From a41d3aa1190512c05ef7c4d4f9671f1d0e4a9fac Mon Sep 17 00:00:00 2001
From: ache <ache@FreeBSD.org>
Date: Tue, 29 Nov 1994 02:48:20 +0000
Subject: wscrl: implement partial scrolling via al/dl winsdel: implemented via
 wscrl winsertln/deleteln: implemented as macros via winsdel

---
 lib/libncurses/Makefile     |   6 +-
 lib/libncurses/lib_insdel.c |  98 +++---------------
 lib/libncurses/lib_scroll.c | 247 +++++++++++++++++++++++++++++++-------------
 lib/libncurses/ncurses.h    |   4 +-
 4 files changed, 193 insertions(+), 162 deletions(-)

(limited to 'lib/libncurses')

diff --git a/lib/libncurses/Makefile b/lib/libncurses/Makefile
index 2f758f2..9ed3a67 100644
--- a/lib/libncurses/Makefile
+++ b/lib/libncurses/Makefile
@@ -1,5 +1,5 @@
 # Makefile for ncurses
-# $Id: Makefile,v 1.5 1994/10/12 01:59:06 ache Exp $
+# $Id: Makefile,v 1.6 1994/10/28 06:56:55 ache Exp $
 
 LIB=    ncurses
 SRCS=   lib_kernel.c lib_pad.c\
@@ -8,8 +8,8 @@ SRCS=   lib_kernel.c lib_pad.c\
 	lib_addstr.c lib_scroll.c lib_clreol.c lib_touch.c lib_mvcur.c lib_keyname.c\
 	lib_delwin.c lib_endwin.c lib_clrbot.c lib_move.c lib_printw.c \
 	lib_scanw.c lib_erase.c lib_getch.c lib_options.c lib_acs.c lib_slk.c\
-	lib_box.c lib_clear.c lib_delch.c lib_deleteln.c lib_insch.c \
-	lib_insertln.c lib_getstr.c lib_mvwin.c lib_longname.c lib_tstp.c \
+	lib_box.c lib_clear.c lib_delch.c lib_insch.c \
+	lib_getstr.c lib_mvwin.c lib_longname.c lib_tstp.c \
 	lib_newterm.c lib_set_term.c lib_overlay.c lib_scrreg.c lib_color.c \
 	lib_insstr.c lib_insdel.c lib_twait.c copyright.c
 
diff --git a/lib/libncurses/lib_insdel.c b/lib/libncurses/lib_insdel.c
index 879631f..9eb130b 100644
--- a/lib/libncurses/lib_insdel.c
+++ b/lib/libncurses/lib_insdel.c
@@ -19,11 +19,7 @@
 int
 winsdel(WINDOW *win, int n)
 {
-int	line, i;
-int touched = 0;
-chtype	*ptr, *temp;
-chtype  **saved;
-chtype	blank = ' ';
+	int ret, sscroll, stop, sbot;
 
 	T(("winsdel(%x,%d) called", win, n));
 
@@ -34,88 +30,20 @@ chtype	blank = ' ';
 		/* should we truncate to an appropriate number? */
 		return ERR;
 
+	sscroll = win->_scroll;
+	stop = win->_regtop;
+	sbot = win->_regbottom;
 
-    saved = (chtype **)malloc(sizeof(chtype *) * abs(n));
+	win->_scroll = TRUE;
+	win->_regtop = win->_cury;
+	if (win->_regtop > win->_regbottom)
+		win->_regbottom = win->_maxy;
 
-    if (n < 0) {
-		/* save overwritten lines */
-		
-		for (i = 0; i < -n; i++)
-		    saved[i] = win->_line[win->_regbottom-i];
+	ret = wscrl(win, -n);
 
-		/* delete n lines */
-		
-		for (line = win->_regbottom; line >= win->_cury; line--)
-		    win->_line[line] = win->_line[line+n];
+	win->_scroll = sscroll;
+	win->_regtop = stop;
+	win->_regbottom = sbot;
 
-		/* restore saved lines and blank them */
-
-		for (i = 0, line = win->_regtop; line < win->_regtop-n; line++, i++) {
-		    win->_line[line] = saved[i]; 
-		    temp = win->_line[line];
-		    for (ptr = temp; ptr - temp <= win->_maxx; ptr++)
-				*ptr = blank;
-		}
-    }
-
-    if (n > 0) {
-		/* save overwritten lines */
-		
-		for (i = 0; i < n; i++)
-		    saved[i] = win->_line[win->_regtop+i];
-
-		/* insert n lines */
-		
-		for (line = win->_regtop; line < win->_regtop + n; line++)
-		    win->_line[line] = win->_line[line+n];
-
-		/* restore saved lines and blank them */
-
-		for (i = 0, line = win->_regtop + n; i < n; line--, i++) {
-		    temp = win->_line[line] = saved[i];
-		    for (ptr = temp; ptr - temp <= win->_maxx; ptr++)
-			*ptr = blank;
-		}
-	}
-	
-	free(saved);
-
-	/* as an optimization, if the window is COLS wide we can try
-	   using idl assuming _idlok is true */
-
-    if (win->_maxx == columns && win->_idlok == TRUE) {
-
-		wrefresh(win);
-		if (n > 0) {
-			mvcur(-1, -1, win->_cury, 0);
-			if (parm_insert_line) {
-				putp(tparm(parm_insert_line, n));
-				touched = 1;
-			} else if (insert_line) {
-				while (n--)
-					putp(insert_line);
-				touched = 1;
-			}
-		}
-
-		if (n < 0) {
-			mvcur(-1, -1, win->_cury, 0);
-			n = abs(n);
-			if (parm_delete_line) {
-				putp(tparm(parm_delete_line, n));
-				touched = 1;
-		    } else if (delete_line) {
-		    	while (n--)
-					putp(delete_line);
-				touched = 1;
-			}
-		}
-
-		mvcur(-1, -1, win->_cury, win->_curx);
-	} 
-	if (touched == 0) 
-	    touchline(win, win->_regtop, win->_regbottom - win->_regtop + 1);
-	touched = 0;
-
-    return OK;
+	return ret;
 }
diff --git a/lib/libncurses/lib_scroll.c b/lib/libncurses/lib_scroll.c
index c15e52e..0f27817 100644
--- a/lib/libncurses/lib_scroll.c
+++ b/lib/libncurses/lib_scroll.c
@@ -19,9 +19,9 @@
 int
 wscrl(WINDOW *win, int n)
 {
-int	line, i;
+int     line, i, touched = 0;
 chtype	*ptr, *temp;
-chtype  **saved;
+chtype  **saved, **newsaved = NULL, **cursaved = NULL;
 chtype	blank = ' ';
 
 	T(("wscrl(%x,%d) called", win, n));
@@ -34,88 +34,191 @@ chtype	blank = ' ';
 
     /* test for scrolling region == entire screen */
 
-    saved = (chtype **)malloc(sizeof(chtype *) * abs(n));
+	/* as an optimization, if the scrolling region is the entire screen
+	   scroll the physical screen */
+	/* should we extend this to include smaller scrolling ranges by using
+	   change_scroll_region? */
 
-    if (n < 0) {
-		/* save overwritten lines */
-		
-		for (i = 0; i < -n; i++)
-		    saved[i] = win->_line[win->_regbottom-i];
-
-		/* shift n lines */
-		
-		for (line = win->_regbottom; line > win->_regtop+n; line--)
-		    win->_line[line] = win->_line[line+n];
-
-		/* restore saved lines and blank them */
-
-		for (i = 0, line = win->_regtop; line < win->_regtop-n; line++, i++) {
-		    win->_line[line] = saved[i]; 
-		    temp = win->_line[line];
-		    for (ptr = temp; ptr - temp <= win->_maxx; ptr++)
-				*ptr = blank;
+    if (   win->_begx == 0 && win->_maxx == columns - 1
+	&& !memory_above && !memory_below
+	&& ((win->_regtop == 0 && win->_regbottom == lines - 1
+	     && (   (n < 0 && (parm_rindex || scroll_reverse))
+		 || (n > 0 && (parm_index || scroll_forward))
+		)
+	    ) || (win->_idlok && (parm_insert_line || insert_line)
+		  && (parm_delete_line || delete_line)
+		 )
+	   )
+       ) {
+		wrefresh(win);
+		if (n < 0) {
+			if (   win->_regtop == 0 && win->_regbottom == lines - 1
+			    && (parm_rindex || scroll_reverse)
+			   ) {
+				i = abs(n);
+				mvcur(-1, -1, win->_regtop, 0);
+				if (parm_rindex) {
+					putp(tparm(parm_rindex, i));
+				} else if (scroll_reverse) {
+					while (i--)
+						putp(scroll_reverse);
+				}
+			} else {
+				i = abs(n);
+				if (win->_regbottom < lines - 1) {
+					mvcur(-1, -1, win->_regbottom, 0);
+					if (parm_delete_line) {
+						putp(tparm(parm_delete_line, i));
+					} else if (delete_line) {
+						while (i--)
+							putp(delete_line);
+						i = abs(n);
+					}
+				}
+				mvcur(-1, -1, win->_regtop, 0);
+				if (parm_insert_line) {
+					putp(tparm(parm_insert_line, i));
+				} else if (insert_line) {
+					while (i--)
+						putp(insert_line);
+				}
+			}
+		} else {
+			if (   win->_regtop == 0 && win->_regbottom == lines - 1
+			    && (parm_index || scroll_forward)
+			   ) {
+				mvcur(-1, -1, win->_regbottom, 0);
+				if (parm_index) {
+					putp(tparm(parm_index, n));
+				} else if (scroll_forward) {
+					i = n;
+					while (i--)
+						putp(scroll_forward);
+				}
+			} else {
+				mvcur(-1, -1, win->_regtop, 0);
+				if (parm_delete_line) {
+					putp(tparm(parm_delete_line, n));
+				} else if (delete_line) {
+					i = n;
+					while (i--)
+						putp(delete_line);
+				}
+				if (win->_regbottom < lines - 1) {
+					mvcur(win->_regtop, 0, win->_regbottom, 0);
+					if (parm_insert_line) {
+						putp(tparm(parm_insert_line, n));
+					} else if (insert_line) {
+						i = n;
+						while (i--)
+							putp(insert_line);
+					}
+				}
+			}
 		}
-    }
 
-    if (n > 0) {
-		/* save overwritten lines */
-		
-		for (i = 0; i < n; i++)
-		    saved[i] = win->_line[win->_regtop+i];
+		mvcur(-1, -1, win->_cury, win->_curx);
+		touched = 1;
+	}
 
-		/* shift n lines */
-		
-		for (line = win->_regtop; line < win->_regbottom; line++)
-		    win->_line[line] = win->_line[line+n];
+    saved = (chtype **)malloc(sizeof(chtype *) * abs(n));
+    if (touched) {
+	newsaved = (chtype **)malloc(sizeof(chtype *) * abs(n));
+	cursaved = (chtype **)malloc(sizeof(chtype *) * abs(n));
+    }
 
-		/* restore saved lines and blank them */
+    if (n < 0) {
+	/* save overwritten lines */
+
+	for (i = 0; i < -n; i++) {
+	    saved[i] = win->_line[win->_regbottom-i];
+	    if (touched) {
+		newsaved[i] = newscr->_line[win->_begy+win->_regbottom-i];
+		cursaved[i] = curscr->_line[win->_begy+win->_regbottom-i];
+	    }
+	}
 
-		for (i = 0, line = win->_regbottom; line > win->_regbottom - n; line--, i++) {
-		    win->_line[line] = saved[i];
-		    temp = win->_line[line];
-		    for (ptr = temp; ptr - temp <= win->_maxx; ptr++)
-			*ptr = blank;
-		}
+	/* shift n lines */
+
+	for (line = win->_regbottom; line >= win->_regtop - n; line--) {
+	    win->_line[line] = win->_line[line+n];
+	    if (touched) {
+		newscr->_line[win->_begy+line] = newscr->_line[win->_begy+line+n];
+		curscr->_line[win->_begy+line] = curscr->_line[win->_begy+line+n];
+	    }
 	}
-	
-	free(saved);
 
-	/* as an optimization, if the scrolling region is the entire screen
-	   scroll the physical screen */
-	/* should we extend this to include smaller scrolling ranges by using
-	   change_scroll_region? */
+	/* restore saved lines and blank them */
+
+	for (i = 0, line = win->_regtop; line < win->_regtop-n; line++, i++) {
+	    win->_line[line] = saved[i];
+	    if (touched) {
+		newscr->_line[win->_begy+line] = newsaved[i];
+		curscr->_line[win->_begy+line] = cursaved[i];
+	    }
+	    temp = win->_line[line];
+	    for (ptr = temp; ptr - temp <= win->_maxx; ptr++)
+		*ptr = blank;
+	    if (touched) {
+		temp = newscr->_line[win->_begy+line];
+		for (ptr = temp; ptr - temp <= newscr->_maxx; ptr++)
+		    *ptr = blank;
+		temp = curscr->_line[win->_begy+line];
+		for (ptr = temp; ptr - temp <= curscr->_maxx; ptr++)
+		    *ptr = blank;
+	    }
+	}
+    } else {
+	/* save overwritten lines */
+
+	for (i = 0; i < n; i++) {
+	    saved[i] = win->_line[win->_regtop+i];
+	    if (touched) {
+		newsaved[i] = newscr->_line[win->_begy+win->_regtop+i];
+		cursaved[i] = curscr->_line[win->_begy+win->_regtop+i];
+	    }
+	}
 
-    if (win->_maxx == columns && win->_regtop == 0 && win->_regbottom == lines) {
+	/* shift n lines */
 
-		wrefresh(win);
-		/* at the moment this relies on scroll_reverse and scroll_forward
-		   or parm_rindex and parm_index.
-		   we should add idl support as an alternative */
-
-		if (n > 0) {
-			mvcur(-1, -1, win->_regtop, 0);
-			if (parm_rindex) {
-				putp(tparm(parm_rindex, n));
-			} else if (scroll_reverse) {
-				while (n--)
-					putp(scroll_reverse);
-			}
-		}
+	for (line = win->_regtop; line <= win->_regbottom - n; line++) {
+	    win->_line[line] = win->_line[line+n];
+	    if (touched) {
+		newscr->_line[win->_begy+line] = newscr->_line[win->_begy+line+n];
+		curscr->_line[win->_begy+line] = curscr->_line[win->_begy+line+n];
+	    }
+	}
 
-		if (n < 0) {
-			mvcur(-1, -1, win->_regbottom, columns);
-			n = abs(n);
-			if (parm_index) {
-				putp(tparm(parm_index, n));
-		    } else if (scroll_forward) {
-		    	while (n--)
-					putp(scroll_forward);
-			}
-		}
+	/* restore saved lines and blank them */
+
+	for (i = 0, line = win->_regbottom; line > win->_regbottom - n; line--, i++) {
+	    win->_line[line] = saved[i];
+	    if (touched) {
+		newscr->_line[win->_begy+line] = newsaved[i];
+		curscr->_line[win->_begy+line] = cursaved[i];
+	    }
+	    temp = win->_line[line];
+	    for (ptr = temp; ptr - temp <= win->_maxx; ptr++)
+		*ptr = blank;
+	    if (touched) {
+		temp = newscr->_line[win->_begy+line];
+		for (ptr = temp; ptr - temp <= newscr->_maxx; ptr++)
+		    *ptr = blank;
+		temp = curscr->_line[win->_begy+line];
+		for (ptr = temp; ptr - temp <= curscr->_maxx; ptr++)
+		    *ptr = blank;
+	    }
+	}
+    }
+	
+    free(saved);
+    if (touched) {
+	free(newsaved);
+	free(cursaved);
+    }
 
-		mvcur(-1, -1, win->_cury, win->_curx);
-	} else 
-	    touchline(win, win->_regtop, win->_regbottom - win->_regtop + 1);
+    if (!touched)
+	touchline(win, win->_regtop, win->_regbottom - win->_regtop + 1);
 
     return OK;
 }
diff --git a/lib/libncurses/ncurses.h b/lib/libncurses/ncurses.h
index 6f11d18..d9f615a 100644
--- a/lib/libncurses/ncurses.h
+++ b/lib/libncurses/ncurses.h
@@ -240,14 +240,12 @@ extern int wclear(WINDOW *);
 extern int wclrtobot(WINDOW *);
 extern int wclrtoeol(WINDOW *);
 extern int wdelch(WINDOW *);
-extern int wdeleteln(WINDOW *);
 extern int werase(WINDOW *);
 extern int wgetch(WINDOW *);
 extern int wgetnstr(WINDOW *,char *,int maxlen);
 extern int whline(WINDOW *,chtype,int);
 extern int winsch(WINDOW *,chtype);
 extern int winsdel(WINDOW *,int);
-extern int winsertln(WINDOW *);
 extern int winsnstr(WINDOW *,char *,int);
 extern int wmove(WINDOW *,int,int);
 extern int wnoutrefresh(WINDOW *);
@@ -327,6 +325,8 @@ extern int slk_touch(void);
 #define vline(ch, n)		wvline(stdscr, ch, n)
 
 #define winsstr(w, s)		winsnstr(w, s, 0)
+#define winsertln(w)            winsdel(w, 1)
+#define wdeleteln(w)            winsdel(w, -1)
 
 #define redrawwin(w)		redrawln(w, 0, w->_maxy+1)
 
-- 
cgit v1.1