content/renderer/do_not_track_bindings.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/renderer/do_not_track_bindings.h"
   6
   7 #include "content/renderer/render_view_impl.h"
   8 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
   9 #include "v8/include/v8.h"
  10
  11 using WebKit::WebFrame;
  12
  13 namespace content {
  14
  15 namespace {
  16
  17 v8::Handle<v8::Value> GetDoNotTrack(v8::Local<v8::String> property,
  18                                     const v8::AccessorInfo& info) {
  19   WebFrame* frame = WebFrame::frameForCurrentContext();
  20   if (!frame)
  21     return v8::Null();
  22   RenderViewImpl* view = RenderViewImpl::FromWebView(frame->view());
  23   if (!view)
  24     return v8::Null();
  25   if (view->enable_do_not_track())
  26     return v8::String::New("1");
  27   return v8::Null();
  28 }
  29
  30 }  // namespace
  31
  32 void InjectDoNotTrackBindings(WebFrame* frame) {
  33   v8::HandleScope handle_scope;
  34
  35   v8::Handle<v8::Context> v8_context = frame->mainWorldScriptContext();
  36   if (v8_context.IsEmpty())
  37     return;
  38
  39   v8::Context::Scope scope(v8_context);
  40
  41   v8::Handle<v8::Object> global = v8_context->Global();
  42   v8::Handle<v8::Object> navigator =
  43       global->Get(v8::String::New("navigator"))->ToObject();
  44   if (navigator.IsEmpty())
  45     return;
  46   navigator->SetAccessor(v8::String::New("doNotTrack"), GetDoNotTrack);
  47 }
  48
  49 }  // namespace content