layout: add surface id to layer mapping

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

2 files changed, 78 insertions, 2 deletions

diff --git a/src/layout.cpp b/src/layout.cpp
index 749b554..6a77cda 100644
--- a/src/layout.cpp
+++ b/src/layout.cpp
@@ -2,10 +2,46 @@
 // Created by mfritzsc on 6/27/17.
 //
 
+#include "json_helper.hpp"
 #include "layout.hpp"
 
 namespace wm {
 
+surface_id_to_layer::surface_id_to_layer(nlohmann::json const &j) {
+   DB(j);
+   if (j["type"] == "range") {
+      this->id_min = get<int>(j["first_surface_id"]);
+      this->id_max = get<int>(j["last_surface_id"]);
+   } else {
+      this->id_min = this->id_max = get<int>(j["surface_id"]);
+   }
+   this->name = j["name"].get<std::string>();
+   this->layer_id = get<int>(j["layer_id"]);
+}
 
+struct result<struct surface_id_to_layer_map> to_surface_id_to_layer_map(
+   nlohmann::json const &j) {
+   DB(j);
+   try {
+      surface_id_to_layer_map stl{};
+      std::transform(
+         std::cbegin(j), std::cend(j),
+         std::inserter(stl.mapping, stl.mapping.end()),
+         [](nlohmann::json const &j) { return surface_id_to_layer(j); });
+      for (auto i : stl.mapping) {
+         if (i.name.empty()) {
+            return Err<struct surface_id_to_layer_map>(
+               "Found mapping w/o name");
+         }
+         if (i.layer_id == -1 || i.id_min == -1 || i.id_max == -1) {
+            return Err<struct surface_id_to_layer_map>(
+               "Found invalid/unset IDs in mapping");
+         }
+      }
+      return Ok(stl);
+   } catch (std::exception &e) {
+      return Err<struct surface_id_to_layer_map>(e.what());
+   }
+}
 
 }  // namespace wm
\ No newline at end of file
diff --git a/src/layout.hpp b/src/layout.hpp
index 4ee14a7..6c60bde 100644
--- a/src/layout.hpp
+++ b/src/layout.hpp
@@ -6,10 +6,13 @@
 #define TMCAGLWM_LAYOUT_HPP
 
 #include <cstdint>
+#include <experimental/optional>
+#include <set>
 #include <string>
 
-#include <json-c/json.h>
+#include <json.hpp>
 
+#include "result.hpp"
 #include "wayland.hpp"
 
 namespace wm {
@@ -19,7 +22,7 @@ namespace wm {
 struct area {
    std::string name;
    genivi::rect rect;
-   uint32_t layer; // i.e. zorder?
+   uint32_t layer;  // i.e. zorder?
 };
 
 struct layout {
@@ -32,6 +35,43 @@ struct layout {
 
 typedef std::vector<struct layout> layouts_type;
 
+struct surface_id_to_layer {
+   int id_min = -1;
+   int id_max = -1;
+   std::string name = "";
+   int layer_id = -1;
+
+   explicit surface_id_to_layer(nlohmann::json const &j);
+
+   bool operator<(struct surface_id_to_layer const &rhs) const {
+      return this->id_max < rhs.id_max;
+   }
+};
+
+inline bool operator<(struct surface_id_to_layer const &a, int b) {
+   return a.id_max < b;
+}
+
+struct surface_id_to_layer_map {
+   typedef std::set<struct surface_id_to_layer> map_type;
+
+   map_type mapping;
+
+   std::experimental::optional<int> get_layer_for_surface(int surface_id) {
+      auto i = std::lower_bound(std::cbegin(this->mapping),
+                                std::cend(this->mapping), surface_id);
+
+      if (i != this->mapping.end()) {
+         return std::experimental::optional<int>(i->layer_id);
+      }
+
+      return std::experimental::nullopt;
+   }
+};
+
+struct result<struct surface_id_to_layer_map> to_surface_id_to_layer_map(
+   nlohmann::json const &j);
+
 }  // namespace wm
 
 #endif  // TMCAGLWM_LAYOUT_HPP