#include <iostream>
#include <fstream>
#include <string.h>
+#include <stdlib.h>
using namespace std;
-ostream *log;
-
-const int buffer_size = 1024;
-const int nb_lines_max = 100000;
+int buffer_size = 1024;
+int nb_lines_max = 100000;
int match(char *string, char *regexp) {
return strstr(string, regexp) != 0;
}
+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, char *regexp) {
+ int line = current_line - 1;
+ while(line >= 0 && !match(lines[line], regexp)) line--;
+ return line;
+}
+
+int next_visible(int current_line, int nb_lines, char **lines, char *regexp) {
+ int line = current_line + 1;
+ while(line < nb_lines && !match(lines[line], regexp)) line++;
+
+ if(line < nb_lines)
+ return line;
+ else
+ return -1;
+}
+
void update_screen(int *current_line, int motion,
int nb_lines, char **lines,
char *regexp, int noblink) {
int console_width = getmaxx(stdscr);
int console_height = getmaxy(stdscr);
- if(!noblink) {
- clear();
- }
-
- use_default_colors();
-
- printw("\n");
-
int nb_printed_lines = 1, last_printer_line = -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(motion >= 0) {
- new_line = *current_line + motion;
- while(new_line < nb_lines && !match(lines[new_line], regexp)) {
- new_line++;
- }
- if(new_line == nb_lines) {
- new_line = *current_line;
- while(new_line >= 0 && ! match(lines[new_line], regexp)) {
- new_line--;
- }
- }
+ if(match(lines[*current_line], regexp)) {
+ new_line = *current_line;
} else {
-
- new_line = *current_line - 1;
- while(new_line >= 0 && ! match(lines[new_line], regexp)) {
- new_line--;
+ new_line = next_visible(*current_line, nb_lines, lines, regexp);
+ if(new_line < 0) {
+ new_line = previous_visible(*current_line, nb_lines, lines, regexp);
}
+ }
- if(new_line < 0) {
- new_line = *current_line;
- while(new_line < nb_lines && !match(lines[new_line], regexp)) {
- new_line++;
+ // 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, regexp);
+ if(l >= 0) {
+ new_line = l;
}
- if(new_line == nb_lines) {
- new_line = -1;
+ } else {
+ // We want to go up, let's find the first visible line above
+ l = previous_visible(new_line, nb_lines, lines, regexp);
+ if(l >= 0) {
+ new_line = l;
}
}
}
+ if(!noblink) {
+ clear();
+ }
+
+ use_default_colors();
+
+ addstr("\n");
+
// Here new_line is either a line number matching the regexp, or -1
if(new_line >= 0) {
+
int first_line = new_line, last_line = new_line, nb_match = 1;
- while(nb_match < console_height && (first_line > 0 || last_line < nb_lines - 1)) {
+ while(nb_match < console_height-1 && (first_line > 0 || last_line < nb_lines - 1)) {
if(first_line > 0) {
first_line--;
buffer[k++] = ' ';
}
}
+
buffer[k++] = '\n';
buffer[k++] = '\0';
if(l == new_line) {
attron(COLOR_PAIR(2));
- printw(buffer);
+ addstr(buffer);
attroff(COLOR_PAIR(2));
} else {
- printw(buffer);
+ addstr(buffer);
}
last_printer_line = l;
}
}
- *current_line = new_line;
+ if(motion != 0) {
+ *current_line = new_line;
+ }
}
if(noblink) { // Erase the rest of the window. That's slightly ugly.
buffer[k++] = '\n';
buffer[k++] = '\0';
for(int l = nb_printed_lines; l < console_height; l++) {
- printw(buffer);
+ addstr(buffer);
}
}
sprintf(buffer, "%d/%d pattern: %s", nb_printed_lines - 1, nb_lines, regexp);
for(int k = strlen(buffer); k < console_width - 1; k++) buffer[k] = ' ';
buffer[console_width-1] = '\0';
- printw(buffer);
+ addstr(buffer);
attroff(COLOR_PAIR(1));
refresh(); // After doing something on the display, we refresh it
int main(int argc, char **argv) {
char buffer[buffer_size];
char *lines[nb_lines_max];
- int noblink = 0;
+ int noblink = 1;
+
+ char input_filename[buffer_size], output_filename[buffer_size];
+ strcpy(input_filename, "/dev/stdin");
+ strcpy(output_filename, "/tmp/selector.out");
+
+ int i = 1;
+ while(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;
+ }
- log = new fstream("/tmp/selector.log");
+ 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;
+ }
- char *file_name;
- char stdin_name[] = "/dev/stdin";
+ else if(strcmp(argv[i], "-b") == 0) {
+ noblink = 1;
+ i++;
+ }
- if(argc == 2 && strcmp(argv[1], "-")) {
- file_name = argv[1];
- } else {
- file_name = stdin_name;
+ 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 {
+ cerr << argv[0] << " [-o <output filename>] [-b] [-l <max number of lines]" << endl;
+ exit(1);
+ }
}
- ifstream file(file_name);
+ ifstream file(input_filename);
if(file.fail()) {
- cerr << "Can not open \"" << file_name << "\"" << endl;
+ cerr << "Can not open \"" << input_filename << "\"" << endl;
return 1;
}
nb_lines++;
}
- char regexp[buffer_size]="";
+ char regexp[buffer_size];
+ regexp[0] = '\0';
int regexp_point;
regexp_point = 0;
keypad(stdscr, TRUE);
start_color();
- init_pair(1, COLOR_WHITE, COLOR_BLACK);
+ // init_pair(1, COLOR_WHITE, COLOR_BLACK);
+ init_pair(1, COLOR_WHITE, COLOR_GREEN);
init_pair(2, COLOR_BLACK, COLOR_YELLOW);
int key;
int line = 0;
- update_screen(&line, 0,
- nb_lines, lines,
- regexp, noblink);
+ update_screen(&line, 0, nb_lines, lines, regexp, noblink);
do {
regexp[regexp_point] = '\0';
}
- else if(key == KEY_BACKSPACE || key == KEY_DC) {
+ else if(key == KEY_BACKSPACE || key == KEY_DC || key == '\b') {
if(regexp_point > 0) {
regexp_point--;
regexp[regexp_point] = '\0';
curs_set(1);
endwin();
- ofstream out("/tmp/selector.out");
- if((key == KEY_ENTER || key == '\n') && line >= 0 && line < nb_lines) {
- out << lines[line] << endl;
+ ofstream out(output_filename);
+ if(out.fail()) {
+ cerr << "Can not open " << output_filename << " for writing." << endl;
+ exit(1);
} else {
- out << endl;
+ if((key == KEY_ENTER || key == '\n') && line >= 0 && line < nb_lines) {
+ out << lines[line] << endl;
+ } else {
+ out << endl;
+ }
+ out.flush();
}
- out.flush();
for(int l = 0; l < nb_lines; l++) {
delete[] lines[l];
}
- log->flush();
- delete log;
-
- return 0;
+ exit(0);
}
projects / selector.git / blobdiff