[ghex] HexWidget: Del/Bksp should only alter payload length in insert mode

[Logan Rathbone <larathbone src gnome org>]

commit 0cafa03f9b72aefc8755fcecc4d774357bea0681
Author: Logan Rathbone <poprocks gmail com>
Date:   Fri Jul 22 14:02:46 2022 -0500

    HexWidget: Del/Bksp should only alter payload length in insert mode

 src/gtkhex.c | 32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)
---
diff --git a/src/gtkhex.c b/src/gtkhex.c
index 763c8a4..f54e000 100644
--- a/src/gtkhex.c
+++ b/src/gtkhex.c
@@ -1813,9 +1813,18 @@ key_press_cb (GtkEventControllerKey *controller,
        switch(keyval)
        {
                case GDK_KEY_BackSpace:
-                       if (self->cursor_pos > 0) {
-                               hex_document_set_data (self->document, self->cursor_pos - 1,
-                                               0, 1, NULL, TRUE);
+                       if (self->cursor_pos > 0)
+                       {
+                               if (self->insert)
+                                       hex_document_set_data (self->document, self->cursor_pos - 1,
+                                                       0, 1, NULL, TRUE);
+                               else
+                               {
+                                       char zero = 0;
+                                       hex_document_set_data (self->document, self->cursor_pos - 1,
+                                                       1, 1, &zero, TRUE);
+                               }
+
                                if (self->selecting)
                                        self->selecting = FALSE;
                                hex_widget_set_cursor (self, self->cursor_pos - 1);
@@ -1824,9 +1833,20 @@ key_press_cb (GtkEventControllerKey *controller,
                        break;
 
                case GDK_KEY_Delete:
-                       if (self->cursor_pos < payload_size) {
-                               hex_document_set_data (self->document, self->cursor_pos,
-                                               0, 1, NULL, TRUE);
+                       if (self->cursor_pos < payload_size)
+                       {
+                               if (self->insert)
+                                       hex_document_set_data (self->document, self->cursor_pos,
+                                                       0, 1, NULL, TRUE);
+                               else
+                               {
+                                       char zero = 0;
+                                       hex_document_set_data (self->document, self->cursor_pos,
+                                                       1, 1, &zero, TRUE);
+                               }
+
+//                             hex_document_set_data (self->document, self->cursor_pos,
+//                                             0, self->insert, NULL, TRUE);
                                hex_widget_set_cursor (self, self->cursor_pos);
                                ret = GDK_EVENT_STOP;
                        }