From 6a998c1a8b3f093d67f313e3eb129a58b3343885 Mon Sep 17 00:00:00 2001
From: Liav A <liavalb@gmail.com>
Date: Sat, 19 Feb 2022 16:55:15 +0200
Subject: [PATCH] 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.
---
 Userland/Applications/HexEditor/HexEditor.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

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);