| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "core/layout/ng/layout_ng_block_flow.h" |
| |
| #include "core/layout/LayoutAnalyzer.h" |
| #include "core/layout/ng/ng_constraint_space.h" |
| #include "core/layout/ng/ng_fragment.h" |
| |
| namespace blink { |
| |
| LayoutNGBlockFlow::LayoutNGBlockFlow(Element* element) |
| : LayoutBlockFlow(element) {} |
| |
| bool LayoutNGBlockFlow::isOfType(LayoutObjectType type) const { |
| return type == LayoutObjectNGBlockFlow || LayoutBlockFlow::isOfType(type); |
| } |
| |
| void LayoutNGBlockFlow::layoutBlock(bool relayoutChildren) { |
| LayoutAnalyzer::BlockScope analyzer(*this); |
| |
| RefPtr<NGConstraintSpace> constraint_space = |
| NGConstraintSpace::CreateFromLayoutObject(*this); |
| |
| // TODO(layout-dev): This should be created in the constructor once instead. |
| // There is some internal state which needs to be cleared between layout |
| // passes (probably FirstChild(), etc). |
| m_box = new NGBlockNode(this); |
| |
| RefPtr<NGLayoutResult> result = m_box->Layout(constraint_space.get()); |
| |
| if (isOutOfFlowPositioned()) { |
| // In legacy layout, abspos differs from regular blocks in that abspos |
| // blocks position themselves in their own layout, instead of getting |
| // positioned by their parent. So it we are a positioned block in a legacy- |
| // layout containing block, we have to emulate this positioning. |
| // Additionally, until we natively support abspos in LayoutNG, this code |
| // will also be reached though the layoutPositionedObjects call in |
| // NGBlockNode::CopyFragmentDataToLayoutBox. |
| LogicalExtentComputedValues computedValues; |
| computeLogicalWidth(computedValues); |
| setLogicalLeft(computedValues.m_position); |
| computeLogicalHeight(logicalHeight(), logicalTop(), computedValues); |
| setLogicalTop(computedValues.m_position); |
| } |
| |
| for (auto& descendant : result->OutOfFlowDescendants()) |
| descendant->UseOldOutOfFlowPositioning(); |
| clearNeedsLayout(); |
| } |
| |
| } // namespace blink |