gecko/uriloader/exthandler/nsMIMEInfoImpl.cpp
2012-05-21 12:12:37 +01:00

432 lines
11 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsMIMEInfoImpl.h"
#include "nsXPIDLString.h"
#include "nsReadableUtils.h"
#include "nsStringEnumerator.h"
#include "nsILocalFile.h"
#include "nsIFileURL.h"
#include "nsEscape.h"
#include "nsNetUtil.h"
#include "nsIURILoader.h"
#include "nsCURILoader.h"
// nsISupports methods
NS_IMPL_THREADSAFE_ADDREF(nsMIMEInfoBase)
NS_IMPL_THREADSAFE_RELEASE(nsMIMEInfoBase)
NS_INTERFACE_MAP_BEGIN(nsMIMEInfoBase)
NS_INTERFACE_MAP_ENTRY(nsIHandlerInfo)
// This is only an nsIMIMEInfo if it's a MIME handler.
NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIMIMEInfo, mClass == eMIMEInfo)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIHandlerInfo)
NS_INTERFACE_MAP_END_THREADSAFE
// nsMIMEInfoImpl methods
// Constructors for a MIME handler.
nsMIMEInfoBase::nsMIMEInfoBase(const char *aMIMEType) :
mSchemeOrType(aMIMEType),
mClass(eMIMEInfo),
mPreferredAction(nsIMIMEInfo::saveToDisk),
mAlwaysAskBeforeHandling(true)
{
}
nsMIMEInfoBase::nsMIMEInfoBase(const nsACString& aMIMEType) :
mSchemeOrType(aMIMEType),
mClass(eMIMEInfo),
mPreferredAction(nsIMIMEInfo::saveToDisk),
mAlwaysAskBeforeHandling(true)
{
}
// Constructor for a handler that lets the caller specify whether this is a
// MIME handler or a protocol handler. In the long run, these will be distinct
// classes (f.e. nsMIMEInfo and nsProtocolInfo), but for now we reuse this class
// for both and distinguish between the two kinds of handlers via the aClass
// argument to this method, which can be either eMIMEInfo or eProtocolInfo.
nsMIMEInfoBase::nsMIMEInfoBase(const nsACString& aType, HandlerClass aClass) :
mSchemeOrType(aType),
mClass(aClass),
mPreferredAction(nsIMIMEInfo::saveToDisk),
mAlwaysAskBeforeHandling(true)
{
}
nsMIMEInfoBase::~nsMIMEInfoBase()
{
}
NS_IMETHODIMP
nsMIMEInfoBase::GetFileExtensions(nsIUTF8StringEnumerator** aResult)
{
return NS_NewUTF8StringEnumerator(aResult, &mExtensions, this);
}
NS_IMETHODIMP
nsMIMEInfoBase::ExtensionExists(const nsACString& aExtension, bool *_retval)
{
NS_ASSERTION(!aExtension.IsEmpty(), "no extension");
bool found = false;
PRUint32 extCount = mExtensions.Length();
if (extCount < 1) return NS_OK;
for (PRUint8 i=0; i < extCount; i++) {
const nsCString& ext = mExtensions[i];
if (ext.Equals(aExtension, nsCaseInsensitiveCStringComparator())) {
found = true;
break;
}
}
*_retval = found;
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::GetPrimaryExtension(nsACString& _retval)
{
if (!mExtensions.Length())
return NS_ERROR_NOT_INITIALIZED;
_retval = mExtensions[0];
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::SetPrimaryExtension(const nsACString& aExtension)
{
NS_ASSERTION(!aExtension.IsEmpty(), "no extension");
PRUint32 extCount = mExtensions.Length();
PRUint8 i;
bool found = false;
for (i=0; i < extCount; i++) {
const nsCString& ext = mExtensions[i];
if (ext.Equals(aExtension, nsCaseInsensitiveCStringComparator())) {
found = true;
break;
}
}
if (found) {
mExtensions.RemoveElementAt(i);
}
mExtensions.InsertElementAt(0, aExtension);
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::AppendExtension(const nsACString& aExtension)
{
mExtensions.AppendElement(aExtension);
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::GetType(nsACString& aType)
{
if (mSchemeOrType.IsEmpty())
return NS_ERROR_NOT_INITIALIZED;
aType = mSchemeOrType;
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::GetMIMEType(nsACString& aMIMEType)
{
if (mSchemeOrType.IsEmpty())
return NS_ERROR_NOT_INITIALIZED;
aMIMEType = mSchemeOrType;
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::GetDescription(nsAString& aDescription)
{
aDescription = mDescription;
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::SetDescription(const nsAString& aDescription)
{
mDescription = aDescription;
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::Equals(nsIMIMEInfo *aMIMEInfo, bool *_retval)
{
if (!aMIMEInfo) return NS_ERROR_NULL_POINTER;
nsCAutoString type;
nsresult rv = aMIMEInfo->GetMIMEType(type);
if (NS_FAILED(rv)) return rv;
*_retval = mSchemeOrType.Equals(type);
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::SetFileExtensions(const nsACString& aExtensions)
{
mExtensions.Clear();
nsCString extList( aExtensions );
PRInt32 breakLocation = -1;
while ( (breakLocation= extList.FindChar(',') )!= -1)
{
mExtensions.AppendElement(Substring(extList.get(), extList.get() + breakLocation));
extList.Cut(0, breakLocation+1 );
}
if ( !extList.IsEmpty() )
mExtensions.AppendElement( extList );
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::GetDefaultDescription(nsAString& aDefaultDescription)
{
aDefaultDescription = mDefaultAppDescription;
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::GetPreferredApplicationHandler(nsIHandlerApp ** aPreferredAppHandler)
{
*aPreferredAppHandler = mPreferredApplication;
NS_IF_ADDREF(*aPreferredAppHandler);
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::SetPreferredApplicationHandler(nsIHandlerApp * aPreferredAppHandler)
{
mPreferredApplication = aPreferredAppHandler;
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::GetPossibleApplicationHandlers(nsIMutableArray ** aPossibleAppHandlers)
{
if (!mPossibleApplications)
mPossibleApplications = do_CreateInstance(NS_ARRAY_CONTRACTID);
if (!mPossibleApplications)
return NS_ERROR_OUT_OF_MEMORY;
*aPossibleAppHandlers = mPossibleApplications;
NS_IF_ADDREF(*aPossibleAppHandlers);
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::GetPreferredAction(nsHandlerInfoAction * aPreferredAction)
{
*aPreferredAction = mPreferredAction;
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::SetPreferredAction(nsHandlerInfoAction aPreferredAction)
{
mPreferredAction = aPreferredAction;
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::GetAlwaysAskBeforeHandling(bool * aAlwaysAsk)
{
*aAlwaysAsk = mAlwaysAskBeforeHandling;
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoBase::SetAlwaysAskBeforeHandling(bool aAlwaysAsk)
{
mAlwaysAskBeforeHandling = aAlwaysAsk;
return NS_OK;
}
/* static */
nsresult
nsMIMEInfoBase::GetLocalFileFromURI(nsIURI *aURI, nsILocalFile **aFile)
{
nsresult rv;
nsCOMPtr<nsIFileURL> fileUrl = do_QueryInterface(aURI, &rv);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIFile> file;
rv = fileUrl->GetFile(getter_AddRefs(file));
if (NS_FAILED(rv)) return rv;
return CallQueryInterface(file, aFile);
}
NS_IMETHODIMP
nsMIMEInfoBase::LaunchWithFile(nsIFile* aFile)
{
nsresult rv;
// it doesn't make any sense to call this on protocol handlers
NS_ASSERTION(mClass == eMIMEInfo,
"nsMIMEInfoBase should have mClass == eMIMEInfo");
if (mPreferredAction == useSystemDefault) {
return LaunchDefaultWithFile(aFile);
}
if (mPreferredAction == useHelperApp) {
if (!mPreferredApplication)
return NS_ERROR_FILE_NOT_FOUND;
// at the moment, we only know how to hand files off to local handlers
nsCOMPtr<nsILocalHandlerApp> localHandler =
do_QueryInterface(mPreferredApplication, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIFile> executable;
rv = localHandler->GetExecutable(getter_AddRefs(executable));
NS_ENSURE_SUCCESS(rv, rv);
nsCAutoString path;
aFile->GetNativePath(path);
return LaunchWithIProcess(executable, path);
}
return NS_ERROR_INVALID_ARG;
}
NS_IMETHODIMP
nsMIMEInfoBase::LaunchWithURI(nsIURI* aURI,
nsIInterfaceRequestor* aWindowContext)
{
// for now, this is only being called with protocol handlers; that
// will change once we get to more general registerContentHandler
// support
NS_ASSERTION(mClass == eProtocolInfo,
"nsMIMEInfoBase should be a protocol handler");
if (mPreferredAction == useSystemDefault) {
return LoadUriInternal(aURI);
}
if (mPreferredAction == useHelperApp) {
if (!mPreferredApplication)
return NS_ERROR_FILE_NOT_FOUND;
return mPreferredApplication->LaunchWithURI(aURI, aWindowContext);
}
return NS_ERROR_INVALID_ARG;
}
void
nsMIMEInfoBase::CopyBasicDataTo(nsMIMEInfoBase* aOther)
{
aOther->mSchemeOrType = mSchemeOrType;
aOther->mDefaultAppDescription = mDefaultAppDescription;
aOther->mExtensions = mExtensions;
}
/* static */
already_AddRefed<nsIProcess>
nsMIMEInfoBase::InitProcess(nsIFile* aApp, nsresult* aResult)
{
NS_ASSERTION(aApp, "Unexpected null pointer, fix caller");
nsCOMPtr<nsIProcess> process = do_CreateInstance(NS_PROCESS_CONTRACTID,
aResult);
if (NS_FAILED(*aResult))
return nsnull;
*aResult = process->Init(aApp);
if (NS_FAILED(*aResult))
return nsnull;
return process.forget();
}
/* static */
nsresult
nsMIMEInfoBase::LaunchWithIProcess(nsIFile* aApp, const nsCString& aArg)
{
nsresult rv;
nsCOMPtr<nsIProcess> process = InitProcess(aApp, &rv);
if (NS_FAILED(rv))
return rv;
const char *string = aArg.get();
return process->Run(false, &string, 1);
}
/* static */
nsresult
nsMIMEInfoBase::LaunchWithIProcess(nsIFile* aApp, const nsString& aArg)
{
nsresult rv;
nsCOMPtr<nsIProcess> process = InitProcess(aApp, &rv);
if (NS_FAILED(rv))
return rv;
const PRUnichar *string = aArg.get();
return process->Runw(false, &string, 1);
}
// nsMIMEInfoImpl implementation
NS_IMETHODIMP
nsMIMEInfoImpl::GetDefaultDescription(nsAString& aDefaultDescription)
{
if (mDefaultAppDescription.IsEmpty() && mDefaultApplication) {
// Don't want to cache this, just in case someone resets the app
// without changing the description....
mDefaultApplication->GetLeafName(aDefaultDescription);
} else {
aDefaultDescription = mDefaultAppDescription;
}
return NS_OK;
}
NS_IMETHODIMP
nsMIMEInfoImpl::GetHasDefaultHandler(bool * _retval)
{
*_retval = !mDefaultAppDescription.IsEmpty();
if (mDefaultApplication) {
bool exists;
*_retval = NS_SUCCEEDED(mDefaultApplication->Exists(&exists)) && exists;
}
return NS_OK;
}
nsresult
nsMIMEInfoImpl::LaunchDefaultWithFile(nsIFile* aFile)
{
if (!mDefaultApplication)
return NS_ERROR_FILE_NOT_FOUND;
nsCAutoString nativePath;
aFile->GetNativePath(nativePath);
return LaunchWithIProcess(mDefaultApplication, nativePath);
}
NS_IMETHODIMP
nsMIMEInfoBase::GetPossibleLocalHandlers(nsIArray **_retval)
{
return NS_ERROR_NOT_IMPLEMENTED;
}