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alert_platform_node_delegate.h
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef FLUTTER_SHELL_PLATFORM_COMMON_ALERT_PLATFORM_NODE_DELEGATE_H_
6 #define FLUTTER_SHELL_PLATFORM_COMMON_ALERT_PLATFORM_NODE_DELEGATE_H_
7
8 #include "flutter/fml/macros.h"
9 #include "flutter/third_party/accessibility/ax/ax_node_data.h"
10 #include "flutter/third_party/accessibility/ax/platform/ax_platform_node_delegate_base.h"
11
12 namespace flutter {
13
14 // A delegate for a node that holds the text of an a11y alert that a
15 // screen-reader should announce. The delegate is used to construct an
16 // AXPlatformNode, and in order to serve as an alert, only needs to be able to
17 // hold a text announcement and make that text available to the platform node.
18 class AlertPlatformNodeDelegate : public ui::AXPlatformNodeDelegateBase {
19 public:
20 explicit AlertPlatformNodeDelegate(
21 ui::AXPlatformNodeDelegate& parent_delegate);
22 ~AlertPlatformNodeDelegate();
23
24 // Set the alert text of the node for which this is the delegate.
25 void SetText(const std::u16string& text);
26
27 // |AXPlatformNodeDelegate|
28 gfx::NativeViewAccessible GetParent() override;
29
30 private:
31 // AXPlatformNodeDelegate overrides.
32 gfx::AcceleratedWidget GetTargetForNativeAccessibilityEvent() override;
33 const ui::AXUniqueId& GetUniqueId() const override;
34 const ui::AXNodeData& GetData() const override;
35
36 // Delegate of the parent of this node. Returned by GetParent.
37 ui::AXPlatformNodeDelegate& parent_delegate_;
38
39 // Node Data that contains the alert text. Returned by GetData.
40 ui::AXNodeData data_;
41
42 // A unique ID used to identify this node. Returned by GetUniqueId.
43 ui::AXUniqueId id_;
44
45 FML_DISALLOW_COPY_AND_ASSIGN(AlertPlatformNodeDelegate);
46 };
47
48 } // namespace flutter
49
50 #endif // FLUTTER_SHELL_PLATFORM_COMMON_ALERT_PLATFORM_NODE_DELEGATE_H_
flutter::AlertPlatformNodeDelegate::GetParent
gfx::NativeViewAccessible GetParent() override
Definition: alert_platform_node_delegate.cc:23
flutter::AlertPlatformNodeDelegate
Definition: alert_platform_node_delegate.h:18
flutter::AlertPlatformNodeDelegate::AlertPlatformNodeDelegate
AlertPlatformNodeDelegate(ui::AXPlatformNodeDelegate &parent_delegate)
Definition: alert_platform_node_delegate.cc:9
flutter::AlertPlatformNodeDelegate::~AlertPlatformNodeDelegate
~AlertPlatformNodeDelegate()
Definition: alert_platform_node_delegate.cc:16
flutter
Definition: accessibility_bridge.h:28
flutter::AlertPlatformNodeDelegate::SetText
void SetText(const std::u16string &text)
Definition: alert_platform_node_delegate.cc:35