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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "services/accessibility/android/drawer_layout_handler.h"
#include <vector>
#include "base/memory/raw_ptr.h"
#include "base/strings/string_util.h"
#include "services/accessibility/android/accessibility_info_data_wrapper.h"
#include "services/accessibility/android/android_accessibility_util.h"
#include "services/accessibility/android/ax_tree_source_android.h"
#include "services/accessibility/android/public/mojom/accessibility_helper.mojom-forward.h"
#include "ui/accessibility/ax_enums.mojom.h"
#include "ui/accessibility/ax_node_data.h"
namespace {
constexpr char kDrawerLayoutClassNameAndroidX[] =
"androidx.drawerlayout.widget.DrawerLayout";
constexpr char kDrawerLayoutClassNameLegacy[] =
"android.support.v4.widget.DrawerLayout";
bool IsDrawerLayout(ax::android::mojom::AccessibilityNodeInfoData* node) {
if (!node || !node->string_properties) {
return false;
}
auto it = node->string_properties->find(
ax::android::mojom::AccessibilityStringProperty::CLASS_NAME);
if (it == node->string_properties->end()) {
return false;
}
return it->second == kDrawerLayoutClassNameAndroidX ||
it->second == kDrawerLayoutClassNameLegacy;
}
} // namespace
namespace ax::android {
// static
std::optional<std::pair<int32_t, std::unique_ptr<DrawerLayoutHandler>>>
DrawerLayoutHandler::CreateIfNecessary(
AXTreeSourceAndroid* tree_source,
const mojom::AccessibilityEventData& event_data) {
if (event_data.event_type !=
mojom::AccessibilityEventType::WINDOW_STATE_CHANGED) {
return std::nullopt;
}
AccessibilityInfoDataWrapper* source_node =
tree_source->GetFromId(event_data.source_id);
if (!source_node || !IsDrawerLayout(source_node->GetNode())) {
return std::nullopt;
}
// Find a node with accessibility importance. That is a menu node opened now.
// Extract the accessibility name of the drawer menu from the event text.
std::vector<raw_ptr<AccessibilityInfoDataWrapper, VectorExperimental>>
children;
source_node->GetChildren(&children);
for (ax::android::AccessibilityInfoDataWrapper* child : children) {
if (!child->IsNode() || !child->IsVisibleToUser() ||
!GetBooleanProperty(child->GetNode(),
mojom::AccessibilityBooleanProperty::IMPORTANCE)) {
continue;
}
return std::make_pair(
child->GetId(),
std::make_unique<DrawerLayoutHandler>(
child->GetId(),
base::JoinString(
event_data.event_text.value_or<std::vector<std::string>>({}),
" ")));
}
return std::nullopt;
}
bool DrawerLayoutHandler::PreDispatchEvent(
AXTreeSourceAndroid* tree_source,
const mojom::AccessibilityEventData& event_data) {
return false;
}
void DrawerLayoutHandler::PostSerializeNode(ui::AXNodeData* out_data) const {
out_data->role = ax::mojom::Role::kMenu;
if (!name_.empty()) {
out_data->SetName(name_);
}
}
bool DrawerLayoutHandler::ShouldDestroy(
AXTreeSourceAndroid* tree_source) const {
return tree_source->GetFromId(node_id_) == nullptr;
}
} // namespace ax::android
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