Source/WebKit2/UIProcess/Plugins/win/PluginInfoStoreWin.cpp - platform/external/webkit - Git at Google

 /*
  * Copyright (C) 2010 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. 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.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
  */

 #include "config.h"
 #include "PluginInfoStore.h"

 #include "NetscapePluginModule.h"
 #include <WebCore/FileSystem.h>
 #include <WebCore/PathWalker.h>
 #include <shlwapi.h>

 using namespace WebCore;

 namespace WebKit {

 static inline Vector<int> parseVersionString(const String& versionString)
 {
     Vector<int> version;

     unsigned startPos = 0;
     unsigned endPos;

     while (startPos < versionString.length()) {
         for (endPos = startPos; endPos < versionString.length(); ++endPos)
             if (versionString[endPos] == '.' || versionString[endPos] == '_')
                 break;

         int versionComponent = versionString.substring(startPos, endPos - startPos).toInt();
         version.append(versionComponent);

         startPos = endPos + 1;
     }

     return version;
 }

 // This returns whether versionA is higher than versionB
 static inline bool compareVersions(const Vector<int>& versionA, const Vector<int>& versionB)
 {
     for (unsigned i = 0; i < versionA.size(); i++) {
         if (i >= versionB.size())
             return true;

         if (versionA[i] > versionB[i])
             return true;
         else if (versionA[i] < versionB[i])
             return false;
     }

     // If we come here, the versions are either the same or versionB has an extra component, just return false
     return false;
 }

 static inline String safariPluginsDirectory()
 {
     static String pluginsDirectory;
     static bool cachedPluginDirectory = false;

     if (!cachedPluginDirectory) {
         cachedPluginDirectory = true;

         WCHAR moduleFileNameStr[MAX_PATH];
         int moduleFileNameLen = ::GetModuleFileNameW(0, moduleFileNameStr, WTF_ARRAY_LENGTH(moduleFileNameStr));

         if (!moduleFileNameLen || moduleFileNameLen == WTF_ARRAY_LENGTH(moduleFileNameStr))
             return pluginsDirectory;

         if (!::PathRemoveFileSpecW(moduleFileNameStr))
             return pluginsDirectory;

         pluginsDirectory = String(moduleFileNameStr) + "\\Plugins";
     }

     return pluginsDirectory;
 }

 static inline void addMozillaPluginDirectories(Vector<String>& directories)
 {
     // Enumerate all Mozilla plugin directories in the registry
     HKEY key;
     LONG result = ::RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"Software\\Mozilla", 0, KEY_READ, &key);
     if (result != ERROR_SUCCESS)
         return;

     WCHAR name[128];
     FILETIME lastModified;

     // Enumerate subkeys
     for (int i = 0;; i++) {
         DWORD nameLen = WTF_ARRAY_LENGTH(name);
         result = ::RegEnumKeyExW(key, i, name, &nameLen, 0, 0, 0, &lastModified);

         if (result != ERROR_SUCCESS)
             break;

         String extensionsPath = String(name, nameLen) + "\\Extensions";
         HKEY extensionsKey;

         // Try opening the key
         result = ::RegOpenKeyExW(key, extensionsPath.charactersWithNullTermination(), 0, KEY_READ, &extensionsKey);

         if (result == ERROR_SUCCESS) {
             // Now get the plugins directory
             WCHAR pluginsDirectoryStr[MAX_PATH];
             DWORD pluginsDirectorySize = sizeof(pluginsDirectoryStr);
             DWORD type;

             result = ::RegQueryValueExW(extensionsKey, L"Plugins", 0, &type, reinterpret_cast<LPBYTE>(&pluginsDirectoryStr), &pluginsDirectorySize);

             if (result == ERROR_SUCCESS && type == REG_SZ)
                 directories.append(String(pluginsDirectoryStr, pluginsDirectorySize / sizeof(WCHAR) - 1));

             ::RegCloseKey(extensionsKey);
         }
     }

     ::RegCloseKey(key);
 }

 static inline void addWindowsMediaPlayerPluginDirectory(Vector<String>& directories)
 {
     // The new WMP Firefox plugin is installed in \PFiles\Plugins if it can't find any Firefox installs
     WCHAR pluginDirectoryStr[MAX_PATH + 1];
     DWORD pluginDirectorySize = ::ExpandEnvironmentStringsW(L"%SYSTEMDRIVE%\\PFiles\\Plugins", pluginDirectoryStr, WTF_ARRAY_LENGTH(pluginDirectoryStr));

     if (pluginDirectorySize > 0 && pluginDirectorySize <= WTF_ARRAY_LENGTH(pluginDirectoryStr))
         directories.append(String(pluginDirectoryStr, pluginDirectorySize - 1));

     DWORD type;
     WCHAR installationDirectoryStr[MAX_PATH];
     DWORD installationDirectorySize = sizeof(installationDirectoryStr);

     HRESULT result = ::SHGetValueW(HKEY_LOCAL_MACHINE, L"Software\\Microsoft\\MediaPlayer", L"Installation Directory", &type, reinterpret_cast<LPBYTE>(&installationDirectoryStr), &installationDirectorySize);

     if (result == ERROR_SUCCESS && type == REG_SZ)
         directories.append(String(installationDirectoryStr, installationDirectorySize / sizeof(WCHAR) - 1));
 }

 static inline void addQuickTimePluginDirectory(Vector<String>& directories)
 {
     DWORD type;
     WCHAR installationDirectoryStr[MAX_PATH];
     DWORD installationDirectorySize = sizeof(installationDirectoryStr);

     HRESULT result = ::SHGetValueW(HKEY_LOCAL_MACHINE, L"Software\\Apple Computer, Inc.\\QuickTime", L"InstallDir", &type, reinterpret_cast<LPBYTE>(&installationDirectoryStr), &installationDirectorySize);

     if (result == ERROR_SUCCESS && type == REG_SZ) {
         String pluginDir = String(installationDirectoryStr, installationDirectorySize / sizeof(WCHAR) - 1) + "\\plugins";
         directories.append(pluginDir);
     }
 }

 static inline void addAdobeAcrobatPluginDirectory(Vector<String>& directories)
 {
     HKEY key;
     HRESULT result = ::RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"Software\\Adobe\\Acrobat Reader", 0, KEY_READ, &key);
     if (result != ERROR_SUCCESS)
         return;

     WCHAR name[128];
     FILETIME lastModified;

     Vector<int> latestAcrobatVersion;
     String latestAcrobatVersionString;

     // Enumerate subkeys
     for (int i = 0;; i++) {
         DWORD nameLen = WTF_ARRAY_LENGTH(name);
         result = ::RegEnumKeyExW(key, i, name, &nameLen, 0, 0, 0, &lastModified);

         if (result != ERROR_SUCCESS)
             break;

         Vector<int> acrobatVersion = parseVersionString(String(name, nameLen));
         if (compareVersions(acrobatVersion, latestAcrobatVersion)) {
             latestAcrobatVersion = acrobatVersion;
             latestAcrobatVersionString = String(name, nameLen);
         }
     }

     if (!latestAcrobatVersionString.isNull()) {
         DWORD type;
         WCHAR acrobatInstallPathStr[MAX_PATH];
         DWORD acrobatInstallPathSize = sizeof(acrobatInstallPathStr);

         String acrobatPluginKeyPath = "Software\\Adobe\\Acrobat Reader\\" + latestAcrobatVersionString + "\\InstallPath";
         result = ::SHGetValueW(HKEY_LOCAL_MACHINE, acrobatPluginKeyPath.charactersWithNullTermination(), 0, &type, reinterpret_cast<LPBYTE>(acrobatInstallPathStr), &acrobatInstallPathSize);

         if (result == ERROR_SUCCESS) {
             String acrobatPluginDirectory = String(acrobatInstallPathStr, acrobatInstallPathSize / sizeof(WCHAR) - 1) + "\\browser";
             directories.append(acrobatPluginDirectory);
         }
     }

     ::RegCloseKey(key);
 }

 static inline void addMacromediaPluginDirectories(Vector<String>& directories)
 {
 #if !OS(WINCE)
     WCHAR systemDirectoryStr[MAX_PATH];

     if (!::GetSystemDirectoryW(systemDirectoryStr, WTF_ARRAY_LENGTH(systemDirectoryStr)))
         return;

     WCHAR macromediaDirectoryStr[MAX_PATH];

     if (!::PathCombineW(macromediaDirectoryStr, systemDirectoryStr, L"macromed\\Flash"))
         return;

     directories.append(macromediaDirectoryStr);

     if (!::PathCombineW(macromediaDirectoryStr, systemDirectoryStr, L"macromed\\Shockwave 10"))
         return;

     directories.append(macromediaDirectoryStr);
 #endif
 }

 Vector<String> PluginInfoStore::pluginsDirectories()
 {
     Vector<String> directories;

     String ourDirectory = safariPluginsDirectory();
     if (!ourDirectory.isNull())
         directories.append(ourDirectory);

     addQuickTimePluginDirectory(directories);
     addAdobeAcrobatPluginDirectory(directories);
     addMozillaPluginDirectories(directories);
     addWindowsMediaPlayerPluginDirectory(directories);
     addMacromediaPluginDirectories(directories);

     return directories;
 }

 Vector<String> PluginInfoStore::pluginPathsInDirectory(const String& directory)
 {
     Vector<String> paths;

     PathWalker walker(directory, "*");
     if (!walker.isValid())
         return paths;

     do {
         if (walker.data().dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
             continue;

         String filename = walker.data().cFileName;
         if ((!filename.startsWith("np", false) || !filename.endsWith("dll", false)) && (!equalIgnoringCase(filename, "Plugin.dll") || !directory.endsWith("Shockwave 10", false)))
             continue;

         paths.append(directory + "\\" + filename);
     } while (walker.step());

     return paths;
 }

 static void addPluginPathsFromRegistry(HKEY rootKey, Vector<String>& paths)
 {
     HKEY key;
     if (::RegOpenKeyExW(rootKey, L"Software\\MozillaPlugins", 0, KEY_ENUMERATE_SUB_KEYS, &key) != ERROR_SUCCESS)
         return;

     for (size_t i = 0; ; ++i) {
         // MSDN says that key names have a maximum length of 255 characters.
         wchar_t name[256];
         DWORD nameLen = WTF_ARRAY_LENGTH(name);
         if (::RegEnumKeyExW(key, i, name, &nameLen, 0, 0, 0, 0) != ERROR_SUCCESS)
             break;

         wchar_t path[MAX_PATH];
         DWORD pathSizeInBytes = sizeof(path);
         DWORD type;
         if (::SHGetValueW(key, name, L"Path", &type, path, &pathSizeInBytes) != ERROR_SUCCESS)
             continue;
         if (type != REG_SZ)
             continue;

         paths.append(path);
     }

     ::RegCloseKey(key);
 }

 Vector<String> PluginInfoStore::individualPluginPaths()
 {
     Vector<String> paths;

     addPluginPathsFromRegistry(HKEY_LOCAL_MACHINE, paths);
     addPluginPathsFromRegistry(HKEY_CURRENT_USER, paths);

     return paths;
 }

 static uint64_t fileVersion(DWORD leastSignificant, DWORD mostSignificant)
 {
     ULARGE_INTEGER version;
     version.LowPart = leastSignificant;
     version.HighPart = mostSignificant;
     return version.QuadPart;
 }

 bool PluginInfoStore::getPluginInfo(const String& pluginPath, Plugin& plugin)
 {
     return NetscapePluginModule::getPluginInfo(pluginPath, plugin);
 }

 static bool isOldWindowsMediaPlayerPlugin(const PluginInfoStore::Plugin& plugin)
 {
     return equalIgnoringCase(plugin.info.file, "npdsplay.dll");
 }

 static bool isNewWindowsMediaPlayerPlugin(const PluginInfoStore::Plugin& plugin)
 {
     return equalIgnoringCase(plugin.info.file, "np-mswmp.dll");
 }

 bool PluginInfoStore::shouldUsePlugin(const Plugin& plugin)
 {
     if (plugin.info.name == "Citrix ICA Client") {
         // The Citrix ICA Client plug-in requires a Mozilla-based browser; see <rdar://6418681>.
         return false;
     }

     if (plugin.info.name == "Silverlight Plug-In") {
         // workaround for <rdar://5557379> Crash in Silverlight when opening microsoft.com.
         // the latest 1.0 version of Silverlight does not reproduce this crash, so allow it
         // and any newer versions
         static const uint64_t minimumRequiredVersion = fileVersion(0x51BE0000, 0x00010000);
         return plugin.fileVersion >= minimumRequiredVersion;
     }

     if (equalIgnoringCase(plugin.info.file, "npmozax.dll")) {
         // Bug 15217: Mozilla ActiveX control complains about missing xpcom_core.dll
         return false;
     }

     if (equalIgnoringCase(plugin.info.file, "npwpf.dll")) {
         // Bug 57119: Microsoft Windows Presentation Foundation (WPF) plug-in complains about missing xpcom.dll
         return false;
     }

     if (plugin.info.name == "Yahoo Application State Plugin") {
         // https://bugs.webkit.org/show_bug.cgi?id=26860
         // Bug in Yahoo Application State plug-in earlier than 1.0.0.6 leads to heap corruption.
         static const uint64_t minimumRequiredVersion = fileVersion(0x00000006, 0x00010000);
         return plugin.fileVersion >= minimumRequiredVersion;
     }

     if (isOldWindowsMediaPlayerPlugin(plugin)) {
         // Don't load the old Windows Media Player plugin if we've already loaded the new Windows
         // Media Player plugin.
         for (size_t i = 0; i < m_plugins.size(); ++i) {
             if (!isNewWindowsMediaPlayerPlugin(m_plugins[i]))
                 continue;
             return false;
         }
         return true;
     }

     if (isNewWindowsMediaPlayerPlugin(plugin)) {
         // Unload the old Windows Media Player plugin if we've already loaded it.
         for (size_t i = 0; i < m_plugins.size(); ++i) {
             if (!isOldWindowsMediaPlayerPlugin(m_plugins[i]))
                 continue;
             m_plugins.remove(i);
         }
         return true;
     }

     // FIXME: We should prefer a newer version of a plugin to an older version, rather than loading
     // only the first. <http://webkit.org/b/58469>
     String pluginFileName = pathGetFileName(plugin.path);
     for (size_t i = 0; i < m_plugins.size(); ++i) {
         Plugin& loadedPlugin = m_plugins[i];

         // If a plug-in with the same filename already exists, we don't want to load it.
         if (equalIgnoringCase(pluginFileName, pathGetFileName(loadedPlugin.path)))
             return false;
     }

     return true;
 }

 } // namespace WebKit
	/*
	* Copyright (C) 2010 Apple 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:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. 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.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
	*/

	#include "config.h"
	#include "PluginInfoStore.h"

	#include "NetscapePluginModule.h"
	#include <WebCore/FileSystem.h>
	#include <WebCore/PathWalker.h>
	#include <shlwapi.h>

	using namespace WebCore;

	namespace WebKit {

	static inline Vector<int> parseVersionString(const String& versionString)
	{
	Vector<int> version;

	unsigned startPos = 0;
	unsigned endPos;

	while (startPos < versionString.length()) {
	for (endPos = startPos; endPos < versionString.length(); ++endPos)
	if (versionString[endPos] == '.' \|\| versionString[endPos] == '_')
	break;

	int versionComponent = versionString.substring(startPos, endPos - startPos).toInt();
	version.append(versionComponent);

	startPos = endPos + 1;
	}

	return version;
	}

	// This returns whether versionA is higher than versionB
	static inline bool compareVersions(const Vector<int>& versionA, const Vector<int>& versionB)
	{
	for (unsigned i = 0; i < versionA.size(); i++) {
	if (i >= versionB.size())
	return true;

	if (versionA[i] > versionB[i])
	return true;
	else if (versionA[i] < versionB[i])
	return false;
	}

	// If we come here, the versions are either the same or versionB has an extra component, just return false
	return false;
	}

	static inline String safariPluginsDirectory()
	{
	static String pluginsDirectory;
	static bool cachedPluginDirectory = false;

	if (!cachedPluginDirectory) {
	cachedPluginDirectory = true;

	WCHAR moduleFileNameStr[MAX_PATH];
	int moduleFileNameLen = ::GetModuleFileNameW(0, moduleFileNameStr, WTF_ARRAY_LENGTH(moduleFileNameStr));

	if (!moduleFileNameLen \|\| moduleFileNameLen == WTF_ARRAY_LENGTH(moduleFileNameStr))
	return pluginsDirectory;

	if (!::PathRemoveFileSpecW(moduleFileNameStr))
	return pluginsDirectory;

	pluginsDirectory = String(moduleFileNameStr) + "\\Plugins";
	}

	return pluginsDirectory;
	}

	static inline void addMozillaPluginDirectories(Vector<String>& directories)
	{
	// Enumerate all Mozilla plugin directories in the registry
	HKEY key;
	LONG result = ::RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"Software\\Mozilla", 0, KEY_READ, &key);
	if (result != ERROR_SUCCESS)
	return;

	WCHAR name[128];
	FILETIME lastModified;

	// Enumerate subkeys
	for (int i = 0;; i++) {
	DWORD nameLen = WTF_ARRAY_LENGTH(name);
	result = ::RegEnumKeyExW(key, i, name, &nameLen, 0, 0, 0, &lastModified);

	if (result != ERROR_SUCCESS)
	break;

	String extensionsPath = String(name, nameLen) + "\\Extensions";
	HKEY extensionsKey;

	// Try opening the key
	result = ::RegOpenKeyExW(key, extensionsPath.charactersWithNullTermination(), 0, KEY_READ, &extensionsKey);

	if (result == ERROR_SUCCESS) {
	// Now get the plugins directory
	WCHAR pluginsDirectoryStr[MAX_PATH];
	DWORD pluginsDirectorySize = sizeof(pluginsDirectoryStr);
	DWORD type;

	result = ::RegQueryValueExW(extensionsKey, L"Plugins", 0, &type, reinterpret_cast<LPBYTE>(&pluginsDirectoryStr), &pluginsDirectorySize);

	if (result == ERROR_SUCCESS && type == REG_SZ)
	directories.append(String(pluginsDirectoryStr, pluginsDirectorySize / sizeof(WCHAR) - 1));

	::RegCloseKey(extensionsKey);
	}
	}

	::RegCloseKey(key);
	}

	static inline void addWindowsMediaPlayerPluginDirectory(Vector<String>& directories)
	{
	// The new WMP Firefox plugin is installed in \PFiles\Plugins if it can't find any Firefox installs
	WCHAR pluginDirectoryStr[MAX_PATH + 1];
	DWORD pluginDirectorySize = ::ExpandEnvironmentStringsW(L"%SYSTEMDRIVE%\\PFiles\\Plugins", pluginDirectoryStr, WTF_ARRAY_LENGTH(pluginDirectoryStr));

	if (pluginDirectorySize > 0 && pluginDirectorySize <= WTF_ARRAY_LENGTH(pluginDirectoryStr))
	directories.append(String(pluginDirectoryStr, pluginDirectorySize - 1));

	DWORD type;
	WCHAR installationDirectoryStr[MAX_PATH];
	DWORD installationDirectorySize = sizeof(installationDirectoryStr);

	HRESULT result = ::SHGetValueW(HKEY_LOCAL_MACHINE, L"Software\\Microsoft\\MediaPlayer", L"Installation Directory", &type, reinterpret_cast<LPBYTE>(&installationDirectoryStr), &installationDirectorySize);

	if (result == ERROR_SUCCESS && type == REG_SZ)
	directories.append(String(installationDirectoryStr, installationDirectorySize / sizeof(WCHAR) - 1));
	}

	static inline void addQuickTimePluginDirectory(Vector<String>& directories)
	{
	DWORD type;
	WCHAR installationDirectoryStr[MAX_PATH];
	DWORD installationDirectorySize = sizeof(installationDirectoryStr);

	HRESULT result = ::SHGetValueW(HKEY_LOCAL_MACHINE, L"Software\\Apple Computer, Inc.\\QuickTime", L"InstallDir", &type, reinterpret_cast<LPBYTE>(&installationDirectoryStr), &installationDirectorySize);

	if (result == ERROR_SUCCESS && type == REG_SZ) {
	String pluginDir = String(installationDirectoryStr, installationDirectorySize / sizeof(WCHAR) - 1) + "\\plugins";
	directories.append(pluginDir);
	}
	}

	static inline void addAdobeAcrobatPluginDirectory(Vector<String>& directories)
	{
	HKEY key;
	HRESULT result = ::RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"Software\\Adobe\\Acrobat Reader", 0, KEY_READ, &key);
	if (result != ERROR_SUCCESS)
	return;

	WCHAR name[128];
	FILETIME lastModified;

	Vector<int> latestAcrobatVersion;
	String latestAcrobatVersionString;

	// Enumerate subkeys
	for (int i = 0;; i++) {
	DWORD nameLen = WTF_ARRAY_LENGTH(name);
	result = ::RegEnumKeyExW(key, i, name, &nameLen, 0, 0, 0, &lastModified);

	if (result != ERROR_SUCCESS)
	break;

	Vector<int> acrobatVersion = parseVersionString(String(name, nameLen));
	if (compareVersions(acrobatVersion, latestAcrobatVersion)) {
	latestAcrobatVersion = acrobatVersion;
	latestAcrobatVersionString = String(name, nameLen);
	}
	}

	if (!latestAcrobatVersionString.isNull()) {
	DWORD type;
	WCHAR acrobatInstallPathStr[MAX_PATH];
	DWORD acrobatInstallPathSize = sizeof(acrobatInstallPathStr);

	String acrobatPluginKeyPath = "Software\\Adobe\\Acrobat Reader\\" + latestAcrobatVersionString + "\\InstallPath";
	result = ::SHGetValueW(HKEY_LOCAL_MACHINE, acrobatPluginKeyPath.charactersWithNullTermination(), 0, &type, reinterpret_cast<LPBYTE>(acrobatInstallPathStr), &acrobatInstallPathSize);

	if (result == ERROR_SUCCESS) {
	String acrobatPluginDirectory = String(acrobatInstallPathStr, acrobatInstallPathSize / sizeof(WCHAR) - 1) + "\\browser";
	directories.append(acrobatPluginDirectory);
	}
	}

	::RegCloseKey(key);
	}

	static inline void addMacromediaPluginDirectories(Vector<String>& directories)
	{
	#if !OS(WINCE)
	WCHAR systemDirectoryStr[MAX_PATH];

	if (!::GetSystemDirectoryW(systemDirectoryStr, WTF_ARRAY_LENGTH(systemDirectoryStr)))
	return;

	WCHAR macromediaDirectoryStr[MAX_PATH];

	if (!::PathCombineW(macromediaDirectoryStr, systemDirectoryStr, L"macromed\\Flash"))
	return;

	directories.append(macromediaDirectoryStr);

	if (!::PathCombineW(macromediaDirectoryStr, systemDirectoryStr, L"macromed\\Shockwave 10"))
	return;

	directories.append(macromediaDirectoryStr);
	#endif
	}

	Vector<String> PluginInfoStore::pluginsDirectories()
	{
	Vector<String> directories;

	String ourDirectory = safariPluginsDirectory();
	if (!ourDirectory.isNull())
	directories.append(ourDirectory);

	addQuickTimePluginDirectory(directories);
	addAdobeAcrobatPluginDirectory(directories);
	addMozillaPluginDirectories(directories);
	addWindowsMediaPlayerPluginDirectory(directories);
	addMacromediaPluginDirectories(directories);

	return directories;
	}

	Vector<String> PluginInfoStore::pluginPathsInDirectory(const String& directory)
	{
	Vector<String> paths;

	PathWalker walker(directory, "*");
	if (!walker.isValid())
	return paths;

	do {
	if (walker.data().dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
	continue;

	String filename = walker.data().cFileName;
	if ((!filename.startsWith("np", false) \|\| !filename.endsWith("dll", false)) && (!equalIgnoringCase(filename, "Plugin.dll") \|\| !directory.endsWith("Shockwave 10", false)))
	continue;

	paths.append(directory + "\\" + filename);
	} while (walker.step());

	return paths;
	}

	static void addPluginPathsFromRegistry(HKEY rootKey, Vector<String>& paths)
	{
	HKEY key;
	if (::RegOpenKeyExW(rootKey, L"Software\\MozillaPlugins", 0, KEY_ENUMERATE_SUB_KEYS, &key) != ERROR_SUCCESS)
	return;

	for (size_t i = 0; ; ++i) {
	// MSDN says that key names have a maximum length of 255 characters.
	wchar_t name[256];
	DWORD nameLen = WTF_ARRAY_LENGTH(name);
	if (::RegEnumKeyExW(key, i, name, &nameLen, 0, 0, 0, 0) != ERROR_SUCCESS)
	break;

	wchar_t path[MAX_PATH];
	DWORD pathSizeInBytes = sizeof(path);
	DWORD type;
	if (::SHGetValueW(key, name, L"Path", &type, path, &pathSizeInBytes) != ERROR_SUCCESS)
	continue;
	if (type != REG_SZ)
	continue;

	paths.append(path);
	}

	::RegCloseKey(key);
	}

	Vector<String> PluginInfoStore::individualPluginPaths()
	{
	Vector<String> paths;

	addPluginPathsFromRegistry(HKEY_LOCAL_MACHINE, paths);
	addPluginPathsFromRegistry(HKEY_CURRENT_USER, paths);

	return paths;
	}

	static uint64_t fileVersion(DWORD leastSignificant, DWORD mostSignificant)
	{
	ULARGE_INTEGER version;
	version.LowPart = leastSignificant;
	version.HighPart = mostSignificant;
	return version.QuadPart;
	}

	bool PluginInfoStore::getPluginInfo(const String& pluginPath, Plugin& plugin)
	{
	return NetscapePluginModule::getPluginInfo(pluginPath, plugin);
	}

	static bool isOldWindowsMediaPlayerPlugin(const PluginInfoStore::Plugin& plugin)
	{
	return equalIgnoringCase(plugin.info.file, "npdsplay.dll");
	}

	static bool isNewWindowsMediaPlayerPlugin(const PluginInfoStore::Plugin& plugin)
	{
	return equalIgnoringCase(plugin.info.file, "np-mswmp.dll");
	}

	bool PluginInfoStore::shouldUsePlugin(const Plugin& plugin)
	{
	if (plugin.info.name == "Citrix ICA Client") {
	// The Citrix ICA Client plug-in requires a Mozilla-based browser; see <rdar://6418681>.
	return false;
	}

	if (plugin.info.name == "Silverlight Plug-In") {
	// workaround for <rdar://5557379> Crash in Silverlight when opening microsoft.com.
	// the latest 1.0 version of Silverlight does not reproduce this crash, so allow it
	// and any newer versions
	static const uint64_t minimumRequiredVersion = fileVersion(0x51BE0000, 0x00010000);
	return plugin.fileVersion >= minimumRequiredVersion;
	}

	if (equalIgnoringCase(plugin.info.file, "npmozax.dll")) {
	// Bug 15217: Mozilla ActiveX control complains about missing xpcom_core.dll
	return false;
	}

	if (equalIgnoringCase(plugin.info.file, "npwpf.dll")) {
	// Bug 57119: Microsoft Windows Presentation Foundation (WPF) plug-in complains about missing xpcom.dll
	return false;
	}

	if (plugin.info.name == "Yahoo Application State Plugin") {
	// https://bugs.webkit.org/show_bug.cgi?id=26860
	// Bug in Yahoo Application State plug-in earlier than 1.0.0.6 leads to heap corruption.
	static const uint64_t minimumRequiredVersion = fileVersion(0x00000006, 0x00010000);
	return plugin.fileVersion >= minimumRequiredVersion;
	}

	if (isOldWindowsMediaPlayerPlugin(plugin)) {
	// Don't load the old Windows Media Player plugin if we've already loaded the new Windows
	// Media Player plugin.
	for (size_t i = 0; i < m_plugins.size(); ++i) {
	if (!isNewWindowsMediaPlayerPlugin(m_plugins[i]))
	continue;
	return false;
	}
	return true;
	}

	if (isNewWindowsMediaPlayerPlugin(plugin)) {
	// Unload the old Windows Media Player plugin if we've already loaded it.
	for (size_t i = 0; i < m_plugins.size(); ++i) {
	if (!isOldWindowsMediaPlayerPlugin(m_plugins[i]))
	continue;
	m_plugins.remove(i);
	}
	return true;
	}

	// FIXME: We should prefer a newer version of a plugin to an older version, rather than loading
	// only the first. <http://webkit.org/b/58469>
	String pluginFileName = pathGetFileName(plugin.path);
	for (size_t i = 0; i < m_plugins.size(); ++i) {
	Plugin& loadedPlugin = m_plugins[i];

	// If a plug-in with the same filename already exists, we don't want to load it.
	if (equalIgnoringCase(pluginFileName, pathGetFileName(loadedPlugin.path)))
	return false;
	}

	return true;
	}

	} // namespace WebKit