From c53b179ee3e4fe45a90f578e1e63852a0a2d6df1 Mon Sep 17 00:00:00 2001
From: Andre Noll <maan@systemlinux.org>
Date: Fri, 23 Sep 2011 14:04:23 +0200
Subject: [PATCH] Add gsu_gui.

The dialog-based shell library for earth-shaking graphical user
interfaces that don't suck.

Its main entry function gsu_gui() allows to pass a tree to control
the menus.
---
 misc/gsu/gui | 207 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 207 insertions(+)
 create mode 100644 misc/gsu/gui

diff --git a/misc/gsu/gui b/misc/gsu/gui
new file mode 100644
index 0000000..30c95a4
--- /dev/null
+++ b/misc/gsu/gui
@@ -0,0 +1,207 @@
+#!/bin/bash
+
+if [[ $(type -t gsu_is_a_number) != "function" ]]; then
+	GSU_DIR=${GSU_DIR:=$HOME/.gsu}
+	. $GSU_DIR/common || exit 1
+fi
+
+export GSU_NODE_NAME_PATTERN='[a-zA-Z_]'
+
+get_geometry()
+{
+	local x y
+	result="$(stty size)"
+	if (($? != 0)); then
+		gsu_msg "fatal: could not get terminal geometry"
+		exit 1
+	fi
+	x="${result#* }"
+	y="${result%% *}"
+	(($x > 190)) && x=190
+	result="$y $x"
+}
+
+gsu_infobox()
+{
+	get_geometry
+	dialog --infobox "$1" $result
+}
+
+gsu_checklist_all_on()
+{
+	local header="$1"
+	local items="$2"
+	local i state opts num=0
+
+	get_geometry
+	ops="$result 16"
+	for i in $items; do
+		let num++
+		opts+=" $i $num on"
+	done
+	result=$(dialog --checklist "$header" $opts 3>&1 1>&2 2>&3 3>&-)
+	ret="$?"
+}
+
+gsu_radiolist()
+{
+	local header="$1"
+	local selected_item="$2"
+	local items="$3"
+	local i state ops num=0
+
+	get_geometry
+	ops="$result 16"
+	for i in $items; do
+		let num++
+		if [[ "$i" == "$selected_item" ]]; then
+			state="on"
+		else
+			state="off"
+		fi
+		ops+=" $i $num $state"
+	done
+	result=$(dialog --radiolist "$header" $ops 3>&1 1>&2 2>&3 3>&-)
+	ret="$?"
+}
+
+gsu_inputbox()
+{
+	local g text="$1" init="$2"
+
+	get_geometry
+	g="$result"
+	result="$(dialog --inputbox "$text" $g "$init" 3>&1 1>&2 2>&3 3>&-)"
+	ret="$?"
+}
+
+gsu_textbox()
+{
+	local file="$1"
+
+	get_geometry
+	dialog --textbox "$file" $result
+}
+
+# dialog segfaults if message is too long. Hence we always use a temporary file
+gsu_msgbox()
+{
+	local tmp="$(mktemp gsu_msgbox.XXXXXXXXXX)"
+
+	if (($? != 0)); then
+		dialog --msgbox "mktemp error" 0 0
+		return
+	fi
+	echo "$1" > "$tmp"
+	gsu_textbox "$tmp"
+	rm -f "$tmp"
+}
+
+gsu_cmd_output_box()
+{
+	local tmp="$(mktemp)"
+
+	if (($? != 0)); then
+		dialog --msgbox "mktemp error" 0 0
+		return
+	fi
+	$@ > "$tmp" 2>&1
+	echo "exit code: $?" >> "$tmp"
+	gsu_textbox "$tmp"
+	rm -f "$tmp"
+}
+
+gsu_yesno()
+{
+	local text="$1"
+
+	get_geometry
+	dialog --yesno "$text" $result
+	ret=$?
+	if (($ret == 0)); then
+		result="yes"
+	elif (($ret == 1)); then
+		result="no"
+	else
+		result=
+	fi
+}
+
+gsu_menu()
+{
+	local header="${1:-root}"
+	local items="$2"
+	local i state opts num=0
+
+	get_geometry
+	opts="$result 16"
+	for i in $items; do
+		let num++
+		opts+=" $i $num"
+	done
+	result="$(dialog --menu "$header" $opts 3>&1 1>&2 2>&3 3>&-)"
+	ret="$?"
+}
+
+_get_level()
+{
+	local tmp="${1%%$GSU_NODE_NAME_PATTERN*}"
+	result="${#tmp}"
+}
+
+_get_subtree()
+{
+	local tree="$1" root="${2%/}"
+	local TAB='	'
+
+	first="$(grep -n "$root/" <<< "$tree")"
+	[[ -z "$first" ]] && return
+
+	line_num="${first%%:*}"
+	_get_level "${first#*:}"
+	level="$result"
+
+	#echo "line: $line_num, root: $root, indent level: $level"
+	result="$(sed -e "1,${line_num}d;" <<< "$tree" \
+		| sed -e "/^$TAB\{1,$level\}$GSU_NODE_NAME_PATTERN/,\$d" \
+		| sed -e "/^$TAB\{$(($level + 2))\}/d")"
+	ret="$level"
+}
+
+_get_root_nodes()
+{
+	local tree="$1" TAB='	'
+
+	result="$(grep "^${TAB}${GSU_NODE_NAME_PATTERN}" <<< "$tree")"
+}
+
+_browse()
+{
+	local header="$1" old_header
+	local tree="$2" subtree="$3"
+
+	while :; do
+		gsu_menu "$header" "$subtree"
+		(($ret != 0)) && return
+		[[ -z "$result" ]] && return
+		if [[ "${result%/}" != "$result" ]]; then
+			old_header="$header"
+			header="$result"
+			_get_subtree "$tree" "$header"
+			_browse "$header" "$tree" "$result"
+			header="$old_header"
+			continue
+		fi
+		eval ${gsu_name}_$result
+	done
+}
+
+gsu_gui()
+{
+	local tree="$1" subtree
+
+	_gsu_setup
+	_get_root_nodes "$tree"
+	subtree="$result"
+	_browse "$gsu_name main menu" "$tree" "$subtree"
+}
-- 
2.39.5