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test-web: Dump stacking context tree in layout test output

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This will allow us to test (and catch regressions in) stacking context
tree construction and updates, etc.
This commit is contained in:
Andreas Kling 2025-07-06 14:45:04 +02:00 • committed by Andreas Kling
commit dab1fd265d
Notes: github-actions[bot] 2025-07-09 12:38:27 +00:00
776 changed files with 2365 additions and 9 deletions
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42
Services/WebContent/ConnectionFromClient.cpp
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@ -278,8 +278,13 @@ void ConnectionFromClient::debug_request(u64 page_id, ByteString request, ByteSt
if (request == "dump-stacking-context-tree") {
if (auto* doc = page->page().top_level_browsing_context().active_document()) {
if (auto* viewport = doc->layout_node()) {
if (auto* stacking_context = viewport->paintable_box()->stacking_context())
stacking_context->dump();
auto& viewport_paintable = static_cast<Web::Painting::ViewportPaintable&>(*viewport->paintable_box());
viewport_paintable.build_stacking_context_tree_if_needed();
if (auto* stacking_context = viewport_paintable.stacking_context()) {
StringBuilder builder;
stacking_context->dump(builder);
dbgln("{}", builder.string_view());
}
}
}
return;
@ -976,6 +981,33 @@ static void append_paint_tree(Web::Page& page, StringBuilder& builder)
Web::dump_tree(builder, *layout_root->first_paintable());
}
static void append_stacking_context_tree(Web::Page& page, StringBuilder& builder)
{
auto* document = page.top_level_browsing_context().active_document();
if (!document) {
builder.append("(no DOM tree)"sv);
return;
}
document->update_layout(Web::DOM::UpdateLayoutReason::Debugging);
auto* layout_root = document->layout_node();
if (!layout_root) {
builder.append("(no layout tree)"sv);
return;
}
if (!layout_root->first_paintable()) {
builder.append("(no paint tree)"sv);
return;
}
auto& viewport_paintable = static_cast<Web::Painting::ViewportPaintable&>(*layout_root->paintable_box());
viewport_paintable.build_stacking_context_tree_if_needed();
if (auto* stacking_context = viewport_paintable.stacking_context()) {
stacking_context->dump(builder);
}
}
static void append_gc_graph(StringBuilder& builder)
{
auto gc_graph = Web::Bindings::main_thread_vm().heap().dump_graph();
@ -1008,6 +1040,12 @@ void ConnectionFromClient::request_internal_page_info(u64 page_id, WebView::Page
append_paint_tree(page->page(), builder);
}
if (has_flag(type, WebView::PageInfoType::StackingContextTree)) {
if (!builder.is_empty())
builder.append("\n"sv);
append_stacking_context_tree(page->page(), builder);
}
if (has_flag(type, WebView::PageInfoType::GCGraph)) {
if (!builder.is_empty())
builder.append("\n"sv);