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