Updating trunk VERSION from 2139.0 to 2140.0
[chromium-blink-merge.git] / chrome / common / chrome_content_client.cc
blobf26d3b9bab2dee4523914d88064bdda5001b3bad
1 // Copyright (c) 2012 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.
5 #include "chrome/common/chrome_content_client.h"
7 #include "base/command_line.h"
8 #include "base/debug/crash_logging.h"
9 #include "base/files/file_util.h"
10 #include "base/path_service.h"
11 #include "base/strings/string16.h"
12 #include "base/strings/string_number_conversions.h"
13 #include "base/strings/string_split.h"
14 #include "base/strings/string_util.h"
15 #include "base/strings/stringprintf.h"
16 #include "base/strings/utf_string_conversions.h"
17 #include "build/build_config.h"
18 #include "chrome/common/child_process_logging.h"
19 #include "chrome/common/chrome_paths.h"
20 #include "chrome/common/chrome_switches.h"
21 #include "chrome/common/chrome_version_info.h"
22 #include "chrome/common/crash_keys.h"
23 #include "chrome/common/render_messages.h"
24 #include "chrome/common/url_constants.h"
25 #include "chrome/grit/common_resources.h"
26 #include "components/dom_distiller/core/url_constants.h"
27 #include "content/public/common/content_constants.h"
28 #include "content/public/common/content_switches.h"
29 #include "content/public/common/pepper_plugin_info.h"
30 #include "content/public/common/url_constants.h"
31 #include "content/public/common/user_agent.h"
32 #include "extensions/common/constants.h"
33 #include "gpu/config/gpu_info.h"
34 #include "net/http/http_util.h"
35 #include "ui/base/l10n/l10n_util.h"
36 #include "ui/base/layout.h"
37 #include "ui/base/resource/resource_bundle.h"
39 #include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.
41 #if defined(OS_WIN)
42 #include "base/win/registry.h"
43 #include "base/win/windows_version.h"
44 #elif defined(OS_MACOSX)
45 #include "components/nacl/common/nacl_sandbox_type_mac.h"
46 #endif
48 #if !defined(DISABLE_NACL)
49 #include "components/nacl/common/nacl_constants.h"
50 #include "components/nacl/common/nacl_process_type.h"
51 #include "ppapi/native_client/src/trusted/plugin/ppapi_entrypoints.h"
52 #endif
54 #if defined(ENABLE_PLUGINS)
55 #include "chrome/common/pepper_flash.h"
56 #include "flapper_version.h" // In SHARED_INTERMEDIATE_DIR.
57 #include "ppapi/shared_impl/ppapi_permissions.h"
58 #endif
60 #if defined(ENABLE_REMOTING)
61 #include "remoting/client/plugin/pepper_entrypoints.h"
62 #endif
64 #if defined(WIDEVINE_CDM_AVAILABLE) && defined(ENABLE_PEPPER_CDMS) && \
65 !defined(WIDEVINE_CDM_IS_COMPONENT)
66 #include "chrome/common/widevine_cdm_constants.h"
67 #endif
69 namespace {
71 #if defined(ENABLE_PLUGINS)
72 const char kPDFPluginMimeType[] = "application/pdf";
73 const char kPDFPluginExtension[] = "pdf";
74 const char kPDFPluginDescription[] = "Portable Document Format";
75 const char kPDFPluginPrintPreviewMimeType[] =
76 "application/x-google-chrome-print-preview-pdf";
77 const char kPDFPluginOutOfProcessMimeType[] =
78 "application/x-google-chrome-pdf";
79 const uint32 kPDFPluginPermissions = ppapi::PERMISSION_PRIVATE |
80 ppapi::PERMISSION_DEV;
82 const char kO1DPluginName[] = "Google Talk Plugin Video Renderer";
83 const char kO1DPluginMimeType[] ="application/o1d";
84 const char kO1DPluginExtension[] = "";
85 const char kO1DPluginDescription[] = "Google Talk Plugin Video Renderer";
86 const uint32 kO1DPluginPermissions = ppapi::PERMISSION_PRIVATE |
87 ppapi::PERMISSION_DEV;
89 const char kEffectsPluginName[] = "Google Talk Effects Plugin";
90 const char kEffectsPluginMimeType[] ="application/x-ppapi-hangouts-effects";
91 const char kEffectsPluginExtension[] = "";
92 const char kEffectsPluginDescription[] = "Google Talk Effects Plugin";
93 const uint32 kEffectsPluginPermissions = ppapi::PERMISSION_PRIVATE |
94 ppapi::PERMISSION_DEV;
96 const char kGTalkPluginName[] = "Google Talk Plugin";
97 const char kGTalkPluginMimeType[] ="application/googletalk";
98 const char kGTalkPluginExtension[] = ".googletalk";
99 const char kGTalkPluginDescription[] = "Google Talk Plugin";
100 const uint32 kGTalkPluginPermissions = ppapi::PERMISSION_PRIVATE |
101 ppapi::PERMISSION_DEV;
103 #if defined(ENABLE_REMOTING)
104 #if defined(GOOGLE_CHROME_BUILD)
105 const char kRemotingViewerPluginName[] = "Chrome Remote Desktop Viewer";
106 #else
107 const char kRemotingViewerPluginName[] = "Chromoting Viewer";
108 #endif // defined(GOOGLE_CHROME_BUILD)
109 const char kRemotingViewerPluginDescription[] =
110 "This plugin allows you to securely access other computers that have been "
111 "shared with you. To use this plugin you must first install the "
112 "<a href=\"https://chrome.google.com/remotedesktop\">"
113 "Chrome Remote Desktop</a> webapp.";
114 // Use a consistent MIME-type regardless of branding.
115 const char kRemotingViewerPluginMimeType[] =
116 "application/vnd.chromium.remoting-viewer";
117 const char kRemotingViewerPluginMimeExtension[] = "";
118 const char kRemotingViewerPluginMimeDescription[] = "";
119 const uint32 kRemotingViewerPluginPermissions = ppapi::PERMISSION_PRIVATE |
120 ppapi::PERMISSION_DEV;
121 #endif // defined(ENABLE_REMOTING)
123 // Appends the known built-in plugins to the given vector. Some built-in
124 // plugins are "internal" which means they are compiled into the Chrome binary,
125 // and some are extra shared libraries distributed with the browser (these are
126 // not marked internal, aside from being automatically registered, they're just
127 // regular plugins).
128 void ComputeBuiltInPlugins(std::vector<content::PepperPluginInfo>* plugins) {
129 // PDF.
131 // Once we're sandboxed, we can't know if the PDF plugin is available or not;
132 // but (on Linux) this function is always called once before we're sandboxed.
133 // So the first time through test if the file is available and then skip the
134 // check on subsequent calls if yes.
135 static bool skip_pdf_file_check = false;
136 base::FilePath path;
137 if (PathService::Get(chrome::FILE_PDF_PLUGIN, &path)) {
138 if (skip_pdf_file_check || base::PathExists(path)) {
139 content::PepperPluginInfo pdf;
140 pdf.path = path;
141 pdf.name = ChromeContentClient::kPDFPluginName;
142 if (CommandLine::ForCurrentProcess()->HasSwitch(
143 switches::kOutOfProcessPdf)) {
144 pdf.is_out_of_process = true;
145 content::WebPluginMimeType pdf_mime_type(kPDFPluginOutOfProcessMimeType,
146 kPDFPluginExtension,
147 kPDFPluginDescription);
148 pdf.mime_types.push_back(pdf_mime_type);
149 // TODO(raymes): Make print preview work with out of process PDF.
150 } else {
151 content::WebPluginMimeType pdf_mime_type(kPDFPluginMimeType,
152 kPDFPluginExtension,
153 kPDFPluginDescription);
154 content::WebPluginMimeType print_preview_pdf_mime_type(
155 kPDFPluginPrintPreviewMimeType,
156 kPDFPluginExtension,
157 kPDFPluginDescription);
158 pdf.mime_types.push_back(pdf_mime_type);
159 pdf.mime_types.push_back(print_preview_pdf_mime_type);
161 pdf.permissions = kPDFPluginPermissions;
162 plugins->push_back(pdf);
164 skip_pdf_file_check = true;
168 #if !defined(DISABLE_NACL)
169 // Handle Native Client just like the PDF plugin. This means that it is
170 // enabled by default for the non-portable case. This allows apps installed
171 // from the Chrome Web Store to use NaCl even if the command line switch
172 // isn't set. For other uses of NaCl we check for the command line switch.
173 if (PathService::Get(chrome::FILE_NACL_PLUGIN, &path)) {
174 content::PepperPluginInfo nacl;
175 // The nacl plugin is now built into the Chromium binary.
176 nacl.is_internal = true;
177 nacl.path = path;
178 nacl.name = nacl::kNaClPluginName;
179 content::WebPluginMimeType nacl_mime_type(nacl::kNaClPluginMimeType,
180 nacl::kNaClPluginExtension,
181 nacl::kNaClPluginDescription);
182 nacl.mime_types.push_back(nacl_mime_type);
183 content::WebPluginMimeType pnacl_mime_type(nacl::kPnaclPluginMimeType,
184 nacl::kPnaclPluginExtension,
185 nacl::kPnaclPluginDescription);
186 nacl.mime_types.push_back(pnacl_mime_type);
187 nacl.internal_entry_points.get_interface = nacl_plugin::PPP_GetInterface;
188 nacl.internal_entry_points.initialize_module =
189 nacl_plugin::PPP_InitializeModule;
190 nacl.internal_entry_points.shutdown_module =
191 nacl_plugin::PPP_ShutdownModule;
192 nacl.permissions = ppapi::PERMISSION_PRIVATE | ppapi::PERMISSION_DEV;
193 plugins->push_back(nacl);
195 #endif // !defined(DISABLE_NACL)
197 static bool skip_o1d_file_check = false;
198 if (PathService::Get(chrome::FILE_O1D_PLUGIN, &path)) {
199 if (skip_o1d_file_check || base::PathExists(path)) {
200 content::PepperPluginInfo o1d;
201 o1d.path = path;
202 o1d.name = kO1DPluginName;
203 o1d.is_out_of_process = true;
204 o1d.is_sandboxed = false;
205 o1d.permissions = kO1DPluginPermissions;
206 content::WebPluginMimeType o1d_mime_type(kO1DPluginMimeType,
207 kO1DPluginExtension,
208 kO1DPluginDescription);
209 o1d.mime_types.push_back(o1d_mime_type);
210 plugins->push_back(o1d);
212 skip_o1d_file_check = true;
216 // TODO(vrk): Remove this when NaCl effects plugin replaces the ppapi effects
217 // plugin.
218 static bool skip_effects_file_check = false;
219 if (PathService::Get(chrome::FILE_EFFECTS_PLUGIN, &path)) {
220 if (skip_effects_file_check || base::PathExists(path)) {
221 content::PepperPluginInfo effects;
222 effects.path = path;
223 effects.name = kEffectsPluginName;
224 effects.is_out_of_process = true;
225 effects.is_sandboxed = true;
226 effects.permissions = kEffectsPluginPermissions;
227 content::WebPluginMimeType effects_mime_type(kEffectsPluginMimeType,
228 kEffectsPluginExtension,
229 kEffectsPluginDescription);
230 effects.mime_types.push_back(effects_mime_type);
231 plugins->push_back(effects);
233 skip_effects_file_check = true;
237 static bool skip_gtalk_file_check = false;
238 if (PathService::Get(chrome::FILE_GTALK_PLUGIN, &path)) {
239 if (skip_gtalk_file_check || base::PathExists(path)) {
240 content::PepperPluginInfo gtalk;
241 gtalk.path = path;
242 gtalk.name = kGTalkPluginName;
243 gtalk.is_out_of_process = true;
244 gtalk.is_sandboxed = false;
245 gtalk.permissions = kGTalkPluginPermissions;
246 content::WebPluginMimeType gtalk_mime_type(kGTalkPluginMimeType,
247 kGTalkPluginExtension,
248 kGTalkPluginDescription);
249 gtalk.mime_types.push_back(gtalk_mime_type);
250 plugins->push_back(gtalk);
252 skip_gtalk_file_check = true;
256 #if defined(WIDEVINE_CDM_AVAILABLE) && defined(ENABLE_PEPPER_CDMS) && \
257 !defined(WIDEVINE_CDM_IS_COMPONENT)
258 static bool skip_widevine_cdm_file_check = false;
259 if (PathService::Get(chrome::FILE_WIDEVINE_CDM_ADAPTER, &path)) {
260 if (skip_widevine_cdm_file_check || base::PathExists(path)) {
261 content::PepperPluginInfo widevine_cdm;
262 widevine_cdm.is_out_of_process = true;
263 widevine_cdm.path = path;
264 widevine_cdm.name = kWidevineCdmDisplayName;
265 widevine_cdm.description = kWidevineCdmDescription;
266 widevine_cdm.version = WIDEVINE_CDM_VERSION_STRING;
267 content::WebPluginMimeType widevine_cdm_mime_type(
268 kWidevineCdmPluginMimeType,
269 kWidevineCdmPluginExtension,
270 kWidevineCdmPluginMimeTypeDescription);
272 // Add the supported codecs as if they came from the component manifest.
273 std::vector<std::string> codecs;
274 codecs.push_back(kCdmSupportedCodecVorbis);
275 codecs.push_back(kCdmSupportedCodecVp8);
276 codecs.push_back(kCdmSupportedCodecVp9);
277 #if defined(USE_PROPRIETARY_CODECS)
278 // TODO(ddorwin): Rename these macros to reflect their real meaning: whether the
279 // CDM Chrome was built [and shipped] with support these types.
280 #if defined(WIDEVINE_CDM_AAC_SUPPORT_AVAILABLE)
281 codecs.push_back(kCdmSupportedCodecAac);
282 #endif
283 #if defined(WIDEVINE_CDM_AVC1_SUPPORT_AVAILABLE)
284 codecs.push_back(kCdmSupportedCodecAvc1);
285 #endif
286 #endif // defined(USE_PROPRIETARY_CODECS)
287 std::string codec_string =
288 JoinString(codecs, kCdmSupportedCodecsValueDelimiter);
289 widevine_cdm_mime_type.additional_param_names.push_back(
290 base::ASCIIToUTF16(kCdmSupportedCodecsParamName));
291 widevine_cdm_mime_type.additional_param_values.push_back(
292 base::ASCIIToUTF16(codec_string));
294 widevine_cdm.mime_types.push_back(widevine_cdm_mime_type);
295 widevine_cdm.permissions = kWidevineCdmPluginPermissions;
296 plugins->push_back(widevine_cdm);
298 skip_widevine_cdm_file_check = true;
301 #endif // defined(WIDEVINE_CDM_AVAILABLE) && defined(ENABLE_PEPPER_CDMS) &&
302 // !defined(WIDEVINE_CDM_IS_COMPONENT)
304 // The Remoting Viewer plugin is built-in.
305 #if defined(ENABLE_REMOTING)
306 content::PepperPluginInfo info;
307 info.is_internal = true;
308 info.is_out_of_process = true;
309 info.name = kRemotingViewerPluginName;
310 info.description = kRemotingViewerPluginDescription;
311 info.path = base::FilePath::FromUTF8Unsafe(
312 ChromeContentClient::kRemotingViewerPluginPath);
313 content::WebPluginMimeType remoting_mime_type(
314 kRemotingViewerPluginMimeType,
315 kRemotingViewerPluginMimeExtension,
316 kRemotingViewerPluginMimeDescription);
317 info.mime_types.push_back(remoting_mime_type);
318 info.internal_entry_points.get_interface = remoting::PPP_GetInterface;
319 info.internal_entry_points.initialize_module =
320 remoting::PPP_InitializeModule;
321 info.internal_entry_points.shutdown_module = remoting::PPP_ShutdownModule;
322 info.permissions = kRemotingViewerPluginPermissions;
324 plugins->push_back(info);
325 #endif
328 content::PepperPluginInfo CreatePepperFlashInfo(const base::FilePath& path,
329 const std::string& version) {
330 content::PepperPluginInfo plugin;
332 plugin.is_out_of_process = true;
333 plugin.name = content::kFlashPluginName;
334 plugin.path = path;
335 plugin.permissions = kPepperFlashPermissions;
337 std::vector<std::string> flash_version_numbers;
338 base::SplitString(version, '.', &flash_version_numbers);
339 if (flash_version_numbers.size() < 1)
340 flash_version_numbers.push_back("11");
341 // |SplitString()| puts in an empty string given an empty string. :(
342 else if (flash_version_numbers[0].empty())
343 flash_version_numbers[0] = "11";
344 if (flash_version_numbers.size() < 2)
345 flash_version_numbers.push_back("2");
346 if (flash_version_numbers.size() < 3)
347 flash_version_numbers.push_back("999");
348 if (flash_version_numbers.size() < 4)
349 flash_version_numbers.push_back("999");
350 // E.g., "Shockwave Flash 10.2 r154":
351 plugin.description = plugin.name + " " + flash_version_numbers[0] + "." +
352 flash_version_numbers[1] + " r" + flash_version_numbers[2];
353 plugin.version = JoinString(flash_version_numbers, '.');
354 content::WebPluginMimeType swf_mime_type(content::kFlashPluginSwfMimeType,
355 content::kFlashPluginSwfExtension,
356 content::kFlashPluginSwfDescription);
357 plugin.mime_types.push_back(swf_mime_type);
358 content::WebPluginMimeType spl_mime_type(content::kFlashPluginSplMimeType,
359 content::kFlashPluginSplExtension,
360 content::kFlashPluginSplDescription);
361 plugin.mime_types.push_back(spl_mime_type);
363 return plugin;
366 void AddPepperFlashFromCommandLine(
367 std::vector<content::PepperPluginInfo>* plugins) {
368 const CommandLine::StringType flash_path =
369 CommandLine::ForCurrentProcess()->GetSwitchValueNative(
370 switches::kPpapiFlashPath);
371 if (flash_path.empty())
372 return;
374 // Also get the version from the command-line. Should be something like 11.2
375 // or 11.2.123.45.
376 std::string flash_version =
377 CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
378 switches::kPpapiFlashVersion);
380 plugins->push_back(
381 CreatePepperFlashInfo(base::FilePath(flash_path), flash_version));
384 bool GetBundledPepperFlash(content::PepperPluginInfo* plugin) {
385 #if defined(FLAPPER_AVAILABLE)
386 CommandLine* command_line = CommandLine::ForCurrentProcess();
388 // Ignore bundled Pepper Flash if there is Pepper Flash specified from the
389 // command-line.
390 if (command_line->HasSwitch(switches::kPpapiFlashPath))
391 return false;
393 bool force_disable =
394 command_line->HasSwitch(switches::kDisableBundledPpapiFlash);
395 if (force_disable)
396 return false;
398 base::FilePath flash_path;
399 if (!PathService::Get(chrome::FILE_PEPPER_FLASH_PLUGIN, &flash_path))
400 return false;
402 *plugin = CreatePepperFlashInfo(flash_path, FLAPPER_VERSION_STRING);
403 return true;
404 #else
405 return false;
406 #endif // FLAPPER_AVAILABLE
408 #endif // defined(ENABLE_PLUGINS)
410 std::string GetProduct() {
411 chrome::VersionInfo version_info;
412 return version_info.is_valid() ?
413 version_info.ProductNameAndVersionForUserAgent() : std::string();
416 } // namespace
418 std::string GetUserAgent() {
419 CommandLine* command_line = CommandLine::ForCurrentProcess();
420 if (command_line->HasSwitch(switches::kUserAgent)) {
421 std::string ua = command_line->GetSwitchValueASCII(switches::kUserAgent);
422 if (net::HttpUtil::IsValidHeaderValue(ua))
423 return ua;
424 LOG(WARNING) << "Ignored invalid value for flag --" << switches::kUserAgent;
427 std::string product = GetProduct();
428 #if defined(OS_ANDROID)
429 if (command_line->HasSwitch(switches::kUseMobileUserAgent))
430 product += " Mobile";
431 #endif
432 return content::BuildUserAgentFromProduct(product);
435 void ChromeContentClient::SetActiveURL(const GURL& url) {
436 base::debug::SetCrashKeyValue(crash_keys::kActiveURL,
437 url.possibly_invalid_spec());
440 void ChromeContentClient::SetGpuInfo(const gpu::GPUInfo& gpu_info) {
441 #if !defined(OS_ANDROID)
442 base::debug::SetCrashKeyValue(crash_keys::kGPUVendorID,
443 base::StringPrintf("0x%04x", gpu_info.gpu.vendor_id));
444 base::debug::SetCrashKeyValue(crash_keys::kGPUDeviceID,
445 base::StringPrintf("0x%04x", gpu_info.gpu.device_id));
446 #endif
447 base::debug::SetCrashKeyValue(crash_keys::kGPUDriverVersion,
448 gpu_info.driver_version);
449 base::debug::SetCrashKeyValue(crash_keys::kGPUPixelShaderVersion,
450 gpu_info.pixel_shader_version);
451 base::debug::SetCrashKeyValue(crash_keys::kGPUVertexShaderVersion,
452 gpu_info.vertex_shader_version);
453 #if defined(OS_MACOSX)
454 base::debug::SetCrashKeyValue(crash_keys::kGPUGLVersion, gpu_info.gl_version);
455 #elif defined(OS_POSIX)
456 base::debug::SetCrashKeyValue(crash_keys::kGPUVendor, gpu_info.gl_vendor);
457 base::debug::SetCrashKeyValue(crash_keys::kGPURenderer, gpu_info.gl_renderer);
458 #endif
461 void ChromeContentClient::AddPepperPlugins(
462 std::vector<content::PepperPluginInfo>* plugins) {
463 #if defined(ENABLE_PLUGINS)
464 ComputeBuiltInPlugins(plugins);
465 AddPepperFlashFromCommandLine(plugins);
467 content::PepperPluginInfo plugin;
468 if (GetBundledPepperFlash(&plugin))
469 plugins->push_back(plugin);
470 #endif
473 void ChromeContentClient::AddAdditionalSchemes(
474 std::vector<std::string>* standard_schemes,
475 std::vector<std::string>* savable_schemes) {
476 standard_schemes->push_back(extensions::kExtensionScheme);
477 savable_schemes->push_back(extensions::kExtensionScheme);
478 standard_schemes->push_back(chrome::kChromeNativeScheme);
479 standard_schemes->push_back(extensions::kExtensionResourceScheme);
480 savable_schemes->push_back(extensions::kExtensionResourceScheme);
481 standard_schemes->push_back(chrome::kChromeSearchScheme);
482 savable_schemes->push_back(chrome::kChromeSearchScheme);
483 standard_schemes->push_back(dom_distiller::kDomDistillerScheme);
484 savable_schemes->push_back(dom_distiller::kDomDistillerScheme);
485 #if defined(OS_CHROMEOS)
486 standard_schemes->push_back(chrome::kCrosScheme);
487 #endif
490 std::string ChromeContentClient::GetProduct() const {
491 return ::GetProduct();
494 std::string ChromeContentClient::GetUserAgent() const {
495 return ::GetUserAgent();
498 base::string16 ChromeContentClient::GetLocalizedString(int message_id) const {
499 return l10n_util::GetStringUTF16(message_id);
502 base::StringPiece ChromeContentClient::GetDataResource(
503 int resource_id,
504 ui::ScaleFactor scale_factor) const {
505 return ResourceBundle::GetSharedInstance().GetRawDataResourceForScale(
506 resource_id, scale_factor);
509 base::RefCountedStaticMemory* ChromeContentClient::GetDataResourceBytes(
510 int resource_id) const {
511 return ResourceBundle::GetSharedInstance().LoadDataResourceBytes(resource_id);
514 gfx::Image& ChromeContentClient::GetNativeImageNamed(int resource_id) const {
515 return ResourceBundle::GetSharedInstance().GetNativeImageNamed(resource_id);
518 std::string ChromeContentClient::GetProcessTypeNameInEnglish(int type) {
519 #if !defined(DISABLE_NACL)
520 switch (type) {
521 case PROCESS_TYPE_NACL_LOADER:
522 return "Native Client module";
523 case PROCESS_TYPE_NACL_BROKER:
524 return "Native Client broker";
526 #endif
528 NOTREACHED() << "Unknown child process type!";
529 return "Unknown";
532 #if defined(OS_MACOSX) && !defined(OS_IOS)
533 bool ChromeContentClient::GetSandboxProfileForSandboxType(
534 int sandbox_type,
535 int* sandbox_profile_resource_id) const {
536 DCHECK(sandbox_profile_resource_id);
537 if (sandbox_type == NACL_SANDBOX_TYPE_NACL_LOADER) {
538 *sandbox_profile_resource_id = IDR_NACL_SANDBOX_PROFILE;
539 return true;
541 return false;
543 #endif