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package POE::XUL::ChangeManager; |
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use strict; |
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use warnings; |
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use Carp; |
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use Aspect; |
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use XUL::Node; |
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use XUL::Node::State; |
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# creating -------------------------------------------------------------------- |
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# windows is list of all top level nodes |
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# destroyed is buffer of all states scheduled for destruction on next flush |
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# next_node_id is next available node ID - 1 |
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sub new { |
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my $class = shift; |
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bless { windows => [], destroyed => [], next_node_id => 0 }, $class |
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} |
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# public interface for sessions ----------------------------------------------- |
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sub run_and_flush { |
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my ($self, $code) = (shift,shift); |
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local $_; |
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$code->($self,@_); |
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my $out = (join '', map { $self->flush_node($_) } @{$self->windows}). |
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(join '', map { $_->flush } @{$self->{destroyed}}); |
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$self->{destroyed} = []; |
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return $out; |
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} |
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sub destroy { |
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my $self = shift; |
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$_->destroy for @{$self->{windows}}; |
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delete $self->{windows}; |
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} |
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# advice ---------------------------------------------------------------------- |
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my $Self_Flow = cflow source => __PACKAGE__.'::run_and_flush'; |
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# when node changed register change on state |
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# if it has no state, give it one, give it an id, register the node, and |
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# register the node as a window if node is_window |
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after { |
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my $context = shift; |
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my $self = $context->source->self; |
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my $node = $context->self; |
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my $key = $context->params->[1]; |
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my $value = $context->params->[2]; |
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my $state = $self->node_state($node); |
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unless ($state) { |
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push @{$self->windows}, $node if $node->is_window; |
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$state = XUL::Node::State->new; |
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my $id = 'E'. ++$self->{next_node_id}; |
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$state->set_id($id); |
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$self->node_state($node, $state); |
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$self->event_manager->register_node($id, $node) |
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if $self->event_manager; |
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} |
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if ($key eq 'tag') { $state->set_tag($value) } |
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else { $state->set_attribute($key, $value) } |
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} call 'XUL::Node::set_attribute' & $Self_Flow; |
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# when node added, set parent node state id on child node state |
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before { |
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my $context = shift; |
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my $self = $context->source->self; |
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my $parent = $context->self; |
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my $child = $context->params->[1]; |
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my $index = $context->params->[2]; |
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my $child_state = $self->node_state($child); |
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$child_state->set_parent_id($self->node_state($parent)->get_id); |
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$child_state->set_index($index); |
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} call 'XUL::Node::_add_child_at_index' & $Self_Flow; |
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# when node destroyed, update state using set_destoyed |
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before { |
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my $context = shift; |
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my $self = $context->source->self; |
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my $parent = $context->self; |
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my $child = $parent->_compute_child_and_index($context->params->[1]); |
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my $child_state = $self->node_state($child); |
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$child_state->set_destroyed; |
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push @{$self->{destroyed}}, $child_state; |
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} call 'XUL::Node::remove_child' & $Self_Flow; |
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# private --------------------------------------------------------------------- |
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93
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sub flush_node { |
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my ($self, $node) = @_; |
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my $out = $self->node_state($node)->flush; |
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$out .= $self->flush_node($_) for $node->children; |
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return $out; |
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} |
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sub node_state { |
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my ($self, $node, $state) = @_; |
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croak "not a node: [$node]" unless UNIVERSAL::isa($node, 'XUL::Node'); |
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return $node->{state} unless $state; |
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$node->{state} = $state; |
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} |
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107
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sub event_manager { |
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my ($self, $event_manager) = @_; |
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return $self->{event_manager} unless $event_manager; |
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$self->{event_manager} = $event_manager; |
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} |
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113
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# testing --------------------------------------------------------------------- |
114
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115
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sub windows { shift->{windows} } |
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117
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1; |
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