adding key '$' and '^' for moving line in table

README.md

@@ -103,6 +103,7 @@ If you want to add connections, you need to edit your config file. For more info
 | <kbd>h</kbd>, <kbd>j</kbd>, <kbd>k</kbd>, <kbd>l</kbd> | Scroll left/down/up/right |
 | <kbd>Ctrl</kbd> + <kbd>u</kbd>, <kbd>Ctrl</kbd> + <kbd>d</kbd> | Scroll up/down multiple lines |
 | <kbd>g</kbd> , <kbd>G</kbd> | Scroll to top/bottom |
+| <kbd>^</kbd>, <kbd>$</kbd> | Move to head/tail of line |
 | <kbd>H</kbd>, <kbd>J</kbd>, <kbd>K</kbd>, <kbd>L</kbd> | Extend selection by one cell left/down/up/right |
 | <kbd>y</kbd> | Copy a cell value |
 | <kbd>←</kbd>, <kbd>→</kbd> | Move focus to left/right |

src/components/command.rs

@@ -62,6 +62,16 @@ pub fn scroll_to_top_bottom(key: &KeyConfig) -> CommandText {
     )
 }
 
+pub fn move_to_head_tail_of_line(key: &KeyConfig) -> CommandText {
+    CommandText::new(
+        format!(
+            "Move to head/tail of line [{},{}]",
+            key.move_to_head_of_line, key.move_to_tail_of_line,
+        ),
+        CMD_GROUP_TABLE,
+    )
+}
+
 pub fn expand_collapse(key: &KeyConfig) -> CommandText {
     CommandText::new(
         format!("Expand/Collapse [{},{}]", key.scroll_right, key.scroll_left,),

src/components/table.rs

@@ -140,6 +140,15 @@ impl TableComponent {
             .select(Some(self.rows.len().saturating_sub(1)));
     }
 
+    fn move_to_head_of_line(&mut self) {
+        self.selected_column = 0;
+    }
+
+    fn move_to_tail_of_line(&mut self) {
+        let vertical_length = self.headers.len().saturating_sub(1);
+        self.selected_column = vertical_length;
+    }
+
     fn next_column(&mut self) {
         if self.rows.is_empty() {
             return;
@@ -522,6 +531,9 @@ impl Component for TableComponent {
         out.push(CommandInfo::new(command::extend_selection_by_one_cell(
             &self.key_config,
         )));
+        out.push(CommandInfo::new(command::move_to_head_tail_of_line(
+            &self.key_config,
+        )));
     }
 
     fn event(&mut self, key: Key) -> Result<EventState> {
@@ -546,6 +558,10 @@ impl Component for TableComponent {
         } else if key == self.key_config.scroll_to_bottom {
             self.scroll_to_bottom();
             return Ok(EventState::Consumed);
+        } else if key == self.key_config.move_to_head_of_line {
+            self.move_to_head_of_line();
+        } else if key == self.key_config.move_to_tail_of_line {
+            self.move_to_tail_of_line();
         } else if key == self.key_config.scroll_right {
             self.next_column();
             return Ok(EventState::Consumed);
@@ -779,6 +795,42 @@ mod test {
         assert!(!component.is_selected_cell(1, 3, 1));
     }
 
+    #[test]
+    fn test_move_to_head_of_line() {
+        let mut component = TableComponent::new(KeyConfig::default());
+
+        component.headers = vec!["a", "b", "c"].iter().map(|h| h.to_string()).collect();
+        component.rows = vec![
+            vec!["d", "e", "f"].iter().map(|h| h.to_string()).collect(),
+            vec!["g", "h", "i"].iter().map(|h| h.to_string()).collect(),
+        ];
+
+        // cursor returns to the top.
+        component.expand_selected_area_y(true);
+        component.expand_selected_area_y(true);
+        component.move_to_head_of_line();
+        assert_eq!(component.selected_column, 0);
+    }
+
+    #[test]
+    fn test_move_to_tail_of_line() {
+        let mut component = TableComponent::new(KeyConfig::default());
+
+        // if component does not have a header, cursor is not moved.
+        component.move_to_head_of_line();
+        assert_eq!(component.selected_column, 0);
+
+        // if component has a header, cursor is moved to tail of line.
+        component.headers = vec!["a", "b", "c"].iter().map(|h| h.to_string()).collect();
+        component.rows = vec![
+            vec!["d", "e", "f"].iter().map(|h| h.to_string()).collect(),
+            vec!["g", "h", "i"].iter().map(|h| h.to_string()).collect(),
+        ];
+
+        component.move_to_tail_of_line();
+        assert_eq!(component.selected_column, 2);
+    }
+
     #[test]
     fn test_calculate_cell_widths_when_sum_of_cell_widths_is_greater_than_table_width() {
         let mut component = TableComponent::new(KeyConfig::default());

src/config.rs

@@ -101,6 +101,8 @@ pub struct KeyConfig {
     pub scroll_up_multiple_lines: Key,
     pub scroll_to_top: Key,
     pub scroll_to_bottom: Key,
+    pub move_to_head_of_line: Key,
+    pub move_to_tail_of_line: Key,
     pub extend_selection_by_one_cell_left: Key,
     pub extend_selection_by_one_cell_right: Key,
     pub extend_selection_by_one_cell_up: Key,
@@ -140,6 +142,8 @@ impl Default for KeyConfig {
             scroll_up_multiple_lines: Key::Ctrl('u'),
             scroll_to_top: Key::Char('g'),
             scroll_to_bottom: Key::Char('G'),
+            move_to_head_of_line: Key::Char('^'),
+            move_to_tail_of_line: Key::Char('$'),
             extend_selection_by_one_cell_left: Key::Char('H'),
             extend_selection_by_one_cell_right: Key::Char('L'),
             extend_selection_by_one_cell_down: Key::Char('J'),