1 files changed, 72 insertions, 0 deletions
diff --git a/accessible/generic/TableAccessible.h b/accessible/generic/TableAccessible.h
new file mode 100644
index 0000000000..e2cd51de70
--- /dev/null
+++ b/accessible/generic/TableAccessible.h
@@ -0,0 +1,72 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef TABLE_ACCESSIBLE_H
+#define TABLE_ACCESSIBLE_H
+
+#include "LocalAccessible.h"
+#include "mozilla/a11y/TableAccessibleBase.h"
+#include "mozilla/a11y/TableCellAccessibleBase.h"
+#include "nsPointerHashKeys.h"
+#include "nsRefPtrHashtable.h"
+
+namespace mozilla {
+namespace a11y {
+
+/**
+ * Base class for LocalAccessible table implementations.
+ */
+class TableAccessible : public TableAccessibleBase {
+ public:
+  virtual LocalAccessible* Caption() const override { return nullptr; }
+
+  virtual LocalAccessible* CellAt(uint32_t aRowIdx, uint32_t aColIdx) override {
+    return nullptr;
+  }
+
+  virtual int32_t CellIndexAt(uint32_t aRowIdx, uint32_t aColIdx) override {
+    return ColCount() * aRowIdx + aColIdx;
+  }
+
+  virtual int32_t ColIndexAt(uint32_t aCellIdx) override;
+  virtual int32_t RowIndexAt(uint32_t aCellIdx) override;
+  virtual void RowAndColIndicesAt(uint32_t aCellIdx, int32_t* aRowIdx,
+                                  int32_t* aColIdx) override;
+  virtual bool IsProbablyLayoutTable() override;
+  virtual LocalAccessible* AsAccessible() override = 0;
+
+  using HeaderCache =
+      nsRefPtrHashtable<nsPtrHashKey<const TableCellAccessibleBase>,
+                        LocalAccessible>;
+
+  /**
+   * Get the header cache, which maps a TableCellAccessible to its previous
+   * header.
+   * Although this data is only used in TableCellAccessible, it is stored on
+   * TableAccessible so the cache can be easily invalidated when the table
+   * is mutated.
+   */
+  HeaderCache& GetHeaderCache() { return mHeaderCache; }
+
+ protected:
+  /**
+   * Return row accessible at the given row index.
+   */
+  LocalAccessible* RowAt(int32_t aRow);
+
+  /**
+   * Return cell accessible at the given column index in the row.
+   */
+  LocalAccessible* CellInRowAt(LocalAccessible* aRow, int32_t aColumn);
+
+ private:
+  HeaderCache mHeaderCache;
+};
+
+}  // namespace a11y
+}  // namespace mozilla
+
+#endif