From 60ddac472c76a69bbec54299199842e67abaf992 Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Tue, 15 Feb 2022 17:04:10 -0800
Subject: [PATCH] start using ncurses

For supporting wide characters I'm guided by:
  http://yjlv.blogspot.com/2015/10/displaying-unicode-with-ncurses-in-c.html
---
 Makefile |  2 +-
 ncal.c   | 50 +++++++++++++++++++++++++++-----------------------
 2 files changed, 28 insertions(+), 24 deletions(-)

diff --git a/Makefile b/Makefile
index 137b0ca..de27a74 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ PROG   = ncal
 SRC    = ncal.c calendar.c easter.c
 FLAGS  = -D_GNU_SOURCE -include bsd/string.h
 
-LIBS  += -ltinfo -lbsd
+LIBS  += -ltinfo -lbsd -lncursesw
 
 include config.mk
 
diff --git a/ncal.c b/ncal.c
index 0e910ef..5c82e1b 100644
--- a/ncal.c
+++ b/ncal.c
@@ -35,6 +35,7 @@ __FBSDID("$FreeBSD: head/usr.bin/ncal/ncal.c 326276 2017-11-27 15:37:16Z pfg $")
 #include <langinfo.h>
 #include <libgen.h>
 #include <locale.h>
+#include <ncurses.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -563,11 +564,14 @@ main(int argc, char *argv[])
 	/* And now we finally start to calculate and output calendars. */
 	if (flag_easter)
 		printeaster(y, flag_julian_cal, flag_orthodox);
-	else
+	else {
+		initscr();
 		if (flag_backward)
 			monthrangeb(y, m, flag_julian_day, before, after, highlightdate);
 		else
 			monthranger(y, m, flag_julian_day, before, after, highlightdate);
+		getch();
+	}
 	return (0);
 }
 
@@ -701,51 +705,51 @@ monthrangeb(int y, int m, int jd_flag, int before, int after, int highlightdate)
 
 		/* Empty line between two rows of months */
 		if (m != m1)
-			wprintf(L"\n");
+			printw("\n");
 
 		/* Year at the top. */
 		if (printyearheader && M2Y(m) != prevyear) {
 			sprintf(s, "%d", M2Y(m));
-			wprintf(L"%s\n", center(t, s, mpl * mw));
+			printw("%s\n", center(t, s, mpl * mw));
 			prevyear = M2Y(m);
 		}
 
 		/* Month names. */
 		for (i = 0; i < count; i++)
 			if (printyearheader)
-				wprintf(L"%-*ls  ",
+				printw("%-*ls  ",
 				    mw, wcenter(ws, year[i].name, mw));
 			else {
 				swprintf(ws, sizeof(ws)/sizeof(ws[0]),
 				    L"%-ls %d", year[i].name, M2Y(m + i));
-				wprintf(L"%-*ls  ", mw, wcenter(ws1, ws, mw));
+				printw("%-*ls  ", mw, wcenter(ws1, ws, mw));
 			}
-		wprintf(L"\n");
+		printw("\n");
 
 		/* Day of the week names. */
 		for (i = 0; i < count; i++) {
       if (flag_weeks)
-        wprintf(L" w| %s%ls%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls  ",
+        printw(" w| %s%ls%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls  ",
             wdss, wds.names[6], wdss, wds.names[0],
             wdss, wds.names[1], wdss, wds.names[2],
             wdss, wds.names[3], wdss, wds.names[4],
             wdss, wds.names[5]);
       else
-        wprintf(L"%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls ",
+        printw("%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls%s%ls ",
             wdss, wds.names[6], wdss, wds.names[0],
             wdss, wds.names[1], wdss, wds.names[2],
             wdss, wds.names[3], wdss, wds.names[4],
             wdss, wds.names[5]);
 		}
-		wprintf(L"\n");
+		printw("\n");
 
 		/* And the days of the month. */
 		for (i = 0; i != 6; i++) {
 			for (j = 0; j < count; j++)
-				wprintf(L"%-*s  ",
+				printw("%-*s  ",
 				    MW(mw, year[j].extralen[i]),
 					year[j].lines[i]+1);
-			wprintf(L"\n");
+			printw("\n");
 		}
 
 		m += mpl;
@@ -800,44 +804,44 @@ monthranger(int y, int m, int jd_flag, int before, int after, int highlightdate)
 
 		/* Empty line between two rows of months. */
 		if (m != m1)
-			wprintf(L"\n");
+			printw("\n");
 
 		/* Year at the top. */
 		if (printyearheader && M2Y(m) != prevyear) {
 			sprintf(s, "%d", M2Y(m));
-			wprintf(L"%s\n", center(t, s, mpl * mw));
+			printw("%s\n", center(t, s, mpl * mw));
 			prevyear = M2Y(m);
 		}
 
 		/* Month names. */
-		wprintf(L"    ");
+		printw("    ");
 		for (i = 0; i < count; i++)
 			if (printyearheader)
-				wprintf(L"%-*ls", mw, year[i].name);
+				printw("%-*ls", mw, year[i].name);
 			else
-				wprintf(L"%-ls %-*d", year[i].name,
+				printw("%-ls %-*d", year[i].name,
 				    mw - wcslen(year[i].name) - 1, M2Y(m + i));
-		wprintf(L"\n");
+		printw("\n");
 
 		/* And the days of the month. */
 		for (i = 0; i != 7; i++) {
 			/* Week day */
-			wprintf(L"%.2ls", wds.names[i]);
+			printw("%.2ls", wds.names[i]);
 
 			/* Full months */
 			for (j = 0; j < count; j++)
-				wprintf(L"%-*s",
+				printw("%-*s",
 				    MW(mw, year[j].extralen[i]),
 					year[j].lines[i]);
-			wprintf(L"\n");
+			printw("\n");
 		}
 
 		/* Week numbers. */
 		if (flag_weeks) {
-			wprintf(L"  ");
+			printw("  ");
 			for (i = 0; i < count; i++)
-				wprintf(L"%-*s", mw, year[i].weeks);
-			wprintf(L"\n");
+				printw("%-*s", mw, year[i].weeks);
+			printw("\n");
 		}
 
 		m += mpl;