third_party/WebKit/Source/core/exported/WebHelperPluginImpl.cpp

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
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#include "core/exported/WebHelperPluginImpl.h"

#include "core/exported/WebPluginContainerImpl.h"
#include "core/frame/LocalFrameClient.h"
#include "core/frame/WebLocalFrameImpl.h"
#include "core/html/HTMLObjectElement.h"
#include "public/platform/TaskType.h"
#include "public/web/WebPlugin.h"

namespace blink {

DEFINE_TYPE_CASTS(WebHelperPluginImpl, WebHelperPlugin, plugin, true, true);

WebHelperPlugin* WebHelperPlugin::Create(const WebString& plugin_type,
                                         WebLocalFrame* frame) {
  WebHelperPluginUniquePtr plugin(new WebHelperPluginImpl());
  if (!ToWebHelperPluginImpl(plugin.get())
           ->Initialize(plugin_type, ToWebLocalFrameImpl(frame)))
    return nullptr;
  return plugin.release();
}

bool WebHelperPluginImpl::Initialize(const String& plugin_type,
                                     WebLocalFrameImpl* frame) {
  DCHECK(!object_element_ && !plugin_container_);
  if (!frame->GetFrame()->Client())
    return false;

  object_element_ =
      HTMLObjectElement::Create(*frame->GetFrame()->GetDocument(), false);
  Vector<String> attribute_names;
  Vector<String> attribute_values;
  DCHECK(frame->GetFrame()->GetDocument()->Url().IsValid());
  plugin_container_ = frame->GetFrame()->Client()->CreatePlugin(
      *object_element_, frame->GetFrame()->GetDocument()->Url(),
      attribute_names, attribute_values, plugin_type, false,
      LocalFrameClient::kAllowDetachedPlugin);

  if (!plugin_container_)
    return false;

  // Getting a placeholder plugin is also failure, since it's not the plugin the
  // caller needed.
  return !GetPlugin()->IsPlaceholder();
}

void WebHelperPluginImpl::ReallyDestroy() {
  if (plugin_container_)
    plugin_container_->Dispose();
  delete this;
}

void WebHelperPluginImpl::Destroy() {
  // Defer deletion so we don't do too much work when called via
  // stopPausableObjects().
  // 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 stopPausableObjects().
  // Removing this causes one Chrome test to fail with a timeout.
  object_element_->GetDocument()
      .GetTaskRunner(TaskType::kUnspecedTimer)
      ->PostTask(FROM_HERE, WTF::Bind(&WebHelperPluginImpl::ReallyDestroy,
                                      WTF::Unretained(this)));
}

WebPlugin* WebHelperPluginImpl::GetPlugin() {
  DCHECK(plugin_container_);
  DCHECK(plugin_container_->Plugin());
  return plugin_container_->Plugin();
}

}  // namespace blink