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=head1 NAME |
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|
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Mozilla::Plugin - embed perl into mozilla/netscape. |
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|
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=head1 SYNOPSIS |
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|
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use Mozilla::Plugin; |
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|
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=head1 DESCRIPTION |
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|
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sorry... |
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|
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=over 4 |
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|
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=cut |
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|
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package Mozilla::Plugin; |
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|
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use base Exporter; |
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use Storable; |
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#use XSLoader; |
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|
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$VERSION = 0.01; |
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@EXPORT = qw(); |
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|
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#XSLoader::load __PACKAGE__, $VERSION; |
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use Data::Dumper;#d# |
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|
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my $interface; # Mozilla::Plugin::xxx (design weakness) |
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|
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my $data; |
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|
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sub BIAS() { -2000000000 } # ugliest hack ever seen |
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|
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sub snd_cmd($) { |
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$data = pack "NN", 0, ord($_[0]); |
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} |
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|
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sub snd_ptr($) { |
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$data .= $_[0]; |
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} |
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|
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sub snd_u32($) { |
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$data .= pack "N", $_[0]; |
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} |
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|
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sub snd_i32($) { |
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$data .= pack "N", $_[0] - BIAS; |
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} |
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|
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sub snd_blk($) { |
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$data .= pack "NA*", length($_[0]), $_[0]; |
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} |
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|
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sub snd_snd() { |
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substr ($data, 0, 4) = pack "N", length $data; |
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length ($data) == syswrite FD, $data; |
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} |
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|
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sub snd_dyn($) { |
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length ($_[0]) == syswrite FD, $_[0]; |
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} |
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|
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sub rcv_cmd() { |
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my $buf; |
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4 == sysread FD, $buf, 4 or exit; |
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my $len = unpack "N", $buf; |
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$len -= 4; |
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$len == sysread FD, $buf, $len or die; |
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|
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$data = substr $buf, 4; |
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|
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substr $buf, 3, 1; |
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} |
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|
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sub rcv_ptr() { |
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my $ptr = substr $data, 0, 8; |
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$data = substr $data, 8; |
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$ptr; |
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} |
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|
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sub rcv_u32() { |
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my $u32 = unpack "N", $data; |
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$data = substr $data, 4; |
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$u32; |
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} |
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|
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sub rcv_i32() { |
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my $i32 = BIAS + unpack "N", $data; |
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$data = substr $data, 4; |
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$i32; |
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} |
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|
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sub rcv_blk() { |
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my $len = unpack "N", $data; |
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my $str = substr $data, 4, $len; |
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$data = substr $data, 4 + $len; |
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$str; |
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} |
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|
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=item my $fh = server_fh |
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|
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The design of this module is event-based. When the plug-in starts (there |
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is always just one interpreter) it spawns one perl interpreter which |
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will immediately go into a even loop. If you want to use your own event |
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loop (e.g. using the Gtk or Event modules) you need to register a file |
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input handler on the filehandle returned by C<server_fh> that calls |
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C<server_event> whenever there is input pending on C<server_fh>. This will |
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ensure proper operation of the plug-in. |
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|
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=item server_event |
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|
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Call this function whenever there is data available on the C<server_fh>. This function |
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might not return. |
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|
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Due to this design (flaw?), sharing of different toolkits using this |
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plug-in is difficult at best. Spawning a new perl interpreter for every |
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plug-in is also not very viable, so in the future one might be able to |
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specify a group on the embed statement (i.e. EMBED GROUP="gtk+"). |
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|
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=cut |
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|
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sub server_fh() { \*FD } |
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|
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sub server_event() { |
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my $cmd = rcv_cmd; |
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|
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warn "cmd<$cmd>\n";#d# |
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|
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if ($cmd eq "I") { |
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rcv_u32 == 1 or die "protocol version mismatch\n"; |
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($IFACE, $OSNAME, $OSVERS) = (rcv_blk, rcv_blk, rcv_blk); |
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|
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} elsif ($cmd eq "+") { |
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my ($objid, $type, $mode, $save, $argc) |
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= (rcv_ptr, rcv_blk, rcv_u32, rcv_blk, rcv_u32); |
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my %args; |
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while ($argc--) { |
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my ($argn, $argv) = (rcv_blk, rcv_blk); |
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$args{$argn} = $argv; |
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} |
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|
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warn "new obj $objid\n";#d# |
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$_OBJ{$objid} = $interface->new( |
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objid => $objid, |
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type => $type, |
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mode => $mode, |
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save => $save, |
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args => \%args, |
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); |
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|
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} elsif ($cmd eq "-") { |
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my $objid = rcv_ptr; |
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my $save = (delete $_OBJ{$objid})->save; |
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snd_cmd "-"; |
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snd_u32 length $save; |
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snd_snd and snd_dyn $save; |
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|
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} elsif ($cmd eq "W") { |
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my $objid = rcv_ptr; |
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my %args = ( |
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window => rcv_ptr, |
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x => rcv_i32, |
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y => rcv_i32, |
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w => rcv_i32, |
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h => rcv_i32, |
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); |
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if ($IFACE eq "UNIX") { |
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$args{window} = unpack "xxxxN", $args{window}; |
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$args{ws_type} = rcv_i32; |
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$args{ws_depth} = rcv_u32; |
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} |
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|
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$_OBJ{$objid}->set_window(\%args); |
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|
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} else { |
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die "unknown command '$cmd' received"; |
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} |
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} |
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|
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sub mainloop { |
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server_event while 1; |
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} |
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|
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sub init { |
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$interface = shift; |
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|
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open FD, "+<&=$_[0]"; binmode FD; |
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|
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$interface->mainloop; |
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} |
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|
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sub new { |
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my $class = shift; |
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my $self = bless { @_ }, $class; |
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$self->{save} = $self->{save} ne "" |
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? Storable::thaw $self->{save} |
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: {}; |
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warn "new: ".Dumper($self); |
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$self; |
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} |
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|
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sub set_window { |
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my $self = shift; |
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my $new = shift; |
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print "window set calling with $new->{window}, $new->{w}, $new->{h} ($self->{window}\n";#d# |
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if ($self->{window}) { |
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if ($self->{window}{window} ne $new->{window}) { |
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$self->window_delete($self->{window}); |
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} elsif ($self->{window}{w} != $new->{w} |
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or $self->{window}{h} != $new->{h}) { |
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$self->window_resize($new->{window}, $new->{w}, $new->{h}); |
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} |
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$self->{window} = $new; |
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} |
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|
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unless ($self->{window}) { |
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$self->{window} = $new; |
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print "window new calling with $new->{window}, $new->{w}, $new->{h}\n";#d# |
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$self->window_new($new->{window}, $new->{w}, $new->{h}); |
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} |
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warn "set_window: ".Dumper($self); |
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} |
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|
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sub window_new {} |
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sub window_resize {} |
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|
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sub window_delete { |
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my $self = shift; |
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delete $self->{window}; |
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} |
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|
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sub save { |
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my $self = shift; |
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$self->set_window(undef); |
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Storable::nfreeze $self->{save}; |
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} |
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|
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sub DESTROY { |
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warn "DESTROY"; |
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} |
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|
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1; |
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|
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=back |
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|
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=head1 BUGS |
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|
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=head1 SEE ALSO |
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|
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L<PApp>. |
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|
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=head1 AUTHOR |
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|
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Marc Lehmann <pcg@goof.com> |
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http://www.goof.com/pcg/marc/ |
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|
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=cut |
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|
