/platform/external/webkit/WebCore/bindings/v8/V8NodeFilterCondition.cpp

https://github.com/aharish/totoro-gb-opensource-update2 · C++ · 90 lines · 45 code · 16 blank · 29 comment · 2 complexity · 45c57abe28470cdf48d783cf10abe6ca MD5 · raw file

  1. /*
  2. * Copyright (C) 2008, 2009 Google Inc. All rights reserved.
  3. *
  4. * Redistribution and use in source and binary forms, with or without
  5. * modification, are permitted provided that the following conditions are
  6. * met:
  7. *
  8. * * Redistributions of source code must retain the above copyright
  9. * notice, this list of conditions and the following disclaimer.
  10. * * Redistributions in binary form must reproduce the above
  11. * copyright notice, this list of conditions and the following disclaimer
  12. * in the documentation and/or other materials provided with the
  13. * distribution.
  14. * * Neither the name of Google Inc. nor the names of its
  15. * contributors may be used to endorse or promote products derived from
  16. * this software without specific prior written permission.
  17. *
  18. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21. * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22. * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25. * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26. * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29. */
  30. #include "config.h"
  31. #include "V8NodeFilterCondition.h"
  32. #include "Node.h"
  33. #include "NodeFilter.h"
  34. #include "ScriptState.h"
  35. #include "V8Node.h"
  36. #include "V8Proxy.h"
  37. #include <wtf/OwnArrayPtr.h>
  38. namespace WebCore {
  39. V8NodeFilterCondition::V8NodeFilterCondition(v8::Handle<v8::Value> filter)
  40. : m_filter(v8::Persistent<v8::Value>::New(filter))
  41. {
  42. #ifndef NDEBUG
  43. V8GCController::registerGlobalHandle(NODE_FILTER, this, m_filter);
  44. #endif
  45. }
  46. V8NodeFilterCondition::~V8NodeFilterCondition()
  47. {
  48. #ifndef NDEBUG
  49. V8GCController::unregisterGlobalHandle(this, m_filter);
  50. #endif
  51. m_filter.Dispose();
  52. m_filter.Clear();
  53. }
  54. short V8NodeFilterCondition::acceptNode(ScriptState* state, Node* node) const
  55. {
  56. ASSERT(v8::Context::InContext());
  57. if (!m_filter->IsFunction())
  58. return NodeFilter::FILTER_ACCEPT;
  59. v8::TryCatch exceptionCatcher;
  60. v8::Handle<v8::Object> object = v8::Context::GetCurrent()->Global();
  61. v8::Handle<v8::Function> callback = v8::Handle<v8::Function>::Cast(m_filter);
  62. OwnArrayPtr<v8::Handle<v8::Value> > args(new v8::Handle<v8::Value>[1]);
  63. args[0] = toV8(node);
  64. V8Proxy* proxy = V8Proxy::retrieve();
  65. ASSERT(proxy);
  66. v8::Handle<v8::Value> result = proxy->callFunction(callback, object, 1, args.get());
  67. if (exceptionCatcher.HasCaught()) {
  68. state->setException(exceptionCatcher.Exception());
  69. return NodeFilter::FILTER_REJECT;
  70. }
  71. ASSERT(!result.IsEmpty());
  72. return result->Int32Value();
  73. }
  74. } // namespace WebCore