LibWeb+WebContent: Move scrollbar painting into WebContent

The main intention of this change is to have a consistent look and
behavior across all scrollbars, including elements with
`overflow: scroll` and `overflow: auto`, iframes, and a page.

Before:
- Page's scrollbar is painted by Browser (Qt/AppKit) using the
  corresponding UI framework style,
- Both WebContent and Browser know the scroll position offset.
- WebContent uses did_request_scroll_to() IPC call to send updates.
- Browser uses set_viewport_rect() to send updates.

After:
- Page's scrollbar is painted on WebContent side using the same style as
  currently used for elements with `overflow: scroll` and
  `overflow: auto`. A nice side effects: scrollbars are now painted for
  iframes, and page's scrollbar respects scrollbar-width CSS property.
- Only WebContent knows scroll position offset.
- did_request_scroll_to() is no longer used.
- set_viewport_rect() is changed to set_viewport_size().
This commit is contained in:
Aliaksandr Kalenik 2024-06-03 17:53:55 +03:00 committed by Andreas Kling
commit 5285e22f2a
Notes: sideshowbarker 2024-07-17 01:28:15 +09:00
30 changed files with 147 additions and 186 deletions

View file

@ -89,7 +89,7 @@ RefPtr<Gfx::Bitmap> SVGDecodedImageData::render(Gfx::IntSize size) const
{
auto bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, size).release_value_but_fixme_should_propagate_errors();
VERIFY(m_document->navigable());
m_document->navigable()->set_viewport_rect({ 0, 0, size.width(), size.height() });
m_document->navigable()->set_viewport_size(size.to_type<CSSPixels>());
m_document->update_layout();
Painting::CommandList painting_commands;