add yaml configuration

Example:

	%YAML 1.2
	---
	longpress_ms: 600
	repeat_ms: 25

	layout: latn_qwerty_us.xml

	wayland:
	  height: 185

src/core/button.rs

@@ -3,6 +3,7 @@
  * Copyright (c) 2024, Richard Acayan. All rights reserved.
  */
 
+use crate::core::Configuration;
 use crate::core::Display;
 use crate::core::Graphics;
 use crate::core::Layout;
@@ -164,7 +165,8 @@ const ANGLE_PARTS: [[usize; 4]; 16] = [
 const NO_PRESS: Option<Press> = None;
 
 impl<D: Display, K: Keyboard> Button<D, K> {
-    pub fn new(mut layout: Layout, mut kbd: K,
+    pub fn new(cfg: &Configuration,
+               mut layout: Layout, mut kbd: K,
                gfx: Arc<Mutex<Graphics<D>>>) -> Button<D, K>
     {
         kbd.change_layout(&layout);
@@ -179,8 +181,8 @@ impl<D: Display, K: Keyboard> Button<D, K> {
             modifiers: [ModState::Released; MODIFIERS_MAX],
             timers: VecDeque::with_capacity(PRESSES_MAX),
 
-            longpress: Duration::from_millis(600),
-            repeat: Duration::from_millis(25),
+            longpress: Duration::from_millis(cfg.longpress_ms()),
+            repeat: Duration::from_millis(cfg.repeat_ms()),
             r_square: 0.25,
         }
     }

src/core/layout.rs

@@ -3,8 +3,9 @@
  * Copyright (c) 2024, Richard Acayan. All rights reserved.
  */
 
+use crate::core::Configuration;
 use crate::core::Keyboard;
-use crate::core::button::ModState;
+use crate::core::ModState;
 use crate::core::expat;
 use std::cmp::Ordering;
 use std::collections::HashMap;
@@ -634,7 +635,7 @@ impl Layout {
         }
     }
 
-    pub fn load(dir: &Path, filename: &str) -> Result<Self, Error>
+    pub fn load(cfg: &Configuration) -> Result<Self, Error>
     {
         let mut layout = Layout {
             rows: Vec::new(),
@@ -645,8 +646,10 @@ impl Layout {
             text_supp: false,
         };
 
+        let dir = Path::new("/usr/share/unfettered-keyboard/layouts");
+
         let mut vec = Vec::new();
-        let path = dir.join(filename);
+        let path = dir.join(cfg.layout());
         let mut file = File::open(path)?;
         file.read_to_end(&mut vec)?;
 

src/core/mod.rs

@@ -4,6 +4,7 @@
  */
 
 mod button;
+mod config;
 mod expat;
 mod graphics;
 mod layout;
@@ -11,6 +12,7 @@ mod layout;
 pub use self::button::Button;
 pub use self::button::Keyboard;
 pub use self::button::ModState;
+pub use self::config::Configuration;
 pub use self::graphics::Display;
 pub use self::graphics::Graphics;
 pub use self::layout::Layout;