From 3a9784d0c8a50103936580a3cc16f2452b2fb34a Mon Sep 17 00:00:00 2001
From: Grant Horner <h.grant.horner@gmail.com>
Date: Tue, 21 Apr 2026 16:01:48 -0400
Subject: [PATCH] initial commit

---
 .gitignore |   3 ++
 edit.jai   | 148 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 151 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 edit.jai

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..80cab65
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+edit
+*.ttf
+.build
diff --git a/edit.jai b/edit.jai
new file mode 100644
index 0000000..4ee8517
--- /dev/null
+++ b/edit.jai
@@ -0,0 +1,148 @@
+FPS          :: 60;
+MS_PER_FRAME :: 1000 / FPS;
+
+buffer: string;
+lines: [..]String_Builder;
+line_height: int;
+
+my_font: *Simp.Dynamic_Font;
+
+window_width  := 800;
+window_height := 600;
+
+first_line := 0;
+
+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];
+    window := create_window(window_width, window_height, window_name);
+
+    my_init_fonts();
+
+    Simp.set_render_target(window);
+
+    should_quit := false;
+    prev := get_time();
+
+    assert(read_file_lines(args[1]), "Must be able to read file!");
+
+    while !should_quit {
+        reset_temporary_storage();
+
+        now := get_time();
+        dt := now - prev;
+        prev = now;
+
+        Input.update_window_events();
+
+        for event : Input.events_this_frame {
+            if event.type == .QUIT {
+                should_quit = true;
+                break;
+            }
+
+            if event.type == .KEYBOARD && event.key_pressed {
+                if event.key_code == {
+                    case .ESCAPE; should_quit = true;
+                }
+            }
+        }
+
+        Simp.clear_render_target(.0, .0, .0, 1);
+
+        render_edit_buffer();
+
+        Simp.swap_buffers(window);
+
+        now = get_time();
+        if now - prev < MS_PER_FRAME {
+            sleep_milliseconds(xx (now - prev));
+        }
+    }
+}
+
+render_edit_buffer :: () {
+    num_lines_in_screen := window_height / line_height - 1;
+    viewable_lines := array_view(lines, first_line, num_lines_in_screen);
+    Simp.set_shader_for_text();
+    color :: Vector4.{1, 1, 1, 1};
+    for line_buffer: viewable_lines {
+
+        line := builder_to_line(*line_buffer);
+
+        Simp.prepare_text(my_font, line);
+        Simp.draw_prepared_text(my_font, 5, window_height - (it_index + 1) * line_height, color);
+    }
+}
+
+builder_to_line :: (using builder: *String_Builder) -> string {
+    result_builder: String_Builder;
+    result_builder.allocator = temporary_allocator;
+
+    builder_str := builder_to_string(builder, do_reset = false,, temp);
+
+    start := 0;
+    for c: builder_str {
+        if c == #char "\t" {
+            s := string.{data=builder_str.data + start, count=(it_index + 1) - start};
+            append(*result_builder, s);
+            start = it_index + 1;
+        }
+    }
+
+    s := string.{data=builder_str.data + start, count=builder_str.count - start};
+    append(*result_builder, s);
+
+    return builder_to_string(*result_builder,, temp);
+}
+
+get_time :: () -> s64 {
+    val, ok := to_milliseconds(current_time_monotonic());
+    assert(ok, "Must be able to convert from apollo to milliseconds");
+    return val;
+}
+
+read_file_lines :: (file_path: string) -> bool {
+    file_contents, ok := read_entire_file(file_path);
+    if !ok return ok;
+
+    for lines reset(*it);
+    free(lines.data);
+    lines = [..]String_Builder.{};
+
+    lines_temp := split(file_contents, "\n");
+    defer free(lines_temp.data);
+
+    for line: lines_temp {
+        builder: String_Builder;
+        init_string_builder(*builder);
+        append(*builder, line);
+        array_add(*lines, builder);
+    }
+
+    return ok;
+}
+
+my_init_fonts :: () {
+    line_height = 16;
+    base_path := path_strip_filename(get_path_of_running_executable());
+    print("base_path: %\n", base_path);
+
+    my_font = Simp.get_font_at_size("/home/grant/.local/share/fonts/otf/BerkeleyMono/", "BerkeleyMono-Regular.otf", line_height);
+    // my_font = Simp.get_font_at_size(base_path, "Anonymous Pro.ttf", line_height);
+    assert(my_font != null);
+}
+
+#import "Basic";
+#import "File";
+#import "Math";
+#import "String";
+#import "System";
+#import "Window_Creation";
+
+Input :: #import "Input";
+Simp  :: #import "Simp";
+