Extract app status planning into app core

src/app.cpp

@@ -5,6 +5,7 @@
 #include "node_dialog_open.h"
 #include "node_progress_bar.h"
 #include "mp4enc.h"
+#include "app_core/app_status.h"
 #include "app_core/document_recording.h"
 #include "app_core/document_route.h"
 #include "app_core/document_session.h"
@@ -682,9 +683,8 @@ void App::update_memory_usage(size_t bytes)
 {
     if (auto txt = layout[main_id]->find<NodeText>("txt-memory"))
     {
-        static char buffer[128];
-        sprintf(buffer, "History memory: %.2f Mb", bytes / 1024.f / 1024.f);
-        txt->set_text(buffer);
+        const auto label = pp::app::make_history_memory_label(bytes);
+        txt->set_text(label.c_str());
     }
 }
 
@@ -692,32 +692,30 @@ void App::update_rec_frames()
 {
     if (auto txt = layout[main_id]->find<NodeText>("txt-rec"))
     {
-        if (rec_running && Canvas::I->m_encoder)
-        {
-            static char buffer[128];
-            sprintf(buffer, "Recorded %d frames", Canvas::I->m_encoder->frames_count());
-            txt->set_text(buffer);
-        }
-        else
-        {
-            txt->set_text("");
-        }
+        const auto label = pp::app::make_recording_frame_label(
+            rec_running,
+            Canvas::I->m_encoder != nullptr,
+            Canvas::I->m_encoder ? Canvas::I->m_encoder->frames_count() : 0);
+        txt->set_text(label.text.c_str());
     }
 }
 
 int App::res_from_index(int i)
 {
-    return res_map[i];
+    const auto resolution = pp::app::display_resolution_from_index(i);
+    return resolution ? resolution.value() : pp::app::document_resolution_values.front();
 }
 
 int App::res_to_index(int res)
 {
-    return (int)std::distance(res_map.begin(), std::find(res_map.begin(), res_map.end(), res));
+    const auto index = pp::app::document_resolution_to_index(res);
+    return index ? static_cast<int>(index.value()) : static_cast<int>(pp::app::document_resolution_values.size());
 }
 
 std::string App::res_to_string(int res)
 {
-    return res_map_str[res_to_index(res)];
+    const auto label = pp::app::document_resolution_label(res);
+    return label ? std::string(label.value()) : std::string("unknown");
 }
 
 void App::renderdoc_frame_start()