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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "base/native_library.h"
#include "build/build_config.h"
#include "content/child/npapi/webplugin.h"
#include "content/common/content_export.h"
#include "content/public/common/webplugininfo.h"
#include "third_party/npapi/bindings/nphostapi.h"
namespace base {
class FilePath;
namespace content {
class PluginInstance;
// This struct holds entry points into a plugin. The entry points are
// slightly different between Win/Mac and Unixes. Note that the interface for
// querying plugins is synchronous and it is preferable to use a higher-level
// asynchronous information to query information.
struct PluginEntryPoints {
#if !defined(OS_POSIX) || defined(OS_MACOSX)
NP_GetEntryPointsFunc np_getentrypoints;
NP_InitializeFunc np_initialize;
NP_ShutdownFunc np_shutdown;
// A PluginLib is a single NPAPI Plugin Library, and is the lifecycle
// manager for new PluginInstances.
class CONTENT_EXPORT PluginLib : public base::RefCounted<PluginLib> {
static PluginLib* CreatePluginLib(const base::FilePath& filename);
// Unloads all the loaded plugin libraries and cleans up the plugin map.
static void UnloadAllPlugins();
// Shuts down all loaded plugin instances.
static void ShutdownAllPlugins();
// Get the Plugin's function pointer table.
NPPluginFuncs* functions();
// Creates a new instance of this plugin.
PluginInstance* CreateInstance(const std::string& mime_type);
// Called by the instance when the instance is tearing down.
void CloseInstance();
// Gets information about this plugin and the mime types that it
// supports.
const WebPluginInfo& plugin_info() { return web_plugin_info_; }
// NPAPI functions
// NPAPI method to initialize a Plugin.
// Initialize can be safely called multiple times
NPError NP_Initialize();
// NPAPI method to shutdown a Plugin.
void NP_Shutdown(void);
// NPAPI method to clear locally stored data (LSO's or "Flash cookies").
NPError NP_ClearSiteData(const char* site, uint64 flags, uint64 max_age);
// NPAPI method to get a NULL-terminated list of all sites under which data
// is stored.
char** NP_GetSitesWithData();
int instance_count() const { return instance_count_; }
// Prevents the library code from being unload when Unload() is called (since
// some plugins crash if unloaded).
void PreventLibraryUnload();
// Indicates whether plugin unload can be deferred.
void set_defer_unload(bool defer_unload) {
defer_unload_ = defer_unload;
// protected for testability.
friend class base::RefCounted<PluginLib>;
// Creates a new PluginLib.
explicit PluginLib(const WebPluginInfo& info);
virtual ~PluginLib();
// Attempts to load the plugin from the library.
// Returns true if it is a legitimate plugin, false otherwise
bool Load();
// Unloads the plugin library.
void Unload();
// Shutdown the plugin library.
void Shutdown();
WebPluginInfo web_plugin_info_; // Supported mime types, description
base::NativeLibrary library_; // The opened library reference.
NPPluginFuncs plugin_funcs_; // The struct of plugin side functions.
bool initialized_; // Is the plugin initialized?
NPSavedData *saved_data_; // Persisted plugin info for NPAPI.
int instance_count_; // Count of plugins in use.
bool skip_unload_; // True if library_ should not be unloaded.
// Function pointers to entry points into the plugin.
PluginEntryPoints entry_points_;
// Set to true if unloading of the plugin dll is to be deferred.
bool defer_unload_;
} // namespace content