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| 1 // Copyright (c) 2011 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 #include <stdio.h> | |
| 6 #include <string.h> | |
| 7 | |
| 8 #include <string> | |
| 9 #include <vector> | |
| 10 | |
| 11 #include "base/at_exit.h" | |
| 12 #include "base/basictypes.h" | |
| 13 #include "base/logging.h" | |
| 14 #include "base/stringize_macros.h" | |
| 15 #include "remoting/host/host_plugin_utils.h" | |
| 16 #include "remoting/host/host_script_object.h" | |
| 17 #include "third_party/npapi/bindings/npapi.h" | |
| 18 #include "third_party/npapi/bindings/npfunctions.h" | |
| 19 #include "third_party/npapi/bindings/npruntime.h" | |
| 20 | |
| 21 // Symbol export is handled with a separate def file on Windows. | |
| 22 #if defined (__GNUC__) && __GNUC__ >= 4 | |
| 23 #define EXPORT __attribute__((visibility("default"))) | |
| 24 #else | |
| 25 #define EXPORT | |
| 26 #endif | |
| 27 | |
| 28 #if defined(OS_WIN) | |
| 29 // TODO(wez): libvpx expects these 64-bit division functions to be provided | |
| 30 // by libgcc.a, which we aren't linked against. These implementations can | |
| 31 // be removed once we have native MSVC libvpx builds for Windows. | |
| 32 extern "C" { | |
| 33 | |
| 34 int64_t __cdecl __divdi3(int64_t a, int64_t b) { | |
| 35 return a / b; | |
| 36 } | |
| 37 uint64_t __cdecl __udivdi3(uint64_t a, uint64_t b) { | |
| 38 return a / b; | |
| 39 } | |
| 40 | |
| 41 } | |
| 42 #endif | |
| 43 | |
| 44 using remoting::g_npnetscape_funcs; | |
| 45 using remoting::HostNPScriptObject; | |
| 46 using remoting::StringFromNPIdentifier; | |
| 47 | |
| 48 namespace { | |
| 49 | |
| 50 base::AtExitManager* g_at_exit_manager = NULL; | |
| 51 | |
| 52 // The name and description are returned by GetValue, but are also | |
| 53 // combined with the MIME type to satisfy GetMIMEDescription, so we | |
| 54 // use macros here to allow that to happen at compile-time. | |
| 55 #define HOST_PLUGIN_NAME "Remoting Host Plugin" | |
| 56 #define HOST_PLUGIN_DESCRIPTION "Remoting Host Plugin" | |
| 57 | |
| 58 // NPAPI plugin implementation for remoting host. | |
| 59 // Documentation for most of the calls in this class can be found here: | |
| 60 // https://developer.mozilla.org/en/Gecko_Plugin_API_Reference/Scripting_plugins | |
| 61 class HostNPPlugin { | |
| 62 public: | |
| 63 // |mode| is the display mode of plug-in. Values: | |
| 64 // NP_EMBED: (1) Instance was created by an EMBED tag and shares the browser | |
| 65 // window with other content. | |
| 66 // NP_FULL: (2) Instance was created by a separate file and is the primary | |
| 67 // content in the window. | |
| 68 HostNPPlugin(NPP instance, uint16 mode) | |
| 69 : instance_(instance), scriptable_object_(NULL) {} | |
| 70 | |
| 71 ~HostNPPlugin() { | |
| 72 if (scriptable_object_) { | |
| 73 g_npnetscape_funcs->releaseobject(scriptable_object_); | |
| 74 scriptable_object_ = NULL; | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 bool Init(int16 argc, char** argn, char** argv, NPSavedData* saved) { | |
| 79 #if defined(OS_MACOSX) | |
| 80 // Use the modern CoreGraphics and Cocoa models when available, since | |
| 81 // QuickDraw and Carbon are deprecated. | |
| 82 // The drawing and event models don't change anything for this plugin, since | |
| 83 // none of the functions affected by the models actually do anything. | |
| 84 // This does however keep the plugin from breaking when Chromium eventually | |
| 85 // drops support for QuickDraw and Carbon, and it also keeps the browser | |
| 86 // from sending Null Events once a second to support old Carbon based | |
| 87 // timers. | |
| 88 // Chromium should always be supporting the newer models. | |
| 89 | |
| 90 // Sanity check to see if Chromium supports the CoreGraphics drawing model. | |
| 91 NPBool supports_core_graphics = false; | |
| 92 NPError err = g_npnetscape_funcs->getvalue(instance_, | |
| 93 NPNVsupportsCoreGraphicsBool, | |
| 94 &supports_core_graphics); | |
| 95 if (err == NPERR_NO_ERROR && supports_core_graphics) { | |
| 96 // Switch to CoreGraphics drawing model. | |
| 97 g_npnetscape_funcs->setvalue(instance_, NPPVpluginDrawingModel, | |
| 98 reinterpret_cast<void*>(NPDrawingModelCoreGraphics)); | |
| 99 } else { | |
| 100 LOG(ERROR) << "No Core Graphics support"; | |
| 101 return false; | |
| 102 } | |
| 103 | |
| 104 // Sanity check to see if Chromium supports the Cocoa event model. | |
| 105 NPBool supports_cocoa = false; | |
| 106 err = g_npnetscape_funcs->getvalue(instance_, NPNVsupportsCocoaBool, | |
| 107 &supports_cocoa); | |
| 108 if (err == NPERR_NO_ERROR && supports_cocoa) { | |
| 109 // Switch to Cocoa event model. | |
| 110 g_npnetscape_funcs->setvalue(instance_, NPPVpluginEventModel, | |
| 111 reinterpret_cast<void*>(NPEventModelCocoa)); | |
| 112 } else { | |
| 113 LOG(ERROR) << "No Cocoa Event Model support"; | |
| 114 return false; | |
| 115 } | |
| 116 #endif // OS_MACOSX | |
| 117 return true; | |
| 118 } | |
| 119 | |
| 120 bool Save(NPSavedData** saved) { | |
| 121 return true; | |
| 122 } | |
| 123 | |
| 124 NPObject* GetScriptableObject() { | |
| 125 if (!scriptable_object_) { | |
| 126 // Must be static. If it is a temporary, objects created by this | |
| 127 // method will fail in weird and wonderful ways later. | |
| 128 static NPClass npc_ref_object = { | |
| 129 NP_CLASS_STRUCT_VERSION, | |
| 130 &Allocate, | |
| 131 &Deallocate, | |
| 132 &Invalidate, | |
| 133 &HasMethod, | |
| 134 &Invoke, | |
| 135 &InvokeDefault, | |
| 136 &HasProperty, | |
| 137 &GetProperty, | |
| 138 &SetProperty, | |
| 139 &RemoveProperty, | |
| 140 &Enumerate, | |
| 141 NULL | |
| 142 }; | |
| 143 scriptable_object_ = g_npnetscape_funcs->createobject(instance_, | |
| 144 &npc_ref_object); | |
| 145 } | |
| 146 return scriptable_object_; | |
| 147 } | |
| 148 | |
| 149 private: | |
| 150 struct ScriptableNPObject : public NPObject { | |
| 151 HostNPScriptObject* scriptable_object; | |
| 152 }; | |
| 153 | |
| 154 static HostNPScriptObject* ScriptableFromObject(NPObject* obj) { | |
| 155 return reinterpret_cast<ScriptableNPObject*>(obj)->scriptable_object; | |
| 156 } | |
| 157 | |
| 158 static NPObject* Allocate(NPP npp, NPClass* aClass) { | |
| 159 VLOG(2) << "static Allocate"; | |
| 160 ScriptableNPObject* object = | |
| 161 reinterpret_cast<ScriptableNPObject*>( | |
| 162 g_npnetscape_funcs->memalloc(sizeof(ScriptableNPObject))); | |
| 163 | |
| 164 object->_class = aClass; | |
| 165 object->referenceCount = 1; | |
| 166 object->scriptable_object = new HostNPScriptObject(npp, object); | |
| 167 if (!object->scriptable_object->Init()) { | |
| 168 Deallocate(object); | |
| 169 object = NULL; | |
| 170 } | |
| 171 return object; | |
| 172 } | |
| 173 | |
| 174 static void Deallocate(NPObject* npobj) { | |
| 175 VLOG(2) << "static Deallocate"; | |
| 176 if (npobj) { | |
| 177 Invalidate(npobj); | |
| 178 g_npnetscape_funcs->memfree(npobj); | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 static void Invalidate(NPObject* npobj) { | |
| 183 if (npobj) { | |
| 184 ScriptableNPObject* object = reinterpret_cast<ScriptableNPObject*>(npobj); | |
| 185 if (object->scriptable_object) { | |
| 186 delete object->scriptable_object; | |
| 187 object->scriptable_object = NULL; | |
| 188 } | |
| 189 } | |
| 190 } | |
| 191 | |
| 192 static bool HasMethod(NPObject* obj, NPIdentifier method_name) { | |
| 193 VLOG(2) << "static HasMethod"; | |
| 194 HostNPScriptObject* scriptable = ScriptableFromObject(obj); | |
| 195 if (!scriptable) return false; | |
| 196 std::string method_name_string = StringFromNPIdentifier(method_name); | |
| 197 if (method_name_string.empty()) | |
| 198 return false; | |
| 199 return scriptable->HasMethod(method_name_string); | |
| 200 } | |
| 201 | |
| 202 static bool InvokeDefault(NPObject* obj, | |
| 203 const NPVariant* args, | |
| 204 uint32_t argCount, | |
| 205 NPVariant* result) { | |
| 206 VLOG(2) << "static InvokeDefault"; | |
| 207 HostNPScriptObject* scriptable = ScriptableFromObject(obj); | |
| 208 if (!scriptable) return false; | |
| 209 return scriptable->InvokeDefault(args, argCount, result); | |
| 210 } | |
| 211 | |
| 212 static bool Invoke(NPObject* obj, | |
| 213 NPIdentifier method_name, | |
| 214 const NPVariant* args, | |
| 215 uint32_t argCount, | |
| 216 NPVariant* result) { | |
| 217 VLOG(2) << "static Invoke"; | |
| 218 HostNPScriptObject* scriptable = ScriptableFromObject(obj); | |
| 219 if (!scriptable) | |
| 220 return false; | |
| 221 std::string method_name_string = StringFromNPIdentifier(method_name); | |
| 222 if (method_name_string.empty()) | |
| 223 return false; | |
| 224 return scriptable->Invoke(method_name_string, args, argCount, result); | |
| 225 } | |
| 226 | |
| 227 static bool HasProperty(NPObject* obj, NPIdentifier property_name) { | |
| 228 VLOG(2) << "static HasProperty"; | |
| 229 HostNPScriptObject* scriptable = ScriptableFromObject(obj); | |
| 230 if (!scriptable) return false; | |
| 231 std::string property_name_string = StringFromNPIdentifier(property_name); | |
| 232 if (property_name_string.empty()) | |
| 233 return false; | |
| 234 return scriptable->HasProperty(property_name_string); | |
| 235 } | |
| 236 | |
| 237 static bool GetProperty(NPObject* obj, | |
| 238 NPIdentifier property_name, | |
| 239 NPVariant* result) { | |
| 240 VLOG(2) << "static GetProperty"; | |
| 241 HostNPScriptObject* scriptable = ScriptableFromObject(obj); | |
| 242 if (!scriptable) return false; | |
| 243 std::string property_name_string = StringFromNPIdentifier(property_name); | |
| 244 if (property_name_string.empty()) | |
| 245 return false; | |
| 246 return scriptable->GetProperty(property_name_string, result); | |
| 247 } | |
| 248 | |
| 249 static bool SetProperty(NPObject* obj, | |
| 250 NPIdentifier property_name, | |
| 251 const NPVariant* value) { | |
| 252 VLOG(2) << "static SetProperty"; | |
| 253 HostNPScriptObject* scriptable = ScriptableFromObject(obj); | |
| 254 if (!scriptable) return false; | |
| 255 std::string property_name_string = StringFromNPIdentifier(property_name); | |
| 256 if (property_name_string.empty()) | |
| 257 return false; | |
| 258 return scriptable->SetProperty(property_name_string, value); | |
| 259 } | |
| 260 | |
| 261 static bool RemoveProperty(NPObject* obj, NPIdentifier property_name) { | |
| 262 VLOG(2) << "static RemoveProperty"; | |
| 263 HostNPScriptObject* scriptable = ScriptableFromObject(obj); | |
| 264 if (!scriptable) return false; | |
| 265 std::string property_name_string = StringFromNPIdentifier(property_name); | |
| 266 if (property_name_string.empty()) | |
| 267 return false; | |
| 268 return scriptable->RemoveProperty(property_name_string); | |
| 269 } | |
| 270 | |
| 271 static bool Enumerate(NPObject* obj, | |
| 272 NPIdentifier** value, | |
| 273 uint32_t* count) { | |
| 274 VLOG(2) << "static Enumerate"; | |
| 275 HostNPScriptObject* scriptable = ScriptableFromObject(obj); | |
| 276 if (!scriptable) return false; | |
| 277 std::vector<std::string> values; | |
| 278 bool is_good = scriptable->Enumerate(&values); | |
| 279 if (is_good) { | |
| 280 *count = values.size(); | |
| 281 *value = reinterpret_cast<NPIdentifier*>( | |
| 282 g_npnetscape_funcs->memalloc(sizeof(NPIdentifier) * (*count))); | |
| 283 for (uint32_t i = 0; i < *count; ++i) { | |
| 284 (*value)[i] = | |
| 285 g_npnetscape_funcs->getstringidentifier(values[i].c_str()); | |
| 286 } | |
| 287 } | |
| 288 return is_good; | |
| 289 } | |
| 290 | |
| 291 NPP instance_; | |
| 292 NPObject* scriptable_object_; | |
| 293 }; | |
| 294 | |
| 295 // Utility functions to map NPAPI Entry Points to C++ Objects. | |
| 296 HostNPPlugin* PluginFromInstance(NPP instance) { | |
| 297 return reinterpret_cast<HostNPPlugin*>(instance->pdata); | |
| 298 } | |
| 299 | |
| 300 NPError CreatePlugin(NPMIMEType pluginType, | |
| 301 NPP instance, | |
| 302 uint16 mode, | |
| 303 int16 argc, | |
| 304 char** argn, | |
| 305 char** argv, | |
| 306 NPSavedData* saved) { | |
| 307 VLOG(2) << "CreatePlugin"; | |
| 308 HostNPPlugin* plugin = new HostNPPlugin(instance, mode); | |
| 309 instance->pdata = plugin; | |
| 310 if (!plugin->Init(argc, argn, argv, saved)) { | |
| 311 delete plugin; | |
| 312 instance->pdata = NULL; | |
| 313 return NPERR_INVALID_PLUGIN_ERROR; | |
| 314 } else { | |
| 315 return NPERR_NO_ERROR; | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 NPError DestroyPlugin(NPP instance, | |
| 320 NPSavedData** save) { | |
| 321 VLOG(2) << "DestroyPlugin"; | |
| 322 HostNPPlugin* plugin = PluginFromInstance(instance); | |
| 323 if (plugin) { | |
| 324 plugin->Save(save); | |
| 325 delete plugin; | |
| 326 instance->pdata = NULL; | |
| 327 return NPERR_NO_ERROR; | |
| 328 } else { | |
| 329 return NPERR_INVALID_PLUGIN_ERROR; | |
| 330 } | |
| 331 } | |
| 332 | |
| 333 NPError GetValue(NPP instance, NPPVariable variable, void* value) { | |
| 334 switch(variable) { | |
| 335 default: | |
| 336 VLOG(2) << "GetValue - default " << variable; | |
| 337 return NPERR_GENERIC_ERROR; | |
| 338 case NPPVpluginNameString: | |
| 339 VLOG(2) << "GetValue - name string"; | |
| 340 *reinterpret_cast<const char**>(value) = HOST_PLUGIN_NAME; | |
| 341 break; | |
| 342 case NPPVpluginDescriptionString: | |
| 343 VLOG(2) << "GetValue - description string"; | |
| 344 *reinterpret_cast<const char**>(value) = HOST_PLUGIN_DESCRIPTION; | |
| 345 break; | |
| 346 case NPPVpluginNeedsXEmbed: | |
| 347 VLOG(2) << "GetValue - NeedsXEmbed"; | |
| 348 *(static_cast<NPBool*>(value)) = true; | |
| 349 break; | |
| 350 case NPPVpluginScriptableNPObject: | |
| 351 VLOG(2) << "GetValue - scriptable object"; | |
| 352 HostNPPlugin* plugin = PluginFromInstance(instance); | |
| 353 if (!plugin) | |
| 354 return NPERR_INVALID_PLUGIN_ERROR; | |
| 355 NPObject* scriptable_object = plugin->GetScriptableObject(); | |
| 356 g_npnetscape_funcs->retainobject(scriptable_object); | |
| 357 *reinterpret_cast<NPObject**>(value) = scriptable_object; | |
| 358 break; | |
| 359 } | |
| 360 return NPERR_NO_ERROR; | |
| 361 } | |
| 362 | |
| 363 NPError HandleEvent(NPP instance, void* ev) { | |
| 364 VLOG(2) << "HandleEvent"; | |
| 365 return NPERR_NO_ERROR; | |
| 366 } | |
| 367 | |
| 368 NPError SetWindow(NPP instance, NPWindow* pNPWindow) { | |
| 369 VLOG(2) << "SetWindow"; | |
| 370 return NPERR_NO_ERROR; | |
| 371 } | |
| 372 | |
| 373 } // namespace | |
| 374 | |
| 375 #if defined(OS_WIN) | |
| 376 HMODULE g_hModule = NULL; | |
| 377 | |
| 378 BOOL APIENTRY DllMain(HMODULE hModule, DWORD dwReason, LPVOID lpReserved) { | |
| 379 switch (dwReason) { | |
| 380 case DLL_PROCESS_ATTACH: | |
| 381 g_hModule = hModule; | |
| 382 DisableThreadLibraryCalls(hModule); | |
| 383 break; | |
| 384 case DLL_PROCESS_DETACH: | |
| 385 case DLL_THREAD_ATTACH: | |
| 386 case DLL_THREAD_DETACH: | |
| 387 break; | |
| 388 } | |
| 389 return TRUE; | |
| 390 } | |
| 391 #endif | |
| 392 | |
| 393 // The actual required NPAPI Entry points | |
| 394 | |
| 395 extern "C" { | |
| 396 | |
| 397 EXPORT NPError API_CALL NP_GetEntryPoints(NPPluginFuncs* nppfuncs) { | |
| 398 VLOG(2) << "NP_GetEntryPoints"; | |
| 399 nppfuncs->version = (NP_VERSION_MAJOR << 8) | NP_VERSION_MINOR; | |
| 400 nppfuncs->newp = &CreatePlugin; | |
| 401 nppfuncs->destroy = &DestroyPlugin; | |
| 402 nppfuncs->getvalue = &GetValue; | |
| 403 nppfuncs->event = &HandleEvent; | |
| 404 nppfuncs->setwindow = &SetWindow; | |
| 405 | |
| 406 return NPERR_NO_ERROR; | |
| 407 } | |
| 408 | |
| 409 EXPORT NPError API_CALL NP_Initialize(NPNetscapeFuncs* npnetscape_funcs | |
| 410 #if defined(OS_POSIX) && !defined(OS_MACOSX) | |
| 411 , NPPluginFuncs* nppfuncs | |
| 412 #endif | |
| 413 ) { | |
| 414 VLOG(2) << "NP_Initialize"; | |
| 415 if (g_at_exit_manager) | |
| 416 return NPERR_MODULE_LOAD_FAILED_ERROR; | |
| 417 | |
| 418 if(npnetscape_funcs == NULL) | |
| 419 return NPERR_INVALID_FUNCTABLE_ERROR; | |
| 420 | |
| 421 if(((npnetscape_funcs->version & 0xff00) >> 8) > NP_VERSION_MAJOR) | |
| 422 return NPERR_INCOMPATIBLE_VERSION_ERROR; | |
| 423 | |
| 424 g_at_exit_manager = new base::AtExitManager; | |
| 425 g_npnetscape_funcs = npnetscape_funcs; | |
| 426 #if defined(OS_POSIX) && !defined(OS_MACOSX) | |
| 427 NP_GetEntryPoints(nppfuncs); | |
| 428 #endif | |
| 429 return NPERR_NO_ERROR; | |
| 430 } | |
| 431 | |
| 432 EXPORT NPError API_CALL NP_Shutdown() { | |
| 433 VLOG(2) << "NP_Shutdown"; | |
| 434 delete g_at_exit_manager; | |
| 435 g_at_exit_manager = NULL; | |
| 436 return NPERR_NO_ERROR; | |
| 437 } | |
| 438 | |
| 439 #if defined(OS_POSIX) && !defined(OS_MACOSX) | |
| 440 EXPORT const char* API_CALL NP_GetMIMEDescription(void) { | |
| 441 VLOG(2) << "NP_GetMIMEDescription"; | |
| 442 return STRINGIZE(HOST_PLUGIN_MIME_TYPE) ":" | |
| 443 HOST_PLUGIN_NAME ":" | |
| 444 HOST_PLUGIN_DESCRIPTION; | |
| 445 } | |
| 446 | |
| 447 EXPORT NPError API_CALL NP_GetValue(void* npp, | |
| 448 NPPVariable variable, | |
| 449 void* value) { | |
| 450 return GetValue((NPP)npp, variable, value); | |
| 451 } | |
| 452 #endif | |
| 453 | |
| 454 } // extern "C" | |
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Chromium Code Reviews
Issue 7216018:
Move the Remoting Host plugin into its own sub-directory. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src