daniel/theme-setting (#87)

- Themes can be loaded from disk and built-in
- Themes can be selected in a new themes menu of the settings screen
- Some touch-ups to existing themes
- The saved theme is persisted in nvs

Reviewed-on: https://codeberg.org/cool-tech-zone/tangara-fw/pulls/87
Reviewed-by: cooljqln <cooljqln@noreply.codeberg.org>
Co-authored-by: ailurux <ailuruxx@gmail.com>
Co-committed-by: ailurux <ailuruxx@gmail.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/src/tangara/lua/lua_theme.cpp b/src/tangara/lua/lua_theme.cpp
index 5edde104..03578778 100644
--- a/src/tangara/lua/lua_theme.cpp
+++ b/src/tangara/lua/lua_theme.cpp
@@ -75,8 +75,41 @@ static auto set_theme(lua_State* L) -> int {
   return 0;
 }
 
+
+static auto load_theme(lua_State* L) -> int {
+  std::string filename = luaL_checkstring(L, -1);
+  // Set the theme filename in non-volatile storage
+  Bridge* instance = Bridge::Get(L);
+  // Load the theme using lua
+  auto status = luaL_loadfile(L, filename.c_str());
+  if (status != LUA_OK) {
+    lua_pushboolean(L, false);
+    return 1;
+  }
+  status = lua::CallProtected(L, 0, 1);
+  if (status == LUA_OK) {
+    ui::themes::Theme::instance()->Reset();
+    set_theme(L);
+    instance->services().nvs().InterfaceTheme(filename);
+    lua_pushboolean(L, true);
+  } else {
+    lua_pushboolean(L, false);
+  }
+
+  return 1;
+}
+
+static auto theme_filename(lua_State* L) -> int {
+  Bridge* instance = Bridge::Get(L);
+  auto file = instance->services().nvs().InterfaceTheme().value_or("/lua/theme_light.lua");
+  lua_pushstring(L, file.c_str());
+  return 1;
+}
+
 static const struct luaL_Reg kThemeFuncs[] = {{"set", set_theme},
                                               {"set_style", set_style},
+                                              {"load_theme", load_theme},
+                                              {"theme_filename", theme_filename},
                                               {NULL, NULL}};
 
 static auto lua_theme(lua_State* L) -> int {