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#include <stdio.h>
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#include <libtsm.h>
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#include <string.h>
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#define READ_BUF_SIZE 16 * 1024
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static int RGB_LEVELS[6] = { 0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff };
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struct tsm_screen_attr last_attr;
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struct tsm_screen_attr *last_attr_ptr = &last_attr;
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static int u8_wc_to_utf8(char *dest, uint32_t ch) {
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if (ch < 0x80) {
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dest[0] = (char)ch;
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return 1;
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}
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if (ch < 0x800) {
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dest[0] = (ch >> 6) | 0xC0;
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dest[1] = (ch & 0x3F) | 0x80;
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return 2;
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}
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if (ch < 0x10000) {
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dest[0] = (ch >> 12) | 0xE0;
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dest[1] = ((ch >> 6) & 0x3F) | 0x80;
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dest[2] = (ch & 0x3F) | 0x80;
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return 3;
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}
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if (ch < 0x110000) {
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dest[0] = (ch >> 18) | 0xF0;
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dest[1] = ((ch >> 12) & 0x3F) | 0x80;
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dest[2] = ((ch >> 6) & 0x3F) | 0x80;
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dest[3] = (ch & 0x3F) | 0x80;
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return 4;
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}
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return 0;
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}
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void check_err(int err, const char *message) {
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if (err) {
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printf("%s\n", message);
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exit(1);
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}
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}
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void write_cb(struct tsm_vte *vte, const char *u8, size_t len, void *data) {}
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int prepare_cb(struct tsm_screen *con, void *data) {
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int *line = (int *)data;
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*line = -1;
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printf("[");
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return 0;
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}
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void print_char(const uint32_t *ch) {
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char str[5];
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int size;
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if (*ch == 0) {
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printf(" ");
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} else if (*ch == '"') {
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printf("\\\"");
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} else if (*ch == '\\') {
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printf("\\\\");
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} else {
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size = u8_wc_to_utf8(str, *ch);
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if (size > 0) {
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str[size] = 0;
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printf("%s", str);
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} else {
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printf("?");
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}
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}
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}
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int get_rgb_index(int value) {
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int i;
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for (i=0; i<6; i++) {
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if (RGB_LEVELS[i] == value) return i;
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}
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return -1;
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}
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int get_rgb_color(int r, int g, int b) {
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if (r == g && g == b && (r - 8) % 10 == 0) {
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return 232 + (r - 8) / 10;
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} else {
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return 16 + get_rgb_index(r) * 36 + get_rgb_index(g) * 6 + get_rgb_index(b);
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}
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}
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int get_fg(const struct tsm_screen_attr *attr) {
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if (attr->fccode == -1) {
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return get_rgb_color(attr->fr, attr->fg, attr->fb);
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} else if (attr->fccode >= 0 && attr->fccode < 16) {
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return attr->fccode;
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} else {
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return -1;
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}
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}
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int get_bg(const struct tsm_screen_attr *attr) {
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if (attr->bccode == -1) {
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return get_rgb_color(attr->br, attr->bg, attr->bb);
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} else if (attr->bccode >= 0 && attr->bccode < 16) {
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return attr->bccode;
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} else {
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return -1;
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}
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}
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void print_attr(const struct tsm_screen_attr *attr) {
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bool comma_needed = false;
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int color_code;
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printf("{");
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color_code = get_fg(attr);
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if (color_code != -1) {
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printf("\"fg\":%d", color_code);
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comma_needed = true;
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}
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color_code = get_bg(attr);
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if (color_code != -1) {
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if (comma_needed) printf(",");
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printf("\"bg\":%d", color_code);
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comma_needed = true;
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}
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if (attr->bold) {
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if (comma_needed) printf(",");
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printf("\"bold\":true");
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comma_needed = true;
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}
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if (attr->underline) {
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if (comma_needed) printf(",");
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printf("\"underline\":true");
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comma_needed = true;
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}
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if (attr->inverse) {
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if (comma_needed) printf(",");
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printf("\"inverse\":true");
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comma_needed = true;
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}
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if (attr->blink) {
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if (comma_needed) printf(",");
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printf("\"blink\":true");
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comma_needed = true;
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}
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printf("}");
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}
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bool attr_eq(struct tsm_screen_attr *attr1, const struct tsm_screen_attr *attr2) {
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return attr1->fccode == attr2->fccode &&
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attr1->bccode == attr2->bccode &&
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attr1->fr == attr2->fr &&
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attr1->fg == attr2->fg &&
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attr1->fb == attr2->fb &&
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attr1->br == attr2->br &&
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attr1->bg == attr2->bg &&
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attr1->bb == attr2->bb &&
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attr1->bold == attr2->bold &&
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attr1->underline == attr2->underline &&
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attr1->inverse == attr2->inverse &&
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attr1->blink == attr2->blink;
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}
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void attr_cp(const struct tsm_screen_attr *src, struct tsm_screen_attr *dst) {
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memcpy((void *)dst, (const void *)src, sizeof(last_attr));
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}
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void close_cell() {
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printf("\",");
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print_attr(last_attr_ptr);
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printf("]");
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}
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void open_cell(const struct tsm_screen_attr *attr) {
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printf("[\"");
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attr_cp(attr, last_attr_ptr);
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}
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int draw_cb(struct tsm_screen *con, uint32_t id, const uint32_t *ch, size_t len,
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unsigned int width, unsigned int posx, unsigned int posy,
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const struct tsm_screen_attr *attr, tsm_age_t age, void *data) {
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int *line = (int *)data;
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if (((signed int)posy) > *line) {
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if (*line >= 0) {
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close_cell();
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printf("],"); // close line
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}
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printf("["); // open line
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open_cell(attr);
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}
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*line = posy;
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if (width == 0) return 0;
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if (!(attr_eq(last_attr_ptr, attr))) {
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close_cell();
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printf(",");
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open_cell(attr);
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}
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print_char(ch);
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return 0;
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}
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int render_cb(struct tsm_screen *con, void *data) {
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int *line = (int *)data;
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if (*line >= 0) {
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close_cell();
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printf("]"); // close line
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}
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printf("]\n");
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return 0;
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}
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int main(int argc, char *argv[]) {
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int err;
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int i;
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struct tsm_screen *screen;
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struct tsm_vte *vte;
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int width, height;
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char *line = NULL;
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size_t size;
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unsigned int n;
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char *buffer = (char *) malloc(READ_BUF_SIZE);
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int line_n, cursor_x, cursor_y;
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char *cursor_visible;
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unsigned int flags;
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int m, read;
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width = atoi(argv[1]);
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height = atoi(argv[2]);
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err = tsm_screen_new(&screen, NULL, NULL);
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check_err(err, "can't create screen");
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err = tsm_screen_resize(screen, width, height);
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check_err(err, "can't resize screen");
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err = tsm_vte_new(&vte, screen, write_cb, NULL, NULL, NULL);
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check_err(err, "can't create vte");
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for (;;) {
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if (getline(&line, &size, stdin) == -1) break;
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char action = line[0];
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switch(action) {
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case 'd':
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if (getline(&line, &size, stdin) == -1) break;
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n = atoi(line);
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while (n > 0) {
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if (n > READ_BUF_SIZE) {
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m = READ_BUF_SIZE;
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} else {
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m = n;
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}
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read = fread(buffer, 1, m, stdin);
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tsm_vte_input(vte, buffer, read);
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n = n - read;
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}
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break;
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case 'p':
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//tsm_screen_draw(screen, prepare_cb, draw_cb, render_cb, &line_n);
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prepare_cb(screen, &line_n);
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tsm_screen_draw(screen, draw_cb, &line_n);
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render_cb(screen, &line_n);
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break;
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case 'c':
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cursor_x = tsm_screen_get_cursor_x(screen);
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cursor_y = tsm_screen_get_cursor_y(screen);
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flags = tsm_screen_get_flags(screen);
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if (!(flags & TSM_SCREEN_HIDE_CURSOR)) {
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cursor_visible = "true";
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} else {
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cursor_visible = "false";
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}
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printf("{\"x\":%d,\"y\":%d,\"visible\":%s}\n", cursor_x, cursor_y, cursor_visible);
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break;
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}
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fflush(stdout);
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}
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return 0;
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}
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Marcin Kulik
7 years ago