1 files changed, 36 insertions, 0 deletions
diff --git a/lib/Reaction/UI/ViewPort/Field/Role/Mutable/Simple.pm b/lib/Reaction/UI/ViewPort/Field/Role/Mutable/Simple.pm
new file mode 100644
index 0000000..66fa464
--- /dev/null
+++ b/lib/Reaction/UI/ViewPort/Field/Role/Mutable/Simple.pm
@@ -0,0 +1,36 @@
+package Reaction::UI::ViewPort::Field::Role::Mutable::Simple;
+
+use Reaction::Role;
+
+use aliased 'Reaction::UI::ViewPort::Field::Role::Mutable';
+
+role Simple which {
+
+  does Mutable;
+
+  has value_string => (
+    is => 'rw', lazy_build => 1, trigger_adopt('value_string'),
+    clearer => 'clear_value',
+  );
+
+  around value_string => sub {
+    my $orig = shift;
+    my $self = shift;
+    if (@_ && defined($_[0]) && !ref($_[0]) && $_[0] eq ''
+        && !$self->value_is_required) {
+      $self->clear_value;
+      return undef;
+    }
+    return $self->$orig(@_);
+  };
+
+  # the user needs to implement this because, honestly, you're always going
+  # to need to do something custom and the only common thing really is
+  # "you probably set $self->value at the end"
+  requires 'adopt_value_string';
+
+  around accept_events => sub { ('value_string', shift->(@_)) };
+
+};
+
+1;