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"
 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                 log_filter_skip = 1;
 164                 return;
 165
 166         } else if (log_filter_skip) {
 167                 log_filter_skip = 0;
 168                 return;
 169
 170         } else {
 171                 wattrset(mainwin, A_NORMAL);
 172         }
 173
 174         mvwaddstr(mainwin, lineno, 0, line);
 175 }
 176
 177 static FILE *
 178 open_pipe(char *cmd, pipe_filter_T filter)
 179 {
 180         pipe = popen(cmd, "r");
 181         pipe_lineno = 1;
 182         pipe_filter = filter;
 183         return pipe;
 184 }
 185
 186 static void
 187 read_pipe(int lines)
 188 {
 189         char buffer[BUFSIZ];
 190         char *line;
 191
 192         while ((line = fgets(buffer, sizeof(buffer), pipe))) {
 193                 pipe_filter(line, pipe_lineno++);
 194                 if (!--lines)
 195                         break;
 196         }
 197
 198         if (feof(pipe) || ferror(pipe)) {
 199                 pipe_filter(NULL, pipe_lineno - 1);
 200                 pclose(pipe);
 201                 pipe = NULL;
 202                 pipe_filter = NULL;
 203         }
 204 }
 205
 206 /*
 207  * Main
 208  */
 209
 210 int
 211 main(int argc, char *argv[])
 212 {
 213         init();
 214
 215         pipe = open_pipe(LOG_CMD, log_filter);
 216
 217         for (;;) {
 218                 int c;
 219
 220                 if (pipe) read_pipe(20);
 221                 if (pipe) nodelay(mainwin, TRUE);
 222
 223                 c = wgetch(mainwin);     /* refresh, accept single keystroke of input */
 224
 225                 if (pipe) nodelay(mainwin, FALSE);
 226
 227                 if (c == ERR)
 228                         continue;
 229
 230                 /* Process the command keystroke */
 231                 switch (c) {
 232                 case KEY_ESC:
 233                 case 'q':
 234                         quit(0);
 235                         return 0;
 236
 237                 case KEY_DOWN:
 238                 case 'j':
 239                         wscrl(mainwin, 1);
 240                         break;
 241
 242                 case KEY_UP:
 243                 case 'k':
 244                         wscrl(mainwin, -1);
 245                         break;
 246
 247                 case 'd':
 248                         pipe = open_pipe(DIFF_CMD, log_filter);
 249                         wclear(mainwin);
 250                         wmove(mainwin, 0, 0);
 251                         break;
 252
 253                 case 'l':
 254                         pipe = open_pipe(LOG_CMD, log_filter);
 255                         wclear(mainwin);
 256                         wmove(mainwin, 0, 0);
 257                         break;
 258
 259                 case 's':
 260                         mvwaddstr(statuswin, 0, 0, "Shelling out......................");
 261                         def_prog_mode();           /* save current tty modes */
 262                         endwin();                  /* restore original tty modes */
 263                         system("sh");              /* run shell */
 264
 265                         wclear(statuswin);
 266                         mvwaddstr(statuswin, 0, 0, CGIT_HELP);
 267                         reset_prog_mode();
 268                         //refresh();                 /* restore save modes, repaint screen */
 269                         break;
 270
 271 /*                default:*/
 272 /*                        if (isprint(c) || isspace(c))*/
 273 /*                                addch(c);*/
 274                 }
 275
 276                 redrawwin(mainwin);
 277                 wrefresh(mainwin);
 278 /*                redrawwin(titlewin);*/
 279 /*                wrefresh(titlewin);*/
 280 /*                redrawwin(statuswin);*/
 281 /*                wrefresh(statuswin);*/
 282         }
 283
 284         quit(0);
 285 }
 286
 287 /*                        addch(ACS_LTEE);*/
 288 /*                        addch(ACS_HLINE);*/