From 05dd26804a5ad324fbf34ca21c1792c2c3a7bd0a Mon Sep 17 00:00:00 2001
From: Grant Horner <h.grant.horner@gmail.com>
Date: Mon, 8 Dec 2025 21:18:47 -0500
Subject: [PATCH] wip raylib

---
 .gitignore           |   1 +
 src/main.odin        | 113 +++++++++++++++++++++++++++++++++++++++++++
 type_conversions.txt |  37 ++++++++++++++
 3 files changed, 151 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 src/main.odin
 create mode 100644 type_conversions.txt

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ba077a4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+bin
diff --git a/src/main.odin b/src/main.odin
new file mode 100644
index 0000000..7d69a07
--- /dev/null
+++ b/src/main.odin
@@ -0,0 +1,113 @@
+package main
+
+import "core:fmt"
+import "core:mem"
+import "core:os"
+import "core:strings"
+import utf8 "core:unicode/utf8"
+import r "vendor:raylib"
+
+read_file :: proc(path: string) -> (string, bool) {
+	content: []u8
+	success: bool
+	content, success = os.read_entire_file(path)
+	return string(content), success
+}
+
+Cursor :: struct {
+	line: i32,
+	char: i32,
+}
+
+Line :: struct {
+	start: i32,
+	end: i32
+}
+
+font_size: f32 = 20.0
+text_height: f32
+cursor: Cursor
+content: [dynamic]u8
+lines: [dynamic]Line
+
+render_cursor :: proc(cursor: ^Cursor) {
+	x := cursor.char * i32(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)
+}
+
+main :: proc() {
+	r.InitWindow(800, 600, "odit")
+	r.SetTargetFPS(60)
+	font := r.LoadFont("/Users/grant/Library/Fonts/BerkeleyMono-Regular.otf")
+	r.GuiSetFont(font)
+	two_lines_size := r.MeasureTextEx(font, "foo\nbar", font_size, 0.0)
+	text_height = two_lines_size[1] / 2
+
+	content, _success := read_file("src/main.odin")
+
+
+
+	text: string
+	dirty := true
+	for !r.WindowShouldClose() {
+		for c := r.GetCharPressed(); c != rune(0); c = r.GetCharPressed() {
+			chars, _ := utf8.encode_rune(c)
+			char := chars[0]
+			inject_at(&lines[cursor.line], cursor.char, char)
+			cursor.char += 1
+		}
+
+		if r.IsKeyPressed(r.KeyboardKey.RIGHT) {
+			cursor.char += 1
+		}
+		if r.IsKeyPressed(r.KeyboardKey.LEFT) {
+			cursor.char -= 1
+		}
+		if r.IsKeyPressed(r.KeyboardKey.UP) {
+			cursor.line -= 1
+		}
+		if r.IsKeyPressed(r.KeyboardKey.DOWN) {
+			cursor.line += 1
+		}
+		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][:]))
+				ordered_remove(&lines, cursor.line)
+				cursor.line -= 1
+				cursor.char = i32(len(lines[cursor.line]))
+			} else {
+				ordered_remove(&lines[cursor.line], cursor.char - 1)
+				cursor.char -= 1
+			}
+		}
+
+		r.BeginDrawing()
+		r.ClearBackground(r.BLACK)
+
+		for line, line_index in lines {
+			line := line
+			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)}
+			r.DrawTextEx(font, cstr, pos, font_size, 0, r.WHITE)
+		}
+
+		render_cursor(&cursor)
+
+		r.DrawFPS(10, 10)
+
+		r.EndDrawing()
+
+		free_all(context.temp_allocator)
+		dirty = false
+	}
+}
diff --git a/type_conversions.txt b/type_conversions.txt
new file mode 100644
index 0000000..fe18ca6
--- /dev/null
+++ b/type_conversions.txt
@@ -0,0 +1,37 @@
+From string to X #
+To	Action	Code
+[]u8	alias	transmute([]u8)st
+string	copy	strings.clone(st)
+cstring	copy	strings.clone_to_cstring(st)
+cstring	alias	strings.unsafe_string_to_cstring(st)
+[]rune	stream	for rune in st { ... }
+[]rune	copy	utf8.string_to_runes(st)
+[^]u8	alias	raw_data(st)
+
+From cstring to X #
+To	Action	Code
+string	alias	string(st)
+[^]u8	alias	transmute([^]u8)st
+
+From a string literal to X #
+To	Action	Code
+string	alias	string(st) or newstr: string = st
+cstring	alias	cstring(st) or newstr: cstring = st
+
+From []u8 to X #
+To	Action	Code
+string	alias	transmute(string)st
+string	alias	string(st) unless a slice literal
+[^]u8	alias	raw_data(st)
+
+From []rune to string #
+Action	Code
+copy	utf8.runes_to_string(st)
+
+From [^]u8 to cstring #
+Action	Code
+alias	cstring(st)
+
+From [^]u8 and length int to string #
+Action	Code
+alias	strings.string_from_ptr(ptr, length)