gecko-dev/uriloader/exthandler/nsMIMEInfoImpl.cpp

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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#include "nsMIMEInfoImpl.h"
#include "nsXPIDLString.h"
#include "nsReadableUtils.h"
#include "nsStringEnumerator.h"
#include "nsIProcess.h"

// nsISupports methods
NS_IMPL_THREADSAFE_ISUPPORTS1(nsMIMEInfoBase, nsIMIMEInfo)

// nsMIMEInfoImpl methods
nsMIMEInfoBase::nsMIMEInfoBase(const char *aMIMEType) :
    mMIMEType(aMIMEType),
    mPreferredAction(nsIMIMEInfo::saveToDisk),
    mAlwaysAskBeforeHandling(PR_TRUE)
{
}

nsMIMEInfoBase::nsMIMEInfoBase(const nsACString& aMIMEType) :
    mMIMEType(aMIMEType),
    mPreferredAction(nsIMIMEInfo::saveToDisk),
    mAlwaysAskBeforeHandling(PR_TRUE)
{
}

nsMIMEInfoBase::~nsMIMEInfoBase()
{
}

NS_IMETHODIMP
nsMIMEInfoBase::GetFileExtensions(nsIUTF8StringEnumerator** aResult)
{
  return NS_NewUTF8StringEnumerator(aResult, &mExtensions, this);
}

NS_IMETHODIMP
nsMIMEInfoBase::ExtensionExists(const nsACString& aExtension, PRBool *_retval)
{
    NS_ASSERTION(!aExtension.IsEmpty(), "no extension");
    PRBool found = PR_FALSE;
    PRUint32 extCount = mExtensions.Count();
    if (extCount < 1) return NS_OK;

    for (PRUint8 i=0; i < extCount; i++) {
        nsCString* ext = (nsCString*)mExtensions.CStringAt(i);
        if (ext->Equals(aExtension, nsCaseInsensitiveCStringComparator())) {
            found = PR_TRUE;
            break;
        }
    }

    *_retval = found;
    return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::GetPrimaryExtension(nsACString& _retval)
{
    PRUint32 extCount = mExtensions.Count();
    if (extCount < 1) return NS_ERROR_NOT_INITIALIZED;

    _retval = *(mExtensions.CStringAt(0));
    return NS_OK;    
}

NS_IMETHODIMP
nsMIMEInfoBase::SetPrimaryExtension(const nsACString& aExtension)
{
  NS_ASSERTION(!aExtension.IsEmpty(), "no extension");
  PRUint32 extCount = mExtensions.Count();
  PRUint8 i;
  PRBool found = PR_FALSE;
  for (i=0; i < extCount; i++) {
    nsCString* ext = (nsCString*)mExtensions.CStringAt(i);
    if (ext->Equals(aExtension, nsCaseInsensitiveCStringComparator())) {
      found = PR_TRUE;
      break;
    }
  }
  if (found) {
    mExtensions.RemoveCStringAt(i);
  }

  mExtensions.InsertCStringAt(aExtension, 0);
  
  return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::AppendExtension(const nsACString& aExtension)
{
  mExtensions.AppendCString(aExtension);
  return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::GetMIMEType(nsACString& aMIMEType)
{
    if (mMIMEType.IsEmpty())
        return NS_ERROR_NOT_INITIALIZED;

    aMIMEType = mMIMEType;
    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, PRBool *_retval)
{
    if (!aMIMEInfo) return NS_ERROR_NULL_POINTER;

    nsCAutoString type;
    nsresult rv = aMIMEInfo->GetMIMEType(type);
    if (NS_FAILED(rv)) return rv;

    *_retval = mMIMEType.Equals(type);

    return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::GetMacType(PRUint32 *aMacType)
{
    *aMacType = mMacType;
    return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::SetMacType(PRUint32 aMacType)
{
    mMacType = aMacType;
    return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::GetMacCreator(PRUint32 *aMacCreator)
{
    *aMacCreator = mMacCreator;
    return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::SetMacCreator(PRUint32 aMacCreator)
{
    mMacCreator = aMacCreator;
    return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::SetFileExtensions(const nsACString& aExtensions)
{
    mExtensions.Clear();
    nsCString extList( aExtensions );
    
    PRInt32 breakLocation = -1;
    while ( (breakLocation= extList.FindChar(',') )!= -1)
    {
        mExtensions.AppendCString(Substring(extList.get(), extList.get() + breakLocation));
        extList.Cut(0, breakLocation+1 );
    }
    if ( !extList.IsEmpty() )
        mExtensions.AppendCString( extList );
    return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::GetApplicationDescription(nsAString& aApplicationDescription)
{
  if (mPreferredAppDescription.IsEmpty() && mPreferredApplication) {
    // Don't want to cache this, just in case someone resets the app
    // without changing the description....
    mPreferredApplication->GetLeafName(aApplicationDescription);
  } else {
    aApplicationDescription = mPreferredAppDescription;
  }
  
  return NS_OK;
}
 
NS_IMETHODIMP
nsMIMEInfoBase::SetApplicationDescription(const nsAString& aApplicationDescription)
{
  mPreferredAppDescription = aApplicationDescription;
  return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::GetDefaultDescription(nsAString& aDefaultDescription)
{
  aDefaultDescription = mDefaultAppDescription;
  return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::GetPreferredApplicationHandler(nsIFile ** aPreferredAppHandler)
{
  *aPreferredAppHandler = mPreferredApplication;
  NS_IF_ADDREF(*aPreferredAppHandler);
  return NS_OK;
}
 
NS_IMETHODIMP
nsMIMEInfoBase::SetPreferredApplicationHandler(nsIFile * aPreferredAppHandler)
{
  mPreferredApplication = aPreferredAppHandler;
  return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::GetPreferredAction(nsMIMEInfoHandleAction * aPreferredAction)
{
  *aPreferredAction = mPreferredAction;
  return NS_OK;
}
 
NS_IMETHODIMP
nsMIMEInfoBase::SetPreferredAction(nsMIMEInfoHandleAction aPreferredAction)
{
  mPreferredAction = aPreferredAction;
  return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::GetAlwaysAskBeforeHandling(PRBool * aAlwaysAsk)
{
  *aAlwaysAsk = mAlwaysAskBeforeHandling;

  return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::SetAlwaysAskBeforeHandling(PRBool aAlwaysAsk)
{
  mAlwaysAskBeforeHandling = aAlwaysAsk;
  return NS_OK;
}

NS_IMETHODIMP
nsMIMEInfoBase::LaunchWithFile(nsIFile* aFile)
{
  if (mPreferredAction == useHelperApp) {
    if (!mPreferredApplication)
      return NS_ERROR_FILE_NOT_FOUND;

    return LaunchWithIProcess(mPreferredApplication, aFile);
  }
  else if (mPreferredAction == useSystemDefault) {
    return LaunchDefaultWithFile(aFile);
  }

  return NS_ERROR_INVALID_ARG;
}

void
nsMIMEInfoBase::CopyBasicDataTo(nsMIMEInfoBase* aOther)
{
  aOther->mMIMEType = mMIMEType;
  aOther->mDefaultAppDescription = mDefaultAppDescription;
  aOther->mExtensions = mExtensions;

  aOther->mMacType = mMacType;
  aOther->mMacCreator = mMacCreator;
}

/* static */
nsresult
nsMIMEInfoBase::LaunchWithIProcess(nsIFile* aApp, nsIFile* aFile)
{
  NS_ASSERTION(aApp && aFile, "Unexpected null pointer, fix caller");

  nsresult rv;
  nsCOMPtr<nsIProcess> process = do_CreateInstance(NS_PROCESS_CONTRACTID, &rv);
  if (NS_FAILED(rv))
    return rv;

  if (NS_FAILED(rv = process->Init(aApp)))
    return rv;

  nsCAutoString path;
  aFile->GetNativePath(path);

  const char * strPath = path.get();

  PRUint32 pid;
  return process->Run(PR_FALSE, &strPath, 1, &pid);
}

// 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(PRBool * _retval)
{
  *_retval = PR_FALSE;
  if (mDefaultApplication) {
    PRBool exists;
    *_retval = NS_SUCCEEDED(mDefaultApplication->Exists(&exists)) && exists;
  }
  return NS_OK;
}

nsresult
nsMIMEInfoImpl::LaunchDefaultWithFile(nsIFile* aFile)
{
  if (!mDefaultApplication)
    return NS_ERROR_FILE_NOT_FOUND;

  return LaunchWithIProcess(mDefaultApplication, aFile);
}