fix: 修复delete键 (#47)

Signed-off-by: longjin <longjin@dragonos.org>

src/keycode.rs

@@ -6,8 +6,7 @@ use num_enum::TryFromPrimitive;
 pub enum SpecialKeycode {
     LF = b'\n',
     CR = b'\r',
-    Delete = b'\x7f',
-    BackSpace = b'\x08',
+    BackSpace = b'\x7f',
     Tab = b'\t',
 
     ESC = 0x1B,
@@ -23,13 +22,14 @@ impl Into<u8> for SpecialKeycode {
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
 #[allow(dead_code)]
 pub enum FunctionKeySuffix {
-    Up = 0x48,
-    Down = 0x50,
-    Left = 0x4B,
-    Right = 0x4D,
+    Up,
+    Down,
+    Left,
+    Right,
 
-    Home = 0x47,
-    End = 0x4F,
+    Home,
+    End,
+    Delete,
 }
 
 impl FunctionKeySuffix {
@@ -42,6 +42,7 @@ impl FunctionKeySuffix {
             FunctionKeySuffix::Right => &[0x5b, 0x43],
             FunctionKeySuffix::Home => &[0x5b, 0x48],
             FunctionKeySuffix::End => &[0x5b, 0x46],
+            FunctionKeySuffix::Delete => &[0x5b, 0x33, 0x7e],
         }
     }
 
@@ -53,9 +54,19 @@ impl FunctionKeySuffix {
             [0x5b, 0x43] => Some(FunctionKeySuffix::Right),
             [0x5b, 0x48] => Some(FunctionKeySuffix::Home),
             [0x5b, 0x46] => Some(FunctionKeySuffix::End),
+            [0x5b, 0x33, 0x7e] => Some(FunctionKeySuffix::Delete),
             _ => None,
         }
     }
+
+    pub fn should_read_more(value: &[u8]) -> bool {
+        match value.len() {
+            0 => true,
+            1 => value[0] == Self::SUFFIX_0,
+            2 => value[0] == Self::SUFFIX_0 && value[1] == 0x33,
+            _ => false,
+        }
+    }
 }
 
 impl Into<&[u8]> for FunctionKeySuffix {

src/shell/mod.rs

@@ -145,17 +145,16 @@ impl Shell {
     }
 
     fn handle_funckey(&mut self, command_index: &mut usize) {
-        let key = Self::read_char();
-        if key != FunctionKeySuffix::SUFFIX_0 {
-            return;
+        let mut keys = Vec::new();
+
+        while FunctionKeySuffix::should_read_more(&keys) {
+            keys.push(Self::read_char());
         }
-        let key1 = Self::read_char();
-        let suffix = &[key, key1];
-        // println!("suffix: {:?}", suffix);
-        let function_key = FunctionKeySuffix::try_from(suffix);
+        let function_key = FunctionKeySuffix::try_from(&keys);
         if function_key.is_none() {
             return;
         }
+
         let function_key = function_key.unwrap();
 
         match function_key {
@@ -194,6 +193,7 @@ impl Shell {
             FunctionKeySuffix::End => {
                 self.printer.end();
             }
+            FunctionKeySuffix::Delete => self.printer.delete(1),
         }
     }
 
@@ -215,7 +215,7 @@ impl Shell {
                         return 1;
                     }
 
-                    SpecialKeycode::BackSpace | SpecialKeycode::Delete => {
+                    SpecialKeycode::BackSpace => {
                         self.printer.backspace();
                     }