+
+/** @return The number of ports of our type in the given channel count,
+ * but returning 1 if there are no ports.
+ */
+uint32_t
+PortMatrix::count_of_our_type_min_1 (ChanCount c) const
+{
+ uint32_t n = count_of_our_type (c);
+ if (n == 0) {
+ n = 1;
+ }
+
+ return n;
+}
+
+PortMatrixNode::State
+PortMatrix::get_association (PortMatrixNode node) const
+{
+ if (show_only_bundles ()) {
+
+ bool have_off_diagonal_association = false;
+ bool have_diagonal_association = false;
+ bool have_diagonal_not_association = false;
+
+ for (uint32_t i = 0; i < node.row.bundle->nchannels().n_total(); ++i) {
+
+ for (uint32_t j = 0; j < node.column.bundle->nchannels().n_total(); ++j) {
+
+ if (!should_show (node.row.bundle->channel_type(i)) || !should_show (node.column.bundle->channel_type(j))) {
+ continue;
+ }
+
+ ARDOUR::BundleChannel c[2];
+ c[row_index()] = ARDOUR::BundleChannel (node.row.bundle, i);
+ c[column_index()] = ARDOUR::BundleChannel (node.column.bundle, j);
+
+ PortMatrixNode::State const s = get_state (c);
+
+ switch (s) {
+ case PortMatrixNode::ASSOCIATED:
+ if (i == j) {
+ have_diagonal_association = true;
+ } else {
+ have_off_diagonal_association = true;
+ }
+ break;
+
+ case PortMatrixNode::NOT_ASSOCIATED:
+ if (i == j) {
+ have_diagonal_not_association = true;
+ }
+ break;
+
+ default:
+ break;
+ }
+ }
+ }
+
+ if (have_diagonal_association && !have_off_diagonal_association && !have_diagonal_not_association) {
+ return PortMatrixNode::ASSOCIATED;
+ } else if (!have_diagonal_association && !have_off_diagonal_association) {
+ return PortMatrixNode::NOT_ASSOCIATED;
+ }
+
+ return PortMatrixNode::PARTIAL;
+
+ } else {
+
+ ARDOUR::BundleChannel c[2];
+ c[column_index()] = node.column;
+ c[row_index()] = node.row;
+ return get_state (c);
+
+ }
+
+ /* NOTREACHED */
+ return PortMatrixNode::NOT_ASSOCIATED;
+}
+
+/** @return true if b is a non-zero pointer and the bundle it points to has some channels */
+bool
+PortMatrix::bundle_with_channels (boost::shared_ptr<ARDOUR::Bundle> b)
+{
+ return b && b->nchannels() != ARDOUR::ChanCount::ZERO;
+}
+
+/** See if a `flip' is possible.
+ * @return If flip is possible, the new (row, column) notebook indices that
+ * should be selected; otherwise, (-1, -1)
+ */
+pair<int, int>
+PortMatrix::check_flip () const
+{
+ /* Look for the row's port group name in the columns */
+
+ int new_column = 0;
+ boost::shared_ptr<const PortGroup> r = visible_ports (_row_index);
+ PortGroupList::List::const_iterator i = _ports[_column_index].begin();
+ while (i != _ports[_column_index].end() && (*i)->name != r->name) {
+ ++i;
+ ++new_column;
+ }
+
+ if (i == _ports[_column_index].end ()) {
+ return make_pair (-1, -1);
+ }
+
+ /* Look for the column's port group name in the rows */
+
+ int new_row = 0;
+ boost::shared_ptr<const PortGroup> c = visible_ports (_column_index);
+ i = _ports[_row_index].begin();
+ while (i != _ports[_row_index].end() && (*i)->name != c->name) {
+ ++i;
+ ++new_row;
+ }
+
+ if (i == _ports[_row_index].end ()) {
+ return make_pair (-1, -1);
+ }
+
+ if (_arrangement == LEFT_TO_BOTTOM) {
+ new_row = _ports[_row_index].size() - new_row - 1;
+ }
+
+ return make_pair (new_row, new_column);
+}
+
+bool
+PortMatrix::can_flip () const
+{
+ return check_flip().first != -1;
+}
+
+/** Flip the column and row pages around, if possible */
+void
+PortMatrix::flip ()
+{
+ pair<int, int> n = check_flip ();
+ if (n.first == -1) {
+ return;
+ }
+
+ _vnotebook.set_current_page (n.first);
+ _hnotebook.set_current_page (n.second);
+}
+
+bool
+PortMatrix::key_press (GdkEventKey* k)
+{
+ if (k->keyval == GDK_f) {
+ flip ();
+ return true;
+ }
+
+ return false;
+}