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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 // | |
| 5 // A proxy for NPObject that sends all calls to the object to an NPObjectStub | |
| 6 // running in a different process. | |
| 7 | |
| 8 #ifndef CHROME_PLUGIN_NPOBJECT_PROXY_H_ | |
| 9 #define CHROME_PLUGIN_NPOBJECT_PROXY_H_ | |
| 10 #pragma once | |
| 11 | |
| 12 #include "base/ref_counted.h" | |
| 13 #include "chrome/plugin/npobject_base.h" | |
| 14 #include "googleurl/src/gurl.h" | |
| 15 #include "ipc/ipc_channel.h" | |
| 16 #include "third_party/npapi/bindings/npruntime.h" | |
| 17 #include "ui/gfx/native_widget_types.h" | |
| 18 | |
| 19 class PluginChannelBase; | |
| 20 struct NPObject; | |
| 21 | |
| 22 // When running a plugin in a different process from the renderer, we need to | |
| 23 // proxy calls to NPObjects across process boundaries. This happens both ways, | |
| 24 // as a plugin can get an NPObject for the window, and a page can get an | |
| 25 // NPObject for the plugin. In the process that interacts with the NPobject we | |
| 26 // give it an NPObjectProxy instead. All calls to it are sent across an IPC | |
| 27 // channel (specifically, a PluginChannelBase). The NPObjectStub on the other | |
| 28 // side translates the IPC messages into calls to the actual NPObject, and | |
| 29 // returns the marshalled result. | |
| 30 class NPObjectProxy : public IPC::Channel::Listener, | |
| 31 public IPC::Message::Sender, | |
| 32 public NPObjectBase { | |
| 33 public: | |
| 34 ~NPObjectProxy(); | |
| 35 | |
| 36 static NPObject* Create(PluginChannelBase* channel, | |
| 37 int route_id, | |
| 38 gfx::NativeViewId containing_window, | |
| 39 const GURL& page_url); | |
| 40 | |
| 41 // IPC::Message::Sender implementation: | |
| 42 virtual bool Send(IPC::Message* msg); | |
| 43 int route_id() { return route_id_; } | |
| 44 PluginChannelBase* channel() { return channel_; } | |
| 45 | |
| 46 // The next 9 functions are called on NPObjects from the plugin and browser. | |
| 47 static bool NPHasMethod(NPObject *obj, | |
| 48 NPIdentifier name); | |
| 49 static bool NPInvoke(NPObject *obj, | |
| 50 NPIdentifier name, | |
| 51 const NPVariant *args, | |
| 52 uint32_t arg_count, | |
| 53 NPVariant *result); | |
| 54 static bool NPInvokeDefault(NPObject *npobj, | |
| 55 const NPVariant *args, | |
| 56 uint32_t arg_count, | |
| 57 NPVariant *result); | |
| 58 static bool NPHasProperty(NPObject *obj, | |
| 59 NPIdentifier name); | |
| 60 static bool NPGetProperty(NPObject *obj, | |
| 61 NPIdentifier name, | |
| 62 NPVariant *result); | |
| 63 static bool NPSetProperty(NPObject *obj, | |
| 64 NPIdentifier name, | |
| 65 const NPVariant *value); | |
| 66 static bool NPRemoveProperty(NPObject *obj, | |
| 67 NPIdentifier name); | |
| 68 static bool NPNEnumerate(NPObject *obj, | |
| 69 NPIdentifier **value, | |
| 70 uint32_t *count); | |
| 71 static bool NPNConstruct(NPObject *npobj, | |
| 72 const NPVariant *args, | |
| 73 uint32_t arg_count, | |
| 74 NPVariant *result); | |
| 75 | |
| 76 // The next two functions are only called on NPObjects from the browser. | |
| 77 static bool NPNEvaluate(NPP npp, | |
| 78 NPObject *obj, | |
| 79 NPString *script, | |
| 80 NPVariant *result); | |
| 81 | |
| 82 static bool NPInvokePrivate(NPP npp, | |
| 83 NPObject *obj, | |
| 84 bool is_default, | |
| 85 NPIdentifier name, | |
| 86 const NPVariant *args, | |
| 87 uint32_t arg_count, | |
| 88 NPVariant *result); | |
| 89 | |
| 90 static NPObjectProxy* GetProxy(NPObject* object); | |
| 91 static const NPClass* npclass() { return &npclass_proxy_; } | |
| 92 | |
| 93 // NPObjectBase implementation. | |
| 94 virtual NPObject* GetUnderlyingNPObject(); | |
| 95 | |
| 96 virtual IPC::Channel::Listener* GetChannelListener(); | |
| 97 | |
| 98 private: | |
| 99 NPObjectProxy(PluginChannelBase* channel, | |
| 100 int route_id, | |
| 101 gfx::NativeViewId containing_window, | |
| 102 const GURL& page_url); | |
| 103 | |
| 104 // IPC::Channel::Listener implementation: | |
| 105 virtual bool OnMessageReceived(const IPC::Message& msg); | |
| 106 virtual void OnChannelError(); | |
| 107 | |
| 108 static NPObject* NPAllocate(NPP, NPClass*); | |
| 109 static void NPDeallocate(NPObject* npObj); | |
| 110 | |
| 111 // This function is only caled on NPObjects from the plugin. | |
| 112 static void NPPInvalidate(NPObject *obj); | |
| 113 static NPClass npclass_proxy_; | |
| 114 | |
| 115 scoped_refptr<PluginChannelBase> channel_; | |
| 116 int route_id_; | |
| 117 gfx::NativeViewId containing_window_; | |
| 118 | |
| 119 // The url of the main frame hosting the plugin. | |
| 120 GURL page_url_; | |
| 121 }; | |
| 122 | |
| 123 #endif // CHROME_PLUGIN_NPOBJECT_PROXY_H_ | |
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