From cd89000c1d75d0cfec28cf7e81b06f80a43ea093 Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Mon, 30 May 2022 13:00:18 +0000
Subject: Add a way for lines added to copy mode to be passed through the
 parser to handle escape sequences and use it for run-shell, GitHub issue
 3156.

---
 window-copy.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++------------
 1 file changed, 50 insertions(+), 13 deletions(-)

(limited to 'window-copy.c')

diff --git a/window-copy.c b/window-copy.c
index 7c55b0f2..03070556 100644
--- a/window-copy.c
+++ b/window-copy.c
@@ -222,6 +222,8 @@ struct window_copy_mode_data {
 
 	struct screen	*backing;
 	int		 backing_written; /* backing display started */
+	struct screen	*writing;
+	struct input_ctx *ictx;
 
 	int		 viewmode;	/* view mode entered */
 
@@ -467,13 +469,16 @@ window_copy_view_init(struct window_mode_entry *wme,
 	struct window_pane		*wp = wme->wp;
 	struct window_copy_mode_data	*data;
 	struct screen			*base = &wp->base;
-	struct screen			*s;
+	u_int				 sx = screen_size_x(base);
 
 	data = window_copy_common_init(wme);
 	data->viewmode = 1;
 
-	data->backing = s = xmalloc(sizeof *data->backing);
-	screen_init(s, screen_size_x(base), screen_size_y(base), UINT_MAX);
+	data->backing = xmalloc(sizeof *data->backing);
+	screen_init(data->backing, sx, screen_size_y(base), UINT_MAX);
+	data->writing = xmalloc(sizeof *data->writing);
+	screen_init(data->writing, sx, screen_size_y(base), 0);
+	data->ictx = input_init(NULL, NULL, NULL);
 	data->mx = data->cx;
 	data->my = screen_hsize(data->backing) + data->cy - data->oy;
 	data->showmark = 0;
@@ -492,6 +497,12 @@ window_copy_free(struct window_mode_entry *wme)
 	free(data->searchstr);
 	free(data->jumpchar);
 
+	if (data->writing != NULL) {
+		screen_free(data->writing);
+		free(data->writing);
+	}
+	if (data->ictx != NULL)
+		input_free(data->ictx);
 	screen_free(data->backing);
 	free(data->backing);
 
@@ -500,41 +511,67 @@ window_copy_free(struct window_mode_entry *wme)
 }
 
 void
-window_copy_add(struct window_pane *wp, const char *fmt, ...)
+window_copy_add(struct window_pane *wp, int parse, const char *fmt, ...)
 {
 	va_list	ap;
 
 	va_start(ap, fmt);
-	window_copy_vadd(wp, fmt, ap);
+	window_copy_vadd(wp, parse, fmt, ap);
 	va_end(ap);
 }
 
+static void
+window_copy_init_ctx_cb(__unused struct screen_write_ctx *ctx,
+    struct tty_ctx *ttyctx)
+{
+	memcpy(&ttyctx->defaults, &grid_default_cell, sizeof ttyctx->defaults);
+	ttyctx->palette = NULL;
+	ttyctx->redraw_cb = NULL;
+	ttyctx->set_client_cb = NULL;
+	ttyctx->arg = NULL;
+}
+
 void
-window_copy_vadd(struct window_pane *wp, const char *fmt, va_list ap)
+window_copy_vadd(struct window_pane *wp, int parse, const char *fmt, va_list ap)
 {
 	struct window_mode_entry	*wme = TAILQ_FIRST(&wp->modes);
 	struct window_copy_mode_data	*data = wme->data;
 	struct screen			*backing = data->backing;
-	struct screen_write_ctx	 	 back_ctx, ctx;
+	struct screen			*writing = data->writing;
+	struct screen_write_ctx	 	 writing_ctx, backing_ctx, ctx;
 	struct grid_cell		 gc;
 	u_int				 old_hsize, old_cy;
+	u_int				 sx = screen_size_x(backing);
+	char				*text;
 
-	memcpy(&gc, &grid_default_cell, sizeof gc);
+	if (parse) {
+		vasprintf(&text, fmt, ap);
+		screen_write_start(&writing_ctx, writing);
+		screen_write_reset(&writing_ctx);
+		input_parse_screen(data->ictx, writing, window_copy_init_ctx_cb,
+		    data, text, strlen(text));
+		free(text);
+	}
 
 	old_hsize = screen_hsize(data->backing);
-	screen_write_start(&back_ctx, backing);
+	screen_write_start(&backing_ctx, backing);
 	if (data->backing_written) {
 		/*
 		 * On the second or later line, do a CRLF before writing
 		 * (so it's on a new line).
 		 */
-		screen_write_carriagereturn(&back_ctx);
-		screen_write_linefeed(&back_ctx, 0, 8);
+		screen_write_carriagereturn(&backing_ctx);
+		screen_write_linefeed(&backing_ctx, 0, 8);
 	} else
 		data->backing_written = 1;
 	old_cy = backing->cy;
-	screen_write_vnputs(&back_ctx, 0, &gc, fmt, ap);
-	screen_write_stop(&back_ctx);
+	if (parse)
+		screen_write_fast_copy(&backing_ctx, writing, 0, 0, sx, 1);
+	else {
+		memcpy(&gc, &grid_default_cell, sizeof gc);
+		screen_write_vnputs(&backing_ctx, 0, &gc, fmt, ap);
+	}
+	screen_write_stop(&backing_ctx);
 
 	data->oy += screen_hsize(data->backing) - old_hsize;
 
-- 
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