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/*
* Copyright (C) 2018 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "LayoutState.h"
#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
#include "BlockFormattingState.h"
#include "DisplayBox.h"
#include "FloatingState.h"
#include "InlineFormattingState.h"
#include "LayoutBox.h"
#include "LayoutContainerBox.h"
#include "RenderBox.h"
#include "RuntimeEnabledFeatures.h"
#include "TableFormattingState.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
namespace Layout {
WTF_MAKE_ISO_ALLOCATED_IMPL(LayoutState);
LayoutState::LayoutState(const Document& document, const ContainerBox& rootContainer)
: m_rootContainer(makeWeakPtr(rootContainer))
{
// It makes absolutely no sense to construct a dedicated layout state for a non-formatting context root (layout would be a no-op).
ASSERT(root().establishesFormattingContext());
auto quirksMode = [&] {
if (document.inLimitedQuirksMode())
return LayoutState::QuirksMode::Limited;
if (document.inQuirksMode())
return LayoutState::QuirksMode::Yes;
return LayoutState::QuirksMode::No;
};
setQuirksMode(quirksMode());
}
LayoutState::~LayoutState() = default;
Display::Box& LayoutState::displayBoxForRootLayoutBox()
{
return ensureDisplayBoxForLayoutBox(root());
}
Display::Box& LayoutState::ensureDisplayBoxForLayoutBoxSlow(const Box& layoutBox)
{
if (layoutBox.canCacheForLayoutState(*this)) {
ASSERT(!layoutBox.cachedDisplayBoxForLayoutState(*this));
auto newBox = makeUnique<Display::Box>();
auto& newBoxPtr = *newBox;
layoutBox.setCachedDisplayBoxForLayoutState(*this, WTFMove(newBox));
return newBoxPtr;
}
return *m_layoutToDisplayBox.ensure(&layoutBox, [] {
return makeUnique<Display::Box>();
}).iterator->value;
}
FormattingState& LayoutState::formattingStateForBox(const Box& layoutBox) const
{
return establishedFormattingState(layoutBox.formattingContextRoot());
}
FormattingState& LayoutState::establishedFormattingState(const ContainerBox& formattingContextRoot) const
{
if (RuntimeEnabledFeatures::sharedFeatures().layoutFormattingContextIntegrationEnabled()) {
ASSERT(&formattingContextRoot == m_rootContainer.get());
return *m_rootInlineFormattingStateForIntegration;
}
if (auto* formattingState = m_inlineFormattingStates.get(&formattingContextRoot))
return *formattingState;
if (auto* formattingState = m_blockFormattingStates.get(&formattingContextRoot))
return *formattingState;
ASSERT(m_tableFormattingStates.contains(&formattingContextRoot));
return *m_tableFormattingStates.get(&formattingContextRoot);
}
InlineFormattingState& LayoutState::establishedInlineFormattingState(const ContainerBox& formattingContextRoot) const
{
ASSERT(formattingContextRoot.establishesInlineFormattingContext());
if (RuntimeEnabledFeatures::sharedFeatures().layoutFormattingContextIntegrationEnabled()) {
ASSERT(&formattingContextRoot == m_rootContainer.get());
return *m_rootInlineFormattingStateForIntegration;
}
return *m_inlineFormattingStates.get(&formattingContextRoot);
}
BlockFormattingState& LayoutState::establishedBlockFormattingState(const ContainerBox& formattingContextRoot) const
{
ASSERT(formattingContextRoot.establishesBlockFormattingContext());
return *m_blockFormattingStates.get(&formattingContextRoot);
}
TableFormattingState& LayoutState::establishedTableFormattingState(const ContainerBox& formattingContextRoot) const
{
ASSERT(formattingContextRoot.establishesTableFormattingContext());
return *m_tableFormattingStates.get(&formattingContextRoot);
}
FormattingState& LayoutState::ensureFormattingState(const ContainerBox& formattingContextRoot)
{
if (formattingContextRoot.establishesInlineFormattingContext())
return ensureInlineFormattingState(formattingContextRoot);
if (formattingContextRoot.establishesBlockFormattingContext())
return ensureBlockFormattingState(formattingContextRoot);
return ensureTableFormattingState(formattingContextRoot);
}
InlineFormattingState& LayoutState::ensureInlineFormattingState(const ContainerBox& formattingContextRoot)
{
ASSERT(formattingContextRoot.establishesInlineFormattingContext());
auto create = [&] {
// If the block container box that initiates this inline formatting context also establishes a block context, the floats outside of the formatting root
// should not interfere with the content inside.
// <div style="float: left"></div><div style="overflow: hidden"> <- is a non-intrusive float, because overflow: hidden triggers new block formatting context.</div>
if (formattingContextRoot.establishesBlockFormattingContext())
return makeUnique<InlineFormattingState>(FloatingState::create(*this, formattingContextRoot), *this);
// Otherwise, the formatting context inherits the floats from the parent formatting context.
// Find the formatting state in which this formatting root lives, not the one it creates and use its floating state.
auto& parentFormattingState = ensureFormattingState(formattingContextRoot.formattingContextRoot());
auto& parentFloatingState = parentFormattingState.floatingState();
return makeUnique<InlineFormattingState>(parentFloatingState, *this);
};
if (RuntimeEnabledFeatures::sharedFeatures().layoutFormattingContextIntegrationEnabled()) {
if (!m_rootInlineFormattingStateForIntegration) {
ASSERT(&formattingContextRoot == m_rootContainer.get());
m_rootInlineFormattingStateForIntegration = create();
}
return *m_rootInlineFormattingStateForIntegration;
}
return *m_inlineFormattingStates.ensure(&formattingContextRoot, create).iterator->value;
}
BlockFormattingState& LayoutState::ensureBlockFormattingState(const ContainerBox& formattingContextRoot)
{
ASSERT(formattingContextRoot.establishesBlockFormattingContext());
auto create = [&] {
return makeUnique<BlockFormattingState>(FloatingState::create(*this, formattingContextRoot), *this);
};
return *m_blockFormattingStates.ensure(&formattingContextRoot, create).iterator->value;
}
TableFormattingState& LayoutState::ensureTableFormattingState(const ContainerBox& formattingContextRoot)
{
ASSERT(formattingContextRoot.establishesTableFormattingContext());
auto create = [&] {
// Table formatting context always establishes a new floating state -and it stays empty.
return makeUnique<TableFormattingState>(FloatingState::create(*this, formattingContextRoot), *this);
};
return *m_tableFormattingStates.ensure(&formattingContextRoot, create).iterator->value;
}
void LayoutState::setViewportSize(const LayoutSize& viewportSize)
{
ASSERT(RuntimeEnabledFeatures::sharedFeatures().layoutFormattingContextIntegrationEnabled());
m_viewportSize = viewportSize;
}
LayoutSize LayoutState::viewportSize() const
{
ASSERT(RuntimeEnabledFeatures::sharedFeatures().layoutFormattingContextIntegrationEnabled());
return m_viewportSize;
}
void LayoutState::setIsIntegratedRootBoxFirstChild(bool value)
{
ASSERT(RuntimeEnabledFeatures::sharedFeatures().layoutFormattingContextIntegrationEnabled());
m_isIntegratedRootBoxFirstChild = value;
}
}
}
#endif