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LibWeb: Add border conflict resolution with rowgroup

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This commit is contained in:
Andi Gallo 2023-07-09 23:04:24 +00:00 • committed by Andreas Kling
parent cf40b95be8
commit 3476cf0fcb
4 changed files with 157 additions and 2 deletions
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49
Userland/Libraries/LibWeb/Layout/TableFormattingContext.cpp
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@ -8,6 +8,7 @@
#include <LibWeb/HTML/BrowsingContext.h>
#include <LibWeb/HTML/HTMLTableCellElement.h>
#include <LibWeb/HTML/HTMLTableColElement.h>
#include <LibWeb/HTML/HTMLTableRowElement.h>
#include <LibWeb/Layout/BlockFormattingContext.h>
#include <LibWeb/Layout/Box.h>
#include <LibWeb/Layout/InlineFormattingContext.h>
@ -1025,6 +1026,7 @@ TableFormattingContext::BorderConflictFinder::BorderConflictFinder(TableFormatti
: m_context(context)
{
collect_conflicting_col_elements();
collect_conflicting_row_group_elements();
}
void TableFormattingContext::BorderConflictFinder::collect_conflicting_col_elements()
@ -1047,11 +1049,29 @@ void TableFormattingContext::BorderConflictFinder::collect_conflicting_col_eleme
}
}
void TableFormattingContext::BorderConflictFinder::collect_conflicting_row_group_elements()
{
m_row_group_elements_by_index.resize(m_context->m_rows.size());
size_t current_row_index = 0;
for_each_child_box_matching(m_context->table_box(), is_table_row_group, [&](auto& row_group_box) {
auto start_row_index = current_row_index;
size_t row_count = 0;
for_each_child_box_matching(row_group_box, is_table_row, [&](auto&) {
++row_count;
});
for_each_child_box_matching(row_group_box, is_table_row, [&](auto&) {
m_row_group_elements_by_index[current_row_index] = RowGroupInfo {
.row_group = &row_group_box, .start_index = start_row_index, .row_count = row_count
};
++current_row_index;
return IterationDecision::Continue;
});
});
}
Vector<TableFormattingContext::ConflictingEdge> TableFormattingContext::BorderConflictFinder::conflicting_edges(
Cell const& cell, TableFormattingContext::ConflictingSide edge) const
{
// FIXME: Conflicting elements can be cells, rows, row groups, columns, column groups, and the table itself,
// but we only consider cells, rows, 'col' elements in a 'colgroup' and the table itself for now.
Vector<ConflictingEdge> result = {};
if (cell.column_index >= cell.column_span && edge == ConflictingSide::Left) {
auto maybe_cell_to_left = m_context->m_cells_by_coordinate[cell.row_index][cell.column_index - cell.column_span];
@ -1089,6 +1109,25 @@ Vector<TableFormattingContext::ConflictingEdge> TableFormattingContext::BorderCo
if (cell.row_index + cell.row_span < m_context->m_rows.size() && edge == ConflictingSide::Bottom) {
result.append({ m_context->m_rows[cell.row_index + cell.row_span].box, ConflictingSide::Top });
}
auto const& maybe_row_group = m_row_group_elements_by_index[cell.row_index];
if (maybe_row_group.has_value() && cell.row_index == maybe_row_group->start_index && edge == ConflictingSide::Top) {
result.append({ maybe_row_group->row_group, ConflictingSide::Top });
}
if (cell.row_index >= cell.row_span) {
auto const& maybe_row_group_above = m_row_group_elements_by_index[cell.row_index - cell.row_span];
if (maybe_row_group_above.has_value() && cell.row_index == maybe_row_group_above->start_index + maybe_row_group_above->row_count && edge == ConflictingSide::Top) {
result.append({ maybe_row_group_above->row_group, ConflictingSide::Bottom });
}
}
if (maybe_row_group.has_value() && cell.row_index == maybe_row_group->start_index + maybe_row_group->row_count - 1 && edge == ConflictingSide::Bottom) {
result.append({ maybe_row_group->row_group, ConflictingSide::Bottom });
}
if (cell.row_index + cell.row_span < m_row_group_elements_by_index.size()) {
auto const& maybe_row_group_below = m_row_group_elements_by_index[cell.row_index + cell.row_span];
if (maybe_row_group_below.has_value() && cell.row_index + cell.row_span == maybe_row_group_below->start_index && edge == ConflictingSide::Bottom) {
result.append({ maybe_row_group_below->row_group, ConflictingSide::Top });
}
}
if (m_col_elements_by_index[cell.column_index] && edge == ConflictingSide::Left) {
result.append({ m_col_elements_by_index[cell.column_index], ConflictingSide::Left });
}
@ -1115,10 +1154,16 @@ Vector<TableFormattingContext::ConflictingEdge> TableFormattingContext::BorderCo
}
if (cell.column_index == 0 && edge == ConflictingSide::Left) {
result.append({ m_context->m_rows[cell.row_index].box, ConflictingSide::Left });
if (m_row_group_elements_by_index[cell.row_index].has_value()) {
result.append({ m_row_group_elements_by_index[cell.row_index]->row_group, ConflictingSide::Left });
}
result.append({ &m_context->table_box(), ConflictingSide::Left });
}
if (cell.column_index == m_context->m_columns.size() - 1 && edge == ConflictingSide::Right) {
result.append({ m_context->m_rows[cell.row_index].box, ConflictingSide::Right });
if (m_row_group_elements_by_index[cell.row_index].has_value()) {
result.append({ m_row_group_elements_by_index[cell.row_index]->row_group, ConflictingSide::Right });
}
result.append({ &m_context->table_box(), ConflictingSide::Right });
}
return result;