X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?a=blobdiff_plain;f=selector.cc;h=f15154f7ef9580d4cb57313675d7ea3b7807fba8;hb=8b56e5dd7732160ba0a5bad96dc5bb41e300d809;hp=0d5a30e4fd6fddbd694b1d759b0df39258e74724;hpb=e709c3d6192cd94251e827c430e81cc933bf56e5;p=selector.git diff --git a/selector.cc b/selector.cc index 0d5a30e..f15154f 100644 --- a/selector.cc +++ b/selector.cc @@ -1,76 +1,320 @@ +/* + * selector is a simple shell command for selection of strings with a + * dynamic pattern-matching. + * + * Copyright (c) 2008 Francois Fleuret + * Written by Francois Fleuret + * + * This file is part of selector. + * + * selector is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 3 as + * published by the Free Software Foundation. + * + * selector is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with selector. If not, see . + * + */ -/////////////////////////////////////////////////////////////////////////// -// START_IP_HEADER // -// // -// This program is free software: you can redistribute it and/or modify // -// it under the terms of the version 3 of the GNU General Public License // -// as published by the Free Software Foundation. // -// // -// This program is distributed in the hope that it will be useful, but // -// WITHOUT ANY WARRANTY; without even the implied warranty of // -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // -// General Public License for more details. // -// // -// You should have received a copy of the GNU General Public License // -// along with this program. If not, see . // -// // -// Written by and Copyright (C) Francois Fleuret // -// Contact for comments & bug reports // -// // -// END_IP_HEADER // -/////////////////////////////////////////////////////////////////////////// +/* + + Here is the magical shell script for a smart bash-history. Note that + the line remains in /tmp/selector.out, which may be a scurity concern. + + ./selector -f ~/.bash_history + OLD_SETTINGS=`stty -g` + stty -echo raw + writevt `tty` "`cat /tmp/selector.out`" + stty ${OLD_SETTINGS} + +*/ #include #include #include #include #include +#include using namespace std; -const int buffer_size = 1024; -const int nb_lines_max = 1000; +int buffer_size = 1024; +int nb_lines_max = 100000; +char pattern_separator = ';'; + +int match(char *string, int nb_patterns, char **patterns) { + for(int n = 0; n < nb_patterns; n++) { + if(strstr(string, patterns[n]) == 0) return 0; + } + return 1; +} + +void check_opt(int argc, char **argv, int n_opt, int n, const char *help) { + if(n_opt + n >= argc) { + cerr << "Missing argument for " << argv[n_opt] << ". Expecting " << help << "." << endl; + exit(1); + } +} + +int previous_visible(int current_line, int nb_lines, char **lines, int nb_patterns, char **patterns) { + int line = current_line - 1; + while(line >= 0 && !match(lines[line], nb_patterns, patterns)) line--; + return line; +} + +int next_visible(int current_line, int nb_lines, char **lines, int nb_patterns, char **patterns) { + int line = current_line + 1; + while(line < nb_lines && !match(lines[line], nb_patterns, patterns)) 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, + char *pattern_list, + int noblink) { -void build_display(int nb_lines, char **lines, char *regexp) { char buffer[buffer_size]; - clear(); // Cleaning the window - refresh(); // After doing something on the display, we refresh it - int maxx = getmaxx(stdscr); - int maxy = getmaxy(stdscr); - printw("maxx %d maxy %d\n", maxx, maxy); - printw("nb_lines %d\n", nb_lines); - int nb_printed_lines = 2; - for(int y = 0; nb_printed_lines < maxy && y < nb_lines; y++) { + + // We split the pattern list into individual patterns + + int nb_patterns = 1; + + for(char *s = pattern_list; *s; s++) { + if(*s == pattern_separator) { + nb_patterns++; + } + } + + char splitted_patterns[strlen(pattern_list) + 1]; + char *patterns[nb_patterns]; + + strcpy(splitted_patterns, pattern_list); + + int n = 0; + char *last_pattern_start = splitted_patterns; + for(char *s = splitted_patterns; n < nb_patterns; s++) { + if(*s == pattern_separator || *s == '\0') { + *s = '\0'; + patterns[n++] = last_pattern_start; + last_pattern_start = s + 1; + } + } + + // We now take care of printing the lines per se + + int console_width = getmaxx(stdscr); + int console_height = getmaxy(stdscr); + + int nb_printed_lines = 1; + + // First, we find a visible line. In priority: The current, or the + // first visible after it, or the first visible before it. + + int new_line; + if(match(lines[*current_line], nb_patterns, patterns)) { + new_line = *current_line; + } else { + new_line = next_visible(*current_line, nb_lines, lines, nb_patterns, patterns); + if(new_line < 0) { + new_line = previous_visible(*current_line, nb_lines, lines, nb_patterns, patterns); + } + } + + // If we found a visible line and we should move, let's move + + if(new_line >= 0 && motion != 0) { + int l = new_line; + l += motion; + + if(motion > 0) { + // We want to go down, let's find the first visible line below + l = next_visible(new_line, nb_lines, lines, nb_patterns, patterns); + if(l >= 0) { + new_line = l; + } + } else { + // We want to go up, let's find the first visible line above + l = previous_visible(new_line, nb_lines, lines, nb_patterns, patterns); + if(l >= 0) { + new_line = l; + } + } + } + + if(!noblink) { + clear(); + } + + use_default_colors(); + + addstr("\n"); + + // 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], nb_patterns, patterns)) { + first_line--; + } + if(match(lines[first_line], nb_patterns, patterns)) { + nb_match++; + } + } + + if(last_line < nb_lines - 1) { + last_line++; + while(last_line < nb_lines - 1 && !match(lines[last_line], nb_patterns, patterns)) { + last_line++; + } + + if(match(lines[last_line], nb_patterns, patterns)) { + nb_match++; + } + } + } + + // Now we display them + + for(int l = first_line; l <= last_line; l++) { + if(match(lines[l], nb_patterns, patterns)) { + int k = 0; + + while(lines[l][k] && k < buffer_size - 2 && k < console_width - 2) { + buffer[k] = lines[l][k]; + k++; + } + + if(noblink || l == new_line) { + while(k < console_width) { + buffer[k++] = ' '; + } + } + + buffer[k++] = '\n'; + buffer[k++] = '\0'; + + if(l == new_line) { + attron(COLOR_PAIR(2)); + addnstr(buffer, console_width); + attroff(COLOR_PAIR(2)); + } else { + addnstr(buffer, console_width); + } + + nb_printed_lines++; + } + } + + *temporary_line = new_line; + if(motion != 0) { + *current_line = new_line; + } + } + + if(noblink) { // Erase the rest of the window. That's slightly ugly. int k = 0; - while(lines[y][k] && k < buffer_size - 2 && k < maxx) { - buffer[k] = lines[y][k]; - k++; + while(k < console_width) { + buffer[k++] = ' '; } buffer[k++] = '\n'; buffer[k++] = '\0'; - printw(buffer); - nb_printed_lines++; + for(int l = nb_printed_lines; l < console_height; l++) { + addnstr(buffer, console_width); + } } + + // Draw the modeline + + sprintf(buffer, "%d/%d pattern: %s", + nb_printed_lines - 1, + nb_lines, + pattern_list); + + for(int k = strlen(buffer); k < console_width; k++) buffer[k] = ' '; + buffer[console_width] = '\0'; + + move(0, 0); + attron(COLOR_PAIR(1)); + addnstr(buffer, console_width); + attroff(COLOR_PAIR(1)); + + refresh(); // After doing something on the display, we refresh it } -int main(int argc, char **argv) { - int dummy, xpos, ypos; +////////////////////////////////////////////////////////////////////// +int main(int argc, char **argv) { char buffer[buffer_size]; char *lines[nb_lines_max]; + int noblink = 0; - ifstream file(argv[1]); + char input_filename[buffer_size], output_filename[buffer_size]; + strcpy(input_filename, "/dev/stdin"); + strcpy(output_filename, "/tmp/selector.out"); - if(argc != 2) { - cerr << argv[0] << " " << endl; - return 1; + int i = 1; + while(i < argc) { + if(strcmp(argv[i], "-o") == 0) { + check_opt(argc, argv, i, 1, ""); + 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 = argv[i+1][0]; + i += 2; + } + + else if(strcmp(argv[i], "-f") == 0) { + check_opt(argc, argv, i, 1, ""); + strncpy(input_filename, argv[i+1], buffer_size); + i += 2; + } + + else if(strcmp(argv[i], "-b") == 0) { + noblink = 1; + i++; + } + + else if(strcmp(argv[i], "-l") == 0) { + check_opt(argc, argv, i, 1, ""); + nb_lines_max = atoi(argv[i+1]); + i += 2; + } + + else { + cerr << argv[0] << " [-h] [-o ] [-b] [-l ] [-s ]" << endl; + if(strcmp(argv[i], "-h") == 0) { + exit(0); + } else { + exit(1); + } + } } + ifstream file(input_filename); + if(file.fail()) { - cerr << "Can not open \"" - << argv[1] - << "\"" - << endl; + cerr << "Can not open \"" << input_filename << "\"" << endl; return 1; } @@ -82,48 +326,83 @@ int main(int argc, char **argv) { nb_lines++; } - char regexp[buffer_size]=""; - int regexp_point; - regexp_point = 0; + char patterns[buffer_size]; + patterns[0] = '\0'; + int patterns_point; + patterns_point = 0; - initscr(); // Necessary to start a curses session + initscr(); - if (has_colors()) { - cout << "You can use color on this terminal" << endl; - } else { - cout << "No colors." << endl; + if(!has_colors()) { + cerr << "No colors." << endl; return 1; } - noecho(); // I don't want echo when I press a key - curs_set(0); // I don't want to see the cursor - - start_color(); // We will use colors - init_pair(1, COLOR_RED, COLOR_BLACK); // red on black for error messages + noecho(); + curs_set(0); + keypad(stdscr, TRUE); - // attron(COLOR_PAIR(1)); // Let's print something in red on black - // printw("Hello world\n"); // That's how we print something! - // attroff(COLOR_PAIR(1)); // Let's get back to default colors! + start_color(); + // init_pair(1, COLOR_WHITE, COLOR_BLACK); + init_pair(1, COLOR_WHITE, COLOR_GREEN); + init_pair(2, COLOR_BLACK, COLOR_YELLOW); - printw("Press a key to contine\n"); int key; + int current_line = 0, temporary_line = 0; + + update_screen(¤t_line, &temporary_line, 0, nb_lines, lines, patterns, noblink); + do { - build_display(nb_lines, lines, regexp); + key = getch(); - if(key >= 'a' && key <= 'z') { - regexp[regexp_point++] = key; - regexp[regexp_point] = '\0'; + + int motion = 0; + + if(key >= ' ' && key <= 'z') { + patterns[patterns_point++] = key; + patterns[patterns_point] = '\0'; + } + + else if(key == KEY_BACKSPACE || key == KEY_DC || key == '') { + if(patterns_point > 0) { + patterns_point--; + patterns[patterns_point] = '\0'; + } } - } while(key != 'q'); - echo(); // We want to have echo - curs_set(1); // We want to see the cursor again - endwin(); // Back to normal + else if(key == KEY_UP || key == '') { + motion = -1; + } + + else if(key == KEY_DOWN || key == '') { + motion = 1; + } + + update_screen(¤t_line, &temporary_line, motion, + nb_lines, lines, patterns, noblink); + } while(key != '\n' && key != KEY_ENTER && key != ''); + + echo(); + curs_set(1); + endwin(); + + ofstream out(output_filename); + if(out.fail()) { + cerr << "Can not open " << output_filename << " for writing." << endl; + exit(1); + } else { + if((key == KEY_ENTER || key == '\n') && temporary_line >= 0 && temporary_line < nb_lines) { + out << lines[temporary_line] << endl; + } else { + out << endl; + } + out.flush(); + } for(int l = 0; l < nb_lines; l++) { delete[] lines[l]; } - return 0; + exit(0); }