=head1 NAME

Crossfire::MapWidget - Gtk2 widget displaying cf maps

=head1 SYNOPSIS

  use Crossfire::MapWidget;

=head1 DESCRIPTION

=head2 METHODS

=over 4

=cut

package Crossfire::MapWidget;

use strict;

use Gtk2;

use Crossfire;
use Crossfire::Tilecache;

use Glib::Object::Subclass
   'Gtk2::DrawingArea';

use List::Util qw(min max);

sub INIT_INSTANCE {
   my ($self) = @_;

   $self->signal_connect (destroy => sub { %{$_[0]} = () });
   $self->signal_connect (realize => sub {
      my ($self) = @_;

      $self->{window} = $self->window;

      1
   });

   $self->set_redraw_on_allocate (0); # nope
   $self->double_buffered (0);

   $self->signal_connect (size_request => sub {
      $_[1]->width  (20 * TILESIZE);
      $_[1]->height (20 * TILESIZE);

      1
   });

   $self->signal_connect (expose_event => sub { $self->expose ($_[1]); 1 });

   $self->signal_connect_after (configure_event => sub {
      $self->set_viewport ($self->{x}, $self->{y});

      0
   });

   # reduces unnecessary redraws
   $self->signal_connect_after (focus_in_event  => sub { 1 });
   $self->signal_connect_after (focus_out_event => sub { 1 });

   $self->{tooltip} = -1; # initially disabled

   $self->signal_connect_after (enter_notify_event => sub { $self->enable_tooltip;  0 });
   $self->signal_connect_after (leave_notify_event => sub { $self->disable_tooltip; 0 });

   $self->signal_connect (button_press_event => sub {
      my ($self, $event) = @_;

      my ($x, $y) = ($event->x, $event->y);

      if ($_[1]->button == 2 && !$self->{in_drag}) {
         $self->disable_tooltip;

         $_[0]->grab_focus;
         $self->{in_drag} = [$self->{x}, $self->{y}, $x, $y];
         return 1;
      }

      0
   });

   $self->signal_connect (motion_notify_event => sub {
      my ($self) = @_;

      $self->update_tooltip;

      if (my $di = $self->{in_drag}) {
         my ($x, $y) = $self->get_pointer;

         $self->set_viewport (
            $di->[0] + $di->[2] - $x,
            $di->[1] + $di->[3] - $y,
         );

         return 1;
      }

      0
   });

   $self->signal_connect (button_release_event => sub {
      my ($self) = @_;

      $self->enable_tooltip 
         if delete $self->{in_drag};

      0
   });

   # gtk+ supports no motion compression, a major lacking feature. we have to pay for the
   # workaround with incorrect behaviour and extra server-turnarounds.
   $self->add_events ([qw(key_press_mask key_release_mask
                          button_press_mask button_release_mask button-motion-mask
                          pointer-motion-mask pointer-motion-hint-mask
                          enter-notify-mask leave-notify-mask)]);
   $self->can_focus (1);

#   $self->signal_connect (key_press_event => sub { $self->handle_key ($_[1]->keyval, $_[1]->state) });
}

sub enable_tooltip {
   my ($self) = @_;

   $self->{tooltip}++;
   $self->update_tooltip;
}

sub disable_tooltip {
   my ($self) = @_;

   $self->{tooltip}--;
   $self->update_tooltip;
}

sub overlay {
   my ($self, $name, $x, $y, $w, $h, $cb) = @_;

   if (my $ov = delete $self->{overlay}{$name}) {
      my ($x, $y, $w, $h) = @$ov;

      $self->queue_draw_area ($x - $self->{x}, $y - $self->{y}, $w, $h);
   }

   if ($h) {
      $self->{overlay}{$name} = [$x, $y, $w, $h, $cb];

      $self->queue_draw_area ($x - $self->{x}, $y - $self->{y}, $w, $h);
   }
}

sub update_tooltip {
   my ($self) = @_;

   if ($self->{tooltip} >= 0) {
      my $screen = $self->{window}->get_screen;
      my ($pscreen, $x, $y) = $screen->get_display->get_pointer;

      if ($pscreen == $screen) {
         if (!$self->{tip}) {
            $self->{tip} = new Gtk2::Window "popup";
            $self->{tip}->can_focus (0);
            $self->{tip}->set_name ("gtk-tooltips");
            $self->{tip}->set_decorated (0);
            $self->{tip}->set_border_width (4);
            $self->{tip}->set_has_frame (0);
            $self->{tip}->set_resizable (0);
         }

         my ($mx, $my) = $self->coord ($self->get_pointer);

         if ($self->{tipinfo}[0] != $mx || $self->{tipinfo}[1] != $my) {
            $self->fill_tooltip ($mx, $my);

            $self->{tipinfo} = [$mx, $my];

            $self->overlay (_tooltip => $mx * TILESIZE, $my * TILESIZE, TILESIZE, TILESIZE, sub {
               my ($self, $x, $y) = @_;

               $self->{window}->draw_rectangle ($_ & 1 ? $self->style->black_gc : $self->style->white_gc, 0,
                                                $x + $_, $y + $_,
                                                TILESIZE - 1 - $_ * 2, TILESIZE - 1 - $_ * 2)
                  for 0..3;

               my $req = $self->{tip}->size_request;
               $self->{tip}->resize ($req->width, $req->height);
            });

            $self->{tip}->show_all;
         }

         $self->{tip}->move ($x + TILESIZE, $y);

         return;
      }
   }

   $self->overlay ("_tooltip");
   delete $self->{tipinfo};
   (delete $self->{tip})->destroy if $self->{tip};
}

sub fill_tooltip {
   my ($self, $x, $y) = @_;

   $self->{tip}->remove ($self->{tip}->get_children)
      if $self->{tip}->get_children;

   $self->{tip}->add (my $frame = new Gtk2::Frame "($x|$y)");

   $frame->set_shadow_type ("none");

   if ($x < 0 || $x >= $self->{map}{width}
       || $y < 0 || $y >= $self->{map}{height}) {
     $frame->add (new Gtk2::Label "<off-map>");
   } else {
      $frame->add (my $vbox = new Gtk2::VBox 1, 2);

      #TODO: fill tooltip via signal, defaulting to this:

      # fill tooltip with info about $x, $y
      my $as = $self->{map}{map}[$x][$y] || [];
      for my $a (@$as) {
         $vbox->add (my $label = new Gtk2::Label $a->{_name});
         $label->set_alignment (0, 0.5);
      }
   }
}

sub set_viewport {
   my ($self, $x, $y) = @_;

   my $area = $self->allocation;

   $x = max 0, min $self->{width}  - $area->width , $x;
   $y = max 0, min $self->{height} - $area->height, $y;

   $self->window->scroll ($self->{x} - $x, $self->{y} - $y);

   ($self->{x}, $self->{y}) = ($x, $y);
}

sub set_map {
   my ($self, $map) = @_;

   $self->{map} = $map;

   $self->{width}  = $map->{width}  * TILESIZE;
   $self->{height} = $map->{height} * TILESIZE;
   
   $self->{x} =
   $self->{y} = 0;

   delete $self->{face};
   $self->update_map (0, 0, $self->{width}, $self->{height});
   delete $self->{tipinfo};
   $self->update_tooltip;
   $self->invalidate_all;
}

sub coord {
   my ($self, $x, $y) = @_;

   (
      int +($self->{x} + $x) / TILESIZE,
      int +($self->{y} + $y) / TILESIZE,
   )
}

#sub handle_key {
#   my ($self, $key, $state) = @_;
#
#   $self->prefetch_cancel;
#
#   if ($state * "control-mask") {
#      if ($key == $Gtk2::Gdk::Keysyms{g}) {
#         my @sel = keys %{$self->{sel}};
#         $self->generate_thumbnails (@sel ? @sel : 0 .. $#{$self->{entry}});
#      } elsif ($key == $Gtk2::Gdk::Keysyms{a}) {
#         $self->select_all;
#      } elsif ($key == $Gtk2::Gdk::Keysyms{A}) {
#         $self->select_range ($self->{offs}, $self->{offs} + $self->{cols} * $self->{page} - 1);
#      } elsif ($key == $Gtk2::Gdk::Keysyms{s}) {
#         $self->rescan;
#      } elsif ($key == $Gtk2::Gdk::Keysyms{d}) {
#         $self->unlink (keys %{$self->{sel}});
#      } elsif ($key == $Gtk2::Gdk::Keysyms{u}) {
#         my @sel = keys %{$self->{sel}};
#         $self->update_thumbnails (@sel ? @sel : 0 .. $#{$self->{entry}});
#
#      } elsif ($key == $Gtk2::Gdk::Keysyms{Return}) {
#         $self->cursor_move (0) unless $self->cursor_valid;
#         $self->emit_activate ($self->{cursor});
#      } elsif ($key == $Gtk2::Gdk::Keysyms{space}) {
#         $self->cursor_move (1) or return 1
#            if $self->{cursor_current} || !$self->cursor_valid;
#         $self->emit_activate ($self->{cursor}) if $self->cursor_valid;
#         $self->prefetch (1);
#      } elsif ($key == $Gtk2::Gdk::Keysyms{BackSpace}) {
#         $self->cursor_move (-1) or return 1;
#         $self->emit_activate ($self->{cursor}) if $self->cursor_valid;
#         $self->prefetch (-1);
#
#      } else {
#         return 0;
#      }
#   } else {
#      if ($key == $Gtk2::Gdk::Keysyms{Page_Up}) {
#         my $value = $self->{adj}->value;
#         $self->{adj}->set_value ($value >= $self->{page} ? $value - $self->{page} : 0);
#         $self->clear_cursor;
#      } elsif ($key == $Gtk2::Gdk::Keysyms{Page_Down}) {
#         my $value = $self->{adj}->value + $self->{page};
#         $self->{adj}->set_value ($value <= $self->{maxrow} ? $value : $self->{maxrow});
#         $self->clear_cursor;
#
#      } elsif ($key == $Gtk2::Gdk::Keysyms{Home}) {
#         $self->{adj}->set_value (0);
#         $self->clear_cursor;
#      } elsif ($key == $Gtk2::Gdk::Keysyms{End}) {
#         $self->{adj}->set_value ($self->{maxrow});
#         $self->clear_cursor;
#
#      } elsif ($key == $Gtk2::Gdk::Keysyms{Up}) {
#         $self->cursor_move (-$self->{cols});
#      } elsif ($key == $Gtk2::Gdk::Keysyms{Down}) {
#         $self->cursor_move (+$self->{cols});
#      } elsif ($key == $Gtk2::Gdk::Keysyms{Left}) {
#         $self->cursor_move (-1);
#      } elsif ($key == $Gtk2::Gdk::Keysyms{Right}) {
#         $self->cursor_move (+1);
#
#      } elsif ($key == $Gtk2::Gdk::Keysyms{Return}) {
#         $self->cursor_move (0) unless $self->cursor_valid;
#         $self->emit_activate ($self->{cursor});
#      } elsif ($key == $Gtk2::Gdk::Keysyms{space}) {
#         $self->cursor_move (1) or return 1
#            if $self->{cursor_current} || !$self->cursor_valid;
#         $self->emit_activate ($self->{cursor}) if $self->cursor_valid;
#         $self->prefetch (1);
#      } elsif ($key == $Gtk2::Gdk::Keysyms{BackSpace}) {
#         $self->cursor_move (-1) or return 1;
#         $self->emit_activate ($self->{cursor}) if $self->cursor_valid;
#         $self->prefetch (-1);
#
#      } elsif ($key == ord '^') {
#         $self->updir if exists $self->{dir};
#
#      } elsif (($key >= (ord '0') && $key <= (ord '9'))
#               || ($key >= (ord 'a') && $key <= (ord 'z'))) {
#
#         $key = chr $key;
#
#         my ($idx, $cursor) = (0, 0);
#
#         $self->clear_selection;
#
#         for my $entry (@{$self->{entry}}) {
#            $idx++;
#            $cursor = $idx if $key gt lcfirst $entry->[1];
#         }
#
#         if ($cursor < @{$self->{entry}}) {
#            delete $self->{cursor_current};
#            $self->{sel}{$cursor} = $self->{entry}[$cursor];
#            $self->{cursor} = $cursor;
#
#            $self->{adj}->set_value (min $self->{maxrow}, $cursor / $self->{cols});
#            $self->emit_sel_changed;
#            $self->invalidate_all;
#         }
#      } else {
#         return 0;
#      }
#   }
#
#   1
#}

sub invalidate {
   my ($self, $x, $y, $w, $h) = @_;

   return unless $self->{window};

   $self->queue_draw_area (
      map $_ * TILESIZE, $x - 1 , $y - 1, $w + 2, $h + 2
   );
}

sub invalidate_all {
   my ($self) = @_;

   $self->queue_draw;
}

sub update_map {
   my ($self, $x, $y, $w, $h) = @_;

   delete $self->{overlay};

   my $map = $self->{map}{map};
   my $ov  = $self->{face} ||= [];

   $x = 0; $w = $self->{map}{width};
   $y = 0; $h = $self->{map}{height};

   my @x = ($x .. $x + $w - 1);
   my @y = ($y .. $y + $h - 1);

   my $TC = \%Crossfire::Tilecache::TILECACHE;

   my @ov;

   # update overlay map with bigfaces and chained faces
   for my $x (@x) {
      my $ass = $self->{map}{map}[$x];
      my $oss = $ov->[$x] ||= [];
      for my $y (@y) {
         my $os = $oss->[$y] = [];
         for my $a (@{ $ass->[$y] || [] }) {
            my $o = $ARCH->{$a->{_name}}
               or (warn "arch '$a->{_name}' not found at ($x|$y)\n"), next;

            my $tile = $TC->{$a->{face} || $o->{face}}
               or (warn "no gfx found for arch '$a->{_name}' at ($x|$y)\n"), next;

            if ($tile->{w} > 1 || $tile->{h} > 1) {
               # bigfaces
               for my $ox (0 .. $tile->{w} - 1) {
                  for my $oy (0 .. $tile->{h} - 1) {
                     push @ov, [$x + $ox, $y + $oy,
                                $tile->{idx} + $ox + $oy * $tile->{w}];
                  }
               }

            } elsif ($o->{more}) {
               # linked faces
               do {
                  my $tile = $TC->{$o->{face}}
                     or (warn "no gfx found for arch '$a->{_name}' at ($x*|$y*)\n"), next;
                  push @ov, [$x + $o->{x}, $y + $o->{y}, $tile->{idx}];
               } while $o = $o->{more};

            } else {
               # single face
               push @$os, $tile->{idx};

            }
         }
      }
   }

   # bigger faces always on top, I don't give a shit to those who think otherwise
   for (@ov) {
      my ($x, $y, $idx) = @$_;

      push @{ $ov->[$x][$y] }, $idx;
   }
}

sub expose {
   my ($self, $event) = @_;

   no integer;

   my $ox = $self->{x}; my $ix = int $ox / TILESIZE;
   my $oy = $self->{y}; my $iy = int $oy / TILESIZE;

   # get_rectangles is buggy in older versions
   for my $area ($Gtk2::VERSION > 1.115 ? $event->region->get_rectangles : $event->area) {
      my ($x, $y, $w, $h) = $area->values; # x y w h

      my @x = ((int ($ox + $x) / TILESIZE) .. int +($ox + $x + $w + TILESIZE - 1) / TILESIZE);
      my @y = ((int ($oy + $y) / TILESIZE) .. int +($oy + $y + $h + TILESIZE - 1) / TILESIZE);

      my $PB = $Crossfire::Tilecache::TILECACHE;

      my $window = $self->{window};

      my $pb = new Gtk2::Gdk::Pixbuf 'rgb', 0, 8, TILESIZE * (@x + 1), TILESIZE * (@y + 1);
      $pb->fill (0x00000000);

      for my $x (@x) {
         my $dx = ($x - $x[0]) * TILESIZE;
         my $oss = $self->{face}[$x];

         for my $y (@y) {
            my $dy = ($y - $y[0]) * TILESIZE;

            for my $idx (@{$oss->[$y]}) {
               $PB->composite ($pb,
                  $dx, $dy,
                  TILESIZE, TILESIZE,
                  $dx - ($idx % 64) * TILESIZE, $dy - TILESIZE * int $idx / 64,
                  1, 1, 'nearest', 255
               );
            }
         }
      }

      $pb->render_to_drawable ($window, $self->style->black_gc,
               0, 0,
               $x[0] * TILESIZE - $ox, $y[0] * TILESIZE - $oy,
               TILESIZE * @x, TILESIZE * @y,
               'max', 0, 0);
   }

   $_->[4]->($self, $_->[0] - $self->{x}, $_->[1] - $self->{y})
      for values %{ $self->{overlay} || {} };
}

=back

=head1 AUTHOR

Marc Lehmann <schmorp@schmorp.de>

=cut

1