can edit and save files

.gitignore

@@ -1 +1,4 @@
 bin
+*.dylib
+.DS_Store
+src/src

src/main.odin

@@ -15,26 +15,24 @@ read_file :: proc(path: string) -> (string, bool) {
 }
 
 Cursor :: struct {
-	line: i32,
-	char: i32,
-}
-
-Line :: struct {
-	start: i32,
-	end: i32
+	line: int,
+	char: int,
 }
 
 font_size: f32 = 20.0
 text_height: f32
 cursor: Cursor
-content: [dynamic]u8
-lines: [dynamic]Line
+lines: [dynamic][dynamic]u8
 
 render_cursor :: proc(cursor: ^Cursor) {
-	x := cursor.char * i32(font_size / 2)
+	x := cursor.char * int(font_size / 2)
 	y := i32(font_size) * i32(cursor.line)
-	r.DrawLine(x, y, x, y + i32(text_height), r.WHITE)
-	r.DrawLine(x + 1, y, x + 1, y + i32(text_height), r.WHITE)
+	r.DrawLine(i32(x), y, i32(x), y + i32(text_height), r.WHITE)
+	r.DrawLine(i32(x) + 1, y, i32(x) + 1, y + i32(text_height), r.WHITE)
+}
+
+current_line :: proc() -> ^[dynamic]u8 {
+	return &lines[cursor.line]
 }
 
 main :: proc() {
@@ -47,7 +45,11 @@ main :: proc() {
 
 	content, _success := read_file("src/main.odin")
 
-
+	for line in strings.split_lines_iterator(&content) {
+		bs := make([dynamic]u8, 0, len(line) == 0 ? 1 : len(line) * 2)
+		append(&bs, line)
+		append(&lines, bs)
+	}
 
 	text: string
 	dirty := true
@@ -60,7 +62,7 @@ main :: proc() {
 		}
 
 		if r.IsKeyPressed(r.KeyboardKey.RIGHT) {
-			cursor.char += 1
+			cursor.char = min(int(cursor.char) + 1, len(current_line()^))
 		}
 		if r.IsKeyPressed(r.KeyboardKey.LEFT) {
 			cursor.char -= 1
@@ -71,13 +73,37 @@ main :: proc() {
 		if r.IsKeyPressed(r.KeyboardKey.DOWN) {
 			cursor.line += 1
 		}
+		if r.IsKeyPressed(r.KeyboardKey.ENTER) {
+			new_line_cap := len(current_line()) - cursor.char
+			bs := make([dynamic]u8, 0, len(current_line()) == 0 ? 1 : new_line_cap * 2)
+			if cursor.char < len(current_line()) {
+				for c, i in current_line()[cursor.char:] {
+					append(&bs, c)
+				}
+			}
+			inject_at(&lines, cursor.line + 1, bs)
+			resize(current_line(), cursor.char)
+			cursor.line += 1
+			cursor.char = 0
+		}
+		if r.IsKeyDown(r.KeyboardKey.LEFT_SUPER) && r.IsKeyPressed(r.KeyboardKey.S) {
+			builder := strings.builder_make()
+			defer strings.builder_destroy(&builder)
+			for line in lines {
+				strings.write_bytes(&builder, line[:])
+				strings.write_byte(&builder, '\n')
+			}
+			os.write_entire_file("foo.txt", transmute([]u8)strings.to_string(builder))
+			fmt.println("Wrote file!")
+		}
 		if r.IsKeyPressed(r.KeyboardKey.BACKSPACE) {
 			if cursor.line == 0 && cursor.char == 0 do continue
 			if cursor.char == 0 {
-				append(&lines[cursor.line - 1], string(lines[cursor.line][:]))
+				old_len := len(lines[cursor.line - 1])
+				append(&lines[cursor.line - 1], string(current_line()[:]))
 				ordered_remove(&lines, cursor.line)
 				cursor.line -= 1
-				cursor.char = i32(len(lines[cursor.line]))
+				cursor.char = old_len
 			} else {
 				ordered_remove(&lines[cursor.line], cursor.char - 1)
 				cursor.char -= 1
@@ -87,17 +113,17 @@ main :: proc() {
 		r.BeginDrawing()
 		r.ClearBackground(r.BLACK)
 
-		for line, line_index in lines {
-			line := line
+		for &line, line_index in lines {
+			if cap(line) == 0 {
+				reserve(&line, 1)
+			}
 			if len(line) == cap(line) {
 				reserve(&line, len(line) * 2)
 			}
-			fmt.println("Here")
 			raw_data(line)[len(line)] = 0
-			fmt.println("Here2")
 
 			cstr := strings.unsafe_string_to_cstring(string(line[:]))
-			pos := {0, font_size * f32(line_index)}
+			pos := r.Vector2{0, font_size * f32(line_index)}
 			r.DrawTextEx(font, cstr, pos, font_size, 0, r.WHITE)
 		}