Make BrowserAccessibilityManager cross platform. Step 1....

chrome/browser/browser_accessibility_manager_win.cc

Index: chrome/browser/browser_accessibility_manager_win.cc
===================================================================
--- chrome/browser/browser_accessibility_manager_win.cc	(revision 61015)
+++ chrome/browser/browser_accessibility_manager_win.cc	(working copy)
@@ -1,277 +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_manager_win.h"
-
-#include "chrome/browser/browser_accessibility_win.h"
-#include "chrome/browser/renderer_host/render_process_host.h"
-#include "chrome/browser/renderer_host/render_view_host.h"
-#include "chrome/common/render_messages.h"
-#include "chrome/common/render_messages_params.h"
-
-using webkit_glue::WebAccessibility;
-
-// Factory method to create an instance of BrowserAccessibility
-BrowserAccessibility* BrowserAccessibilityFactory::Create() {
-  CComObject<BrowserAccessibility>* instance;
-  HRESULT hr = CComObject<BrowserAccessibility>::CreateInstance(&instance);
-  DCHECK(SUCCEEDED(hr));
-  return instance->NewReference();
-}
-
-// static
-// Start child IDs at -1 and decrement each time, because clients use
-// child IDs of 1, 2, 3, ... to access the children of an object by
-// index, so we use negative IDs to clearly distinguish between indices
-// and unique IDs.
-LONG BrowserAccessibilityManager::next_child_id_ = -1;
-
-BrowserAccessibilityManager::BrowserAccessibilityManager(
-    HWND parent_hwnd,
-    const webkit_glue::WebAccessibility& src,
-    BrowserAccessibilityDelegate* delegate,
-    BrowserAccessibilityFactory* factory)
-    : parent_hwnd_(parent_hwnd),
-      delegate_(delegate),
-      factory_(factory),
-      focus_(NULL) {
-  HRESULT hr = ::CreateStdAccessibleObject(
-      parent_hwnd_, OBJID_WINDOW, IID_IAccessible,
-      reinterpret_cast<void **>(&window_iaccessible_));
-  DCHECK(SUCCEEDED(hr));
-  root_ = CreateAccessibilityTree(NULL, GetNextChildID(), src, 0);
-  if (!focus_)
-    focus_ = root_;
-}
-
-BrowserAccessibilityManager::~BrowserAccessibilityManager() {
-  // Clients could still hold references to some nodes of the tree, so
-  // calling Inactivate will make sure that as many nodes as possible are
-  // released now, and remaining nodes are marked as inactive so that
-  // calls to any methods on them will return E_FAIL;
-  root_->InactivateTree();
-  root_->Release();
-}
-
-BrowserAccessibility* BrowserAccessibilityManager::GetRoot() {
-  return root_;
-}
-
-void BrowserAccessibilityManager::Remove(LONG child_id) {
-  child_id_map_.erase(child_id);
-}
-
-BrowserAccessibility* BrowserAccessibilityManager::GetFromChildID(
-    LONG child_id) {
-  base::hash_map<LONG, BrowserAccessibility*>::iterator iter =
-      child_id_map_.find(child_id);
-  if (iter != child_id_map_.end()) {
-    return iter->second;
-  } else {
-    return NULL;
-  }
-}
-
-IAccessible* BrowserAccessibilityManager::GetParentWindowIAccessible() {
-  return window_iaccessible_;
-}
-
-HWND BrowserAccessibilityManager::GetParentHWND() {
-  return parent_hwnd_;
-}
-
-BrowserAccessibility* BrowserAccessibilityManager::GetFocus(
-    BrowserAccessibility* root) {
-  if (focus_ && (!root || focus_->IsDescendantOf(root)))
-    return focus_;
-
-  return NULL;
-}
-
-void BrowserAccessibilityManager::SetFocus(const BrowserAccessibility& node) {
-  if (delegate_)
-    delegate_->SetAccessibilityFocus(node.renderer_id());
-}
-
-void BrowserAccessibilityManager::DoDefaultAction(
-    const BrowserAccessibility& node) {
-  if (delegate_)
-    delegate_->AccessibilityDoDefaultAction(node.renderer_id());
-}
-
-void BrowserAccessibilityManager::OnAccessibilityNotifications(
-    const std::vector<ViewHostMsg_AccessibilityNotification_Params>& params) {
-  for (uint32 index = 0; index < params.size(); index++) {
-    const ViewHostMsg_AccessibilityNotification_Params& param = params[index];
-
-    switch (param.notification_type) {
-      case ViewHostMsg_AccessibilityNotification_Params::
-          NOTIFICATION_TYPE_CHECK_STATE_CHANGED:
-        OnAccessibilityObjectStateChange(param.acc_obj);
-        break;
-      case ViewHostMsg_AccessibilityNotification_Params::
-          NOTIFICATION_TYPE_CHILDREN_CHANGED:
-        OnAccessibilityObjectChildrenChange(param.acc_obj);
-        break;
-      case ViewHostMsg_AccessibilityNotification_Params::
-          NOTIFICATION_TYPE_FOCUS_CHANGED:
-        OnAccessibilityObjectFocusChange(param.acc_obj);
-        break;
-      case ViewHostMsg_AccessibilityNotification_Params::
-          NOTIFICATION_TYPE_LOAD_COMPLETE:
-        OnAccessibilityObjectLoadComplete(param.acc_obj);
-        break;
-      case ViewHostMsg_AccessibilityNotification_Params::
-          NOTIFICATION_TYPE_VALUE_CHANGED:
-        OnAccessibilityObjectValueChange(param.acc_obj);
-        break;
-      default:
-        DCHECK(0);
-        break;
-    }
-  }
-}
-
-BrowserAccessibility* BrowserAccessibilityManager::UpdateTree(
-    const webkit_glue::WebAccessibility& acc_obj) {
-  base::hash_map<int, LONG>::iterator iter =
-      renderer_id_to_child_id_map_.find(acc_obj.id);
-  if (iter == renderer_id_to_child_id_map_.end())
-    return NULL;
-
-  LONG child_id = iter->second;
-  BrowserAccessibility* old_browser_acc = GetFromChildID(child_id);
-  if (!old_browser_acc)
-    return NULL;
-
-  if (old_browser_acc->GetChildCount() == 0 && acc_obj.children.size() == 0) {
-    // Reinitialize the BrowserAccessibility if there are no children to update.
-    old_browser_acc->Initialize(
-        this,
-        old_browser_acc->GetParent(),
-        child_id,
-        old_browser_acc->index_in_parent(),
-        acc_obj);
-
-    return old_browser_acc;
-  } else {
-    BrowserAccessibility* new_browser_acc = CreateAccessibilityTree(
-        old_browser_acc->GetParent(),
-        child_id,
-        acc_obj,
-        old_browser_acc->index_in_parent());
-
-    if (old_browser_acc->GetParent()) {
-      old_browser_acc->GetParent()->ReplaceChild(
-          old_browser_acc,
-          new_browser_acc);
-    } else {
-      DCHECK_EQ(old_browser_acc, root_);
-      root_ = new_browser_acc;
-    }
-    old_browser_acc->InactivateTree();
-    old_browser_acc->Release();
-    child_id_map_[child_id] = new_browser_acc;
-
-    return new_browser_acc;
-  }
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectStateChange(
-    const webkit_glue::WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateTree(acc_obj);
-  if (!new_browser_acc)
-    return;
-
-  LONG child_id = new_browser_acc->child_id();
-  NotifyWinEvent(
-      EVENT_OBJECT_STATECHANGE, parent_hwnd_, OBJID_CLIENT, child_id);
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectChildrenChange(
-    const webkit_glue::WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateTree(acc_obj);
-  if (!new_browser_acc)
-    return;
-
-  LONG child_id;
-  if (root_ != new_browser_acc) {
-    child_id = new_browser_acc->GetParent()->child_id();
-  } else {
-    child_id = CHILDID_SELF;
-  }
-
-  NotifyWinEvent(EVENT_OBJECT_REORDER, parent_hwnd_, OBJID_CLIENT, child_id);
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectFocusChange(
-  const webkit_glue::WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateTree(acc_obj);
-  if (!new_browser_acc)
-    return;
-
-  focus_ = new_browser_acc;
-  LONG child_id = new_browser_acc->child_id();
-  NotifyWinEvent(EVENT_OBJECT_FOCUS, parent_hwnd_, OBJID_CLIENT, child_id);
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectLoadComplete(
-  const webkit_glue::WebAccessibility& acc_obj) {
-  root_->InactivateTree();
-  root_->Release();
-  focus_ = NULL;
-
-  root_ = CreateAccessibilityTree(NULL, GetNextChildID(), acc_obj, 0);
-  if (!focus_)
-    focus_ = root_;
-
-  LONG root_id = root_->child_id();
-  NotifyWinEvent(EVENT_OBJECT_FOCUS, parent_hwnd_, OBJID_CLIENT, root_id);
-  NotifyWinEvent(
-    IA2_EVENT_DOCUMENT_LOAD_COMPLETE, parent_hwnd_, OBJID_CLIENT, root_id);
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectValueChange(
-    const webkit_glue::WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateTree(acc_obj);
-  if (!new_browser_acc)
-    return;
-
-  LONG child_id = new_browser_acc->child_id();
-  NotifyWinEvent(
-      EVENT_OBJECT_VALUECHANGE, parent_hwnd_, OBJID_CLIENT, child_id);
-}
-
-LONG BrowserAccessibilityManager::GetNextChildID() {
-  // Get the next child ID, and wrap around when we get near the end
-  // of a 32-bit integer range. It's okay to wrap around; we just want
-  // to avoid it as long as possible because clients may cache the ID of
-  // an object for a while to determine if they've seen it before.
-  next_child_id_--;
-  if (next_child_id_ == -2000000000)
-    next_child_id_ = -1;
-
-  return next_child_id_;
-}
-
-BrowserAccessibility* BrowserAccessibilityManager::CreateAccessibilityTree(
-    BrowserAccessibility* parent,
-    int child_id,
-    const webkit_glue::WebAccessibility& src,
-    int index_in_parent) {
-  BrowserAccessibility* instance = factory_->Create();
-
-  instance->Initialize(this, parent, child_id, index_in_parent, src);
-  child_id_map_[child_id] = instance;
-  renderer_id_to_child_id_map_[src.id] = child_id;
-  if ((src.state >> WebAccessibility::STATE_FOCUSED) & 1)
-    focus_ = instance;
-  for (int i = 0; i < static_cast<int>(src.children.size()); ++i) {
-    BrowserAccessibility* child = CreateAccessibilityTree(
-        instance, GetNextChildID(), src.children[i], i);
-    instance->AddChild(child);
-  }
-
-  return instance;
-}