Add option to not dump childrens of a node in AX Tree.

content/browser/accessibility/accessibility_tree_formatter.cc

 // Copyright (c) 2012 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 "content/browser/accessibility/accessibility_tree_formatter.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/web_contents.h"
 
 namespace content {
 namespace {
 const char kIndentSymbol = '+';
 const int kIndentSymbolCount = 2;
 const char* kSkipString = "@NO_DUMP";
+const char* kSkipChildren = "@NO_CHILDREN_DUMP";
 const char* kChildrenDictAttr = "children";
 }
 
 AccessibilityTreeFormatter::AccessibilityTreeFormatter(
     BrowserAccessibility* root)
     : root_(root),
       show_ids_(false) {
   Initialize();
 }
 
@@ skipping 44 matching lines @@
 
 void AccessibilityTreeFormatter::RecursiveFormatAccessibilityTree(
     const base::DictionaryValue& dict, base::string16* contents, int depth) {
   base::string16 indent = base::string16(depth * kIndentSymbolCount,
                                          kIndentSymbol);
   base::string16 line = indent + ToString(dict);
   if (line.find(base::ASCIIToUTF16(kSkipString)) != base::string16::npos)
     return;
 
   *contents += line + base::ASCIIToUTF16("\n");
+  if (line.find(base::ASCIIToUTF16(kSkipChildren)) != base::string16::npos)
+    return;
+
   const base::ListValue* children;
   dict.GetList(kChildrenDictAttr, &children);
   const base::DictionaryValue* child_dict;
   for (size_t i = 0; i < children->GetSize(); i++) {
     children->GetDictionary(i, &child_dict);
     RecursiveFormatAccessibilityTree(*child_dict, contents, depth + 1);
   }
 }
 
 #if (!defined(OS_WIN) && !defined(OS_MACOSX) && !defined(OS_ANDROID))
@@ skipping 90 matching lines @@
   if (attr.empty())
     return;
   if (!MatchesFilters(attr, include_by_default))
     return;
   if (!line->empty())
     *line += base::ASCIIToUTF16(" ");
   *line += attr;
 }
 
 }  // namespace content