Option to set the characters considered word separators in copy mode, from

Micah Cowan.

cmd-set-option.c

@@ -165,6 +165,7 @@ const struct set_option_entry set_window_option_table[] = {
 	{ "window-status-current-format", SET_OPTION_STRING, 0, 0, NULL },
 	{ "window-status-fg", SET_OPTION_COLOUR, 0, 0, NULL },
 	{ "window-status-format", SET_OPTION_STRING, 0, 0, NULL },
+	{ "word-separators", SET_OPTION_STRING, 0, 0, NULL },
 	{ "xterm-keys", SET_OPTION_FLAG, 0, 0, NULL },
 	{ NULL, 0, 0, 0, NULL }
 };

tmux.1

@@ -649,11 +649,13 @@ The following keys are supported as appropriate for the mode:
 .Pp
 The next and previous word keys use space and the
 .Ql - ,
-.Ql _ ,
+.Ql _
-.Ql \&"
 and
 .Ql @
-characters as word delimiters.
+characters as word delimiters by default, but this can be adjusted by
+setting the
+.Em word-separators
+window option.
 Next word moves to the start of the next word, next word end to the end of the
 next word and previous word to the start of the previous word.
 The three next and previous space keys work similarly but use a space alone as
@@ -2031,6 +2033,13 @@ Like
 .Ar window-status-format ,
 but is the format used when the window is the current window.
 .Pp
+.It Ic word-separators Ar string
+Sets the window's conception of what characters are considered word
+separators, for the purposes of the next and previous word commands in
+copy mode.
+The default is
+.Ql \ -_@ .
+.Pp
 .It Xo Ic xterm-keys
 .Op Ic on | off
 .Xc

tmux.c

@@ -418,6 +418,7 @@ main(int argc, char **argv)
 	options_set_number(wo, "window-status-fg", 8);
 	options_set_string(wo, "window-status-format", "#I:#W#F");
 	options_set_string(wo, "window-status-current-format", "#I:#W#F");
+	options_set_string(wo, "word-separators", " -_@");
 	options_set_number(wo, "xterm-keys", 0);
 	options_set_number(wo, "remain-on-exit", 0);
 	options_set_number(wo, "synchronize-panes", 0);

window-copy.c

@@ -226,7 +226,7 @@ window_copy_resize(struct window_pane *wp, u_int sx, u_int sy)
 void
 window_copy_key(struct window_pane *wp, struct client *c, int key)
 {
-	const char			*word_separators = " -_@";
+	const char			*word_separators;
 	struct window_copy_mode_data	*data = wp->modedata;
 	struct screen			*s = &data->screen;
 	u_int				 n;
@@ -356,15 +356,21 @@ window_copy_key(struct window_pane *wp, struct client *c, int key)
 		window_copy_cursor_next_word_end(wp, " ");
 		break;
 	case MODEKEYCOPY_NEXTWORD:
+		word_separators =
+		    options_get_string(&wp->window->options, "word-separators");
 		window_copy_cursor_next_word(wp, word_separators);
 		break;
 	case MODEKEYCOPY_NEXTWORDEND:
+		word_separators =
+		    options_get_string(&wp->window->options, "word-separators");
 		window_copy_cursor_next_word_end(wp, word_separators);
 		break;
 	case MODEKEYCOPY_PREVIOUSSPACE:
 		window_copy_cursor_previous_word(wp, " ");
 		break;
 	case MODEKEYCOPY_PREVIOUSWORD:
+		word_separators =
+		    options_get_string(&wp->window->options, "word-separators");
 		window_copy_cursor_previous_word(wp, word_separators);
 		break;
 	case MODEKEYCOPY_SEARCHUP:
@@ -1271,30 +1277,36 @@ window_copy_cursor_next_word(struct window_pane *wp, const char *separators)
 	struct window_copy_mode_data	*data = wp->modedata;
 	struct screen			*base_s = &wp->base;
 	u_int				 px, py, xx, yy;
+	int				 expected = 0;
 
 	px = data->cx;
 	py = screen_hsize(base_s) + data->cy - data->oy;
 	xx = window_copy_find_length(wp, py);
 	yy = screen_hsize(base_s) + screen_size_y(base_s) - 1;
 
-	/* Are we in a word? Skip it! */
+	/*
-	while (!window_copy_in_set(wp, px, py, separators))
+	 * First skip past any nonword characters and then any word characters.
-		px++;
+	 *
+	 * expected is initially set to 0 for the former and then 1 for the
+	 * latter.
+	 */
+	do {
+		while (px > xx ||
+		    window_copy_in_set(wp, px, py, separators) == expected) {
+			/* Move down if we're past the end of the line. */
+			if (px > xx) {
+				if (py == yy)
+					return;
+				window_copy_cursor_down(wp, 0);
+				px = 0;
 
-	/* Find the start of a word. */
+				py = screen_hsize(base_s) + data->cy - data->oy;
-	while (px > xx || window_copy_in_set(wp, px, py, separators)) {
+				xx = window_copy_find_length(wp, py);
-		/* Past the end of the line? Nothing but spaces. */
+			} else
-		if (px > xx) {
+				px++;
-			if (py == yy)
+		}
-				return;
+		expected = !expected;
-			window_copy_cursor_down(wp, 0);
+	} while (expected == 1);
-			px = 0;
-
-			py = screen_hsize(base_s) + data->cy - data->oy;
-			xx = window_copy_find_length(wp, py);
-		} else
-			px++;
-	}
 
 	window_copy_update_cursor(wp, px, data->cy);
 	if (window_copy_update_selection(wp))
@@ -1307,30 +1319,36 @@ window_copy_cursor_next_word_end(struct window_pane *wp, const char *separators)
 	struct window_copy_mode_data	*data = wp->modedata;
 	struct screen			*base_s = &wp->base;
 	u_int				 px, py, xx, yy;
+	int				 expected = 1;
 
 	px = data->cx;
 	py = screen_hsize(base_s) + data->cy - data->oy;
 	xx = window_copy_find_length(wp, py);
 	yy = screen_hsize(base_s) + screen_size_y(base_s) - 1;
 
-	/* Are we on spaces? Skip 'em! */
+	/*
-	while (px > xx || window_copy_in_set(wp, px, py, separators)) {
+	 * First skip past any word characters, then any nonword characters.
-		/* Nothing but spaces past the end of the line, so move down. */
+	 *
-		if (px > xx) {
+	 * expected is initially set to 1 for the former and then 0 for the
-			if (py == yy)
+	 * latter.
-				return;
+	 */
-			window_copy_cursor_down(wp, 0);
+	do {
-			px = 0;
+		while (px > xx ||
+		    window_copy_in_set(wp, px, py, separators) == expected) {
+			/* Move down if we're past the end of the line. */
+			if (px > xx) {
+				if (py == yy)
+					return;
+				window_copy_cursor_down(wp, 0);
+				px = 0;
 
-			py = screen_hsize(base_s) + data->cy - data->oy;
+				py = screen_hsize(base_s) + data->cy - data->oy;
-			xx = window_copy_find_length(wp, py);
+				xx = window_copy_find_length(wp, py);
-		} else
+			} else
-			px++;
+				px++;
-	}
+		}
-
+		expected = !expected;
-	/* Find the end of this word. */
+	} while (expected == 0);
-	while (!window_copy_in_set(wp, px, py, separators))
-		px++;
 
 	window_copy_update_cursor(wp, px, data->cy);
 	if (window_copy_update_selection(wp))