From d14f27a428508d82f6dee9edce38713ef1c264a4 Mon Sep 17 00:00:00 2001
From: griffi-gh <prasol258@gmail.com>
Date: Mon, 25 Mar 2024 18:13:10 +0100
Subject: [PATCH] document some stuff

---
 hui-derive/src/lib.rs       |  1 +
 hui/src/frame.rs            |  3 +++
 hui/src/frame/nine_patch.rs | 14 ++++++++++++--
 hui/src/frame/point.rs      |  2 ++
 hui/src/frame/stack.rs      |  4 ++++
 5 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/hui-derive/src/lib.rs b/hui-derive/src/lib.rs
index 637b0a6..7b535bc 100644
--- a/hui-derive/src/lib.rs
+++ b/hui-derive/src/lib.rs
@@ -4,6 +4,7 @@ use proc_macro::TokenStream;
 use quote::quote;
 use syn::{parse_macro_input, DeriveInput};
 
+/// Implements `Signal` trait for the given type
 #[proc_macro_derive(Signal)]
 pub fn signal(input: TokenStream) -> TokenStream {
   let input = parse_macro_input!(input as DeriveInput);
diff --git a/hui/src/frame.rs b/hui/src/frame.rs
index 2671209..52db5a9 100644
--- a/hui/src/frame.rs
+++ b/hui/src/frame.rs
@@ -1,3 +1,5 @@
+//! modular procedural background system
+
 use glam::Vec2;
 use crate::draw::UiDrawCommandList;
 
@@ -9,6 +11,7 @@ mod impls;
 
 pub use rect::FrameRect;
 
+/// Trait for a drawable frame
 pub trait Frame {
   /// Draw the frame at the given position and size
   fn draw(&self, draw: &mut UiDrawCommandList, position: Vec2, parent_size: Vec2);
diff --git a/hui/src/frame/nine_patch.rs b/hui/src/frame/nine_patch.rs
index 1af14dd..2b686a1 100644
--- a/hui/src/frame/nine_patch.rs
+++ b/hui/src/frame/nine_patch.rs
@@ -1,16 +1,26 @@
-use glam::{vec2, UVec2, Vec2, Vec4};
+//! nine-patch frame implementation
+//!
+//! A 9-patch image is an image that can be scaled in a way that preserves the corners and edges of the image while scaling the center.
+//! This is useful for creating scalable UI elements like buttons, windows, etc.
+
+use glam::{vec2, UVec2, Vec2};
 use crate::{color, draw::{ImageHandle, UiDrawCommand}, rect::{Corners, FillColor, Rect}};
 use super::Frame;
 
+/// Represents a 9-patch image asset
 #[derive(Clone, Copy, Debug)]
 pub struct NinePatchAsset {
   pub image: ImageHandle,
-  //TODO: remove this
+  //TODO: remove this:
   pub size: (u32, u32),
   pub scalable_region: Rect,
 }
 
 //TODO allow scaling/moving corners
+
+/// A 9-patch frame
+///
+/// Can optionally be tinted with a color (works well with grayscale assets)
 #[derive(Clone, Copy, Debug)]
 pub struct NinePatchFrame {
   pub asset: NinePatchAsset,
diff --git a/hui/src/frame/point.rs b/hui/src/frame/point.rs
index 5d0660e..b5a9104 100644
--- a/hui/src/frame/point.rs
+++ b/hui/src/frame/point.rs
@@ -1,3 +1,5 @@
+//! frame-relative positioning/size
+
 use glam::{Vec2, vec2};
 use derive_more::{Add, AddAssign, Sub, SubAssign};
 use crate::layout::{Size, Size2d};
diff --git a/hui/src/frame/stack.rs b/hui/src/frame/stack.rs
index f6f6e78..5e21dee 100644
--- a/hui/src/frame/stack.rs
+++ b/hui/src/frame/stack.rs
@@ -1,7 +1,10 @@
+//! allows stacking two frames on top of each other
+
 use glam::Vec2;
 use crate::draw::UiDrawCommandList;
 use super::Frame;
 
+/// A frame that draws two frames on top of each other
 pub struct FrameStack(pub Box<dyn Frame>, pub Box<dyn Frame>);
 
 impl Frame for FrameStack {
@@ -17,6 +20,7 @@ impl Frame for FrameStack {
 }
 
 pub trait FrameStackExt: Frame {
+  /// Stack another frame on top of this one
   fn stack(self, other: impl Frame + 'static) -> FrameStack;
 }