Mac Dev Center Mac OS X Reference Library Drivers, Kernel, & Hardware: User-Space Device Access Disc Recording Framework Reference

Overview

Interface to folder objects used in filesystem creation.

Functions

DRFolderAddChild

Adds a file or folder object reference as a child of a virtual folder object.

This function applies only to virtual folders. Real folders are considered "leaf nodes" and cannot have children.

DRFolderConvertRealToVirtual

Converts a real folder to a virtual folder. Conversion happens in-place so there is no need to release or reallocate any objects.

DRFolderCopyChildren

Obtains an array containing the children of a virtual folder.

DRFolderCountChildren

Obtains the number of children of a virtual folder.

DRFolderCreateReal

Creates a new real folder object corresponding to a given FSRef object.

DRFolderCreateRealWithURL

Creates a new real folder object corresponding to a given file URL.

DRFolderCreateVirtual

Creates a new, empty virtual folder object.

DRFolderGetTypeID

Returns the type identifier of all DRFolder instances.

DRFolderRemoveChild

Removes a file or folder object reference so a file or folder is no longer a child of the specified folder object.

This function applies only to virtual folders. Real folders are considered "leaf nodes" and cannot have children.

Adds a file or folder object reference as a child of a virtual folder object.

This function applies only to virtual folders. Real folders are considered "leaf nodes" and cannot have children.

extern void DRFolderAddChild( 
    DRFolderRef parent, 
    DRFSObjectRef newChild) ;  

Parameters

Availability

Introduced in Mac OS X v10.2

Converts a real folder to a virtual folder. Conversion happens in-place so there is no need to release or reallocate any objects.

extern void DRFolderConvertRealToVirtual( 
    DRFolderRef realFolder) ;  

Parameters

Discussion

The virtual folder created in this way is a snapshot of the on-disk folder at the moment of the call. The newly-created virtual folder will contain real folder and file objects corresponding to the on-disk children of the original on-disk folder.

If the on-disk folder attributes change, or if children are added to or removed from the on-disk tree during this call, the virtual folder may or may not reflect the changes. It the on-disk attributes change after this call, the virtual folder will not reflect the changes.

Availability

Introduced in Mac OS X v10.2

Obtains an array containing the children of a virtual folder.

extern CFArrayRef DRFolderCopyChildren( 
    const DRFolderRef folder) ;  

Parameters

Return Value

Returns a CFArray object containing the virtual folder's children.

Discussion

The order of the children in the array is arbitrary; the various files systems being generated for a burn may have different sorting requirements, so there is no one definitive sort order. The ordering will change only when children are added or removed.

Your application should sort the children consistently and according to the needs of your user interface.

This function applies only to virtual folders. Real folders are considered "leaf nodes" and should not be passed to this call.

Availability

Introduced in Mac OS X v10.2

Obtains the number of children of a virtual folder.

extern UInt32 DRFolderCountChildren( 
    const DRFolderRef folder) ;  

Parameters

Return Value

Returns the number of children.

Discussion

This function applies only to virtual folders. Real folders are considered "leaf nodes" and should not be passed to this call.

Availability

Introduced in Mac OS X v10.2

Creates a new real folder object corresponding to a given FSRef object.

extern DRFolderRef DRFolderCreateReal( 
    const FSRef * fsRef) ;  

Parameters

Return Value

Returns a reference to the newly-created folder object, or NULL.

Discussion

A real folder object is a folder object corresponding to a real folder on disk. The content of the folder object corresponds to the actual on-disk content of the folder. Items cannot be programatically added to or removed from a real folder object without making it virtual first -- see DRFolderConvertRealToVirtual.

Availability

Introduced in Mac OS X v10.2

Creates a new real folder object corresponding to a given file URL.

extern DRFolderRef DRFolderCreateRealWithURL( 
    const CFURLRef urlRef) ;  

Parameters

Return Value

Returns a reference to the newly-created folder object, or NULL.

Discussion

A real folder object is a folder object corresponding to a real folder on disk. The contents of the folder object corresponds to the actual on-disk contents of the folder. Items cannot be programatically added to or removed from a real folder object without making it virtual first -- see DRFolderConvertRealToVirtual.

Availability

Introduced in Mac OS X v10.2

Creates a new, empty virtual folder object.

extern DRFolderRef DRFolderCreateVirtual( 
    CFStringRef baseName) ;  

Parameters

Return Value

Returns a reference to the newly-created virtual folder object, or NULL.

Discussion

A virtual folder object is a folder object which does not correspond to any real folder on disk, but represents a folder you want to appear in the file structure of the disc you are burning. It is created and modified using Disc Recording's 'content' functions -- see the documentation for DRContentObject.h.

Availability

Introduced in Mac OS X v10.2

Returns the type identifier of all DRFolder instances.

extern CFTypeID DRFolderGetTypeID(
    void) ;  

Availability

Introduced in Mac OS X v10.2

Removes a file or folder object reference so a file or folder is no longer a child of the specified folder object.

This function applies only to virtual folders. Real folders are considered "leaf nodes" and cannot have children.

extern void DRFolderRemoveChild( 
    DRFolderRef parent, 
    DRFSObjectRef child) ;  

Parameters

Availability

Introduced in Mac OS X v10.2