HexEditor: Add support for handling PageUp and PageDown key events

In such case, move the cursor up or down the amount of bytes per row,
multiplied by the visible content rectangle height, if possible.

1 files changed, 16 insertions, 0 deletions

diff --git a/Userland/Applications/HexEditor/HexEditor.cpp b/Userland/Applications/HexEditor/HexEditor.cpp
index 7d9b7f60d3..62d292c485 100644
--- a/Userland/Applications/HexEditor/HexEditor.cpp
+++ b/Userland/Applications/HexEditor/HexEditor.cpp
@@ -432,6 +432,22 @@ void HexEditor::keydown_event(GUI::KeyEvent& event)
         return;
     }
 
+    if (event.key() == KeyCode::Key_PageUp) {
+        auto cursor_location_change = min(bytes_per_row() * visible_content_rect().height(), m_position);
+        if (cursor_location_change > 0) {
+            advance_cursor_backwards(cursor_location_change);
+        }
+        return;
+    }
+
+    if (event.key() == KeyCode::Key_PageDown) {
+        auto cursor_location_change = min(bytes_per_row() * visible_content_rect().height(), m_document->size() - m_position);
+        if (cursor_location_change > 0) {
+            advance_cursor_forward(cursor_location_change);
+        }
+        return;
+    }
+
     if (!is_readonly() && !event.ctrl() && !event.alt() && !event.text().is_empty()) {
         if (m_edit_mode == EditMode::Hex) {
             hex_mode_keydown_event(event);