Add support for opening files with a dialog box

This also tidies up some of the code for saving files, the dialogs are
opened in a new thread so that we can continue to render the application
in the main thread

main.odin

@@ -55,14 +55,14 @@ main :: proc() {
 	// Load files from command line arguments
 	if len(args) > 1 {
 		for filename in args {
-			open_file(&app, filename)
+			create_file_buffer(&app, filename)
 		}
 	} else {
-		open_file(&app)
+		create_file_buffer(&app)
 	}
 
 	if len(app.files) == 0 {
-		fmt.println("No files could be loaded")
+		log.error("no files could be loaded")
 		rl.CloseWindow()
 		return
 	}
@@ -79,8 +79,8 @@ main :: proc() {
 		rl.ClearBackground(app.config.colours.background)
 
 		for file in app.files {
-			if file.finished_saving && thread.is_done(file.thread) {
-				thread.destroy(file.thread)
+			if app.thread_finished && thread.is_done(app.thread) {
+				thread.destroy(app.thread)
 			}
 		}
 
@@ -263,18 +263,10 @@ main :: proc() {
 				// Handle keyboard shortcuts
 				if rl.IsKeyDown(.LEFT_CONTROL) || rl.IsKeyDown(.RIGHT_CONTROL) {
 					if rl.IsKeyPressed(.S) {
-						current_file.thread = thread.create_and_start_with_poly_data2(&app, current_file, save_file)
+						app.thread = thread.create_and_start_with_poly_data2(&app, current_file, save_file)
 					}
 					if rl.IsKeyPressed(.O) {
-						app.file_dialog_open = true
-						result := file_dialog.show_open_file_dialog()
-						app.file_dialog_open = false
-						if !result.success {
-							log.error(result.error_message)
-						}
-						defer file_dialog.destroy_result(&result)
-
-						open_file(&app, result.file_path)
+						app.thread = thread.create_and_start_with_poly_data(&app, open_file)
 					}
 					if rl.IsKeyPressed(.A) {
 						select_all(current_file)
@@ -333,7 +325,9 @@ load_fonts :: proc(app: ^App) {
 	app.line_height = app.fonts[app.current_font_index].size + 4
 }
 
-open_file :: proc(app: ^App, filename: string = "") {
+create_file_buffer :: proc(app: ^App, filename: string = "") -> (ok: bool) {
+	ok = false
+
 	buffer: File_Buffer
 	if len(filename) == 0 {
 		buffer = File_Buffer{
@@ -362,6 +356,31 @@ open_file :: proc(app: ^App, filename: string = "") {
 	}
 
 	append(&app.files, buffer)
+
+	ok = true
+
+	return
+}
+
+open_file :: proc(app: ^App) {
+	app.file_dialog_open = true
+	result: file_dialog.Result
+	result = file_dialog.show_open_file_dialog()
+	app.file_dialog_open = false
+	if !result.success {
+		log.error(result.error_message)
+		return
+	}
+	defer file_dialog.destroy_result(&result)
+
+	ok := create_file_buffer(app, result.file_path)
+	if !ok {
+		log.error("failed ot create file buffer")
+		return
+	}
+	app.active_tab+=1
+
+	return
 }
 
 get_wrapped_lines :: proc(content: string, font: ^FontConfig, max_width: f32) -> []WrappedLine {
@@ -866,7 +885,7 @@ move_cursor_to_end_of_line :: proc(file: ^File_Buffer) {
 }
 
 save_file :: proc(app: ^App, file: ^File_Buffer) {
-	file.finished_saving = false
+	app.thread_finished = false
 	if len(file.filename) == 0 {
 		app.file_dialog_open = true
 		result := file_dialog.show_save_file_dialog()
@@ -885,6 +904,6 @@ save_file :: proc(app: ^App, file: ^File_Buffer) {
 		log.error("failed to save file, \"", file.filename, "\"", sep="") // TODO: Show popup window that displays this to the user
 		return
 	}
-	file.finished_saving = true
+	app.thread_finished = true
 }
 

types.odin

@@ -34,9 +34,7 @@ File_Buffer :: struct {
 	modified: bool,
 	cursor_pos: int,
 	scroll_y: f32,
-	selection: Selection,
-	thread: ^thread.Thread,
-	finished_saving: bool
+	selection: Selection
 }
 
 Colours :: struct {
@@ -74,5 +72,7 @@ App :: struct {
 	is_dragging: bool,
 	copied_text: string,
 	config: Config,
+	thread: ^thread.Thread,
+	thread_finished: bool,
 	file_dialog_open: bool
 }