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// Copyright 2008, 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.
// TODO: Need mechanism to cleanup the static instance
#ifndef WEBKIT_GLUE_PLUGIN_PLUGIN_HOST_H__
#define WEBKIT_GLUE_PLUGIN_PLUGIN_HOST_H__
#include <string>
#include <vector>
#include <map>
#include "base/ref_counted.h"
#include "base/gfx/rect.h"
#include "base/task.h"
#include "webkit/glue/plugins/nphostapi.h"
#include "third_party/npapi/bindings/npapi.h"
namespace NPAPI
{
class PluginInstance;
// The Plugin Host implements the NPN_xxx functions for NPAPI plugins.
// These are the functions exposed from the Plugin Host for use
// by the Plugin.
//
// The PluginHost is managed as a singleton. This isn't strictly
// necessary, but since the callback functions are all global C
// functions, there is really no point in having per-instance PluginHosts.
class PluginHost : public base::RefCounted<PluginHost> {
public:
// Access the single PluginHost instance. Callers
// must call deref() when finished with the object.
static PluginHost *Singleton();
virtual ~PluginHost();
// The table of functions provided to the plugin.
NPNetscapeFuncs *host_functions() { return &host_funcs_; }
// Helper function for parsing post headers, and applying attributes
// to the stream. NPAPI post data include headers + data combined.
// This function parses it out and adds it to the stream in a WebKit
// style.
static bool SetPostData(const char *buf,
uint32 length,
std::vector<std::string>* names,
std::vector<std::string>* values,
std::vector<char>* body);
void PatchNPNetscapeFuncs(NPNetscapeFuncs* overrides);
// Handles invalidateRect requests for windowless plugins.
void InvalidateRect(NPP id, NPRect* invalidRect);
private:
PluginHost();
void InitializeHostFuncs();
// For certain plugins like flash we need to throttle invalidateRect
// requests as they are made at a high frequency.
void OnInvalidateRect(NPP id, PluginInstance* instance);
static scoped_refptr<PluginHost> singleton_;
NPNetscapeFuncs host_funcs_;
DISALLOW_EVIL_CONSTRUCTORS(PluginHost);
// This structure keeps track of individual plugin instance invalidates.
struct ThrottledInvalidates {
std::vector<gfx::Rect> throttled_invalidates;
};
// We need to track throttled invalidate rects on a per plugin instance
// basis.
typedef std::map<NPP, ThrottledInvalidates> InstanceThrottledInvalidatesMap;
InstanceThrottledInvalidatesMap instance_throttled_invalidates_;
ScopedRunnableMethodFactory<PluginHost> throttle_factory_;
};
} // namespace NPAPI
#endif // WEBKIT_GLUE_PLUGIN_PLUGIN_HOST_H__
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