AccessibleStreamableContent Interface

AccessibleStreamableContent Interface

Synopsis

enum                AccessibleStreamableContentSeekType;
void                AccessibleStreamableContent_freeContentTypesList
                                                        (AccessibleStreamableContent *obj,
                                                         char **content_types);
void                AccessibleStreamableContent_ref     (AccessibleStreamableContent *obj);
void                AccessibleStreamableContent_unref   (AccessibleStreamableContent *obj);
char **             AccessibleStreamableContent_getContentTypes
                                                        (AccessibleStreamableContent *obj);
SPIBoolean          AccessibleStreamableContent_open    (AccessibleStreamableContent *obj,
                                                         const char *content_type);
long                AccessibleStreamableContent_seek    (AccessibleStreamableContent *obj,
                                                         long int offset,
                                                         AccessibleStreamableContentSeekType seek_type);
SPIBoolean          AccessibleStreamableContent_read    (AccessibleStreamableContent *obj,
                                                         void *buff,
                                                         long int nbytes,
                                                         unsigned int read_type);
SPIBoolean          AccessibleStreamableContent_close   (AccessibleStreamableContent *obj);

Description

Details

enum AccessibleStreamableContentSeekType

typedef enum
{
  SPI_STREAM_SEEK_SET,
  SPI_STREAM_SEEK_CUR,
  SPI_STREAM_SEEK_END
} AccessibleStreamableContentSeekType;

The seek type for a specified offset in AccessibleStreamableContent_seek.

SPI_STREAM_SEEK_SET

seek from the 'top' of the streamable

SPI_STREAM_SEEK_CUR

seek from the current position in the stream

SPI_STREAM_SEEK_END

seek from the end of the stream (if known)

AccessibleStreamableContent_freeContentTypesList ()

void                AccessibleStreamableContent_freeContentTypesList
                                                        (AccessibleStreamableContent *obj,
                                                         char **content_types);

Free the memory associated with a call to AccessibleStreamableContent_getContentTypes, once the result has been used.

obj :

the AccessibleStreamableContent implementor on which to operate.

content_types :

a list of content types previously returned by AccessibleStreamableContent_getContentTypes.

Since AT-SPI 1.4


AccessibleStreamableContent_ref ()

void                AccessibleStreamableContent_ref     (AccessibleStreamableContent *obj);

Increment the reference count for an AccessibleStreamableContent object.

Since: AT-SPI 1.4

obj :

a pointer to the AccessibleStreamableContent implementor on which to operate.

AccessibleStreamableContent_unref ()

void                AccessibleStreamableContent_unref   (AccessibleStreamableContent *obj);

Decrement the reference count for an AccessibleStreamableContent object.

Since: AT-SPI 1.4

obj :

a pointer to the AccessibleStreamableContent implementor on which to operate.

AccessibleStreamableContent_getContentTypes ()

char **             AccessibleStreamableContent_getContentTypes
                                                        (AccessibleStreamableContent *obj);

Get a list of strings containing the content mimetypes available from an AccessibleStreamableContent implementor.

Since: AT-SPI 1.4

obj :

a pointer to the AccessibleStreamableContent implementor on which to operate.

Returns :

an array of strings, terminated by a NULL string, specifying the mimetypes for which the streamed content is available.

AccessibleStreamableContent_open ()

SPIBoolean          AccessibleStreamableContent_open    (AccessibleStreamableContent *obj,
                                                         const char *content_type);

Open a streaming connection to an AccessibleStreamableContent implementor, of a particular content type. Note that a client may only have one open stream per streamable interface instance in the current implementation.

Since: AT-SPI 1.4

obj :

a pointer to the AccessibleStreamableContent implementor on which to operate.

content_type :

a string specifying the content type to retrieve (should match one of the return strings from #AccessibleStreamableContent_getContentTypes()).

Returns :

TRUE if successful, FALSE if unsuccessful.

AccessibleStreamableContent_seek ()

long                AccessibleStreamableContent_seek    (AccessibleStreamableContent *obj,
                                                         long int offset,
                                                         AccessibleStreamableContentSeekType seek_type);

Cause the current streamable content connection (obtained via #AccessibleStreamableContent_open()) to seek to a particular offset in the stream.

Since: AT-SPI 1.4

obj :

a pointer to the AccessibleStreamableContent implementor on which to operate.

offset :

a long int specifying the offset into the stream.

seek_type :

an enum indicating the seek offset type, may be SEEK_SET, SEEK_CUR, SEEK_END (as in the lseek() libc command).

Returns :

TRUE if successful, FALSE if unsuccessful.

AccessibleStreamableContent_read ()

SPIBoolean          AccessibleStreamableContent_read    (AccessibleStreamableContent *obj,
                                                         void *buff,
                                                         long int nbytes,
                                                         unsigned int read_type);

Copy (read) bytes from the currently open streamable content connection to a buffer. This is a blocking API, in the sense that it does not return until the bytes have been read, or an error condition is detected.

Since: AT-SPI 1.4

obj :

a pointer to the AccessibleStreamableContent implementor on which to operate.

buff :

a pointer to a buffer into which the resulting bytes read from the stream are to be written.

nbytes :

a long integer indicating the number of bytes to read/write.

read_type :

currently unused, specifies behavior of reads for streamed content if blocking is not allowed, etc.

Returns :

an integer indicating the number of bytes read, or -1 on error.

AccessibleStreamableContent_close ()

SPIBoolean          AccessibleStreamableContent_close   (AccessibleStreamableContent *obj);

Close the current streaming connection to an AccessibleStreamableContent implementor. This must be called before any subsequent AccessibleStreamableContent_open calls on the same object.

Since: AT-SPI 1.4

obj :

a pointer to the AccessibleStreamableContent implementor on which to operate.

Returns :

TRUE if successful, FALSE if unsuccessful.