show keyboard keys

src/utils.rs

@@ -3,8 +3,10 @@ use std::path::PathBuf;
 use termion::event::Key;
 
 use crate::window_manager::KeyChar;
+use crate::framebuffer::{ Dimensions, Point };
 
 //use Linear A for escape, backspace, enter
+//Linear A used only internally in onscreen keyboard: 𐘎 is alt, 𐘧 is switch board, 𐘾 is ctrl
 pub fn key_to_char(key: Key) -> Option<KeyChar> {
   match key {
     Key::Char('\n') => Some(KeyChar::Press('𐘂')),
@@ -41,7 +43,6 @@ impl Substring for String {
         break;
       }
       byte_end += char_length;
-      
     }
     &self[byte_start..byte_end]
   }
@@ -146,3 +147,13 @@ pub fn is_hex(c: char) -> bool {
   HEX_CHARS.iter().position(|hc| hc == &c).is_some()
 }
 
+pub fn point_inside(point: Point, top_left: Point, size: Dimensions) -> bool {
+  let x = point[0];
+  let y = point[1];
+  let x2 = top_left[0];
+  let y2 = top_left[1];
+  let x3 = x2 + size[0];
+  let y3 = y2 + size[1];
+  x >= x2 && y >= x2 && x <= x3 && y <= y3
+}
+