зеркало из https://github.com/mozilla/gecko-dev.git
101 строка
3.2 KiB
C++
101 строка
3.2 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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#include "TableCellAccessible.h"
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#include "Accessible-inl.h"
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#include "TableAccessible.h"
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using namespace mozilla;
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using namespace mozilla::a11y;
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void TableCellAccessible::RowHeaderCells(nsTArray<Accessible*>* aCells) {
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uint32_t rowIdx = RowIdx(), colIdx = ColIdx();
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TableAccessible* table = Table();
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if (!table) return;
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// Move to the left to find row header cells
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for (uint32_t curColIdx = colIdx - 1; curColIdx < colIdx; curColIdx--) {
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Accessible* cell = table->CellAt(rowIdx, curColIdx);
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if (!cell) continue;
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// CellAt should always return a TableCellAccessible (XXX Bug 587529)
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TableCellAccessible* tableCell = cell->AsTableCell();
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NS_ASSERTION(tableCell, "cell should be a table cell!");
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if (!tableCell) continue;
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// Avoid addding cells multiple times, if this cell spans more columns
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// we'll get it later.
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if (tableCell->ColIdx() == curColIdx && cell->Role() == roles::ROWHEADER)
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aCells->AppendElement(cell);
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}
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}
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Accessible* TableCellAccessible::PrevColHeader() {
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TableAccessible* table = Table();
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if (!table) {
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return nullptr;
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}
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TableAccessible::HeaderCache& cache = table->GetHeaderCache();
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bool inCache = false;
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Accessible* cachedHeader = cache.GetWeak(this, &inCache);
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if (inCache) {
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// Cached but null means we know there is no previous column header.
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// if defunct, the cell was removed, so behave as if there is no cached
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// value.
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if (!cachedHeader || !cachedHeader->IsDefunct()) {
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return cachedHeader;
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}
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}
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uint32_t rowIdx = RowIdx(), colIdx = ColIdx();
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for (uint32_t curRowIdx = rowIdx - 1; curRowIdx < rowIdx; curRowIdx--) {
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Accessible* cell = table->CellAt(curRowIdx, colIdx);
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if (!cell) {
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continue;
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}
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// CellAt should always return a TableCellAccessible (XXX Bug 587529)
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TableCellAccessible* tableCell = cell->AsTableCell();
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MOZ_ASSERT(tableCell, "cell should be a table cell!");
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if (!tableCell) {
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continue;
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}
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// Check whether the previous table cell has a cached value.
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cachedHeader = cache.GetWeak(tableCell, &inCache);
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if (inCache && cell->Role() != roles::COLUMNHEADER) {
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if (!cachedHeader || !cachedHeader->IsDefunct()) {
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// Cache it for this cell.
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cache.Put(this, RefPtr<Accessible>(cachedHeader));
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return cachedHeader;
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}
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}
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// Avoid addding cells multiple times, if this cell spans more rows
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// we'll get it later.
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if (cell->Role() != roles::COLUMNHEADER ||
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tableCell->RowIdx() != curRowIdx) {
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continue;
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}
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// Cache the header we found.
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cache.Put(this, RefPtr<Accessible>(cell));
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return cell;
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}
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// There's no header, so cache that fact.
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cache.Put(this, RefPtr<Accessible>(nullptr));
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return nullptr;
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}
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void TableCellAccessible::ColHeaderCells(nsTArray<Accessible*>* aCells) {
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for (Accessible* cell = PrevColHeader(); cell;
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cell = cell->AsTableCell()->PrevColHeader()) {
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aCells->AppendElement(cell);
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}
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}
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