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#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;
}
return TRUE;
}
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);
return 0;
}
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;
}
return 0;
}
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