text: /*
   * Copyright (C) 2012 Google Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above
   * copyright notice, this list of conditions and the following disclaimer
   * in the documentation and/or other materials provided with the
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include "web/WebHelperPluginImpl.h"
  
  #include "core/html/HTMLObjectElement.h"
  #include "core/loader/FrameLoader.h"
  #include "core/loader/FrameLoaderClient.h"
  #include "public/web/WebPlugin.h"
  #include "web/WebLocalFrameImpl.h"
  #include "web/WebPluginContainerImpl.h"
  
  namespace blink {
  
  DEFINE_TYPE_CASTS(WebHelperPluginImpl, WebHelperPlugin, plugin, true, true);
  
  WebHelperPlugin* WebHelperPlugin::create(const WebString& pluginType, WebLocalFrame* frame)
  {
      WebHelperPluginUniquePtr plugin(new WebHelperPluginImpl());
      if (!toWebHelperPluginImpl(plugin.get())->initialize(pluginType, toWebLocalFrameImpl(frame)))
          return 0;
      return plugin.release();
  }
  
  WebHelperPluginImpl::WebHelperPluginImpl()
      : m_destructionTimer(this, &WebHelperPluginImpl::reallyDestroy)
  {
  }
  
  WebHelperPluginImpl::~WebHelperPluginImpl()
  {
      // TODO(Oilpan): it is potentially problematic to support plugin
      // disposal during an Oilpan GC. If it happens, we need to know
      // and evaluate possible ways to handle it.
      DCHECK(!ThreadState::current()->sweepForbidden());
      if (m_pluginContainer)
          m_pluginContainer->dispose();
  }
  
  bool WebHelperPluginImpl::initialize(const String& pluginType, WebLocalFrameImpl* frame)
  {
      DCHECK(!m_objectElement && !m_pluginContainer);
      if (!frame->frame()->loader().client())
          return false;
  
      m_objectElement = HTMLObjectElement::create(*frame->frame()->document(), 0, false);
      Vector<String> attributeNames;
      Vector<String> attributeValues;
      DCHECK(frame->frame()->document()->url().isValid());
      m_pluginContainer = toWebPluginContainerImpl(frame->frame()->loader().client()->createPlugin(
          m_objectElement.get(),
          frame->frame()->document()->url(),
          attributeNames,
          attributeValues,
          pluginType,
          false,
          FrameLoaderClient::AllowDetachedPlugin));
  
      if (!m_pluginContainer)
          return false;
  
      // Getting a placeholder plugin is also failure, since it's not the plugin the caller needed.
      return !getPlugin()->isPlaceholder();
  }
  
  void WebHelperPluginImpl::reallyDestroy(Timer<WebHelperPluginImpl>*)
  {
      delete this;
  }
  
  void WebHelperPluginImpl::destroy()
  {
      // Defer deletion so we don't do too much work when called via stopActiveDOMObjects().
      // FIXME: It's not clear why we still need this. The original code held a Page and a
      // WebFrame, and destroying it would cause JavaScript triggered by frame detach to run,
      // which isn't allowed inside stopActiveDOMObjects(). Removing this causes one Chrome test
      // to fail with a timeout.
      m_destructionTimer.startOneShot(0, BLINK_FROM_HERE);
  }
  
  WebPlugin* WebHelperPluginImpl::getPlugin()
  {
      DCHECK(m_pluginContainer);
      DCHECK(m_pluginContainer->plugin());
      return m_pluginContainer->plugin();
  }
  
  } // namespace blink
  