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27 #include "LayoutContext.h"
29 #if ENABLE(LAYOUT_FORMATTING_CONTEXT)
31 #include "BlockFormattingContext.h"
32 #include "BlockFormattingState.h"
33 #include "InlineFormattingContext.h"
34 #include "InlineFormattingState.h"
35 #include "LayoutBox.h"
36 #include "LayoutContainer.h"
37 #include <wtf/IsoMallocInlines.h>
42 WTF_MAKE_ISO_ALLOCATED_IMPL(LayoutContext);
44 LayoutContext::LayoutContext(const Box& root)
45 : m_root(makeWeakPtr(const_cast<Box&>(root)))
49 void LayoutContext::updateLayout()
51 auto context = formattingContext(*m_root);
52 auto& state = establishedFormattingState(*m_root, *context);
53 context->layout(*this, state);
56 FormattingState& LayoutContext::formattingStateForBox(const Box& layoutBox) const
58 auto& root = layoutBox.formattingContextRoot();
59 RELEASE_ASSERT(m_formattingStates.contains(&root));
60 return *m_formattingStates.get(&root);
63 FormattingState& LayoutContext::establishedFormattingState(const Box& formattingContextRoot, const FormattingContext& context)
65 return *m_formattingStates.ensure(&formattingContextRoot, [this, &context] {
66 return context.createFormattingState(context.createOrFindFloatingState());
70 std::unique_ptr<FormattingContext> LayoutContext::formattingContext(const Box& formattingContextRoot)
72 if (formattingContextRoot.establishesBlockFormattingContext())
73 return std::make_unique<BlockFormattingContext>(formattingContextRoot, *this);
75 if (formattingContextRoot.establishesInlineFormattingContext())
76 return std::make_unique<InlineFormattingContext>(formattingContextRoot, *this);