Refactor and send voice interaction structure

ui/accessibility/platform/ax_snapshot_node_android_platform.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 <cstdint>
+#include <memory>
+#include <vector>
+
+#include "base/strings/string16.h"
+#include "ui/accessibility/ax_enums.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 {
+  // Builds a whole tree of AXSnapshotNodeAndroid objects from
+  // an AXTreeUpdate.
+  AX_EXPORT static std::unique_ptr<AXSnapshotNodeAndroid> Create(
+      const AXTreeUpdate& update,
+      bool show_password);
+
+  // Returns a fake Android view class that is a closest
+  // approximation of the AXRole.
+  AX_EXPORT static const char* AXRoleToAndroidClassName(AXRole role,
+                                                        bool has_parent);
+
+  AX_EXPORT static bool AXRoleIsLink(AXRole role);
+
+  AX_EXPORT static base::string16 AXUrlBaseText(base::string16 url);
+
+  AX_EXPORT ~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:
+  AXSnapshotNodeAndroid();
+
+  struct WalkAXTreeConfig {
+    bool should_select_leaf;
+    const bool show_password;
+  };
+
+  static std::unique_ptr<AXSnapshotNodeAndroid> WalkAXTreeDepthFirst(
+      const AXNode* node,
+      gfx::Rect rect,
+      const ui::AXTreeUpdate& update,
+      const AXTree* tree,
+      WalkAXTreeConfig& config);
+
+  DISALLOW_COPY_AND_ASSIGN(AXSnapshotNodeAndroid);
+};
+
+}  // namespace ui
+
+#endif  // UI_ACCESSIBILITY_PLATFORM_AX_SNAPSHOT_ANDROID_H_