Refactor and send voice interaction structure

ui/accessibility/platform/ax_android_snapshot.h

+// Copyright 2017 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.
+
+#ifndef UI_ACCESSIBILITY_PLATFORM_AX_SNAPSHOT_ANDROID_H_
+#define UI_ACCESSIBILITY_PLATFORM_AX_SNAPSHOT_ANDROID_H_
+
+#include <memory>
+#include <vector>
+
+#include "base/strings/string16.h"
+#include "ui/accessibility/ax_export.h"
+#include "ui/accessibility/ax_tree_update.h"
+#include "ui/gfx/geometry/rect.h"
+
+namespace ui {
+
+class AXNode;
+class AXTree;
+
+// An intermediate representation of the accessibility snapshot
+// in order to share code between ARC and Android. The field names
+// are kept consistent with AccessibilitySnapshotNode.java.
+struct AXSnapshotNodeAndroid {
+  static std::unique_ptr<AXSnapshotNodeAndroid> Create(
+      const AXTreeUpdate& update);
+  AXSnapshotNodeAndroid();
+  ~AXSnapshotNodeAndroid();
+
+  gfx::Rect rect;
+  base::string16 text;
+  float text_size;
+  int32_t color;
+  int32_t bgcolor;
+  bool bold;
+  bool italic;
+  bool underline;
+  bool line_through;
+
+  bool has_selection;
+  int32_t start_selection;
+  int32_t end_selection;
+
+  std::string class_name;
+  std::vector<std::unique_ptr<AXSnapshotNodeAndroid>> children;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AXSnapshotNodeAndroid);
+};
+
+AX_EXPORT std::string GetClassName(const AXNode* node);

[dmazzoni, 2017/04/12 20:46:56]

Why are the following functions all defined in the
header file? Can they just be private methods of
AXSnapshotNodeAndroid, or static helper functions in
the .cc file?

If they have to be public, maybe public static methods
of AXSnapshotNodeAndroid?

[Muyuan, 2017/04/12 23:57:11]

I'm a bit hesitated here.. I don't know if we really want to make them public.
They do have almost 1-1 correspondence in terms of functionality and
implementation with the functions in BrowserAccessibility but on the other hand
I doubt how useful it will be to make them public. 

[Muyuan, 2017/04/20 00:06:22]

Moved details into private namespace.

+
+AX_EXPORT base::string16 GetText(const AXNode* node);
+
+AX_EXPORT int GetIntAttribute(const AXNode* node, ui::AXIntAttribute);

[dmazzoni, 2017/04/12 20:46:56]

Unused?

[Muyuan, 2017/04/12 23:57:12]

Acknowledged.

[Muyuan, 2017/04/20 00:06:22]

Done.

+
+AX_EXPORT gfx::Rect GetPageBoundsRect(const AXNode* node, const AXTree* tree);
+
+AX_EXPORT void FixEmptyBounds(const AXNode* node,
+                              gfx::RectF* bounds,
+                              const AXTree* tree);
+
+AX_EXPORT gfx::Rect RelativeToAbsoluteBounds(const AXNode* node,
+                                             gfx::RectF bounds,
+                                             const AXTree* tree);
+
+}  // namespace ui
+
+#endif  // UI_ACCESSIBILITY_PLATFORM_AX_SNAPSHOT_ANDROID_H_