nvi/vi/vs_split.c

33 static void      vs_insert(SCR *sp, GS *gp);
44 	SCR *sp,
53 	gp = sp->gp;
57 	if (sp->rows < 4) {
58 		msgq(sp, M_ERR,
64 	vs_resolve(sp, NULL, 1);
67 	CALLOC(sp, _HMAP(new), SMAP *, SIZE_HMAP(sp), sizeof(SMAP));
70 	_HMAP(new)->lno = sp->lno;
75 	half = sp->rows / 2;
83 	issmallscreen = IS_SMALL(sp);
86 	new->coff = sp->coff;
87 	new->cols = sp->cols;
95 	 * Recalculate current cursor position based on sp->lno, we're called
100 	    !ccl && (vs_sm_cursor(sp, &smp) ? 0 : (smp - HMAP) + 1) >= half;
102 		new->rows = sp->rows - half;	/* New. */
103 		new->roff = sp->roff;
104 		sp->rows = half;		/* Old. */
105 		sp->roff += new->rows;
111 		memcpy(_HMAP(sp), _HMAP(sp) + new->rows,
112 		    (sp->t_maxrows - new->rows) * sizeof(SMAP));
115 		sp->rows -= half;		/* Old. */
116 		new->roff = sp->roff + sp->rows;
120 	sp->t_maxrows = IS_ONELINE(sp) ? 1 : sp->rows - 1;
133 			sp->t_rows -= new->rows;
136 		if (sp->t_rows > sp->t_maxrows)
137 			sp->t_rows = sp->t_maxrows;
138 		if (sp->t_minrows > sp->t_maxrows)
139 			sp->t_minrows = sp->t_maxrows;
142 		new->t_minrows = new->t_rows = O_VAL(sp, O_WINDOW);
148 		sp->t_minrows = sp->t_rows = IS_ONELINE(sp) ? 1 : sp->rows - 1;
156 		new->t_minrows = new->t_rows = O_VAL(sp, O_WINDOW);
163 	_TMAP(sp) = IS_ONELINE(sp) ?
164 	    _HMAP(sp) : _HMAP(sp) + (sp->t_rows - 1);
169 	if ((sp->defscroll = sp->t_maxrows / 2) == 0)
170 		sp->defscroll = 1;
175 	vs_insert(new, sp->gp);
178 	(void)gp->scr_split(sp, new);
197 	    F_ISSET(sp, SC_EX | SC_VI | SC_SCR_VI | SC_SCR_EX | SC_READONLY));
208 vs_vsplit(SCR *sp, SCR *new)
213 	gp = sp->gp;
216 	if (sp->cols / 2 <= MINIMUM_SCREEN_COLS) {
217 		msgq(sp, M_ERR,
224 	vs_resolve(sp, NULL, 1);
227 	CALLOC(sp, _HMAP(new), SMAP *, SIZE_HMAP(sp), sizeof(SMAP));
230 	_HMAP(new)->lno = sp->lno;
247 	cols = sp->cols / 2;
248 	new->cols = sp->cols - cols - 1;
249 	sp->cols = cols;
250 	new->coff = sp->coff + cols + 1;
251 	sp->cno = 0;
254 	new->rows = sp->rows;
255 	new->t_rows = sp->t_rows;
256 	new->t_maxrows = sp->t_maxrows;
257 	new->t_minrows = sp->t_minrows;
258 	new->roff = sp->roff;
259 	new->defscroll = sp->defscroll;
263 	vs_insert(new, sp->gp);
266 	(void)gp->scr_split(sp, new);
269 	F_SET(sp, SC_SCR_REFORMAT | SC_STATUS);
288 	    F_ISSET(sp, SC_EX | SC_VI | SC_SCR_VI | SC_SCR_EX | SC_READONLY));
298 vs_insert(SCR *sp, GS *gp)
302 	gp = sp->gp;
306 		if (tsp->roff >= sp->roff)
313 		if (tsp->roff != sp->roff || tsp->coff > sp->coff)
321 		TAILQ_INSERT_TAIL(gp->dq, sp, q);
322 	} else if (tsp->roff < sp->roff ||
323 	    (tsp->roff == sp->roff && tsp->coff < sp->coff)) {
324 		TAILQ_INSERT_AFTER(gp->dq, tsp, sp, q);
326 		TAILQ_INSERT_BEFORE(tsp, sp, q);
337 vs_discard(SCR *sp, SCR **spp)
343 	gp = sp->gp;
352 	if (sp->frp != NULL) {
353 		sp->frp->lno = sp->lno;
354 		sp->frp->cno = sp->cno;
355 		F_SET(sp->frp, FR_CURSORSET);
359 	if (!IS_SPLIT(sp)) {
360 		(void)gp->scr_discard(sp, NULL);
376 	if (vs_join(sp, list, &jdir))
400 			tsp->rows += sp->rows;
412 				tsp->roff = sp->roff;
428 				tsp->coff = sp->coff;
429 			tsp->cols += sp->cols + 1;	/* XXX: DIVIDER */
444 	(void)gp->scr_discard(sp, list);
454 vs_join(SCR *sp, SCR **listp, jdir_t *jdirp)
461 	gp = sp->gp;
464 	for (lp = listp, tlen = sp->rows,
467 		if (sp == tsp)
470 		if (tsp->coff + tsp->cols + 1 != sp->coff)
476 		if (tsp->roff > sp->roff + sp->rows)
478 		if (tsp->roff < sp->roff) {
479 			if (tsp->roff + tsp->rows >= sp->roff)
483 		if (tsp->roff + tsp->rows > sp->roff + sp->rows)
499 	for (lp = listp, tlen = sp->rows,
502 		if (sp == tsp)
505 		if (tsp->coff != sp->coff + sp->cols + 1)
511 		if (tsp->roff > sp->roff + sp->rows)
513 		if (tsp->roff < sp->roff) {
514 			if (tsp->roff + tsp->rows >= sp->roff)
518 		if (tsp->roff + tsp->rows > sp->roff + sp->rows)
534 	for (first = 0, lp = listp, tlen = sp->cols,
537 		if (sp == tsp)
540 		if (tsp->roff + tsp->rows != sp->roff)
546 		if (tsp->coff > sp->coff + sp->cols)
548 		if (tsp->coff < sp->coff) {
549 			if (tsp->coff + tsp->cols >= sp->coff)
553 		if (tsp->coff + tsp->cols > sp->coff + sp->cols)
570 	for (first = 0, lp = listp, tlen = sp->cols,
573 		if (sp == tsp)
576 		if (tsp->roff != sp->roff + sp->rows)
582 		if (tsp->coff > sp->coff + sp->cols)
584 		if (tsp->coff < sp->coff) {
585 			if (tsp->coff + tsp->cols >= sp->coff)
589 		if (tsp->coff + tsp->cols > sp->coff + sp->cols)
614 vs_fg(SCR *sp, SCR **nspp, CHAR_T *name, int newscreen)
621 	gp = sp->gp;
624 	    INT2CHAR(sp, name, STRLEN(name) + 1, np, nlen);
629 		nsp = vs_getbg(sp, np);
632 		if (vs_swap(sp, &nsp, np))
636 		msgq_wstr(sp, M_ERR, name,
648 		if (vs_split(sp, nsp, 0)) {
654 		TAILQ_REMOVE(gp->dq, sp, q);
655 		TAILQ_INSERT_TAIL(gp->hq, sp, q);
667 vs_bg(SCR *sp)
672 	gp = sp->gp;
675 	if (vs_discard(sp, &nsp))
678 		msgq(sp, M_ERR,
684 	TAILQ_REMOVE(gp->dq, sp, q);
685 	TAILQ_INSERT_TAIL(gp->hq, sp, q);
688 	free(_HMAP(sp));
689 	_HMAP(sp) = NULL;
692 	sp->nextdisp = nsp;
693 	F_SET(sp, SC_SSWITCH);
705 vs_swap(SCR *sp, SCR **nspp, char *name)
710 	gp = sp->gp;
713 	if ((*nspp = nsp = vs_getbg(sp, name)) == NULL)
723 	if (sp->frp != NULL) {
724 		sp->frp->lno = sp->lno;
725 		sp->frp->cno = sp->cno;
726 		F_SET(sp->frp, FR_CURSORSET);
730 	sp->nextdisp = nsp;
731 	F_SET(sp, SC_SSWITCH);
734 	VIP(nsp)->srows = VIP(sp)->srows;
737 	nsp->cols = sp->cols;
738 	nsp->rows = sp->rows;	/* XXX: Only place in vi that sets rows. */
739 	nsp->roff = sp->roff;
750 		if (nsp->t_rows > sp->t_maxrows)
752 		if (nsp->t_minrows > sp->t_maxrows)
765 	nsp->gp = sp->gp;
776 	TAILQ_INSERT_AFTER(gp->dq, sp, nsp, q);
788 	(void)gp->scr_discard(sp, list);
800 vs_resize(SCR *sp, long int count, adj_t adj)
806 	gp = sp->gp;
815 		if (sp->t_maxrows == count)
817 		if (sp->t_maxrows > count) {
819 			count = sp->t_maxrows - count;
822 			count = count - sp->t_maxrows;
827 	for (next = TAILQ_NEXT(sp, q); next != NULL &&
828 	     (next->coff >= sp->coff + sp->cols ||
829 	      next->coff + next->cols <= sp->coff);
833 	    (sp->coff != next->coff || sp->cols != next->cols))
835 	for (prev = TAILQ_PREV(sp, _dqh, q); prev != NULL &&
836 	     (prev->coff >= sp->coff + sp->cols ||
837 	      prev->coff + prev->cols <= sp->coff);
840 	    (sp->coff != prev->coff || sp->cols != prev->cols))
847 		s = sp;
857 		g = sp;
865 toobig:				msgq(sp, M_BERR, adj == A_DECREASE ?
871 toosmall:			msgq(sp, M_BERR,
917 vs_getbg(SCR *sp, char *name)
923 	gp = sp->gp;