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LibWeb: Run IntersectionObserver steps only when needed

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Instead of updating IOs in every iteration of the HTML event loop,
we now only do it after a relayout, or after the viewport changes.
This commit is contained in:
Andreas Kling 2024-02-24 08:09:42 +01:00
parent d3f8d24abb
commit 11b4216e65
3 changed files with 8 additions and 3 deletions
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4
Userland/Libraries/LibWeb/HTML/Navigable.cpp
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@ -29,6 +29,7 @@
#include <LibWeb/HTML/TraversableNavigable.h>
#include <LibWeb/HTML/Window.h>
#include <LibWeb/HTML/WindowProxy.h>
#include <LibWeb/HighResolutionTime/TimeOrigin.h>
#include <LibWeb/Infra/Strings.h>
#include <LibWeb/Layout/Node.h>
#include <LibWeb/Loader/GeneratedPagesLoader.h>
@ -1944,6 +1945,9 @@ void Navigable::scroll_offset_did_change()
// 3. Append doc to doc’s pending scroll event targets.
doc->pending_scroll_event_targets().append(*doc);
// OPTIMIZATION: We do this here instead of in HTML::EventLoop::process() to avoid redundant work.
doc->run_the_update_intersection_observations_steps(HighResolutionTime::unsafe_shared_current_time());
}
CSSPixelRect Navigable::to_top_level_rect(CSSPixelRect const& a_rect)