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LibWeb: Give FormattingState a reference to its root state

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FormattingStates can have parents, in case we're performing nested
layouts to determine something's intrinsic size. In those cases, it will
soon be useful to find the outermost (root) state.
This commit is contained in:
Andreas Kling 2022-03-18 12:31:26 +01:00
parent 60c781ebc7
commit d3932b5880
1 changed files with 15 additions and 1 deletions
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16
Userland/Libraries/LibWeb/Layout/FormattingState.h
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@ -15,12 +15,25 @@
namespace Web::Layout {
struct FormattingState {
FormattingState() { }
FormattingState()
: m_root(*this)
{
}
explicit FormattingState(FormattingState const* parent)
: m_parent(parent)
, m_root(find_root())
{
}
FormattingState const& find_root() const
{
FormattingState const* root = this;
for (auto* state = m_parent; state; state = state->m_parent)
root = state;
return *root;
}
struct NodeState {
float content_width { 0 };
float content_height { 0 };
@ -92,6 +105,7 @@ struct FormattingState {
HashMap<NodeWithStyleAndBoxModelMetrics const*, IntrinsicSizes> mutable intrinsic_sizes;
FormattingState const* m_parent { nullptr };
FormattingState const& m_root;
};
Gfx::FloatRect absolute_content_rect(Box const&, FormattingState const&);