Revert 61704 - Make BrowserAccessibilityManager cross platform. Step 2. In Pr...

chrome/browser/accessibility/browser_accessibility_manager.cc

 // 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/accessibility/browser_accessibility_manager.h"
 
-#include "chrome/browser/accessibility/browser_accessibility.h"
+#include "chrome/common/render_messages_params.h"
 
 using webkit_glue::WebAccessibility;
 
-// 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.
-// static
-int32 BrowserAccessibilityManager::next_child_id_ = -1;
-
-BrowserAccessibility* BrowserAccessibilityFactory::Create() {
-  return BrowserAccessibility::Create();
-}
 
 BrowserAccessibilityManager::BrowserAccessibilityManager(
-    gfx::NativeView parent_view,
-      const WebAccessibility& src,
-      BrowserAccessibilityDelegate* delegate,
-      BrowserAccessibilityFactory* factory)
-    : parent_view_(parent_view),
-      delegate_(delegate),
-      factory_(factory),
-      focus_(NULL) {
-  root_ = CreateAccessibilityTree(NULL, GetNextChildID(), src, 0);
-  if (!focus_)
-    focus_ = root_;
-}
-
-// static
-int32 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_;
+    gfx::NativeWindow parent_window)
+    : parent_window_(parent_window) {
 }
 
 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_->ReleaseTree();
-  root_->ReleaseReference();
-}
-
-BrowserAccessibility* BrowserAccessibilityManager::GetRoot() {
-  return root_;
-}
-
-BrowserAccessibility* BrowserAccessibilityManager::GetFromChildID(
-    int32 child_id) {
-  base::hash_map<int32, BrowserAccessibility*>::iterator iter =
-      child_id_map_.find(child_id);
-  if (iter != child_id_map_.end()) {
-    return iter->second;
-  } else {
-    return NULL;
-  }
-}
-
-void BrowserAccessibilityManager::Remove(int32 child_id) {
-  child_id_map_.erase(child_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:
@@ skipping 19 matching lines @@
           NOTIFICATION_TYPE_SELECTED_TEXT_CHANGED:
         OnAccessibilityObjectTextChange(param.acc_obj);
         break;
       default:
         DCHECK(0);
         break;
     }
   }
 }
 
-void BrowserAccessibilityManager::OnAccessibilityObjectStateChange(
-    const WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateTree(acc_obj);
-  if (!new_browser_acc)
-    return;
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Params::
-          NOTIFICATION_TYPE_CHECK_STATE_CHANGED,
-      new_browser_acc);
+gfx::NativeWindow BrowserAccessibilityManager::GetParentWindow() {
+  return parent_window_;
 }
-
-void BrowserAccessibilityManager::OnAccessibilityObjectChildrenChange(
-    const WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateTree(acc_obj);
-  if (!new_browser_acc)
-    return;
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Params::
-          NOTIFICATION_TYPE_CHILDREN_CHANGED,
-      new_browser_acc);
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectFocusChange(
-  const WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateTree(acc_obj);
-  if (!new_browser_acc)
-    return;
-
-  focus_ = new_browser_acc;
-  if (delegate_ && delegate_->HasFocus())
-    GotFocus();
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectLoadComplete(
-  const WebAccessibility& acc_obj) {
-  root_->ReleaseTree();
-  root_->ReleaseReference();
-  focus_ = NULL;
-
-  root_ = CreateAccessibilityTree(NULL, GetNextChildID(), acc_obj, 0);
-  if (!focus_)
-    focus_ = root_;
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Params::
-          NOTIFICATION_TYPE_LOAD_COMPLETE,
-      root_);
-  if (delegate_ && delegate_->HasFocus())
-    GotFocus();
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectValueChange(
-    const WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateTree(acc_obj);
-  if (!new_browser_acc)
-    return;
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Params::
-          NOTIFICATION_TYPE_VALUE_CHANGED,
-      root_);
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectTextChange(
-    const WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateTree(acc_obj);
-  if (!new_browser_acc)
-    return;
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Params::
-          NOTIFICATION_TYPE_SELECTED_TEXT_CHANGED,
-      root_);
-}
-
-void BrowserAccessibilityManager::GotFocus() {
-  // TODO(ctguil): Remove when tree update logic handles focus changes.
-  if (!focus_)
-    return;
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Params::
-          NOTIFICATION_TYPE_FOCUS_CHANGED,
-      focus_);
-}
-
-gfx::NativeView BrowserAccessibilityManager::GetParentView() {
-  return parent_view_;
-}
-
-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());
-}
-
-bool BrowserAccessibilityManager::CanModifyTreeInPlace(
-    BrowserAccessibility* current_root,
-    const WebAccessibility& new_root) {
-  if (current_root->renderer_id() != new_root.id)
-    return false;
-  if (current_root->GetChildCount() != new_root.children.size())
-    return false;
-  for (unsigned int i = 0; i < current_root->GetChildCount(); i++) {
-    if (!CanModifyTreeInPlace(current_root->GetChild(i),
-                              new_root.children[i])) {
-      return false;
-    }
-  }
-  return true;
-}
-
-void BrowserAccessibilityManager::ModifyTreeInPlace(
-      BrowserAccessibility* current_root,
-      const WebAccessibility& new_root) {
-  DCHECK_EQ(current_root->renderer_id(), new_root.id);
-  DCHECK_EQ(current_root->GetChildCount(), new_root.children.size());
-  for (unsigned int i = 0; i < current_root->GetChildCount(); i++)
-    ModifyTreeInPlace(current_root->GetChild(i), new_root.children[i]);
-  current_root->Initialize(
-      this,
-      current_root->GetParent(),
-      current_root->child_id(),
-      current_root->index_in_parent(),
-      new_root);
-}
-
-
-BrowserAccessibility* BrowserAccessibilityManager::UpdateTree(
-    const WebAccessibility& acc_obj) {
-  base::hash_map<int, int32>::iterator iter =
-      renderer_id_to_child_id_map_.find(acc_obj.id);
-  if (iter == renderer_id_to_child_id_map_.end())
-    return NULL;
-
-  int32 child_id = iter->second;
-  BrowserAccessibility* old_browser_acc = GetFromChildID(child_id);
-  if (!old_browser_acc)
-    return NULL;
-
-  if (CanModifyTreeInPlace(old_browser_acc, acc_obj)) {
-    ModifyTreeInPlace(old_browser_acc, acc_obj);
-    return old_browser_acc;
-  }
-
-  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->ReleaseTree();
-    old_browser_acc->ReleaseReference();
-    child_id_map_[child_id] = new_browser_acc;
-
-    return new_browser_acc;
-}
-
-BrowserAccessibility* BrowserAccessibilityManager::CreateAccessibilityTree(
-    BrowserAccessibility* parent,
-    int child_id,
-    const 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;
-}