client: Introduce display files

The purpose of these files is to encapsulate all of
the display related functionality

Makefile.am

@@ -87,6 +87,7 @@ dist_sysconf_DATA = src/iwd.conf
 
 client_iwctl_SOURCES = client/main.c \
 			readline/readline.h readline/history.h \
+			client/display.h client/display.c \
 			client/dbus-proxy.h client/dbus-proxy.c
 client_iwctl_LDADD = ell/libell-internal.la -lreadline
 

client/display.c

@@ -0,0 +1,98 @@
+/*
+ *
+ *  Wireless daemon for Linux
+ *
+ *  Copyright (C) 2017  Intel Corporation. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <ell/ell.h>
+#include <readline/history.h>
+#include <readline/readline.h>
+#include <stdio.h>
+
+#include "display.h"
+
+#define IWD_PROMPT COLOR_GREEN "[iwd]" COLOR_OFF "# "
+#define LINE_LEN   81
+
+static struct l_queue *display_types;
+static struct l_io *io;
+static char dashed_line[LINE_LEN];
+static char empty_line[LINE_LEN];
+
+static void readline_callback(char *prompt)
+{
+	l_free(prompt);
+}
+
+static bool read_handler(struct l_io *io, void *user_data)
+{
+	rl_callback_read_char();
+
+	return true;
+}
+
+static void disconnect_callback(struct l_io *io, void *user_data)
+{
+	l_main_exit();
+}
+
+void display_enable_cmd_prompt(void)
+{
+	io = l_io_new(fileno(stdin));
+
+	l_io_set_read_handler(io, read_handler, NULL, NULL);
+	l_io_set_disconnect_handler(io, disconnect_callback, NULL, NULL);
+
+	rl_set_prompt(IWD_PROMPT);
+}
+
+void display_disable_cmd_prompt(void)
+{
+	rl_set_prompt("");
+	rl_crlf();
+}
+
+void display_init(void)
+{
+	memset(&dashed_line, '-', sizeof(dashed_line) - 1);
+	memset(&empty_line, ' ', sizeof(empty_line) - 1);
+
+	display_types = l_queue_new();
+
+	setlinebuf(stdout);
+
+	rl_erase_empty_line = 1;
+	rl_callback_handler_install("Waiting for IWD to appear...",
+							readline_callback);
+	rl_redisplay();
+}
+
+void display_exit(void)
+{
+	rl_callback_handler_remove();
+
+	l_io_destroy(io);
+
+	l_queue_destroy(display_types, NULL);
+	display_types = NULL;
+}

client/display.h

@@ -0,0 +1,36 @@
+/*
+ *
+ *  Wireless daemon for Linux
+ *
+ *  Copyright (C) 2017  Intel Corporation. All rights reserved.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#define COLOR_BOLDGRAY	"\x1B[1;30m"
+#define COLOR_GRAY	"\x1b[37m"
+#define COLOR_GREEN	"\x1b[32m"
+#define COLOR_RED	"\x1B[0;91m"
+#define COLOR_OFF	"\x1B[0m"
+#define CHECK		"\u2714"
+#define CLEAR_SCREEN	"\033[2J"
+#define MARGIN		"  "
+
+void display_enable_cmd_prompt(void);
+void display_disable_cmd_prompt(void);
+
+void display_init(void);
+void display_exit(void);