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/*
* Used by GS-NETCAT.
*
* Console Display is a display area for log messages and other messages.
* Normally 3 rows and with a history (to scroll up/down).
*
* This is where log messages are being displayed.
*/
#include "common.h"
#include "console_display.h"
#include "pkt_mgr.h"
#include "utils.h"
int
GS_condis_init(GS_CONDIS *cd, int fd, int rows)
{
memset(cd, 0, sizeof *cd);
cd->rows = rows;
cd->fd = fd;
cd->y = 25 - rows;
cd->max_char = 80;
cd->pos_display = (cd->pos_add + CONDIS_MAX_HISTORY - cd->rows) % CONDIS_MAX_HISTORY;
return 0;
}
void
GS_condis_clear(GS_CONDIS *cd)
{
cd->entries = 0;
cd->pos_add = 0;
cd->pos_display = (cd->pos_add + CONDIS_MAX_HISTORY - cd->rows) % CONDIS_MAX_HISTORY;
cd->is_redraw_needed = 1;
}
void
GS_condis_add(GS_CONDIS *cd, int level, const char *str)
{
size_t len;
struct condis_line *cdl = &cd->cdl[cd->pos_add];
DEBUGF("%s\n", str);
len = MIN(sizeof cdl->line - 1, strlen(str));
memcpy(cdl->line, str, len);
cdl->line[len] = 0x00;
switch (level)
{
case GS_PKT_APP_LOG_TYPE_ALERT:
cdl->color_str = "\x1B[31;1m"; // BRIGHT RED
break;
case GS_PKT_APP_LOG_TYPE_NOTICE:
cdl->color_str = "\x1B[0m\x1B[33m"; // Reset brightness. Yellow
break;
case GS_PKT_APP_LOG_TYPE_INFO:
cdl->color_str = "\x1B[0m\x1B[32m"; // Reset brightness. green
break;
default:
cdl->color_str = NULL; // default color
break;
}
cd->pos_add = (cd->pos_add + 1) % CONDIS_MAX_HISTORY;
cd->pos_display = (cd->pos_add + CONDIS_MAX_HISTORY - cd->rows) % CONDIS_MAX_HISTORY;
cd->entries = MIN(CONDIS_MAX_HISTORY, cd->entries + 1);
cd->is_redraw_needed = 1;
}
void
GS_condis_printf(GS_CONDIS *cd, int level, const char *fmt, ...)
{
va_list ap;
char buf[CONDIS_LINE_MAX_LEN];
va_start(ap, fmt);
vsnprintf(buf, sizeof buf, fmt, ap);
va_end(ap);
GS_condis_add(cd, level, buf);
}
// Add "<TIMESTAMP> <str>" to console display.
void
GS_condis_log(GS_CONDIS *cd, int level, const char *str)
{
char buf[1024];
snprintf(buf, sizeof buf, "%s %s", GS_logtime(), str);
GS_condis_add(cd, level, buf);
}
/*
* Set the position and max line length.
* Normally called if the dispaly is resized.
*/
void
GS_condis_pos(GS_CONDIS *cd, int y, int max_char)
{
cd->y = y;
// Always have space for \0
cd->max_char = MIN(CONDIS_LINE_MAX_LEN - 1, max_char);
cd->is_redraw_needed = 1;
}
void
GS_condis_up(GS_CONDIS *cd)
{
int apos = cd->pos_add;
int dpos = cd->pos_display;
if (dpos >= apos)
apos += CONDIS_MAX_HISTORY;
// Here: apos is larger
if (dpos == apos)
return; // Cant scroll any further. Out of buffer.
if (cd->entries <= cd->rows)
return; // Not enough entries to scroll.
int max_scroll;
int scroll;
max_scroll = cd->entries - (apos - dpos);
scroll = MIN(cd->rows, max_scroll);
cd->pos_display = (dpos + CONDIS_MAX_HISTORY - scroll) % CONDIS_MAX_HISTORY;
cd->is_redraw_needed = 1;
}
void
GS_condis_down(GS_CONDIS *cd)
{
int apos = cd->pos_add;
int dpos = cd->pos_display;
if (dpos >= apos)
apos += CONDIS_MAX_HISTORY;
if (dpos + cd->rows >= apos)
return; // Cant scroll any further. Last entry
int scroll = MIN(cd->rows, apos - (dpos + cd->rows));
cd->pos_display = (dpos + scroll) % CONDIS_MAX_HISTORY;
cd->is_redraw_needed = 1;
}
static void
cd_write(int fd, void *buf, size_t len)
{
// Failed write() to stdout is fatal.
if (write(fd, buf, len) != len)
ERREXIT("write()\n");
}
/*
* Draw the console at position and with each string
* up to max_char length. Add '..' if string is longer...
*
* THIS WILL LEAVE THE CURSOR ASTRAY. Use CONSOLE_draw() to correct cursor position.
*/
void
GS_condis_draw(GS_CONDIS *cd, int force)
{
int pos = cd->pos_display;
if (force == 0)
{
if (cd->is_redraw_needed == 0)
return;
}
cd->is_redraw_needed = 0;
char buf[1024];
char *end = buf + sizeof (buf) - 1; // Space for \n
char *ptr = buf;
DEBUGF("Moving cursor to %d:1f\n", cd->y);
SXPRINTF(ptr, end - ptr, "\x1B[%d;1f", cd->y);
cd_write(cd->fd, buf, ptr - buf);
const char *last_color_str = NULL;
struct condis_line *cdl;
int i = 0;
for (i = 0; i < cd->rows; i++)
{
if (cd->rows - (i+1) < cd->entries)
{
cdl = &cd->cdl[pos];
ptr = buf;
if (last_color_str != cdl->color_str)
{
if (cdl->color_str == NULL)
SXPRINTF(ptr, end - ptr, "\x1B[0m");
else
SXPRINTF(ptr, end - ptr, "%s", cdl->color_str);
last_color_str = cdl->color_str;
}
SXPRINTF(ptr, MIN(end - ptr, cd->max_char + 1), "%s", cdl->line);
cd_write(cd->fd, buf, ptr - buf);
}
pos = (pos + 1) % CONDIS_MAX_HISTORY;
cd_write(cd->fd, "\x1B[K", 3); // Clear to end of line
if (i < cd->rows - 1)
cd_write(cd->fd, "\r\n", 2); // Add \n to all but last line
}
// Reset color if last color was not the default color
if (last_color_str != NULL)
cd_write(cd->fd, "\x1B[0m", 4);
}
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