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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/accessibility/platform/compute_attributes.h"
#include <cstddef>
#include <optional>
#include "ui/accessibility/ax_enums.mojom.h"
#include "ui/accessibility/ax_node_data.h"
#include "ui/accessibility/platform/ax_platform_node_delegate.h"
namespace ui {
namespace {
std::optional<int32_t> GetCellAttribute(const AXPlatformNodeDelegate* delegate,
ax::mojom::IntAttribute attribute) {
switch (attribute) {
case ax::mojom::IntAttribute::kAriaCellColumnIndex:
return delegate->GetTableCellAriaColIndex();
case ax::mojom::IntAttribute::kAriaCellRowIndex:
return delegate->GetTableCellAriaRowIndex();
case ax::mojom::IntAttribute::kTableCellColumnIndex:
return delegate->GetTableCellColIndex();
case ax::mojom::IntAttribute::kTableCellRowIndex:
return delegate->GetTableCellRowIndex();
case ax::mojom::IntAttribute::kTableCellColumnSpan:
return delegate->GetTableCellColSpan();
case ax::mojom::IntAttribute::kTableCellRowSpan:
return delegate->GetTableCellRowSpan();
default:
return std::nullopt;
}
}
std::optional<int32_t> GetRowAttribute(const AXPlatformNodeDelegate* delegate,
ax::mojom::IntAttribute attribute) {
if (attribute == ax::mojom::IntAttribute::kTableRowIndex) {
return delegate->GetTableRowRowIndex();
}
return std::nullopt;
}
std::optional<int32_t> GetTableAttribute(const AXPlatformNodeDelegate* delegate,
ax::mojom::IntAttribute attribute) {
switch (attribute) {
case ax::mojom::IntAttribute::kTableColumnCount:
return delegate->GetTableColCount();
case ax::mojom::IntAttribute::kTableRowCount:
return delegate->GetTableRowCount();
case ax::mojom::IntAttribute::kAriaColumnCount:
return delegate->GetTableAriaColCount();
case ax::mojom::IntAttribute::kAriaRowCount:
return delegate->GetTableAriaRowCount();
default:
return std::nullopt;
}
}
std::optional<int> GetOrderedSetItemAttribute(
const AXPlatformNodeDelegate* delegate,
ax::mojom::IntAttribute attribute) {
switch (attribute) {
case ax::mojom::IntAttribute::kPosInSet:
return delegate->GetPosInSet();
case ax::mojom::IntAttribute::kSetSize:
return delegate->GetSetSize();
default:
return std::nullopt;
}
}
std::optional<int> GetOrderedSetAttribute(
const AXPlatformNodeDelegate* delegate,
ax::mojom::IntAttribute attribute) {
switch (attribute) {
case ax::mojom::IntAttribute::kSetSize:
return delegate->GetSetSize();
default:
return std::nullopt;
}
}
std::optional<int32_t> GetFromData(const AXPlatformNodeDelegate* delegate,
ax::mojom::IntAttribute attribute) {
int32_t value;
if (delegate->GetIntAttribute(attribute, &value)) {
return value;
}
return std::nullopt;
}
} // namespace
std::optional<int32_t> ComputeAttribute(const AXPlatformNodeDelegate* delegate,
ax::mojom::IntAttribute attribute) {
std::optional<int32_t> maybe_value = std::nullopt;
// Color-related attributes.
if (attribute == ax::mojom::IntAttribute::kColor)
return delegate->GetColor();
else if (attribute == ax::mojom::IntAttribute::kBackgroundColor)
return delegate->GetBackgroundColor();
// Table-related nodes.
if (delegate->IsTableCellOrHeader())
maybe_value = GetCellAttribute(delegate, attribute);
else if (delegate->IsTableRow())
maybe_value = GetRowAttribute(delegate, attribute);
else if (delegate->IsTable())
maybe_value = GetTableAttribute(delegate, attribute);
// Ordered-set-related nodes.
else if (delegate->IsOrderedSetItem())
maybe_value = GetOrderedSetItemAttribute(delegate, attribute);
else if (delegate->IsOrderedSet())
maybe_value = GetOrderedSetAttribute(delegate, attribute);
if (!maybe_value.has_value()) {
return GetFromData(delegate, attribute);
}
return maybe_value;
}
} // namespace ui
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