3 * selector is a simple shell command for selection of strings with a
4 * dynamic pattern-matching.
6 * Copyright (c) 2009 Francois Fleuret
7 * Written by Francois Fleuret <francois@fleuret.org>
9 * This file is part of selector.
11 * selector is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 3 as
13 * published by the Free Software Foundation.
15 * selector is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with selector. If not, see <http://www.gnu.org/licenses/>.
25 // To use it as a super-history-search for bash:
27 // alias h='./selector -i -b -v -f <(history)'
29 // This software is highly Linux-specific, but I would be glad to get
30 // patches to make it work on other OS
40 #include <sys/ioctl.h>
47 const int buffer_size = 1024;
49 // Yeah, global variables!
51 int nb_lines_max = 1000;
52 char pattern_separator = ';';
53 int output_to_vt_buffer = 0;
55 int zsh_history = 0, bash_history = 0;
56 int inverse_order = 0;
57 int remove_duplicates = 0;
59 //////////////////////////////////////////////////////////////////////
61 // int test_and_set_hash(char *s, char **hashed, int hash_size) {
62 // uint32_t code = 0, mask;
65 // for(int k = 0; s[k]; k++) {
66 // code += ((uint32_t) (s[k])) << (8 * k%4);
69 // code = code%hash_table_size;
77 //////////////////////////////////////////////////////////////////////
79 // This looks severely Linux-only ...
81 void inject_into_tty_buffer(char *line) {
82 char *tty = ttyname(STDIN_FILENO);
83 int fd = open(tty, O_RDWR);
85 struct termios oldtio, newtio;
88 // Save current port settings
89 tcgetattr(fd,&oldtio);
90 memset(&newtio, 0, sizeof(newtio));
91 // Set input mode (non-canonical, *no echo*,...)
92 tcflush(fd, TCIFLUSH);
93 tcsetattr(fd,TCSANOW, &newtio);
94 // Put the selected line in the tty input buffer
95 for(char *k = line; *k; k++) {
96 ioctl(fd, TIOCSTI, k);
98 // Restore the old settings
99 tcsetattr(fd,TCSANOW, &oldtio);
102 cerr << "Can not open " << tty << "." << endl;
107 //////////////////////////////////////////////////////////////////////
109 int match(char *string, int nb_patterns, char **patterns) {
110 for(int n = 0; n < nb_patterns; n++) {
111 if(strstr(string, patterns[n]) == 0) return 0;
116 //////////////////////////////////////////////////////////////////////
118 void check_opt(int argc, char **argv, int n_opt, int n, const char *help) {
119 if(n_opt + n >= argc) {
120 cerr << "Missing argument for " << argv[n_opt] << "."
122 << "Expecting " << help << "."
128 //////////////////////////////////////////////////////////////////////
130 int previous_visible(int current_line, int nb_lines, char **lines, int nb_patterns, char **patterns) {
131 int line = current_line - 1;
132 while(line >= 0 && !match(lines[line], nb_patterns, patterns)) line--;
136 int next_visible(int current_line, int nb_lines, char **lines, int nb_patterns, char **patterns) {
137 int line = current_line + 1;
138 while(line < nb_lines && !match(lines[line], nb_patterns, patterns)) line++;
146 void update_screen(int *current_line, int *temporary_line, int motion,
147 int nb_lines, char **lines,
148 char *pattern_list) {
150 char buffer[buffer_size];
152 // We split the pattern list into individual patterns
156 for(char *s = pattern_list; *s; s++) {
157 if(*s == pattern_separator) {
162 char splitted_patterns[strlen(pattern_list) + 1];
163 char *patterns[nb_patterns];
165 strcpy(splitted_patterns, pattern_list);
168 char *last_pattern_start = splitted_patterns;
169 for(char *s = splitted_patterns; n < nb_patterns; s++) {
170 if(*s == pattern_separator || *s == '\0') {
172 patterns[n++] = last_pattern_start;
173 last_pattern_start = s + 1;
177 // We now take care of printing the lines per se
179 int console_width = getmaxx(stdscr);
180 int console_height = getmaxy(stdscr);
182 // First, we find a visible line. In priority: The current, or the
183 // first visible after it, or the first visible before it.
186 if(match(lines[*current_line], nb_patterns, patterns)) {
187 new_line = *current_line;
189 new_line = next_visible(*current_line, nb_lines, lines, nb_patterns, patterns);
191 new_line = previous_visible(*current_line, nb_lines, lines, nb_patterns, patterns);
195 // If we found a visible line and we should move, let's move
197 if(new_line >= 0 && motion != 0) {
200 // We want to go down, let's find the first visible line below
201 for(int m = 0; l >= 0 && m < motion; m++) {
202 l = next_visible(l, nb_lines, lines, nb_patterns, patterns);
208 // We want to go up, let's find the first visible line above
209 for(int m = 0; l >= 0 && m < -motion; m++) {
210 l = previous_visible(l, nb_lines, lines, nb_patterns, patterns);
220 use_default_colors();
224 int nb_printed_lines = 1;
226 // Here new_line is either a line number matching the patterns, or -1
230 int first_line = new_line, last_line = new_line, nb_match = 1;
232 // We find the first and last line to show, so that the total of
233 // visible lines between them (them include) is console_height - 1
235 while(nb_match < console_height-1 && (first_line > 0 || last_line < nb_lines - 1)) {
239 while(first_line > 0 && !match(lines[first_line], nb_patterns, patterns)) {
242 if(match(lines[first_line], nb_patterns, patterns)) {
247 if(last_line < nb_lines - 1) {
249 while(last_line < nb_lines - 1 && !match(lines[last_line], nb_patterns, patterns)) {
253 if(match(lines[last_line], nb_patterns, patterns)) {
259 // Now we display them
261 for(int l = first_line; l <= last_line; l++) {
262 if(match(lines[l], nb_patterns, patterns)) {
265 while(lines[l][k] && k < buffer_size - 2 && k < console_width - 2) {
266 buffer[k] = lines[l][k];
270 // We fill the rest of the line with blanks if either we did
271 // not clear() or if this is the highlighted line
274 while(k < console_width) {
282 // Highlight the highlighted line ...
286 attron(COLOR_PAIR(2));
287 addnstr(buffer, console_width);
288 attroff(COLOR_PAIR(2));
291 addnstr(buffer, console_width);
295 addnstr(buffer, console_width);
303 *current_line = new_line;
307 *temporary_line = new_line;
309 if(nb_printed_lines == 1) {
310 addnstr("[no selection]\n", console_width);
316 sprintf(buffer, "%d/%d pattern: %s",
317 nb_printed_lines - 1,
321 for(int k = strlen(buffer); k < console_width; k++) buffer[k] = ' ';
322 buffer[console_width] = '\0';
326 attron(COLOR_PAIR(1));
327 addnstr(buffer, console_width);
328 attroff(COLOR_PAIR(1));
331 addnstr(buffer, console_width);
340 //////////////////////////////////////////////////////////////////////
342 int main(int argc, char **argv) {
343 char buffer[buffer_size];
344 int color_fg_modeline, color_bg_modeline;
345 int color_fg_highlight, color_bg_highlight;
347 color_fg_modeline = COLOR_WHITE;
348 color_bg_modeline = COLOR_BLACK;
349 color_fg_highlight = COLOR_BLACK;
350 color_bg_highlight = COLOR_YELLOW;
352 setlocale(LC_ALL, "");
354 char input_filename[buffer_size], output_filename[buffer_size];
356 strcpy(input_filename, "");
357 strcpy(output_filename, "");
362 if(strcmp(argv[i], "-o") == 0) {
363 check_opt(argc, argv, i, 1, "<output filename>");
364 strncpy(output_filename, argv[i+1], buffer_size);
368 else if(strcmp(argv[i], "-s") == 0) {
369 check_opt(argc, argv, i, 1, "<pattern separator>");
370 pattern_separator = argv[i+1][0];
374 else if(strcmp(argv[i], "-v") == 0) {
375 output_to_vt_buffer = 1;
379 else if(strcmp(argv[i], "-m") == 0) {
384 else if(strcmp(argv[i], "-f") == 0) {
385 check_opt(argc, argv, i, 1, "<input filename>");
386 strncpy(input_filename, argv[i+1], buffer_size);
390 else if(strcmp(argv[i], "-i") == 0) {
395 else if(strcmp(argv[i], "-z") == 0) {
400 else if(strcmp(argv[i], "-b") == 0) {
405 else if(strcmp(argv[i], "-r") == 0) {
406 remove_duplicates = 1;
410 else if(strcmp(argv[i], "-l") == 0) {
411 check_opt(argc, argv, i, 1, "<maximum number of lines>");
412 nb_lines_max = atoi(argv[i+1]);
416 else if(strcmp(argv[i], "-c") == 0) {
417 check_opt(argc, argv, i, 4, "<fg modeline> <bg modeline> <fg highlight> <bg highlight>");
418 color_fg_modeline = atoi(argv[i+1]);
419 color_bg_modeline = atoi(argv[i+2]);
420 color_fg_highlight = atoi(argv[i+3]);
421 color_bg_highlight = atoi(argv[i+4]);
426 cerr << "Selector version " << VERSION
428 << "Written by Francois Fleuret <francois@fleuret.org>"
437 << " [-c <fg modeline> <bg modeline> <fg highlight> <bg highlight>]"
438 << " [-o <output filename>]"
439 << " [-s <pattern separator>]"
440 << " [-l <max number of lines>]"
441 << " -f <input filename>"
443 if(strcmp(argv[i], "-h") == 0) {
451 char **lines = new char *[nb_lines_max];
453 if(!input_filename[0]) {
454 cerr << "You must specify a input file with -f." << endl;
460 ifstream file(input_filename);
463 cerr << "Can not open " << input_filename << endl;
467 while(nb_lines < nb_lines_max && !file.eof()) {
468 file.getline(buffer, buffer_size);
469 if(strcmp(buffer, "") != 0) {
471 if(zsh_history && *s == ':') {
472 while(*s && *s != ';') s++;
476 if(bash_history && (*s == ' ' || (*s >= '0' && *s <= '9'))) {
477 while(*s == ' ' || (*s >= '0' && *s <= '9')) s++;
480 if(!remove_duplicates || nb_lines == 0 || strcmp(lines[nb_lines - 1], s)) {
481 lines[nb_lines] = new char[strlen(s) + 1];
482 strcpy(lines[nb_lines], s);
489 for(int i = 0; i < nb_lines/2; i++) {
490 char *s = lines[nb_lines - 1 - i];
491 lines[nb_lines - 1 - i] = lines[i];
496 char patterns[buffer_size];
506 if(color_fg_modeline < 0 || color_fg_modeline >= COLORS ||
507 color_bg_modeline < 0 || color_bg_modeline >= COLORS ||
508 color_fg_highlight < 0 || color_bg_highlight >= COLORS ||
509 color_bg_highlight < 0 || color_bg_highlight >= COLORS) {
513 cerr << "Color numbers have to be between 0 and " << COLORS - 1 << "." << endl;
516 init_pair(1, color_fg_modeline, color_bg_modeline);
517 init_pair(2, color_fg_highlight, color_bg_highlight);
524 curs_set(0); // Hide the cursor
525 keypad(stdscr, TRUE); // So that the arrow keys work
528 int current_line = 0, temporary_line = 0;
530 update_screen(¤t_line, &temporary_line, 0, nb_lines, lines, patterns);
538 if(key >= ' ' && key <= '~') {
539 patterns[patterns_point++] = key;
540 patterns[patterns_point] = '\0';
543 else if(key == KEY_BACKSPACE || key == '
\b' ||
544 key == KEY_DC || key == '
\ 4') {
545 if(patterns_point > 0) {
547 patterns[patterns_point] = '\0';
551 else if(key == KEY_HOME) {
555 else if(key == KEY_END) {
556 current_line = nb_lines - 1;
559 else if(key == KEY_NPAGE) {
563 else if(key == KEY_PPAGE) {
567 else if(key == KEY_UP || key == '
\10') {
571 else if(key == KEY_DOWN || key == '
\ e') {
575 update_screen(¤t_line, &temporary_line, motion,
576 nb_lines, lines, patterns);
578 } while(key != '\n' && key != KEY_ENTER && key != '
\a');
584 if((key == KEY_ENTER || key == '\n')) {
586 if(output_to_vt_buffer) {
587 if(temporary_line >= 0 && temporary_line < nb_lines) {
588 inject_into_tty_buffer(lines[temporary_line]);
592 if(output_filename[0]) {
593 ofstream out(output_filename);
595 cerr << "Can not open " << output_filename << " for writing." << endl;
598 if(temporary_line >= 0 && temporary_line < nb_lines) {
599 out << lines[temporary_line] << endl;
609 for(int l = 0; l < nb_lines; l++) {