Add load system fonts experiment flag

src/app/core/common.h

@@ -44,6 +44,10 @@ class ExperimentFlags {
 
     // Use the new platform specific file dialog wrappers.
     bool kNewFileDialogWrapper = true;
+
+    // Platform specific loading of fonts from the system. Currently
+    // only supports macOS.
+    bool kLoadSystemFonts = true;
   };
 
   ExperimentFlags() = default;

src/app/core/constants.h

@@ -93,6 +93,9 @@
   ImGui::Text(text);              \
   ImGui::Separator();
 
+#define TABLE_BORDERS_RESIZABLE \
+  ImGuiTableFlags_Borders | ImGuiTableFlags_Resizable
+
 #define CLEAR_AND_RETURN_STATUS(status) \
   if (!status.ok()) {                   \
     auto temp = status;                 \

src/app/core/controller.cc

@@ -11,6 +11,7 @@
 
 #include "absl/status/status.h"
 #include "absl/strings/str_format.h"
+#include "app/core/platform/font_loader.h"
 #include "app/editor/master_editor.h"
 #include "app/gui/icons.h"
 #include "app/gui/style.h"
@@ -212,7 +213,7 @@ absl::Status Controller::CreateRenderer() {
   return absl::OkStatus();
 }
 
-absl::Status Controller::CreateGuiContext() const {
+absl::Status Controller::CreateGuiContext() {
   IMGUI_CHECKVERSION();
   ImGui::CreateContext();
 
@@ -228,6 +229,25 @@ absl::Status Controller::CreateGuiContext() const {
   ImGui_ImplSDL2_InitForSDLRenderer(window_.get(), renderer_.get());
   ImGui_ImplSDLRenderer2_Init(renderer_.get());
 
+  if (flags()->kLoadSystemFonts) {
+    LoadSystemFonts();
+  } else {
+    LoadFontFamilies();
+  }
+
+  // Set the default style
+  gui::ColorsYaze();
+
+  // Build a new ImGui frame
+  ImGui_ImplSDLRenderer2_NewFrame();
+  ImGui_ImplSDL2_NewFrame(window_.get());
+
+  return absl::OkStatus();
+}
+
+absl::Status Controller::LoadFontFamilies() const {
+  ImGuiIO &io = ImGui::GetIO();
+
   // Define constants
   static const char *KARLA_REGULAR = "assets/font/Karla-Regular.ttf";
   static const char *ROBOTO_MEDIUM = "assets/font/Roboto-Medium.ttf";
@@ -277,13 +297,6 @@ absl::Status Controller::CreateGuiContext() const {
                                  io.Fonts->GetGlyphRangesJapanese());
   }
 
-  // Set the default style
-  gui::ColorsYaze();
-
-  // Build a new ImGui frame
-  ImGui_ImplSDLRenderer2_NewFrame();
-  ImGui_ImplSDL2_NewFrame(window_.get());
-
   return absl::OkStatus();
 }
 

src/app/core/controller.h

@@ -39,7 +39,8 @@ class Controller : public ExperimentFlags {
 
   absl::Status CreateWindow();
   absl::Status CreateRenderer();
-  absl::Status CreateGuiContext() const;
+  absl::Status CreateGuiContext();
+  absl::Status LoadFontFamilies() const;
   void CloseWindow() { active_ = false; }
 
   friend int ::main(int argc, char **argv);