| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef FLUTTER_SHELL_PLATFORM_COMMON_ALERT_PLATFORM_NODE_DELEGATE_H_ |
| #define FLUTTER_SHELL_PLATFORM_COMMON_ALERT_PLATFORM_NODE_DELEGATE_H_ |
| |
| #include "flutter/third_party/accessibility/ax/ax_node_data.h" |
| #include "flutter/third_party/accessibility/ax/platform/ax_platform_node_delegate_base.h" |
| |
| namespace flutter { |
| |
| // A delegate for a node that holds the text of an a11y alert that a |
| // screen-reader should announce. The delegate is used to construct an |
| // AXPlatformNode, and in order to serve as an alert, only needs to be able to |
| // hold a text announcement and make that text available to the platform node. |
| class AlertPlatformNodeDelegate : public ui::AXPlatformNodeDelegateBase { |
| public: |
| explicit AlertPlatformNodeDelegate( |
| ui::AXPlatformNodeDelegate& parent_delegate); |
| ~AlertPlatformNodeDelegate(); |
| |
| AlertPlatformNodeDelegate(const AlertPlatformNodeDelegate& other) = delete; |
| AlertPlatformNodeDelegate operator=(const AlertPlatformNodeDelegate& other) = |
| delete; |
| |
| // Set the alert text of the node for which this is the delegate. |
| void SetText(const std::u16string& text); |
| |
| // |AXPlatformNodeDelegate| |
| gfx::NativeViewAccessible GetParent() override; |
| |
| private: |
| // AXPlatformNodeDelegate overrides. |
| gfx::AcceleratedWidget GetTargetForNativeAccessibilityEvent() override; |
| const ui::AXUniqueId& GetUniqueId() const override; |
| const ui::AXNodeData& GetData() const override; |
| |
| // Delegate of the parent of this node. Returned by GetParent. |
| ui::AXPlatformNodeDelegate& parent_delegate_; |
| |
| // Node Data that contains the alert text. Returned by GetData. |
| ui::AXNodeData data_; |
| |
| // A unique ID used to identify this node. Returned by GetUniqueId. |
| ui::AXUniqueId id_; |
| }; |
| |
| } // namespace flutter |
| |
| #endif // FLUTTER_SHELL_PLATFORM_COMMON_ALERT_PLATFORM_NODE_DELEGATE_H_ |