can save files

edit.jai

@@ -15,6 +15,8 @@ first_line := 0;
 cursor_x := 0;
 cursor_y := 0;
 
+file_name: string;
+
 White :: Vector4.{1, 1, 1, 1};
 
 Special_Character_Lookup : [10]u8 : .[
@@ -34,8 +36,8 @@ main :: () {
     args := get_command_line_arguments();
     assert(args.count == 2, "The file name must be passed as a CLI argument");
 
-
-    window_name := ifx args.count == 1 then "edit" else args[1];
+    file_name = args[1];
+    window_name := file_name;
     window := create_window(window_width, window_height, window_name);
 
     my_init_fonts();
@@ -45,7 +47,7 @@ main :: () {
     should_quit := false;
     prev := get_time();
 
-    assert(read_file_lines(args[1]), "Must be able to read file!");
+    assert(read_file_lines(file_name), "Must be able to read file!");
 
     while !should_quit {
         reset_temporary_storage();
@@ -81,7 +83,15 @@ main :: () {
                     if !event.shift_pressed {
                         key += #char "a" - #char "A";
                     }
+
+                    if event.ctrl_pressed {
+                        if event.key_code == {
+                            case #char "S"; #through;
+                            case #char "s"; handle_save();
+                        }
+                    } else {
                         insert_character_at_cursor(cast(u8) key);
+                    }
                 } else if 33 <= event.key_code && event.key_code <= 126 {
                     // NOTE: this doesn't quite work for some keys, like ` or []
                     key := event.key_code;
@@ -149,6 +159,23 @@ insert_character_at_cursor :: (char: u8) {
     cursor_x += 1;
 }
 
+handle_save :: () {
+    out_builder: String_Builder;
+    init_string_builder(*out_builder);
+
+    for line: lines {
+        line_str := string.{count=line.count, data=line.data};
+        append(*out_builder, line_str);
+        if it_index != lines.count - 1 {
+            append(*out_builder, "\n");
+        }
+    }
+
+    content := builder_to_string(*out_builder);
+    out_file_name := tprint("%.new", file_name);
+    write_entire_file(out_file_name, content);
+}
+
 handle_window_resizes :: (window: Window_Type) {
     for Input.get_window_resizes() {
         Simp.update_window(it.window);