X-Git-Url: http://git.vpit.fr/?a=blobdiff_plain;f=lib%2FLaTeX%2FTikZ%2FSet.pm;h=cf2386d85f6c62abdfb67943f2a756ca7a728c3c;hb=58ac8fce7c7d1d825f90340434ca71b1b9da843b;hp=dcaab09494b69c2971e619e21a787f9e19c757da;hpb=e8f0879ade07eed4f58cd52c0771f4e1ecc90b09;p=perl%2Fmodules%2FLaTeX-TikZ.git

diff --git a/lib/LaTeX/TikZ/Set.pm b/lib/LaTeX/TikZ/Set.pm
index dcaab09..cf2386d 100644
--- a/lib/LaTeX/TikZ/Set.pm
+++ b/lib/LaTeX/TikZ/Set.pm
@@ -9,66 +9,179 @@ LaTeX::TikZ::Set - Base role for LaTeX::TikZ set objects.
 
 =head1 VERSION
 
-Version 0.01
+Version 0.02
 
 =cut
 
-our $VERSION = '0.01';
+our $VERSION = '0.02';
 
-use LaTeX::TikZ::Set::Mod;
+use Scope::Guard ();
+
+use LaTeX::TikZ::Scope;
 
 use LaTeX::TikZ::Tools;
 
 use Any::Moose 'Role';
 
+=head1 ATTRIBUTES
+
+=head2 C<mods>
+
+Returns the list of the L<LaTeX::TikZ::Mod> objects associated with the current set.
+
+=cut
+
+has '_mods' => (
+ is       => 'ro',
+ isa      => 'Maybe[ArrayRef[LaTeX::TikZ::Mod]]',
+ init_arg => 'mods',
+ default  => sub { [ ] },
+ lazy     => 1,
+);
+
+sub mods { @{$_[0]->_mods} }
+
+=head1 METHODS
+
+This method is required by the interface :
+
+=over 4
+
+=item *
+
+C<draw $formatter>
+
+Returns an array reference of TikZ code lines required to effectively draw the current set object, formatted by the L<LaTeX::TikZ::Formatter> object C<$formatter>.
+
+=back
+
+=cut
+
 requires qw(
  draw
 );
 
-sub mod {
- my $set = $_[0];
+=head2 C<mod @mods>
 
- return $set unless @_ > 1;
+Apply the given list of L<LaTeX::TikZ::Mod> objects to the current set.
 
- # If $set is already a Tikz::Set::Mod object, the overridden method is
- # called instead. This ensures that you can't have two T::S::M objects in a
- # row.
+=cut
 
- # Prepend a new set with the mods
- my $new = LaTeX::TikZ::Set::Mod->new(
-  set  => $set,
-  mods => [ @_[1 .. $#_] ],
- );
+my $ltm_tc  = LaTeX::TikZ::Tools::type_constraint('LaTeX::TikZ::Mod');
+my $ltml_tc = LaTeX::TikZ::Tools::type_constraint('LaTeX::TikZ::Mod::Layer');
+my $ltmc_tc = LaTeX::TikZ::Tools::type_constraint('LaTeX::TikZ::Mod::Clip');
+
+sub mod {
+ my $set = shift;
+
+ my @mods = map $ltm_tc->coerce($_), @_;
+ $ltm_tc->assert_valid($_) for @mods;
 
- $_[0] = $new unless defined wantarray;
+ push @{$set->_mods}, @mods;
 
- $new;
+ $set;
 }
 
-my $ltml_tc = LaTeX::TikZ::Tools::type_constraint('LaTeX::TikZ::Mod::Layer');
-my $ltmc_tc = LaTeX::TikZ::Tools::type_constraint('LaTeX::TikZ::Mod::Clip');
+{
+ our %mods;
+ our $last_mod = 0;
+
+ around 'draw' => sub {
+  my ($orig, $set, $tikz) = @_;
+
+  local $last_mod = $last_mod;
+
+  # Save a deep copy
+  my %saved_idx = map { $_ => $#{$mods{$_}} } keys %mods;
+  my $guard     = Scope::Guard->new(sub {
+   for (keys %mods) {
+    if (exists $saved_idx{$_}) {
+     $#{$mods{$_}} = $saved_idx{$_};
+    } else {
+     delete $mods{$_};
+    }
+   }
+  });
+
+  my (@mods, $last_layer);
+MOD:
+  for my $mod ($set->mods) {
+   my $is_layer = $ltml_tc->check($mod);
+   $last_layer  = $mod if $is_layer;
+   my $tag = $mod->tag;
+   my $old = $mods{$tag} || [];
+   for (@$old) {
+    next MOD if $_->[0]->covers($mod);
+   }
+   push @{$mods{$tag}}, [ $mod, $last_mod++, $is_layer ];
+   push @mods,          $mod;
+  }
+
+  if ($last_layer) {
+   # Clips and mods don't propagate through layers. Hence if a layer is set,
+   # force their reuse.
+   @mods = $last_layer;
+   push @mods, map $_->[0],
+                sort { $a->[1] <=> $b->[1] }
+                 grep !$_->[2],
+                  map @$_,
+                   values %mods;
+  }
+
+  my $body = $set->$orig($tikz);
+
+  if (@mods) {
+   $body = LaTeX::TikZ::Scope->new
+                             ->mod(map $_->apply($tikz), @mods)
+                             ->body($body);
+  }
+
+  $body;
+ };
+}
+
+=head2 C<layer $layer>
+
+Puts the current set in the corresponding layer.
+This is a shortcut for C<< $set->mod(Tikz->layer($layer)) >>.
+
+=cut
 
 sub layer {
- return $_[0] unless @_ > 1;
+ my $set = shift;
 
- my $layer = $_[1];
+ return $set unless @_;
 
- $_[0]->mod(
+ my $layer = $_[0];
+ $set->mod(
   $ltml_tc->check($layer) ? $layer
                           : LaTeX::TikZ::Mod::Layer->new(name => $layer)
  )
 }
 
+=head2 C<clip $path>
+
+Clips the current set by the path given by C<$path>.
+This is a shortcut for C<< $set->mod(Tikz->clip($path)) >>.
+
+=cut
+
 sub clip {
- return $_[0] unless @_ > 1;
+ my $set = shift;
+
+ return $set unless @_;
 
- $_[0]->mod(
+ $set->mod(
   map {
-   $ltmc_tc->check($_) ? $_ : LaTeX::TikZ::Mod::Clip->new($_)
-  } @_[1 .. $#_]
+   $ltmc_tc->check($_) ? $_ : LaTeX::TikZ::Mod::Clip->new(clip => $_)
+  } @_
  )
 }
 
+=head1 SEE ALSO
+
+L<LaTeX::TikZ>.
+
 =head1 AUTHOR
 
 Vincent Pit, C<< <perl at profvince.com> >>, L<http://www.profvince.com>.