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:
26 // ./selector -v -f ${HISTFILE}
28 // This software is highly Linux-specific, but I would be glad to get
29 // patches to make it work on other OS
39 #include <sys/ioctl.h>
46 // Yeah, global variables!
48 int buffer_size = 1024;
49 int nb_lines_max = 10000;
50 char pattern_separator = ';';
51 int output_to_vt_buffer = 0;
54 int inverse_order = 0;
56 //////////////////////////////////////////////////////////////////////
58 // This looks severely Linux-only ...
60 void inject_into_tty_buffer(char *line) {
61 char *tty = ttyname(STDIN_FILENO);
62 int fd = open(tty, O_WRONLY);
64 struct termios oldtio, newtio;
67 // Save current port settings
68 tcgetattr(fd,&oldtio);
69 memset(&newtio, 0, sizeof(newtio));
70 // Set input mode (non-canonical, *no echo*,...)
71 tcflush(fd, TCIFLUSH);
72 tcsetattr(fd,TCSANOW, &newtio);
73 // Put the selected line in the tty input buffer
74 for(char *k = line; *k; k++) {
75 ioctl(fd, TIOCSTI, k);
77 // Restore the old settings
78 tcsetattr(fd,TCSANOW, &oldtio);
81 cerr << "Can not open " << tty << "." << endl;
86 //////////////////////////////////////////////////////////////////////
88 int match(char *string, int nb_patterns, char **patterns) {
89 for(int n = 0; n < nb_patterns; n++) {
90 if(strstr(string, patterns[n]) == 0) return 0;
95 //////////////////////////////////////////////////////////////////////
97 void check_opt(int argc, char **argv, int n_opt, int n, const char *help) {
98 if(n_opt + n >= argc) {
99 cerr << "Missing argument for " << argv[n_opt] << "."
101 << "Expecting " << help << "."
107 //////////////////////////////////////////////////////////////////////
109 int previous_visible(int current_line, int nb_lines, char **lines, int nb_patterns, char **patterns) {
110 int line = current_line - 1;
111 while(line >= 0 && !match(lines[line], nb_patterns, patterns)) line--;
115 int next_visible(int current_line, int nb_lines, char **lines, int nb_patterns, char **patterns) {
116 int line = current_line + 1;
117 while(line < nb_lines && !match(lines[line], nb_patterns, patterns)) line++;
125 void update_screen(int *current_line, int *temporary_line, int motion,
126 int nb_lines, char **lines,
130 char buffer[buffer_size];
132 // We split the pattern list into individual patterns
136 for(char *s = pattern_list; *s; s++) {
137 if(*s == pattern_separator) {
142 char splitted_patterns[strlen(pattern_list) + 1];
143 char *patterns[nb_patterns];
145 strcpy(splitted_patterns, pattern_list);
148 char *last_pattern_start = splitted_patterns;
149 for(char *s = splitted_patterns; n < nb_patterns; s++) {
150 if(*s == pattern_separator || *s == '\0') {
152 patterns[n++] = last_pattern_start;
153 last_pattern_start = s + 1;
157 // We now take care of printing the lines per se
159 int console_width = getmaxx(stdscr);
160 int console_height = getmaxy(stdscr);
162 // First, we find a visible line. In priority: The current, or the
163 // first visible after it, or the first visible before it.
166 if(match(lines[*current_line], nb_patterns, patterns)) {
167 new_line = *current_line;
169 new_line = next_visible(*current_line, nb_lines, lines, nb_patterns, patterns);
171 new_line = previous_visible(*current_line, nb_lines, lines, nb_patterns, patterns);
175 // If we found a visible line and we should move, let's move
177 if(new_line >= 0 && motion != 0) {
180 // We want to go down, let's find the first visible line below
181 for(int m = 0; l >= 0 && m < motion; m++) {
182 l = next_visible(l, nb_lines, lines, nb_patterns, patterns);
188 // We want to go up, let's find the first visible line above
189 for(int m = 0; l >= 0 && m < -motion; m++) {
190 l = previous_visible(l, nb_lines, lines, nb_patterns, patterns);
202 use_default_colors();
206 int nb_printed_lines = 1;
208 // Here new_line is either a line number matching the patterns, or -1
212 int first_line = new_line, last_line = new_line, nb_match = 1;
214 // We find the first and last line to show, so that the total of
215 // visible lines between them (them include) is console_height - 1
217 while(nb_match < console_height-1 && (first_line > 0 || last_line < nb_lines - 1)) {
221 while(first_line > 0 && !match(lines[first_line], nb_patterns, patterns)) {
224 if(match(lines[first_line], nb_patterns, patterns)) {
229 if(last_line < nb_lines - 1) {
231 while(last_line < nb_lines - 1 && !match(lines[last_line], nb_patterns, patterns)) {
235 if(match(lines[last_line], nb_patterns, patterns)) {
241 // Now we display them
243 for(int l = first_line; l <= last_line; l++) {
244 if(match(lines[l], nb_patterns, patterns)) {
247 while(lines[l][k] && k < buffer_size - 2 && k < console_width - 2) {
248 buffer[k] = lines[l][k];
252 // We fill the rest of the line with blanks if either we did
253 // not clear() or if this is the highlighted line
255 if(no_blink || l == new_line) {
256 while(k < console_width) {
264 // Highlight the highlighted line ...
268 attron(COLOR_PAIR(2));
269 addnstr(buffer, console_width);
270 attroff(COLOR_PAIR(2));
273 addnstr(buffer, console_width);
277 addnstr(buffer, console_width);
285 *current_line = new_line;
289 *temporary_line = new_line;
291 if(nb_printed_lines == 1) {
292 addnstr("[no selection]\n", console_width);
296 if(no_blink) { // Erase the rest of the window. That's slightly ugly.
298 while(k < console_width) {
303 for(int l = nb_printed_lines; l < console_height; l++) {
304 addnstr(buffer, console_width);
310 sprintf(buffer, "%d/%d pattern: %s",
311 nb_printed_lines - 1,
315 for(int k = strlen(buffer); k < console_width; k++) buffer[k] = ' ';
316 buffer[console_width] = '\0';
320 attron(COLOR_PAIR(1));
321 addnstr(buffer, console_width);
322 attroff(COLOR_PAIR(1));
325 addnstr(buffer, console_width);
334 //////////////////////////////////////////////////////////////////////
336 int main(int argc, char **argv) {
337 char buffer[buffer_size];
338 char *lines[nb_lines_max];
340 int color_fg_modeline, color_bg_modeline;
341 int color_fg_highlight, color_bg_highlight;
343 color_fg_modeline = COLOR_WHITE;
344 color_bg_modeline = COLOR_BLACK;
345 color_fg_highlight = COLOR_BLACK;
346 color_bg_highlight = COLOR_YELLOW;
348 setlocale(LC_ALL, "");
350 char input_filename[buffer_size], output_filename[buffer_size];
351 strcpy(input_filename, "");
352 strcpy(output_filename, "/tmp/selector.out");
356 if(strcmp(argv[i], "-o") == 0) {
357 check_opt(argc, argv, i, 1, "<output filename>");
358 strncpy(output_filename, argv[i+1], buffer_size);
362 else if(strcmp(argv[i], "-s") == 0) {
363 check_opt(argc, argv, i, 1, "<pattern separator>");
364 pattern_separator = argv[i+1][0];
368 else if(strcmp(argv[i], "-v") == 0) {
369 output_to_vt_buffer = 1;
373 else if(strcmp(argv[i], "-m") == 0) {
378 else if(strcmp(argv[i], "-f") == 0) {
379 check_opt(argc, argv, i, 1, "<input filename>");
380 strncpy(input_filename, argv[i+1], buffer_size);
384 else if(strcmp(argv[i], "-b") == 0) {
389 else if(strcmp(argv[i], "-i") == 0) {
394 else if(strcmp(argv[i], "-z") == 0) {
399 else if(strcmp(argv[i], "-l") == 0) {
400 check_opt(argc, argv, i, 1, "<maximum number of lines>");
401 nb_lines_max = atoi(argv[i+1]);
405 else if(strcmp(argv[i], "-c") == 0) {
406 check_opt(argc, argv, i, 4, "<fg modeline> <bg modeline> <fg highlight> <bg highlight>");
407 color_fg_modeline = atoi(argv[i+1]);
408 color_bg_modeline = atoi(argv[i+2]);
409 color_fg_highlight = atoi(argv[i+3]);
410 color_bg_highlight = atoi(argv[i+4]);
415 cerr << "Selector version " << VERSION
417 << "Written by Francois Fleuret <francois@fleuret.org>"
425 << " [-c <fg modeline> <bg modeline> <fg highlight> <bg highlight>]"
426 << " [-o <output filename>]"
427 << " [-s <pattern separator>]"
428 << " [-l <max number of lines>]"
429 << " -f <input filename>"
431 if(strcmp(argv[i], "-h") == 0) {
439 if(!input_filename[0]) {
440 cerr << "You must specify a input file with -f." << endl;
444 ifstream file(input_filename);
447 cerr << "Can not open " << input_filename << endl;
452 while(nb_lines < nb_lines_max && !file.eof()) {
453 file.getline(buffer, buffer_size);
454 if(strcmp(buffer, "") != 0) {
456 if(zsh_history && *s == ':') {
457 while(*s && *s != ';') s++;
460 lines[nb_lines] = new char[strlen(s) + 1];
461 strcpy(lines[nb_lines], s);
467 for(int i = 0; i < nb_lines/2; i++) {
468 char *s = lines[nb_lines - 1 - i];
469 lines[nb_lines - 1 - i] = lines[i];
474 char patterns[buffer_size];
484 if(color_fg_modeline < 0 || color_fg_modeline >= COLORS ||
485 color_bg_modeline < 0 || color_bg_modeline >= COLORS ||
486 color_fg_highlight < 0 || color_bg_highlight >= COLORS ||
487 color_bg_highlight < 0 || color_bg_highlight >= COLORS) {
491 cerr << "Color numbers have to be between 0 and " << COLORS - 1 << "." << endl;
494 init_pair(1, color_fg_modeline, color_bg_modeline);
495 init_pair(2, color_fg_highlight, color_bg_highlight);
502 curs_set(0); // Hide the cursor
503 keypad(stdscr, TRUE); // So that the arrow keys work
506 int current_line = 0, temporary_line = 0;
508 update_screen(¤t_line, &temporary_line, 0, nb_lines, lines, patterns, no_blink);
516 if(key >= ' ' && key <= '~') {
517 patterns[patterns_point++] = key;
518 patterns[patterns_point] = '\0';
521 else if(key == KEY_BACKSPACE || key == KEY_DC || key == '
\b') {
522 if(patterns_point > 0) {
524 patterns[patterns_point] = '\0';
528 else if(key == KEY_HOME) {
532 else if(key == KEY_END) {
533 current_line = nb_lines - 1;
536 else if(key == KEY_NPAGE) {
540 else if(key == KEY_PPAGE) {
544 else if(key == KEY_UP || key == '
\10') {
548 else if(key == KEY_DOWN || key == '
\ e') {
552 update_screen(¤t_line, &temporary_line, motion,
553 nb_lines, lines, patterns, no_blink);
555 } while(key != '\n' && key != KEY_ENTER && key != '
\a');
561 if((key == KEY_ENTER || key == '\n')) {
562 if(output_to_vt_buffer) {
563 if(temporary_line >= 0 && temporary_line < nb_lines) {
564 inject_into_tty_buffer(lines[temporary_line]);
567 ofstream out(output_filename);
569 cerr << "Can not open " << output_filename << " for writing." << endl;
572 if(temporary_line >= 0 && temporary_line < nb_lines) {
573 out << lines[temporary_line] << endl;
582 for(int l = 0; l < nb_lines; l++) {