+void free_matcher(matcher_t *matcher) {
+ if(matcher->nb_patterns >= 0) {
+ delete[] matcher->splitted_patterns;
+ delete[] matcher->patterns;
+ } else {
+ if(!matcher->regexp_error) regfree(&matcher->preg);
+ }
+}
+
+void initialize_matcher(int use_regexp, int case_sensitive,
+ matcher_t *matcher, const char *pattern) {
+
+ if(use_regexp) {
+ matcher->nb_patterns = -1;
+ matcher->regexp_error = regcomp(&matcher->preg, pattern, case_sensitive ? 0 : REG_ICASE);
+ } else {
+ matcher->regexp_error = 0;
+ matcher->nb_patterns = 1;
+ matcher->case_sensitive = case_sensitive;
+
+ for(const char *s = pattern; *s; s++) {
+ if(*s == pattern_separator) {
+ matcher->nb_patterns++;
+ }
+ }
+
+ matcher->splitted_patterns = new char[strlen(pattern) + 1];
+ matcher->patterns = new char*[matcher->nb_patterns];
+
+ strcpy(matcher->splitted_patterns, pattern);
+
+ int n = 0;
+ char *last_pattern_start = matcher->splitted_patterns;
+ for(char *s = matcher->splitted_patterns; n < matcher->nb_patterns; s++) {
+ if(*s == pattern_separator || *s == '\0') {
+ *s = '\0';
+ matcher->patterns[n++] = last_pattern_start;
+ last_pattern_start = s + 1;
+ }
+ }
+ }
+}
+
+//////////////////////////////////////////////////////////////////////
+
+int previous_visible(int current_line, int nb_lines, char **lines, matcher_t *matcher) {
+ int line = current_line - 1;
+ while(line >= 0 && !match(lines[line], matcher)) line--;
+ return line;
+}
+
+int next_visible(int current_line, int nb_lines, char **lines, matcher_t *matcher) {
+ int line = current_line + 1;
+ while(line < nb_lines && !match(lines[line], matcher)) line++;
+
+ if(line < nb_lines)
+ return line;
+ else
+ return -1;
+}
+
+//////////////////////////////////////////////////////////////////////
+
+void update_screen(int *current_line, int *temporary_line, int motion,
+ int nb_lines, char **lines,
+ int cursor_position,
+ char *pattern) {
+
+ char buffer[buffer_size];
+ matcher_t matcher;
+
+ initialize_matcher(use_regexp, case_sensitive, &matcher, pattern);
+
+ // We now take care of printing the lines per se
+
+ int console_width = getmaxx(stdscr);
+ int console_height = getmaxy(stdscr);
+
+ // First, we find a visible line. In priority: The current, or the
+ // first visible after it, or the first visible before it.
+
+ int nb_printed_lines = 0;
+
+ clear();
+ use_default_colors();
+ addstr("\n");
+
+ if(matcher.regexp_error) {
+ addstr("[regexp error]");
+ } else if(nb_lines > 0) {
+ int new_line;
+ if(match(lines[*current_line], &matcher)) {
+ new_line = *current_line;
+ } else {
+ new_line = next_visible(*current_line, nb_lines, lines, &matcher);
+ if(new_line < 0) {
+ new_line = previous_visible(*current_line, nb_lines, lines, &matcher);
+ }
+ }
+
+ // If we found a visible line and we should move, let's move
+
+ if(new_line >= 0 && motion != 0) {
+ int l = new_line;
+ if(motion > 0) {
+ // We want to go down, let's find the first visible line below
+ for(int m = 0; l >= 0 && m < motion; m++) {
+ l = next_visible(l, nb_lines, lines, &matcher);
+ if(l >= 0) {
+ new_line = l;
+ }
+ }
+ } else {
+ // We want to go up, let's find the first visible line above
+ for(int m = 0; l >= 0 && m < -motion; m++) {
+ l = previous_visible(l, nb_lines, lines, &matcher);
+ if(l >= 0) {
+ new_line = l;
+ }
+ }
+ }
+ }
+
+ // Here new_line is either a line number matching the patterns, or -1
+
+ if(new_line >= 0) {
+
+ int first_line = new_line, last_line = new_line, nb_match = 1;
+
+ // We find the first and last line to show, so that the total of
+ // visible lines between them (them include) is console_height - 1
+
+ while(nb_match < console_height-1 && (first_line > 0 || last_line < nb_lines - 1)) {
+
+ if(first_line > 0) {
+ first_line--;
+ while(first_line > 0 && !match(lines[first_line], &matcher)) {
+ first_line--;
+ }
+ if(match(lines[first_line], &matcher)) {
+ nb_match++;
+ }
+ }
+
+ if(nb_match < console_height - 1 && last_line < nb_lines - 1) {
+ last_line++;
+ while(last_line < nb_lines - 1 && !match(lines[last_line], &matcher)) {
+ last_line++;
+ }
+
+ if(match(lines[last_line], &matcher)) {
+ nb_match++;
+ }
+ }
+ }
+
+ // Now we display them
+
+ for(int l = first_line; l <= last_line; l++) {
+ if(match(lines[l], &matcher)) {
+ int k = 0;
+
+ while(lines[l][k] && k < buffer_size - 2 && k < console_width - 2) {
+ buffer[k] = lines[l][k];
+ k++;
+ }
+
+ // We fill the rest of the line with blanks if either we did
+ // not clear() or if this is the highlighted line
+
+ if(l == new_line) {
+ while(k < console_width) {
+ buffer[k++] = ' ';
+ }
+ }
+
+ buffer[k++] = '\n';
+ buffer[k++] = '\0';
+
+ // Highlight the highlighted line ...
+
+ if(l == new_line) {
+ if(with_colors) {
+ attron(COLOR_PAIR(2));
+ addnstr(buffer, console_width);
+ attroff(COLOR_PAIR(2));
+ } else {
+ attron(A_STANDOUT);
+ addnstr(buffer, console_width);
+ attroff(A_STANDOUT);
+ }
+ } else {
+ addnstr(buffer, console_width);
+ }
+
+ nb_printed_lines++;
+ }
+ }
+
+ if(motion != 0) {
+ *current_line = new_line;
+ }
+ }
+
+ *temporary_line = new_line;
+
+ if(nb_printed_lines == 0) {
+ addnstr("[no selection]\n", console_width);
+ }
+ } else {
+ addnstr("[empty choice]\n", console_width);
+ }
+
+ // Draw the modeline
+
+ move(0, 0);
+ if(with_colors) {
+ attron(COLOR_PAIR(1));
+ } else {
+ attron(A_REVERSE);
+ }
+
+ for(int k = 0; k < console_width; k++) buffer[k] = ' ';
+ buffer[console_width] = '\0';
+ addnstr(buffer, console_width);
+
+ move(0, 0);
+
+ if(title) {
+ addstr(title);
+ addstr(" ");
+ }
+
+ printw("%d/%d ", nb_printed_lines, nb_lines);
+
+ addnstr(pattern, cursor_position);
+
+ // Now we print the cursor. All that mess to have reverse video with
+ // and without color.
+
+ if(with_colors) {
+ attroff(COLOR_PAIR(1));
+ attron(COLOR_PAIR(3));
+ } else {
+ attroff(A_REVERSE);
+ }
+
+ if(pattern[cursor_position]) {
+ addnstr(&pattern[cursor_position], 1);
+ } else {
+ addstr(" ");
+ }
+
+ if(with_colors) {
+ attroff(COLOR_PAIR(3));
+ attron(COLOR_PAIR(1));
+ } else {
+ attron(A_REVERSE);
+ }
+
+ if(pattern[cursor_position]) {
+ addstr(pattern + cursor_position + 1);
+ }
+
+ // Finished printing the cursor
+
+ if(use_regexp) {
+ addstr(" [regexp]");
+ }
+
+ if(with_colors) {
+ attroff(COLOR_PAIR(1));
+ } else {
+ attroff(A_REVERSE);
+ }
+
+ // We are done
+
+ refresh();
+ free_matcher(&matcher);
+}
+
+//////////////////////////////////////////////////////////////////////
+
+int main(int argc, char **argv) {
+
+ if(!ttyname(STDIN_FILENO)) {
+ cerr << "The standard input is not a tty." << endl;
+ exit(1);
+ }
+
+ char buffer[buffer_size], raw_line[buffer_size];;
+ int color_fg_modeline, color_bg_modeline;
+ int color_fg_highlight, color_bg_highlight;
+
+ color_fg_modeline = COLOR_WHITE;
+ color_bg_modeline = COLOR_BLACK;
+ color_fg_highlight = COLOR_BLACK;
+ color_bg_highlight = COLOR_YELLOW;
+
+ setlocale(LC_ALL, "");
+
+ char input_filename[buffer_size], output_filename[buffer_size];
+
+ strcpy(input_filename, "");
+ strcpy(output_filename, "");
+
+ int i = 1;
+ int error = 0, show_help = 0;
+
+ while(!error && !show_help && i < argc) {
+
+ if(strcmp(argv[i], "-o") == 0) {
+ check_opt(argc, argv, i, 1, "<output filename>");
+ strncpy(output_filename, argv[i+1], buffer_size);
+ i += 2;
+ }
+
+ else if(strcmp(argv[i], "-s") == 0) {
+ check_opt(argc, argv, i, 1, "<pattern separator>");
+ pattern_separator = argv[i+1][0];
+ i += 2;
+ }
+
+ else if(strcmp(argv[i], "-v") == 0) {
+ output_to_vt_buffer = 1;
+ i++;
+ }
+
+ else if(strcmp(argv[i], "-m") == 0) {
+ with_colors = 0;
+ i++;
+ }
+
+ else if(strcmp(argv[i], "-f") == 0) {
+ check_opt(argc, argv, i, 1, "<input filename>");
+ strncpy(input_filename, argv[i+1], buffer_size);
+ i += 2;
+ }
+
+ else if(strcmp(argv[i], "-i") == 0) {
+ inverse_order = 1;
+ i++;
+ }
+
+ else if(strcmp(argv[i], "-b") == 0) {
+ bash_history = 1;
+ i++;
+ }
+
+ else if(strcmp(argv[i], "-z") == 0) {
+ zsh_history = 1;
+ i++;
+ }
+
+ else if(strcmp(argv[i], "-d") == 0) {
+ remove_duplicates = 1;
+ i++;
+ }
+
+ else if(strcmp(argv[i], "-e") == 0) {
+ use_regexp = 1;
+ i++;
+ }
+
+ else if(strcmp(argv[i], "-a") == 0) {
+ case_sensitive = 1;
+ i++;
+ }
+
+ else if(strcmp(argv[i], "-t") == 0) {
+ check_opt(argc, argv, i, 1, "<title>");
+ delete[] title;
+ title = new char[strlen(argv[i+1]) + 1];
+ strcpy(title, argv[i+1]);
+ i += 2;
+ }
+
+ else if(strcmp(argv[i], "-l") == 0) {
+ check_opt(argc, argv, i, 1, "<maximum number of lines>");
+ nb_lines_max = atoi(argv[i+1]);
+ i += 2;
+ }
+
+ else if(strcmp(argv[i], "-c") == 0) {
+ check_opt(argc, argv, i, 4, "<fg modeline> <bg modeline> <fg highlight> <bg highlight>");
+ color_fg_modeline = atoi(argv[i+1]);
+ color_bg_modeline = atoi(argv[i+2]);
+ color_fg_highlight = atoi(argv[i+3]);
+ color_bg_highlight = atoi(argv[i+4]);
+ i += 5;
+ }
+
+ else if(strcmp(argv[i], "-h") == 0) {
+ show_help = 1;
+ i++;
+ }
+
+ else {
+ cerr << "Unknown argument " << argv[i] << "." << endl;
+ error = 1;
+ }
+ }
+
+ if(show_help || error) {
+ cerr << "Selector version " << VERSION << "-R" << REVISION_NUMBER
+ << endl
+ << "Written by Francois Fleuret <francois@fleuret.org>."
+ << endl
+ << endl
+ << "Usage: " << argv[0] << " [options] -f <file>" << endl
+ << endl
+ << " -h show this help" << endl
+ << " -v inject the selected line in the tty" << endl
+ << " -d remove duplicated lines" << endl
+ << " -b remove the bash history line prefix" << endl
+ << " -z remove the zsh history line prefix" << endl
+ << " -i invert the order of lines" << endl
+ << " -e start in regexp mode" << endl
+ << " -a case sensitive" << endl
+ << " -m monochrome mode" << endl
+ << " -t <title>" << endl
+ << " add a title in the modeline" << endl
+ << " -c <fg modeline> <bg modeline> <fg highlight> <bg highlight>" << endl
+ << " set the display colors" << endl
+ << " -o <output filename>" << endl
+ << " set a file to write the selected line to" << endl
+ << " -s <pattern separator>" << endl
+ << " set the symbol to separate substrings in the pattern" << endl
+ << " -l <max number of lines>" << endl
+ << " set the maximum number of lines to take into account" << endl