From 79a0a20889a553cbe5e7a23b9928e33d9354d4ee Mon Sep 17 00:00:00 2001
From: Benjamin Franzke <benjaminfranzke@googlemail.com>
Date: Thu, 22 Sep 2011 22:22:20 +0200
Subject: Add input support using readline

---
 src/io.c | 133 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 src/io.c

(limited to 'src/io.c')

diff --git a/src/io.c b/src/io.c
new file mode 100644
index 0000000..906cc88
--- /dev/null
+++ b/src/io.c
@@ -0,0 +1,133 @@
+#include <stdio.h>
+#include <string.h>
+
+#include <glib.h>
+#include <readline/readline.h>
+#include <readline/history.h>
+
+#include <unistd.h>
+#include <termios.h>
+
+#include "io.h"
+#include "cmumble.h"
+
+/* Readline has no user_data in callbacks,
+ * so set global_rl_user_data before dispatching
+ * (and unset afterwards - so we can assert user_data,
+ *  and find where callbacks are called, that we didnt
+ *  expect)
+ */
+static gpointer global_rl_user_data = NULL;
+
+static gboolean
+read_cb(GIOChannel *source, GIOCondition condition, gpointer data)
+{
+	struct context *ctx = data;
+
+	if (condition & G_IO_IN) {
+		global_rl_user_data = ctx;
+		rl_callback_read_char();
+		global_rl_user_data = NULL;
+	}
+}
+
+static void
+print_preserve_prompt(const gchar *string)
+{
+	int point;
+	char *line;
+
+	/* FIXME */
+	gboolean preserve = (rl_readline_state & RL_STATE_TERMPREPPED);
+	//preserve = 1;
+
+	if (preserve) {
+		point = rl_point;
+		line = rl_copy_text(0, rl_end);
+		rl_save_prompt();
+		rl_replace_line("", 0);
+		rl_redisplay();
+	}
+
+	fputs(string, stdout);
+
+	if (preserve) {
+		rl_restore_prompt();
+		rl_replace_line(line, 0);
+		rl_point = point;
+		rl_redisplay();
+		free(line);
+	}
+}
+
+static void
+process_line(char *line)
+{
+	struct context *ctx = global_rl_user_data;
+
+	g_assert(global_rl_user_data);
+	
+	rl_reset_line_state();
+
+	if (line == NULL) {
+		printf("quit");
+		rl_already_prompted = 1;
+		rl_crlf();
+		g_main_loop_quit(ctx->loop);
+		return;
+	}
+
+	if (strcmp(line, "quit") == 0) {
+		rl_already_prompted = 1;
+		g_main_loop_quit(ctx->loop);
+	} else if (strcmp(line, "clear") == 0) {
+		rl_clear_screen(0,0);
+		rl_reset_line_state();
+	} else
+		g_print("readline: %s\n", line);
+
+	if (strlen(line))
+		add_history(line);
+}
+
+int
+cmumble_io_init(struct context *ctx)
+{
+	struct termios term;
+	
+	ctx->io.input_channel = g_io_channel_unix_new(STDIN_FILENO);
+	
+	g_io_add_watch(ctx->io.input_channel, G_IO_IN | G_IO_HUP,
+		       read_cb, ctx);
+
+	if (tcgetattr(STDIN_FILENO, &term) < 0) {
+		g_printerr("tcgetattr failed");
+		return -1;
+	}
+
+	ctx->io.term = term;
+	term.c_lflag &= ~ICANON;
+	term.c_cc[VTIME] = 1;
+
+	if (tcsetattr(STDIN_FILENO, TCSANOW, &term) < 0) {
+		g_printerr("tcsetattr failed");
+		return -1;
+	}
+
+	rl_callback_handler_install("cmumble> ", process_line);
+
+	g_set_print_handler(print_preserve_prompt);
+}
+
+int
+cmumble_io_fini(struct context *ctx)
+{
+	rl_callback_handler_remove();
+	g_io_channel_unref(ctx->io.input_channel);
+
+	if (tcsetattr(STDIN_FILENO, TCSANOW, &ctx->io.term) < 0) {
+		g_printerr("tcsetattr failed");
+		return -1;
+	}
+
+}
-- 
cgit