1 files changed, 138 insertions, 0 deletions
diff --git a/contrib/nvi/ex/ex_screen.c b/contrib/nvi/ex/ex_screen.c
new file mode 100644
index 0000000..9bc5bf0
--- /dev/null
+++ b/contrib/nvi/ex/ex_screen.c
@@ -0,0 +1,138 @@
+/*-
+ * Copyright (c) 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ * Copyright (c) 1993, 1994, 1995, 1996
+ *	Keith Bostic.  All rights reserved.
+ *
+ * See the LICENSE file for redistribution information.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)ex_screen.c	10.11 (Berkeley) 6/29/96";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/queue.h>
+#include <sys/time.h>
+
+#include <bitstring.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../common/common.h"
+#include "../vi/vi.h"
+
+/*
+ * ex_bg --	:bg
+ *	Hide the screen.
+ *
+ * PUBLIC: int ex_bg __P((SCR *, EXCMD *));
+ */
+int
+ex_bg(sp, cmdp)
+	SCR *sp;
+	EXCMD *cmdp;
+{
+	return (vs_bg(sp));
+}
+
+/*
+ * ex_fg --	:fg [file]
+ *	Show the screen.
+ *
+ * PUBLIC: int ex_fg __P((SCR *, EXCMD *));
+ */
+int
+ex_fg(sp, cmdp)
+	SCR *sp;
+	EXCMD *cmdp;
+{
+	SCR *nsp;
+	int newscreen;
+
+	newscreen = F_ISSET(cmdp, E_NEWSCREEN);
+	if (vs_fg(sp, &nsp, cmdp->argc ? cmdp->argv[0]->bp : NULL, newscreen))
+		return (1);
+
+	/* Set up the switch. */
+	if (newscreen) {
+		sp->nextdisp = nsp;
+		F_SET(sp, SC_SSWITCH);
+	}
+	return (0);
+}
+
+/*
+ * ex_resize --	:resize [+-]rows
+ *	Change the screen size.
+ *
+ * PUBLIC: int ex_resize __P((SCR *, EXCMD *));
+ */
+int
+ex_resize(sp, cmdp)
+	SCR *sp;
+	EXCMD *cmdp;
+{
+	adj_t adj;
+
+	switch (FL_ISSET(cmdp->iflags,
+	    E_C_COUNT | E_C_COUNT_NEG | E_C_COUNT_POS)) {
+	case E_C_COUNT:
+		adj = A_SET;
+		break;
+	case E_C_COUNT | E_C_COUNT_NEG:
+		adj = A_DECREASE;
+		break;
+	case E_C_COUNT | E_C_COUNT_POS:
+		adj = A_INCREASE;
+		break;
+	default:
+		ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
+		return (1);
+	}
+	return (vs_resize(sp, cmdp->count, adj));
+}
+
+/*
+ * ex_sdisplay --
+ *	Display the list of screens.
+ *
+ * PUBLIC: int ex_sdisplay __P((SCR *));
+ */
+int
+ex_sdisplay(sp)
+	SCR *sp;
+{
+	GS *gp;
+	SCR *tsp;
+	int cnt, col, len, sep;
+
+	gp = sp->gp;
+	if ((tsp = gp->hq.cqh_first) == (void *)&gp->hq) {
+		msgq(sp, M_INFO, "149|No background screens to display");
+		return (0);
+	}
+
+	col = len = sep = 0;
+	for (cnt = 1; tsp != (void *)&gp->hq && !INTERRUPTED(sp);
+	    tsp = tsp->q.cqe_next) {
+		col += len = strlen(tsp->frp->name) + sep;
+		if (col >= sp->cols - 1) {
+			col = len;
+			sep = 0;
+			(void)ex_puts(sp, "\n");
+		} else if (cnt != 1) {
+			sep = 1;
+			(void)ex_puts(sp, " ");
+		}
+		(void)ex_puts(sp, tsp->frp->name);
+		++cnt;
+	}
+	if (!INTERRUPTED(sp))
+		(void)ex_puts(sp, "\n");
+	return (0);
+}