From 874e73e0c9ded2383a96b94266020a8279bc9a44 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Mon, 4 Jul 2022 15:20:32 +0200
Subject: [PATCH] Ladybird/WebView: Apply viewport scroll offset to mouse event
 coordinate

---
 Ladybird/WebView.cpp | 11 ++++++++---
 Ladybird/WebView.h   |  3 +++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/Ladybird/WebView.cpp b/Ladybird/WebView.cpp
index 5084ff84232..9f0b2f36fb0 100644
--- a/Ladybird/WebView.cpp
+++ b/Ladybird/WebView.cpp
@@ -337,7 +337,7 @@ void WebView::mouseMoveEvent(QMouseEvent* event)
     Gfx::IntPoint position(event->x(), event->y());
     auto buttons = get_buttons_from_qt_event(*event);
     auto modifiers = get_modifiers_from_qt_event(*event);
-    m_page_client->page().handle_mousemove(position, buttons, modifiers);
+    m_page_client->page().handle_mousemove(to_content(position), buttons, modifiers);
 }
 
 void WebView::mousePressEvent(QMouseEvent* event)
@@ -345,7 +345,7 @@ void WebView::mousePressEvent(QMouseEvent* event)
     Gfx::IntPoint position(event->x(), event->y());
     auto button = get_button_from_qt_event(*event);
     auto modifiers = get_modifiers_from_qt_event(*event);
-    m_page_client->page().handle_mousedown(position, button, modifiers);
+    m_page_client->page().handle_mousedown(to_content(position), button, modifiers);
 }
 
 void WebView::mouseReleaseEvent(QMouseEvent* event)
@@ -353,7 +353,12 @@ void WebView::mouseReleaseEvent(QMouseEvent* event)
     Gfx::IntPoint position(event->x(), event->y());
     auto button = get_button_from_qt_event(*event);
     auto modifiers = get_modifiers_from_qt_event(*event);
-    m_page_client->page().handle_mouseup(position, button, modifiers);
+    m_page_client->page().handle_mouseup(to_content(position), button, modifiers);
+}
+
+Gfx::IntPoint WebView::to_content(Gfx::IntPoint viewport_position) const
+{
+    return viewport_position.translated(horizontalScrollBar()->value(), verticalScrollBar()->value());
 }
 
 void WebView::paintEvent(QPaintEvent* event)
diff --git a/Ladybird/WebView.h b/Ladybird/WebView.h
index 418b1bbe94b..d325cc74354 100644
--- a/Ladybird/WebView.h
+++ b/Ladybird/WebView.h
@@ -10,6 +10,7 @@
 
 #include <AK/OwnPtr.h>
 #include <AK/String.h>
+#include <LibGfx/Forward.h>
 #include <QAbstractScrollArea>
 
 class HeadlessBrowserPageClient;
@@ -35,5 +36,7 @@ signals:
     void title_changed(QString);
 
 private:
+    Gfx::IntPoint to_content(Gfx::IntPoint) const;
+
     OwnPtr<HeadlessBrowserPageClient> m_page_client;
 };