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Implement CBT

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This commit is contained in:
Kovid Goyal 2016-11-30 21:50:54 +05:30
parent 93808cf757
commit 9e68cc559a
4 changed files with 22 additions and 0 deletions
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2
kitty/control-codes.h
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@ -225,6 +225,8 @@
// *Horizontal position adjust*: Same as :data:`CHA`.
#define HPA '`'
// Back tab
#define CBT 'Z'
// Misc sequences
// ----------------

2
kitty/data-types.h
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@ -353,6 +353,8 @@ void screen_reverse_index(Screen *self);
void screen_index(Screen *self);
void screen_reset(Screen *self);
void screen_set_tab_stop(Screen *self);
void screen_tab(Screen *self);
void screen_backtab(Screen *self, unsigned int);
void screen_clear_tab_stop(Screen *self, unsigned int how);
void screen_set_mode(Screen *self, unsigned int mode);
void screen_reset_mode(Screen *self, unsigned int mode);

2
kitty/parser.c
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@ -410,6 +410,8 @@ dispatch_csi(Screen *screen, PyObject DUMP_UNUSED *dump_callback) {
CALL_CSI_HANDLER1(screen_cursor_to_column, 1);
case VPA:
CALL_CSI_HANDLER1(screen_cursor_to_line, 1);
case CBT:
CALL_CSI_HANDLER1(screen_backtab, 1);
case CUP:
case HVP:
CALL_CSI_HANDLER2(screen_cursor_position, 1, 1);

16
kitty/screen.c
View File

@ -430,6 +430,22 @@ screen_tab(Screen *self) {
}
}
void
screen_backtab(Screen *self, unsigned int count) {
// Move back count tabs
if (!count) count = 1;
unsigned int before = self->cursor->x;
int i;
while (count > 0 && self->cursor->x > 0) {
count--;
for (i = self->cursor->x - 1; i >= 0; i--) {
if (self->tabstops[i]) { self->cursor->x = i; break; }
}
if (i <= 0) self->cursor->x = 0;
}
if (before != self->cursor->x) tracker_cursor_changed(self->change_tracker);
}
void
screen_clear_tab_stop(Screen *self, unsigned int how) {
switch(how) {