Move browser accessibility code from chrome to content.

BUG=85932
TEST=none
Review URL: http://codereview.chromium.org/7233022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@90265 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 0 insertions, 373 deletions

diff --git a/chrome/browser/accessibility/browser_accessibility_manager.cc b/chrome/browser/accessibility/browser_accessibility_manager.cc
deleted file mode 100644
index 4c58228..0000000
--- a/chrome/browser/accessibility/browser_accessibility_manager.cc
+++ /dev/null
@@ -1,373 +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 "chrome/browser/accessibility/browser_accessibility_manager.h"
-
-#include "base/logging.h"
-#include "chrome/browser/accessibility/browser_accessibility.h"
-#include "content/common/view_messages.h"
-
-using webkit_glue::WebAccessibility;
-
-BrowserAccessibility* BrowserAccessibilityFactory::Create() {
-  return BrowserAccessibility::Create();
-}
-
-// 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;
-
-#if defined(OS_POSIX) && !defined(OS_MACOSX)
-// There's no OS-specific implementation of BrowserAccessibilityManager
-// on Unix, so just instantiate the base class.
-// static
-BrowserAccessibilityManager* BrowserAccessibilityManager::Create(
-    gfx::NativeView parent_view,
-    const WebAccessibility& src,
-    BrowserAccessibilityDelegate* delegate,
-    BrowserAccessibilityFactory* factory) {
-  return new BrowserAccessibilityManager(
-      parent_view, src, delegate, factory);
-}
-#endif
-
-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, src, 0);
-  if (!focus_)
-    SetFocus(root_, false);
-}
-
-// 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_;
-}
-
-BrowserAccessibilityManager::~BrowserAccessibilityManager() {
-  // Clients could still hold references to some nodes of the tree, so
-  // calling InternalReleaseReference 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 fail gracefully.
-  focus_->InternalReleaseReference(false);
-  root_->InternalReleaseReference(true);
-}
-
-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;
-  }
-}
-
-BrowserAccessibility* BrowserAccessibilityManager::GetFromRendererID(
-    int32 renderer_id) {
-  base::hash_map<int32, int32>::iterator iter =
-      renderer_id_to_child_id_map_.find(renderer_id);
-  if (iter == renderer_id_to_child_id_map_.end())
-    return NULL;
-
-  int32 child_id = iter->second;
-  return GetFromChildID(child_id);
-}
-
-void BrowserAccessibilityManager::Remove(int32 child_id, int32 renderer_id) {
-  child_id_map_.erase(child_id);
-  renderer_id_to_child_id_map_.erase(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_Type::
-          NOTIFICATION_TYPE_CHECK_STATE_CHANGED:
-        OnAccessibilityObjectStateChange(param.acc_obj);
-        break;
-      case ViewHostMsg_AccessibilityNotification_Type::
-          NOTIFICATION_TYPE_CHILDREN_CHANGED:
-        OnAccessibilityObjectChildrenChange(param.acc_obj);
-        break;
-      case ViewHostMsg_AccessibilityNotification_Type::
-          NOTIFICATION_TYPE_FOCUS_CHANGED:
-        OnAccessibilityObjectFocusChange(param.acc_obj);
-        break;
-      case ViewHostMsg_AccessibilityNotification_Type::
-          NOTIFICATION_TYPE_LOAD_COMPLETE:
-        OnAccessibilityObjectLoadComplete(param.acc_obj);
-        break;
-      case ViewHostMsg_AccessibilityNotification_Type::
-          NOTIFICATION_TYPE_VALUE_CHANGED:
-        OnAccessibilityObjectValueChange(param.acc_obj);
-        break;
-      case ViewHostMsg_AccessibilityNotification_Type::
-          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 = UpdateNode(acc_obj, false);
-  if (!new_browser_acc)
-    return;
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Type::
-          NOTIFICATION_TYPE_CHECK_STATE_CHANGED,
-      new_browser_acc);
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectChildrenChange(
-    const WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateNode(acc_obj, true);
-  if (!new_browser_acc)
-    return;
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Type::
-          NOTIFICATION_TYPE_CHILDREN_CHANGED,
-      new_browser_acc);
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectFocusChange(
-  const WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateNode(acc_obj, false);
-  if (!new_browser_acc)
-    return;
-
-  SetFocus(new_browser_acc, false);
-  if (delegate_ && delegate_->HasFocus()) {
-    GotFocus();
-  } else if (!delegate_) {
-    // Mac currently does not have a BrowserAccessibilityDelegate.
-    NotifyAccessibilityEvent(
-        ViewHostMsg_AccessibilityNotification_Type::
-        NOTIFICATION_TYPE_FOCUS_CHANGED,
-        focus_);
-  }
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectLoadComplete(
-  const WebAccessibility& acc_obj) {
-  SetFocus(NULL, false);
-  root_->InternalReleaseReference(true);
-
-  root_ = CreateAccessibilityTree(NULL, acc_obj, 0);
-  if (!focus_)
-    SetFocus(root_, false);
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Type::
-          NOTIFICATION_TYPE_LOAD_COMPLETE,
-      root_);
-  if (delegate_ && delegate_->HasFocus())
-    GotFocus();
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectValueChange(
-    const WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateNode(acc_obj, false);
-  if (!new_browser_acc)
-    return;
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Type::
-          NOTIFICATION_TYPE_VALUE_CHANGED,
-      new_browser_acc);
-}
-
-void BrowserAccessibilityManager::OnAccessibilityObjectTextChange(
-    const WebAccessibility& acc_obj) {
-  BrowserAccessibility* new_browser_acc = UpdateNode(acc_obj, false);
-  if (!new_browser_acc)
-    return;
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Type::
-          NOTIFICATION_TYPE_SELECTED_TEXT_CHANGED,
-      new_browser_acc);
-}
-
-void BrowserAccessibilityManager::GotFocus() {
-  // TODO(ctguil): Remove when tree update logic handles focus changes.
-  if (!focus_)
-    return;
-
-  NotifyAccessibilityEvent(
-      ViewHostMsg_AccessibilityNotification_Type::
-          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(
-    BrowserAccessibility* node, bool notify) {
-  if (focus_)
-    focus_->InternalReleaseReference(false);
-  focus_ = node;
-  if (focus_)
-    focus_->InternalAddReference();
-
-  if (notify && node && delegate_)
-    delegate_->SetAccessibilityFocus(node->renderer_id());
-}
-
-void BrowserAccessibilityManager::DoDefaultAction(
-    const BrowserAccessibility& node) {
-  if (delegate_)
-    delegate_->AccessibilityDoDefaultAction(node.renderer_id());
-}
-
-gfx::Rect BrowserAccessibilityManager::GetViewBounds() {
-  if (delegate_)
-    return delegate_->GetViewBounds();
-  return gfx::Rect();
-}
-
-BrowserAccessibility* BrowserAccessibilityManager::UpdateNode(
-    const WebAccessibility& src,
-    bool include_children) {
-  base::hash_map<int32, int32>::iterator iter =
-      renderer_id_to_child_id_map_.find(src.id);
-  if (iter == renderer_id_to_child_id_map_.end())
-    return NULL;
-
-  int32 child_id = iter->second;
-  BrowserAccessibility* current = GetFromChildID(child_id);
-  if (!current)
-    return NULL;
-
-  if (!include_children) {
-    DCHECK_EQ(0U, src.children.size());
-    current->Initialize(
-        this,
-        current->parent(),
-        current->child_id(),
-        current->index_in_parent(),
-        src);
-    return current;
-  }
-
-  BrowserAccessibility* current_parent = current->parent();
-  int current_index_in_parent = current->index_in_parent();
-
-  // Detach all of the nodes in the old tree and get a single flat vector
-  // of all node pointers.
-  std::vector<BrowserAccessibility*> old_tree_nodes;
-  current->DetachTree(&old_tree_nodes);
-
-  // Build a new tree, reusing old nodes if possible. Each node that's
-  // reused will have its reference count incremented by one.
-  current =
-      CreateAccessibilityTree(current_parent, src, current_index_in_parent);
-
-  // Decrement the reference count of all nodes in the old tree, which will
-  // delete any nodes no longer needed.
-  for (int i = 0; i < static_cast<int>(old_tree_nodes.size()); i++)
-    old_tree_nodes[i]->InternalReleaseReference(false);
-
-  DCHECK(focus_);
-  if (!focus_->instance_active())
-    SetFocus(root_, false);
-
-  return current;
-}
-
-BrowserAccessibility* BrowserAccessibilityManager::CreateAccessibilityTree(
-    BrowserAccessibility* parent,
-    const WebAccessibility& src,
-    int index_in_parent) {
-  BrowserAccessibility* instance = NULL;
-  int32 child_id = 0;
-  base::hash_map<int32, int32>::iterator iter =
-      renderer_id_to_child_id_map_.find(src.id);
-
-  // If a BrowserAccessibility instance for this ID already exists, add a
-  // new reference to it and retrieve its children vector.
-  if (iter != renderer_id_to_child_id_map_.end()) {
-    child_id = iter->second;
-    instance = GetFromChildID(child_id);
-  }
-
-  // If the node has changed roles, don't reuse a BrowserAccessibility
-  // object, that could confuse a screen reader.
-  if (instance && instance->role() != src.role)
-    instance = NULL;
-
-  // If we're reusing a node, it should already be detached from a parent
-  // and any children. If not, that means we have a serious bug somewhere,
-  // like the same child is reachable from two places in the same tree.
-  if (instance && (instance->parent() != NULL || instance->child_count() > 0)) {
-    NOTREACHED();
-    instance = NULL;
-  }
-
-  if (instance) {
-    // If we're reusing a node, update its parent and increment its
-    // reference count.
-    instance->UpdateParent(parent, index_in_parent);
-    instance->InternalAddReference();
-  } else {
-    // Otherwise, create a new instance.
-    instance = factory_->Create();
-    child_id = GetNextChildID();
-  }
-
-  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)
-    SetFocus(instance, false);
-  for (int i = 0; i < static_cast<int>(src.children.size()); ++i) {
-    BrowserAccessibility* child = CreateAccessibilityTree(
-        instance, src.children[i], i);
-    instance->AddChild(child);
-  }
-
-  return instance;
-}