fix: 🐛 uniffi-bindgen-cpp doesn't support WithForeign (#63)

Makefile

@@ -366,7 +366,7 @@ define UNIFFI_BINDINGS_CPP_BUILD
 	$(UNIFFI_BINDGEN_CPP) \
 		--config $(RUNTIME_FFI)/uniffi.toml \
 		--out-dir $(RUNTIME_FFI)/$(RUNTIME_FFI_UNIFFI_BINDINGS)/$(CPLUSPLUS) \
-		$(RUNTIME_FFI)/src/dotlottie_player.udl
+		$(RUNTIME_FFI)/src/dotlottie_player_cpp.udl
 	sed -i .bak 's/uint8_t/char/g' $(RUNTIME_FFI)/$(RUNTIME_FFI_UNIFFI_BINDINGS)/$(CPLUSPLUS)/*
 	cp $(RUNTIME_FFI)/emscripten_bindings.cpp $(RUNTIME_FFI)/$(RUNTIME_FFI_UNIFFI_BINDINGS)/$(CPLUSPLUS)/.
 endef

dotlottie-ffi/Cargo.toml

@@ -17,6 +17,7 @@ uniffi = { version = "0.26.0", features = ["cli"] }
 # Core runtime
 dotlottie_player = { path = "../dotlottie-rs" }
 dotlottie_fms = { path = "../dotlottie-fms" }
+cfg-if = "1.0"
 
 [build-dependencies]
 uniffi = { version = "0.26.0", features = ["build"] }

dotlottie-ffi/build.rs

@@ -37,7 +37,11 @@ fn apply_build_settings(build_settings: &BuildSettings) {
 }
 
 fn main() {
-    uniffi::generate_scaffolding("src/dotlottie_player.udl").unwrap();
+    if is_wasm_build() {
+        uniffi::generate_scaffolding("src/dotlottie_player_cpp.udl").unwrap();
+    } else {
+        uniffi::generate_scaffolding("src/dotlottie_player.udl").unwrap();
+    }
 
     // Apply build settings
     apply_build_settings(&TARGET_BUILD_SETTINGS);

dotlottie-ffi/src/dotlottie_player_cpp.udl

@@ -0,0 +1,99 @@
+namespace dotlottie_player {
+};
+
+[Trait]
+interface Observer {
+    void on_load();
+    void on_play();
+    void on_pause();
+    void on_stop();
+    void on_frame(f32 frame_no);
+    void on_render(f32 frame_no);
+    void on_loop(u32 loop_count);
+    void on_complete();
+};
+
+enum Mode {
+    "Forward",
+    "Reverse",
+    "Bounce",
+    "ReverseBounce"
+};
+
+dictionary Config {
+    boolean autoplay;
+    boolean loop_animation;
+    Mode mode;
+    f32 speed;
+    boolean use_frame_interpolation;
+    sequence<f32> segments;
+    u32 background_color;
+};
+
+dictionary ManifestTheme {
+    string id;
+    sequence<string> values;
+};
+
+dictionary ManifestThemes {
+    sequence<ManifestTheme>? value;
+};
+
+dictionary ManifestAnimation {
+    boolean? autoplay;
+    string? defaultTheme;
+    i8? direction;
+    boolean? hover;
+    string id;
+    u32? intermission;
+    boolean? loop;
+    u32? loop_count;
+    string? playMode;
+    u32? speed;
+    string? themeColor;
+};
+
+dictionary Manifest {
+    string? active_animation_id;
+    sequence<ManifestAnimation> animations;
+    string? author;
+    string? description;
+    string? generator;
+    string? keywords;
+    u32? revision;
+    ManifestThemes? themes;
+    sequence<string>? states;
+    string? version;
+};
+
+interface DotLottiePlayer {
+    constructor(Config config);
+    boolean load_animation_data([ByRef] string animation_data, u32 width, u32 height);
+    boolean load_animation_path([ByRef] string animation_path, u32 width, u32 height);
+    boolean load_dotlottie_data([ByRef] bytes file_data, u32 width, u32 height);
+    boolean load_animation([ByRef] string animation_id, u32 width, u32 height);
+    Manifest? manifest();
+    string manifest_string();
+    u64 buffer_ptr();
+    u64 buffer_len();
+    void set_config(Config config);
+    Config config();
+    f32 total_frames();
+    f32 duration();
+    f32 current_frame();
+    u32 loop_count();
+    boolean is_loaded();
+    boolean is_playing();
+    boolean is_paused();
+    boolean is_stopped();
+    boolean play();
+    boolean pause();
+    boolean stop();
+    f32 request_frame();
+    boolean set_frame(f32 no);
+    boolean render();
+    boolean resize(u32 width, u32 height);
+    void clear();
+    void subscribe(Observer observer);
+    boolean is_complete();
+};

dotlottie-ffi/src/lib.rs

@@ -1,4 +1,10 @@
 pub use dotlottie_fms::*;
 pub use dotlottie_player_core::*;
 
-uniffi::include_scaffolding!("dotlottie_player");
+cfg_if::cfg_if! {
+    if #[cfg(target_arch = "wasm32")] {
+        uniffi::include_scaffolding!("dotlottie_player_cpp");
+    } else {
+        uniffi::include_scaffolding!("dotlottie_player");
+    }
+}