// Given an application bundle reference and the name of an icon file
// which is a resource in that bundle, look up the full (posix style)
// path to that icon. Returns the path, or an empty wxString on failure
wxString GetPathForIconFile( CFBundleRef bundle, CFStringRef iconFile )
{
// If either parameter is NULL there is no hope of success
if( !bundle || !iconFile )
return wxEmptyString;
// Create a range object representing the whole string
CFRange wholeString;
wholeString.location = 0;
wholeString.length = CFStringGetLength( iconFile );
// Index of the period in the file name for iconFile
UniCharCount periodIndex;
// In order to locate the period delimiting the extension,
// iconFile must be represented as UniChar[]
{
// Allocate a buffer and copy in the iconFile string
UniChar* buffer = new UniChar[ wholeString.length ];
CFStringGetCharacters( iconFile, wholeString, buffer );
// Locate the period character
OSStatus status = LSGetExtensionInfo( wholeString.length, buffer, &periodIndex );
// Deallocate the buffer
delete [] buffer;
// If the period could not be located it will not be possible to get the URL
if( status != noErr || periodIndex == kLSInvalidExtensionIndex )
return wxEmptyString;
}
// Range representing the name part of iconFile
CFRange iconNameRange;
iconNameRange.location = 0;
iconNameRange.length = periodIndex - 1;
// Range representing the extension part of iconFile
CFRange iconExtRange;
iconExtRange.location = periodIndex;
iconExtRange.length = wholeString.length - periodIndex;
// Get the name and extension strings
wxCFStringRef iconName = CFStringCreateWithSubstring( kCFAllocatorDefault, iconFile, iconNameRange );
wxCFStringRef iconExt = CFStringCreateWithSubstring( kCFAllocatorDefault, iconFile, iconExtRange );
// Now it is possible to query the URL for the icon as a resource
wxCFRef< CFURLRef > iconUrl = wxCFRef< CFURLRef >( CFBundleCopyResourceURL( bundle, iconName, iconExt, NULL ) );
if( !iconUrl.get() )
return wxEmptyString;
// All being well, return the icon path
return wxCFStringRef( CFURLCopyFileSystemPath( iconUrl, kCFURLPOSIXPathStyle ) ).AsString();
}
static PyObject *Launch_LSGetExtensionInfo(PyObject *_self, PyObject *_args)
{
PyObject *_res = NULL;
OSStatus _err;
UniChar *inNameLen__in__;
UniCharCount inNameLen__len__;
int inNameLen__in_len__;
UniCharCount outExtStartIndex;
if (!PyArg_ParseTuple(_args, "u#",
&inNameLen__in__, &inNameLen__in_len__))
return NULL;
inNameLen__len__ = inNameLen__in_len__;
_err = LSGetExtensionInfo(inNameLen__len__, inNameLen__in__,
&outExtStartIndex);
if (_err != noErr) return PyMac_Error(_err);
_res = Py_BuildValue("l",
outExtStartIndex);
return _res;
}
CFStringRef HLFileSystemObject::CopyNameExtension() const
{
// get the file name from the catalog info
HFSUniStr255 theUniStr255;
OSStatus theError = FSGetCatalogInfo(&mFSRef, kFSCatInfoNone, NULL, &theUniStr255, NULL, NULL);
ThrowIfError(theError, CAException(theError), "HLFileSystemObject::CopyNameExtension: couldn't get the catalog information");
// use Launch Services to find the start of the extension
UniCharCount theExtensionStart = 0;
LSGetExtensionInfo(theUniStr255.length, theUniStr255.unicode, &theExtensionStart);
// assume that there wasn't an extension
CFStringRef theExtension = NULL;
if(theExtensionStart != kLSInvalidExtensionIndex)
{
// but there was, so make a CFString out of it
theExtension = CFStringCreateWithCharacters(NULL, &theUniStr255.unicode[theExtensionStart], theUniStr255.length - theExtensionStart);
}
return theExtension;
}
void HLFileSystemObject::SetNameExtension(CFStringRef inNameExtension)
{
// the FSRef for a file can change after renaming,
// so don't allow it to be done while the file is open
ThrowIf(IsOpenForReading() || IsOpenForWriting(), CAException(fBsyErr), "HLFileSystemObject::SetNameExtension: can't change the file name extension of an open file");
// make a raw unicode string out of the CFString containing the new extension
CACFString theExtension(inNameExtension, false);
UInt32 theExtensionLength = 255;
UniChar theExtensionString[255];
theExtension.GetUnicodeString(theExtensionString, theExtensionLength);
// get the file name from the catalog info
HFSUniStr255 theNameString;
OSStatus theError = FSGetCatalogInfo(&mFSRef, kFSCatInfoNone, NULL, &theNameString, NULL, NULL);
ThrowIfError(theError, CAException(theError), "HLFileSystemObject::SetNameExtension: couldn't get the catalog information");
// use Launch Services to find the start of the extension
UniCharCount theExtensionStart = 0;
LSGetExtensionInfo(theNameString.length, theNameString.unicode, &theExtensionStart);
UInt32 theCharsToCopy;
if(theExtensionStart != kLSInvalidExtensionIndex)
{
// there already was an extension, so replace it
// figure out how many characters worth of extension can fit
theCharsToCopy = 255UL - theExtensionStart;
// range it against the actual length of the extension
theCharsToCopy = theExtensionLength < theCharsToCopy ? theExtensionLength : theCharsToCopy;
// copy the extension
memcpy(&theNameString.unicode[theExtensionStart], theExtensionString, theCharsToCopy * sizeof(UniChar));
// update the length of the name string
theNameString.length = theExtensionStart + theCharsToCopy;
// save off the current FSRef, since it may change
FSRef theOldFSRef;
memcpy(&theOldFSRef, &mFSRef, sizeof(FSRef));
// rename the file, getting us the new FSRef
theError = FSRenameUnicode(&theOldFSRef, theNameString.length, theNameString.unicode, kTextEncodingUnknown, &mFSRef);
ThrowIfError(theError, CAException(theError), "HLFileSystemObject::SetName: couldn't rename the file");
}
else if(theNameString.length < 254)
{
// there isn't an extension yet, and there's room for at least two characters
// make a raw unicode string with the period
CFRange thePeriodRange = { 0, 1 };
UniChar thePeriodString[255];
CFStringGetCharacters(HLFileSystemCFStringConstants::sNameExtensionDelimiter, thePeriodRange, thePeriodString);
// copy it at the end of the string
theNameString.unicode[theNameString.length] = thePeriodString[0];
// update the length
theNameString.length += 1;
// figure out how many characters worth of extension can fit
theCharsToCopy = 255UL - theNameString.length;
// range it against the actual length of the extension
theCharsToCopy = theExtensionLength < theCharsToCopy ? theExtensionLength : theCharsToCopy;
// copy the extension
memcpy(&theNameString.unicode[theNameString.length], theExtensionString, theCharsToCopy * sizeof(UniChar));
// update the length of the name string
theNameString.length += theCharsToCopy;
// save off the current FSRef, since it may change
FSRef theOldFSRef;
memcpy(&theOldFSRef, &mFSRef, sizeof(FSRef));
// rename the file, getting us the new FSRef
theError = FSRenameUnicode(&theOldFSRef, theNameString.length, theNameString.unicode, kTextEncodingUnknown, &mFSRef);
ThrowIfError(theError, CAException(theError), "HLFileSystemObject::SetName: couldn't rename the file");
}
}
