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Enable Completion and print the results in MSG window #5

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Enable Completion and print the results in MSG window #5

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38 changes: 36 additions & 2 deletions rlncurses.c
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Original file line number Diff line number Diff line change
Expand Up @@ -62,6 +62,13 @@ static unsigned char input;
// Used to signal "no more input" after feeding a character to readline
static bool input_avail = false;

// stream passed to RL to get its output
static FILE * output_stream;
// the mem buffer, where the stream will be written
static char * output_buffer;
// the size of the buffer
static size_t output_buffer_size;

// Calculates the cursor column for the readline window in a way that supports
// multibyte, multi-column and combining characters. readline itself calculates
// this as part of its default redisplay function and does not export the
Expand Down Expand Up @@ -281,9 +288,18 @@ static void deinit_ncurses(void)

static void init_readline(void)
{
char buf[256];
// Disable completion. TODO: Is there a more robust way to do this?
if (rl_bind_key('\t', rl_insert))
fail_exit("Invalid key passed to rl_bind_key()");
//if (rl_bind_key('\t', rl_insert))
// fail_exit("Invalid key passed to rl_bind_key()");

// disable completion
//strcpy(buf,"set disable-completion on");
//rl_parse_and_bind(buf);

// disable colored results in completion
strcpy(buf,"set colored-stats off");
rl_parse_and_bind(buf);

// Let ncurses do all terminal and signal handling
rl_catch_signals = 0;
Expand All @@ -298,6 +314,12 @@ static void init_readline(void)
// rl_callback_read_char() (which is almost always the case).
rl_change_environment = 0;

// redirect RL output to our memory buffered stream
output_stream = open_memstream(&output_buffer, &output_buffer_size);
if (!output_stream)
fail_exit("Cannot open memstream for RL output buffer\n");
rl_outstream = output_stream;

// Handle input by manually feeding characters to readline
rl_getc_function = readline_getc;
rl_input_available_hook = readline_input_avail;
Expand All @@ -321,6 +343,18 @@ int main(void)
init_readline();

do {
// check if there is something from RL to be printed
// flush the RL output stream, so it's saved in the buffer and the size is updated
fflush(output_stream);
if (output_buffer_size) {
output_buffer[output_buffer_size] = 0;
wprintw(msg_win, output_buffer);
wnoutrefresh(msg_win);
wrefresh(cmd_win); // keep the pointer in cmd_win
// this will reset the buffer, so we wont get duplicate text (see open_memstream man page)
fseek(output_stream, 0, SEEK_SET);
}

// Using getch() here instead would refresh stdscr, overwriting the
// initial contents of the other windows on startup
int c = wgetch(cmd_win);
Expand Down