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43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
// Copyright 2017 The Fuchsia Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef FLUTTER_CONTENT_HANDLER_ACCESSIBILITY_BRIDGE_H_
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#define FLUTTER_CONTENT_HANDLER_ACCESSIBILITY_BRIDGE_H_
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#include <map>
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#include "flutter/lib/ui/semantics/semantics_node.h"
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#include "lib/app/cpp/application_context.h"
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#include "lib/context/fidl/context_writer.fidl.h"
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namespace flutter_runner {
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// Maintain an up-to-date list of SemanticsNodes on screen, and communicate
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// with the Context Service.
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class AccessibilityBridge {
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public:
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explicit AccessibilityBridge(app::ApplicationContext* context);
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// Update the internal representation of the semantics nodes, and write the
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// semantics to Context Service.
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void UpdateSemantics(const std::vector<blink::SemanticsNode>& update);
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private:
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// Walk the semantics node tree starting at |id|, and store the id of each
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// visited child in |visited_nodes|.
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void UpdateVisitedForNodeAndChildren(const int id,
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std::vector<int>* visited_nodes);
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// Remove any node from |semantics_nodes_| that doesn't have an id in
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// |visited_nodes|.
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void EraseUnvisitedNodes(const std::vector<int>& visited_nodes);
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std::map<int, blink::SemanticsNode> semantics_nodes_;
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maxwell::ContextWriterPtr writer_;
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};
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} // namespace flutter_runner
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#endif // FLUTTER_CONTENT_HANDLER_ACCESSIBILITY_BRIDGE_H_
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