| /* |
| * Copyright (C) 2011 Google 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: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT |
| * OWNER OR 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 "FlexibleBoxAlgorithm.h" |
| |
| #include "RenderBox.h" |
| |
| namespace WebCore { |
| |
| FlexItem::FlexItem(RenderBox& box, LayoutUnit flexBaseContentSize, LayoutUnit hypotheticalMainContentSize, LayoutUnit mainAxisBorderAndPadding, LayoutUnit mainAxisMargin) |
| : box(box) |
| , flexBaseContentSize(flexBaseContentSize) |
| , hypotheticalMainContentSize(hypotheticalMainContentSize) |
| , mainAxisBorderAndPadding(mainAxisBorderAndPadding) |
| , mainAxisMargin(mainAxisMargin) |
| , frozen(false) |
| { |
| ASSERT(!box.isOutOfFlowPositioned()); |
| } |
| |
| FlexLayoutAlgorithm::FlexLayoutAlgorithm(const RenderStyle& style, LayoutUnit lineBreakLength, const Vector<FlexItem>& allItems) |
| : m_style(style) |
| , m_lineBreakLength(lineBreakLength) |
| , m_allItems(allItems) |
| { |
| } |
| |
| bool FlexLayoutAlgorithm::computeNextFlexLine(size_t& nextIndex, Vector<FlexItem>& lineItems, LayoutUnit& sumFlexBaseSize, double& totalFlexGrow, double& totalFlexShrink, double& totalWeightedFlexShrink, LayoutUnit& sumHypotheticalMainSize) |
| { |
| lineItems.clear(); |
| sumFlexBaseSize = 0_lu; |
| totalFlexGrow = totalFlexShrink = totalWeightedFlexShrink = 0; |
| sumHypotheticalMainSize = 0_lu; |
| |
| bool lineHasInFlowItem = false; |
| |
| for (; nextIndex < m_allItems.size(); ++nextIndex) { |
| const auto& flexItem = m_allItems[nextIndex]; |
| ASSERT(!flexItem.box.isOutOfFlowPositioned()); |
| if (isMultiline() && sumHypotheticalMainSize + flexItem.hypotheticalMainAxisMarginBoxSize() > m_lineBreakLength && lineHasInFlowItem) |
| break; |
| lineItems.append(flexItem); |
| lineHasInFlowItem = true; |
| sumFlexBaseSize += flexItem.flexBaseMarginBoxSize(); |
| totalFlexGrow += flexItem.box.style().flexGrow(); |
| totalFlexShrink += flexItem.box.style().flexShrink(); |
| totalWeightedFlexShrink += flexItem.box.style().flexShrink() * flexItem.flexBaseContentSize; |
| sumHypotheticalMainSize += flexItem.hypotheticalMainAxisMarginBoxSize(); |
| } |
| ASSERT(lineItems.size() > 0 || nextIndex == m_allItems.size()); |
| return lineItems.size() > 0; |
| } |
| |
| } // namespace WebCore |