Revise refresh of extended lines.

display.c

@@ -63,7 +63,6 @@ static int curcol ;		/* Cursor column                */
 static int vtrow = 0 ;	/* Row location of SW cursor */
 static int vtcol = 0 ;	/* Column location of SW cursor */
 static int lbound = 0 ;	/* leftmost column of current line being displayed */
-static int taboff = 0 ;	/* tab offset for display       */
 
 int mpresf = FALSE ;	/* TRUE if message in last line */
 int scrollcount = 1 ;	/* number of lines to scroll */
@@ -218,7 +217,7 @@ static void vtputuc( unicode_t c) {
 
 	if( c == '\t') {
 		sane_vtputc( viewtab ? 0xBB : ' ') ;	/* 0xBB: '»' */
-		while( ((vtcol + taboff) % tabwidth) != 0)
+		while( ((vtcol + lbound) % tabwidth) != 0)
 			sane_vtputc( ' ') ;
 	} else if( c < 0x20 || c == 0x7F) {
 		sane_vtputc( '^') ;
@@ -460,6 +459,8 @@ static void show_line( line_p lp) {
 		i += utf8_to_unicode( lp->l_text, i, len, &c) ;
 		vtputuc( c) ;
 	}
+
+	vteeol() ;
 }
 
 
@@ -469,9 +470,10 @@ static void show_line( line_p lp) {
  * window_p wp;		window to update current line in
  */
 static void updone( window_p wp) {
+	line_p lp ;
+
 /* search down the line we want */
 	int sline = wp->w_toprow ;	/* physical screen line to update */
-	line_p lp ;
 	for( lp = wp->w_linep ; lp != wp->w_dotp ; lp = lforw( lp))
 		++sline ;
 
@@ -484,7 +486,6 @@ static void updone( window_p wp) {
 	vscreen[ sline]->v_rfcolor = wp->w_fcolor ;
 	vscreen[ sline]->v_rbcolor = wp->w_bcolor ;
 #endif
-	vteeol() ;
 }
 
 
@@ -506,14 +507,14 @@ static void updall( window_p wp) {
 		/* if we are not at the end */
 			show_line( lp) ;
 			lp = lforw( lp) ;
-		}
+		} else
+			vteeol() ;
 
 	/* on to the next one */
 #if	COLOR
 		vscreen[ sline]->v_rfcolor = wp->w_fcolor ;
 		vscreen[ sline]->v_rbcolor = wp->w_bcolor ;
 #endif
-		vteeol() ;
 		++sline ;
 	}
 }
@@ -524,13 +525,12 @@ static void updall( window_p wp) {
     This is the only update for simple moves.
  */
 static void updpos( void) {
+	line_p lp ;
+
 /* find the current row */
-	line_p lp = curwp->w_linep ;
 	currow = curwp->w_toprow ;
-	while( lp != curwp->w_dotp) {
+	for( lp = curwp->w_linep ; lp != curwp->w_dotp ; lp = lforw( lp))
 		++currow ;
-		lp = lforw( lp) ;
-	}
 
 /* find the current column */
 	curcol = 0 ;
@@ -571,7 +571,6 @@ static void upddex( void) {
 				||  (curcol < term.t_ncol - 1)) {
 					vtmove( i, 0) ;
 					show_line( lp) ;
-					vteeol() ;
 
 				/* this line no longer is extended */
 					vscreen[ i]->v_flag &= ~VFEXT ;
@@ -798,30 +797,20 @@ static int endofline( unicode_t *s, int n) {
 
 
 /* updext:
- *	update the extended line which the cursor is currently
+   update the extended line which the cursor is currently on at a column
- *	on at a column greater than the terminal width. The line
+   greater than the terminal width.  The line will be scrolled right or
- *	will be scrolled right or left to let the user see where
+   left to let the user see where the cursor is.
- *	the cursor is
  */
 static void updext( void) {
-	int rcursor ;	/* real cursor location */
-	line_p lp ;	/* pointer to current line */
-
 	/* calculate what column the real cursor will end up in */
-	rcursor = ((curcol - term.t_ncol) % term.t_scrsiz) + term.t_margin ;
+	lbound = curcol - ((curcol - term.t_ncol) % term.t_scrsiz + term.t_margin) ;
-	taboff = lbound = curcol - rcursor + 1 ;
 
 	/* scan through the line outputing characters to the virtual screen */
 	/* once we reach the left edge                                  */
 	vtmove( currow, -lbound) ;	/* start scanning offscreen */
-	lp = curwp->w_dotp ;	/* line to output */
+	show_line( curwp->w_dotp) ;
-	show_line( lp) ;
 
-	/* truncate the virtual line, restore tab offset */
+	/* put a '$' in column 1 */
-	vteeol() ;
-	taboff = 0 ;
-
-	/* and put a '$' in column 1 */
 	vscreen[ currow]->v_text[ 0] = '$' ;
 }
 

names.c

@@ -51,7 +51,7 @@ const name_bind names[] = {
 	{"!case-word-upper", upperword,					META | 'U'} ,
 	{" change-file-name", filename,					CTLX | 'N'} ,
 	{" change-screen-size", newsize,				META | CTL_ | 'D'} , /* M^S */
-	{" change-screen-width", newwidth,				META | CTL_ | 'T'} ,
+	{" change-screen-width", (fnp_t) newwidth,		META | CTL_ | 'T'} ,
 	{" clear-and-redraw", (fnp_t) redraw,			CTL_ | 'L'} ,
 	{" clear-message-line", (fnp_t) clrmes, 		0} ,
 	{" copy-region", copyregion,					META | 'W'} ,

window.c

@@ -652,31 +652,29 @@ BINDABLE( newsize) {
  * int f;		default flag
  * int n;		numeric argument
  */
-BINDABLE( newwidth) {
+BBINDABLE( newwidth) {
-	window_p wp;
-
 	/* if the command defaults, assume the largest */
-	if (f == FALSE)
+	if( f == FALSE)
-		n = term.t_mcol;
+		n = term.t_mcol ;
 
 	/* make sure it's in range */
-	if (n < 10 || n > term.t_mcol)
+	if( n < 10 || n > term.t_mcol)
 		return mloutfail( "%%Screen width out of range") ;
 
 	/* otherwise, just re-width it (no big deal) */
-	term.t_ncol = n;
+	term.t_ncol = n ;
-	term.t_margin = n / 10;
+	term.t_margin = n / 10 ;
-	term.t_scrsiz = n - (term.t_margin * 2);
+	if( term.t_margin < 3)	/* t_margin -1 enough for $ + prev before current */
+		term.t_margin = 3 ;
 
-	/* florce all windows to redraw */
+	term.t_scrsiz = n - (term.t_margin * 2) ;
-	wp = wheadp;
-	while (wp) {
-		wp->w_flag |= WFHARD | WFMOVE | WFMODE;
-		wp = wp->w_wndp;
-	}
-	sgarbf = TRUE;
 
-	return TRUE;
+	/* force all windows to redraw */
+	for( window_p wp = wheadp ; wp; wp = wp->w_wndp)
+		wp->w_flag |= WFHARD | WFMOVE | WFMODE ;
+
+	sgarbf = TRUE ;
+	return TRUE ;
 }
 
 int getwpos(void)

window.h

@@ -56,7 +56,7 @@ extern window_p wheadp ;    /* Head of list of windows      */
  BINDABLE( mvdnwind) ;
  BINDABLE( mvupwind) ;
  BINDABLE( newsize) ;
- BINDABLE( newwidth) ;
+BBINDABLE( newwidth) ;
  BINDABLE( nextwind) ;
  BINDABLE( onlywind) ;
  BINDABLE( prevwind) ;