From d230ae921862fc77be58a96b79ee87b29bf7488b Mon Sep 17 00:00:00 2001
From: Marty Oehme <marty.oehme@gmail.com>
Date: Fri, 31 Jan 2020 10:19:25 +0100
Subject: [PATCH] Add initial shell theming processor

Uses ANSI escape sequences to switch all open terminals to desired
theme. Does not yet include capability to permanently set themes, since
this would have to be handled either through xresources or dependent on
the individual terminals color settings (e.g. `.config/alacritty.yml`
for alacritty). Needs further investigation.
---
 theme_shell | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100755 theme_shell

diff --git a/theme_shell b/theme_shell
new file mode 100755
index 0000000..7235e9f
--- /dev/null
+++ b/theme_shell
@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+readonly dependency=("chriskempson/base16-shell")
+
+path="$1"
+package="$2"
+theme="$3"
+permanent="$4"
+
+file_exists() {
+  if [[ -f "$1" ]]; then
+    true
+  else
+    false
+  fi
+}
+check_tfile() {
+  if ! file_exists "$tfile"; then
+    dbg_msg="$dbg_msg theme $theme for rofi not found.\n"
+    exit 1
+  fi
+}
+
+theme_shell() {
+  dbg_msg="SHELL: $package - "
+  tfile="$path/$package/scripts/base16-$theme.sh"
+
+  check_tfile
+
+  if [[ "$permanent" == "true" ]]; then set_shell_theme; fi
+  switch_shell_theme
+
+  [[ "$DEBUG" == true ]] && echo "$dbg_msg"
+}
+
+switch_shell_theme() {
+  # source "$tfile" -- works, but only for current terminal
+  # ANSI solution from: https://www.reddit.com/r/unixporn/comments/80nidw/bspwm_script_to_change_all_themes_on_demand/duxjw1e/
+  # only we can make use of kempson's scripts and send them to all terminals, so we don't have to manually
+  # sed the colors like sed -nE 's/^(color[0-9|_foreground|_background]+)="(.+)".*$/\1,\2/gp' $tfile
+  for term in /dev/pts/[0-9]*; do
+    # shellcheck source=/dev/null
+    source "$tfile" >"$term"
+  done
+  dbg_msg="$dbg_msg Set theme $theme\n"
+}
+
+set_shell_theme() {
+  dbg_msg="$dbg_msg -- shell theme permanent setting not implemented."
+}
+
+if printf '%s\n' "${dependency[@]}" | grep -q -P "^$package$"; then
+  theme_shell
+else
+  printf "Processor does not work for %s, please use another." "$package"
+fi