app: added enddraw() and deactivate_surface()

Implementation untested, not sure if this is even sensible...

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

2 files changed, 101 insertions, 11 deletions

diff --git a/src/app.cpp b/src/app.cpp
index 07747b9..76668cc 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -129,7 +129,8 @@ App::App(wl::display *d)
      layers(),
      pending(),
      name_mapping(),
-     id_alloc{} {
+     id_alloc{},
+     last_active() {
    assert(g_app == nullptr);
    g_app = this;
 
@@ -177,7 +178,7 @@ int App::init() {
 
    this->display->add_global_handler(
       "ivi_controller", [this](wl_registry *r, uint32_t name, uint32_t v) {
-         this->controller = std::make_unique<genivi::controller>(r, name, v);
+         this->controller = std::make_unique<struct genivi::controller>(r, name, v);
 
          // Init controller hooks
          this->controller->chooks = &this->chooks;
@@ -270,6 +271,11 @@ int App::init_layout() {
 }
 
 void App::surface_set_layout(uint32_t surface_id) {
+   if (!this->controller->surface_exists(surface_id)) {
+      logerror("Surface %d does not exist", int(surface_id));
+      return;
+   }
+
    auto o_layer_id = this->layers.get_layer_id(surface_id);
 
    if (!o_layer_id) {
@@ -277,11 +283,6 @@ void App::surface_set_layout(uint32_t surface_id) {
       return;
    }
 
-   if (!this->controller->surface_exists(surface_id)) {
-      logerror("Surface %d does not exist", int(surface_id));
-      return;
-   }
-
    uint32_t layer_id = o_layer_id.value();
    logdebug("surface_set_layout for surface %u on layer %u", surface_id,
             layer_id);
@@ -346,10 +347,50 @@ char const *App::activate_surface(uint32_t surface_id) {
    this->controller->commit_changes();
    this->display->flush();
 
+   // Current active surface is the first in last_active
+   this->last_active.push_front(s->id);
+   /// // XXX: I am not sure I even need 5 elements...
+   /// this->last_active.resize(std::min(int(this->last_active.size()), 5));
+
+
    // no error
    return nullptr;
 }
 
+char const *App::deactivate_surface(uint32_t surface_id) {
+   if (surface_id == this->layers.main_surface) {
+      return "Cannot deactivate main_surface";
+   }
+
+   if (this->last_active.empty()) {
+      return "Cannot deactivate surface (not active)";
+   }
+
+   // XXX: should an active surface not alsways be front() or
+   // front+1() of last_active?!
+
+   // XXX: Should I really be able to deactivate a surface that is not
+   // front() of last_active?
+   auto is = std::find(this->last_active.begin(),
+                       this->last_active.end(),
+                       surface_id);
+
+   if (is == this->last_active.end()) {
+      return "Cannot deactivate surface (not active)";
+   }
+
+   this->last_active.erase(is);
+
+   if (! this->last_active.empty()) {
+      // Should be active already, shouldn't it?
+      this->activate_surface(this->last_active.front());
+   } else {
+      this->activate_surface(this->layers.main_surface);
+   }
+
+   return nullptr;
+}
+
 void App::add_task(char const *name, std::function<void()> &&f) {
    this->pending.emplace_back(std::make_pair(name, f));
 }
@@ -373,6 +414,8 @@ void App::execute_pending() {
 // | .__/|_|  \___/_/\_\_|\___|\__,_| |_____| \_/ \___|_| |_|\__|___/
 // |_|
 void App::surface_created(uint32_t surface_id) {
+   surface_id &= id_allocator::id_mask;
+
    logdebug("surface_id is %u", surface_id);
 
    // We need to execute the surface setup after its creation.
@@ -381,10 +424,21 @@ void App::surface_created(uint32_t surface_id) {
 }
 
 void App::surface_removed(uint32_t surface_id) {
+   surface_id &= id_allocator::id_mask;
+
    logdebug("surface_id is %u", surface_id);
 
    this->add_task("remove surface ID",
-                  [surface_id, this] { this->id_alloc.remove_id(surface_id); });
+                  [surface_id, this] {
+                     this->id_alloc.remove_id(surface_id);
+
+                     // Also remove from last_active, if found
+                     auto i = std::find(this->last_active.begin(),
+                                        this->last_active.end(), surface_id);
+                     if (i != this->last_active.end()) {
+                        this->last_active.erase(i);
+                     }
+                  });
 }
 
 result<int> App::request_surface(char const *drawing_name) {
@@ -421,8 +475,20 @@ char const *App::activate_surface(char const *drawing_name) {
    if (osid) {
       logdebug("ativate surface with name %s and id %u", drawing_name,
                osid.value());
-      this->activate_surface(osid.value());
-      return nullptr;
+      return this->activate_surface(osid.value());
+   }
+
+   logerror("surface %s unknown", drawing_name);
+   return "Surface unknown";
+}
+
+char const *App::deactivate_surface(char const *drawing_name) {
+   auto osid = this->id_alloc.lookup(drawing_name);
+
+   if (osid) {
+      logdebug("deativate surface with name %s and id %u", drawing_name,
+               osid.value());
+      return this->deactivate_surface(osid.value());
    }
 
    logerror("surface %s unknown", drawing_name);
@@ -454,7 +520,22 @@ binding_api::result_type binding_api::activate_surface(
    return Ok(json_object_new_object());
 }
 
+binding_api::result_type binding_api::deactivate_surface(char const* drawing_name) {
+   logdebug("%s drawing_name %s", __func__, drawing_name);
+   auto r = this->app->deactivate_surface(drawing_name);
+   if (r != nullptr) {
+      return Err<json_object *>(r);
+   }
+   return Ok(json_object_new_object());
+}
+
+binding_api::result_type binding_api::enddraw(char const* drawing_name) {
+   logdebug("%s drawing_name %s", __func__, drawing_name);
+   return Err<json_object*>("not implemented");
+}
+
 binding_api::result_type binding_api::list_drawing_names() {
+   logdebug("%s", __func__);
    json j = this->app->id_alloc.names;
    return Ok(json_tokener_parse(j.dump().c_str()));
 }
diff --git a/src/app.hpp b/src/app.hpp
index 8f30d96..ac2eca6 100644
--- a/src/app.hpp
+++ b/src/app.hpp
@@ -21,6 +21,7 @@
 #include <memory>
 #include <unordered_map>
 #include <unordered_set>
+#include <deque>
 
 #include "afb_binding_api.hpp"
 #include "config.hpp"
@@ -41,7 +42,10 @@ struct controller;
 namespace wm {
 
 struct id_allocator {
-   unsigned next = 0x0100'0000;
+   constexpr static unsigned id_shift = 20;
+   constexpr static unsigned id_mask = (1 << id_shift) - 1;
+
+   unsigned next = 1;
 
    // Surfaces that where requested but not yet created
    std::unordered_map<unsigned, std::string> surfaces;
@@ -56,6 +60,7 @@ struct id_allocator {
    // Insert and return a new ID
    unsigned generate_id(std::string const &name) {
       unsigned sid = this->next++;
+      sid <<= id_shift;
       this->surfaces[sid] = name;
       // this->pending_surfaces.insert({sid});
       this->names[name] = sid;
@@ -117,6 +122,8 @@ struct App {
 
    struct id_allocator id_alloc;
 
+   std::deque<unsigned> last_active;
+
    explicit App(wl::display *d);
    ~App();
 
@@ -132,12 +139,14 @@ struct App {
 
    void surface_set_layout(uint32_t surface_id);
    char const *activate_surface(uint32_t surface_id);
+   char const *deactivate_surface(uint32_t surface_id);
 
    // Allocate a surface ID for this role
    result<int> request_surface(char const *drawing_name);
 
    // Activate (i.e. make visible, if allowed!) a surface
    char const *activate_surface(char const *drawing_name);
+   char const *deactivate_surface(char const *drawing_name);
 
    // add tasks, executed after dispatch_events()
    void add_task(char const *name, std::function<void()> &&f);