+ h /= 2;
+ y_off = h;
+ }
+
+ // configure surface to wxh dimensions
+ s->set_configuration(w, h);
+ // set source reactangle, even if we should not need to set it.
+ s->set_source_rectangle(0, 0, w, h);
+ // set destination to the display rectangle
+ s->set_destination_rectangle(x, y, w, h);
+
+ // configure surface to wxh dimensions
+ ss->set_configuration(w, h);
+ // set source reactangle, even if we should not need to set it.
+ ss->set_source_rectangle(0, 0, w, h);
+ // set destination to the display rectangle
+ ss->set_destination_rectangle(x+x_off, y+y_off, w, h);
+
+ //redraw_fix(this, s, x, y, w, h);
+ //redraw_fix(this, ss, x+x_off, y+y_off, w, h);
+
+ logdebug("Surface %u now on layer %u with rect { %d, %d, %d, %d }",
+ surface_id, layer_id, x, y, w, h);
+}
+
+char const *App::activate_surface(char const *drawing_name) {
+ ST();
+ auto const &surface_id = this->lookup_id(drawing_name);
+
+ if (!surface_id) {
+ return "Surface does not exist";
+ }
+
+ if (!this->controller->surface_exists(*surface_id)) {
+ return "Surface does not exist in controller!";
+ }
+
+ auto layer_id = this->layers.get_layer_id(*surface_id);
+
+ if (! layer_id) {
+ return "Surface is not on any layer!";
+ }
+
+ struct LayoutState &state = **this->layers.get_layout_state(*surface_id);
+
+ // disable layers that are above our current layer
+ for (auto const &l : this->layers.mapping) {
+ if (l.layer_id <= *layer_id) {
+ continue;
+ }
+
+ bool flush = false;
+ if (l.state.main != -1) {
+ this->deactivate(l.state.main);
+ l.state.main = -1;
+ flush = true;
+ }
+
+ if (l.state.sub != -1) {
+ this->deactivate(l.state.sub);
+ l.state.sub = -1;
+ flush = true;
+ }
+
+ l.state.s = LayoutState::Single;
+
+ if (flush) {
+ this->controller->commit_changes();
+ this->display->flush();
+ }
+ }
+
+ if (state.main == *surface_id || state.sub == *surface_id) {
+ return "Surface already active";
+ }
+
+ // This should involve a policy check, but as we do not (yet) have
+ // such a thing, we will just switch to this surface.
+ // XXX: input focus missing!!1
+
+ if (state.main == -1) {
+ this->emit_syncdraw(drawing_name);
+
+ this->surface_set_layout_full(*surface_id);
+ this->activate(*surface_id);
+ state.main = *surface_id;
+ state.sub = -1;
+ state.s = LayoutState::Single;
+
+ this->emit_flushdraw(drawing_name);
+ } else {
+ bool can_split = this->can_split(state, *surface_id);
+
+ if (state.sub == -1) {
+ if (can_split) {
+ if (state.main != *surface_id) {
+ this->emit_syncdraw(drawing_name);
+ this->emit_syncdraw(this->lookup_name(state.main)->c_str());
+
+ this->surface_set_layout_split(state.main, *surface_id);
+ this->activate(*surface_id);
+ state.sub = *surface_id;
+
+ // Should wait for EndDraw event...
+ this->emit_flushdraw(drawing_name);
+ this->emit_flushdraw(this->lookup_name(state.main)->c_str());
+ }
+ } else {
+ this->emit_syncdraw(drawing_name);
+
+ this->surface_set_layout_full(*surface_id);
+ this->deactivate(state.main);
+ this->activate(*surface_id);
+ this->deactivate(state.sub);
+ state.main = *surface_id;
+ state.sub = -1;
+ state.s = LayoutState::Single;
+
+ this->emit_flushdraw(drawing_name);
+ }
+ }
+ }
+
+ // commit changes
+ this->controller->commit_changes();
+ this->display->flush();
+
+ // no error
+ return nullptr;
+}
+
+char const *App::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";
+ }
+
+ struct LayoutState &state = **this->layers.get_layout_state(*surface_id);
+
+ if (state.main == -1) {
+ return "No surface active";
+ }
+
+ 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->emit_syncdraw(this->lookup_name(state.sub)->c_str());
+
+ this->deactivate(*surface_id);
+ this->surface_set_layout_full(state.sub);
+ state.main = state.sub;
+ state.sub = -1;
+ state.s = LayoutState::Single;
+
+ this->emit_flushdraw(this->lookup_name(state.sub)->c_str());
+ } else {
+ this->deactivate(*surface_id);
+ state.main = -1;
+ }
+ }else if (state.sub == *surface_id) {
+ this->emit_syncdraw(this->lookup_name(state.main)->c_str());
+
+ this->deactivate(*surface_id);
+ this->deactivate(*surface_id);
+ this->surface_set_layout_full(state.main);
+ state.sub = -1;
+ state.s = LayoutState::Single;
+
+ this->emit_flushdraw(this->lookup_name(state.main)->c_str());
+ } else {
+ return "Surface is not active";
+ }
+
+ this->controller->commit_changes();
+ this->display->flush();
+
+ return nullptr;
+}
+
+// _ _ _____ _
+// _ __ _ __ _____ _(_) ___ __| | | ____|_ _____ _ __ | |_ ___
+// | '_ \| '__/ _ \ \/ / |/ _ \/ _` | | _| \ \ / / _ \ '_ \| __/ __|
+// | |_) | | | (_) > <| | __/ (_| | | |___ \ V / __/ | | | |_\__ \
+// | .__/|_| \___/_/\_\_|\___|\__,_| |_____| \_/ \___|_| |_|\__|___/
+// |_|
+void App::surface_created(uint32_t surface_id) {
+ auto layer_id = this->layers.get_layer_id(surface_id);
+ if (! layer_id) {
+ logdebug("Newly created surfce %d is not associated with any layer!", surface_id);
+ return;
+ }
+
+ logdebug("surface_id is %u, layer_id is %u", surface_id, *layer_id);
+
+ this->controller->layers[*layer_id]
+ ->add_surface(this->controller->surfaces[surface_id].get());
+
+ // activate the main_surface right away
+ if (surface_id == static_cast<unsigned>(this->layers.main_surface)) {
+ logdebug("Activating main_surface (%d)", surface_id);
+
+ this->activate_surface(
+ this->lookup_name(surface_id).value_or("unknown-name").c_str());