Make BrowserAccessibilityManager cross platform. Step 1....

chrome/browser/browser_accessibility_win.cc

Index: chrome/browser/browser_accessibility_win.cc
===================================================================
--- chrome/browser/browser_accessibility_win.cc	(revision 61015)
+++ chrome/browser/browser_accessibility_win.cc	(working copy)
@@ -1,1386 +0,0 @@
-// Copyright (c) 2010 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 "chrome/browser/browser_accessibility_win.h"
-
-#include "base/logging.h"
-#include "base/string_util.h"
-#include "base/utf_string_conversions.h"
-#include "chrome/browser/browser_accessibility_manager_win.h"
-#include "net/base/escape.h"
-
-using webkit_glue::WebAccessibility;
-
-BrowserAccessibility::BrowserAccessibility()
-    : manager_(NULL),
-      parent_(NULL),
-      child_id_(-1),
-      index_in_parent_(-1),
-      renderer_id_(-1),
-      instance_active_(false) {
-}
-
-BrowserAccessibility::~BrowserAccessibility() {
-  InactivateTree();
-}
-
-void BrowserAccessibility::Initialize(
-    BrowserAccessibilityManager* manager,
-    BrowserAccessibility* parent,
-    LONG child_id,
-    LONG index_in_parent,
-    const webkit_glue::WebAccessibility& src) {
-  DCHECK_EQ(children_.size(), 0U);
-
-  manager_ = manager;
-  parent_ = parent;
-  child_id_ = child_id;
-  index_in_parent_ = index_in_parent;
-
-  renderer_id_ = src.id;
-  name_ = src.name;
-  value_ = src.value;
-  attributes_ = src.attributes;
-  html_attributes_ = src.html_attributes;
-  location_ = src.location;
-  InitRoleAndState(src.role, src.state);
-
-  // Expose headings levels to NVDA with the "level" object attribute.
-  if (src.role == WebAccessibility::ROLE_HEADING && role_name_.size() == 2 &&
-          IsAsciiDigit(role_name_[1])) {
-    html_attributes_.push_back(std::make_pair(L"level", role_name_.substr(1)));
-  }
-
-  // If this object doesn't have a name but it does have a description,
-  // use the description as its name - because some screen readers only
-  // announce the name.
-  if (name_.empty() && HasAttribute(WebAccessibility::ATTR_DESCRIPTION)) {
-    GetAttribute(WebAccessibility::ATTR_DESCRIPTION, &name_);
-  }
-
-  instance_active_ = true;
-}
-
-void BrowserAccessibility::AddChild(BrowserAccessibility* child) {
-  children_.push_back(child);
-}
-
-void BrowserAccessibility::InactivateTree() {
-  if (!instance_active_)
-    return;
-
-  // Mark this object as inactive, so calls to all COM methods will return
-  // failure.
-  instance_active_ = false;
-
-  // Now we can safely call InactivateTree on our children and remove
-  // references to them, so that as much of the tree as possible will be
-  // destroyed now - however, nodes that still have references to them
-  // might stick around a while until all clients have released them.
-  for (std::vector<BrowserAccessibility*>::iterator iter =
-           children_.begin();
-       iter != children_.end(); ++iter) {
-    (*iter)->InactivateTree();
-    (*iter)->Release();
-  }
-  children_.clear();
-  manager_->Remove(child_id_);
-}
-
-bool BrowserAccessibility::IsDescendantOf(BrowserAccessibility* ancestor) {
-  if (this == ancestor) {
-    return true;
-  } else if (parent_) {
-    return parent_->IsDescendantOf(ancestor);
-  }
-
-  return false;
-}
-
-BrowserAccessibility* BrowserAccessibility::GetParent() {
-  return parent_;
-}
-
-uint32 BrowserAccessibility::GetChildCount() {
-  return children_.size();
-}
-
-BrowserAccessibility* BrowserAccessibility::GetPreviousSibling() {
-  if (parent_ && index_in_parent_ > 0)
-    return parent_->children_[index_in_parent_ - 1];
-
-  return NULL;
-}
-
-BrowserAccessibility* BrowserAccessibility::GetNextSibling() {
-  if (parent_ &&
-      index_in_parent_ >= 0 &&
-      index_in_parent_ < static_cast<int>(parent_->children_.size() - 1)) {
-    return parent_->children_[index_in_parent_ + 1];
-  }
-
-  return NULL;
-}
-
-void BrowserAccessibility::ReplaceChild(
-    const BrowserAccessibility* old_acc, BrowserAccessibility* new_acc) {
-  DCHECK_EQ(children_[old_acc->index_in_parent_], old_acc);
-
-  old_acc = children_[old_acc->index_in_parent_];
-  children_[old_acc->index_in_parent_] = new_acc;
-}
-
-BrowserAccessibility* BrowserAccessibility::NewReference() {
-  AddRef();
-  return this;
-}
-
-//
-// IAccessible methods.
-//
-// Conventions:
-// * Always test for instance_active_ first and return E_FAIL if it's false.
-// * Always check for invalid arguments first, even if they're unused.
-// * Return S_FALSE if the only output is a string argument and it's empty.
-//
-
-HRESULT BrowserAccessibility::accDoDefaultAction(VARIANT var_id) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  BrowserAccessibility* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  manager_->DoDefaultAction(*target);
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::accHitTest(LONG x_left, LONG y_top,
-                                              VARIANT* child) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!child)
-    return E_INVALIDARG;
-
-  return E_NOTIMPL;
-}
-
-STDMETHODIMP BrowserAccessibility::accLocation(LONG* x_left, LONG* y_top,
-                                               LONG* width, LONG* height,
-                                               VARIANT var_id) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!x_left || !y_top || !width || !height)
-    return E_INVALIDARG;
-
-  BrowserAccessibility* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  // Find the top left corner of the containing window in screen coords, and
-  // adjust the output position by this amount.
-  HWND parent_hwnd = manager_->GetParentHWND();
-  POINT top_left = {0, 0};
-  ::ClientToScreen(parent_hwnd, &top_left);
-
-  *x_left = target->location_.x + top_left.x;
-  *y_top  = target->location_.y + top_left.y;
-  *width  = target->location_.width;
-  *height = target->location_.height;
-
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::accNavigate(
-    LONG nav_dir, VARIANT start, VARIANT* end) {
-  BrowserAccessibility* target = GetTargetFromChildID(start);
-  if (!target)
-    return E_INVALIDARG;
-
-  if ((nav_dir == NAVDIR_LASTCHILD || nav_dir == NAVDIR_FIRSTCHILD) &&
-      start.lVal != CHILDID_SELF) {
-    // MSAA states that navigating to first/last child can only be from self.
-    return E_INVALIDARG;
-  }
-
-  BrowserAccessibility* result = NULL;
-  switch (nav_dir) {
-    case NAVDIR_DOWN:
-    case NAVDIR_UP:
-    case NAVDIR_LEFT:
-    case NAVDIR_RIGHT:
-      // These directions are not implemented, matching Mozilla and IE.
-      return E_NOTIMPL;
-    case NAVDIR_FIRSTCHILD:
-      if (target->children_.size() > 0)
-        result = target->children_[0];
-      break;
-    case NAVDIR_LASTCHILD:
-      if (target->children_.size() > 0)
-        result = target->children_[target->children_.size() - 1];
-      break;
-    case NAVDIR_NEXT:
-      result = target->GetNextSibling();
-      break;
-    case NAVDIR_PREVIOUS:
-      result = target->GetPreviousSibling();
-      break;
-  }
-
-  if (!result) {
-    end->vt = VT_EMPTY;
-    return S_FALSE;
-  }
-
-  end->vt = VT_DISPATCH;
-  end->pdispVal = result->NewReference();
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_accChild(VARIANT var_child,
-                                                IDispatch** disp_child) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!disp_child)
-    return E_INVALIDARG;
-
-  *disp_child = NULL;
-
-  BrowserAccessibility* target = GetTargetFromChildID(var_child);
-  if (!target)
-    return E_INVALIDARG;
-
-  (*disp_child) = target->NewReference();
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_accChildCount(LONG* child_count) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!child_count)
-    return E_INVALIDARG;
-
-  *child_count = children_.size();
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_accDefaultAction(VARIANT var_id,
-                                                        BSTR* def_action) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!def_action)
-    return E_INVALIDARG;
-
-  BrowserAccessibility* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  return target->GetAttributeAsBstr(
-      WebAccessibility::ATTR_SHORTCUT, def_action);
-}
-
-STDMETHODIMP BrowserAccessibility::get_accDescription(VARIANT var_id,
-                                                      BSTR* desc) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!desc)
-    return E_INVALIDARG;
-
-  BrowserAccessibility* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  return target->GetAttributeAsBstr(WebAccessibility::ATTR_DESCRIPTION, desc);
-}
-
-STDMETHODIMP BrowserAccessibility::get_accFocus(VARIANT* focus_child) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!focus_child)
-    return E_INVALIDARG;
-
-  BrowserAccessibility* focus = manager_->GetFocus(this);
-  if (focus == this) {
-    focus_child->vt = VT_I4;
-    focus_child->lVal = CHILDID_SELF;
-  } else if (focus == NULL) {
-    focus_child->vt = VT_EMPTY;
-  } else {
-    focus_child->vt = VT_DISPATCH;
-    focus_child->pdispVal = focus->NewReference();
-  }
-
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_accHelp(VARIANT var_id, BSTR* help) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!help)
-    return E_INVALIDARG;
-
-  BrowserAccessibility* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  return target->GetAttributeAsBstr(WebAccessibility::ATTR_HELP, help);
-}
-
-STDMETHODIMP BrowserAccessibility::get_accKeyboardShortcut(VARIANT var_id,
-                                                           BSTR* acc_key) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!acc_key)
-    return E_INVALIDARG;
-
-  BrowserAccessibility* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  return target->GetAttributeAsBstr(WebAccessibility::ATTR_SHORTCUT, acc_key);
-}
-
-STDMETHODIMP BrowserAccessibility::get_accName(VARIANT var_id, BSTR* name) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!name)
-    return E_INVALIDARG;
-
-  BrowserAccessibility* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  if (target->name_.empty())
-    return S_FALSE;
-
-  *name = SysAllocString(target->name_.c_str());
-
-  DCHECK(*name);
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_accParent(IDispatch** disp_parent) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!disp_parent)
-    return E_INVALIDARG;
-
-  IAccessible* parent = parent_;
-  if (parent == NULL) {
-    // This happens if we're the root of the tree;
-    // return the IAccessible for the window.
-    parent = manager_->GetParentWindowIAccessible();
-  }
-
-  parent->AddRef();
-  *disp_parent = parent;
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_accRole(VARIANT var_id, VARIANT* role) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!role)
-    return E_INVALIDARG;
-
-  BrowserAccessibility* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  if (!target->role_name_.empty()) {
-    role->vt = VT_BSTR;
-    role->bstrVal = SysAllocString(target->role_name_.c_str());
-  } else {
-    role->vt = VT_I4;
-    role->lVal = target->role_;
-  }
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_accState(VARIANT var_id,
-                                                VARIANT* state) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!state)
-    return E_INVALIDARG;
-
-  BrowserAccessibility* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  state->vt = VT_I4;
-  state->lVal = target->state_;
-  if (manager_->GetFocus(NULL) == this)
-    state->lVal |= STATE_SYSTEM_FOCUSED;
-
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_accValue(VARIANT var_id, BSTR* value) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!value)
-    return E_INVALIDARG;
-
-  BrowserAccessibility* target = GetTargetFromChildID(var_id);
-  if (!target)
-    return E_INVALIDARG;
-
-  *value = SysAllocString(target->value_.c_str());
-
-  DCHECK(*value);
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_accHelpTopic(BSTR* help_file,
-                                                    VARIANT var_id,
-                                                    LONG* topic_id) {
-  return E_NOTIMPL;
-}
-
-STDMETHODIMP BrowserAccessibility::get_accSelection(VARIANT* selected) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  return E_NOTIMPL;
-}
-
-STDMETHODIMP BrowserAccessibility::accSelect(LONG flags_sel, VARIANT var_id) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (flags_sel & SELFLAG_TAKEFOCUS) {
-    manager_->SetFocus(*this);
-    return S_OK;
-  }
-
-  return S_FALSE;
-}
-
-//
-// IAccessible2 methods.
-//
-
-STDMETHODIMP BrowserAccessibility::role(LONG* role) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!role)
-    return E_INVALIDARG;
-
-  *role = ia2_role_;
-
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_attributes(BSTR* attributes) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!attributes)
-    return E_INVALIDARG;
-
-  // Follow Firefox's convention, which is to return a set of key-value pairs
-  // separated by semicolons, with a colon between the key and the value.
-  string16 str;
-  for (unsigned int i = 0; i < html_attributes_.size(); i++) {
-    if (i != 0)
-      str += L';';
-    str += Escape(html_attributes_[i].first);
-    str += L':';
-    str += Escape(html_attributes_[i].second);
-  }
-
-  if (str.empty())
-    return S_FALSE;
-
-  *attributes = SysAllocString(str.c_str());
-  DCHECK(*attributes);
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_states(AccessibleStates* states) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!states)
-    return E_INVALIDARG;
-
-  *states = ia2_state_;
-
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_uniqueID(LONG* unique_id) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!unique_id)
-    return E_INVALIDARG;
-
-  *unique_id = child_id_;
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_windowHandle(HWND* window_handle) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!window_handle)
-    return E_INVALIDARG;
-
-  *window_handle = manager_->GetParentHWND();
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_indexInParent(LONG* index_in_parent) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!index_in_parent)
-    return E_INVALIDARG;
-
-  *index_in_parent = index_in_parent_;
-  return S_OK;
-}
-
-//
-// IAccessibleImage methods.
-//
-
-STDMETHODIMP BrowserAccessibility::get_description(BSTR* desc) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!desc)
-    return E_INVALIDARG;
-
-  return GetAttributeAsBstr(WebAccessibility::ATTR_DESCRIPTION, desc);
-}
-
-STDMETHODIMP BrowserAccessibility::get_imagePosition(
-    enum IA2CoordinateType coordinate_type, long* x, long* y) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!x || !y)
-    return E_INVALIDARG;
-
-  if (coordinate_type == IA2_COORDTYPE_SCREEN_RELATIVE) {
-    HWND parent_hwnd = manager_->GetParentHWND();
-    POINT top_left = {0, 0};
-    ::ClientToScreen(parent_hwnd, &top_left);
-    *x = location_.x + top_left.x;
-    *y = location_.y + top_left.y;
-  } else if (coordinate_type == IA2_COORDTYPE_PARENT_RELATIVE) {
-    *x = location_.x;
-    *y = location_.y;
-    if (parent_) {
-      *x -= parent_->location_.x;
-      *y -= parent_->location_.y;
-    }
-  } else {
-    return E_INVALIDARG;
-  }
-
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_imageSize(long* height, long* width) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!height || !width)
-    return E_INVALIDARG;
-
-  *height = location_.height;
-  *width = location_.width;
-  return S_OK;
-}
-
-//
-// IAccessibleText methods.
-//
-
-STDMETHODIMP BrowserAccessibility::get_nCharacters(long* n_characters) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!n_characters)
-    return E_INVALIDARG;
-
-  *n_characters = name_.length();
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_text(
-    long start_offset, long end_offset, BSTR* text) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!text)
-    return E_INVALIDARG;
-
-  long len = name_.length();
-  if (start_offset < 0)
-    start_offset = 0;
-  if (end_offset > len)
-    end_offset = len;
-
-  string16 substr = name_.substr(start_offset, end_offset - start_offset);
-  if (substr.empty())
-    return S_FALSE;
-
-  *text = SysAllocString(substr.c_str());
-  DCHECK(*text);
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_caretOffset(long* offset) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!offset)
-    return E_INVALIDARG;
-
-  *offset = 0;
-  return S_OK;
-}
-
-//
-// ISimpleDOMDocument methods.
-//
-
-STDMETHODIMP BrowserAccessibility::get_URL(BSTR* url) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!url)
-    return E_INVALIDARG;
-
-  return GetAttributeAsBstr(WebAccessibility::ATTR_DOC_URL, url);
-}
-
-STDMETHODIMP BrowserAccessibility::get_title(BSTR* title) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!title)
-    return E_INVALIDARG;
-
-  return GetAttributeAsBstr(WebAccessibility::ATTR_DOC_TITLE, title);
-}
-
-STDMETHODIMP BrowserAccessibility::get_mimeType(BSTR* mime_type) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!mime_type)
-    return E_INVALIDARG;
-
-  return GetAttributeAsBstr(WebAccessibility::ATTR_DOC_MIMETYPE, mime_type);
-}
-
-STDMETHODIMP BrowserAccessibility::get_docType(BSTR* doc_type) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!doc_type)
-    return E_INVALIDARG;
-
-  return GetAttributeAsBstr(WebAccessibility::ATTR_DOC_DOCTYPE, doc_type);
-}
-
-//
-// ISimpleDOMNode methods.
-//
-
-STDMETHODIMP BrowserAccessibility::get_nodeInfo(
-    BSTR* node_name,
-    short* name_space_id,
-    BSTR* node_value,
-    unsigned int* num_children,
-    unsigned int* unique_id,
-    unsigned short* node_type) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!node_name || !name_space_id || !node_value || !num_children ||
-      !unique_id || !node_type) {
-    return E_INVALIDARG;
-  }
-
-  string16 tag;
-  if (GetAttribute(WebAccessibility::ATTR_HTML_TAG, &tag))
-    *node_name = SysAllocString(tag.c_str());
-  else
-    *node_name = NULL;
-
-  *name_space_id = 0;
-  *node_value = SysAllocString(value_.c_str());
-  *num_children = children_.size();
-  *unique_id = child_id_;
-
-  if (role_ == ROLE_SYSTEM_DOCUMENT) {
-    *node_type = NODETYPE_DOCUMENT;
-  } else if (role_ == ROLE_SYSTEM_TEXT &&
-             ((ia2_state_ & IA2_STATE_EDITABLE) == 0)) {
-    *node_type = NODETYPE_TEXT;
-  } else {
-    *node_type = NODETYPE_ELEMENT;
-  }
-
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_attributes(
-    unsigned short max_attribs,
-    BSTR* attrib_names,
-    short* name_space_id,
-    BSTR* attrib_values,
-    unsigned short* num_attribs) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!attrib_names || !name_space_id || !attrib_values || !num_attribs)
-    return E_INVALIDARG;
-
-  *num_attribs = max_attribs;
-  if (*num_attribs > html_attributes_.size())
-    *num_attribs = html_attributes_.size();
-
-  for (unsigned short i = 0; i < *num_attribs; ++i) {
-    attrib_names[i] = SysAllocString(html_attributes_[i].first.c_str());
-    name_space_id[i] = 0;
-    attrib_values[i] = SysAllocString(html_attributes_[i].second.c_str());
-  }
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_attributesForNames(
-    unsigned short num_attribs,
-    BSTR* attrib_names,
-    short* name_space_id,
-    BSTR* attrib_values) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!attrib_names || !name_space_id || !attrib_values)
-    return E_INVALIDARG;
-
-  for (unsigned short i = 0; i < num_attribs; ++i) {
-    name_space_id[i] = 0;
-    bool found = false;
-    string16 name = (LPCWSTR)attrib_names[i];
-    for (unsigned int j = 0;  j < html_attributes_.size(); ++j) {
-      if (html_attributes_[j].first == name) {
-        attrib_values[i] = SysAllocString(html_attributes_[j].second.c_str());
-        found = true;
-        break;
-      }
-    }
-    if (!found) {
-      attrib_values[i] = NULL;
-    }
-  }
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_computedStyle(
-    unsigned short max_style_properties,
-    boolean use_alternate_view,
-    BSTR *style_properties,
-    BSTR *style_values,
-    unsigned short *num_style_properties)  {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!style_properties || !style_values)
-    return E_INVALIDARG;
-
-  // We only cache a single style property for now: DISPLAY
-
-  if (max_style_properties == 0 ||
-      !HasAttribute(WebAccessibility::ATTR_DISPLAY)) {
-    *num_style_properties = 0;
-    return S_OK;
-  }
-
-  string16 display;
-  GetAttribute(WebAccessibility::ATTR_DISPLAY, &display);
-  *num_style_properties = 1;
-  style_properties[0] = SysAllocString(L"display");
-  style_values[0] = SysAllocString(display.c_str());
-
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_computedStyleForProperties(
-    unsigned short num_style_properties,
-    boolean use_alternate_view,
-    BSTR* style_properties,
-    BSTR* style_values) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!style_properties || !style_values)
-    return E_INVALIDARG;
-
-  // We only cache a single style property for now: DISPLAY
-
-  for (unsigned short i = 0; i < num_style_properties; i++) {
-    string16 name = (LPCWSTR)style_properties[i];
-    StringToLowerASCII(&name);
-    if (name == L"display") {
-      string16 display;
-      GetAttribute(WebAccessibility::ATTR_DISPLAY, &display);
-      style_values[i] = SysAllocString(display.c_str());
-    } else {
-      style_values[i] = NULL;
-    }
-  }
-
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::scrollTo(boolean placeTopLeft) {
-  return E_NOTIMPL;
-}
-
-STDMETHODIMP BrowserAccessibility::get_parentNode(ISimpleDOMNode** node) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!node)
-    return E_INVALIDARG;
-
-  *node = parent_->NewReference();
-  return S_OK;
-}
-
-STDMETHODIMP BrowserAccessibility::get_firstChild(ISimpleDOMNode** node)  {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!node)
-    return E_INVALIDARG;
-
-  if (children_.size()) {
-    *node = children_[0]->NewReference();
-    return S_OK;
-  } else {
-    *node = NULL;
-    return S_FALSE;
-  }
-}
-
-STDMETHODIMP BrowserAccessibility::get_lastChild(ISimpleDOMNode** node) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!node)
-    return E_INVALIDARG;
-
-  if (children_.size()) {
-    *node = children_[children_.size() - 1]->NewReference();
-    return S_OK;
-  } else {
-    *node = NULL;
-    return S_FALSE;
-  }
-}
-
-STDMETHODIMP BrowserAccessibility::get_previousSibling(
-    ISimpleDOMNode** node) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!node)
-    return E_INVALIDARG;
-
-  if (parent_ && index_in_parent_ > 0) {
-    *node = parent_->children_[index_in_parent_ - 1]->NewReference();
-    return S_OK;
-  } else {
-    *node = NULL;
-    return S_FALSE;
-  }
-}
-
-STDMETHODIMP BrowserAccessibility::get_nextSibling(ISimpleDOMNode** node) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!node)
-    return E_INVALIDARG;
-
-  if (parent_ &&
-      index_in_parent_ >= 0 &&
-      index_in_parent_ < static_cast<int>(parent_->children_.size()) - 1) {
-    *node = parent_->children_[index_in_parent_ + 1]->NewReference();
-    return S_OK;
-  } else {
-    *node = NULL;
-    return S_FALSE;
-  }
-}
-
-STDMETHODIMP BrowserAccessibility::get_childAt(
-    unsigned int child_index,
-    ISimpleDOMNode** node) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!node)
-    return E_INVALIDARG;
-
-  if (child_index < children_.size()) {
-    *node = children_[child_index]->NewReference();
-    return S_OK;
-  } else {
-    *node = NULL;
-    return S_FALSE;
-  }
-}
-
-//
-// ISimpleDOMText methods.
-//
-
-STDMETHODIMP BrowserAccessibility::get_domText(BSTR* dom_text) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (!dom_text)
-    return E_INVALIDARG;
-
-  if (name_.empty())
-    return S_FALSE;
-
-  *dom_text = SysAllocString(name_.c_str());
-  DCHECK(*dom_text);
-  return S_OK;
-}
-
-//
-// IServiceProvider methods.
-//
-
-STDMETHODIMP BrowserAccessibility::QueryService(
-    REFGUID guidService, REFIID riid, void** object) {
-  if (!instance_active_)
-    return E_FAIL;
-
-  if (guidService == IID_IAccessible ||
-      guidService == IID_IAccessible2 ||
-      guidService == IID_IAccessibleImage ||
-      guidService == IID_IAccessibleText ||
-      guidService == IID_ISimpleDOMDocument ||
-      guidService == IID_ISimpleDOMNode ||
-      guidService == IID_ISimpleDOMText) {
-    return QueryInterface(riid, object);
-  }
-
-  *object = NULL;
-  return E_FAIL;
-}
-
-//
-// CComObjectRootEx methods.
-//
-
-HRESULT WINAPI BrowserAccessibility::InternalQueryInterface(
-    void* this_ptr,
-    const _ATL_INTMAP_ENTRY* entries,
-    REFIID iid,
-    void** object) {
-  if (iid == IID_IAccessibleText) {
-    if (role_ != ROLE_SYSTEM_LINK) {
-      *object = NULL;
-      return E_NOINTERFACE;
-    }
-  } else if (iid == IID_IAccessibleImage) {
-    if (role_ != ROLE_SYSTEM_GRAPHIC) {
-      *object = NULL;
-      return E_NOINTERFACE;
-    }
-  } else if (iid == IID_ISimpleDOMDocument) {
-    if (role_ != ROLE_SYSTEM_DOCUMENT) {
-      *object = NULL;
-      return E_NOINTERFACE;
-    }
-  }
-
-  return CComObjectRootBase::InternalQueryInterface(
-      this_ptr, entries, iid, object);
-}
-
-//
-// Private methods.
-//
-
-BrowserAccessibility* BrowserAccessibility::GetTargetFromChildID(
-    const VARIANT& var_id) {
-  if (var_id.vt != VT_I4)
-    return NULL;
-
-  LONG child_id = var_id.lVal;
-  if (child_id == CHILDID_SELF)
-    return this;
-
-  if (child_id >= 1 && child_id <= static_cast<LONG>(children_.size()))
-    return children_[child_id - 1];
-
-  return manager_->GetFromChildID(child_id);
-}
-
-bool BrowserAccessibility::HasAttribute(WebAccessibility::Attribute attribute) {
-  return (attributes_.find(attribute) != attributes_.end());
-}
-
-bool BrowserAccessibility::GetAttribute(
-    WebAccessibility::Attribute attribute, string16* value) {
-  std::map<int32, string16>::iterator iter = attributes_.find(attribute);
-  if (iter != attributes_.end()) {
-    *value = iter->second;
-    return true;
-  }
-
-  return false;
-}
-
-HRESULT BrowserAccessibility::GetAttributeAsBstr(
-    WebAccessibility::Attribute attribute, BSTR* value_bstr) {
-  string16 str;
-
-  if (!GetAttribute(attribute, &str))
-    return S_FALSE;
-
-  if (str.empty())
-    return S_FALSE;
-
-  *value_bstr = SysAllocString(str.c_str());
-  DCHECK(*value_bstr);
-
-  return S_OK;
-}
-
-string16 BrowserAccessibility::Escape(string16 str) {
-  return UTF8ToUTF16(EscapeNonASCII(UTF16ToUTF8(str)));
-}
-
-void BrowserAccessibility::InitRoleAndState(LONG web_role,
-                                            LONG web_state) {
-  state_ = 0;
-  ia2_state_ = IA2_STATE_OPAQUE;
-
-  if ((web_state >> WebAccessibility::STATE_CHECKED) & 1)
-    state_ |= STATE_SYSTEM_CHECKED;
-  if ((web_state >> WebAccessibility::STATE_COLLAPSED) & 1)
-    state_ |= STATE_SYSTEM_COLLAPSED;
-  if ((web_state >> WebAccessibility::STATE_EXPANDED) & 1)
-    state_ |= STATE_SYSTEM_EXPANDED;
-  if ((web_state >> WebAccessibility::STATE_FOCUSABLE) & 1)
-    state_ |= STATE_SYSTEM_FOCUSABLE;
-  if ((web_state >> WebAccessibility::STATE_HASPOPUP) & 1)
-    state_ |= STATE_SYSTEM_HASPOPUP;
-  if ((web_state >> WebAccessibility::STATE_HOTTRACKED) & 1)
-    state_ |= STATE_SYSTEM_HOTTRACKED;
-  if ((web_state >> WebAccessibility::STATE_INDETERMINATE) & 1)
-    state_ |= STATE_SYSTEM_INDETERMINATE;
-  if ((web_state >> WebAccessibility::STATE_INVISIBLE) & 1)
-    state_ |= STATE_SYSTEM_INVISIBLE;
-  if ((web_state >> WebAccessibility::STATE_LINKED) & 1)
-    state_ |= STATE_SYSTEM_LINKED;
-  if ((web_state >> WebAccessibility::STATE_MULTISELECTABLE) & 1)
-    state_ |= STATE_SYSTEM_MULTISELECTABLE;
-  // TODO(ctguil): Support STATE_SYSTEM_EXTSELECTABLE/accSelect.
-  if ((web_state >> WebAccessibility::STATE_OFFSCREEN) & 1)
-    state_ |= STATE_SYSTEM_OFFSCREEN;
-  if ((web_state >> WebAccessibility::STATE_PRESSED) & 1)
-    state_ |= STATE_SYSTEM_PRESSED;
-  if ((web_state >> WebAccessibility::STATE_PROTECTED) & 1)
-    state_ |= STATE_SYSTEM_PROTECTED;
-  if ((web_state >> WebAccessibility::STATE_SELECTABLE) & 1)
-    state_ |= STATE_SYSTEM_SELECTABLE;
-  if ((web_state >> WebAccessibility::STATE_SELECTED) & 1)
-    state_ |= STATE_SYSTEM_SELECTED;
-  if ((web_state >> WebAccessibility::STATE_READONLY) & 1)
-    state_ |= STATE_SYSTEM_READONLY;
-  if ((web_state >> WebAccessibility::STATE_TRAVERSED) & 1)
-    state_ |= STATE_SYSTEM_TRAVERSED;
-  if ((web_state >> WebAccessibility::STATE_BUSY) & 1)
-    state_ |= STATE_SYSTEM_BUSY;
-  if ((web_state >> WebAccessibility::STATE_UNAVAILABLE) & 1)
-    state_ |= STATE_SYSTEM_UNAVAILABLE;
-
-  role_ = 0;
-  ia2_role_ = 0;
-  switch (web_role) {
-    case WebAccessibility::ROLE_ALERT:
-    case WebAccessibility::ROLE_ALERT_DIALOG:
-      role_ = ROLE_SYSTEM_ALERT;
-      break;
-    case WebAccessibility::ROLE_APPLICATION:
-      role_ = ROLE_SYSTEM_APPLICATION;
-      break;
-    case WebAccessibility::ROLE_ARTICLE:
-      role_ = ROLE_SYSTEM_GROUPING;
-      ia2_role_ = IA2_ROLE_SECTION;
-      break;
-    case WebAccessibility::ROLE_BUTTON:
-      role_ = ROLE_SYSTEM_PUSHBUTTON;
-      break;
-    case WebAccessibility::ROLE_CELL:
-      role_ = ROLE_SYSTEM_CELL;
-      break;
-    case WebAccessibility::ROLE_CHECKBOX:
-      role_ = ROLE_SYSTEM_CHECKBUTTON;
-      break;
-    case WebAccessibility::ROLE_COLOR_WELL:
-      role_ = ROLE_SYSTEM_CLIENT;
-      ia2_role_ = IA2_ROLE_COLOR_CHOOSER;
-      break;
-    case WebAccessibility::ROLE_COLUMN:
-      role_ = ROLE_SYSTEM_COLUMN;
-      break;
-    case WebAccessibility::ROLE_COLUMN_HEADER:
-      role_ = ROLE_SYSTEM_COLUMNHEADER;
-      break;
-    case WebAccessibility::ROLE_COMBO_BOX:
-      role_ = ROLE_SYSTEM_COMBOBOX;
-      break;
-    case WebAccessibility::ROLE_DEFINITION_LIST_DEFINITION:
-      GetAttribute(WebAccessibility::ATTR_HTML_TAG, &role_name_);
-      ia2_role_ = IA2_ROLE_PARAGRAPH;
-      break;
-    case WebAccessibility::ROLE_DEFINITION_LIST_TERM:
-      role_ = ROLE_SYSTEM_LISTITEM;
-      break;
-    case WebAccessibility::ROLE_DIALOG:
-      role_ = ROLE_SYSTEM_DIALOG;
-      break;
-    case WebAccessibility::ROLE_DOCUMENT:
-    case WebAccessibility::ROLE_WEB_AREA:
-      role_ = ROLE_SYSTEM_DOCUMENT;
-      state_ |= STATE_SYSTEM_READONLY;
-      state_ |= STATE_SYSTEM_FOCUSABLE;
-      break;
-    case WebAccessibility::ROLE_EDITABLE_TEXT:
-      role_ = ROLE_SYSTEM_TEXT;
-      ia2_state_ |= IA2_STATE_SINGLE_LINE;
-      ia2_state_ |= IA2_STATE_EDITABLE;
-      break;
-    case WebAccessibility::ROLE_GRID:
-      role_ = ROLE_SYSTEM_TABLE;
-      break;
-    case WebAccessibility::ROLE_GROUP:
-      GetAttribute(WebAccessibility::ATTR_HTML_TAG, &role_name_);
-      if (role_name_.empty())
-        role_name_ = L"div";
-      ia2_role_ = IA2_ROLE_SECTION;
-      break;
-    case WebAccessibility::ROLE_HEADING:
-      GetAttribute(WebAccessibility::ATTR_HTML_TAG, &role_name_);
-      ia2_role_ = IA2_ROLE_HEADING;
-      break;
-    case WebAccessibility::ROLE_IMAGE:
-      role_ = ROLE_SYSTEM_GRAPHIC;
-      break;
-    case WebAccessibility::ROLE_IMAGE_MAP:
-      GetAttribute(WebAccessibility::ATTR_HTML_TAG, &role_name_);
-      ia2_role_ = IA2_ROLE_IMAGE_MAP;
-      break;
-    case WebAccessibility::ROLE_IMAGE_MAP_LINK:
-      role_ = ROLE_SYSTEM_LINK;
-      state_ |= STATE_SYSTEM_LINKED;
-      break;
-    case WebAccessibility::ROLE_LANDMARK_APPLICATION:
-    case WebAccessibility::ROLE_LANDMARK_BANNER:
-    case WebAccessibility::ROLE_LANDMARK_COMPLEMENTARY:
-    case WebAccessibility::ROLE_LANDMARK_CONTENTINFO:
-    case WebAccessibility::ROLE_LANDMARK_MAIN:
-    case WebAccessibility::ROLE_LANDMARK_NAVIGATION:
-    case WebAccessibility::ROLE_LANDMARK_SEARCH:
-      role_ = ROLE_SYSTEM_GROUPING;
-      ia2_role_ = IA2_ROLE_SECTION;
-      break;
-    case WebAccessibility::ROLE_LINK:
-    case WebAccessibility::ROLE_WEBCORE_LINK:
-      role_ = ROLE_SYSTEM_LINK;
-      state_ |= STATE_SYSTEM_LINKED;
-      break;
-    case WebAccessibility::ROLE_LIST:
-      role_ = ROLE_SYSTEM_LIST;
-      break;
-    case WebAccessibility::ROLE_LISTBOX:
-      role_ = ROLE_SYSTEM_LIST;
-      break;
-    case WebAccessibility::ROLE_LISTBOX_OPTION:
-    case WebAccessibility::ROLE_LIST_ITEM:
-    case WebAccessibility::ROLE_LIST_MARKER:
-      role_ = ROLE_SYSTEM_LISTITEM;
-      break;
-    case WebAccessibility::ROLE_MENU:
-    case WebAccessibility::ROLE_MENU_BUTTON:
-      role_ = ROLE_SYSTEM_MENUPOPUP;
-      break;
-    case WebAccessibility::ROLE_MENU_BAR:
-      role_ = ROLE_SYSTEM_MENUBAR;
-      break;
-    case WebAccessibility::ROLE_MENU_ITEM:
-    case WebAccessibility::ROLE_MENU_LIST_OPTION:
-      role_ = ROLE_SYSTEM_MENUITEM;
-      break;
-    case WebAccessibility::ROLE_MENU_LIST_POPUP:
-      role_ = ROLE_SYSTEM_MENUPOPUP;
-      break;
-    case WebAccessibility::ROLE_NOTE:
-      role_ = ROLE_SYSTEM_GROUPING;
-      ia2_role_ = IA2_ROLE_NOTE;
-      break;
-    case WebAccessibility::ROLE_OUTLINE:
-      role_ = ROLE_SYSTEM_OUTLINE;
-      break;
-    case WebAccessibility::ROLE_POPUP_BUTTON:
-      role_ = ROLE_SYSTEM_COMBOBOX;
-      break;
-    case WebAccessibility::ROLE_PROGRESS_INDICATOR:
-      role_ = ROLE_SYSTEM_PROGRESSBAR;
-      break;
-    case WebAccessibility::ROLE_RADIO_BUTTON:
-      role_ = ROLE_SYSTEM_RADIOBUTTON;
-      break;
-    case WebAccessibility::ROLE_RADIO_GROUP:
-      role_ = ROLE_SYSTEM_GROUPING;
-      ia2_role_ = IA2_ROLE_SECTION;
-      break;
-    case WebAccessibility::ROLE_REGION:
-      role_ = ROLE_SYSTEM_GROUPING;
-      ia2_role_ = IA2_ROLE_SECTION;
-      break;
-    case WebAccessibility::ROLE_ROW:
-      role_ = ROLE_SYSTEM_ROW;
-      break;
-    case WebAccessibility::ROLE_ROW_HEADER:
-      role_ = ROLE_SYSTEM_ROWHEADER;
-      break;
-    case WebAccessibility::ROLE_RULER:
-      role_ = ROLE_SYSTEM_CLIENT;
-      ia2_role_ = IA2_ROLE_RULER;
-      break;
-    case WebAccessibility::ROLE_SCROLLAREA:
-      role_ = ROLE_SYSTEM_CLIENT;
-      ia2_role_ = IA2_ROLE_SCROLL_PANE;
-      break;
-    case WebAccessibility::ROLE_SCROLLBAR:
-      role_ = ROLE_SYSTEM_SCROLLBAR;
-      break;
-    case WebAccessibility::ROLE_SLIDER:
-      role_ = ROLE_SYSTEM_SLIDER;
-      break;
-    case WebAccessibility::ROLE_SPLIT_GROUP:
-      role_ = ROLE_SYSTEM_CLIENT;
-      ia2_role_ = IA2_ROLE_SPLIT_PANE;
-      break;
-    case WebAccessibility::ROLE_ANNOTATION:
-    case WebAccessibility::ROLE_STATIC_TEXT:
-      role_ = ROLE_SYSTEM_TEXT;
-      break;
-    case WebAccessibility::ROLE_STATUS:
-      role_ = ROLE_SYSTEM_STATUSBAR;
-      break;
-    case WebAccessibility::ROLE_TAB:
-      role_ = ROLE_SYSTEM_PAGETAB;
-      break;
-    case WebAccessibility::ROLE_TABLE:
-      role_ = ROLE_SYSTEM_TABLE;
-      break;
-    case WebAccessibility::ROLE_TABLE_HEADER_CONTAINER:
-      role_ = ROLE_SYSTEM_GROUPING;
-      ia2_role_ = IA2_ROLE_SECTION;
-      break;
-    case WebAccessibility::ROLE_TAB_GROUP:
-    case WebAccessibility::ROLE_TAB_LIST:
-    case WebAccessibility::ROLE_TAB_PANEL:
-      role_ = ROLE_SYSTEM_PAGETABLIST;
-      break;
-    case WebAccessibility::ROLE_TEXTAREA:
-      role_ = ROLE_SYSTEM_TEXT;
-      ia2_state_ |= IA2_STATE_MULTI_LINE;
-      ia2_state_ |= IA2_STATE_EDITABLE;
-      break;
-    case WebAccessibility::ROLE_TEXT_FIELD:
-      role_ = ROLE_SYSTEM_TEXT;
-      ia2_state_ |= IA2_STATE_SINGLE_LINE;
-      ia2_state_ |= IA2_STATE_EDITABLE;
-      break;
-    case WebAccessibility::ROLE_TOOLBAR:
-      role_ = ROLE_SYSTEM_TOOLBAR;
-      break;
-    case WebAccessibility::ROLE_TOOLTIP:
-      role_ = ROLE_SYSTEM_TOOLTIP;
-      break;
-    case WebAccessibility::ROLE_TREE:
-      role_ = ROLE_SYSTEM_OUTLINE;
-      break;
-    case WebAccessibility::ROLE_TREE_GRID:
-      role_ = ROLE_SYSTEM_OUTLINE;
-      break;
-    case WebAccessibility::ROLE_TREE_ITEM:
-      role_ = ROLE_SYSTEM_OUTLINEITEM;
-      break;
-    case WebAccessibility::ROLE_WINDOW:
-      role_ = ROLE_SYSTEM_WINDOW;
-      break;
-
-    // TODO(dmazzoni): figure out the proper MSAA role for all of these.
-    case WebAccessibility::ROLE_BROWSER:
-    case WebAccessibility::ROLE_BUSY_INDICATOR:
-    case WebAccessibility::ROLE_DIRECTORY:
-    case WebAccessibility::ROLE_DISCLOSURE_TRIANGLE:
-    case WebAccessibility::ROLE_DRAWER:
-    case WebAccessibility::ROLE_GROW_AREA:
-    case WebAccessibility::ROLE_HELP_TAG:
-    case WebAccessibility::ROLE_IGNORED:
-    case WebAccessibility::ROLE_INCREMENTOR:
-    case WebAccessibility::ROLE_LOG:
-    case WebAccessibility::ROLE_MARQUEE:
-    case WebAccessibility::ROLE_MATH:
-    case WebAccessibility::ROLE_MATTE:
-    case WebAccessibility::ROLE_RULER_MARKER:
-    case WebAccessibility::ROLE_SHEET:
-    case WebAccessibility::ROLE_SLIDER_THUMB:
-    case WebAccessibility::ROLE_SPLITTER:
-    case WebAccessibility::ROLE_SYSTEM_WIDE:
-    case WebAccessibility::ROLE_TIMER:
-    case WebAccessibility::ROLE_VALUE_INDICATOR:
-    default:
-      role_ = ROLE_SYSTEM_CLIENT;
-      break;
-  }
-
-  // The role should always be set.
-  DCHECK(!role_name_.empty() || role_);
-
-  // If we didn't explicitly set the IAccessible2 role, make it the same
-  // as the MSAA role.
-  if (!ia2_role_)
-    ia2_role_ = role_;
-}