chiark - git - mdw - tig/blob - cgit.c

   1 /*
   2  *
   3  *
   4  */
   5
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8 #include <ctype.h>
   9 #include <signal.h>
  10
  11 #include <curses.h>
  12
  13 #define CGIT_HELP "(q)uit, (s)hell, (j) down, (k) up"
  14 #define KEY_ESC 27
  15 #define KEY_TAB 9
  16
  17 /* +------------------------------------+
  18  * |titlewin                            |
  19  * +------------------------------------+
  20  * |mainwin                             |
  21  * |                                    |
  22  * |                                    |
  23  * |                                    |
  24  * |                                    |
  25  * +------------------------------------+
  26  * |statuswin                           |
  27  * +------------------------------------+
  28  */
  29
  30 WINDOW *titlewin;
  31 WINDOW *mainwin;
  32 WINDOW *statuswin;
  33
  34 typedef void (*pipe_filter_T)(char *, int);
  35
  36 FILE *pipe;
  37 long  pipe_lineno;
  38 pipe_filter_T pipe_filter;
  39
  40 /*
  41  * Init and quit
  42  */
  43
  44 static void
  45 quit(int sig)
  46 {
  47         endwin();
  48
  49         /* do your non-curses wrapup here */
  50
  51         exit(0);
  52 }
  53
  54 static void
  55 init_colors(void)
  56 {
  57         int bg = COLOR_BLACK;
  58
  59         start_color();
  60
  61         if (use_default_colors())
  62                 bg = -1;
  63
  64         init_pair(COLOR_BLACK,   COLOR_BLACK,   bg);
  65         init_pair(COLOR_GREEN,   COLOR_GREEN,   bg);
  66         init_pair(COLOR_RED,     COLOR_RED,     bg);
  67         init_pair(COLOR_CYAN,    COLOR_CYAN,    bg);
  68         init_pair(COLOR_WHITE,   COLOR_WHITE,   bg);
  69         init_pair(COLOR_MAGENTA, COLOR_MAGENTA, bg);
  70         init_pair(COLOR_BLUE,    COLOR_BLUE,    bg);
  71         init_pair(COLOR_YELLOW,  COLOR_YELLOW,  bg);
  72 }
  73
  74 static void
  75 init(void)
  76 {
  77         int x, y;
  78
  79         signal(SIGINT, quit);
  80
  81         initscr();      /* initialize the curses library */
  82         nonl();         /* tell curses not to do NL->CR/NL on output */
  83         cbreak();       /* take input chars one at a time, no wait for \n */
  84         noecho();       /* don't echo input */
  85
  86         if (has_colors())
  87                 init_colors();
  88
  89         getmaxyx(stdscr, y, x);
  90
  91         titlewin = newwin(1, 0, 0, 0);
  92
  93         wattrset(titlewin, COLOR_PAIR(COLOR_GREEN));
  94         waddch(titlewin, ACS_VLINE);
  95         wprintw(titlewin, "%s", "cg-view");
  96         waddch(titlewin, ACS_LTEE);
  97         whline(titlewin, ACS_HLINE, x);
  98         wrefresh(titlewin);
  99
 100         statuswin = newwin(1, 0, y - 1, 0);
 101
 102         wattrset(statuswin, COLOR_PAIR(COLOR_GREEN));
 103         wprintw(statuswin, "%s", CGIT_HELP);
 104         wrefresh(statuswin);
 105
 106         mainwin = newwin(y - 2, 0, 1, 0);
 107         scrollok(mainwin, TRUE);
 108         keypad(mainwin, TRUE);  /* enable keyboard mapping */
 109 }
 110
 111 /*
 112  * Pipe filters
 113  */
 114
 115 #define DIFF_CMD        \
 116         "git-rev-list $(git-rev-parse --since=1.month) HEAD^..HEAD | " \
 117         "git-diff-tree --stdin --pretty -r --cc --always"
 118
 119
 120 #define LOG_CMD \
 121         "git-rev-list $(git-rev-parse --since=1.month) HEAD | " \
 122         "git-diff-tree --stdin --pretty -r --root"
 123
 124 static void
 125 log_filter(char *line, int lineno)
 126 {
 127         static int log_filter_skip;
 128
 129         if (!line) {
 130                 wattrset(mainwin, A_NORMAL);
 131                 log_filter_skip = 0;
 132                 return;
 133         }
 134
 135         if (!strncmp("commit ", line, 7)) {
 136                 attrset(COLOR_PAIR(COLOR_GREEN));
 137
 138         } else if (!strncmp("Author: ", line, 8)) {
 139                 wattrset(mainwin, COLOR_PAIR(COLOR_CYAN));
 140
 141         } else if (!strncmp("Date:   ", line, 6)) {
 142                 wattrset(mainwin, COLOR_PAIR(COLOR_YELLOW));
 143
 144         } else if (!strncmp("diff --git ", line, 11)) {
 145                 wattrset(mainwin, COLOR_PAIR(COLOR_YELLOW));
 146
 147         } else if (!strncmp("diff-tree ", line, 10)) {
 148                 wattrset(mainwin, COLOR_PAIR(COLOR_BLUE));
 149
 150         } else if (!strncmp("index ", line, 6)) {
 151                 wattrset(mainwin, COLOR_PAIR(COLOR_BLUE));
 152
 153         } else if (line[0] == '-') {
 154                 wattrset(mainwin, COLOR_PAIR(COLOR_RED));
 155
 156         } else if (line[0] == '+') {
 157                 wattrset(mainwin, COLOR_PAIR(COLOR_GREEN));
 158
 159         } else if (line[0] == '@') {
 160                 wattrset(mainwin, COLOR_PAIR(COLOR_MAGENTA));
 161
 162         } else if (line[0] == ':') {
 163                 pipe_lineno--;
 164                 log_filter_skip = 1;
 165                 return;
 166
 167         } else if (log_filter_skip) {
 168                 pipe_lineno--;
 169                 log_filter_skip = 0;
 170                 return;
 171
 172         } else {
 173                 wattrset(mainwin, A_NORMAL);
 174         }
 175
 176         mvwaddstr(mainwin, lineno, 0, line);
 177 }
 178
 179 static FILE *
 180 open_pipe(char *cmd, pipe_filter_T filter)
 181 {
 182         pipe = popen(cmd, "r");
 183         pipe_lineno = 1;
 184         pipe_filter = filter;
 185         return pipe;
 186 }
 187
 188 static void
 189 read_pipe(int lines)
 190 {
 191         char buffer[BUFSIZ];
 192         char *line;
 193
 194         while ((line = fgets(buffer, sizeof(buffer), pipe))) {
 195                 pipe_filter(line, pipe_lineno++);
 196                 if (!--lines)
 197                         break;
 198         }
 199
 200         if (feof(pipe) || ferror(pipe)) {
 201                 pipe_filter(NULL, pipe_lineno - 1);
 202                 pclose(pipe);
 203                 pipe = NULL;
 204                 pipe_filter = NULL;
 205         }
 206 }
 207
 208 /*
 209  * Main
 210  */
 211
 212 int
 213 main(int argc, char *argv[])
 214 {
 215         init();
 216
 217         pipe = open_pipe(LOG_CMD, log_filter);
 218
 219         for (;;) {
 220                 int c;
 221
 222                 if (pipe) read_pipe(20);
 223                 if (pipe) nodelay(mainwin, TRUE);
 224
 225                 c = wgetch(mainwin);     /* refresh, accept single keystroke of input */
 226
 227                 if (pipe) nodelay(mainwin, FALSE);
 228
 229                 if (c == ERR)
 230                         continue;
 231
 232                 /* Process the command keystroke */
 233                 switch (c) {
 234                 case KEY_ESC:
 235                 case 'q':
 236                         quit(0);
 237                         return 0;
 238
 239                 case KEY_DOWN:
 240                 case 'j':
 241                         wscrl(mainwin, 1);
 242                         break;
 243
 244                 case KEY_UP:
 245                 case 'k':
 246                         wscrl(mainwin, -1);
 247                         break;
 248
 249                 case 'd':
 250                         pipe = open_pipe(DIFF_CMD, log_filter);
 251                         wclear(mainwin);
 252                         wmove(mainwin, 0, 0);
 253                         break;
 254
 255                 case 'l':
 256                         pipe = open_pipe(LOG_CMD, log_filter);
 257                         wclear(mainwin);
 258                         wmove(mainwin, 0, 0);
 259                         break;
 260
 261                 case 's':
 262                         mvwaddstr(statuswin, 0, 0, "Shelling out......................");
 263                         def_prog_mode();           /* save current tty modes */
 264                         endwin();                  /* restore original tty modes */
 265                         system("sh");              /* run shell */
 266
 267                         wclear(statuswin);
 268                         mvwaddstr(statuswin, 0, 0, CGIT_HELP);
 269                         reset_prog_mode();
 270                         //refresh();                 /* restore save modes, repaint screen */
 271                         break;
 272
 273 /*                default:*/
 274 /*                        if (isprint(c) || isspace(c))*/
 275 /*                                addch(c);*/
 276                 }
 277
 278                 redrawwin(mainwin);
 279                 wrefresh(mainwin);
 280 /*                redrawwin(titlewin);*/
 281 /*                wrefresh(titlewin);*/
 282 /*                redrawwin(statuswin);*/
 283 /*                wrefresh(statuswin);*/
 284         }
 285
 286         quit(0);
 287 }
 288
 289 /*                        addch(ACS_LTEE);*/
 290 /*                        addch(ACS_HLINE);*/