Forward BrowserAccessibility::get_accSelection to AXPlatformNode.

content/browser/accessibility/browser_accessibility_com_win.cc

 // Copyright (c) 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.
 
 #include "content/browser/accessibility/browser_accessibility_com_win.h"
 
 #include <UIAutomationClient.h>
 #include <UIAutomationCoreApi.h>
 
 #include <algorithm>
@@ skipping 667 matching lines @@
                                                           LONG* topic_id) {
   WIN_ACCESSIBILITY_API_HISTOGRAM(UMA_API_GET_ACC_HELP_TOPIC);
   return AXPlatformNodeWin::get_accHelpTopic(help_file, var_id, topic_id);
 }
 
 STDMETHODIMP BrowserAccessibilityComWin::get_accSelection(VARIANT* selected) {
   WIN_ACCESSIBILITY_API_HISTOGRAM(UMA_API_GET_ACC_SELECTION);
   if (!owner())
     return E_FAIL;
 
-  if (owner()->GetRole() != ui::AX_ROLE_LIST_BOX)
-    return E_NOTIMPL;
-
-  unsigned long selected_count = 0;
-  for (size_t i = 0; i < owner()->InternalChildCount(); ++i) {
-    if (owner()->InternalGetChild(i)->HasState(ui::AX_STATE_SELECTED))
-      ++selected_count;
-  }
-
-  if (selected_count == 0) {
-    selected->vt = VT_EMPTY;
-    return S_OK;
-  }
-
-  if (selected_count == 1) {
-    for (size_t i = 0; i < owner()->InternalChildCount(); ++i) {
-      if (owner()->InternalGetChild(i)->HasState(ui::AX_STATE_SELECTED)) {
-        selected->vt = VT_DISPATCH;
-        selected->pdispVal =
-            ToBrowserAccessibilityComWin(owner()->InternalGetChild(i))
-                ->NewReference();
-        return S_OK;
-      }
-    }
-  }
-
-  // Multiple items are selected.
-  base::win::EnumVariant* enum_variant =
-      new base::win::EnumVariant(selected_count);
-  enum_variant->AddRef();
-  unsigned long index = 0;
-  for (size_t i = 0; i < owner()->InternalChildCount(); ++i) {
-    if (owner()->InternalGetChild(i)->HasState(ui::AX_STATE_SELECTED)) {
-      enum_variant->ItemAt(index)->vt = VT_DISPATCH;
-      enum_variant->ItemAt(index)->pdispVal =
-          ToBrowserAccessibilityComWin(owner()->InternalGetChild(i))
-              ->NewReference();
-      ++index;
-    }
-  }
-  selected->vt = VT_UNKNOWN;
-  selected->punkVal = static_cast<IUnknown*>(
-      static_cast<base::win::IUnknownImpl*>(enum_variant));
-  return S_OK;
+  return AXPlatformNodeWin::get_accSelection(selected);
 }
 
 STDMETHODIMP BrowserAccessibilityComWin::accSelect(LONG flags_sel,
                                                    VARIANT var_id) {
   WIN_ACCESSIBILITY_API_HISTOGRAM(UMA_API_ACC_SELECT);
   if (!owner())
     return E_FAIL;
 
   return AXPlatformNodeWin::accSelect(flags_sel, var_id);
 }
@@ skipping 4841 matching lines @@
 
 BrowserAccessibilityComWin* ToBrowserAccessibilityComWin(
     BrowserAccessibility* obj) {
   if (!obj || !obj->IsNative())
     return nullptr;
   auto* result = static_cast<BrowserAccessibilityWin*>(obj)->GetCOM();
   return result;
 }
 
 }  // namespace content