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#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "fzy.h"
#include "tty.h"
#define INITIAL_CAPACITY 1
int choices_capacity = 0;
int choices_n = 0;
const char **choices = NULL;
double *choices_score = NULL;
size_t *choices_sorted = NULL;
size_t current_selection = 0;
void resize_choices(int new_capacity){
choices = realloc(choices, new_capacity * sizeof(const char *));
choices_score = realloc(choices_score, new_capacity * sizeof(double));
choices_sorted = realloc(choices_sorted, new_capacity * sizeof(size_t));
int i = choices_capacity;
for(; i < new_capacity; i++){
choices[i] = NULL;
}
choices_capacity = new_capacity;
}
void add_choice(const char *choice){
if(choices_n == choices_capacity){
resize_choices(choices_capacity * 2);
}
choices[choices_n++] = choice;
}
void read_choices(){
char *line = NULL;
size_t len = 0;
ssize_t read;
while ((read = getline(&line, &len, stdin)) != -1) {
char *nl;
if((nl = strchr(line, '\n')))
*nl = '\0';
add_choice(line);
line = NULL;
}
free(line);
}
size_t choices_available = 0;
static int cmpchoice(const void *p1, const void *p2) {
size_t idx1 = *(size_t *)p1;
size_t idx2 = *(size_t *)p2;
double score1 = choices_score[idx1];
double score2 = choices_score[idx2];
if(score1 == score2)
return 0;
else if(score1 < score2)
return 1;
else
return -1;
}
void run_search(char *needle){
current_selection = 0;
choices_available = 0;
int i;
for(i = 0; i < choices_n; i++){
if(has_match(needle, choices[i])){
choices_score[i] = match(needle, choices[i]);
choices_sorted[choices_available++] = i;
}
}
qsort(choices_sorted, choices_available, sizeof(size_t), cmpchoice);
}
#define NUMLINES 10
#define SEARCH_SIZE_MAX 4096
int search_size;
char search[SEARCH_SIZE_MAX + 1] = {0};
void clear(tty_t *tty){
fprintf(tty->fout, "%c%c0G", 0x1b, '[');
int line = 0;
while(line++ < NUMLINES + 1){
fprintf(tty->fout, "%c%cK\n", 0x1b, '[');
}
fprintf(tty->fout, "%c%c%iA", 0x1b, '[', line-1);
fprintf(tty->fout, "%c%c0G", 0x1b, '[');
}
#define TTY_COLOR_HIGHLIGHT TTY_COLOR_YELLOW
void draw_match(tty_t *tty, const char *choice, int selected){
int n = strlen(search);
size_t positions[n + 1];
for(int i = 0; i < n + 1; i++)
positions[i] = -1;
match_positions(search, choice, &positions[0]);
if(selected)
tty_setinvert(tty);
for(size_t i = 0, p = 0; choice[i] != '\0'; i++){
if(positions[p] == i){
tty_setfg(tty, TTY_COLOR_HIGHLIGHT);
p++;
}else{
tty_setfg(tty, TTY_COLOR_NORMAL);
}
fprintf(tty->fout, "%c", choice[i]);
}
fprintf(tty->fout, "\n");
tty_setnormal(tty);
}
void draw(tty_t *tty){
int start = 0;
if(current_selection >= NUMLINES){
start = current_selection - NUMLINES + 1;
}
int line = 0;
const char *prompt = "> ";
clear(tty);
fprintf(tty->fout, "%s%s\n", prompt, search);
for(size_t i = start; line < NUMLINES && i < choices_available; i++){
draw_match(tty, choices[choices_sorted[i]], i == current_selection);
line++;
}
fprintf(tty->fout, "%c%c%iA", 0x1b, '[', line + 1);
fprintf(tty->fout, "%c%c%ziG", 0x1b, '[', strlen(prompt) + strlen(search) + 1);
fflush(tty->fout);
}
void emit(tty_t *tty){
/* ttyout should be flushed before outputting on stdout */
fclose(tty->fout);
if(choices_available){
/* output the selected result */
printf("%s\n", choices[choices_sorted[current_selection]]);
}else{
/* No match, output the query instead */
printf("%s\n", search);
}
exit(EXIT_SUCCESS);
}
void action_prev(){
current_selection = (current_selection + choices_available - 1) % choices_available;
}
void action_next(){
current_selection = (current_selection + 1) % choices_available;
}
void run(tty_t *tty){
run_search(search);
char ch;
do {
draw(tty);
ch = tty_getchar(tty);
if(isprint(ch)){
if(search_size < SEARCH_SIZE_MAX){
search[search_size++] = ch;
search[search_size] = '\0';
run_search(search);
}
}else if(ch == 127 || ch == 8){ /* DEL || backspace */
if(search_size)
search[--search_size] = '\0';
run_search(search);
}else if(ch == 21){ /* C-U */
search_size = 0;
search[0] = '\0';
run_search(search);
}else if(ch == 23){ /* C-W */
if(search_size)
search[--search_size] = '\0';
while(search_size && !isspace(search[--search_size]))
search[search_size] = '\0';
run_search(search);
}else if(ch == 14){ /* C-N */
action_next();
}else if(ch == 16){ /* C-P */
action_prev();
}else if(ch == 10){ /* Enter */
clear(tty);
emit(tty);
}
}while(1);
}
void usage(const char *argv0){
fprintf(stderr, "USAGE: %s\n", argv0);
exit(EXIT_FAILURE);
}
int main(int argc, char *argv[]){
if(argc == 2 && !strcmp(argv[1], "-v")){
printf("%s " VERSION " (c) 2014 John Hawthorn\n", argv[0]);
exit(EXIT_SUCCESS);
}else if(argc != 1){
usage(argv[0]);
}
tty_t tty;
tty_init(&tty);
resize_choices(INITIAL_CAPACITY);
read_choices();
clear(&tty);
run(&tty);
return 0;
}
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