LibWeb+WebContent+UI: Support image cursors

The `cursor` property accepts a list of possible cursors, which behave
as a fallback: We use whichever cursor is the first available one. This
is a little complicated because initially, any remote images have not
loaded, so we need to use the fallback standard cursor, and then switch
to another when it loads.

So, ComputedValues stores a Vector of cursors, and then in EventHandler
we scan down that list until we find a cursor that's ready for use.

The spec defines cursors as being `<url>`, but allows for `<image>`
instead. That includes functions like `linear-gradient()`.

This commit implements image cursors in the Qt UI, but not AppKit.
This commit is contained in:
Sam Atkins 2025-02-20 12:17:29 +00:00 committed by Andreas Kling
commit bfd7ac1204
Notes: github-actions[bot] 2025-02-28 12:51:27 +00:00
20 changed files with 297 additions and 170 deletions

View file

@ -100,7 +100,7 @@ private:
virtual Gfx::IntPoint to_widget_position(Gfx::IntPoint content_position) const override;
void update_viewport_size();
void update_cursor(Gfx::StandardCursor cursor);
void update_cursor(Gfx::Cursor cursor);
void enqueue_native_event(Web::MouseEvent::Type, QSinglePointEvent const& event);