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- // Copyright 2021 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "ui/accessibility/ax_tree_update.h"
- #include "ui/accessibility/ax_tree_data.h"
- #include "base/strings/string_number_conversions.h"
- #include "ui/accessibility/ax_enum_util.h"
- namespace ui {
- AXTreeUpdate::AXTreeUpdate() = default;
- AXTreeUpdate::AXTreeUpdate(const ui::AXTreeUpdate& other) = default;
- AXTreeUpdate::~AXTreeUpdate() = default;
- std::string AXTreeUpdate::ToString() const {
- std::string result;
- if (has_tree_data) {
- result += "AXTreeUpdate tree data:" + tree_data.ToString() + "\n";
- }
- if (node_id_to_clear != kInvalidAXNodeID) {
- result += "AXTreeUpdate: clear node " +
- base::NumberToString(node_id_to_clear) + "\n";
- }
- if (root_id != kInvalidAXNodeID) {
- result += "AXTreeUpdate: root id " + base::NumberToString(root_id) + "\n";
- }
- if (event_from != ax::mojom::EventFrom::kNone)
- result += "event_from=" + std::string(ui::ToString(event_from)) + "\n";
- if (event_from_action != ax::mojom::Action::kNone)
- result +=
- "event_from_action=" + std::string(ui::ToString(event_from_action)) +
- "\n";
- if (!event_intents.empty()) {
- result += "event_intents=[\n";
- for (const auto& event_intent : event_intents)
- result += " " + event_intent.ToString() + "\n";
- result += "]\n";
- }
- // The challenge here is that we want to indent the nodes being updated
- // so that parent/child relationships are clear, but we don't have access
- // to the rest of the tree for context, so we have to try to show the
- // relative indentation of child nodes in this update relative to their
- // parents.
- std::map<AXNodeID, int> id_to_indentation;
- for (const AXNodeData& node_data : nodes) {
- int indent = id_to_indentation[node_data.id];
- result += std::string(2 * indent, ' ');
- result += node_data.ToString() + "\n";
- for (AXNodeID child_id : node_data.child_ids)
- id_to_indentation[child_id] = indent + 1;
- }
- return result;
- }
- bool TreeUpdatesCanBeMerged(
- const AXTreeUpdate& u1,
- const AXTreeUpdate& u2) {
- if (u2.node_id_to_clear)
- return false;
- if (u2.has_tree_data && u2.tree_data != u1.tree_data)
- return false;
- if (u2.root_id != u1.root_id)
- return false;
- return true;
- }
- } // namespace ui
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