Add PolicyManager, related classes and some config files

- PolicyManager
    Decide next layout by using occured event and current state
    based on policy table.
    This PolicyManger is reference and the OEMs can replace it.

- LayoutManager
    Change the current layout to the layout
    which decided by PolicyManager.

    NOTE:
    The functions of this class had been included in App class.
    The part of function of this class remain there yet.

- LowCanClient
    Receive the CAN signal from low level CAN service.

- app.db
    Define the applications name and its role.
    This file will be deleted
    when the names and roles can be given by other module.

- layout.cb
    Define the layouts and areas which are included by the layout.

- role.db
    Define the roles of the applications.

Change-Id: I2f84bdf5e68355e022f516cee9a1db88efe58825
Signed-off-by: Yuta Doi <yuta-d@witz-inc.co.jp>

1 files changed, 537 insertions, 365 deletions

diff --git a/src/app.cpp b/src/app.cpp
index 937da6a..20f5b56 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -34,6 +34,7 @@
 #include <json.hpp>
 #include <regex>
 #include <thread>
+#include <string>
 
 
 namespace wm {
@@ -130,6 +131,17 @@ int App::init() {
       return -1;
    }
 
+#if 1 // @@@@@
+   // Load app.db
+   this->loadAppDb();
+#endif
+
+   // Initialize PolicyManager
+   this->pm_.initialize();
+
+   // Initialize LayoutManager
+   this->lm_.initialize();
+
    // Make afb event
    for (int i=Event_Val_Min; i<=Event_Val_Max; i++) {
       map_afb_event[kListEventName[i]] = afb_daemon_make_event(kListEventName[i]);
@@ -245,328 +257,177 @@ int App::init_layers() {
    return 0;
 }
 
-void App::surface_set_layout(int surface_id, optional<int> sub_surface_id) {
-   if (!this->controller->surface_exists(surface_id)) {
-      HMI_ERROR("wm", "Surface %d does not exist", surface_id);
-      return;
-   }
-
-   auto o_layer_id = this->layers.get_layer_id(surface_id);
-
-   if (!o_layer_id) {
-      HMI_ERROR("wm", "Surface %d is not associated with any layer!", surface_id);
-      return;
-   }
-
-   uint32_t layer_id = *o_layer_id;
-
-   auto const &layer = this->layers.get_layer(layer_id);
-   auto rect = layer.value().rect;
-   auto &s = this->controller->surfaces[surface_id];
-
-   int x = rect.x;
-   int y = rect.y;
-   int w = rect.w;
-   int h = rect.h;
-
-   // less-than-0 values refer to MAX + 1 - $VALUE
-   // e.g. MAX is either screen width or height
-   if (w < 0) {
-      w = this->controller->output_size.w + 1 + w;
-   }
-   if (h < 0) {
-      h = this->controller->output_size.h + 1 + h;
-   }
-
-   if (sub_surface_id) {
-      if (o_layer_id != this->layers.get_layer_id(*sub_surface_id)) {
-         HMI_ERROR("wm",
-            "surface_set_layout: layers of surfaces (%d and %d) don't match!",
-            surface_id, *sub_surface_id);
-         return;
-      }
-
-      int x_off = 0;
-      int y_off = 0;
-
-      // split along major axis
-      if (w > h) {
-         w /= 2;
-         x_off = w;
-      } else {
-         h /= 2;
-         y_off = h;
-      }
-
-      auto &ss = this->controller->surfaces[*sub_surface_id];
-
-      HMI_DEBUG("wm", "surface_set_layout for sub surface %u on layer %u",
-               *sub_surface_id, layer_id);
-
-      // set destination to the display rectangle
-      ss->set_destination_rectangle(x + x_off, y + y_off, w, h);
-
-      this->area_info[*sub_surface_id].x = x;
-      this->area_info[*sub_surface_id].y = y;
-      this->area_info[*sub_surface_id].w = w;
-      this->area_info[*sub_surface_id].h = h;
-   }
-
-   HMI_DEBUG("wm", "surface_set_layout for surface %u on layer %u", surface_id,
-            layer_id);
-
-   // set destination to the display rectangle
-   s->set_destination_rectangle(x, y, w, h);
-
-   // update area information
-   this->area_info[surface_id].x = x;
-   this->area_info[surface_id].y = y;
-   this->area_info[surface_id].w = w;
-   this->area_info[surface_id].h = h;
-
-   HMI_DEBUG("wm", "Surface %u now on layer %u with rect { %d, %d, %d, %d }",
-            surface_id, layer_id, x, y, w, h);
-}
-
 void App::layout_commit() {
    this->controller->commit_changes();
    this->display->flush();
 }
 
-void App::api_activate_surface(char const *drawing_name, char const *drawing_area, const reply_func &reply) {
-   ST();
-
-   auto const &surface_id = this->lookup_id(drawing_name);
-
-   if (!surface_id) {
-       reply("Surface does not exist");
-       return;
-   }
-
-   if (!this->controller->surface_exists(*surface_id)) {
-      reply("Surface does not exist in controller!");
-      return;
-   }
-
-   auto layer_id = this->layers.get_layer_id(*surface_id);
-
-   if (!layer_id) {
-      reply("Surface is not on any layer!");
-      return;
-   }
-
-   auto o_state = *this->layers.get_layout_state(*surface_id);
-
-   if (o_state == nullptr) {
-      reply("Could not find layer for surface");
-      return;
-   }
-
-   HMI_DEBUG("wm", "surface %d is detected", *surface_id);
-   reply(nullptr);
-
-   struct LayoutState &state = *o_state;
-
-   // disable layers that are above our current layer
-   for (auto const &l : this->layers.mapping) {
-      if (l.second.layer_id <= *layer_id) {
-         continue;
-      }
-
-      bool flush = false;
-      if (l.second.state.main != -1) {
-         this->deactivate(l.second.state.main);
-         l.second.state.main = -1;
-         flush = true;
-      }
-
-      if (l.second.state.sub != -1) {
-         this->deactivate(l.second.state.sub);
-         l.second.state.sub = -1;
-         flush = true;
-      }
-
-      if (flush) {
-         this->layout_commit();
-      }
-   }
-
-   auto layer = this->layers.get_layer(*layer_id);
-
-   if (state.main == -1) {
-      this->try_layout(
-         state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
-            HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
-            this->surface_set_layout(*surface_id);
-            state = nl;
-
-            // Commit for configuraton
-            this->layout_commit();
-
-            std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
-            compositor::rect area_rect = this->area_info[*surface_id];
-            this->emit_syncdraw(drawing_name, str_area.c_str(),
-                                area_rect.x, area_rect.y, area_rect.w, area_rect.h);
-            this->enqueue_flushdraw(state.main);
-         });
-   } else {
-      if (0 == strcmp(drawing_name, "HomeScreen")) {
-         this->try_layout(
-            state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
-               HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
-               std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
-               compositor::rect area_rect = this->area_info[*surface_id];
-               this->emit_syncdraw(drawing_name, str_area.c_str(),
-                                   area_rect.x, area_rect.y, area_rect.w, area_rect.h);
-               this->enqueue_flushdraw(state.main);
-            });
-      } else {
-         bool can_split = this->can_split(state, *surface_id);
-
-         if (can_split) {
-            this->try_layout(
-               state,
-               LayoutState{state.main, *surface_id},
-               [&] (LayoutState const &nl) {
-                  HMI_DEBUG("wm", "Layout: %s", kNameLayoutSplit);
-                  std::string main =
-                     std::move(*this->lookup_name(state.main));
-
-                  this->surface_set_layout(state.main, surface_id);
-                  if (state.sub != *surface_id) {
-                      if (state.sub != -1) {
-                         this->deactivate(state.sub);
-                      }
-                  }
-                  state = nl;
-
-                  // Commit for configuration and visibility(0)
-                  this->layout_commit();
-
-                  std::string str_area_main = std::string(kNameLayoutSplit) + "." + std::string(kNameAreaMain);
-                  std::string str_area_sub = std::string(kNameLayoutSplit) + "." + std::string(kNameAreaSub);
-                  compositor::rect area_rect_main = this->area_info[state.main];
-                  compositor::rect area_rect_sub = this->area_info[*surface_id];
-                  this->emit_syncdraw(main.c_str(), str_area_main.c_str(),
-                                      area_rect_main.x, area_rect_main.y,
-                                      area_rect_main.w, area_rect_main.h);
-                  this->emit_syncdraw(drawing_name, str_area_sub.c_str(),
-                                      area_rect_sub.x, area_rect_sub.y,
-                                      area_rect_sub.w, area_rect_sub.h);
-                  this->enqueue_flushdraw(state.main);
-                  this->enqueue_flushdraw(state.sub);
-               });
-         } else {
-            this->try_layout(
-               state, LayoutState{*surface_id}, [&] (LayoutState const &nl) {
-                  HMI_DEBUG("wm", "Layout: %s", kNameLayoutNormal);
-
-                  this->surface_set_layout(*surface_id);
-                  if (state.main != *surface_id) {
-                      this->deactivate(state.main);
-                  }
-                  if (state.sub != -1) {
-                      if (state.sub != *surface_id) {
-                         this->deactivate(state.sub);
-                      }
-                  }
-                  state = nl;
-
-                  // Commit for configuraton and visibility(0)
-                  this->layout_commit();
-
-                  std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
-                  compositor::rect area_rect = this->area_info[*surface_id];
-                  this->emit_syncdraw(drawing_name, str_area.c_str(),
-                                      area_rect.x, area_rect.y, area_rect.w, area_rect.h);
-                  this->enqueue_flushdraw(state.main);
-               });
-         }
-      }
-   }
-}
-
-void App::api_deactivate_surface(char const *drawing_name, const reply_func &reply) {
-   ST();
-   auto const &surface_id = this->lookup_id(drawing_name);
-
-   if (!surface_id) {
-      reply ("Surface does not exist");
-      return;
-   }
-
-   if (*surface_id == this->layers.main_surface) {
-      reply("Cannot deactivate main_surface");
-      return;
-   }
-
-   auto o_state = *this->layers.get_layout_state(*surface_id);
-
-   if (o_state == nullptr) {
-      reply("Could not find layer for surface");
-      return;
-   }
-
-   struct LayoutState &state = *o_state;
-
-   if (state.main == -1) {
-      reply("No surface active");
-      return;
-   }
-
-   // Check against main_surface, main_surface_name is the configuration item.
-   if (*surface_id == this->layers.main_surface) {
-      HMI_DEBUG("wm", "Refusing to deactivate main_surface %d", *surface_id);
-      reply(nullptr);
-      return;
-   }
-   if((state.main == *surface_id) && (state.sub == *surface_id)){
-       reply("Surface is not active");
-       return;
-   }
-   reply(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();
-               std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
-               compositor::rect area_rect = this->area_info[state.sub];
-               this->emit_syncdraw(sub.c_str(), str_area.c_str(),
-                                   area_rect.x, area_rect.y, area_rect.w, area_rect.h);
-               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();
-            std::string str_area = std::string(kNameLayoutNormal) + "." + std::string(kNameAreaFull);
-            compositor::rect area_rect = this->area_info[state.main];
-            this->emit_syncdraw(main.c_str(), str_area.c_str(),
-                                area_rect.x, area_rect.y, area_rect.w, area_rect.h);
-            this->enqueue_flushdraw(state.main);
-         });
-   }
+void App::allocateWindowResource(char const *event, char const *drawing_name,
+                                 char const *drawing_area, char const *role,
+                                 const reply_func &reply) {
+    const char* new_role = nullptr;
+    const char* new_area = nullptr;
+
+    if (0 == strcmp("activate", event)) {
+        // TODO:
+        // This process will be removed
+        // because the applications will specify role instead of drawing_name
+        {
+            if ((nullptr == role) || (0 == strcmp("", role))) {
+                HMI_DEBUG("wm", "Role is not specified, so get by using app name");
+                new_role = this->app2role_[drawing_name].c_str();
+            }
+            else {
+                new_role = role;
+            }
+            HMI_DEBUG("wm", "drawing_name:%s, new_role: %s", drawing_name, new_role);
+        }
+
+        // TODO:
+        // This process will be removed
+        // because the area "normal.full" and "normalfull" will be prohibited
+        {
+            if (nullptr == drawing_area) {
+                new_area = "normal";
+            }
+            else if (0 == strcmp("normal.full", drawing_area)) {
+                new_area = "normal";
+            }
+            else if (0 == strcmp("homescreen", new_role)) {
+                // Now homescreen specifies "normalfull"
+                new_area = "full";
+            }
+            else {
+                new_area = "normal";
+            }
+            HMI_DEBUG("wm", "drawing_area:%s, new_area: %s", drawing_area, new_area);
+        }
+    }
+    else if (0 == strcmp("deactivate", event)) {
+        // TODO:
+        // This process will be removed
+        // because the applications will specify role instead of drawing_name
+        {
+            if ((nullptr == role) || (0 == strcmp("", role))) {
+                HMI_DEBUG("wm", "Role is not specified, so get by using app name");
+                new_role = this->app2role_[drawing_name].c_str();
+            }
+            else {
+                new_role = role;
+            }
+            HMI_DEBUG("wm", "drawing_name:%s, new_role: %s", drawing_name, new_role);
+        }
+        new_area = "";
+    }
+
+    // TODO:
+    // Check role
+
+    // TODO:
+    // If event is "activate" and area is not specifid,
+    // get default value by using role
+
+    // Check Policy
+    json_object* json_in = json_object_new_object();
+    json_object* json_out = json_object_new_object();
+    json_object_object_add(json_in, "event", json_object_new_string(event));
+
+    if (nullptr != new_role) {
+        json_object_object_add(json_in, "role", json_object_new_string(new_role));
+    }
+    if (nullptr != new_area) {
+        json_object_object_add(json_in, "area", json_object_new_string(new_area));
+    }
+
+    int ret = this->pm_.checkPolicy(json_in, &json_out);
+    if (0 > ret) {
+        reply("Error checkPolicy()");
+        return;
+    }
+    else {
+        HMI_DEBUG("wm", "result: %s", json_object_get_string(json_out));
+    }
+
+    // Release json_object
+    json_object_put(json_in);
+
+    // Cat state
+    json_object* json_car;
+    if (!json_object_object_get_ex(json_out, "car", &json_car)) {
+        reply("Not found key \"car\"");
+        return;
+    }
+
+    json_bool is_changed;
+    is_changed = jh::getBoolFromJson(json_car, "is_changed");
+    if (is_changed) {
+        // Update car state
+        std::string car_state = jh::getStringFromJson(json_car, "state");
+        HMI_DEBUG("wm", "car_state: %s", car_state.c_str());
+
+        // Emit car event
+        if ("car_stop" == car_state) {
+            this->emitCarStop();
+        }
+        else if ("car_run" == car_state) {
+            this->emitCarRun();
+        }
+        else {
+            reply("Unknown car state");
+            return;
+        }
+    }
+
+    // Lamp state
+    json_object* json_lamp;
+    if (!json_object_object_get_ex(json_out, "lamp", &json_lamp)) {
+        reply("Not found key \"lamp\"");
+        return;
+    }
+
+    is_changed = jh::getBoolFromJson(json_lamp, "is_changed");
+    if (is_changed) {
+        // Update car state
+        std::string lamp_state = jh::getStringFromJson(json_lamp, "state");
+        HMI_DEBUG("wm", "lamp_state: %s", lamp_state.c_str());
+
+        // Emit lamp event
+        if ("lamp_off" == lamp_state) {
+            this->emitHeadlampOff();
+        }
+        else if ("lamp_on" == lamp_state) {
+            this->emitHeadlampOn();
+        }
+        else {
+            reply("Unknown lamp state");
+            return;
+        }
+    }
+
+    // Get category
+    const char* category = nullptr;
+    std::string str_category;
+    if (nullptr != new_role) {
+        str_category = this->pm_.roleToCategory(new_role);
+        category = str_category.c_str();
+        HMI_DEBUG("wm", "role:%s category:%s", new_role, category);
+    }
+
+    // Update layout
+    if (this->lm_.updateLayout(json_out, new_role, category)) {
+        HMI_DEBUG("wm", "Layer is changed!!");
+
+        // Allocate surface
+        this->allocateSurface();
+    }
+    else {
+        HMI_DEBUG("wm", "All layer is NOT changed!!");
+    }
+
+    // Release json_object
+    json_object_put(json_out);
+
+    return;
 }
 
 void App::enqueue_flushdraw(int surface_id) {
@@ -603,6 +464,15 @@ void App::api_enddraw(char const *drawing_name) {
 
 void App::api_ping() { this->dispatch_pending_events(); }
 
+void App::send_event(char const *evname){
+   HMI_DEBUG("wm", "%s: %s", __func__, evname);
+
+   int ret = afb_event_push(this->map_afb_event[evname], nullptr);
+   if (ret != 0) {
+      HMI_DEBUG("wm", "afb_event_push failed: %m");
+   }
+}
+
 void App::send_event(char const *evname, char const *label){
    HMI_DEBUG("wm", "%s: %s(%s)", __func__, evname, label);
 
@@ -671,7 +541,9 @@ void App::surface_removed(uint32_t surface_id) {
    } else {
       auto drawing_name = this->lookup_name(surface_id);
       if (drawing_name) {
-         this->api_deactivate_surface(drawing_name->c_str(), [](const char*){});
+         this->allocateWindowResource("deactivate", drawing_name->c_str(),
+                                      nullptr, nullptr,
+                                      [](const char*){});
       }
    }
 
@@ -705,6 +577,26 @@ void App::emit_invisible(char const *label) {
 
 void App::emit_visible(char const *label) { return emit_visible(label, true); }
 
+void App::emitHeadlampOff() {
+    // Send HeadlampOff event for all application
+    this->send_event(kListEventName[Event_HeadlampOff]);
+}
+
+void App::emitHeadlampOn() {
+    // Send HeadlampOn event for all application
+    this->send_event(kListEventName[Event_HeadlampOn]);
+}
+
+void App::emitCarStop() {
+    // Send CarStop event for all application
+    this->send_event(kListEventName[Event_CarStop]);
+}
+
+void App::emitCarRun() {
+    // Send CarRun event for all application
+    this->send_event(kListEventName[Event_CarRun]);
+}
+
 result<int> App::api_request_surface(char const *drawing_name) {
    auto lid = this->layers.get_layer_id(std::string(drawing_name));
    if (!lid) {
@@ -731,6 +623,20 @@ result<int> App::api_request_surface(char const *drawing_name) {
          HMI_DEBUG("wm", "Set main_surface id to %u", id);
       }
 
+#if 0 // @@@@@
+      // TODO:
+      // This process will be implemented in SystemManager
+      {
+          // Generate app id
+          auto id = int(this->app_id_alloc_.generate_id(drawing_name));
+          this->appname2appid_[drawing_name] = id;
+      }
+#endif
+
+      // Set map of (role, surface_id)
+      std::string role = this->app2role_[std::string(drawing_name)];
+      this->role2surfaceid_[role] = id;
+
       return Ok<int>(id);
    }
 
@@ -910,56 +816,24 @@ void App::deactivate(int id) {
    }
 }
 
-void App::deactivate_main_surface() {
-   this->layers.main_surface = -1;
-   this->api_deactivate_surface(this->layers.main_surface_name.c_str(), [](const char*){});
-}
-
-bool App::can_split(struct LayoutState const &state, int new_id) {
-   if (state.main != -1 && state.main != new_id) {
-      auto new_id_layer = this->layers.get_layer_id(new_id).value();
-      auto current_id_layer = this->layers.get_layer_id(state.main).value();
-
-      // surfaces are on separate layers, don't bother.
-      if (new_id_layer != current_id_layer) {
-         return false;
-      }
-
-      std::string const &new_id_str = this->lookup_name(new_id).value();
-      std::string const &cur_id_str = this->lookup_name(state.main).value();
-
-      auto const &layer = this->layers.get_layer(new_id_layer);
-
-      HMI_DEBUG("wm", "layer info name: %s", layer->name.c_str());
-
-      if (layer->layouts.empty()) {
-         return false;
-      }
-
-      for (auto i = layer->layouts.cbegin(); i != layer->layouts.cend(); i++) {
-         HMI_DEBUG("wm", "%d main_match '%s'", new_id_layer, i->main_match.c_str());
-         auto rem = std::regex(i->main_match);
-         if (std::regex_match(cur_id_str, rem)) {
-            // build the second one only if the first already matched
-            HMI_DEBUG("wm", "%d sub_match '%s'", new_id_layer, i->sub_match.c_str());
-            auto res = std::regex(i->sub_match);
-            if (std::regex_match(new_id_str, res)) {
-               HMI_DEBUG("wm", "layout matched!");
-               return true;
-            }
-         }
-      }
-   }
+void App::deactivate(std::string role) {
+    std::string app = this->roleToApp(role);
+    auto const &id = this->lookup_id(app.c_str());
+    if (!id) {
+      HMI_ERROR("wm", "Surface does not exist");
+      return;
+    }
+    HMI_DEBUG("wm", "Deactivate role:%s (app:%s)",
+              role.c_str(), app.c_str());
 
-   return false;
+    this->deactivate(*id);
 }
 
-void App::try_layout(struct LayoutState & /*state*/,
-                     struct LayoutState const &new_layout,
-                     std::function<void(LayoutState const &nl)> apply) {
-   if (this->policy.layout_is_valid(new_layout)) {
-      apply(new_layout);
-   }
+void App::deactivate_main_surface() {
+   this->layers.main_surface = -1;
+   this->allocateWindowResource("deactivate", this->layers.main_surface_name.c_str(),
+                                nullptr, nullptr,
+                                [](const char*){});
 }
 
 /**
@@ -982,4 +856,302 @@ void controller_hooks::surface_destination_rectangle(uint32_t /*surface_id*/,
                                                      uint32_t /*w*/,
                                                      uint32_t /*h*/) {}
 
+int App::allocateSurface() {
+    HMI_DEBUG("wm", "Call");
+
+    // Get current/previous layers
+    LayoutManager::TypeLayers crr_layers = this->lm_.getCurrentLayers();
+    LayoutManager::TypeLayers prv_layers = this->lm_.getPreviousLayers();
+
+    // Update resource of all layers
+    for (auto itr_layers = crr_layers.begin();
+         itr_layers != crr_layers.end(); ++itr_layers) {
+        // Get layer
+        std::string layer = itr_layers->first;
+        HMI_DEBUG("wm", "Update resource in %s layer", layer.c_str());
+
+        // If layout is changed, update resouce
+        if (this->lm_.isLayoutChanged(layer.c_str())) {
+            // Get current/previous layout
+            LayoutManager::TypeLayouts crr_layout = itr_layers->second;
+            LayoutManager::TypeLayouts prv_layout = prv_layers[layer];
+
+            // Get current/previous layout name
+            std::string crr_layout_name = crr_layout.begin()->first;
+            std::string prv_layout_name = prv_layout.begin()->first;
+            HMI_DEBUG("wm", "layout name crr:%s prv:%s",
+                      crr_layout_name.c_str(), prv_layout_name.c_str());
+
+            // Get current/previous ares
+            LayoutManager::TypeAreas crr_areas = crr_layout[crr_layout_name];
+            LayoutManager::TypeAreas prv_areas = prv_layout[prv_layout_name];
+
+            // Create previous displayed role list
+            std::string prv_area_name;
+            std::vector<std::string> prv_role_list;
+            for (auto itr_areas = prv_areas.begin();
+                 itr_areas != prv_areas.end(); ++itr_areas) {
+                prv_area_name = itr_areas->first;
+                prv_role_list.push_back(prv_areas[prv_area_name]["role"]);
+                HMI_DEBUG("wm", "previous displayed role:%s",
+                          prv_areas[prv_area_name]["role"].c_str());
+            }
+
+            // Allocate surface for each area
+            std::string crr_area_name;
+            std::string crr_role_name;
+            LayoutManager::TypeRolCtg crr_rol_ctg;
+            for (auto itr_areas = crr_areas.begin();
+                 itr_areas != crr_areas.end(); ++itr_areas) {
+                crr_area_name = itr_areas->first;
+                crr_rol_ctg = itr_areas->second;
+
+                // Get role of current area
+                if ("category" == crr_rol_ctg.begin()->first) {
+                    // If current area have category
+                    // Get category name
+                    std::string crr_ctg = crr_rol_ctg.begin()->second;
+
+                    // Serch relevant role fron previous displayed role list
+                    for (auto itr_role = prv_role_list.begin();
+                         itr_role != prv_role_list.end(); ++itr_role) {
+                        std::string prv_ctg = this->pm_.roleToCategory((*itr_role).c_str());
+                        if (crr_ctg == prv_ctg) {
+                            // First discovered role is set to current role
+                            crr_role_name = *itr_role;
+
+                            // Delete used role for other areas
+                            // which have same category
+                            prv_role_list.erase(itr_role);
+
+                            break;
+                        }
+                    }
+                }
+                else {
+                    crr_role_name = itr_areas->second["role"];
+                }
+                HMI_DEBUG("wm", "Allocate surface for area:%s role:%s",
+                          crr_area_name.c_str(), crr_role_name.c_str());
+
+                // Deactivate non-displayed role
+                std::string prv_role_name;
+                if (crr_layout_name == prv_layout_name) {
+                    HMI_DEBUG("wm", "Current layout is same with previous");
+
+                    // Deactivate previous role in same area
+                    // if it is different with current
+                    prv_role_name = prv_areas[crr_area_name]["role"];
+                    if (crr_role_name != prv_role_name) {
+                        this->deactivate(prv_role_name);
+                    }
+                }
+                else {
+                    HMI_DEBUG("wm", "Current layout is different with previous");
+
+                    if ("none" != prv_layout_name) {
+                        // Deactivate previous role in all area in previous layout
+                        // if it is different with current role
+                        for(auto itr = prv_areas.begin(); itr != prv_areas.end(); ++itr) {
+                            prv_role_name = itr->second["role"].c_str();
+                            if (crr_role_name != prv_role_name) {
+                                this->deactivate(prv_role_name);
+                            }
+                        }
+                    }
+                }
+
+                // Set surface for displayed role
+                if ("none" != crr_layout_name) {
+                    // If current layout is not "none",
+                    // set surface for current role
+                    this->setSurfaceSize(crr_role_name.c_str(), crr_area_name.c_str());
+
+                    // TODO:
+                    // This API is workaround.
+                    // Resource manager should manage each resource infomations
+                    // according to architecture document.
+                    this->lm_.updateArea(layer.c_str(), crr_role_name.c_str(), crr_area_name.c_str());
+                }
+            }
+        }
+    }
+    return 0;
+}
+
+void App::setSurfaceSize(const char* role, const char* area) {
+    HMI_DEBUG("wm", "role:%s area:%s", role, area);
+
+    // Get size of current area
+    compositor::rect size = this->lm_.getAreaSize(area);
+
+    // Set destination to the display rectangle
+    int surface_id = this->role2surfaceid_[role];
+    auto &s = this->controller->surfaces[surface_id];
+    s->set_destination_rectangle(size.x, size.y, size.w, size.h);
+    this->layout_commit();
+
+    // Update area information
+    this->area_info[surface_id].x = size.x;
+    this->area_info[surface_id].y = size.y;
+    this->area_info[surface_id].w = size.w;
+    this->area_info[surface_id].h = size.h;
+    HMI_DEBUG("wm", "Surface rect { %d, %d, %d, %d }",
+              size.x, size.y, size.w, size.h);
+
+    // Emit syncDraw event
+    const char* app = this->roleToApp(role).c_str();
+    this->emit_syncdraw(app, area,
+                        size.x, size.y, size.w, size.h);
+
+    // Enqueue flushDraw event
+    this->enqueue_flushdraw(surface_id);
+}
+
+std::string App::roleToApp(std::string role) {
+    HMI_DEBUG("wm", "Call");
+
+    for (auto itr = this->app2role_.begin();
+         itr != this->app2role_.end(); itr++) {
+        if (role == itr->second) {
+            return itr->first;
+        }
+    }
+    return std::string("none");
+}
+
+extern const char* kDefaultAppDb;
+int App::loadAppDb() {
+    HMI_DEBUG("wm", "Call");
+
+    // Get afm application installed dir
+    char const *afm_app_install_dir = getenv("AFM_APP_INSTALL_DIR");
+    HMI_DEBUG("wm", "afm_app_install_dir:%s", afm_app_install_dir);
+
+    std::string file_name;
+    if (!afm_app_install_dir) {
+        HMI_ERROR("wm", "AFM_APP_INSTALL_DIR is not defined");
+    }
+    else {
+        file_name = std::string(afm_app_install_dir) + std::string("/etc/app.db");
+    }
+
+    // Load app.db
+    HMI_DEBUG("wm", "file_name:%s", file_name.c_str());
+    json_object* json_obj = json_object_from_file(file_name.c_str());
+    if (nullptr == json_obj) {
+        HMI_ERROR("wm", "Could not open app.db, so use default role information");
+        json_obj = json_tokener_parse(kDefaultAppDb);
+    }
+    HMI_DEBUG("wm", "json_obj dump:%s", json_object_get_string(json_obj));
+
+    // Perse apps
+    HMI_DEBUG("wm", "Perse apps");
+    json_object* json_cfg;
+    if (!json_object_object_get_ex(json_obj, "apps", &json_cfg)) {
+        HMI_ERROR("wm", "Parse Error!!");
+        return -1;
+    }
+
+    int len = json_object_array_length(json_cfg);
+    HMI_DEBUG("wm", "json_cfg len:%d", len);
+    HMI_DEBUG("wm", "json_cfg dump:%s", json_object_get_string(json_cfg));
+
+    for (int i=0; i<len; i++) {
+        json_object* json_tmp = json_object_array_get_idx(json_cfg, i);
+        HMI_DEBUG("wm", "> json_tmp dump:%s", json_object_get_string(json_tmp));
+
+        const char* app = jh::getStringFromJson(json_tmp, "name");
+        if (nullptr == app) {
+            HMI_ERROR("wm", "Parse Error!!");
+            return -1;
+        }
+        HMI_DEBUG("wm", "> app:%s", app);
+
+        const char* role = jh::getStringFromJson(json_tmp, "role");
+        if (nullptr == role) {
+            HMI_ERROR("wm", "Parse Error!!");
+            return -1;
+        }
+        HMI_DEBUG("wm", "> role:%s", role);
+
+        this->app2role_[app] = std::string(role);
+    }
+
+    // Check
+    for(auto itr = this->app2role_.begin();
+      itr != this->app2role_.end(); ++itr) {
+        HMI_DEBUG("wm", "app:%s role:%s",
+                  itr->first.c_str(), itr->second.c_str());
+    }
+
+    // Release json_object
+    json_object_put(json_obj);
+
+    return 0;
+}
+
+
+const char* kDefaultAppDb = "{ \
+    \"apps\": [ \
+        { \
+            \"name\": \"HomeScreen\", \
+            \"role\": \"homescreen\" \
+        }, \
+        { \
+            \"name\": \"Music\", \
+            \"role\": \"music\" \
+        }, \
+        { \
+            \"name\": \"MediaPlayer\", \
+            \"role\": \"music\" \
+        }, \
+        { \
+            \"name\": \"Video\", \
+            \"role\": \"video\" \
+        }, \
+        { \
+            \"name\": \"VideoPlayer\", \
+            \"role\": \"video\" \
+        }, \
+        { \
+            \"name\": \"WebBrowser\", \
+            \"role\": \"browser\" \
+        }, \
+        { \
+            \"name\": \"Radio\", \
+            \"role\": \"radio\" \
+        }, \
+        { \
+            \"name\": \"Phone\", \
+            \"role\": \"phone\" \
+        }, \
+        { \
+            \"name\": \"Navigation\", \
+            \"role\": \"map\" \
+        }, \
+        { \
+            \"name\": \"HVAC\", \
+            \"role\": \"hvac\" \
+        }, \
+        { \
+            \"name\": \"Settings\", \
+            \"role\": \"settings\" \
+        }, \
+        { \
+            \"name\": \"Dashboard\", \
+            \"role\": \"dashboard\" \
+        }, \
+        { \
+            \"name\": \"POI\", \
+            \"role\": \"poi\" \
+        }, \
+        { \
+            \"name\": \"Mixer\", \
+            \"role\": \"mixer\" \
+        } \
+    ] \
+}";
+
+
 }  // namespace wm