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

   1 /*
   2  *
   3  *
   4  */
   5
   6 #include <stdarg.h>
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9 #include <string.h>
  10 #include <ctype.h>
  11 #include <signal.h>
  12
  13 #include <curses.h>
  14
  15
  16 #define CGIT_HELP "(q)uit, (s)hell, (j) down, (k) up"
  17 #define KEY_ESC 27
  18 #define KEY_TAB 9
  19
  20 //WINDOW *titlewin;
  21 WINDOW *mainwin;
  22 WINDOW *statuswin;
  23
  24 typedef void (*pipe_filter_T)(char *, int);
  25
  26 FILE *pipe;
  27 long  pipe_lineno;
  28 pipe_filter_T pipe_filter;
  29
  30
  31 static void
  32 put_status(char *msg, ...)
  33 {
  34         va_list args;
  35
  36         va_start(args, msg);
  37         werase(statuswin);
  38         wmove(statuswin, 0, 0);
  39         vwprintw(statuswin, msg, args);
  40         wrefresh(statuswin);
  41         va_end(args);
  42 }
  43
  44 /*
  45  * Init and quit
  46  */
  47
  48 static void
  49 quit(int sig)
  50 {
  51         endwin();
  52
  53         /* do your non-curses wrapup here */
  54
  55         exit(0);
  56 }
  57
  58 static void
  59 init_colors(void)
  60 {
  61         int bg = COLOR_BLACK;
  62
  63         start_color();
  64
  65         if (use_default_colors() != ERR)
  66                 bg = -1;
  67
  68         init_pair(COLOR_BLACK,   COLOR_BLACK,   bg);
  69         init_pair(COLOR_GREEN,   COLOR_GREEN,   bg);
  70         init_pair(COLOR_RED,     COLOR_RED,     bg);
  71         init_pair(COLOR_CYAN,    COLOR_CYAN,    bg);
  72         init_pair(COLOR_WHITE,   COLOR_WHITE,   bg);
  73         init_pair(COLOR_MAGENTA, COLOR_MAGENTA, bg);
  74         init_pair(COLOR_BLUE,    COLOR_BLUE,    bg);
  75         init_pair(COLOR_YELLOW,  COLOR_YELLOW,  bg);
  76 }
  77
  78 static void
  79 init(void)
  80 {
  81         int x, y;
  82
  83         signal(SIGINT, quit);
  84
  85         initscr();      /* initialize the curses library */
  86         nonl();         /* tell curses not to do NL->CR/NL on output */
  87         cbreak();       /* take input chars one at a time, no wait for \n */
  88         noecho();       /* don't echo input */
  89         leaveok(stdscr, TRUE);
  90
  91         if (has_colors())
  92                 init_colors();
  93
  94         getmaxyx(stdscr, y, x);
  95
  96 #if 0
  97         titlewin = newwin(1, 0, y - 2, 0);
  98
  99         wattrset(titlewin, COLOR_PAIR(COLOR_GREEN));
 100         waddch(titlewin, ACS_VLINE);
 101         wprintw(titlewin, "%s", "cg-view");
 102         waddch(titlewin, ACS_LTEE);
 103         whline(titlewin, ACS_HLINE, x);
 104         wrefresh(titlewin);
 105 #endif
 106         statuswin = newwin(1, 0, y - 1, 0);
 107
 108         wattrset(statuswin, COLOR_PAIR(COLOR_GREEN));
 109         put_status(CGIT_HELP);
 110
 111         mainwin = newwin(y - 1, 0, 0, 0);
 112         scrollok(mainwin, TRUE);
 113         keypad(mainwin, TRUE);  /* enable keyboard mapping */
 114 }
 115
 116 /*
 117  * Pipe filters
 118  */
 119
 120 #define DIFF_CMD        \
 121         "git-rev-list HEAD^..HEAD | " \
 122         "git-diff-tree --stdin --pretty -r --cc --always"
 123
 124
 125 #define LOG_CMD \
 126         "git-rev-list $(git-rev-parse --since=1.month) HEAD | " \
 127         "git-diff-tree --stdin --pretty -r --root"
 128
 129 static void
 130 log_filter(char *line, int lineno)
 131 {
 132         static int log_filter_skip;
 133
 134         if (!line) {
 135                 wattrset(mainwin, A_NORMAL);
 136                 log_filter_skip = 0;
 137                 return;
 138         }
 139
 140         if (!strncmp("commit ", line, 7)) {
 141                 attrset(COLOR_PAIR(COLOR_GREEN));
 142
 143         } else if (!strncmp("Author: ", line, 8)) {
 144                 wattrset(mainwin, COLOR_PAIR(COLOR_CYAN));
 145
 146         } else if (!strncmp("Date:   ", line, 6)) {
 147                 wattrset(mainwin, COLOR_PAIR(COLOR_YELLOW));
 148
 149         } else if (!strncmp("diff --git ", line, 11)) {
 150                 wattrset(mainwin, COLOR_PAIR(COLOR_YELLOW));
 151
 152         } else if (!strncmp("diff-tree ", line, 10)) {
 153                 wattrset(mainwin, COLOR_PAIR(COLOR_BLUE));
 154
 155         } else if (!strncmp("index ", line, 6)) {
 156                 wattrset(mainwin, COLOR_PAIR(COLOR_BLUE));
 157
 158         } else if (line[0] == '-') {
 159                 wattrset(mainwin, COLOR_PAIR(COLOR_RED));
 160
 161         } else if (line[0] == '+') {
 162                 wattrset(mainwin, COLOR_PAIR(COLOR_GREEN));
 163
 164         } else if (line[0] == '@') {
 165                 wattrset(mainwin, COLOR_PAIR(COLOR_MAGENTA));
 166
 167         } else if (line[0] == ':') {
 168                 pipe_lineno--;
 169                 log_filter_skip = 1;
 170                 return;
 171
 172         } else if (log_filter_skip) {
 173                 pipe_lineno--;
 174                 log_filter_skip = 0;
 175                 return;
 176
 177         } else {
 178                 wattrset(mainwin, A_NORMAL);
 179         }
 180
 181         mvwaddstr(mainwin, lineno, 0, line);
 182 }
 183
 184 static FILE *
 185 open_pipe(char *cmd, pipe_filter_T filter)
 186 {
 187         pipe = popen(cmd, "r");
 188         pipe_lineno = 0;
 189         pipe_filter = filter;
 190         wclear(mainwin);
 191         wmove(mainwin, 0, 0);
 192         put_status("Loading...");
 193         return pipe;
 194 }
 195
 196 static void
 197 read_pipe(int lines)
 198 {
 199         char buffer[BUFSIZ];
 200         char *line;
 201         int x, y;
 202
 203         while ((line = fgets(buffer, sizeof(buffer), pipe))) {
 204                 int linelen;
 205
 206                 if (!--lines)
 207                         break;
 208
 209                 linelen = strlen(line);
 210                 if (linelen)
 211                         line[linelen - 1] = 0;
 212
 213                 pipe_filter(line, pipe_lineno++);
 214         }
 215
 216         if (feof(pipe) || ferror(pipe)) {
 217                 pipe_filter(NULL, pipe_lineno - 1);
 218                 pclose(pipe);
 219                 pipe = NULL;
 220                 pipe_filter = NULL;
 221                 put_status("%s (lines %d)", CGIT_HELP, pipe_lineno - 1);
 222         }
 223 }
 224
 225 /*
 226  * Main
 227  */
 228
 229 int
 230 main(int argc, char *argv[])
 231 {
 232         init();
 233
 234         //pipe = open_pipe(LOG_CMD, log_filter);
 235
 236         for (;;) {
 237                 int c;
 238
 239                 if (pipe) read_pipe(20);
 240                 if (pipe) nodelay(mainwin, TRUE);
 241
 242                 c = wgetch(mainwin);     /* refresh, accept single keystroke of input */
 243
 244                 if (pipe) nodelay(mainwin, FALSE);
 245
 246                 /* No input from wgetch() with nodelay() enabled. */
 247                 if (c == ERR)
 248                         continue;
 249
 250                 /* Process the command keystroke */
 251                 switch (c) {
 252                 case KEY_ESC:
 253                 case 'q':
 254                         quit(0);
 255                         return 0;
 256
 257                 case KEY_DOWN:
 258                 case 'j':
 259                         wscrl(mainwin, 1);
 260                         break;
 261
 262                 case KEY_UP:
 263                 case 'k':
 264                         wscrl(mainwin, -1);
 265                         break;
 266
 267                 case 'c':
 268                         wclear(mainwin);
 269                         break;
 270
 271                 case 'd':
 272                         pipe = open_pipe(DIFF_CMD, log_filter);
 273                         break;
 274
 275                 case 'l':
 276                         pipe = open_pipe(LOG_CMD, log_filter);
 277                         break;
 278
 279                 case 's':
 280                         mvwaddstr(statuswin, 0, 0, "Shelling out...");
 281                         def_prog_mode();           /* save current tty modes */
 282                         endwin();                  /* restore original tty modes */
 283                         system("sh");              /* run shell */
 284
 285                         werase(statuswin);
 286                         mvwaddstr(statuswin, 0, 0, CGIT_HELP);
 287                         reset_prog_mode();
 288                         break;
 289                 }
 290
 291                 redrawwin(mainwin);
 292                 wrefresh(mainwin);
 293         }
 294
 295         quit(0);
 296 }