34  *	Create a new screen, horizontally.
41 	SCR *new,  in vs_split()  argument
62 	/* Get a new screen map. */  in vs_split()
63 	CALLOC(sp, _HMAP(new), SIZE_HMAP(sp), sizeof(SMAP));  in vs_split()
64 	if (_HMAP(new) == NULL)  in vs_split()
66 	_HMAP(new)->lno = sp->lno;  in vs_split()
67 	_HMAP(new)->coff = 0;  in vs_split()
68 	_HMAP(new)->soff = 1;  in vs_split()
82 	new->coff = sp->coff;  in vs_split()
83 	new->cols = sp->cols;  in vs_split()
88 	 * half of the current screen, the new screen goes under the current  in vs_split()
98 		new->rows = sp->rows - half;	/* New. */  in vs_split()
99 		new->roff = sp->roff;  in vs_split()
101 		sp->roff += new->rows;  in vs_split()
107 		memcpy(_HMAP(sp), _HMAP(sp) + new->rows,  in vs_split()
108 		    (sp->t_maxrows - new->rows) * sizeof(SMAP));  in vs_split()
110 		new->rows = half;		/* New. */  in vs_split()
112 		new->roff = sp->roff + sp->rows;  in vs_split()
117 	new->t_maxrows = IS_ONELINE(new) ? 1 : new->rows - 1;  in vs_split()
124 	 * new screen sizes.  in vs_split()
129 			sp->t_rows -= new->rows;  in vs_split()
138 		new->t_minrows = new->t_rows = O_VAL(sp, O_WINDOW);  in vs_split()
139 		if (new->t_rows > new->t_maxrows)  in vs_split()
140 			new->t_rows = new->t_maxrows;  in vs_split()
141 		if (new->t_minrows > new->t_maxrows)  in vs_split()
142 			new->t_minrows = new->t_maxrows;  in vs_split()
147 		 * The new screen may be a small screen, even if the parent  in vs_split()
152 		new->t_minrows = new->t_rows = O_VAL(sp, O_WINDOW);  in vs_split()
153 		if (new->t_rows > new->rows - 1)  in vs_split()
154 			new->t_minrows = new->t_rows =  in vs_split()
155 			    IS_ONELINE(new) ? 1 : new->rows - 1;  in vs_split()
158 	/* Adjust the ends of the new and old maps. */  in vs_split()
161 	_TMAP(new) = IS_ONELINE(new) ?  in vs_split()
162 	    _HMAP(new) : _HMAP(new) + (new->t_rows - 1);  in vs_split()
167 	if ((new->defscroll = new->t_maxrows / 2) == 0)  in vs_split()
168 		new->defscroll = 1;  in vs_split()
171 	vs_insert(new, sp->gp);  in vs_split()
174 	(void)gp->scr_split(sp, new);  in vs_split()
189 	 * Draw the new screen from scratch, and add a status line.  in vs_split()
191 	F_SET(new,  in vs_split()
199  *	Create a new screen, vertically.
204 vs_vsplit(SCR *sp, SCR *new)  in vs_vsplit()  argument
222 	/* Get a new screen map. */  in vs_vsplit()
223 	CALLOC(sp, _HMAP(new), SIZE_HMAP(sp), sizeof(SMAP));  in vs_vsplit()
224 	if (_HMAP(new) == NULL)  in vs_vsplit()
226 	_HMAP(new)->lno = sp->lno;  in vs_vsplit()
227 	_HMAP(new)->coff = 0;  in vs_vsplit()
228 	_HMAP(new)->soff = 1;  in vs_vsplit()
244 	new->cols = sp->cols - cols - 1;  in vs_vsplit()
246 	new->coff = sp->coff + cols + 1;  in vs_vsplit()
250 	new->rows = sp->rows;  in vs_vsplit()
251 	new->t_rows = sp->t_rows;  in vs_vsplit()
252 	new->t_maxrows = sp->t_maxrows;  in vs_vsplit()
253 	new->t_minrows = sp->t_minrows;  in vs_vsplit()
254 	new->roff = sp->roff;  in vs_vsplit()
255 	new->defscroll = sp->defscroll;  in vs_vsplit()
256 	_TMAP(new) = _HMAP(new) + (new->t_rows - 1);  in vs_vsplit()
259 	vs_insert(new, sp->gp);  in vs_vsplit()
262 	(void)gp->scr_split(sp, new);  in vs_vsplit()
280 	 * Draw the new screen from scratch, and add a status line.  in vs_vsplit()
282 	F_SET(new,  in vs_vsplit()
290  *	Insert the new screen into the correct place in the logical
605  *	Background the current screen, and foreground a new one.
640 		/* Remove the new screen from the background queue. */  in vs_fg()
740 	 * The new screens may have different screen options sizes than the  in vs_swap()
742 	 * than the new screen sizes.  in vs_swap()
756 	/* Allocate a new screen map. */  in vs_swap()
766 	 * The new screen replaces the old screen in the parent/child list.  in vs_swap()
767 	 * We insert the new screen after the old one.  If we're exiting,  in vs_swap()
780 	/* Draw the new screen from scratch, and add a status line. */  in vs_swap()