1 files changed, 101 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/core/layout/ng/table/layout_ng_table_section.cc b/chromium/third_party/blink/renderer/core/layout/ng/table/layout_ng_table_section.cc
new file mode 100644
index 00000000000..06225acabcb
--- /dev/null
+++ b/chromium/third_party/blink/renderer/core/layout/ng/table/layout_ng_table_section.cc
@@ -0,0 +1,101 @@
+// Copyright 2020 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 "third_party/blink/renderer/core/layout/ng/table/layout_ng_table_section.h"
+
+#include "third_party/blink/renderer/core/layout/layout_analyzer.h"
+#include "third_party/blink/renderer/core/layout/layout_view.h"
+#include "third_party/blink/renderer/core/layout/ng/table/layout_ng_table.h"
+#include "third_party/blink/renderer/core/layout/ng/table/layout_ng_table_cell.h"
+#include "third_party/blink/renderer/core/layout/ng/table/layout_ng_table_interface.h"
+#include "third_party/blink/renderer/core/layout/ng/table/layout_ng_table_row.h"
+
+namespace blink {
+
+LayoutNGTableSection::LayoutNGTableSection(Element* element)
+    : LayoutNGMixin<LayoutBlock>(element) {}
+
+bool LayoutNGTableSection::IsEmpty() const {
+  for (LayoutObject* child = FirstChild(); child;
+       child = child->NextSibling()) {
+    if (!To<LayoutNGTableRow>(child)->IsEmpty())
+      return false;
+  }
+  return true;
+}
+
+LayoutNGTableInterface* LayoutNGTableSection::TableInterface() const {
+  return ToInterface<LayoutNGTableInterface>(Parent());
+}
+
+void LayoutNGTableSection::SetNeedsCellRecalc() {
+  SetNeedsLayout(layout_invalidation_reason::kDomChanged);
+}
+
+LayoutNGTableRowInterface* LayoutNGTableSection::FirstRowInterface() const {
+  return ToInterface<LayoutNGTableRowInterface>(FirstChild());
+}
+
+LayoutNGTableRowInterface* LayoutNGTableSection::LastRowInterface() const {
+  return ToInterface<LayoutNGTableRowInterface>(LastChild());
+}
+
+const LayoutNGTableCellInterface* LayoutNGTableSection::PrimaryCellInterfaceAt(
+    unsigned row,
+    unsigned column) const {
+  unsigned current_row = 0;
+  for (LayoutObject* layout_row = FirstChild(); layout_row;
+       layout_row = layout_row->NextSibling()) {
+    DCHECK(layout_row->IsTableRow());
+    if (current_row++ == row) {
+      unsigned current_column = 0;
+      for (LayoutObject* layout_cell = layout_row->SlowFirstChild();
+           layout_cell; layout_cell = layout_cell->NextSibling()) {
+        if (current_column++ == column) {
+          return ToInterface<LayoutNGTableCellInterface>(layout_cell);
+        }
+      }
+      return nullptr;
+    }
+  }
+  return nullptr;
+}
+
+// TODO(crbug.com/1079133): Used by AXLayoutObject::IsDataTable, verify
+// behaviour is correct. Consider removing these methods.
+unsigned LayoutNGTableSection::NumEffectiveColumns() const {
+  return To<LayoutNGTable>(TableInterface()->ToLayoutObject())->ColumnCount();
+}
+
+// TODO(crbug.com/1079133): Used by AXLayoutObject::IsDataTable/ColumnCount,
+// verify behaviour is correct.
+unsigned LayoutNGTableSection::NumCols(unsigned row) const {
+  unsigned current_row = 0;
+  for (LayoutObject* layout_row = FirstChild(); layout_row;
+       layout_row = layout_row->NextSibling()) {
+    if (current_row++ == row) {
+      unsigned current_column = 0;
+      for (LayoutObject* layout_cell = FirstChild(); layout_cell;
+           layout_cell = layout_cell->NextSibling()) {
+        ++current_column;
+      }
+      return current_column;
+    }
+  }
+  return 0;
+}
+
+// TODO(crbug.com/1079133): Used by AXLayoutObject, verify behaviour is
+// correct, and if caching is required.
+unsigned LayoutNGTableSection::NumRows() const {
+  unsigned num_rows = 0;
+  for (LayoutObject* layout_row = FirstChild(); layout_row;
+       layout_row = layout_row->NextSibling()) {
+    // TODO(crbug.com/1079133) skip for abspos?
+    ++num_rows;
+  }
+  return num_rows;
+}
+
+}  // namespace blink