Add "Select All" functionality on Ctrl+A to TextEditor

core/src/text/editor.rs

@@ -70,6 +70,8 @@ pub enum Action {
     SelectWord,
     /// Select the line at the current cursor.
     SelectLine,
+    /// Select the entire buffer.
+    SelectAll,
     /// Perform an [`Edit`].
     Edit(Edit),
     /// Click the [`Editor`] at the given [`Point`].

graphics/src/text/editor.rs

@@ -385,6 +385,27 @@ impl editor::Editor for Editor {
                     }));
                 }
             }
+            Action::SelectAll => {
+                let buffer = editor.buffer();
+                if buffer.lines.len() > 1
+                    || buffer
+                        .lines
+                        .first()
+                        .is_some_and(|line| !line.text().is_empty())
+                {
+                    let cursor = editor.cursor();
+                    editor.set_select_opt(Some(cosmic_text::Cursor {
+                        line: 0,
+                        index: 0,
+                        ..cursor
+                    }));
+
+                    editor.action(
+                        font_system.raw(),
+                        motion_to_action(Motion::DocumentEnd),
+                    );
+                }
+            }
 
             // Editing events
             Action::Edit(edit) => {

widget/src/text_editor.rs

@@ -762,6 +762,11 @@ impl Update {
                         {
                             return Some(Self::Paste);
                         }
+                        keyboard::Key::Character("a")
+                            if modifiers.command() =>
+                        {
+                            return Some(Self::Action(Action::SelectAll));
+                        }
                         _ => {}
                     }