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* Scenic is used on the GPU thread and is owned by the session connection held by the rasterizer. * The view container is used to initialize the mozart bindings on the UI thread. * Accessibility bridge is used on the platform thread.
45 lines
1.3 KiB
C++
45 lines
1.3 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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#pragma once
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#include <map>
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#include <fuchsia/cpp/modular.h>
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#include "flutter/lib/ui/semantics/semantics_node.h"
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#include "lib/fxl/macros.h"
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namespace flutter {
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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 final {
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public:
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AccessibilityBridge(fidl::InterfaceHandle<modular::ContextWriter> writer);
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~AccessibilityBridge();
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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 blink::SemanticsNodeUpdates& update);
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private:
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modular::ContextWriterPtr writer_;
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std::map<int, blink::SemanticsNode> semantics_nodes_;
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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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FXL_DISALLOW_COPY_AND_ASSIGN(AccessibilityBridge);
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};
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} // namespace flutter
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