src/ui/tui.sh: New file

2 files changed, 179 insertions, 1 deletions

diff --git a/src/ui/local.mk b/src/ui/local.mk
index 636d0a5..6343a2f 100644
--- a/src/ui/local.mk
+++ b/src/ui/local.mk
@@ -1,2 +1,3 @@
 firman_SOURCES += \
-	src/ui/cli.sh
+	src/ui/cli.sh \
+	src/ui/tui.sh
diff --git a/src/ui/tui.sh b/src/ui/tui.sh
new file mode 100644
index 0000000..acac483
--- /dev/null
+++ b/src/ui/tui.sh
@@ -0,0 +1,177 @@
+# TUI user interface
+#
+# Copyright (C) 2015  Patrick "P. J." McDermott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+tui_init_ui()
+{
+	term_init
+	term_raw
+	term_noecho
+	term_hide_cursor
+	term_clear
+}
+
+tui_exit_ui()
+{
+	term_attr_reset
+	term_clear
+	term_show_cursor
+	term_echo
+	term_cooked
+}
+
+_tui_box()
+{
+	local w=${1}
+	local h=${2}
+	shift 2
+	local i=
+	local line=''
+
+	# Clear the screen and set the cursor position to center the box.
+	term_clear
+	term_cursor_position $(expr \( $(term_lines) - ${h} \) / 2) \
+		$(expr \( $(term_columns) - ${w} \) / 2)
+
+	# Build the line.
+	i=0
+	while [ ${i} -lt ${w} ]; do
+		line="${line} "
+		i=$(($i + 1))
+	done
+
+	# Draw white box background lines.
+	term_fg_color_set black
+	term_bg_color_set white
+	i=0
+	while [ ${i} -lt ${h} ]; do
+		printf '%s' "${line}"
+		term_cursor_back ${w}
+		term_cursor_down 1
+		i=$(($i + 1))
+	done
+
+	# Reset the cursor to the top-left corner of the box.
+	term_cursor_up ${h}
+
+	return 0
+}
+
+_tui_dialog()
+{
+	local lvl="${1}"
+	local fmt="${2}"
+	shift 2
+	local msg=''
+
+	# Format the message.
+	msg="$(printf "${fmt}" "${@}")"
+
+	# Draw the box.
+	_tui_box $(expr ${#msg} + 8) 5
+
+	# Draw an icon.
+	term_cursor_forward 2
+	case "${lvl}" in
+		warn)
+			term_fg_color_set yellow
+			term_write ' .'
+			term_cursor_back 2
+			term_cursor_down 1
+			term_attr_on underline
+			term_write '/!\'
+			term_attr_off underline
+			term_fg_color_set black
+			;;
+		err)
+			term_cursor_forward 1
+			term_fg_color_set red
+			term_attr_on underline
+			term_write ' '
+			term_attr_off underline
+			term_cursor_back 2
+			term_cursor_down 1
+			term_write '('
+			term_attr_on underline
+			term_write 'x'
+			term_attr_off underline
+			term_write ')'
+			term_fg_color_set black
+			;;
+	esac
+
+	# Write the message.
+	term_cursor_forward 1
+	term_write "${msg}"
+
+	# Draw a (selected) button.
+	term_cursor_back 4
+	term_cursor_down 2
+	term_attr_on reverse
+	term_write '[OK]'
+	term_attr_off reverse
+
+	while :; do
+		case "$(term_getch)" in
+			KEY_ENTER | KEY_SPACE) break;;
+		esac
+	done
+
+	return 0
+}
+
+tui_dbg()
+{
+	: No output.
+}
+
+tui_info()
+{
+	: No output.
+}
+
+tui_warn()
+{
+	local fmt="${1}"
+	shift 1
+
+	_tui_dialog warn "${fmt}" "${@}"
+}
+
+tui_err()
+{
+	local fmt="${1}"
+	shift 1
+
+	_tui_dialog err "${fmt}" "${@}"
+}
+
+tui_show_menu()
+{
+	local title="${1}"
+	shift 1
+
+	return 0
+}
+
+tui_show_prompt()
+{
+	local title="${1}"
+	local input=''
+	shift 1
+
+	return 0
+}