зеркало из https://github.com/mozilla/gecko-dev.git
387 строки
12 KiB
C++
387 строки
12 KiB
C++
/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the Mozilla browser.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications, Inc. Portions created by Netscape are
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* Copyright (C) 1999, Mozilla. All Rights Reserved.
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*
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* Contributor(s):
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* Scott MacGregor <mscott@netscape.com>
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*/
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#include "nsOSHelperAppService.h"
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#include "nsISupports.h"
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#include "nsString.h"
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#include "nsXPIDLString.h"
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#include "nsIURL.h"
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#include "nsIMIMEInfo.h"
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#include "nsMimeTypes.h"
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#include "nsILocalFile.h"
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// we need windows.h to read out registry information...
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#include <windows.h>
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// helper methods: forward declarations...
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BYTE * GetValueBytes( HKEY hKey, const char *pValueName, DWORD *pLen=0);
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nsresult GetExtensionFrom4xRegistryInfo(const char * aMimeType, nsCString& aFileExtension);
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nsresult GetExtensionFromWindowsMimeDatabase(const char * aMimeType, nsCString& aFileExtension);
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nsOSHelperAppService::nsOSHelperAppService() : nsExternalHelperAppService()
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{}
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nsOSHelperAppService::~nsOSHelperAppService()
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{}
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NS_IMETHODIMP nsOSHelperAppService::LaunchAppWithTempFile(nsIMIMEInfo * aMIMEInfo, nsIFile * aTempFile)
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{
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nsresult rv = NS_OK;
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if (aMIMEInfo)
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{
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nsCOMPtr<nsIFile> application;
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nsXPIDLCString path;
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aTempFile->GetPath(getter_Copies(path));
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nsMIMEInfoHandleAction action = nsIMIMEInfo::useSystemDefault;
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aMIMEInfo->GetPreferredAction(&action);
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aMIMEInfo->GetPreferredApplicationHandler(getter_AddRefs(application));
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if (application && action == nsIMIMEInfo::useHelperApp)
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{
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// if we were given an application to use then use it....otherwise
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// make the registry call to launch the app
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const char * strPath = (const char *) path;
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application->Spawn(&strPath, 1);
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}
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else // use the system default
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{
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// use the app registry name to launch a shell execute....
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LONG r = (LONG) ::ShellExecute( NULL, "open", (const char *) path, NULL, NULL, SW_SHOWNORMAL);
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if (r < 32)
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rv = NS_ERROR_FAILURE;
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else
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rv = NS_OK;
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}
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}
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return rv;
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}
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// The windows registry provides a mime database key which lists a set of mime types and corresponding "Extension" values.
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// we can use this to look up our mime type to see if there is a preferred extension for the mime type.
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nsresult GetExtensionFromWindowsMimeDatabase(const char * aMimeType, nsCString& aFileExtension)
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{
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nsresult rv = NS_OK;
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HKEY hKey;
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nsCAutoString mimeDatabaseKey ("MIME\\Database\\Content Type\\");
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mimeDatabaseKey += aMimeType;
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LONG err = ::RegOpenKeyEx( HKEY_CLASSES_ROOT, mimeDatabaseKey, 0, KEY_QUERY_VALUE, &hKey);
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if (err == ERROR_SUCCESS)
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{
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LPBYTE pBytes = GetValueBytes( hKey, "Extension");
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if (pBytes)
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{
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aFileExtension = (char * )pBytes;
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}
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delete pBytes;
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::RegCloseKey(hKey);
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}
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return NS_OK;
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}
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// We have a serious problem!! I have this content type and the windows registry only gives me
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// helper apps based on extension. Right now, we really don't have a good place to go for
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// trying to figure out the extension for a particular mime type....One short term hack is to look
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// this information in 4.x (it's stored in the windows regsitry).
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nsresult GetExtensionFrom4xRegistryInfo(const char * aMimeType, nsCString& aFileExtension)
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{
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nsCAutoString command ("Software\\Netscape\\Netscape Navigator\\Suffixes");
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nsresult rv = NS_OK;
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HKEY hKey;
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LONG err = ::RegOpenKeyEx( HKEY_CURRENT_USER, command, 0, KEY_QUERY_VALUE, &hKey);
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if (err == ERROR_SUCCESS)
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{
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LPBYTE pBytes = GetValueBytes( hKey, aMimeType);
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if (pBytes) // only try to get the extension if we have a value!
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{
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aFileExtension = ".";
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aFileExtension.Append( (char *) pBytes);
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// this may be a comma separate list of extensions...just take the first one
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// for now...
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PRInt32 pos = aFileExtension.FindChar(',', PR_TRUE);
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if (pos > 0) // we have a comma separated list of languages...
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aFileExtension.Truncate(pos); // truncate everything after the first comma (including the comma)
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}
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delete [] pBytes;
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// close the key
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::RegCloseKey(hKey);
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}
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else
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rv = NS_ERROR_FAILURE; // no 4.x extension mapping found!
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return rv;
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}
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static BYTE * GetValueBytes( HKEY hKey, const char *pValueName, DWORD *pLen)
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{
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LONG err;
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DWORD bufSz;
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LPBYTE pBytes = NULL;
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err = ::RegQueryValueEx( hKey, pValueName, NULL, NULL, NULL, &bufSz);
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if (err == ERROR_SUCCESS) {
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pBytes = new BYTE[bufSz];
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err = ::RegQueryValueEx( hKey, pValueName, NULL, NULL, pBytes, &bufSz);
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if (err != ERROR_SUCCESS) {
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delete [] pBytes;
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pBytes = NULL;
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} else {
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// Return length if caller wanted it.
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if ( pLen ) {
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*pLen = bufSz;
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}
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}
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}
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return( pBytes);
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}
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NS_IMETHODIMP nsOSHelperAppService::ExternalProtocolHandlerExists(const char * aProtocolScheme, PRBool * aHandlerExists)
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{
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// look up the protocol scheme in the windows registry....if we find a match then we have a handler for it...
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*aHandlerExists = PR_FALSE;
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if (aProtocolScheme && *aProtocolScheme)
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{
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HKEY hKey;
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LONG err = ::RegOpenKeyEx( HKEY_CLASSES_ROOT, aProtocolScheme, 0, KEY_QUERY_VALUE, &hKey);
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if (err == ERROR_SUCCESS)
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{
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*aHandlerExists = PR_TRUE;
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// close the key
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::RegCloseKey(hKey);
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}
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}
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return NS_OK;
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}
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// this implementation was pretty much copied verbatime from Tony Robinson's code in nsExternalProtocolWin.cpp
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NS_IMETHODIMP nsOSHelperAppService::LoadUrl(nsIURI * aURL)
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{
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nsresult rv = NS_OK;
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// 1. Find the default app for this protocol
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// 2. Set up the command line
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// 3. Launch the app.
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// For now, we'll just cheat essentially, check for the command line
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// then just call ShellExecute()!
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if (aURL)
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{
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// extract the url spec from the url
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nsXPIDLCString urlSpec;
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aURL->GetSpec(getter_Copies(urlSpec));
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LONG r = (LONG) ::ShellExecute( NULL, "open", (const char *) urlSpec, NULL, NULL, SW_SHOWNORMAL);
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if (r < 32)
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rv = NS_ERROR_FAILURE;
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}
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return rv;
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}
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nsresult nsOSHelperAppService::GetFileTokenForPath(const PRUnichar * platformAppPath, nsIFile ** aFile)
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{
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nsCOMPtr<nsILocalFile> localFile (do_CreateInstance(NS_LOCAL_FILE_CONTRACTID));
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nsresult rv = NS_OK;
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if (localFile)
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{
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if (localFile)
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localFile->InitWithUnicodePath(platformAppPath);
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*aFile = localFile;
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NS_IF_ADDREF(*aFile);
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}
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else
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rv = NS_ERROR_FAILURE;
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return rv;
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}
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// GetMIMEInfoFromRegistry: This function obtains the values of some of the nsIMIMEInfo
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// attributes for the mimeType/extension associated with the input registry key. The default
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// entry for that key is the name of a registry key under HKEY_CLASSES_ROOT. The default
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// value for *that* key is the descriptive name of the type. The EditFlags value is a binary
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// value; the low order bit of the third byte of which indicates that the user does not need
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// to be prompted.
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//
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// This function sets only the Description and AlwaysAskBeforeHandling attributes of the
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// input nsIMIMEInfo.
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static nsresult GetMIMEInfoFromRegistry( LPBYTE fileType, nsIMIMEInfo *pInfo )
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{
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nsresult rv = NS_OK;
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NS_ENSURE_ARG( fileType );
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NS_ENSURE_ARG( pInfo );
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// Get registry key for the pointed-to "file type."
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HKEY fileTypeKey = 0;
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LONG rc = ::RegOpenKeyEx( HKEY_CLASSES_ROOT, (const char *)fileType, 0, KEY_QUERY_VALUE, &fileTypeKey );
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if ( rc == ERROR_SUCCESS )
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{
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// OK, the default value here is the description of the type.
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LPBYTE pDesc = GetValueBytes( fileTypeKey, "" );
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if ( pDesc )
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{
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nsAutoString desc; desc.AssignWithConversion((const char*)pDesc);
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pInfo->SetDescription( desc.GetUnicode() );
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delete [] pDesc;
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}
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// Now get EditFlags.
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DWORD len = 0;
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LPBYTE pEditFlags = GetValueBytes( fileTypeKey, "EditFlags", &len );
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if ( pEditFlags )
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{
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// Test "confirm open after download" setting. Note that this bit is
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// *on* if that checkbox is unchecked.
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if ( ( len >= 3 ) && ( pEditFlags[2] & 0x01 ) )
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{
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// This means we don't ask.
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pInfo->SetAlwaysAskBeforeHandling( PR_FALSE );
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}
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delete [] pEditFlags;
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}
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}
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else
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{
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rv = NS_ERROR_FAILURE;
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}
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return rv;
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}
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/////////////////////////////////////////////////////////////////////////////////////////////////
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// nsIMIMEService method over-rides used to gather information from the windows registry for
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// various mime types.
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////////////////////////////////////////////////////////////////////////////////////////////////
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NS_IMETHODIMP nsOSHelperAppService::GetFromExtension(const char *aFileExt, nsIMIMEInfo **_retval)
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{
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// first, see if the base class already has an entry....
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nsresult rv = nsExternalHelperAppService::GetFromExtension(aFileExt, _retval);
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if (NS_SUCCEEDED(rv) && *_retval) return NS_OK; // okay we got an entry so we are done.
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if (!aFileExt || *aFileExt == '\0') return NS_ERROR_FAILURE;
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rv = NS_OK;
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// windows registry assumes your file extension is going to include the '.'.
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// so make sure it's there...
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nsCAutoString fileExtToUse;
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if (aFileExt && aFileExt[0] != '.')
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fileExtToUse = '.';
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fileExtToUse.Append(aFileExt);
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// o.t. try to get an entry from the windows registry.
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HKEY hKey;
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LONG err = ::RegOpenKeyEx( HKEY_CLASSES_ROOT, fileExtToUse, 0, KEY_QUERY_VALUE, &hKey);
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if (err == ERROR_SUCCESS)
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{
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LPBYTE pBytes = GetValueBytes( hKey, "Content Type");
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LPBYTE pFileDescription = GetValueBytes(hKey, "");
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nsCOMPtr<nsIMIMEInfo> mimeInfo (do_CreateInstance(NS_MIMEINFO_CONTRACTID));
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if (mimeInfo && pBytes)
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{
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mimeInfo->SetMIMEType((char *) pBytes);
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// if the file extension includes the '.' then we don't want to include that when we append
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// it to the mime info object.
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if (aFileExt && *aFileExt == '.' && (aFileExt+1))
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mimeInfo->AppendExtension(aFileExt+1);
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else
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mimeInfo->AppendExtension(aFileExt);
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mimeInfo->SetPreferredAction(nsIMIMEInfo::useSystemDefault);
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nsAutoString description;
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description.AssignWithConversion((char *) pFileDescription);
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PRInt32 pos = description.FindChar('.', PR_TRUE);
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if (pos > 0)
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description.Truncate(pos);
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// the format of the description usually looks like appname.version.something.
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// for now, let's try to make it pretty and just show you the appname.
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mimeInfo->SetApplicationDescription(description.GetUnicode());
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// Get other nsIMIMEInfo fields from registry, if possible.
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if ( pFileDescription )
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{
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GetMIMEInfoFromRegistry( pFileDescription, mimeInfo );
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}
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// if we got here, then set our return variable
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*_retval = mimeInfo;
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NS_ADDREF(*_retval);
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}
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else
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rv = NS_ERROR_FAILURE; // we failed to really find an entry in the registry
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delete [] pBytes;
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delete [] pFileDescription;
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// close the key
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::RegCloseKey(hKey);
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}
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// we failed to find a mime type.
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if (!*_retval) rv = NS_ERROR_FAILURE;
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return rv;
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}
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NS_IMETHODIMP nsOSHelperAppService::GetFromMIMEType(const char *aMIMEType, nsIMIMEInfo ** _retval)
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{
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// first, see if the base class already has an entry....
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nsresult rv = nsExternalHelperAppService::GetFromMIMEType(aMIMEType, _retval);
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if (NS_SUCCEEDED(rv) && *_retval) return NS_OK; // okay we got an entry so we are done.
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// (1) try to use the windows mime database to see if there is a mapping to a file extension
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// (2) try to see if we have some left over 4.x registry info we can peek at...
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nsCAutoString fileExtension;
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GetExtensionFromWindowsMimeDatabase(aMIMEType, fileExtension);
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if (fileExtension.IsEmpty())
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GetExtensionFrom4xRegistryInfo(aMIMEType, fileExtension);
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// now look up based on the file extension.
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if (!fileExtension.IsEmpty())
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return GetFromExtension(fileExtension, _retval);
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else
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rv = NS_ERROR_FAILURE;
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return rv;
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}
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