Add more readline shortcuts and make ^U work like readline

src/handlers/input.rs

@@ -9,11 +9,37 @@ use unicode_width::{UnicodeWidthChar, UnicodeWidthStr};
 // Handle event when the search input block is active
 pub fn handler(key: Key, app: &mut App) {
   match key {
+    Key::Ctrl('k') => {
+      app.input.drain(app.input_idx..app.input.len());
+    }
     Key::Ctrl('u') => {
+      app.input.drain(..app.input_idx);
+      app.input_idx = 0;
+      app.input_cursor_position = 0;
+    }
+    Key::Ctrl('l') => {
       app.input = vec![];
       app.input_idx = 0;
       app.input_cursor_position = 0;
     }
+    Key::Ctrl('w') => {
+      if app.input_cursor_position == 0 {
+        return;
+      }
+      let word_end = match app.input[..app.input_idx].iter().rposition(|&x| x != ' ') {
+        Some(index) => index + 1,
+        None => 0,
+      };
+      let word_start = match app.input[..word_end].iter().rposition(|&x| x == ' ') {
+        Some(index) => index + 1,
+        None => 0,
+      };
+      let deleted: String = app.input[word_start..app.input_idx].iter().collect();
+      let deleted_len: u16 = UnicodeWidthStr::width(deleted.as_str()).try_into().unwrap();
+      app.input.drain(word_start..app.input_idx);
+      app.input_idx = word_start;
+      app.input_cursor_position -= deleted_len;
+    }
     Key::Ctrl('e') => {
       app.input_idx = app.input.len();
       let input_string: String = app.input.iter().collect();
@@ -118,14 +144,87 @@ mod tests {
   }
 
   #[test]
-  fn test_input_handler_clear_input_on_ctrl_u() {
+  fn test_input_handler_clear_input_on_ctrl_l() {
+    let mut app = App::default();
+
+    app.input = str_to_vec_char("My text");
+
+    handler(Key::Ctrl('l'), &mut app);
+
+    assert_eq!(app.input, str_to_vec_char(""));
+  }
+
+  #[test]
+  fn test_input_handler_ctrl_u() {
     let mut app = App::default();
 
     app.input = str_to_vec_char("My text");
 
     handler(Key::Ctrl('u'), &mut app);
+    assert_eq!(app.input, str_to_vec_char("My text"));
+
+    app.input_cursor_position = 3;
+    app.input_idx = 3;
+    handler(Key::Ctrl('u'), &mut app);
+    assert_eq!(app.input, str_to_vec_char("text"));
+  }
+
+  #[test]
+  fn test_input_handler_ctrl_k() {
+    let mut app = App::default();
+
+    app.input = str_to_vec_char("My text");
+
+    handler(Key::Ctrl('k'), &mut app);
+    assert_eq!(app.input, str_to_vec_char(""));
+
+    app.input = str_to_vec_char("My text");
+    app.input_cursor_position = 2;
+    app.input_idx = 2;
+    handler(Key::Ctrl('k'), &mut app);
+    assert_eq!(app.input, str_to_vec_char("My"));
+
+    handler(Key::Ctrl('k'), &mut app);
+    assert_eq!(app.input, str_to_vec_char("My"));
+  }
+
+  #[test]
+  fn test_input_handler_ctrl_w() {
+    let mut app = App::default();
+
+    app.input = str_to_vec_char("My text");
+
+    handler(Key::Ctrl('w'), &mut app);
+    assert_eq!(app.input, str_to_vec_char("My text"));
+
+    app.input_cursor_position = 3;
+    app.input_idx = 3;
+    handler(Key::Ctrl('w'), &mut app);
+    assert_eq!(app.input, str_to_vec_char("text"));
+    assert_eq!(app.input_cursor_position, 0);
+    assert_eq!(app.input_idx, 0);
 
+    app.input = str_to_vec_char("    ");
+    app.input_cursor_position = 3;
+    app.input_idx = 3;
+    handler(Key::Ctrl('w'), &mut app);
+    assert_eq!(app.input, str_to_vec_char(" "));
+    assert_eq!(app.input_cursor_position, 0);
+    assert_eq!(app.input_idx, 0);
+    app.input_cursor_position = 1;
+    app.input_idx = 1;
+    handler(Key::Ctrl('w'), &mut app);
     assert_eq!(app.input, str_to_vec_char(""));
+    assert_eq!(app.input_cursor_position, 0);
+    assert_eq!(app.input_idx, 0);
+
+    app.input = str_to_vec_char("Hello there  ");
+    app.input_cursor_position = 13;
+    app.input_idx = 13;
+    handler(Key::Ctrl('w'), &mut app);
+    assert_eq!(app.input, str_to_vec_char("Hello "));
+    assert_eq!(app.input_cursor_position, 6);
+    assert_eq!(app.input_idx, 6);
   }
 
   #[test]

src/ui/help.rs

@@ -63,7 +63,6 @@ pub fn get_help_docs() -> Vec<Vec<&'static str>> {
       "Selected block",
     ],
     vec!["Play all tracks for artist", "e", "Library -> Artists"],
-    vec!["Delete entire input", "<Ctrl+u>", "Search input"],
     vec!["Search with input text", "<Enter>", "Search input"],
     vec![
       "Move cursor one space left",
@@ -75,6 +74,18 @@ pub fn get_help_docs() -> Vec<Vec<&'static str>> {
       "<Right Arrow Key>",
       "Search input",
     ],
+    vec!["Delete entire input", "<Ctrl+l>", "Search input"],
+    vec![
+      "Delete text from cursor to start of input",
+      "<Ctrl+u>",
+      "Search input",
+    ],
+    vec![
+      "Delete text from cursor to end of input",
+      "<Ctrl+k>",
+      "Search input",
+    ],
+    vec!["Delete previous word", "<Ctrl+w>", "Search input"],
     vec!["Jump to start of input", "<Ctrl+a>", "Search input"],
     vec!["Jump to end of input", "<Ctrl+e>", "Search input"],
     vec![