Files
ladybird/Libraries/LibWeb/Painting/NavigableContainerViewportPaintable.cpp
Andreas Kling 2ab80c9e47 LibWeb: Ensure hosted document layout is up to date before painting
When painting a navigable container (iframe/object), the hosted
document's layout may have been invalidated during the parent
document's layout pass via did_set_content_size -> set_viewport_size
-> set_needs_layout_update.

If the hosted document is not in the event loop's docs list (e.g.,
it was created during a rAF callback after the list was built), its
layout would never be re-updated, causing a VERIFY failure in
Node::paintable() which asserts layout_is_up_to_date().

Fix this by calling update_layout() on the hosted document in
NavigableContainerViewportPaintable::paint() before accessing its
paintable. This is a no-op when layout is already current.

Fixes #8297.
2026-03-20 22:55:44 -05:00

80 lines
3.1 KiB
C++

/*
* Copyright (c) 2018-2022, Andreas Kling <andreas@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/HTML/Navigable.h>
#include <LibWeb/HTML/NavigableContainer.h>
#include <LibWeb/Layout/NavigableContainerViewport.h>
#include <LibWeb/Layout/Viewport.h>
#include <LibWeb/Painting/BorderRadiusCornerClipper.h>
#include <LibWeb/Painting/DisplayList.h>
#include <LibWeb/Painting/DisplayListRecorder.h>
#include <LibWeb/Painting/NavigableContainerViewportPaintable.h>
#include <LibWeb/Painting/ViewportPaintable.h>
namespace Web::Painting {
GC_DEFINE_ALLOCATOR(NavigableContainerViewportPaintable);
GC::Ref<NavigableContainerViewportPaintable> NavigableContainerViewportPaintable::create(Layout::NavigableContainerViewport const& layout_box)
{
return layout_box.heap().allocate<NavigableContainerViewportPaintable>(layout_box);
}
NavigableContainerViewportPaintable::NavigableContainerViewportPaintable(Layout::NavigableContainerViewport const& layout_box)
: PaintableBox(layout_box)
{
}
void NavigableContainerViewportPaintable::paint(DisplayListRecordingContext& context, PaintPhase phase) const
{
if (!is_visible())
return;
PaintableBox::paint(context, phase);
if (phase == PaintPhase::Foreground) {
auto absolute_rect = this->absolute_rect();
auto clip_rect = context.rounded_device_rect(absolute_rect);
ScopedCornerRadiusClip corner_clip { context, clip_rect, normalized_border_radii_data(ShrinkRadiiForBorders::Yes) };
auto const& navigable_container = this->navigable_container();
auto* hosted_document = const_cast<DOM::Document*>(navigable_container.content_document_without_origin_check());
if (!hosted_document)
return;
// NB: The hosted document's layout may have been invalidated during the parent
// document's layout (e.g., via viewport size changes in did_set_content_size).
// Ensure it is up to date before painting.
hosted_document->update_layout(DOM::UpdateLayoutReason::HostedDocumentBeforePaint);
auto const* hosted_paint_tree = hosted_document->paintable();
if (!hosted_paint_tree)
return;
context.display_list_recorder().save();
context.display_list_recorder().add_clip_rect(clip_rect.to_type<int>());
HTML::PaintConfig paint_config;
paint_config.paint_overlay = context.should_paint_overlay();
paint_config.should_show_line_box_borders = context.should_show_line_box_borders();
auto display_list = hosted_document->record_display_list(paint_config);
context.display_list_recorder().paint_nested_display_list(display_list, context.enclosing_device_rect(absolute_rect).to_type<int>());
context.display_list_recorder().restore();
if constexpr (HIGHLIGHT_FOCUSED_FRAME_DEBUG) {
if (navigable_container.content_navigable()->is_focused()) {
context.display_list_recorder().draw_rect(clip_rect.to_type<int>(), Color::Cyan);
}
}
}
}
}