From d33ed342af50b66c7c49c2843d7495febfd663e9 Mon Sep 17 00:00:00 2001
From: Christian Hergert <chergert@redhat.com>
Date: Wed, 28 Jul 2021 17:49:40 -0700
Subject: [PATCH 1/1] view: fix decrement of negative numbers

Fixes #117
---
 gtksourceview/gtksourceview.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/gtksourceview/gtksourceview.c b/gtksourceview/gtksourceview.c
index e10584aa..377cdd8d 100644
--- a/gtksourceview/gtksourceview.c
+++ b/gtksourceview/gtksourceview.c
@@ -360,61 +360,72 @@ gtk_source_view_move_to_matching_bracket (GtkSourceView *view,
 			gtk_text_buffer_move_mark (buffer, insert_mark, &bracket_match);
 		}
 		else
 		{
 			gtk_text_buffer_place_cursor (buffer, &bracket_match);
 		}
 
 		gtk_text_view_scroll_mark_onscreen (text_view, insert_mark);
 	}
 }
 
 static void
 gtk_source_view_change_number (GtkSourceView *view,
 			       gint           count)
 {
 	GtkTextView *text_view = GTK_TEXT_VIEW (view);
 	GtkTextBuffer *buffer;
 	GtkTextIter start, end;
 	gchar *str;
 
 	buffer = gtk_text_view_get_buffer (text_view);
 	if (!GTK_SOURCE_IS_BUFFER (buffer))
 	{
 		return;
 	}
 
 	if (!gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
 	{
 		if (!gtk_text_iter_starts_word (&start))
 		{
+			GtkTextIter prev;
+
 			gtk_text_iter_backward_word_start (&start);
+
+			/* Include the negative sign if there is one.
+			 * https://gitlab.gnome.org/GNOME/gtksourceview/-/issues/117
+			 */
+			prev = start;
+			if (gtk_text_iter_backward_char (&prev) && gtk_text_iter_get_char (&prev) == '-')
+			{
+				start = prev;
+			}
 		}
 
 		if (!gtk_text_iter_ends_word (&end))
 		{
 			gtk_text_iter_forward_word_end (&end);
 		}
 	}
 
 	str = gtk_text_buffer_get_text (buffer, &start, &end, FALSE);
 
 	if (str != NULL && *str != '\0')
 	{
 		gchar *p;
 		gint64 n;
 		glong len;
 
 		len = gtk_text_iter_get_offset (&end) - gtk_text_iter_get_offset (&start);
 		g_assert (len > 0);
 
 		n = g_ascii_strtoll (str, &p, 10);
 
 		/* do the action only if strtoll succeeds (p != str) and
 		 * the whole string is the number, e.g. not 123abc
 		 */
 		if ((p - str) == len)
 		{
 			gchar *newstr;
 
 			newstr = g_strdup_printf ("%"G_GINT64_FORMAT, (n + count));
 
-- 
2.39.1