brlapi_write - Man Page

struct brlapi_writeArguments_t

#define BRLAPI_DISPLAY_DEFAULT   -1
#define BRLAPI_CURSOR_LEAVE   -1
#define BRLAPI_CURSOR_OFF   0
#define BRLAPI_WRITEARGUMENTS_INITIALIZER

int BRLAPI_STDCALL brlapi_writeText (int cursor, const char *text)
int BRLAPI_STDCALL brlapi__writeText (brlapi_handle_t *handle, int cursor, const char *text)
int BRLAPI_STDCALL brlapi_writeWText (int cursor, const wchar_t *text)
int BRLAPI_STDCALL brlapi__writeWText (brlapi_handle_t *handle, int cursor, const wchar_t *text)
int BRLAPI_STDCALL brlapi_writeDots (const unsigned char *dots)
int BRLAPI_STDCALL brlapi__writeDots (brlapi_handle_t *handle, const unsigned char *dots)
int BRLAPI_STDCALL brlapi_write (const brlapi_writeArguments_t *arguments)
int BRLAPI_STDCALL brlapi__write (brlapi_handle_t *handle, const brlapi_writeArguments_t *arguments)

Do not change the cursor's state or position.

See also

brlapi_writeText() brlapi_write() brlapi_writeArguments_t

Do not display the cursor.

See also

brlapi_writeText() brlapi_write() brlapi_writeArguments_t

Write to the default display on the braille device.

See also

brlapi_write() brlapi_writeArguments_t

Value:

  { \
  .displayNumber = BRLAPI_DISPLAY_DEFAULT, \
  .regionBegin = 0, \
  .regionSize = 0, \
  .text = NULL, \
  .textSize = -1, \
  .andMask = NULL, \
  .orMask = NULL, \
  .cursor = BRLAPI_CURSOR_LEAVE, \
  .charset = NULL \
}

Allows to initialize a structure of type brlapi_writeArguments_t * with default values: displayNumber = BRLAPI_DISPLAY_DEFAULT; (unspecified) regionBegin = regionSize = 0; (update the whole display, DEPRECATED and will be forbidden in next release. You must always express the region you wish to update) text = andMask = orMask = NULL; (no text, no attribute) cursor = BRLAPI_CURSOR_LEAVE; (don't touch cursor)

Update a specific region of the braille display and apply and/or masks

Parameters

arguments gives information necessary for the update

regionBegin and regionSize must be filled for specifying which part of the display will be updated, as well as the size (in characters, not bytes) of the text, andMask and orMask members.

If given, the 'text' field holds the text that will be displayed in the region. The char string must hold exactly as many characters as the region fields express. For multibyte text, this is the number of multibyte caracters. Notably, combining and double-width caracters count for 1.

The actual length of the text in bytes may be specified thanks to textSize. If -1 is given, it will be computed thanks to strlen(), so 'text' must then be a NUL-terminated string.

The 'andMask' and 'orMask' masks, if present, are then applied on top of the text, one byte per character. This hence permits the superimposing of attributes over the text. For instance, setting an andMask mask full of BRLAPI_DOTS(1,1,1,1,1,1,0,0) will only keep (logical AND) dots 1-6, hence dropping dots 7 and 8. On the contrary, setting an orMask full of BRLAPI_DOT7|BRLAPI_DOT8 will add (logical OR) dots 7 and 8.

The 'charset' field, if present, specifies the charset of the 'text' field. If it is '', the current locale's charset (if any) is assumed. Else, the 8-bit charset of the server is assumed.

A special invocation is with an unmodified initialized structure: this clears the client's whole display, letting the display of other applications on the same tty or of applications 'under' the tty appear. See Concurrency management section of the BrlAPI documentation for more details.

Returns

Write the given dots array to the display

Parameters

dots points on an array of dot information, one per character. Its size must hence be the same as what brlapi_getDisplaySize() returns.

Returns

Write the given \0-terminated string to the braille display

If the string is too long, it is truncated. If it's too short, it is padded with spaces. The text is assumed to be in the current application locale charset set by setlocale(3) if it was called, or the locale charset from the application locale environment variables if setlocale(3) was not called.

Parameters

cursor gives the cursor position; if equal to BRLAPI_CURSOR_OFF, no cursor is shown at all; if cursor==BRLAPI_CURSOR_LEAVE, the cursor is left where it is
text points to the string to be displayed.

Returns

Write the given \0-terminated unicode string to the braille display

If the string is too long, it is truncated. If it's too short, it is padded with spaces.

Parameters

cursor gives the cursor position; if equal to BRLAPI_CURSOR_OFF, no cursor is shown at all; if cursor==BRLAPI_CURSOR_LEAVE, the cursor is left where it is
text points to the string to be displayed.

Returns