Move IA2 State handling to AXPlatformNodeWin.

ui/accessibility/platform/ax_platform_node_win.cc

 // Copyright 2015 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 <atlbase.h>
 #include <atlcom.h>
 #include <limits.h>
 #include <oleacc.h>
 #include <stdint.h>
 
@@ skipping 729 matching lines @@
 //
 
 STDMETHODIMP AXPlatformNodeWin::role(LONG* role) {
   COM_OBJECT_VALIDATE_1_ARG(role);
   *role = MSAARole();
   return S_OK;
 }
 
 STDMETHODIMP AXPlatformNodeWin::get_states(AccessibleStates* states) {
   COM_OBJECT_VALIDATE_1_ARG(states);
-  // There are only a couple of states we need to support
-  // in IAccessible2. If any more are added, we may want to
-  // add a helper function like MSAAState.
-  *states = IA2_STATE_OPAQUE;
-  if (GetData().state & (1 << ui::AX_STATE_EDITABLE))
-    *states |= IA2_STATE_EDITABLE;
-  if (GetData().state & (1 << ui::AX_STATE_VERTICAL))
-    *states |= IA2_STATE_VERTICAL;
-
+  *states = MSAA_IA2State();
   return S_OK;
 }
 
 STDMETHODIMP AXPlatformNodeWin::get_uniqueID(LONG* unique_id) {
   COM_OBJECT_VALIDATE_1_ARG(unique_id);
   *unique_id = -unique_id_;
   return S_OK;
 }
 
 STDMETHODIMP AXPlatformNodeWin::get_windowHandle(HWND* window_handle) {
@@ skipping 829 matching lines @@
     return false;
   }
 
   auto* parent = FromNativeViewAccessible(GetParent());
   if (!parent)
     return false;
 
   return parent->GetData().role == ui::AX_ROLE_IFRAME_PRESENTATIONAL;
 }
 
+int32_t AXPlatformNodeWin::MSAA_IA2State() {
+  const AXNodeData& data = GetData();

[dmazzoni, 2017/07/06 22:54:57]

Not sure how significant this is, but we're calling
GetData more times now. Previously we'd call it
fewer times and compute a lot from it, now we
call it inside each function.

For web, GetData is fast, but for Views we
recompute it each time.

[dougt, 2017/07/11 20:59:27]

Acknowledged.  Do you think we should measure the cost of calling GetData() and
collect telemetry in a follow up?

+
+  int32_t ia2_state = IA2_STATE_OPAQUE;
+
+  const auto checked_state = static_cast<ui::AXCheckedState>(
+      GetIntAttribute(ui::AX_ATTR_CHECKED_STATE));
+  if (checked_state) {
+    ia2_state |= IA2_STATE_CHECKABLE;
+  }
+
+  if (HasIntAttribute(ui::AX_ATTR_INVALID_STATE) &&
+      GetIntAttribute(ui::AX_ATTR_INVALID_STATE) != ui::AX_INVALID_STATE_FALSE)
+    ia2_state |= IA2_STATE_INVALID_ENTRY;
+  if (data.HasState(ui::AX_STATE_REQUIRED))
+    ia2_state |= IA2_STATE_REQUIRED;
+  if (data.HasState(ui::AX_STATE_VERTICAL))
+    ia2_state |= IA2_STATE_VERTICAL;
+  if (data.HasState(ui::AX_STATE_HORIZONTAL))
+    ia2_state |= IA2_STATE_HORIZONTAL;
+  if (data.HasState(ui::AX_STATE_EDITABLE))
+    ia2_state |= IA2_STATE_EDITABLE;
+
+  if (!GetStringAttribute(ui::AX_ATTR_AUTO_COMPLETE).empty())
+    ia2_state |= IA2_STATE_SUPPORTS_AUTOCOMPLETION;
+
+  if (GetBoolAttribute(ui::AX_ATTR_MODAL))
+    ia2_state |= IA2_STATE_MODAL;
+
+  switch (data.role) {
+    case ui::AX_ROLE_MENU_LIST_POPUP:
+      ia2_state &= ~(IA2_STATE_EDITABLE);
+      break;
+    case ui::AX_ROLE_MENU_LIST_OPTION:
+      ia2_state &= ~(IA2_STATE_EDITABLE);
+      break;
+    case ui::AX_ROLE_SCROLL_AREA:
+      ia2_state &= ~(IA2_STATE_EDITABLE);
+      break;
+    case ui::AX_ROLE_TEXT_FIELD:
+    case ui::AX_ROLE_SEARCH_BOX:
+      if (data.HasState(ui::AX_STATE_MULTILINE)) {
+        ia2_state |= IA2_STATE_MULTI_LINE;
+      } else {
+        ia2_state |= IA2_STATE_SINGLE_LINE;
+      }
+      ia2_state |= IA2_STATE_SELECTABLE_TEXT;
+      break;
+    default:
+      break;
+  }
+  return ia2_state;
+}
+
 bool AXPlatformNodeWin::ShouldNodeHaveReadonlyState(
     const AXNodeData& data) const {
   if (data.GetBoolAttribute(ui::AX_ATTR_ARIA_READONLY))
     return true;
 
   if (!data.HasState(ui::AX_STATE_READ_ONLY))
     return false;
 
   switch (data.role) {
     case ui::AX_ROLE_ARTICLE:
@@ skipping 323 matching lines @@
   }
 
   if (!container) {
     return false;
   }
 
   return container->GetData().role == ui::AX_ROLE_TREE_GRID;
 }
 
 }  // namespace ui