Geografic-Information-System/display/d.mon/start.c

#include <stdlib.h>
#include <string.h>
#include <grass/gis.h>
#include <grass/spawn.h>
#include <grass/glocale.h>

#include "proto.h"

static void start(const char *, const char *);
static void start_wx(const char *, const char *, const char *,
		     const char *, int, int);

/* start file-based monitor */
void start(const char *name, const char *output)
{
    char *env_name;

    if (!output)
	return;
    
    env_name = NULL;
    G_asprintf(&env_name, "MONITOR_%s_MAPFILE", name);
    G_setenv(env_name, output);
}

/* start wxGUI display monitor */
void start_wx(const char *name, const char *tempfile,
	      const char *env_value, const char *cmd_value,
	      int width, int height)
{
    char progname[GPATH_MAX];
    char *env_name, *map_value, str_width[1024], str_height[1024];

    env_name = NULL;
    G_asprintf(&env_name, "MONITOR_%s_MAPFILE", name);
    G_asprintf(&map_value, "%s.ppm", tempfile);
    G_setenv(env_name, map_value);
    /* close(creat(map_value, 0666)); */
    
    G_debug(3, "       mapfile = %s", map_value);

    sprintf(progname, "%s/etc/gui/wxpython/mapdisp/main.py", G_gisbase());
    if (width > 0)
        sprintf(str_width, "%d", width);
    else
        str_width[0] = '\0';
    if (height > 0)
        sprintf(str_height, "%d", height);
    else
        str_height[0] = '\0';

    G_spawn_ex(getenv("GRASS_PYTHON"), progname, progname,
	       name, map_value, cmd_value, env_value,
               str_width, str_height, SF_BACKGROUND, NULL);
}

int start_mon(const char *name, const char *output, int select,
	      int width, int height, const char *bgcolor,
	      int truecolor)
{
    const char *curr_mon;
    char *env_name, *env_value, *cmd_value;
    char *tempfile, buf[1024];
    int env_fd;
    
    curr_mon = G__getenv("MONITOR");
    if (curr_mon && strcmp(curr_mon, name) == 0 && check_mon(curr_mon))
	G_fatal_error(_("Monitor <%s> already running"), name);
    
    tempfile = G_tempfile();

    env_name = env_value = NULL;
    G_asprintf(&env_name, "MONITOR_%s_ENVFILE", name);
    G_asprintf(&env_value, "%s.env", tempfile);
    G_setenv(env_name, env_value);
    env_fd = creat(env_value, 0666);
    if (env_fd < 0)
	G_fatal_error(_("Unable to create file '%s'"), env_value);

    sprintf(buf, "GRASS_PNG_READ=TRUE\n");
    write(env_fd, buf, strlen(buf));
    if (width) {
	sprintf(buf, "GRASS_WIDTH=%d\n", width);
	write(env_fd, buf, strlen(buf));
    }
    if (height) {
	sprintf(buf, "GRASS_HEIGHT=%d\n", height);
	write(env_fd, buf, strlen(buf));
    }
    if (bgcolor) {
	if (strcmp(bgcolor, "none") == 0)
	    sprintf(buf, "GRASS_TRANSPARENT=TRUE\n");
	else
	    sprintf(buf, "GRASS_BACKGROUNDCOLOR=%s\n", bgcolor);
	write(env_fd, buf, strlen(buf));
    }
    if (truecolor) {
	sprintf(buf, "GRASS_TRUECOLOR=TRUE\n");
	write(env_fd, buf, strlen(buf));
    }
    close(env_fd);

    cmd_value = NULL;
    G_asprintf(&env_name, "MONITOR_%s_CMDFILE", name);
    G_asprintf(&cmd_value, "%s.cmd", tempfile);
    G_setenv(env_name, cmd_value);
    close(creat(cmd_value, 0666));

    G_verbose_message(_("Staring monitor <%s> with env file '%s'"), name, env_value);
    if (G_verbose() > G_verbose_std()) {
        FILE *fd;
        
        fd = fopen(env_value, "r");
        while (G_getl2(buf, sizeof(buf) - 1, fd) != 0) {
            fprintf(stderr, " %s\n", buf);
        }
        fclose(fd);
    }

    G_debug(1, "start: name=%s ", name);
    G_debug(3, "       envfile = %s", env_value);
    G_debug(3, "       cmdfile = %s", cmd_value);
    
    if (select)
	G_setenv("MONITOR", name);
    
    if (strncmp(name, "wx", 2) == 0) /* use G_strncasecmp() instead */
	start_wx(name, tempfile, env_value, cmd_value, 
		 width, height);
    else
	start(name, output);
    
    return 0;
}