add js save dialog

webgl/src/main.cpp

@@ -14,15 +14,20 @@ GLFWwindow* wnd;
 float theta = 0;
 glm::vec2 g_cursor_pos;
 
+template<typename F>
 class TaskCallback
 {
-    std::function<void(std::string)> fn;
+    std::function<F> fn;
 public:
     template<typename T> TaskCallback(T callback) : fn(callback) {}
     void call(const std::string& tmp_file_path)
     {
         fn(tmp_file_path);
     }
+    void call(bool success)
+    {
+        fn(success);
+    }
     TaskCallback()
     {
         printf("callback created\n");
@@ -33,36 +38,64 @@ public:
     }
 };
 
-void TaskCallback_call(uintptr_t tc, std::string tmp_file_path)
+void TaskCallback_open_call(uintptr_t tc, std::string tmp_file_path)
 {
-    auto x = reinterpret_cast<TaskCallback*>(tc);
+    auto x = reinterpret_cast<TaskCallback<void(std::string)>*>(tc);
     x->call(tmp_file_path);
 }
-
-void TaskCallback_delete(uintptr_t tc)
+void TaskCallback_open_delete(uintptr_t tc)
 {
-    auto x = reinterpret_cast<TaskCallback*>(tc);
+    auto x = reinterpret_cast<TaskCallback<void(std::string)>*>(tc);
+    delete x;
+}
+void TaskCallback_save_call(uintptr_t tc, bool success)
+{
+    auto x = reinterpret_cast<TaskCallback<void(bool)>*>(tc);
+    x->call(success);
+}
+void TaskCallback_save_delete(uintptr_t tc)
+{
+    auto x = reinterpret_cast<TaskCallback<void(bool)>*>(tc);
     delete x;
 }
 
+std::string UtilityGetString(uintptr_t s)
+{
+    return *reinterpret_cast<std::string*>(s);
+}
+
 EMSCRIPTEN_BINDINGS(TaskCallback_bind) {
-    class_<TaskCallback>("TaskCallback");
-    function("TaskCallback_call", &TaskCallback_call);
-    function("TaskCallback_delete", &TaskCallback_delete);
+    class_<TaskCallback<void(std::string)>>("TaskCallbackOpen");
+    class_<TaskCallback<void(bool)>>("TaskCallbackSave");
+    function("TaskCallback_save_call", &TaskCallback_save_call);
+    function("TaskCallback_save_delete", &TaskCallback_save_delete);
+    function("TaskCallback_open_call", &TaskCallback_open_call);
+    function("TaskCallback_open_delete", &TaskCallback_open_delete);
+    function("UtilityGetString", &UtilityGetString);
 }
 
 extern "C" {
-extern void js_pick_file(TaskCallback* tc);
+extern void js_pick_file(TaskCallback<void(std::string)>* tc);
+extern void js_pick_file_save(std::string path, std::string name, TaskCallback<void(bool)>* tc);
 }
 
 void webgl_pick_file(std::function<void(std::string)> callback)
 {
-    js_pick_file(new TaskCallback([callback](std::string tmp_file_path){ 
+    js_pick_file(new TaskCallback<void(std::string)>([callback](std::string tmp_file_path){ 
         printf("callback called: %s\n", tmp_file_path.c_str());
         callback(tmp_file_path);
     }));
 }
 
+void webgl_pick_file_save(const std::string& path, 
+    const std::string& name, std::function<void(bool)> callback)
+{
+    js_pick_file_save(path, name, new TaskCallback<void(bool)>([callback](bool success){ 
+        printf("save callback called: %s\n", success ? "ok" : "failed");
+        callback(success);
+    }));
+}
+
 void main_loop()
 {
     app.render_thread_tick();