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LibWeb: Support inline-level padding and border properly

Here's roughly how this works:

- InlineLevelIterator keeps a nesting stack of inline-level nodes with
  box model metrics.
- When entering a node with box model metrics, we add them to the
  current "leading metrics".
- When exiting a node with box model metrics, we add them to the
  current "trailing metrics".
- Pending leading metrics are consumed by the first fragment added
  to the line.
- Pending trailing metrics are consumed by the last fragment added
  to the line.

Like before, the position of a line box fragment is the top left of its
content box. However, fragments are placed horizontally along the line
with space inserted for padding and border.

InlineNode::paint() now expands the content rect as appropriate when
painting background and borders.

Note that margins and margin collapsing is not yet implemented.

This makes the eyes on ACID2 horizontally centered. :^)
This commit is contained in:
Andreas Kling 2022-02-14 15:52:29 +01:00
parent 7d2a49eeb8
commit f2a917229a
8 changed files with 191 additions and 36 deletions

View file

@ -18,7 +18,7 @@ public:
float width() const { return m_width; }
void add_fragment(Node& layout_node, int start, int length, float width, float height, LineBoxFragment::Type = LineBoxFragment::Type::Normal);
void add_fragment(Node& layout_node, int start, int length, float leading_size, float trailing_size, float content_width, float content_height, LineBoxFragment::Type = LineBoxFragment::Type::Normal);
const NonnullOwnPtrVector<LineBoxFragment>& fragments() const { return m_fragments; }
NonnullOwnPtrVector<LineBoxFragment>& fragments() { return m_fragments; }