// Set the user's terminal to a given attribute and colors.
static void display_attr_color(Attr attr, Color fg_color, Color bg_color) {
printf("\33[m");
if (fg_color != NULL_COLOR)
printf("\33[%dm", fg_color);
if (bg_color != NULL_COLOR)
printf("\33[%dm", bg_color);
if (attr & ATTR_UNDERLINE)
printf("%s", terminfo.enter_underline);
if (attr & ATTR_BOLD)
printf("%s", terminfo.enter_bold);
if (attr & ATTR_BLINK)
printf("%s", terminfo.enter_blink);
if (attr & ATTR_STANDOUT)
printf("%s", terminfo.enter_standout);
}
static int get_hex(unsigned char const** pp) {
int v1 = hexval(*(*pp)++);
int v2 = hexval(*(*pp)++);
return (v1 << 4) | v2;
}
// Display a given screen image on the user's terminal.
void display_screen(const byte* img, int imglen, int screen_width, int screen_height) {
int x = 0;
int y = 0;
int cursor_x = 0;
int cursor_y = 0;
int literal = 0;
Attr curr_attr = 0;
Color curr_fg_color = NULL_COLOR;
Color curr_bg_color = NULL_COLOR;
while (imglen-- > 0) {
wchar ch = load_wchar(&img);
if (!literal) {
switch (ch) {
case '\\':
literal = 1;
continue;
case LTS_CHAR_ATTR:
curr_attr = get_hex(&img);
display_attr_color(curr_attr, curr_fg_color, curr_bg_color);
continue;
case LTS_CHAR_FG_COLOR:
curr_fg_color = get_hex(&img);
display_attr_color(curr_attr, curr_fg_color, curr_bg_color);
continue;
case LTS_CHAR_BG_COLOR:
curr_bg_color = get_hex(&img);
display_attr_color(curr_attr, curr_fg_color, curr_bg_color);
continue;
case LTS_CHAR_CURSOR:
cursor_x = x;
cursor_y = y;
continue;
}
}
literal = 0;
if (ch != 0) {
byte cbuf[UNICODE_MAX_BYTES];
byte* cp = cbuf;
store_wchar(&cp, ch);
fwrite(cbuf, 1, cp-cbuf, stdout);
}
if (++x >= screen_width) {
printf("\n");
x = 0;
if (++y >= screen_height)
break;
}
}
printf("%s", tgoto(terminfo.cursor_move, cursor_x, cursor_y));
fflush(stdout);
}
// Print a given screen image on stderr.
// Unlike display_screen which prints escape sequences to change color etc,
// display_screen_debug only prints printable ASCII.
void display_screen_debug(const byte* img, int imglen, int screen_width, int screen_height) {
int x = 0;
int y = 0;
int literal = 0;
while (imglen-- > 0) {
wchar ch = load_wchar(&img);
if (!literal) {
switch (ch) {
case '\\':
literal = 1;
continue;
case LTS_CHAR_ATTR:
case LTS_CHAR_FG_COLOR:
case LTS_CHAR_BG_COLOR:
x -= 3; // don't count LTS_CHAR or following 2 bytes
break;
case LTS_CHAR_CURSOR:
x -= 1; // don't count LTS_CHAR
break;
}
}
literal = 0;
if (is_ascii(ch))
fwrite(&ch, 1, 1, stderr);
else
fprintf(stderr, "<%lx>", (unsigned long) ch);
if (++x >= screen_width) {
fprintf(stderr, "\n");
x = 0;
if (++y >= screen_height)
break;
}
}
fflush(stderr);
}
// Print a list of strings.
void print_strings(const char* title, char* const* strings) {
if (1) return; ///
fprintf(stderr, "%s:\n", title);
char* const* s;
for (s = strings; *s != NULL; ++s) {
fprintf(stderr, " ");
const char* p;
for (p = *s; *p != '\0'; ++p) {
if (is_ascii(*p))
fprintf(stderr, "%c", (char) *p);
else
fprintf(stderr, "\\x%04x", *p);
}
fprintf(stderr, "\n");
}
fprintf(stderr, "%s- end\n", title);
}
