Revert 46567 - Reimplement accessibility of web content by caching the entire...

chrome/renderer/render_view.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/renderer/render_view.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 56 matching lines @@
 #include "gfx/native_widget_types.h"
 #include "grit/generated_resources.h"
 #include "grit/renderer_resources.h"
 #include "net/base/data_url.h"
 #include "net/base/escape.h"
 #include "net/base/net_errors.h"
 #include "skia/ext/bitmap_platform_device.h"
 #include "skia/ext/image_operations.h"
 #include "third_party/cld/encodings/compact_lang_det/win/cld_unicodetext.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebAccessibilityCache.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebAccessibilityObject.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebCString.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebDataSource.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebDevToolsAgent.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebDocument.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebDragData.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebFileChooserParams.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebFormControlElement.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebFormElement.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebFrame.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebHistoryItem.h"
@@ skipping 541 matching lines @@
     IPC_MESSAGE_HANDLER(ViewMsg_SetAltErrorPageURL, OnSetAltErrorPageURL)
     IPC_MESSAGE_HANDLER(ViewMsg_InstallMissingPlugin, OnInstallMissingPlugin)
     IPC_MESSAGE_HANDLER(ViewMsg_RunFileChooserResponse, OnFileChooserResponse)
     IPC_MESSAGE_HANDLER(ViewMsg_EnableViewSourceMode, OnEnableViewSourceMode)
     IPC_MESSAGE_HANDLER(ViewMsg_GetAllSavableResourceLinksForCurrentPage,
                         OnGetAllSavableResourceLinksForCurrentPage)
     IPC_MESSAGE_HANDLER(
         ViewMsg_GetSerializedHtmlDataForCurrentPageWithLocalLinks,
         OnGetSerializedHtmlDataForCurrentPageWithLocalLinks)
     IPC_MESSAGE_HANDLER(ViewMsg_GetApplicationInfo, OnGetApplicationInfo)
+    IPC_MESSAGE_HANDLER(ViewMsg_GetAccessibilityInfo, OnGetAccessibilityInfo)
+    IPC_MESSAGE_HANDLER(ViewMsg_ClearAccessibilityInfo,
+                        OnClearAccessibilityInfo)
     IPC_MESSAGE_HANDLER(ViewMsg_ShouldClose, OnMsgShouldClose)
     IPC_MESSAGE_HANDLER(ViewMsg_ClosePage, OnClosePage)
     IPC_MESSAGE_HANDLER(ViewMsg_ThemeChanged, OnThemeChanged)
     IPC_MESSAGE_HANDLER(ViewMsg_HandleMessageFromExternalHost,
                         OnMessageFromExternalHost)
     IPC_MESSAGE_HANDLER(ViewMsg_DisassociateFromPopupCount,
                         OnDisassociateFromPopupCount)
     IPC_MESSAGE_HANDLER(ViewMsg_AutoFillSuggestionsReturned,
                         OnAutoFillSuggestionsReturned)
     IPC_MESSAGE_HANDLER(ViewMsg_AutoFillForms, OnAutoFillForms)
@@ skipping 25 matching lines @@
     IPC_MESSAGE_HANDLER(ViewMsg_WindowFrameChanged, OnWindowFrameChanged)
 #endif
     IPC_MESSAGE_HANDLER(ViewMsg_SetEditCommandsForNextKeyEvent,
                         OnSetEditCommandsForNextKeyEvent)
     IPC_MESSAGE_HANDLER(ViewMsg_ExecuteCode,
                         OnExecuteCode)
     IPC_MESSAGE_HANDLER(ViewMsg_CustomContextMenuAction,
                         OnCustomContextMenuAction)
     IPC_MESSAGE_HANDLER(ViewMsg_TranslatePage, OnTranslatePage)
     IPC_MESSAGE_HANDLER(ViewMsg_RevertTranslation, OnRevertTranslation)
-    IPC_MESSAGE_HANDLER(ViewMsg_GetAccessibilityTree, OnGetAccessibilityTree)
 
     // Have the super handle all other messages.
     IPC_MESSAGE_UNHANDLED(RenderWidget::OnMessageReceived(message))
   IPC_END_MESSAGE_MAP()
 }
 
 void RenderView::SendThumbnail() {
   WebFrame* main_frame = webview()->mainFrame();
   if (!main_frame)
     return;
@@ skipping 630 matching lines @@
     Send(new ViewHostMsg_FrameNavigate(routing_id_, params));
   }
 
   last_page_id_sent_to_browser_ =
       std::max(last_page_id_sent_to_browser_, page_id_);
 
   // If we end up reusing this WebRequest (for example, due to a #ref click),
   // we don't want the transition type to persist.  Just clear it.
   navigation_state->set_transition_type(PageTransition::LINK);
 
+#if defined(OS_WIN)
   if (accessibility_.get()) {
-    accessibility_->clear();
+    // Remove accessibility info cache.
     accessibility_.reset();
   }
+#else
+  // TODO(port): accessibility not yet implemented. See http://crbug.com/8288.
+#endif
 }
 
 // Tell the embedding application that the title of the active page has changed
 void RenderView::UpdateTitle(WebFrame* frame, const string16& title) {
   // Ignore all but top level navigations...
   if (!frame->parent()) {
     Send(new ViewHostMsg_UpdateTitle(
         routing_id_,
         page_id_,
         UTF16ToWideHack(title.length() > chrome::kMaxTitleChars ?
@@ skipping 2549 matching lines @@
       ExtensionProcessBindings::SetViewType(webview(), type);
     }
   }
   view_type_ = type;
 }
 
 void RenderView::OnUpdateBrowserWindowId(int window_id) {
   browser_window_id_ = window_id;
 }
 
-void RenderView::OnGetAccessibilityTree() {
-  if (accessibility_.get()) {
+void RenderView::OnGetAccessibilityInfo(
+    const webkit_glue::WebAccessibility::InParams& in_params,
+    webkit_glue::WebAccessibility::OutParams* out_params) {
+#if defined(OS_WIN)
+  if (!accessibility_.get()) {
+    // TODO(dglazkov): Once implemented for all ports, remove lazy
+    // instantiation of accessibility_.
+    accessibility_.reset(WebAccessibilityCache::create());
+    accessibility_->initialize(webview());
+  }
+
+  out_params->return_code =
+      webkit_glue::WebAccessibility::GetAccObjInfo(accessibility_.get(),
+                                                  in_params,
+                                                  out_params);
+
+#else  // defined(OS_WIN)
+  // TODO(port): accessibility not yet implemented
+  NOTIMPLEMENTED();
+#endif
+}
+
+void RenderView::OnClearAccessibilityInfo(int acc_obj_id, bool clear_all) {
+#if defined(OS_WIN)
+  if (!accessibility_.get()) {
+    // If accessibility is not activated, ignore clearing message.
+    return;
+  }
+
+  if (clear_all) {
     accessibility_->clear();
+    return;
   }
-  accessibility_.reset(WebAccessibilityCache::create());
-  accessibility_->initialize(webview());
 
-  WebAccessibilityObject src_tree = webview()->accessibilityObject();
-  webkit_glue::WebAccessibility dst_tree(src_tree, accessibility_.get());
-  Send(new ViewHostMsg_AccessibilityTree(routing_id_, dst_tree));
+  accessibility_->remove(acc_obj_id);
+
+#else  // defined(OS_WIN)
+  // TODO(port): accessibility not yet implemented
+  NOTIMPLEMENTED();
+#endif
 }
 
 void RenderView::OnGetAllSavableResourceLinksForCurrentPage(
     const GURL& page_url) {
   // Prepare list to storage all savable resource links.
   std::vector<GURL> resources_list;
   std::vector<GURL> referrers_list;
   std::vector<GURL> frames_list;
   webkit_glue::SavableResourcesResult result(&resources_list,
                                              &referrers_list,
@@ skipping 1009 matching lines @@
 
     if (last_top_level_navigation_page_id_ != page_id_ &&
         // Not interested in reloads.
         type != WebKit::WebNavigationTypeReload &&
         type != WebKit::WebNavigationTypeFormSubmitted) {
       return true;
     }
   }
   return false;
 }