mdw@git.distorted.org.uk Git - tig/blob - cgit.c

   1 /**
   2  * gitzilla(1)
   3  * ===========
   4  *
   5  * NAME
   6  * ----
   7  * gitzilla - cursed git browser
   8  *
   9  * SYNOPSIS
  10  * --------
  11  * gitzilla
  12  *
  13  * DESCRIPTION
  14  * -----------
  15  *
  16  * a
  17  *
  18  **/
  19
  20 #include <stdarg.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <ctype.h>
  25 #include <signal.h>
  26
  27 #include <curses.h>
  28
  29 /**
  30  * OPTIONS
  31  * -------
  32  *
  33  * None
  34  *
  35  **/
  36
  37 /**
  38  * KEYS
  39  * ----
  40  *
  41  * q::  quit
  42  * s::  shell
  43  * j::  down
  44  * k::  up
  45  *
  46  **/
  47
  48 #define MSG_HELP "(q)uit, (s)hell, (j) down, (k) up"
  49
  50 #define KEY_ESC 27
  51 #define KEY_TAB 9
  52
  53 struct view {
  54         WINDOW *win;
  55
  56         char *cmd;
  57         void (*reader)(char *, int);
  58         FILE *pipe;
  59
  60         unsigned long lines;
  61         unsigned long lineno;
  62 };
  63
  64 static struct view main_view;
  65 static struct view diff_view;
  66 static struct view log_view;
  67 static struct view status_view;
  68
  69 int do_resize = 1;
  70
  71 static void
  72 put_status(char *msg, ...)
  73 {
  74         va_list args;
  75
  76         va_start(args, msg);
  77         werase(status_view.win);
  78         wmove(status_view.win, 0, 0);
  79         vwprintw(status_view.win, msg, args);
  80         wrefresh(status_view.win);
  81         va_end(args);
  82 }
  83
  84 static void
  85 resize_views(void)
  86 {
  87         int x, y;
  88
  89         getmaxyx(stdscr, y, x);
  90
  91         if (status_view.win)
  92                 delwin(status_view.win);
  93         status_view.win = newwin(1, 0, y - 1, 0);
  94
  95         wattrset(status_view.win, COLOR_PAIR(COLOR_GREEN));
  96         put_status(MSG_HELP);
  97
  98         if (main_view.win)
  99                 delwin(main_view.win);
 100         main_view.win = newwin(y - 1, 0, 0, 0);
 101
 102         scrollok(main_view.win, TRUE);
 103         keypad(main_view.win, TRUE);  /* enable keyboard mapping */
 104         put_status("%d %d", y, x);
 105 }
 106
 107 /*
 108  * Init and quit
 109  */
 110
 111 static void
 112 quit(int sig)
 113 {
 114         endwin();
 115
 116         /* do your non-curses wrapup here */
 117
 118         exit(0);
 119 }
 120
 121 static void
 122 init_colors(void)
 123 {
 124         int bg = COLOR_BLACK;
 125
 126         start_color();
 127
 128         if (use_default_colors() != ERR)
 129                 bg = -1;
 130
 131         init_pair(COLOR_BLACK,   COLOR_BLACK,   bg);
 132         init_pair(COLOR_GREEN,   COLOR_GREEN,   bg);
 133         init_pair(COLOR_RED,     COLOR_RED,     bg);
 134         init_pair(COLOR_CYAN,    COLOR_CYAN,    bg);
 135         init_pair(COLOR_WHITE,   COLOR_WHITE,   bg);
 136         init_pair(COLOR_MAGENTA, COLOR_MAGENTA, bg);
 137         init_pair(COLOR_BLUE,    COLOR_BLUE,    bg);
 138         init_pair(COLOR_YELLOW,  COLOR_YELLOW,  bg);
 139 }
 140
 141 static void
 142 init(void)
 143 {
 144         signal(SIGINT, quit);
 145
 146         initscr();      /* initialize the curses library */
 147         nonl();         /* tell curses not to do NL->CR/NL on output */
 148         cbreak();       /* take input chars one at a time, no wait for \n */
 149         noecho();       /* don't echo input */
 150         leaveok(stdscr, TRUE);
 151         /* curs_set(0); */
 152
 153         if (has_colors())
 154                 init_colors();
 155 }
 156
 157 /*
 158  * Pipe readers
 159  */
 160
 161 #define DIFF_CMD        \
 162         "git log --stat -n1 HEAD ; echo; " \
 163         "git diff --find-copies-harder -B -C HEAD^ HEAD"
 164
 165 #define LOG_CMD \
 166         "git log --stat -n100"
 167
 168 static void
 169 log_reader(char *line, int lineno)
 170 {
 171         static int log_reader_skip;
 172
 173         if (!line) {
 174                 wattrset(main_view.win, A_NORMAL);
 175                 log_reader_skip = 0;
 176                 return;
 177         }
 178
 179         if (!strncmp("commit ", line, 7)) {
 180                 wattrset(main_view.win, COLOR_PAIR(COLOR_GREEN));
 181
 182         } else if (!strncmp("Author: ", line, 8)) {
 183                 wattrset(main_view.win, COLOR_PAIR(COLOR_CYAN));
 184
 185         } else if (!strncmp("Date:   ", line, 8)) {
 186                 wattrset(main_view.win, COLOR_PAIR(COLOR_YELLOW));
 187
 188         } else if (!strncmp("diff --git ", line, 11)) {
 189                 wattrset(main_view.win, COLOR_PAIR(COLOR_YELLOW));
 190
 191         } else if (!strncmp("diff-tree ", line, 10)) {
 192                 wattrset(main_view.win, COLOR_PAIR(COLOR_BLUE));
 193
 194         } else if (!strncmp("index ", line, 6)) {
 195                 wattrset(main_view.win, COLOR_PAIR(COLOR_BLUE));
 196
 197         } else if (line[0] == '-') {
 198                 wattrset(main_view.win, COLOR_PAIR(COLOR_RED));
 199
 200         } else if (line[0] == '+') {
 201                 wattrset(main_view.win, COLOR_PAIR(COLOR_GREEN));
 202
 203         } else if (line[0] == '@') {
 204                 wattrset(main_view.win, COLOR_PAIR(COLOR_MAGENTA));
 205
 206         } else if (line[0] == ':') {
 207                 main_view.lines--;
 208                 log_reader_skip = 1;
 209                 return;
 210
 211         } else if (log_reader_skip) {
 212                 main_view.lines--;
 213                 log_reader_skip = 0;
 214                 return;
 215
 216         } else {
 217                 wattrset(main_view.win, A_NORMAL);
 218         }
 219
 220         mvwaddstr(main_view.win, lineno, 0, line);
 221 }
 222
 223 static struct view *
 224 update_view(struct view *view, char *cmd)
 225 {
 226         view->cmd       = cmd;
 227         view->pipe      = popen(cmd, "r");
 228         view->lines     = 0;
 229         view->lineno    = 0;
 230         view->reader    = log_reader;
 231
 232         wclear(view->win);
 233         wmove(view->win, 0, 0);
 234
 235         put_status("Loading...");
 236
 237         return view;
 238 }
 239
 240 static struct view *
 241 read_pipe(struct view *view, int lines)
 242 {
 243         char buffer[BUFSIZ];
 244         char *line;
 245         int x, y;
 246
 247         while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
 248                 int linelen;
 249
 250                 if (!--lines)
 251                         break;
 252
 253                 linelen = strlen(line);
 254                 if (linelen)
 255                         line[linelen - 1] = 0;
 256
 257                 view->reader(line, view->lines++);
 258         }
 259
 260         if (ferror(view->pipe)) {
 261                 put_status("Failed to read %s", view->cmd, view->lines - 1);
 262
 263         } else if (feof(view->pipe)) {
 264                 put_status("%s (lines %d)", MSG_HELP, view->lines - 1);
 265
 266         } else {
 267                 return view;
 268         }
 269
 270         view->reader(NULL, view->lines - 1);
 271         pclose(view->pipe);
 272         view->pipe = NULL;
 273         view->reader = NULL;
 274 }
 275
 276 /*
 277  * Main
 278  */
 279
 280 int
 281 main(int argc, char *argv[])
 282 {
 283         static struct view *loading_view;
 284
 285         init();
 286
 287         //pipe = open_pipe(LOG_CMD, log_reader);
 288
 289         for (;;) {
 290                 int c;
 291
 292                 if (do_resize) {
 293                         resize_views();
 294                         do_resize = 0;
 295                 }
 296
 297                 if (loading_view && (loading_view = read_pipe(loading_view, 20)))
 298                         nodelay(loading_view->win, TRUE);
 299
 300                 c = wgetch(main_view.win);     /* refresh, accept single keystroke of input */
 301
 302                 if (loading_view)
 303                         nodelay(loading_view->win, FALSE);
 304
 305                 /* No input from wgetch() with nodelay() enabled. */
 306                 if (c == ERR) {
 307                         doupdate();
 308                         continue;
 309                 }
 310
 311                 /* Process the command keystroke */
 312                 switch (c) {
 313                 case KEY_RESIZE:
 314                         fprintf(stderr, "resize");
 315                         exit;
 316                         break;
 317
 318                 case KEY_ESC:
 319                 case 'q':
 320                         quit(0);
 321                         main_view.lineno--;
 322                         return 0;
 323
 324                 case KEY_DOWN:
 325                 case 'j':
 326                 {
 327                         int x, y;
 328
 329                         getmaxyx(main_view.win, y, x);
 330                         if (main_view.lineno + y < main_view.lines) {
 331                                 wscrl(main_view.win, 1);
 332                                 main_view.lineno++;
 333                                 put_status("line %d out of %d (%d%%)",
 334                                            main_view.lineno,
 335                                            main_view.lines,
 336                                            100 * main_view.lineno / main_view.lines);
 337                         } else {
 338                                 put_status("last line reached");
 339                         }
 340                         break;
 341                 }
 342                 case KEY_UP:
 343                 case 'k':
 344                         if (main_view.lineno > 1) {
 345                                 wscrl(main_view.win, -1);
 346                                 main_view.lineno--;
 347                                 put_status("line %d out of %d (%d%%)",
 348                                            main_view.lineno,
 349                                            main_view.lines,
 350                                            100 * main_view.lineno / main_view.lines);
 351                         } else {
 352                                 put_status("first line reached");
 353                         }
 354                         break;
 355
 356                 case 'c':
 357                         wclear(main_view.win);
 358                         break;
 359
 360                 case 'd':
 361                         loading_view = update_view(&main_view, DIFF_CMD);
 362                         break;
 363
 364                 case 'l':
 365                         loading_view = update_view(&main_view, LOG_CMD);
 366                         break;
 367
 368                 case 's':
 369                         mvwaddstr(status_view.win, 0, 0, "Shelling out...");
 370                         def_prog_mode();           /* save current tty modes */
 371                         endwin();                  /* restore original tty modes */
 372                         system("sh");              /* run shell */
 373
 374                         werase(status_view.win);
 375                         mvwaddstr(status_view.win, 0, 0, MSG_HELP);
 376                         reset_prog_mode();
 377                         break;
 378                 }
 379
 380                 redrawwin(main_view.win);
 381                 wrefresh(main_view.win);
 382         }
 383
 384         quit(0);
 385 }
 386
 387 /**
 388  * COPYRIGHT
 389  * ---------
 390  * Copyright (c) Jonas Fonseca, 2006
 391  *
 392  * This program is free software; you can redistribute it and/or modify
 393  * it under the terms of the GNU General Public License as published by
 394  * the Free Software Foundation; either version 2 of the License, or
 395  * (at your option) any later version.
 396  *
 397  * SEE ALSO
 398  * --------
 399  * gitlink:cogito[7],
 400  * gitlink:git[7]
 401  **/