+char const *App::api_deactivate_surface(char const *drawing_name) {
+ ST();
+ auto const &surface_id = this->lookup_id(drawing_name);
+
+ if (!surface_id) {
+ return "Surface does not exist";
+ }
+
+ if (*surface_id == this->layers.main_surface) {
+ return "Cannot deactivate main_surface";
+ }
+
+ auto o_state = *this->layers.get_layout_state(*surface_id);
+
+ if (!o_state) {
+ return "Could not find layer for surface";
+ }
+
+ struct LayoutState &state = *o_state;
+
+ if (state.main == -1) {
+ return "No surface active";
+ }
+
+ // XXX: check against main_surface, main_surface_name is the configuration
+ // item.
+ if (*surface_id == this->layers.main_surface) {
+ logdebug("Refusing to deactivate main_surface %d", *surface_id);
+ return nullptr;
+ }
+
+ if (state.main == *surface_id) {
+ if (state.sub != -1) {
+ this->try_layout(
+ state, LayoutState{state.sub, -1}, [&] (LayoutState const &nl) {
+ std::string sub = std::move(*this->lookup_name(state.sub));
+
+ this->deactivate(*surface_id);
+ this->surface_set_layout(state.sub);
+ state = nl;
+
+ this->layout_commit();
+ this->emit_syncdraw(sub.c_str());
+ this->enqueue_flushdraw(state.sub);
+ });
+ } else {
+ this->try_layout(state, LayoutState{-1, -1}, [&] (LayoutState const &nl) {
+ this->deactivate(*surface_id);
+ state = nl;
+ this->layout_commit();
+ });
+ }
+ } else if (state.sub == *surface_id) {
+ this->try_layout(
+ state, LayoutState{state.main, -1}, [&] (LayoutState const &nl) {
+ std::string main = std::move(*this->lookup_name(state.main));
+
+ this->deactivate(*surface_id);
+ this->surface_set_layout(state.main);
+ state = nl;
+
+ this->layout_commit();
+ this->emit_syncdraw(main.c_str());
+ this->enqueue_flushdraw(state.main);
+ });
+ } else {
+ return "Surface is not active";
+ }
+
+ return nullptr;
+}
+
+void App::enqueue_flushdraw(int surface_id) {
+ this->check_flushdraw(surface_id);
+ logdebug("Enqueuing EndDraw for surface_id %d", surface_id);
+ this->pending_end_draw.push_back(surface_id);
+}
+
+void App::check_flushdraw(int surface_id) {
+ auto i = std::find(std::begin(this->pending_end_draw),
+ std::end(this->pending_end_draw), surface_id);
+ if (i != std::end(this->pending_end_draw)) {
+ auto n = this->lookup_name(surface_id);
+ logerror("Application %s (%d) has pending EndDraw call(s)!",
+ n ? n->c_str() : "unknown-name", surface_id);
+ std::swap(this->pending_end_draw[std::distance(
+ std::begin(this->pending_end_draw), i)],
+ this->pending_end_draw.back());
+ this->pending_end_draw.resize(this->pending_end_draw.size() - 1);
+ }
+}
+
+char const *App::api_enddraw(char const *drawing_name) {
+ for (unsigned i = 0, iend = this->pending_end_draw.size(); i < iend; i++) {
+ auto n = this->lookup_name(this->pending_end_draw[i]);
+ if (n && *n == drawing_name) {
+ std::swap(this->pending_end_draw[i], this->pending_end_draw[iend - 1]);
+ this->pending_end_draw.resize(iend - 1);
+ // XXX: Please tell the compositor to thaw the surface...
+ this->emit_flushdraw(drawing_name);
+ return nullptr;
+ }
+ }
+ return "No EndDraw pending for surface";
+}
+
+void App::api_ping() { this->dispatch_pending_events(); }
+