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#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "match.h"
#include "tty_interface.h"
#include "../config.h"
static void clear(tty_interface_t *state) {
tty_t *tty = state->tty;
tty_setcol(tty, 0);
size_t line = 0;
while (line++ < state->options->num_lines) {
tty_newline(tty);
}
tty_clearline(tty);
tty_moveup(tty, line - 1);
tty_flush(tty);
}
static void draw_match(tty_interface_t *state, const char *choice, int selected) {
tty_t *tty = state->tty;
options_t *options = state->options;
char *search = state->search;
int n = strlen(search);
size_t positions[n + 1];
for (int i = 0; i < n + 1; i++)
positions[i] = -1;
double score = match_positions(search, choice, &positions[0]);
size_t maxwidth = tty_getwidth(tty);
if (options->show_scores)
tty_printf(tty, "(%5.2f) ", score);
if (selected)
tty_setinvert(tty);
for (size_t i = 0, p = 0; choice[i] != '\0'; i++) {
if (i + 1 < maxwidth) {
if (positions[p] == i) {
tty_setfg(tty, TTY_COLOR_HIGHLIGHT);
p++;
} else {
tty_setfg(tty, TTY_COLOR_NORMAL);
}
tty_printf(tty, "%c", choice[i]);
} else {
tty_printf(tty, "$");
break;
}
}
tty_setnormal(tty);
}
static void draw(tty_interface_t *state) {
tty_t *tty = state->tty;
choices_t *choices = state->choices;
options_t *options = state->options;
unsigned int num_lines = options->num_lines;
size_t start = 0;
size_t current_selection = choices->selection;
if (current_selection + options->scrolloff >= num_lines) {
start = current_selection + options->scrolloff - num_lines + 1;
if (start + num_lines >= choices_available(choices)) {
start = choices_available(choices) - num_lines;
}
}
tty_setcol(tty, 0);
tty_printf(tty, "%s%s", options->prompt, state->search);
tty_clearline(tty);
for (size_t i = start; i < start + num_lines; i++) {
tty_printf(tty, "\n");
tty_clearline(tty);
const char *choice = choices_get(choices, i);
if (choice) {
draw_match(state, choice, i == choices->selection);
}
}
tty_moveup(tty, num_lines);
tty_setcol(tty, strlen(options->prompt) + strlen(state->search));
tty_flush(tty);
}
static void action_emit(tty_interface_t *state) {
/* Reset the tty as close as possible to the previous state */
clear(state);
/* ttyout should be flushed before outputting on stdout */
tty_close(state->tty);
const char *selection = choices_get(state->choices, state->choices->selection);
if (selection) {
/* output the selected result */
printf("%s\n", selection);
} else {
/* No match, output the query instead */
printf("%s\n", state->search);
}
state->exit = EXIT_SUCCESS;
}
#define KEY_CTRL(key) ((key) - ('@'))
#define KEY_DEL 127
#define KEY_ESC 27
static void update_search(tty_interface_t *state) {
choices_search(state->choices, state->search);
strcpy(state->last_search, state->search);
}
void update_state(tty_interface_t *state) {
if (strcmp(state->last_search, state->search))
update_search(state);
}
void tty_interface_init(tty_interface_t *state, tty_t *tty, choices_t *choices, options_t *options) {
state->tty = tty;
state->choices = choices;
state->options = options;
strcpy(state->search, "");
strcpy(state->last_search, "");
state->exit = -1;
if (options->init_search)
strncpy(state->search, options->init_search, SEARCH_SIZE_MAX);
update_search(state);
}
int tty_interface_run(tty_interface_t *state) {
tty_t *tty = state->tty;
choices_t *choices = state->choices;
char *search = state->search;
char ch;
while (state->exit < 0) {
draw(state);
ch = tty_getchar(tty);
size_t search_size = strlen(search);
if (isprint(ch)) {
if (search_size < SEARCH_SIZE_MAX) {
search[search_size++] = ch;
search[search_size] = '\0';
}
} else if (ch == KEY_DEL || ch == KEY_CTRL('H')) { /* DEL || Backspace (C-H) */
if (search_size)
search[--search_size] = '\0';
} else if (ch == KEY_CTRL('U')) { /* C-U */
search_size = 0;
search[0] = '\0';
} else if (ch == KEY_CTRL('W')) { /* C-W */
if (search_size)
search[--search_size] = '\0';
while (search_size && !isspace(search[--search_size]))
search[search_size] = '\0';
} else if (ch == KEY_CTRL('N')) { /* C-N */
choices_next(choices);
} else if (ch == KEY_CTRL('P')) { /* C-P */
choices_prev(choices);
} else if (ch == KEY_CTRL('I')) { /* TAB (C-I) */
strncpy(search, choices_get(choices, choices->selection), SEARCH_SIZE_MAX);
} else if (ch == KEY_CTRL('C') || ch == KEY_CTRL('D')) { /* ^C || ^D */
clear(state);
tty_close(tty);
state->exit = EXIT_FAILURE;
} else if (ch == KEY_CTRL('M')) { /* CR */
action_emit(state);
} else if (ch == KEY_ESC) { /* ESC */
ch = tty_getchar(tty);
if (ch == '[' || ch == 'O') {
ch = tty_getchar(tty);
if (ch == 'A') { /* UP ARROW */
choices_prev(choices);
} else if (ch == 'B') { /* DOWN ARROW */
choices_next(choices);
}
}
}
update_state(state);
}
return state->exit;
}
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