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gecko/uriloader/exthandler/win/nsOSHelperAppService.cpp
Michael Kohler dab190d2bc Bug 506041 - Correct misspellings in source code (Patch 3) 
r=timeless

--HG--
extra : rebase_source : 1917c999a5865676ffb7ec3c2834c3e091bb64dc
2010-07-07 15:33:52 +02:00

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/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim:set ts=2 sts=2 sw=2 et cin:
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Mozilla browser.
*
* The Initial Developer of the Original Code is
* Netscape Communications, Inc.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Scott MacGregor <mscott@netscape.com>
* Dan Mosedale <dmose@mozilla.org>
* Jim Mathies <jmathies@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsOSHelperAppService.h"
#include "nsISupports.h"
#include "nsString.h"
#include "nsXPIDLString.h"
#include "nsIURL.h"
#include "nsIMIMEInfo.h"
#include "nsMIMEInfoWin.h"
#include "nsMimeTypes.h"
#include "nsILocalFileWin.h"
#include "nsIProcess.h"
#include "plstr.h"
#include "nsAutoPtr.h"
#include "nsNativeCharsetUtils.h"
#include "nsIWindowsRegKey.h"
// shellapi.h is needed to build with WIN32_LEAN_AND_MEAN
#include <shellapi.h>
#define LOG(args) PR_LOG(mLog, PR_LOG_DEBUG, args)
// helper methods: forward declarations...
static nsresult GetExtensionFrom4xRegistryInfo(const nsACString& aMimeType,
nsString& aFileExtension);
static nsresult GetExtensionFromWindowsMimeDatabase(const nsACString& aMimeType,
nsString& aFileExtension);
nsOSHelperAppService::nsOSHelperAppService() :
nsExternalHelperAppService()
#if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_LONGHORN
, mAppAssoc(nsnull)
#endif
{
#if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_LONGHORN
CoInitialize(NULL);
CoCreateInstance(CLSID_ApplicationAssociationRegistration, NULL, CLSCTX_INPROC,
IID_IApplicationAssociationRegistration, (void**)&mAppAssoc);
#endif
}
nsOSHelperAppService::~nsOSHelperAppService()
{
#if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_LONGHORN
if (mAppAssoc)
mAppAssoc->Release();
mAppAssoc = nsnull;
CoUninitialize();
#endif
}
// The windows registry provides a mime database key which lists a set of mime types and corresponding "Extension" values.
// we can use this to look up our mime type to see if there is a preferred extension for the mime type.
static nsresult GetExtensionFromWindowsMimeDatabase(const nsACString& aMimeType,
nsString& aFileExtension)
{
nsAutoString mimeDatabaseKey;
mimeDatabaseKey.AssignLiteral("MIME\\Database\\Content Type\\");
AppendASCIItoUTF16(aMimeType, mimeDatabaseKey);
nsCOMPtr<nsIWindowsRegKey> regKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1");
if (!regKey)
return NS_ERROR_NOT_AVAILABLE;
nsresult rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CLASSES_ROOT,
mimeDatabaseKey,
nsIWindowsRegKey::ACCESS_QUERY_VALUE);
if (NS_SUCCEEDED(rv))
regKey->ReadStringValue(NS_LITERAL_STRING("Extension"), aFileExtension);
return NS_OK;
}
// We have a serious problem!! I have this content type and the windows registry only gives me
// helper apps based on extension. Right now, we really don't have a good place to go for
// trying to figure out the extension for a particular mime type....One short term hack is to look
// this information in 4.x (it's stored in the windows regsitry).
static nsresult GetExtensionFrom4xRegistryInfo(const nsACString& aMimeType,
nsString& aFileExtension)
{
nsCOMPtr<nsIWindowsRegKey> regKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1");
if (!regKey)
return NS_ERROR_NOT_AVAILABLE;
nsresult rv = regKey->
Open(nsIWindowsRegKey::ROOT_KEY_CURRENT_USER,
NS_LITERAL_STRING("Software\\Netscape\\Netscape Navigator\\Suffixes"),
nsIWindowsRegKey::ACCESS_QUERY_VALUE);
if (NS_FAILED(rv))
return NS_ERROR_NOT_AVAILABLE;
rv = regKey->ReadStringValue(NS_ConvertASCIItoUTF16(aMimeType),
aFileExtension);
if (NS_FAILED(rv))
return NS_OK;
aFileExtension.Insert(PRUnichar('.'), 0);
// this may be a comma separated list of extensions...just take the
// first one for now...
PRInt32 pos = aFileExtension.FindChar(PRUnichar(','));
if (pos > 0) {
// we have a comma separated list of types...
// truncate everything after the first comma (including the comma)
aFileExtension.Truncate(pos);
}
return NS_OK;
}
nsresult nsOSHelperAppService::OSProtocolHandlerExists(const char * aProtocolScheme, PRBool * aHandlerExists)
{
// look up the protocol scheme in the windows registry....if we find a match then we have a handler for it...
*aHandlerExists = PR_FALSE;
if (aProtocolScheme && *aProtocolScheme)
{
#if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_LONGHORN
// Vista: use new application association interface
if (mAppAssoc) {
PRUnichar * pResult = nsnull;
NS_ConvertASCIItoUTF16 scheme(aProtocolScheme);
// We are responsible for freeing returned strings.
HRESULT hr = mAppAssoc->QueryCurrentDefault(scheme.get(),
AT_URLPROTOCOL, AL_EFFECTIVE,
&pResult);
if (SUCCEEDED(hr)) {
CoTaskMemFree(pResult);
*aHandlerExists = PR_TRUE;
}
return NS_OK;
}
#endif
HKEY hKey;
LONG err = ::RegOpenKeyExW(HKEY_CLASSES_ROOT,
NS_ConvertASCIItoUTF16(aProtocolScheme).get(),
0,
KEY_QUERY_VALUE,
&hKey);
if (err == ERROR_SUCCESS)
{
err = ::RegQueryValueExW(hKey, L"URL Protocol", NULL, NULL, NULL, NULL);
*aHandlerExists = (err == ERROR_SUCCESS);
// close the key
::RegCloseKey(hKey);
}
}
return NS_OK;
}
NS_IMETHODIMP nsOSHelperAppService::GetApplicationDescription(const nsACString& aScheme, nsAString& _retval)
{
nsCOMPtr<nsIWindowsRegKey> regKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1");
if (!regKey)
return NS_ERROR_NOT_AVAILABLE;
NS_ConvertASCIItoUTF16 buf(aScheme);
#if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_LONGHORN
// Vista: use new application association interface
if (mAppAssoc) {
PRUnichar * pResult = nsnull;
// We are responsible for freeing returned strings.
HRESULT hr = mAppAssoc->QueryCurrentDefault(buf.get(),
AT_URLPROTOCOL, AL_EFFECTIVE,
&pResult);
if (SUCCEEDED(hr)) {
nsCOMPtr<nsIFile> app;
nsAutoString appInfo(pResult);
CoTaskMemFree(pResult);
if (NS_SUCCEEDED(GetDefaultAppInfo(appInfo, _retval, getter_AddRefs(app))))
return NS_OK;
}
return NS_ERROR_NOT_AVAILABLE;
}
#endif
nsCOMPtr<nsIFile> app;
GetDefaultAppInfo(buf, _retval, getter_AddRefs(app));
if (!_retval.Equals(buf))
return NS_OK;
// Fall back to full path
buf.AppendLiteral("\\shell\\open\\command");
nsresult rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CLASSES_ROOT,
buf,
nsIWindowsRegKey::ACCESS_QUERY_VALUE);
if (NS_FAILED(rv))
return NS_ERROR_NOT_AVAILABLE;
rv = regKey->ReadStringValue(EmptyString(), _retval);
return NS_SUCCEEDED(rv) ? NS_OK : NS_ERROR_NOT_AVAILABLE;
}
// GetMIMEInfoFromRegistry: This function obtains the values of some of the nsIMIMEInfo
// attributes for the mimeType/extension associated with the input registry key. The default
// entry for that key is the name of a registry key under HKEY_CLASSES_ROOT. The default
// value for *that* key is the descriptive name of the type. The EditFlags value is a binary
// value; the low order bit of the third byte of which indicates that the user does not need
// to be prompted.
//
// This function sets only the Description attribute of the input nsIMIMEInfo.
/* static */
nsresult nsOSHelperAppService::GetMIMEInfoFromRegistry(const nsAFlatString& fileType, nsIMIMEInfo *pInfo)
{
nsresult rv = NS_OK;
NS_ENSURE_ARG(pInfo);
nsCOMPtr<nsIWindowsRegKey> regKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1");
if (!regKey)
return NS_ERROR_NOT_AVAILABLE;
rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CLASSES_ROOT,
fileType, nsIWindowsRegKey::ACCESS_QUERY_VALUE);
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
// OK, the default value here is the description of the type.
nsAutoString description;
rv = regKey->ReadStringValue(EmptyString(), description);
if (NS_SUCCEEDED(rv))
pInfo->SetDescription(description);
return NS_OK;
}
/////////////////////////////////////////////////////////////////////////////////////////////////
// method overrides used to gather information from the windows registry for
// various mime types.
////////////////////////////////////////////////////////////////////////////////////////////////
/// Looks up the type for the extension aExt and compares it to aType
/* static */ PRBool
nsOSHelperAppService::typeFromExtEquals(const PRUnichar* aExt, const char *aType)
{
if (!aType)
return PR_FALSE;
nsAutoString fileExtToUse;
if (aExt[0] != PRUnichar('.'))
fileExtToUse = PRUnichar('.');
fileExtToUse.Append(aExt);
PRBool eq = PR_FALSE;
nsCOMPtr<nsIWindowsRegKey> regKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1");
if (!regKey)
return eq;
nsresult rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CLASSES_ROOT,
fileExtToUse,
nsIWindowsRegKey::ACCESS_QUERY_VALUE);
if (NS_FAILED(rv))
return eq;
nsAutoString type;
rv = regKey->ReadStringValue(NS_LITERAL_STRING("Content Type"), type);
if (NS_SUCCEEDED(rv))
eq = type.EqualsASCII(aType);
return eq;
}
// Strip a handler command string of its quotes and parameters.
static void CleanupHandlerPath(nsString& aPath)
{
// Example command strings passed into this routine:
// 1) C:\Program Files\Company\some.exe -foo -bar
// 2) C:\Program Files\Company\some.dll
// 3) C:\Windows\some.dll,-foo -bar
// 4) C:\Windows\some.cpl,-foo -bar
PRInt32 lastCommaPos = aPath.RFindChar(',');
if (lastCommaPos != kNotFound)
aPath.Truncate(lastCommaPos);
aPath.AppendLiteral(" ");
// case insensitive
PRUint32 index = aPath.Find(".exe ", PR_TRUE);
if (index == kNotFound)
index = aPath.Find(".dll ", PR_TRUE);
if (index == kNotFound)
index = aPath.Find(".cpl ", PR_TRUE);
if (index != kNotFound)
aPath.Truncate(index + 4);
aPath.Trim(" ", PR_TRUE, PR_TRUE);
}
// Strip the windows host process bootstrap executable rundll32.exe
// from a handler's command string if it exists.
static void StripRundll32(nsString& aCommandString)
{
// Example rundll formats:
// C:\Windows\System32\rundll32.exe "path to dll"
// rundll32.exe "path to dll"
// C:\Windows\System32\rundll32.exe "path to dll", var var
// rundll32.exe "path to dll", var var
NS_NAMED_LITERAL_STRING(rundllSegment, "rundll32.exe ");
NS_NAMED_LITERAL_STRING(rundllSegmentShort, "rundll32 ");
// case insensitive
PRInt32 strLen = rundllSegment.Length();
PRInt32 index = aCommandString.Find(rundllSegment, PR_TRUE);
if (index == kNotFound) {
strLen = rundllSegmentShort.Length();
index = aCommandString.Find(rundllSegmentShort, PR_TRUE);
}
if (index != kNotFound) {
PRUint32 rundllSegmentLength = index + strLen;
aCommandString.Cut(0, rundllSegmentLength);
}
}
// Returns the fully qualified path to an application handler based on
// a parameterized command string. Note this routine should not be used
// to launch the associated application as it strips parameters and
// rundll.exe from the string. Designed for retrieving display information
// on a particular handler.
/* static */ PRBool nsOSHelperAppService::CleanupCmdHandlerPath(nsAString& aCommandHandler)
{
nsAutoString handlerCommand(aCommandHandler);
// Straight command path:
//
// %SystemRoot%\system32\NOTEPAD.EXE var
// "C:\Program Files\iTunes\iTunes.exe" var var
// C:\Program Files\iTunes\iTunes.exe var var
//
// Example rundll handlers:
//
// rundll32.exe "%ProgramFiles%\Win...ery\PhotoViewer.dll", var var
// rundll32.exe "%ProgramFiles%\Windows Photo Gallery\PhotoViewer.dll"
// C:\Windows\System32\rundll32.exe "path to dll", var var
// %SystemRoot%\System32\rundll32.exe "%ProgramFiles%\Win...ery\Photo
// Viewer.dll", var var
// Expand environment variables so we have full path strings.
PRUint32 bufLength = ::ExpandEnvironmentStringsW(handlerCommand.get(),
L"", 0);
if (bufLength == 0) // Error
return PR_FALSE;
nsAutoArrayPtr<PRUnichar> destination(new PRUnichar[bufLength]);
if (!destination)
return PR_FALSE;
if (!::ExpandEnvironmentStringsW(handlerCommand.get(), destination,
bufLength))
return PR_FALSE;
handlerCommand = destination;
// Remove quotes around paths
handlerCommand.StripChars("\"");
// Strip windows host process bootstrap so we can get to the actual
// handler.
StripRundll32(handlerCommand);
// Trim any command parameters so that we have a native path we can
// initialize a local file with.
CleanupHandlerPath(handlerCommand);
aCommandHandler.Assign(handlerCommand);
return PR_TRUE;
}
// The "real" name of a given helper app (as specified by the path to the
// executable file held in various registry keys) is stored n the VERSIONINFO
// block in the file's resources. We need to find the path to the executable
// and then retrieve the "FileDescription" field value from the file.
nsresult
nsOSHelperAppService::GetDefaultAppInfo(const nsAString& aAppInfo,
nsAString& aDefaultDescription,
nsIFile** aDefaultApplication)
{
nsAutoString handlerCommand;
// If all else fails, use the file type key name, which will be
// something like "pngfile" for .pngs, "WMVFile" for .wmvs, etc.
aDefaultDescription = aAppInfo;
*aDefaultApplication = nsnull;
if (aAppInfo.IsEmpty())
return NS_ERROR_FAILURE;
// aAppInfo may be a file, file path, program id, or
// Applications reference -
// c:\dir\app.exe
// Applications\appfile.exe/dll (shell\open...)
// ProgID.progid (shell\open...)
nsAutoString handlerKeyName(aAppInfo);
nsCOMPtr<nsIWindowsRegKey> chkKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1");
if (!chkKey)
return NS_ERROR_FAILURE;
nsresult rv = chkKey->Open(nsIWindowsRegKey::ROOT_KEY_CLASSES_ROOT,
handlerKeyName,
nsIWindowsRegKey::ACCESS_QUERY_VALUE);
if (NS_FAILED(rv)) {
// It's a file system path to a handler
handlerCommand.Assign(aAppInfo);
}
else {
handlerKeyName.AppendLiteral("\\shell\\open\\command");
nsCOMPtr<nsIWindowsRegKey> regKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1");
if (!regKey)
return NS_ERROR_FAILURE;
nsresult rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CLASSES_ROOT,
handlerKeyName,
nsIWindowsRegKey::ACCESS_QUERY_VALUE);
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
// OK, the default value here is the description of the type.
rv = regKey->ReadStringValue(EmptyString(), handlerCommand);
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
}
if (!CleanupCmdHandlerPath(handlerCommand))
return NS_ERROR_FAILURE;
// XXX FIXME: If this fails, the UI will display the full command
// string.
// There are some rare cases this can happen - ["url.dll" -foo]
// for example won't resolve correctly to the system dir. The
// subsequent launch of the helper app will work though.
nsCOMPtr<nsILocalFile> lf;
NS_NewLocalFile(handlerCommand, PR_TRUE, getter_AddRefs(lf));
if (!lf)
return NS_ERROR_FILE_NOT_FOUND;
nsILocalFileWin* lfw = nsnull;
CallQueryInterface(lf, &lfw);
if (lfw) {
// The "FileDescription" field contains the actual name of the application.
lfw->GetVersionInfoField("FileDescription", aDefaultDescription);
// QI addref'ed for us.
*aDefaultApplication = lfw;
}
return NS_OK;
}
already_AddRefed<nsMIMEInfoWin> nsOSHelperAppService::GetByExtension(const nsAFlatString& aFileExt, const char *aTypeHint)
{
if (aFileExt.IsEmpty())
return nsnull;
// windows registry assumes your file extension is going to include the '.'.
// so make sure it's there...
nsAutoString fileExtToUse;
if (aFileExt.First() != PRUnichar('.'))
fileExtToUse = PRUnichar('.');
fileExtToUse.Append(aFileExt);
// Try to get an entry from the windows registry.
nsCOMPtr<nsIWindowsRegKey> regKey =
do_CreateInstance("@mozilla.org/windows-registry-key;1");
if (!regKey)
return nsnull;
nsresult rv = regKey->Open(nsIWindowsRegKey::ROOT_KEY_CLASSES_ROOT,
fileExtToUse,
nsIWindowsRegKey::ACCESS_QUERY_VALUE);
if (NS_FAILED(rv))
return nsnull;
nsCAutoString typeToUse;
if (aTypeHint && *aTypeHint) {
typeToUse.Assign(aTypeHint);
}
else {
nsAutoString temp;
if (NS_FAILED(regKey->ReadStringValue(NS_LITERAL_STRING("Content Type"),
temp)) || temp.IsEmpty()) {
return nsnull;
}
// Content-Type is always in ASCII
LossyAppendUTF16toASCII(temp, typeToUse);
}
nsMIMEInfoWin* mimeInfo = new nsMIMEInfoWin(typeToUse);
if (!mimeInfo)
return nsnull; // out of memory
NS_ADDREF(mimeInfo);
// don't append the '.'
mimeInfo->AppendExtension(NS_ConvertUTF16toUTF8(Substring(fileExtToUse, 1)));
mimeInfo->SetPreferredAction(nsIMIMEInfo::useSystemDefault);
nsAutoString appInfo;
PRBool found;
#if MOZ_WINSDK_TARGETVER >= MOZ_NTDDI_LONGHORN
// Retrieve the default application for this extension
if (mAppAssoc) {
// Vista: use the new application association COM interfaces
// for resolving helpers.
nsString assocType(fileExtToUse);
PRUnichar * pResult = nsnull;
HRESULT hr = mAppAssoc->QueryCurrentDefault(assocType.get(),
AT_FILEEXTENSION, AL_EFFECTIVE,
&pResult);
if (SUCCEEDED(hr)) {
found = PR_TRUE;
appInfo.Assign(pResult);
CoTaskMemFree(pResult);
}
else {
found = PR_FALSE;
}
}
else
#endif
{
found = NS_SUCCEEDED(regKey->ReadStringValue(EmptyString(),
appInfo));
}
// Bug 358297 - ignore the default handler, force the user to choose app
if (appInfo.EqualsLiteral("XPSViewer.Document"))
found = PR_FALSE;
if (!found) {
NS_IF_RELEASE(mimeInfo); // we failed to really find an entry in the registry
return nsnull;
}
// Get other nsIMIMEInfo fields from registry, if possible.
nsAutoString defaultDescription;
nsCOMPtr<nsIFile> defaultApplication;
if (NS_FAILED(GetDefaultAppInfo(appInfo, defaultDescription,
getter_AddRefs(defaultApplication)))) {
NS_IF_RELEASE(mimeInfo);
return nsnull;
}
mimeInfo->SetDefaultDescription(defaultDescription);
mimeInfo->SetDefaultApplicationHandler(defaultApplication);
// Grab the general description
GetMIMEInfoFromRegistry(appInfo, mimeInfo);
return mimeInfo;
}
already_AddRefed<nsIMIMEInfo> nsOSHelperAppService::GetMIMEInfoFromOS(const nsACString& aMIMEType, const nsACString& aFileExt, PRBool *aFound)
{
*aFound = PR_TRUE;
const nsCString& flatType = PromiseFlatCString(aMIMEType);
const nsCString& flatExt = PromiseFlatCString(aFileExt);
nsAutoString fileExtension;
/* XXX The Equals is a gross hack to wallpaper over the most common Win32
* extension issues caused by the fix for bug 116938. See bug
* 120327, comment 271 for why this is needed. Not even sure we
* want to remove this once we have fixed all this stuff to work
* right; any info we get from the OS on this type is pretty much
* useless....
* We'll do extension-based lookup for this type later in this function.
*/
if (!aMIMEType.LowerCaseEqualsLiteral(APPLICATION_OCTET_STREAM)) {
// (1) try to use the windows mime database to see if there is a mapping to a file extension
// (2) try to see if we have some left over 4.x registry info we can peek at...
GetExtensionFromWindowsMimeDatabase(aMIMEType, fileExtension);
LOG(("Windows mime database: extension '%s'\n", fileExtension.get()));
if (fileExtension.IsEmpty()) {
GetExtensionFrom4xRegistryInfo(aMIMEType, fileExtension);
LOG(("4.x Registry: extension '%s'\n", fileExtension.get()));
}
}
// If we found an extension for the type, do the lookup
nsMIMEInfoWin* mi = nsnull;
if (!fileExtension.IsEmpty())
mi = GetByExtension(fileExtension, flatType.get()).get();
LOG(("Extension lookup on '%s' found: 0x%p\n", fileExtension.get(), mi));
PRBool hasDefault = PR_FALSE;
if (mi) {
mi->GetHasDefaultHandler(&hasDefault);
// OK. We might have the case that |aFileExt| is a valid extension for the
// mimetype we were given. In that case, we do want to append aFileExt
// to the mimeinfo that we have. (E.g.: We are asked for video/mpeg and
// .mpg, but the primary extension for video/mpeg is .mpeg. But because
// .mpg is an extension for video/mpeg content, we want to append it)
if (!aFileExt.IsEmpty() && typeFromExtEquals(NS_ConvertUTF8toUTF16(flatExt).get(), flatType.get())) {
LOG(("Appending extension '%s' to mimeinfo, because its mimetype is '%s'\n",
flatExt.get(), flatType.get()));
PRBool extExist = PR_FALSE;
mi->ExtensionExists(aFileExt, &extExist);
if (!extExist)
mi->AppendExtension(aFileExt);
}
}
if (!mi || !hasDefault) {
nsRefPtr<nsMIMEInfoWin> miByExt =
GetByExtension(NS_ConvertUTF8toUTF16(aFileExt), flatType.get());
LOG(("Ext. lookup for '%s' found 0x%p\n", flatExt.get(), miByExt.get()));
if (!miByExt && mi)
return mi;
if (miByExt && !mi) {
miByExt.swap(mi);
return mi;
}
if (!miByExt && !mi) {
*aFound = PR_FALSE;
mi = new nsMIMEInfoWin(flatType);
if (mi) {
NS_ADDREF(mi);
if (!aFileExt.IsEmpty())
mi->AppendExtension(aFileExt);
}
return mi;
}
// if we get here, mi has no default app. copy from extension lookup.
nsCOMPtr<nsIFile> defaultApp;
nsAutoString desc;
miByExt->GetDefaultDescription(desc);
mi->SetDefaultDescription(desc);
}
return mi;
}
NS_IMETHODIMP
nsOSHelperAppService::GetProtocolHandlerInfoFromOS(const nsACString &aScheme,
PRBool *found,
nsIHandlerInfo **_retval)
{
NS_ASSERTION(!aScheme.IsEmpty(), "No scheme was specified!");
nsresult rv = OSProtocolHandlerExists(nsPromiseFlatCString(aScheme).get(),
found);
if (NS_FAILED(rv))
return rv;
nsMIMEInfoWin *handlerInfo =
new nsMIMEInfoWin(aScheme, nsMIMEInfoBase::eProtocolInfo);
NS_ENSURE_TRUE(handlerInfo, NS_ERROR_OUT_OF_MEMORY);
NS_ADDREF(*_retval = handlerInfo);
if (!*found) {
// Code that calls this requires an object regardless if the OS has
// something for us, so we return the empty object.
return NS_OK;
}
nsAutoString desc;
GetApplicationDescription(aScheme, desc);
handlerInfo->SetDefaultDescription(desc);
return NS_OK;
}
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