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

views/accessibility/native_view_accessibility_win.cc

Index: views/accessibility/native_view_accessibility_win.cc
diff --git a/views/accessibility/native_view_accessibility_win.cc b/views/accessibility/native_view_accessibility_win.cc
deleted file mode 100644
index 1c7bddda65e1c05166404f1d80c2ba4273120c6c..0000000000000000000000000000000000000000
--- a/views/accessibility/native_view_accessibility_win.cc
+++ /dev/null
@@ -1,1030 +0,0 @@
-// 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 <atlbase.h>
-#include <atlcom.h>
-
-#include <vector>
-
-#include "views/accessibility/native_view_accessibility_win.h"
-
-#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);
-}