Provide a config option to use the primary clipboard

When one uses a clipboard manager `wl-copy --clear` doesn't always work
correctly. Thus, one gathers a lot of secrets in the clipboard manager.
However, the primary clipboard normally isn't read by the clipboard
manager, making it an optimal target for secrets.

config

@@ -48,3 +48,6 @@
 
 # whether to send notifications about copied data via notify-send
 # notify="true"
+
+# whether to use the primary clipboard
+# use_primary="true"

tessen

@@ -404,18 +404,24 @@ wld_copy() {
  return 1
  fi
  fi
+
+ local wl_copy_opts
+ if [[ "${_TSN_USE_PRIMARY}" == "true" ]]; then
+ wl_copy_opts="-p"
+ fi
+
  # it would've been better to use, or at least provide an option, to paste
  # only once using `wl-copy -o` but web browsers don't work well with this
  # feature
  # https://github.com/bugaevc/wl-clipboard/issues/107
- printf "%s" "$1" | wl-copy
+ printf "%s" "$1" | wl-copy ${wl_copy_opts}
  if [[ $_TSN_NOTIFY == true ]] && is_installed notify-send; then
  notify-send -t $((tsn_cliptime * 1000)) \
  "data has been copied and will be cleared from the clipboard after $tsn_cliptime seconds"
  fi
  {
  sleep "$tsn_cliptime" || kill 0
- wl-copy --clear
+ wl-copy ${wl_copy_opts} --clear
  } > /dev/null 2>&1 &
 
  unset -v tsn_cliptime
@@ -676,6 +682,8 @@ parse_config() {
  _TSN_WEB_BROWSER="$val"
  elif [[ $key == "notify" ]]; then
  _TSN_NOTIFY="$val"
+ elif [[ $key == "use_primary" ]]; then
+ _TSN_USE_PRIMARY="$val"
  fi
  done
  fi