commit 0aef305d12c879faacb155c7b7348e6dcd99f394
from: Omar Polo <op@omarpolo.com>
date: Mon Jan 10 15:04:15 2022 UTC

add vi-like `~' fringes after the end of the buffers

commit - 23ca9d13ca4a4a1ef66bd6fa717bef548dbe8fba
commit + 0aef305d12c879faacb155c7b7348e6dcd99f394
blob - f9f37a87eedaff718d71a10e8a2233e0938f5bd2
blob + 605bcc2a5b658a91ad2bc6feaf3eb77d3638f65c
--- defaults.c
+++ defaults.c
@@ -41,6 +41,18 @@ int max_killed_tabs = 10;
 int olivetti_mode = 1;
 int set_title = 1;
 int tab_bar_show = 1;
+
+static struct line fringe_line = {
+	.type = LINE_FRINGE,
+};
+struct vline fringe = {
+	/*
+	 * This is a special vline, it won't ever be free'd, as it's
+	 * only "virtual" for the UI, it's never added to a buffer.
+	 */
+	.line = (char *)"",
+	.parent = &fringe_line,
+};
 
 struct lineprefix line_prefixes[] = {
 	[LINE_TEXT] =		{ "",		"" },
@@ -68,6 +80,8 @@ struct lineprefix line_prefixes[] = {
 	[LINE_DOWNLOAD] =	{" Fetching ", "          "},
 	[LINE_DOWNLOAD_DONE] =	{" Done     ", "          "},
 	[LINE_DOWNLOAD_INFO] =	{" ", " "},
+
+	[LINE_FRINGE] =		{"", ""},
 };
 
 struct line_face line_faces[] = {
@@ -191,6 +205,13 @@ struct line_face line_faces[] = {
 		.pair = PDOWNLOAD_INFO,
 		.trail_pair = PDOWNLOAD_INFO_TRAIL
 	},
+
+	/* misc ui */
+	[LINE_FRINGE] = {
+		.prfx_pair = PFRINGE,
+		.pair = PFRINGE,
+		.trail_pair = PFRINGE_TRAIL,
+	}
 };
 
 struct tab_face tab_face = {
@@ -264,6 +285,9 @@ struct mapping {
 	{"download.ongoing",	LINE_DOWNLOAD},
 	{"download.done",	LINE_DOWNLOAD_DONE},
 	{"download.info",	LINE_DOWNLOAD_INFO},
+
+	/* misc ui */
+	{"fringe",		LINE_FRINGE},
 };
 
 static struct mapping *
blob - 177c8b83606b33ad09561dae2b66e7d0413a05db
blob + 8c8b3a8b7db06d3abba3a4cfb0d159db40c990cc
--- defaults.h
+++ defaults.h
@@ -33,6 +33,8 @@ extern int	 olivetti_mode;
 extern int	 set_title;
 extern int	 tab_bar_show;
 
+extern struct vline fringe;
+
 struct lineprefix {
 	const char	*prfx1;
 	const char	*prfx2;
blob - 464645a0f4b4328d77b50d86c75c04e5a4a6dff8
blob + 5facedbac001028d9b4a2f887d3d3b715606ffe2
--- telescope.h
+++ telescope.h
@@ -106,6 +106,9 @@ enum line_type {
 	LINE_DOWNLOAD,
 	LINE_DOWNLOAD_DONE,
 	LINE_DOWNLOAD_INFO,
+
+	/* misc ui */
+	LINE_FRINGE,
 };
 
 /* for lines: mark as hidden */
blob - 59bc25a054e90eb846d92fee014ba499b23e28d0
blob + a4803f9231ebca27a7e363810dc46e96ce477d45
--- ui.c
+++ ui.c
@@ -60,7 +60,7 @@ static void		 rearrange_windows(void);
 static void		 line_prefix_and_text(struct vline *, char *, size_t, const char **, const char **);
 static void		 print_vline(int, int, WINDOW*, struct vline*);
 static void		 redraw_tabline(void);
-static void		 redraw_window(WINDOW*, int, int, int, struct buffer*);
+static void		 redraw_window(WINDOW *, int, int, int, int, struct buffer *);
 static void		 redraw_download(void);
 static void		 redraw_help(void);
 static void		 redraw_body(struct tab*);
@@ -639,10 +639,10 @@ adjust_line(struct vline *vl, struct buffer *buffer)
 
 static void
 redraw_window(WINDOW *win, int off, int height, int width,
-    struct buffer *buffer)
+    int show_fringe, struct buffer *buffer)
 {
 	struct vline	*vl;
-	int		 l, onscreen;
+	int		 onscreen = 0, l = 0;
 
 	restore_curs_x(buffer);
 
@@ -670,8 +670,6 @@ again:
 
 	buffer->current_line = adjust_line(buffer->current_line, buffer);
 
-	l = 0;
-	onscreen = 0;
 	for (vl = buffer->top_line; vl != NULL; vl = TAILQ_NEXT(vl, vlines)) {
 		if (vl->parent->flags & L_HIDDEN)
 			continue;
@@ -707,19 +705,22 @@ again:
 	buffer->last_line_off = buffer->line_off;
 	buffer->force_redraw = 0;
 end:
+	for (; show_fringe && l < height; l++)
+		print_vline(0, width, win, &fringe);
+
 	wmove(win, buffer->curs_y, buffer->curs_x);
 }
 
 static void
 redraw_download(void)
 {
-	redraw_window(download, 0, download_lines, COLS, &downloadwin);
+	redraw_window(download, 0, download_lines, COLS, 0, &downloadwin);
 }
 
 static void
 redraw_help(void)
 {
-	redraw_window(help, 0, help_lines, help_cols, &helpwin);
+	redraw_window(help, 0, help_lines, help_cols, 1, &helpwin);
 }
 
 static void
@@ -731,7 +732,7 @@ redraw_body(struct tab *tab)
 		tab->buffer.force_redraw =1;
 	last_tab = tab;
 
-	redraw_window(body, x_offset, body_lines, body_cols, &tab->buffer);
+	redraw_window(body, x_offset, body_lines, body_cols, 1, &tab->buffer);
 }
 
 static inline char
@@ -875,7 +876,7 @@ do_redraw_minibuffer(void)
 static void
 do_redraw_minibuffer_compl(void)
 {
-	redraw_window(minibuffer, 0, 10, COLS,
+	redraw_window(minibuffer, 0, 10, COLS, 1,
 	    &ministate.compl.buffer);
 }
 
blob - 91f25e72264b4b2b92e490dcce6e798344b7166e
blob + 00fe68291a346562f2e358b9eaef4fad166db13d
--- ui.h
+++ ui.h
@@ -118,6 +118,9 @@ enum pairs {
 	PMODELINE,
 
 	PMINIBUF,
+
+	PFRINGE,
+	PFRINGE_TRAIL,
 };
 
 extern struct thiskey thiskey;
blob - 7cf9b8af5ba28dda0dbf628cf0c5cdc7a7491f40
blob + 338068315003a7f604337fc0f6c91a4b98a7739e
--- wrap.c
+++ wrap.c
@@ -283,6 +283,9 @@ wrap_page(struct buffer *buffer, int width)
 		case LINE_DOWNLOAD_INFO:
 			wrap_one(buffer, prfx, l, width);
 			break;
+		case LINE_FRINGE:
+			/* never, ever wrapped */
+			break;
 		}
 
 		if (top_orig == l && buffer->top_line == NULL) {