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LibWeb: Separate layout tree rendering into phases

CSS defines a very specific paint order. This patch starts steering us
towards respecting that by introducing the PaintPhase enum with values:

- Background
- Border
- Foreground
- Overlay (internal overlays used by inspector)

Basically, to get the right visual result, we have to render the page
multiple times, going one phase at a time.
This commit is contained in:
Andreas Kling 2020-06-18 18:57:35 +02:00
parent abe811104f
commit cfab53903f
22 changed files with 109 additions and 95 deletions

View file

@ -40,7 +40,9 @@ public:
virtual const char* class_name() const override { return "LayoutDocument"; }
virtual void layout(LayoutMode = LayoutMode::Default) override;
virtual void render(RenderingContext&) override;
void paint_all_phases(RenderingContext&);
virtual void render(RenderingContext&, PaintPhase) override;
const LayoutRange& selection() const { return m_selection; }
LayoutRange& selection() { return m_selection; }