Implement goto_line_start and goto_line_end

src/actions.rs

@@ -32,7 +32,7 @@ pub fn load_actions() -> HashMap<String, Action> {
         ("page_up", page_up),
         ("page_down", page_down),
         ("goto_line_start", goto_line_start),
-        ("goto_line_end_newline", goto_line_end_newline),
+        ("goto_line_end", goto_line_end),
         ("command_mode", command_mode),
         ("normal_mode", normal_mode),
         ("visual_mode", visual_mode),
@@ -81,11 +81,11 @@ pub fn page_down(state: &mut State) {
 }
 
 pub fn goto_line_start(state: &mut State) {
-    state.set_error("goto_line_start is unimplemented");
+    state.cursor.column = 0;
 }
 
-pub fn goto_line_end_newline(state: &mut State) {
-    state.set_error("goto_line_end_newline is unimplemented");
+pub fn goto_line_end(state: &mut State) {
+    state.cursor = state.buffer.cursor_at_line_end(state.cursor.line);
 }
 
 pub fn command_mode(state: &mut State) {

src/buffer.rs

@@ -270,6 +270,33 @@ impl Buffer {
             }
         }
     }
+
+    pub fn cursor_at_first_nonwhitespace(&self, line: usize) -> Cursor {
+        if let Some(line_slice) = self.text.get_line(line) {
+            let mut column = 0;
+            for c in line_slice.chars().reversed() {
+                column += 1;
+                if !c.is_whitespace() {
+                    break;
+                }
+            }
+
+            Cursor { line, column }
+        } else {
+            Cursor { line, column: 0 }
+        }
+    }
+
+    pub fn cursor_at_line_end(&self, line: usize) -> Cursor {
+        Cursor {
+            line,
+            column: self
+                .text
+                .get_line(line)
+                .map(|line| line.len_chars().saturating_sub(1))
+                .unwrap_or(0),
+        }
+    }
 }
 
 #[cfg(test)]

src/keybinds.rs

@@ -47,12 +47,12 @@ impl Default for Keybinds {
             (PageUp, page_up),
             (PageDown, page_down),
             (Home, goto_line_start),
-            (End, goto_line_end_newline),
+            (End, goto_line_end),
         ];
 
         let goto_keys = &[
             (Char('h'), goto_line_start as Action),
-            (Char('l'), goto_line_end_newline),
+            (Char('l'), goto_line_end),
         ];
 
         let normalish_keys = [