Improve simulate_input (#1786)

Various common operations were not implemented.
Page up and down now correlate with page up and down movement. Home and
End now either move to the start and end of the line or to the start and
the end of the document respectively based on whether control is held.

druid-shell/src/text.rs

@@ -477,15 +477,23 @@ pub fn simulate_input<H: WinHandler + ?Sized>(
             input_handler.set_selection(Selection::caret(new_caret_index));
         }
         KbKey::ArrowLeft => {
-            let movement = Movement::Grapheme(Direction::Left);
+            let movement = if event.mods.ctrl() {
+                Movement::Word(Direction::Left)
+            } else {
+                Movement::Grapheme(Direction::Left)
+            };
             if event.mods.shift() {
                 input_handler.handle_action(Action::MoveSelecting(movement));
             } else {
                 input_handler.handle_action(Action::Move(movement));
             }
         }
         KbKey::ArrowRight => {
-            let movement = Movement::Grapheme(Direction::Right);
+            let movement = if event.mods.ctrl() {
+                Movement::Word(Direction::Right)
+            } else {
+                Movement::Grapheme(Direction::Right)
+            };
             if event.mods.shift() {
                 input_handler.handle_action(Action::MoveSelecting(movement));
             } else {
@@ -509,10 +517,20 @@ pub fn simulate_input<H: WinHandler + ?Sized>(
             }
         }
         KbKey::Backspace => {
-            input_handler.handle_action(Action::Delete(Movement::Grapheme(Direction::Upstream)));
+            let movement = if event.mods.ctrl() {
+                Movement::Word(Direction::Upstream)
+            } else {
+                Movement::Grapheme(Direction::Upstream)
+            };
+            input_handler.handle_action(Action::Delete(movement));
         }
         KbKey::Delete => {
-            input_handler.handle_action(Action::Delete(Movement::Grapheme(Direction::Downstream)));
+            let movement = if event.mods.ctrl() {
+                Movement::Word(Direction::Downstream)
+            } else {
+                Movement::Grapheme(Direction::Downstream)
+            };
+            input_handler.handle_action(Action::Delete(movement));
         }
         KbKey::Enter => {
             // I'm sorry windows, you'll get IME soon.
@@ -531,6 +549,46 @@ pub fn simulate_input<H: WinHandler + ?Sized>(
             };
             input_handler.handle_action(action);
         }
+        KbKey::Home => {
+            let movement = if event.mods.ctrl() {
+                Movement::Vertical(VerticalMovement::DocumentStart)
+            } else {
+                Movement::Line(Direction::Upstream)
+            };
+            if event.mods.shift() {
+                input_handler.handle_action(Action::MoveSelecting(movement));
+            } else {
+                input_handler.handle_action(Action::Move(movement));
+            }
+        }
+        KbKey::End => {
+            let movement = if event.mods.ctrl() {
+                Movement::Vertical(VerticalMovement::DocumentEnd)
+            } else {
+                Movement::Line(Direction::Downstream)
+            };
+            if event.mods.shift() {
+                input_handler.handle_action(Action::MoveSelecting(movement));
+            } else {
+                input_handler.handle_action(Action::Move(movement));
+            }
+        }
+        KbKey::PageUp => {
+            let movement = Movement::Vertical(VerticalMovement::PageUp);
+            if event.mods.shift() {
+                input_handler.handle_action(Action::MoveSelecting(movement));
+            } else {
+                input_handler.handle_action(Action::Move(movement));
+            }
+        }
+        KbKey::PageDown => {
+            let movement = Movement::Vertical(VerticalMovement::PageDown);
+            if event.mods.shift() {
+                input_handler.handle_action(Action::MoveSelecting(movement));
+            } else {
+                input_handler.handle_action(Action::Move(movement));
+            }
+        }
         _ => {
             handler.release_input_lock(token);
             return false;