Move some accessibility methods, enums and interfaces into the content/public API.

content/browser/accessibility/accessibility_tree_formatter_impl.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_impl.h"
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/string_util.h"
+#include "base/utf_string_conversions.h"
+#include "content/browser/accessibility/browser_accessibility_manager.h"
+#include "content/port/browser/render_widget_host_view_port.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/browser/web_contents.h"
+
+namespace content {
+namespace {
+const int kIndentSpaces = 4;
+const char* kSkipString = "@NO_DUMP";
+}
+
+AccessibilityTreeFormatterImpl::AccessibilityTreeFormatterImpl(
+    BrowserAccessibility* node)
+    : node_(node) {
+  Initialize();
+}
+
+// static
+AccessibilityTreeFormatter* AccessibilityTreeFormatter::Create(
+    RenderViewHost* rvh) {
+  RenderWidgetHostViewPort* host_view = static_cast<RenderWidgetHostViewPort*>(
+      WebContents::FromRenderViewHost(rvh)->GetRenderWidgetHostView());
+
+  content::BrowserAccessibilityManager* manager =
+      host_view->GetBrowserAccessibilityManager();
+  if (!manager)
+    return NULL;
+
+  content::BrowserAccessibility* root = manager->GetRoot();
+  return new AccessibilityTreeFormatterImpl(root);
+}
+
+
+AccessibilityTreeFormatterImpl::~AccessibilityTreeFormatterImpl() {
+}
+
+void AccessibilityTreeFormatterImpl::FormatAccessibilityTree(
+    string16* contents) {
+  RecursiveFormatAccessibilityTree(node_, contents, 0);
+}
+
+void AccessibilityTreeFormatterImpl::RecursiveFormatAccessibilityTree(
+    BrowserAccessibility* node, string16* contents, int indent) {
+  scoped_array<char> prefix(new char[indent + 1]);
+  for (int i = 0; i < indent; ++i)
+    prefix[i] = ' ';
+  prefix[indent] = '\0';
+
+  string16 line = ToString(node, prefix.get());
+  if (line.find(ASCIIToUTF16(kSkipString)) != string16::npos)
+    return;
+
+  *contents += line;
+  for (size_t i = 0; i < node->children().size(); ++i) {
+    RecursiveFormatAccessibilityTree(node->children()[i], contents,
+                                     indent + kIndentSpaces);
+  }
+}
+
+void AccessibilityTreeFormatterImpl::SetFilters(
+    const std::vector<Filter>& filters) {
+  filters_ = filters;
+}
+
+bool AccessibilityTreeFormatterImpl::MatchesFilters(
+    const string16& text, bool default_result) const {
+  std::vector<Filter>::const_iterator iter = filters_.begin();
+  bool allow = default_result;
+  for (iter = filters_.begin(); iter != filters_.end(); ++iter) {
+    if (MatchPattern(text, iter->match_str)) {
+      if (iter->type == Filter::ALLOW_EMPTY)
+        allow = true;
+      else if (iter->type == Filter::ALLOW)
+        allow = (!MatchPattern(text, UTF8ToUTF16("*=''")));
+      else
+        allow = false;
+    }
+  }
+  return allow;
+}
+
+void AccessibilityTreeFormatterImpl::StartLine() {
+  line_.clear();
+}
+
+void AccessibilityTreeFormatterImpl::Add(
+    bool include_by_default, const string16& attr) {
+  if (attr.empty())
+    return;
+  if (!MatchesFilters(attr, include_by_default))
+    return;
+  if (!line_.empty())
+    line_ += ASCIIToUTF16(" ");
+  line_ += attr;
+}
+
+string16 AccessibilityTreeFormatterImpl::FinishLine() {
+  return line_;
+}
+
+}  // namespace content