Method
PangoLayoutmove_cursor_visually
Declaration [src]
void
pango_layout_move_cursor_visually (
PangoLayout* layout,
gboolean strong,
int old_index,
int old_trailing,
int direction,
int* new_index,
int* new_trailing
)
Description [src]
Computes a new cursor position from an old position and a direction.
If direction
is positive, then the new position will cause the strong
or weak cursor to be displayed one position to right of where it was
with the old cursor position. If direction
is negative, it will be
moved to the left.
In the presence of bidirectional text, the correspondence between logical and visual order will depend on the direction of the current run, and there may be jumps when the cursor is moved off of the end of a run.
Motion here is in cursor positions, not in characters, so a single call to this function may move the cursor over multiple characters when multiple characters combine to form a single grapheme.
Parameters
strong |
gboolean |
Whether the moving cursor is the strong cursor or the weak cursor. The strong cursor is the cursor corresponding to text insertion in the base direction for the layout. |
|
old_index |
int |
The byte index of the current cursor position. |
|
old_trailing |
int |
If 0, the cursor was at the leading edge of the
grapheme indicated by |
|
direction |
int |
Direction to move cursor. A negative value indicates motion to the left. |
|
new_index |
int* |
Location to store the new cursor byte index.
A value of -1 indicates that the cursor has been moved off the
beginning of the layout. A value of |
|
The argument will be set by the function. | |
new_trailing |
int* |
Number of characters to move forward from
the location returned for |
|
The argument will be set by the function. |