LibWeb: Update PageView content size on page relayout

If the layout changes and the page becomes taller or shorter for some
reason, we need to update the PageView's scrollable content size.

4 files changed, 9 insertions, 0 deletions

diff --git a/Libraries/LibWeb/DOM/Document.cpp b/Libraries/LibWeb/DOM/Document.cpp
index 9bd60d24d3..0d62288c76 100644
--- a/Libraries/LibWeb/DOM/Document.cpp
+++ b/Libraries/LibWeb/DOM/Document.cpp
@@ -245,6 +245,8 @@ void Document::layout()
     }
     m_layout_root->layout();
     m_layout_root->set_needs_display();
+
+    frame()->page().client().page_did_layout();
 }
 
 void Document::update_style()
diff --git a/Libraries/LibWeb/Page.h b/Libraries/LibWeb/Page.h
index 32a2e57d7c..5d2967abf7 100644
--- a/Libraries/LibWeb/Page.h
+++ b/Libraries/LibWeb/Page.h
@@ -84,6 +84,7 @@ public:
     virtual void page_did_request_scroll_to_anchor([[maybe_unused]] const String& fragment) { }
     virtual void page_did_invalidate(const Gfx::IntRect&) { }
     virtual void page_did_change_favicon(const Gfx::Bitmap&) { }
+    virtual void page_did_layout() { }
 };
 
 }
diff --git a/Libraries/LibWeb/PageView.cpp b/Libraries/LibWeb/PageView.cpp
index 24c8d9a658..4230183ad1 100644
--- a/Libraries/LibWeb/PageView.cpp
+++ b/Libraries/LibWeb/PageView.cpp
@@ -66,6 +66,11 @@ PageView::~PageView()
 {
 }
 
+void PageView::page_did_layout()
+{
+    set_content_size(layout_root()->size().to_int_size());
+}
+
 void PageView::page_did_change_title(const String& title)
 {
     if (on_title_change)
diff --git a/Libraries/LibWeb/PageView.h b/Libraries/LibWeb/PageView.h
index f57f5f0f8a..8dec382d94 100644
--- a/Libraries/LibWeb/PageView.h
+++ b/Libraries/LibWeb/PageView.h
@@ -108,6 +108,7 @@ private:
     virtual void page_did_request_scroll_to_anchor(const String& fragment) override;
     virtual void page_did_invalidate(const Gfx::IntRect&) override;
     virtual void page_did_change_favicon(const Gfx::Bitmap&) override;
+    virtual void page_did_layout() override;
 
     void layout_and_sync_size();