@@ -0,0 +25,4 @@
+  bool (*poll_drop)(const struct bContext *C, FileHandlerType *file_handle_type);
+
+  /* List of file extensions supported by the file handler. */
+  blender::Vector<bFileExtension> file_extensions;

@@ -0,0 +2,4 @@
+
+#include "BKE_file_handler.hh"
+
+static blender::Vector<FileHandlerType *> *file_handlers = nullptr;

@@ -1455,0 +1563,4 @@
+    }
+    char_begin = char_end[0] ? char_end + 1 : char_end;
+    char_end = BLI_strchr_or_end(char_begin, char_separator);
+  }

@@ -0,0 +10,4 @@
+  return file_handlers;
+}
+
+const blender::Vector<FileHandlerType *> BKE_file_handlers()

@@ -0,0 +8,4 @@
+
+struct FileHandlerType {
+
+  char idname[OP_MAX_TYPENAME]; /* Unique name. */

@@ -0,0 +14,4 @@
+
+  char import_operator[OP_MAX_TYPENAME]; /* Import operator name. */
+
+  /* String list of file extensions supported by the file handler. */

@@ -0,0 +15,4 @@
+  char import_operator[OP_MAX_TYPENAME]; /* Import operator name. */
+
+  /* String list of file extensions supported by the file handler. */
+  char file_extensions_str[OP_MAX_TYPENAME];

@@ -0,0 +27,4 @@
+  ExtensionRNA rna_ext;
+};
+
+void BKE_file_handler_add(std::unique_ptr<FileHandlerType> file_handler);

@@ -0,0 +30,4 @@
+
+void BKE_file_handler_add(std::unique_ptr<FileHandlerType> file_handler)
+{
+

@@ -2201,0 +2321,4 @@
+  PropertyRNA *prop;
+
+  srna = RNA_def_struct(brna, "FileHandler", nullptr);
+  RNA_def_struct_ui_text(srna, "File Handler Type", "I/O File handler");

@@ -2201,0 +2348,4 @@
+  RNA_def_property_ui_text(
+      prop,
+      "Operator",
+      "Operator that can handle import files with extension in bl_file_extensions");

@@ -2201,0 +2368,4 @@
+
+  func = RNA_def_function(srna, "poll_drop", nullptr);
+  RNA_def_function_ui_description(
+      func, "If this method returns a non-null output, then the file hanlder can be used");

@@ -2201,0 +2370,4 @@
+  RNA_def_function_ui_description(
+      func, "If this method returns a non-null output, then the file hanlder can be used");
+  RNA_def_function_flag(func, FUNC_NO_SELF | FUNC_REGISTER_OPTIONAL);
+  RNA_def_function_return(func, RNA_def_boolean(func, "visible", true, "", ""));

@@ -0,0 +16,4 @@
+  /** Import operator name. */
+  char import_operator[OP_MAX_TYPENAME];
+  /** Formatted string of file extensions supported by the file handler, each extension should
+   * start with a `.` and separated by a `;`. For Example: `".blend;.ble"`. */

@@ -0,0 +7,4 @@
+
+namespace blender::tests {
+
+static FileHandlerType *file_handlers[8];

@@ -0,0 +16,4 @@
+                                  blender::Vector<std::string> expected_file_extensions)
+{
+  EXPECT_EQ(BKE_file_handlers().size(), test_number - 1);
+

@@ -0,0 +38,4 @@
+                        "File Handler Test 1",
+                        ".blender;.blend;.ble",
+                        {".blender", ".blend", ".ble"});
+  file_handler_add_test(2, "Test_FH_blender2", "File Handler Test 1", ".ble", {".ble"});

@@ -0,0 +49,4 @@
+
+TEST(file_handler, find)
+{
+