App: special-case (de)activation for main_surface

Signed-off-by: Marcus Fritzsch <marcus_fritzsch@mentor.com>

1 files changed, 27 insertions, 3 deletions

diff --git a/src/app.cpp b/src/app.cpp
index 040e0b0..7673ba9 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -379,6 +379,7 @@ void App::surface_set_layout_split(uint32_t surface_id, uint32_t sub_surface_id)
 }
 
 char const *App::activate_surface(char const *drawing_name) {
+   ST();
    auto const &surface_id = this->lookup_id(drawing_name);
 
    if (!surface_id) {
@@ -393,6 +394,22 @@ char const *App::activate_surface(char const *drawing_name) {
       return "Surface already active";
    }
 
+   // Special case main_surface
+   if (*surface_id == this->layers.main_surface) {
+      for (auto const &s: this->controller->surfaces) {
+         if (s.second->id != *surface_id) {
+            this->deactivate(s.second->id);
+         }
+      }
+      this->activate(*surface_id);
+      this->state.main = this->state.sub = -1;
+      this->state.s = LayoutState::Single;
+      // commit changes
+      this->controller->commit_changes();
+      this->display->flush();
+      return nullptr;
+   }
+
    // 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
@@ -449,6 +466,7 @@ char const *App::activate_surface(char const *drawing_name) {
 }
 
 char const *App::deactivate_surface(char const *drawing_name) {
+   ST();
    auto const &surface_id = this->lookup_id(drawing_name);
 
    if (!surface_id) {
@@ -463,6 +481,11 @@ char const *App::deactivate_surface(char const *drawing_name) {
       return "No surface active";
    }
 
+   if (*surface_id == this->layers.main_surface) {
+      logdebug("Refusing to deactivate main_surface %d", *surface_id);
+      return nullptr;
+   }
+
    if (this->state.main == *surface_id) {
       if (this->state.sub != -1) {
          this->emit_syncdraw(this->lookup_name(this->state.sub)->c_str());
@@ -505,9 +528,10 @@ char const *App::deactivate_surface(char const *drawing_name) {
 // | .__/|_|  \___/_/\_\_|\___|\__,_| |_____| \_/ \___|_| |_|\__|___/
 // |_|
 void App::surface_created(uint32_t surface_id) {
-   logdebug("surface_id is %u", surface_id);
+   auto layer_id = this->layers.get_layer_id(surface_id);
+   logdebug("surface_id is %u, layer_id is %u", surface_id, layer_id ? *layer_id : -1u);
 
-   this->controller->layers[this->layers.get_layer_id(surface_id).value()]
+   this->controller->layers[*layer_id]
            ->add_surface(this->controller->surfaces[surface_id].get());
 
    // activate the main_surface right away
@@ -560,7 +584,7 @@ result<int> App::request_surface(char const *drawing_name) {
    if (!rname) {
       // name does not exist yet, allocate surface id...
       auto id = int(this->id_alloc.generate_id(drawing_name));
-      this->layers.add_surface(id, lid.value());
+      this->layers.add_surface(id, *lid);
 
       // XXX: we set the main_surface[_name] here and now,
       // not sure if we want this, but it worked so far.