Implement dragging and dropping images directly from the browser to download them and import them

src/Autoload/OpenSave.gd

@@ -53,7 +53,8 @@ func handle_loading_file(file: String) -> void:
 		var apng_res := AImgIOAPNGImporter.load_from_file(file)
 		if apng_res[0] == null:
 			# No error - this is an APNG!
-			handle_loading_aimg(file, apng_res[1])
+			if typeof(apng_res[1]) == TYPE_ARRAY:
+				handle_loading_aimg(file, apng_res[1])
 			return
 		# Attempt to load as a regular image.
 		var image := Image.load_from_file(file)
@@ -91,6 +92,22 @@ func add_import_option(import_name: StringName, import_scene: PackedScene) -> in
 	return id
 
 
+## Mostly used for downloading images from the Internet. Tries multiple file extensions
+## in case the extension of the file is wrong, which is common for images on the Internet.
+func load_image_from_buffer(buffer: PackedByteArray) -> Image:
+	var image := Image.new()
+	var err := image.load_png_from_buffer(buffer)
+	if err != OK:
+		err = image.load_jpg_from_buffer(buffer)
+		if err != OK:
+			err = image.load_webp_from_buffer(buffer)
+			if err != OK:
+				err = image.load_tga_from_buffer(buffer)
+				if err != OK:
+					image.load_bmp_from_buffer(buffer)
+	return image
+
+
 func handle_loading_image(file: String, image: Image) -> void:
 	if Global.projects.size() <= 1 and Global.current_project.is_empty():
 		open_image_as_new_tab(file, image)

src/Main.gd

@@ -384,6 +384,8 @@ func _notification(what: int) -> void:
 
 func _on_files_dropped(files: PackedStringArray) -> void:
 	for file in files:
+		if not FileAccess.file_exists(file):
+			$ImageRequest.request(file)
 		OpenSave.handle_loading_file(file)
 	if splash_dialog.visible:
 		splash_dialog.hide()
@@ -575,3 +577,12 @@ func _exit_tree() -> void:
 	Global.config_cache.set_value("view_menu", "show_guides", Global.show_guides)
 	Global.config_cache.set_value("view_menu", "show_mouse_guides", Global.show_mouse_guides)
 	Global.config_cache.save(Global.CONFIG_PATH)
+
+
+func _on_image_request_request_completed(
+	_result: int, _response_code: int, _headers: PackedStringArray, body: PackedByteArray
+) -> void:
+	var image := OpenSave.load_image_from_buffer(body)
+	if image.is_empty():
+		return
+	OpenSave.handle_loading_image(OS.get_system_dir(OS.SYSTEM_DIR_DESKTOP), image)

src/Main.tscn

@@ -102,6 +102,8 @@ visible = false
 [node name="RightCursor" type="Sprite2D" parent="."]
 visible = false
 
+[node name="ImageRequest" type="HTTPRequest" parent="."]
+
 [connection signal="files_selected" from="Dialogs/OpenSprite" to="." method="_on_OpenSprite_files_selected"]
 [connection signal="visibility_changed" from="Dialogs/OpenSprite" to="." method="_on_open_sprite_visibility_changed"]
 [connection signal="file_selected" from="Dialogs/SaveSprite" to="." method="_on_SaveSprite_file_selected"]
@@ -117,3 +119,4 @@ visible = false
 [connection signal="visibility_changed" from="Dialogs/QuitAndSaveDialog" to="." method="_can_draw_true"]
 [connection signal="visibility_changed" from="Dialogs/ErrorDialog" to="." method="_can_draw_true"]
 [connection signal="visibility_changed" from="Dialogs/BackupConfirmation" to="." method="_on_backup_confirmation_visibility_changed"]
+[connection signal="request_completed" from="ImageRequest" to="." method="_on_image_request_request_completed"]

src/UI/ExtensionExplorer/Entry/ExtensionEntry.gd

@@ -56,18 +56,9 @@ func _on_ImageRequest_request_completed(
 ) -> void:
 	# Update the received image
 	thumbnail_request.queue_free()
-	var image := Image.new()
-	# for images on internet there is a hagh chance that extension is wrong
-	# so check all of them even if they give error
-	var err := image.load_png_from_buffer(body)
-	if err != OK:
-		var err_a := image.load_jpg_from_buffer(body)
-		if err_a != OK:
-			var err_b := image.load_webp_from_buffer(body)
-			if err_b != OK:
-				var err_c := image.load_tga_from_buffer(body)
-				if err_c != OK:
-					image.load_bmp_from_buffer(body)
+	var image := OpenSave.load_image_from_buffer(body)
+	if image.is_empty():
+		return
 	var texture := ImageTexture.create_from_image(image)
 	small_picture.texture_normal = texture
 	small_picture.pressed.connect(enlarge_thumbnail.bind(texture))