views: Move accessibility/ directory to ui/views/.

BUG=104039
R=ben@chromium.org

Review URL: http://codereview.chromium.org/8533010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@109894 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 1387 insertions, 0 deletions

diff --git a/ui/views/accessibility/OWNERS b/ui/views/accessibility/OWNERS
new file mode 100644
index 0000000..11e8fd8
--- /dev/null
+++ b/ui/views/accessibility/OWNERS
@@ -0,0 +1,2 @@
+dmazzoni@chromium.org
+dtseng@chromium.org
diff --git a/ui/views/accessibility/native_view_accessibility_win.cc b/ui/views/accessibility/native_view_accessibility_win.cc
new file mode 100644
index 0000000..8489a3e
--- /dev/null
+++ b/ui/views/accessibility/native_view_accessibility_win.cc
@@ -0,0 +1,1030 @@
+// Copyright (c) 2011 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 "ui/views/accessibility/native_view_accessibility_win.h"
+
+#include <atlbase.h>
+#include <atlcom.h>
+
+#include <vector>
+
+#include "third_party/iaccessible2/ia2_api_all.h"
+#include "ui/base/accessibility/accessible_text_utils.h"
+#include "ui/base/accessibility/accessible_view_state.h"
+#include "ui/base/view_prop.h"
+#include "views/widget/native_widget_win.h"
+#include "views/widget/widget.h"
+
+using ui::AccessibilityTypes;
+
+// static
+long NativeViewAccessibilityWin::next_unique_id_ = 1;
+
+// static
+scoped_refptr<NativeViewAccessibilityWin> NativeViewAccessibilityWin::Create(
+    views::View* view) {
+  CComObject<NativeViewAccessibilityWin>* instance = NULL;
+  HRESULT hr = CComObject<NativeViewAccessibilityWin>::CreateInstance(
+      &instance);
+  DCHECK(SUCCEEDED(hr));
+  instance->set_view(view);
+  return scoped_refptr<NativeViewAccessibilityWin>(instance);
+}
+
+NativeViewAccessibilityWin::NativeViewAccessibilityWin()
+    : view_(NULL),
+      unique_id_(next_unique_id_++) {
+}
+
+NativeViewAccessibilityWin::~NativeViewAccessibilityWin() {
+}
+
+// TODO(ctguil): Handle case where child View is not contained by parent.
+STDMETHODIMP NativeViewAccessibilityWin::accHitTest(
+    LONG x_left, LONG y_top, VARIANT* child) {
+  if (!child)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  gfx::Point point(x_left, y_top);
+  views::View::ConvertPointToView(NULL, view_, &point);
+
+  if (!view_->HitTest(point)) {
+    // If containing parent is not hit, return with failure.
+    child->vt = VT_EMPTY;
+    return S_FALSE;
+  }
+
+  views::View* view = view_->GetEventHandlerForPoint(point);
+  if (view == view_) {
+    // No child hit, return parent id.
+    child->vt = VT_I4;
+    child->lVal = CHILDID_SELF;
+  } else {
+    child->vt = VT_DISPATCH;
+    child->pdispVal = view->GetNativeViewAccessible();
+    child->pdispVal->AddRef();
+  }
+  return S_OK;
+}
+
+HRESULT NativeViewAccessibilityWin::accDoDefaultAction(VARIANT var_id) {
+  if (!IsValidId(var_id))
+    return E_INVALIDARG;
+
+  // The object does not support the method. This value is returned for
+  // controls that do not perform actions, such as edit fields.
+  return DISP_E_MEMBERNOTFOUND;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::accLocation(
+    LONG* x_left, LONG* y_top, LONG* width, LONG* height, VARIANT var_id) {
+  if (!IsValidId(var_id) || !x_left || !y_top || !width || !height)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  if (!view_->bounds().IsEmpty()) {
+    *width  = view_->width();
+    *height = view_->height();
+    gfx::Point topleft(view_->bounds().origin());
+    views::View::ConvertPointToScreen(
+        view_->parent() ? view_->parent() : view_, &topleft);
+    *x_left = topleft.x();
+    *y_top  = topleft.y();
+  } else {
+    return E_FAIL;
+  }
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::accNavigate(
+    LONG nav_dir, VARIANT start, VARIANT* end) {
+  if (start.vt != VT_I4 || !end)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  switch (nav_dir) {
+    case NAVDIR_FIRSTCHILD:
+    case NAVDIR_LASTCHILD: {
+      if (start.lVal != CHILDID_SELF) {
+        // Start of navigation must be on the View itself.
+        return E_INVALIDARG;
+      } else if (!view_->has_children()) {
+        // No children found.
+        return S_FALSE;
+      }
+
+      // Set child_id based on first or last child.
+      int child_id = 0;
+      if (nav_dir == NAVDIR_LASTCHILD)
+        child_id = view_->child_count() - 1;
+
+      views::View* child = view_->child_at(child_id);
+      end->vt = VT_DISPATCH;
+      end->pdispVal = child->GetNativeViewAccessible();
+      end->pdispVal->AddRef();
+      return S_OK;
+    }
+    case NAVDIR_LEFT:
+    case NAVDIR_UP:
+    case NAVDIR_PREVIOUS:
+    case NAVDIR_RIGHT:
+    case NAVDIR_DOWN:
+    case NAVDIR_NEXT: {
+      // Retrieve parent to access view index and perform bounds checking.
+      views::View* parent = view_->parent();
+      if (!parent) {
+        return E_FAIL;
+      }
+
+      if (start.lVal == CHILDID_SELF) {
+        int view_index = parent->GetIndexOf(view_);
+        // Check navigation bounds, adjusting for View child indexing (MSAA
+        // child indexing starts with 1, whereas View indexing starts with 0).
+        if (!IsValidNav(nav_dir, view_index, -1,
+                        parent->child_count() - 1)) {
+          // Navigation attempted to go out-of-bounds.
+          end->vt = VT_EMPTY;
+          return S_FALSE;
+        } else {
+          if (IsNavDirNext(nav_dir)) {
+            view_index += 1;
+          } else {
+            view_index -=1;
+          }
+        }
+
+        views::View* child = parent->child_at(view_index);
+        end->pdispVal = child->GetNativeViewAccessible();
+        end->vt = VT_DISPATCH;
+        end->pdispVal->AddRef();
+        return S_OK;
+      } else {
+        // Check navigation bounds, adjusting for MSAA child indexing (MSAA
+        // child indexing starts with 1, whereas View indexing starts with 0).
+        if (!IsValidNav(nav_dir, start.lVal, 0, parent->child_count() + 1)) {
+            // Navigation attempted to go out-of-bounds.
+            end->vt = VT_EMPTY;
+            return S_FALSE;
+          } else {
+            if (IsNavDirNext(nav_dir)) {
+              start.lVal += 1;
+            } else {
+              start.lVal -= 1;
+            }
+        }
+
+        HRESULT result = this->get_accChild(start, &end->pdispVal);
+        if (result == S_FALSE) {
+          // Child is a leaf.
+          end->vt = VT_I4;
+          end->lVal = start.lVal;
+        } else if (result == E_INVALIDARG) {
+          return E_INVALIDARG;
+        } else {
+          // Child is not a leaf.
+          end->vt = VT_DISPATCH;
+        }
+      }
+      break;
+    }
+    default:
+      return E_INVALIDARG;
+  }
+  // Navigation performed correctly. Global return for this function, if no
+  // error triggered an escape earlier.
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accChild(VARIANT var_child,
+                                             IDispatch** disp_child) {
+  if (var_child.vt != VT_I4 || !disp_child)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  LONG child_id = V_I4(&var_child);
+
+  if (child_id == CHILDID_SELF) {
+    // Remain with the same dispatch.
+    return S_OK;
+  }
+
+  views::View* child_view = NULL;
+  if (child_id > 0) {
+    int child_id_as_index = child_id - 1;
+    if (child_id_as_index < view_->child_count()) {
+      // Note: child_id is a one based index when indexing children.
+      child_view = view_->child_at(child_id_as_index);
+    } else {
+      // Attempt to retrieve a child view with the specified id.
+      child_view = view_->GetViewByID(child_id);
+    }
+  } else {
+    // Negative values are used for events fired using the view's
+    // NativeWidgetWin.
+    views::NativeWidgetWin* widget = static_cast<views::NativeWidgetWin*>(
+        view_->GetWidget()->native_widget());
+    child_view = widget->GetAccessibilityViewEventAt(child_id);
+  }
+
+  if (!child_view) {
+    // No child found.
+    *disp_child = NULL;
+    return E_FAIL;
+  }
+
+  *disp_child = child_view->GetNativeViewAccessible();
+  (*disp_child)->AddRef();
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accChildCount(LONG* child_count) {
+  if (!child_count || !view_)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  *child_count = view_->child_count();
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accDefaultAction(
+    VARIANT var_id, BSTR* def_action) {
+  if (!IsValidId(var_id) || !def_action)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+  string16 temp_action = state.default_action;
+
+  if (!temp_action.empty()) {
+    *def_action = SysAllocString(temp_action.c_str());
+  } else {
+    return S_FALSE;
+  }
+
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accDescription(
+    VARIANT var_id, BSTR* desc) {
+  if (!IsValidId(var_id) || !desc)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  string16 temp_desc;
+
+  view_->GetTooltipText(gfx::Point(), &temp_desc);
+  if (!temp_desc.empty()) {
+    *desc = SysAllocString(temp_desc.c_str());
+  } else {
+    return S_FALSE;
+  }
+
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accFocus(VARIANT* focus_child) {
+  if (!focus_child)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  views::FocusManager* focus_manager = view_->GetFocusManager();
+  views::View* focus = focus_manager ? focus_manager->GetFocusedView() : NULL;
+  if (focus == view_) {
+    // This view has focus.
+    focus_child->vt = VT_I4;
+    focus_child->lVal = CHILDID_SELF;
+  } else if (focus && view_->Contains(focus)) {
+    // Return the child object that has the keyboard focus.
+    focus_child->pdispVal = focus->GetNativeViewAccessible();
+    focus_child->pdispVal->AddRef();
+    return S_OK;
+  } else {
+    // Neither this object nor any of its children has the keyboard focus.
+    focus_child->vt = VT_EMPTY;
+  }
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accKeyboardShortcut(
+    VARIANT var_id, BSTR* acc_key) {
+  if (!IsValidId(var_id) || !acc_key)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+  string16 temp_key = state.keyboard_shortcut;
+
+  if (!temp_key.empty()) {
+    *acc_key = SysAllocString(temp_key.c_str());
+  } else {
+    return S_FALSE;
+  }
+
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accName(
+    VARIANT var_id, BSTR* name) {
+  if (!IsValidId(var_id) || !name)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  // Retrieve the current view's name.
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+  string16 temp_name = state.name;
+  if (!temp_name.empty()) {
+    // Return name retrieved.
+    *name = SysAllocString(temp_name.c_str());
+  } else {
+    // If view has no name, return S_FALSE.
+    return S_FALSE;
+  }
+
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accParent(
+    IDispatch** disp_parent) {
+  if (!disp_parent)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  views::View* parent_view = view_->parent();
+
+  if (!parent_view) {
+    // This function can get called during teardown of WidetWin so we
+    // should bail out if we fail to get the HWND.
+    if (!view_->GetWidget() || !view_->GetWidget()->GetNativeView()) {
+      *disp_parent = NULL;
+      return S_FALSE;
+    }
+
+    // For a View that has no parent (e.g. root), point the accessible parent
+    // to the default implementation, to interface with Windows' hierarchy
+    // and to support calls from e.g. WindowFromAccessibleObject.
+    HRESULT hr =
+        ::AccessibleObjectFromWindow(view_->GetWidget()->GetNativeView(),
+                                     OBJID_WINDOW, IID_IAccessible,
+                                     reinterpret_cast<void**>(disp_parent));
+
+    if (!SUCCEEDED(hr)) {
+      *disp_parent = NULL;
+      return S_FALSE;
+    }
+
+    return S_OK;
+  }
+
+  *disp_parent = parent_view->GetNativeViewAccessible();
+  (*disp_parent)->AddRef();
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accRole(
+    VARIANT var_id, VARIANT* role) {
+  if (!IsValidId(var_id) || !role)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+  role->vt = VT_I4;
+  role->lVal = MSAARole(state.role);
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accState(
+    VARIANT var_id, VARIANT* state) {
+  // This returns MSAA states. See also the IAccessible2 interface
+  // get_states().
+
+  if (!IsValidId(var_id) || !state)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  state->vt = VT_I4;
+
+  // Retrieve all currently applicable states of the parent.
+  SetState(state, view_);
+
+  // Make sure that state is not empty, and has the proper type.
+  if (state->vt == VT_EMPTY)
+    return E_FAIL;
+
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accValue(
+    VARIANT var_id, BSTR* value) {
+  if (!IsValidId(var_id) || !value)
+    return E_INVALIDARG;
+
+  if (!view_)
+    return E_FAIL;
+
+  // Retrieve the current view's value.
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+  string16 temp_value = state.value;
+
+  if (!temp_value.empty()) {
+    // Return value retrieved.
+    *value = SysAllocString(temp_value.c_str());
+  } else {
+    // If view has no value, fall back into the default implementation.
+    *value = NULL;
+    return E_NOTIMPL;
+  }
+
+  return S_OK;
+}
+
+// IAccessible functions not supported.
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accSelection(VARIANT* selected) {
+  if (selected)
+    selected->vt = VT_EMPTY;
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::accSelect(
+    LONG flagsSelect, VARIANT var_id) {
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accHelp(
+    VARIANT var_id, BSTR* help) {
+  if (help)
+    *help = NULL;
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_accHelpTopic(
+    BSTR* help_file, VARIANT var_id, LONG* topic_id) {
+  if (help_file) {
+    *help_file = NULL;
+  }
+  if (topic_id) {
+    *topic_id = static_cast<LONG>(-1);
+  }
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::put_accName(
+    VARIANT var_id, BSTR put_name) {
+  // Deprecated.
+  return E_NOTIMPL;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::put_accValue(
+    VARIANT var_id, BSTR put_val) {
+  // Deprecated.
+  return E_NOTIMPL;
+}
+
+//
+// IAccessible2
+//
+
+STDMETHODIMP NativeViewAccessibilityWin::role(LONG* role) {
+  if (!view_)
+    return E_FAIL;
+
+  if (!role)
+    return E_INVALIDARG;
+
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+  *role = MSAARole(state.role);
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_states(AccessibleStates* states) {
+  // This returns IAccessible2 states, which supplement MSAA states.
+  // See also the MSAA interface get_accState.
+
+  if (!view_)
+    return E_FAIL;
+
+  if (!states)
+    return E_INVALIDARG;
+
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+
+  // 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 (state.state & AccessibilityTypes::STATE_EDITABLE)
+    *states |= IA2_STATE_EDITABLE;
+
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_uniqueID(LONG* unique_id) {
+  if (!view_)
+    return E_FAIL;
+
+  if (!unique_id)
+    return E_INVALIDARG;
+
+  *unique_id = unique_id_;
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_windowHandle(HWND* window_handle) {
+  if (!view_)
+    return E_FAIL;
+
+  if (!window_handle)
+    return E_INVALIDARG;
+
+  *window_handle = view_->GetWidget()->GetNativeView();
+  return S_OK;
+}
+
+//
+// IAccessibleText
+//
+
+STDMETHODIMP NativeViewAccessibilityWin::get_nCharacters(LONG* n_characters) {
+  if (!view_)
+    return E_FAIL;
+
+  if (!n_characters)
+    return E_INVALIDARG;
+
+  string16 text = TextForIAccessibleText();
+  *n_characters = static_cast<LONG>(text.size());
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_caretOffset(LONG* offset) {
+  if (!view_)
+    return E_FAIL;
+
+  if (!offset)
+    return E_INVALIDARG;
+
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+  *offset = static_cast<LONG>(state.selection_end);
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_nSelections(LONG* n_selections) {
+  if (!view_)
+    return E_FAIL;
+
+  if (!n_selections)
+    return E_INVALIDARG;
+
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+  if (state.selection_start != state.selection_end)
+    *n_selections = 1;
+  else
+    *n_selections = 0;
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_selection(LONG selection_index,
+                                                      LONG* start_offset,
+                                                      LONG* end_offset) {
+  if (!view_)
+    return E_FAIL;
+
+  if (!start_offset || !end_offset || selection_index != 0)
+    return E_INVALIDARG;
+
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+  *start_offset = static_cast<LONG>(state.selection_start);
+  *end_offset = static_cast<LONG>(state.selection_end);
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_text(LONG start_offset,
+                                                  LONG end_offset,
+                                                  BSTR* text) {
+  if (!view_)
+    return E_FAIL;
+
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+  string16 text_str = TextForIAccessibleText();
+  LONG len = static_cast<LONG>(text_str.size());
+
+  if (start_offset == IA2_TEXT_OFFSET_LENGTH) {
+    start_offset = len;
+  } else if (start_offset == IA2_TEXT_OFFSET_CARET) {
+    start_offset = static_cast<LONG>(state.selection_end);
+  }
+  if (end_offset == IA2_TEXT_OFFSET_LENGTH) {
+    end_offset = static_cast<LONG>(text_str.size());
+  } else if (end_offset == IA2_TEXT_OFFSET_CARET) {
+    end_offset = static_cast<LONG>(state.selection_end);
+  }
+
+  // The spec allows the arguments to be reversed.
+  if (start_offset > end_offset) {
+    LONG tmp = start_offset;
+    start_offset = end_offset;
+    end_offset = tmp;
+  }
+
+  // The spec does not allow the start or end offsets to be out or range;
+  // we must return an error if so.
+  if (start_offset < 0)
+    return E_INVALIDARG;
+  if (end_offset > len)
+    return E_INVALIDARG;
+
+  string16 substr = text_str.substr(start_offset, end_offset - start_offset);
+  if (substr.empty())
+    return S_FALSE;
+
+  *text = SysAllocString(substr.c_str());
+  DCHECK(*text);
+  return S_OK;
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_textAtOffset(
+    LONG offset,
+    enum IA2TextBoundaryType boundary_type,
+    LONG* start_offset, LONG* end_offset,
+    BSTR* text) {
+  if (!start_offset || !end_offset || !text)
+    return E_INVALIDARG;
+
+  // The IAccessible2 spec says we don't have to implement the "sentence"
+  // boundary type, we can just let the screenreader handle it.
+  if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
+    *start_offset = 0;
+    *end_offset = 0;
+    *text = NULL;
+    return S_FALSE;
+  }
+
+  const string16& text_str = TextForIAccessibleText();
+
+  *start_offset = FindBoundary(
+      text_str, boundary_type, offset, ui::BACKWARDS_DIRECTION);
+  *end_offset = FindBoundary(
+      text_str, boundary_type, offset, ui::FORWARDS_DIRECTION);
+  return get_text(*start_offset, *end_offset, text);
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_textBeforeOffset(
+    LONG offset,
+    enum IA2TextBoundaryType boundary_type,
+    LONG* start_offset, LONG* end_offset,
+    BSTR* text) {
+  if (!start_offset || !end_offset || !text)
+    return E_INVALIDARG;
+
+  // The IAccessible2 spec says we don't have to implement the "sentence"
+  // boundary type, we can just let the screenreader handle it.
+  if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
+    *start_offset = 0;
+    *end_offset = 0;
+    *text = NULL;
+    return S_FALSE;
+  }
+
+  const string16& text_str = TextForIAccessibleText();
+
+  *start_offset = FindBoundary(
+      text_str, boundary_type, offset, ui::BACKWARDS_DIRECTION);
+  *end_offset = offset;
+  return get_text(*start_offset, *end_offset, text);
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_textAfterOffset(
+    LONG offset,
+    enum IA2TextBoundaryType boundary_type,
+    LONG* start_offset, LONG* end_offset,
+    BSTR* text) {
+  if (!start_offset || !end_offset || !text)
+    return E_INVALIDARG;
+
+  // The IAccessible2 spec says we don't have to implement the "sentence"
+  // boundary type, we can just let the screenreader handle it.
+  if (boundary_type == IA2_TEXT_BOUNDARY_SENTENCE) {
+    *start_offset = 0;
+    *end_offset = 0;
+    *text = NULL;
+    return S_FALSE;
+  }
+
+  const string16& text_str = TextForIAccessibleText();
+
+  *start_offset = offset;
+  *end_offset = FindBoundary(
+      text_str, boundary_type, offset, ui::FORWARDS_DIRECTION);
+  return get_text(*start_offset, *end_offset, text);
+}
+
+STDMETHODIMP NativeViewAccessibilityWin::get_offsetAtPoint(
+    LONG x, LONG y, enum IA2CoordinateType coord_type, LONG* offset) {
+  if (!view_)
+    return E_FAIL;
+
+  if (!offset)
+    return E_INVALIDARG;
+
+  // We don't support this method, but we have to return something
+  // rather than E_NOTIMPL or screen readers will complain.
+  *offset = 0;
+  return S_OK;
+}
+
+//
+// IServiceProvider methods.
+//
+
+STDMETHODIMP NativeViewAccessibilityWin::QueryService(
+    REFGUID guidService, REFIID riid, void** object) {
+  if (!view_)
+    return E_FAIL;
+
+  if (guidService == IID_IAccessible ||
+      guidService == IID_IAccessible2 ||
+      guidService == IID_IAccessibleText) {
+    return QueryInterface(riid, object);
+  }
+
+  *object = NULL;
+  return E_FAIL;
+}
+
+//
+// Static methods.
+//
+
+int32 NativeViewAccessibilityWin::MSAAEvent(AccessibilityTypes::Event event) {
+  switch (event) {
+    case AccessibilityTypes::EVENT_ALERT:
+      return EVENT_SYSTEM_ALERT;
+    case AccessibilityTypes::EVENT_FOCUS:
+      return EVENT_OBJECT_FOCUS;
+    case AccessibilityTypes::EVENT_MENUSTART:
+      return EVENT_SYSTEM_MENUSTART;
+    case AccessibilityTypes::EVENT_MENUEND:
+      return EVENT_SYSTEM_MENUEND;
+    case AccessibilityTypes::EVENT_MENUPOPUPSTART:
+      return EVENT_SYSTEM_MENUPOPUPSTART;
+    case AccessibilityTypes::EVENT_MENUPOPUPEND:
+      return EVENT_SYSTEM_MENUPOPUPEND;
+    case AccessibilityTypes::EVENT_NAME_CHANGED:
+      return EVENT_OBJECT_NAMECHANGE;
+    case AccessibilityTypes::EVENT_TEXT_CHANGED:
+      return EVENT_OBJECT_VALUECHANGE;
+    case AccessibilityTypes::EVENT_SELECTION_CHANGED:
+      return IA2_EVENT_TEXT_CARET_MOVED;
+    case AccessibilityTypes::EVENT_VALUE_CHANGED:
+      return EVENT_OBJECT_VALUECHANGE;
+    default:
+      // Not supported or invalid event.
+      NOTREACHED();
+      return -1;
+  }
+}
+
+int32 NativeViewAccessibilityWin::MSAARole(AccessibilityTypes::Role role) {
+  switch (role) {
+    case AccessibilityTypes::ROLE_ALERT:
+return ROLE_SYSTEM_ALERT;
+    case AccessibilityTypes::ROLE_APPLICATION:
+      return ROLE_SYSTEM_APPLICATION;
+    case AccessibilityTypes::ROLE_BUTTONDROPDOWN:
+      return ROLE_SYSTEM_BUTTONDROPDOWN;
+    case AccessibilityTypes::ROLE_BUTTONMENU:
+      return ROLE_SYSTEM_BUTTONMENU;
+    case AccessibilityTypes::ROLE_CHECKBUTTON:
+      return ROLE_SYSTEM_CHECKBUTTON;
+    case AccessibilityTypes::ROLE_COMBOBOX:
+      return ROLE_SYSTEM_COMBOBOX;
+    case AccessibilityTypes::ROLE_DIALOG:
+      return ROLE_SYSTEM_DIALOG;
+    case AccessibilityTypes::ROLE_GRAPHIC:
+      return ROLE_SYSTEM_GRAPHIC;
+    case AccessibilityTypes::ROLE_GROUPING:
+      return ROLE_SYSTEM_GROUPING;
+    case AccessibilityTypes::ROLE_LINK:
+      return ROLE_SYSTEM_LINK;
+    case AccessibilityTypes::ROLE_LOCATION_BAR:
+      return ROLE_SYSTEM_GROUPING;
+    case AccessibilityTypes::ROLE_MENUBAR:
+      return ROLE_SYSTEM_MENUBAR;
+    case AccessibilityTypes::ROLE_MENUITEM:
+      return ROLE_SYSTEM_MENUITEM;
+    case AccessibilityTypes::ROLE_MENUPOPUP:
+      return ROLE_SYSTEM_MENUPOPUP;
+    case AccessibilityTypes::ROLE_OUTLINE:
+      return ROLE_SYSTEM_OUTLINE;
+    case AccessibilityTypes::ROLE_OUTLINEITEM:
+      return ROLE_SYSTEM_OUTLINEITEM;
+    case AccessibilityTypes::ROLE_PAGETAB:
+      return ROLE_SYSTEM_PAGETAB;
+    case AccessibilityTypes::ROLE_PAGETABLIST:
+      return ROLE_SYSTEM_PAGETABLIST;
+    case AccessibilityTypes::ROLE_PANE:
+      return ROLE_SYSTEM_PANE;
+    case AccessibilityTypes::ROLE_PROGRESSBAR:
+      return ROLE_SYSTEM_PROGRESSBAR;
+    case AccessibilityTypes::ROLE_PUSHBUTTON:
+      return ROLE_SYSTEM_PUSHBUTTON;
+    case AccessibilityTypes::ROLE_RADIOBUTTON:
+      return ROLE_SYSTEM_RADIOBUTTON;
+    case AccessibilityTypes::ROLE_SCROLLBAR:
+      return ROLE_SYSTEM_SCROLLBAR;
+    case AccessibilityTypes::ROLE_SEPARATOR:
+      return ROLE_SYSTEM_SEPARATOR;
+    case AccessibilityTypes::ROLE_STATICTEXT:
+      return ROLE_SYSTEM_STATICTEXT;
+    case AccessibilityTypes::ROLE_TEXT:
+      return ROLE_SYSTEM_TEXT;
+    case AccessibilityTypes::ROLE_TITLEBAR:
+      return ROLE_SYSTEM_TITLEBAR;
+    case AccessibilityTypes::ROLE_TOOLBAR:
+      return ROLE_SYSTEM_TOOLBAR;
+    case AccessibilityTypes::ROLE_WINDOW:
+      return ROLE_SYSTEM_WINDOW;
+    case AccessibilityTypes::ROLE_CLIENT:
+    default:
+      // This is the default role for MSAA.
+      return ROLE_SYSTEM_CLIENT;
+  }
+}
+
+int32 NativeViewAccessibilityWin::MSAAState(AccessibilityTypes::State state) {
+  // This maps MSAA states for get_accState(). See also the IAccessible2
+  // interface get_states().
+
+  int32 msaa_state = 0;
+  if (state & AccessibilityTypes::STATE_CHECKED)
+    msaa_state |= STATE_SYSTEM_CHECKED;
+  if (state & AccessibilityTypes::STATE_COLLAPSED)
+    msaa_state |= STATE_SYSTEM_COLLAPSED;
+  if (state & AccessibilityTypes::STATE_DEFAULT)
+    msaa_state |= STATE_SYSTEM_DEFAULT;
+  if (state & AccessibilityTypes::STATE_EXPANDED)
+    msaa_state |= STATE_SYSTEM_EXPANDED;
+  if (state & AccessibilityTypes::STATE_HASPOPUP)
+    msaa_state |= STATE_SYSTEM_HASPOPUP;
+  if (state & AccessibilityTypes::STATE_HOTTRACKED)
+    msaa_state |= STATE_SYSTEM_HOTTRACKED;
+  if (state & AccessibilityTypes::STATE_INVISIBLE)
+    msaa_state |= STATE_SYSTEM_INVISIBLE;
+  if (state & AccessibilityTypes::STATE_LINKED)
+    msaa_state |= STATE_SYSTEM_LINKED;
+  if (state & AccessibilityTypes::STATE_OFFSCREEN)
+    msaa_state |= STATE_SYSTEM_OFFSCREEN;
+  if (state & AccessibilityTypes::STATE_PRESSED)
+    msaa_state |= STATE_SYSTEM_PRESSED;
+  if (state & AccessibilityTypes::STATE_PROTECTED)
+    msaa_state |= STATE_SYSTEM_PROTECTED;
+  if (state & AccessibilityTypes::STATE_READONLY)
+    msaa_state |= STATE_SYSTEM_READONLY;
+  if (state & AccessibilityTypes::STATE_SELECTED)
+    msaa_state |= STATE_SYSTEM_SELECTED;
+  if (state & AccessibilityTypes::STATE_FOCUSED)
+    msaa_state |= STATE_SYSTEM_FOCUSED;
+  if (state & AccessibilityTypes::STATE_UNAVAILABLE)
+    msaa_state |= STATE_SYSTEM_UNAVAILABLE;
+  return msaa_state;
+}
+
+//
+// Private methods.
+//
+
+bool NativeViewAccessibilityWin::IsNavDirNext(int nav_dir) const {
+  return (nav_dir == NAVDIR_RIGHT ||
+          nav_dir == NAVDIR_DOWN ||
+          nav_dir == NAVDIR_NEXT);
+}
+
+bool NativeViewAccessibilityWin::IsValidNav(
+    int nav_dir, int start_id, int lower_bound, int upper_bound) const {
+  if (IsNavDirNext(nav_dir)) {
+    if ((start_id + 1) > upper_bound) {
+      return false;
+    }
+  } else {
+    if ((start_id - 1) <= lower_bound) {
+      return false;
+    }
+  }
+  return true;
+}
+
+bool NativeViewAccessibilityWin::IsValidId(const VARIANT& child) const {
+  // View accessibility returns an IAccessible for each view so we only support
+  // the CHILDID_SELF id.
+  return (VT_I4 == child.vt) && (CHILDID_SELF == child.lVal);
+}
+
+void NativeViewAccessibilityWin::SetState(
+    VARIANT* msaa_state, views::View* view) {
+  // Ensure the output param is initialized to zero.
+  msaa_state->lVal = 0;
+
+  // Default state; all views can have accessibility focus.
+  msaa_state->lVal |= STATE_SYSTEM_FOCUSABLE;
+
+  if (!view)
+    return;
+
+  if (!view->IsEnabled())
+    msaa_state->lVal |= STATE_SYSTEM_UNAVAILABLE;
+  if (!view->IsVisible())
+    msaa_state->lVal |= STATE_SYSTEM_INVISIBLE;
+  if (view->IsHotTracked())
+    msaa_state->lVal |= STATE_SYSTEM_HOTTRACKED;
+  if (view->HasFocus())
+    msaa_state->lVal |= STATE_SYSTEM_FOCUSED;
+
+  // Add on any view-specific states.
+  ui::AccessibleViewState view_state;
+  view->GetAccessibleState(&view_state);
+  msaa_state->lVal |= MSAAState(view_state.state);
+}
+
+string16 NativeViewAccessibilityWin::TextForIAccessibleText() {
+  ui::AccessibleViewState state;
+  view_->GetAccessibleState(&state);
+  if (state.role == AccessibilityTypes::ROLE_TEXT)
+    return state.value;
+  else
+    return state.name;
+}
+
+void NativeViewAccessibilityWin::HandleSpecialTextOffset(
+    const string16& text, LONG* offset) {
+  if (*offset == IA2_TEXT_OFFSET_LENGTH) {
+    *offset = static_cast<LONG>(text.size());
+  } else if (*offset == IA2_TEXT_OFFSET_CARET) {
+    get_caretOffset(offset);
+  }
+}
+
+ui::TextBoundaryType NativeViewAccessibilityWin::IA2TextBoundaryToTextBoundary(
+    IA2TextBoundaryType ia2_boundary) {
+  switch(ia2_boundary) {
+    case IA2_TEXT_BOUNDARY_CHAR: return ui::CHAR_BOUNDARY;
+    case IA2_TEXT_BOUNDARY_WORD: return ui::WORD_BOUNDARY;
+    case IA2_TEXT_BOUNDARY_LINE: return ui::LINE_BOUNDARY;
+    case IA2_TEXT_BOUNDARY_SENTENCE: return ui::SENTENCE_BOUNDARY;
+    case IA2_TEXT_BOUNDARY_PARAGRAPH: return ui::PARAGRAPH_BOUNDARY;
+    case IA2_TEXT_BOUNDARY_ALL: return ui::ALL_BOUNDARY;
+    default:
+      NOTREACHED();
+      return ui::CHAR_BOUNDARY;
+  }
+}
+
+LONG NativeViewAccessibilityWin::FindBoundary(
+    const string16& text,
+    IA2TextBoundaryType ia2_boundary,
+    LONG start_offset,
+    ui::TextBoundaryDirection direction) {
+  HandleSpecialTextOffset(text, &start_offset);
+  ui::TextBoundaryType boundary = IA2TextBoundaryToTextBoundary(ia2_boundary);
+  std::vector<int32> line_breaks;
+  return ui::FindAccessibleTextBoundary(
+      text, line_breaks, boundary, start_offset, direction);
+}
diff --git a/ui/views/accessibility/native_view_accessibility_win.h b/ui/views/accessibility/native_view_accessibility_win.h
new file mode 100644
index 0000000..854f023
--- /dev/null
+++ b/ui/views/accessibility/native_view_accessibility_win.h
@@ -0,0 +1,355 @@
+// Copyright (c) 2011 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 VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_WIN_H_
+#define VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_WIN_H_
+#pragma once
+
+#include <atlbase.h>
+#include <atlcom.h>
+
+#include <oleacc.h>
+
+#include "base/memory/scoped_ptr.h"
+#include "third_party/iaccessible2/ia2_api_all.h"
+#include "ui/base/accessibility/accessible_view_state.h"
+#include "views/controls/native/native_view_host.h"
+#include "views/view.h"
+
+namespace ui {
+enum TextBoundaryDirection;
+enum TextBoundaryType;
+}
+
+// Note: do not put NativeViewAccessibilityWin in the namespace "views";
+// Visual Studio 2005 does not allow an ATL::CComObject symbol in a namespace.
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// NativeViewAccessibilityWin
+//
+// Class implementing the MSAA IAccessible COM interface for a generic View,
+// providing accessibility to be used by screen readers and other assistive
+// technology (AT).
+//
+////////////////////////////////////////////////////////////////////////////////
+class __declspec(uuid("26f5641a-246d-457b-a96d-07f3fae6acf2"))
+NativeViewAccessibilityWin
+  : public CComObjectRootEx<CComMultiThreadModel>,
+    public IDispatchImpl<IAccessible2, &IID_IAccessible2,
+                           &LIBID_IAccessible2Lib>,
+    public IAccessibleText,
+    public IServiceProvider {
+ public:
+  BEGIN_COM_MAP(NativeViewAccessibilityWin)
+    COM_INTERFACE_ENTRY2(IDispatch, IAccessible2)
+    COM_INTERFACE_ENTRY2(IAccessible, IAccessible2)
+    COM_INTERFACE_ENTRY(IAccessible2)
+    COM_INTERFACE_ENTRY(IAccessibleText)
+    COM_INTERFACE_ENTRY(IServiceProvider)
+  END_COM_MAP()
+
+  // Create method for view accessibility.
+  static scoped_refptr<NativeViewAccessibilityWin> Create(views::View* view);
+
+  virtual ~NativeViewAccessibilityWin();
+
+  void set_view(views::View* view) { view_ = view; }
+
+  // Supported IAccessible methods.
+
+  // Retrieves the child element or child object at a given point on the screen.
+  STDMETHODIMP accHitTest(LONG x_left, LONG y_top, VARIANT* child);
+
+  // Performs the object's default action.
+  STDMETHODIMP accDoDefaultAction(VARIANT var_id);
+
+  // Retrieves the specified object's current screen location.
+  STDMETHODIMP accLocation(LONG* x_left,
+                           LONG* y_top,
+                           LONG* width,
+                           LONG* height,
+                           VARIANT var_id);
+
+  // Traverses to another UI element and retrieves the object.
+  STDMETHODIMP accNavigate(LONG nav_dir, VARIANT start, VARIANT* end);
+
+  // Retrieves an IDispatch interface pointer for the specified child.
+  STDMETHODIMP get_accChild(VARIANT var_child, IDispatch** disp_child);
+
+  // Retrieves the number of accessible children.
+  STDMETHODIMP get_accChildCount(LONG* child_count);
+
+  // Retrieves a string that describes the object's default action.
+  STDMETHODIMP get_accDefaultAction(VARIANT var_id, BSTR* default_action);
+
+  // Retrieves the tooltip description.
+  STDMETHODIMP get_accDescription(VARIANT var_id, BSTR* desc);
+
+  // Retrieves the object that has the keyboard focus.
+  STDMETHODIMP get_accFocus(VARIANT* focus_child);
+
+  // Retrieves the specified object's shortcut.
+  STDMETHODIMP get_accKeyboardShortcut(VARIANT var_id, BSTR* access_key);
+
+  // Retrieves the name of the specified object.
+  STDMETHODIMP get_accName(VARIANT var_id, BSTR* name);
+
+  // Retrieves the IDispatch interface of the object's parent.
+  STDMETHODIMP get_accParent(IDispatch** disp_parent);
+
+  // Retrieves information describing the role of the specified object.
+  STDMETHODIMP get_accRole(VARIANT var_id, VARIANT* role);
+
+  // Retrieves the current state of the specified object.
+  STDMETHODIMP get_accState(VARIANT var_id, VARIANT* state);
+
+  // Retrieves the current value associated with the specified object.
+  STDMETHODIMP get_accValue(VARIANT var_id, BSTR* value);
+
+  // Non-supported IAccessible methods.
+
+  // Selections not applicable to views.
+  STDMETHODIMP get_accSelection(VARIANT* selected);
+  STDMETHODIMP accSelect(LONG flags_sel, VARIANT var_id);
+
+  // Help functions not supported.
+  STDMETHODIMP get_accHelp(VARIANT var_id, BSTR* help);
+  STDMETHODIMP get_accHelpTopic(BSTR* help_file,
+                                VARIANT var_id,
+                                LONG* topic_id);
+
+  // Deprecated functions, not implemented here.
+  STDMETHODIMP put_accName(VARIANT var_id, BSTR put_name);
+  STDMETHODIMP put_accValue(VARIANT var_id, BSTR put_val);
+
+  //
+  // IAccessible2
+  //
+
+  STDMETHODIMP role(LONG* role);
+
+  STDMETHODIMP get_states(AccessibleStates* states);
+
+  STDMETHODIMP get_uniqueID(LONG* unique_id);
+
+  STDMETHODIMP get_windowHandle(HWND* window_handle);
+
+  //
+  // IAccessible2 methods not implemented.
+  //
+
+  STDMETHODIMP get_attributes(BSTR* attributes) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_indexInParent(LONG* index_in_parent) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_extendedRole(BSTR* extended_role) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_nRelations(LONG* n_relations) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_relation(LONG relation_index,
+                            IAccessibleRelation** relation) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_relations(LONG max_relations,
+      IAccessibleRelation** relations,
+      LONG* n_relations) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP scrollTo(enum IA2ScrollType scroll_type) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP scrollToPoint(
+      enum IA2CoordinateType coordinate_type,
+      LONG x,
+      LONG y) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_groupPosition(LONG* group_level,
+                                 LONG* similar_items_in_group,
+                                 LONG* position_in_group) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_localizedExtendedRole(
+      BSTR* localized_extended_role) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_nExtendedStates(LONG* n_extended_states) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_extendedStates(LONG max_extended_states,
+                                  BSTR** extended_states,
+                                  LONG* n_extended_states) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_localizedExtendedStates(
+      LONG max_localized_extended_states,
+      BSTR** localized_extended_states,
+      LONG* n_localized_extended_states) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_locale(IA2Locale* locale) {
+    return E_NOTIMPL;
+  }
+
+  //
+  // IAccessibleText methods.
+  //
+
+  STDMETHODIMP get_nCharacters(LONG* n_characters);
+
+  STDMETHODIMP get_caretOffset(LONG* offset);
+
+  STDMETHODIMP get_nSelections(LONG* n_selections);
+
+  STDMETHODIMP get_selection(LONG selection_index,
+                             LONG* start_offset,
+                             LONG* end_offset);
+
+  STDMETHODIMP get_text(LONG start_offset, LONG end_offset, BSTR* text);
+
+  STDMETHODIMP get_textAtOffset(LONG offset,
+                                enum IA2TextBoundaryType boundary_type,
+                                LONG* start_offset, LONG* end_offset,
+                                BSTR* text);
+
+  STDMETHODIMP get_textBeforeOffset(LONG offset,
+                                    enum IA2TextBoundaryType boundary_type,
+                                    LONG* start_offset, LONG* end_offset,
+                                    BSTR* text);
+
+  STDMETHODIMP get_textAfterOffset(LONG offset,
+                                   enum IA2TextBoundaryType boundary_type,
+                                   LONG* start_offset, LONG* end_offset,
+                                   BSTR* text);
+
+  STDMETHODIMP get_offsetAtPoint(LONG x, LONG y,
+      enum IA2CoordinateType coord_type,
+      LONG* offset);
+
+  //
+  // IAccessibleText methods not implemented.
+  //
+
+  STDMETHODIMP get_newText(IA2TextSegment* new_text) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_oldText(IA2TextSegment* old_text) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP addSelection(LONG start_offset, LONG end_offset) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_attributes(LONG offset,
+                              LONG* start_offset,
+                              LONG* end_offset,
+                              BSTR* text_attributes) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP get_characterExtents(LONG offset,
+      enum IA2CoordinateType coord_type,
+      LONG* x, LONG* y,
+      LONG* width, LONG* height) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP removeSelection(LONG selection_index) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP setCaretOffset(LONG offset) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP setSelection(LONG selection_index,
+                            LONG start_offset,
+                            LONG end_offset) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP scrollSubstringTo(LONG start_index,
+                                 LONG end_index,
+                                 enum IA2ScrollType scroll_type) {
+    return E_NOTIMPL;
+  }
+  STDMETHODIMP scrollSubstringToPoint(LONG start_index,
+      LONG end_index,
+      enum IA2CoordinateType coordinate_type,
+      LONG x, LONG y) {
+    return E_NOTIMPL;
+  }
+
+  //
+  // IServiceProvider methods.
+  //
+
+  STDMETHODIMP QueryService(REFGUID guidService, REFIID riid, void** object);
+
+  // Returns a conversion from the event (as defined in accessibility_types.h)
+  // to an MSAA event.
+  static int32 MSAAEvent(ui::AccessibilityTypes::Event event);
+
+  // Returns a conversion from the Role (as defined in accessibility_types.h)
+  // to an MSAA role.
+  static int32 MSAARole(ui::AccessibilityTypes::Role role);
+
+  // Returns a conversion from the State (as defined in accessibility_types.h)
+  // to MSAA states set.
+  static int32 MSAAState(ui::AccessibilityTypes::State state);
+
+ private:
+  NativeViewAccessibilityWin();
+
+  // Determines navigation direction for accNavigate, based on left, up and
+  // previous being mapped all to previous and right, down, next being mapped
+  // to next. Returns true if navigation direction is next, false otherwise.
+  bool IsNavDirNext(int nav_dir) const;
+
+  // Determines if the navigation target is within the allowed bounds. Returns
+  // true if it is, false otherwise.
+  bool IsValidNav(int nav_dir,
+                  int start_id,
+                  int lower_bound,
+                  int upper_bound) const;
+
+  // Determines if the child id variant is valid.
+  bool IsValidId(const VARIANT& child) const;
+
+  // Helper function which sets applicable states of view.
+  void SetState(VARIANT* msaa_state, views::View* view);
+
+  // Return the text to use for IAccessibleText.
+  string16 TextForIAccessibleText();
+
+  // If offset is a member of IA2TextSpecialOffsets this function updates the
+  // value of offset and returns, otherwise offset remains unchanged.
+  void HandleSpecialTextOffset(const string16& text, LONG* offset);
+
+  // Convert from a IA2TextBoundaryType to a ui::TextBoundaryType.
+  ui::TextBoundaryType IA2TextBoundaryToTextBoundary(IA2TextBoundaryType type);
+
+  // Search forwards (direction == 1) or backwards (direction == -1)
+  // from the given offset until the given boundary is found, and
+  // return the offset of that boundary.
+  LONG FindBoundary(const string16& text,
+                    IA2TextBoundaryType ia2_boundary,
+                    LONG start_offset,
+                    ui::TextBoundaryDirection direction);
+
+  // Give CComObject access to the class constructor.
+  template <class Base> friend class CComObject;
+
+  // Member View needed for view-specific calls.
+  views::View* view_;
+
+  // A unique id for each object, needed for IAccessible2.
+  long unique_id_;
+
+  // Next unique id to assign.
+  static long next_unique_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(NativeViewAccessibilityWin);
+};
+
+#endif  // VIEWS_ACCESSIBILITY_NATIVE_VIEW_ACCESSIBILITY_WIN_H_