| /* |
| * Copyright (C) 2019 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 "TableFormattingContext.h" |
| |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| |
| #include "DisplayBox.h" |
| #include "InlineFormattingState.h" |
| #include "LayoutContext.h" |
| #include "LayoutDescendantIterator.h" |
| #include "LayoutInitialContainingBlock.h" |
| #include "TableFormattingState.h" |
| |
| namespace WebCore { |
| namespace Layout { |
| |
| LayoutUnit TableFormattingContext::Geometry::cellHeigh(const ContainerBox& cellBox) const |
| { |
| ASSERT(cellBox.isInFlow()); |
| return std::max(computedHeight(cellBox).valueOr(0_lu), contentHeightForFormattingContextRoot(cellBox)); |
| } |
| |
| Edges TableFormattingContext::Geometry::computedCellBorder(const TableGrid::Cell& cell) const |
| { |
| auto& cellBox = cell.box(); |
| auto border = computedBorder(cellBox); |
| auto collapsedBorder = m_grid.collapsedBorder(); |
| if (!collapsedBorder) |
| return border; |
| |
| // We might want to cache these collapsed borders on the grid. |
| auto cellPosition = cell.position(); |
| // Collapsed border left from table and adjacent cells. |
| if (!cellPosition.column) |
| border.horizontal.left = collapsedBorder->horizontal.left / 2; |
| else { |
| auto adjacentBorderRight = computedBorder(m_grid.slot({ cellPosition.column - 1, cellPosition.row })->cell().box()).horizontal.right; |
| border.horizontal.left = std::max(border.horizontal.left, adjacentBorderRight) / 2; |
| } |
| // Collapsed border right from table and adjacent cells. |
| if (cellPosition.column == m_grid.columns().size() - 1) |
| border.horizontal.right = collapsedBorder->horizontal.right / 2; |
| else { |
| auto adjacentBorderLeft = computedBorder(m_grid.slot({ cellPosition.column + 1, cellPosition.row })->cell().box()).horizontal.left; |
| border.horizontal.right = std::max(border.horizontal.right, adjacentBorderLeft) / 2; |
| } |
| // Collapsed border top from table, row and adjacent cells. |
| auto& rows = m_grid.rows().list(); |
| if (!cellPosition.row) |
| border.vertical.top = collapsedBorder->vertical.top / 2; |
| else { |
| auto adjacentBorderBottom = computedBorder(m_grid.slot({ cellPosition.column, cellPosition.row - 1 })->cell().box()).vertical.bottom; |
| auto adjacentRowBottom = computedBorder(rows[cellPosition.row - 1].box()).vertical.bottom; |
| auto adjacentCollapsedBorder = std::max(adjacentBorderBottom, adjacentRowBottom); |
| border.vertical.top = std::max(border.vertical.top, adjacentCollapsedBorder) / 2; |
| } |
| // Collapsed border bottom from table, row and adjacent cells. |
| if (cellPosition.row == m_grid.rows().size() - 1) |
| border.vertical.bottom = collapsedBorder->vertical.bottom / 2; |
| else { |
| auto adjacentBorderTop = computedBorder(m_grid.slot({ cellPosition.column, cellPosition.row + 1 })->cell().box()).vertical.top; |
| auto adjacentRowTop = computedBorder(rows[cellPosition.row + 1].box()).vertical.top; |
| auto adjacentCollapsedBorder = std::max(adjacentBorderTop, adjacentRowTop); |
| border.vertical.bottom = std::max(border.vertical.bottom, adjacentCollapsedBorder) / 2; |
| } |
| return border; |
| } |
| |
| Optional<LayoutUnit> TableFormattingContext::Geometry::computedColumnWidth(const ContainerBox& columnBox) |
| { |
| // Check both style and <col>'s width attribute. |
| // FIXME: Figure out what to do with calculated values, like <col style="width: 10%">. |
| if (auto computedWidthValue = computedWidth(columnBox, { })) |
| return computedWidthValue; |
| return columnBox.columnWidth(); |
| } |
| |
| FormattingContext::IntrinsicWidthConstraints TableFormattingContext::Geometry::intrinsicWidthConstraintsForCell(const TableGrid::Cell& cell) |
| { |
| auto& cellBox = cell.box(); |
| auto& style = cellBox.style(); |
| |
| auto computedIntrinsicWidthConstraints = [&]() -> FormattingContext::IntrinsicWidthConstraints { |
| // Even fixed width cells expand to their minimum content width |
| // <td style="width: 10px">test_content</td> will size to max(minimum content width, computed width). |
| auto intrinsicWidthConstraints = FormattingContext::IntrinsicWidthConstraints { }; |
| if (cellBox.hasChild()) |
| intrinsicWidthConstraints = LayoutContext::createFormattingContext(cellBox, layoutState())->computedIntrinsicWidthConstraints(); |
| if (auto fixedWidth = fixedValue(style.logicalWidth())) |
| return { std::max(intrinsicWidthConstraints.minimum, *fixedWidth), std::max(intrinsicWidthConstraints.minimum, *fixedWidth) }; |
| return intrinsicWidthConstraints; |
| }; |
| // FIXME Check for box-sizing: border-box; |
| auto intrinsicWidthConstraints = constrainByMinMaxWidth(cellBox, computedIntrinsicWidthConstraints()); |
| // Expand with border |
| intrinsicWidthConstraints.expand(computedCellBorder(cell).width()); |
| // padding |
| intrinsicWidthConstraints.expand(fixedValue(style.paddingLeft()).valueOr(0) + fixedValue(style.paddingRight()).valueOr(0)); |
| // and margin |
| intrinsicWidthConstraints.expand(fixedValue(style.marginStart()).valueOr(0) + fixedValue(style.marginEnd()).valueOr(0)); |
| return intrinsicWidthConstraints; |
| } |
| |
| |
| InlineLayoutUnit TableFormattingContext::Geometry::usedBaselineForCell(const ContainerBox& cellBox) |
| { |
| // The baseline of a cell is defined as the baseline of the first in-flow line box in the cell, |
| // or the first in-flow table-row in the cell, whichever comes first. |
| // If there is no such line box, the baseline is the bottom of content edge of the cell box. |
| if (cellBox.establishesInlineFormattingContext()) |
| return layoutState().establishedInlineFormattingState(cellBox).displayInlineContent()->lineBoxes[0].baselineOffset(); |
| for (auto& cellDescendant : descendantsOfType<ContainerBox>(cellBox)) { |
| if (cellDescendant.establishesInlineFormattingContext()) { |
| auto* displayInlineContent = layoutState().establishedInlineFormattingState(cellDescendant).displayInlineContent(); |
| if (!displayInlineContent->runs.isEmpty()) |
| return displayInlineContent->lineBoxes[0].baselineOffset(); |
| } |
| if (cellDescendant.establishesTableFormattingContext()) |
| return layoutState().establishedTableFormattingState(cellDescendant).tableGrid().rows().list()[0].baselineOffset(); |
| } |
| return formattingContext().geometryForBox(cellBox).contentBoxBottom(); |
| } |
| |
| } |
| } |
| |
| #endif |