlink $file;
}
sub read_XF86Config_from_string {
my ($s) = @_;
my $raw = _rraw_from_file('-', [ split "\n", $s ]);
_from_rraw(@$raw);
$raw;
}
#-###############################################################################
#- raw reading/saving
#-###############################################################################
sub _rraw_from_file {
my ($file, $o_lines) = @_;
my $rraw = [];
my $lines = $o_lines || [ cat_($file) ];
my $line;
my ($comment, $obj, @objs);
my $attach_comment = sub {
$obj || @objs or warn "$file:$line: can not attach comment\n";
if ($comment) {
$comment =~ s/\n+$/\n/;
($obj || $objs[0])->{$_[0] . '_comment'} = $comment;
$comment = '';
}
};
foreach (@$lines) {
$line++;
s/^\s*//; s/\s*$//;
if (/^$/) {
$comment .= "\n" if $comment;
next;
} elsif (@objs ? m/^#\W/ || /^#$/ : /^#/) {
s/^#\s+/# /;
$comment .= "$_\n";
next;
}
if (/^Section\s+"(.*)"/i) {
die "$file:$line: missing EndSection\n" if @objs;
my $e = { name => $1, l => [], kind => 'Section' };
push @$rraw, $e;
unshift @objs, $e; $obj = '';
$attach_comment->('pre');
} elsif (/^Subsection\s+"(.*)"/i) {
die "$file:$line: missing EndSubsection\n" if @objs && $objs[0]{kind} eq 'Subsection';
die "$file:$line: not in Section\n" if !@objs || $objs[0]{kind} ne 'Section';
my $e = { name => $1, l => [], kind => 'Subsection' };
push @{$objs[0]{l}}, $e;
unshift @objs, $e; $obj = '';
$attach_comment->('pre');
} elsif (/^EndSection/i) {
die "$file:$line: not in Section\n" if !@objs || $objs[0]{kind} ne 'Section';
$attach_comment->('post');
shift @objs; $obj = '';
} elsif (/^EndSubsection/i) {
die "$file:$line: not in Subsection\n" if !@objs || $objs[0]{kind} ne 'Subsection';
$attach_comment->('post');
shift @objs; $obj = '';
} else {
die "$file:$line: not in Section\n" if !@objs;
my $commented = s/^#//;
my $comment_on_line;
s/(\s*#.*)/$comment_on_line = $1; ''/e;
if (/^$/) {
die "$file:$line: weird";
}
(my $name, my $Option, $_) =
/^Option\s*"(.*?)"(.*)/ ? ($1, 1, $2) : /^(\S+)(.*)/ ? ($1, 0, $2) : internal_error($_);
my ($val) = /(\S.*)/;
my %e = (Option => $Option, commented => $commented, comment_on_line => $comment_on_line, pre_comment => $comment);
$comment = '';
$obj = { name => $name, val => $val };
$e{$_} and $obj->{$_} = $e{$_} foreach keys %e;
push @{$objs[0]{l}}, $obj;
}
}
$rraw;
}
sub _simple_val_to_string {
my ($name, $e) = @_;
my $key = $e->{Option} ? qq(Option "$name") : $name;
my $val = defined $e->{val} ? ($e->{Option} && $e->{val} !~ /^"/ ? qq( "$e->{val}") : qq( $e->{val})) : '';
($e->{commented} ? '#' : '') . $key . $val;
}
sub _raw_to_string {
my ($e, $b_want_spacing) = @_;
my $s = do {
if ($e->{l}) {
my $inside = join('', map_index { _raw_to_string($_, $::i) } @{$e->{l}});
$inside .= $e->{post_comment} || '';
$inside =~ s/^/ /mg;
qq(\n$e->{kind} "$e->{name}"\n) . $inside . "End$e->{kind}";
} else {
_simple_val_to_string($e->{name}, $e);
}
};
($e->{pre_comment} ? ($b_want_spacing ? "\n" : '') . $e->{pre_comment} : '') . $s . ($e->{comment_on_line} || '') . "\n" . (!$e->{l} && $e->{post_comment} || '');
}
#-###############################################################################
#- refine the data structure for easier use
#-###############################################################################
my %kind_names = (
Pointer => [ qw(Protocol Device Emulate3Buttons Emulate3Timeout EmulateWheel EmulateWheelButton) ],
Mouse => [ qw(DeviceName Protocol Device AlwaysCore Emulate3Buttons Emulate3Timeout EmulateWheel EmulateWheelButton) ], # Subsection in XInput
Keyboard => [ qw(Protocol Driver XkbModel XkbLayout XkbVariant XkbDisable) ],
Monitor => [ qw(Identifier VendorName ModelName HorizSync VertRefresh PreferredMode) ],
Device => [ qw(Identifier VendorName BoardName Chipset Driver VideoRam Screen BusID DPMS power_saver AccelMethod MonitorLayout TwinViewOrientation BIOSHotkeys RenderAccel SWCursor XaaNoOffscreenPixmaps) ],
Display => [ qw(Depth Modes Virtual) ], # Subsection in Device
Screen => [ qw(Identifier Driver Device Monitor DefaultDepth DefaultColorDepth) ],
Extensions => [ qw(Composite) ],
InputDevice => [ qw(Identifier Driver Protocol Device Type Mode XkbModel XkbLayout XkbVariant XkbDisable Emulate3Buttons Emulate3Timeout EmulateWheel EmulateWheelButton) ],
WacomCursor => [ qw(Port) ], #-\
WacomStylus => [ qw(Port) ], #--> Port must be first
WacomEraser => [ qw(Port) ], #-/
ServerLayout => [ qw(Identifier) ],
);
my @want_string = qw(Identifier DeviceName VendorName ModelName BoardName Driver Device Chipset Monitor Protocol XkbModel XkbLayout XkbVariant XkbOptions XkbCompat Load Disable ModulePath BusID PreferredMode);
%kind_names = map_each { lc $::a => [ map { lc } @$::b ] } %kind_names;
@want_string = map { lc } @want_string;
sub _from_rraw {
sub _from_rraw__rec {
my ($current, $e) = @_;
if ($e->{l}) {
_from_rraw($e);
push @{$current->{l}{$e->{name}}}, $e;
} else {
if (member(lc $e->{name}, @want_string) || $e->{Option} && $e->{val}) {
$e->{val} =~ s/^"(.*)"$/$1/ or warn "$e->{name} $e->{val} has no quote\n";
}
if (member(lc $e->{name}, @{$kind_names{lc $current->{name}} || []})) {
if ($current->{l}{$e->{name}} && !$current->{l}{$e->{name}}{commented}) {
warn "skipping conflicting line for $e->{name} in $current->{name}\n" if !$e->{commented};
} else {
$current->{l}{$e->{name}} = $e;
}
} else {
push @{$current->{l}{$e->{name}}}, $e;
}
}
delete $e->{name};
}
foreach my $e (@_) {
($e->{l}, my $l) = ({}, $e->{l});
_from_rraw__rec($e, $_) foreach @$l;
delete $e->{kind};
}
}
sub _before_to_string {
my ($e, $depth) = @_;
if ($e->{l}) {
$e->{kind} = $depth ? 'Subsection' : 'Section';
my %rated = map_index { $_ => $::i + 1 } @{$kind_names{lc $e->{name}} || []};
my @sorted = sort { ($rated{lc $a} || 99) <=> ($rated{lc $b} || 99) } keys %{$e->{l}};
$e->{l} = [ map {
my $name = $_;
map {
_before_to_string({ name => $name, %$_ }, $depth+1);
} deref_array($e->{l}{$name});
} @sorted ];
} elsif (member(lc $e->{name}, @want_string)) {
$e->{val} = qq("$e->{val}");
}
$e;
}
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