src/main.c

   1 /* Copyright (c) 2006-2014 Jonas Fonseca <jonas.fonseca@gmail.com>
   2  *
   3  * This program is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU General Public License as
   5  * published by the Free Software Foundation; either version 2 of
   6  * the License, or (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include "tig/repo.h"
  15 #include "tig/options.h"
  16 #include "tig/parse.h"
  17 #include "tig/watch.h"
  18 #include "tig/graph.h"
  19 #include "tig/display.h"
  20 #include "tig/view.h"
  21 #include "tig/draw.h"
  22 #include "tig/git.h"
  23 #include "tig/status.h"
  24 #include "tig/stage.h"
  25 #include "tig/main.h"
  26 #include "tig/diff.h"
  27
  28 /*
  29  * Main view backend
  30  */
  31
  32 DEFINE_ALLOCATOR(realloc_reflogs, char *, 32)
  33
  34 static void
  35 main_register_commit(struct view *view, struct commit *commit, const char *ids, bool is_boundary)
  36 {
  37         struct main_state *state = view->private;
  38
  39         string_copy_rev(commit->id, ids);
  40         if (state->with_graph)
  41                 graph_add_commit(&state->graph, &commit->graph, commit->id, ids, is_boundary);
  42 }
  43
  44 static struct commit *
  45 main_add_commit(struct view *view, enum line_type type, struct commit *template,
  46                 const char *title, bool custom)
  47 {
  48         struct main_state *state = view->private;
  49         size_t titlelen;
  50         struct commit *commit;
  51         char buf[SIZEOF_STR / 2];
  52         struct line *line;
  53
  54         /* FIXME: More graceful handling of titles; append "..." to
  55          * shortened titles, etc. */
  56         string_expand(buf, sizeof(buf), title, 1);
  57         title = buf;
  58         titlelen = strlen(title);
  59
  60         line = add_line_alloc(view, &commit, type, titlelen, custom);
  61         if (!line)
  62                 return NULL;
  63
  64         *commit = *template;
  65         strncpy(commit->title, title, titlelen);
  66         state->graph.canvas = &commit->graph;
  67         memset(template, 0, sizeof(*template));
  68         state->reflogmsg[0] = 0;
  69
  70         view_column_info_update(view, line);
  71         return commit;
  72 }
  73
  74 static inline void
  75 main_flush_commit(struct view *view, struct commit *commit)
  76 {
  77         if (*commit->id)
  78                 main_add_commit(view, LINE_MAIN_COMMIT, commit, "", FALSE);
  79 }
  80
  81 static bool
  82 main_add_changes_commit(struct view *view, enum line_type type, const char *parent, const char *title)
  83 {
  84         char ids[SIZEOF_STR] = NULL_ID " ";
  85         struct main_state *state = view->private;
  86         struct commit commit = {};
  87         struct timeval now;
  88         struct timezone tz;
  89
  90         if (!parent)
  91                 return TRUE;
  92
  93         if (*parent)
  94                 string_copy_rev(ids + STRING_SIZE(NULL_ID " "), parent);
  95         else
  96                 ids[STRING_SIZE(NULL_ID)] = 0;
  97
  98         if (!gettimeofday(&now, &tz)) {
  99                 commit.time.tz = tz.tz_minuteswest * 60;
 100                 commit.time.sec = now.tv_sec - commit.time.tz;
 101         }
 102
 103         commit.author = &unknown_ident;
 104         main_register_commit(view, &commit, ids, FALSE);
 105         if (!main_add_commit(view, type, &commit, title, TRUE))
 106                 return FALSE;
 107
 108         if (state->with_graph) {
 109                 if (*parent)
 110                         return graph_render_parents(&state->graph);
 111                 state->add_changes_parents = TRUE;
 112         }
 113
 114         return TRUE;
 115 }
 116
 117 static bool
 118 main_add_changes_commits(struct view *view, struct main_state *state, const char *parent)
 119 {
 120         const char *staged_parent = NULL_ID;
 121         const char *unstaged_parent = parent;
 122         struct index_diff diff;
 123
 124         if (!index_diff(&diff, FALSE, FALSE))
 125                 return FALSE;
 126
 127         if (!diff.unstaged) {
 128                 unstaged_parent = NULL;
 129                 staged_parent = parent;
 130                 watch_apply(&view->watch, WATCH_INDEX_UNSTAGED_NO);
 131         } else {
 132                 watch_apply(&view->watch, WATCH_INDEX_UNSTAGED_YES);
 133         }
 134
 135         if (!diff.staged) {
 136                 staged_parent = NULL;
 137                 watch_apply(&view->watch, WATCH_INDEX_STAGED_NO);
 138         } else {
 139                 watch_apply(&view->watch, WATCH_INDEX_STAGED_YES);
 140         }
 141
 142         return main_add_changes_commit(view, LINE_STAT_STAGED, staged_parent, "Staged changes")
 143             && main_add_changes_commit(view, LINE_STAT_UNSTAGED, unstaged_parent, "Unstaged changes");
 144 }
 145
 146 static bool
 147 main_check_argv(struct view *view, const char *argv[])
 148 {
 149         struct main_state *state = view->private;
 150         bool with_reflog = FALSE;
 151         int i;
 152
 153         for (i = 0; argv[i]; i++) {
 154                 const char *arg = argv[i];
 155                 struct rev_flags rev_flags = {};
 156
 157                 if (!strcmp(arg, "--graph")) {
 158                         struct view_column *column = get_view_column(view, VIEW_COLUMN_COMMIT_TITLE);
 159
 160                         if (column) {
 161                                 column->opt.commit_title.graph = TRUE;
 162                                 if (opt_commit_order != COMMIT_ORDER_REVERSE)
 163                                         state->with_graph = TRUE;
 164                         }
 165                         argv[i] = "";
 166                         continue;
 167                 }
 168
 169                 if (!strcmp(arg, "--first-parent"))
 170                         state->first_parent = TRUE;
 171
 172                 if (!argv_parse_rev_flag(arg, &rev_flags))
 173                         continue;
 174
 175                 if (rev_flags.with_reflog)
 176                         with_reflog = TRUE;
 177                 if (!rev_flags.with_graph)
 178                         state->with_graph = FALSE;
 179                 arg += rev_flags.search_offset;
 180                 if (*arg && !*view->env->search)
 181                         string_ncopy(view->env->search, arg, strlen(arg));
 182         }
 183
 184         return with_reflog;
 185 }
 186
 187 static bool
 188 main_with_graph(struct view *view, enum open_flags flags)
 189 {
 190         struct view_column *column = get_view_column(view, VIEW_COLUMN_COMMIT_TITLE);
 191
 192         if (open_in_pager_mode(flags))
 193                 return FALSE;
 194
 195         return column && column->opt.commit_title.graph &&
 196                opt_commit_order != COMMIT_ORDER_REVERSE;
 197 }
 198
 199 static bool
 200 main_open(struct view *view, enum open_flags flags)
 201 {
 202         bool with_graph = main_with_graph(view, flags);
 203         const char *pretty_custom_argv[] = {
 204                 GIT_MAIN_LOG_CUSTOM(encoding_arg, commit_order_arg_with_graph(with_graph),
 205                         "%(cmdlineargs)", "%(revargs)", "%(fileargs)")
 206         };
 207         const char *pretty_raw_argv[] = {
 208                 GIT_MAIN_LOG_RAW(encoding_arg, commit_order_arg_with_graph(with_graph),
 209                         "%(cmdlineargs)", "%(revargs)", "%(fileargs)")
 210         };
 211         struct main_state *state = view->private;
 212         const char **main_argv = pretty_custom_argv;
 213         enum watch_trigger changes_triggers = WATCH_NONE;
 214
 215         if (opt_show_changes && repo.is_inside_work_tree)
 216                 changes_triggers |= WATCH_INDEX;
 217
 218         state->with_graph = with_graph;
 219
 220         if (opt_rev_args && main_check_argv(view, opt_rev_args))
 221                 main_argv = pretty_raw_argv;
 222
 223         if (open_in_pager_mode(flags)) {
 224                 changes_triggers = WATCH_NONE;
 225         }
 226
 227         /* This calls reset_view() so must be before adding changes commits. */
 228         if (!begin_update(view, NULL, main_argv, flags))
 229                 return FALSE;
 230
 231         /* Register watch before changes commits are added to record the
 232          * start. */
 233         if (view_can_refresh(view))
 234                 watch_register(&view->watch, WATCH_HEAD | WATCH_REFS | changes_triggers);
 235
 236         if (changes_triggers)
 237                 main_add_changes_commits(view, state, "");
 238
 239         return TRUE;
 240 }
 241
 242 void
 243 main_done(struct view *view)
 244 {
 245         struct main_state *state = view->private;
 246         int i;
 247
 248         for (i = 0; i < view->lines; i++) {
 249                 struct commit *commit = view->line[i].data;
 250
 251                 free(commit->graph.symbols);
 252         }
 253
 254         for (i = 0; i < state->reflogs; i++)
 255                 free(state->reflog[i]);
 256         free(state->reflog);
 257 }
 258
 259 #define main_check_commit_refs(line)    !((line)->no_commit_refs)
 260 #define main_mark_no_commit_refs(line)  (((struct line *) (line))->no_commit_refs = 1)
 261
 262 static inline struct ref_list *
 263 main_get_commit_refs(const struct line *line, struct commit *commit)
 264 {
 265         struct ref_list *refs = NULL;
 266
 267         if (main_check_commit_refs(line) && !(refs = get_ref_list(commit->id)))
 268                 main_mark_no_commit_refs(line);
 269
 270         return refs;
 271 }
 272
 273 bool
 274 main_get_column_data(struct view *view, const struct line *line, struct view_column_data *column_data)
 275 {
 276         struct main_state *state = view->private;
 277         struct commit *commit = line->data;
 278         struct ref_list *refs = NULL;
 279
 280         column_data->author = commit->author;
 281         column_data->date = &commit->time;
 282         column_data->id = commit->id;
 283         if (state->reflogs)
 284                 column_data->reflog = state->reflog[line->lineno - 1];
 285
 286         column_data->commit_title = commit->title;
 287         if (state->with_graph)
 288                 column_data->graph = &commit->graph;
 289
 290         if ((refs = main_get_commit_refs(line, commit)))
 291                 column_data->refs = refs;
 292
 293         return TRUE;
 294 }
 295
 296 static bool
 297 main_add_reflog(struct view *view, struct main_state *state, char *reflog)
 298 {
 299         char *end = strchr(reflog, ' ');
 300         int id_width;
 301
 302         if (!end)
 303                 return FALSE;
 304         *end = 0;
 305
 306         if (!realloc_reflogs(&state->reflog, state->reflogs, 1)
 307             || !(reflog = strdup(reflog)))
 308                 return FALSE;
 309
 310         state->reflog[state->reflogs++] = reflog;
 311         id_width = strlen(reflog);
 312         if (state->reflog_width < id_width) {
 313                 struct view_column *column = get_view_column(view, VIEW_COLUMN_ID);
 314
 315                 state->reflog_width = id_width;
 316                 if (column && column->opt.id.display)
 317                         view->force_redraw = TRUE;
 318         }
 319
 320         return TRUE;
 321 }
 322
 323 /* Reads git log --pretty=raw output and parses it into the commit struct. */
 324 bool
 325 main_read(struct view *view, struct buffer *buf)
 326 {
 327         struct main_state *state = view->private;
 328         struct graph *graph = &state->graph;
 329         enum line_type type;
 330         struct commit *commit = &state->current;
 331         char *line;
 332
 333         if (!buf) {
 334                 main_flush_commit(view, commit);
 335
 336                 if (failed_to_load_initial_view(view))
 337                         die("No revisions match the given arguments.");
 338                 if (view->lines > 0) {
 339                         struct commit *last = view->line[view->lines - 1].data;
 340
 341                         view->line[view->lines - 1].dirty = 1;
 342                         if (!last->author) {
 343                                 view->lines--;
 344                                 free(last);
 345                         }
 346                 }
 347
 348                 if (state->with_graph)
 349                         done_graph(graph);
 350                 return TRUE;
 351         }
 352
 353         line = buf->data;
 354         type = get_line_type(line);
 355         if (type == LINE_COMMIT) {
 356                 bool is_boundary;
 357                 char *author;
 358
 359                 state->in_header = TRUE;
 360                 line += STRING_SIZE("commit ");
 361                 is_boundary = *line == '-';
 362                 while (*line && !isalnum(*line))
 363                         line++;
 364
 365                 if (state->add_changes_parents) {
 366                         state->add_changes_parents = FALSE;
 367                         if (!graph_add_parent(graph, line))
 368                                 return FALSE;
 369                         graph->has_parents = TRUE;
 370                         graph_render_parents(graph);
 371                 }
 372
 373                 main_flush_commit(view, commit);
 374
 375                 author = io_memchr(buf, line, 0);
 376
 377                 if (state->first_parent) {
 378                         char *parent = strchr(line, ' ');
 379                         char *parent_end = parent ? strchr(parent + 1, ' ') : NULL;
 380
 381                         if (parent_end)
 382                                 *parent_end = 0;
 383
 384                         io_trace("[parent] %s\n", line);
 385                 }
 386
 387                 main_register_commit(view, &state->current, line, is_boundary);
 388
 389                 if (author) {
 390                         char *title = io_memchr(buf, author, 0);
 391
 392                         parse_author_line(author, &commit->author, &commit->time);
 393                         if (state->with_graph)
 394                                 graph_render_parents(graph);
 395                         if (title)
 396                                 main_add_commit(view, LINE_MAIN_COMMIT, commit, title, FALSE);
 397                 }
 398
 399                 return TRUE;
 400         }
 401
 402         if (!*commit->id)
 403                 return TRUE;
 404
 405         /* Empty line separates the commit header from the log itself. */
 406         if (*line == '\0')
 407                 state->in_header = FALSE;
 408
 409         switch (type) {
 410         case LINE_PP_REFLOG:
 411                 if (!main_add_reflog(view, state, line + STRING_SIZE("Reflog: ")))
 412                         return FALSE;
 413                 break;
 414
 415         case LINE_PP_REFLOGMSG:
 416                 line += STRING_SIZE("Reflog message: ");
 417                 string_ncopy(state->reflogmsg, line, strlen(line));
 418                 break;
 419
 420         case LINE_PARENT:
 421                 if (state->with_graph && !graph->has_parents)
 422                         graph_add_parent(graph, line + STRING_SIZE("parent "));
 423                 break;
 424
 425         case LINE_AUTHOR:
 426                 parse_author_line(line + STRING_SIZE("author "),
 427                                   &commit->author, &commit->time);
 428                 if (state->with_graph)
 429                         graph_render_parents(graph);
 430                 break;
 431
 432         default:
 433                 /* Fill in the commit title if it has not already been set. */
 434                 if (*commit->title)
 435                         break;
 436
 437                 /* Skip lines in the commit header. */
 438                 if (state->in_header)
 439                         break;
 440
 441                 /* Require titles to start with a non-space character at the
 442                  * offset used by git log. */
 443                 if (strncmp(line, "    ", 4))
 444                         break;
 445                 line += 4;
 446                 /* Well, if the title starts with a whitespace character,
 447                  * try to be forgiving.  Otherwise we end up with no title. */
 448                 while (isspace(*line))
 449                         line++;
 450                 if (*line == '\0')
 451                         break;
 452                 if (*state->reflogmsg)
 453                         line = state->reflogmsg;
 454                 main_add_commit(view, LINE_MAIN_COMMIT, commit, line, FALSE);
 455         }
 456
 457         return TRUE;
 458 }
 459
 460 enum request
 461 main_request(struct view *view, enum request request, struct line *line)
 462 {
 463         enum open_flags flags = (view_is_displayed(view) && request != REQ_VIEW_DIFF)
 464                                 ? OPEN_SPLIT : OPEN_DEFAULT;
 465
 466         switch (request) {
 467         case REQ_NEXT:
 468         case REQ_PREVIOUS:
 469                 if (view_is_displayed(view) && display[0] != view)
 470                         return request;
 471                 /* Do not pass navigation requests to the branch view
 472                  * when the main view is maximized. (GH #38) */
 473                 return request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
 474
 475         case REQ_VIEW_DIFF:
 476         case REQ_ENTER:
 477                 if (view_is_displayed(view) && display[0] != view)
 478                         maximize_view(view, TRUE);
 479
 480                 if (line->type == LINE_STAT_UNSTAGED
 481                     || line->type == LINE_STAT_STAGED)
 482                         open_stage_view(view, NULL, line->type, flags);
 483                 else
 484                         open_diff_view(view, flags);
 485                 break;
 486
 487         case REQ_REFRESH:
 488                 load_refs(TRUE);
 489                 refresh_view(view);
 490                 break;
 491
 492         default:
 493                 return request;
 494         }
 495
 496         return REQ_NONE;
 497 }
 498
 499 static void
 500 main_update_env(struct view *view, struct line *line, struct commit *commit)
 501 {
 502         struct ref_list *list = main_get_commit_refs(line, commit);
 503         size_t i;
 504
 505         for (i = 0; list && i < list->size; i++)
 506                 ref_update_env(view->env, list->refs[list->size - i - 1], !i);
 507 }
 508
 509 void
 510 main_select(struct view *view, struct line *line)
 511 {
 512         struct commit *commit = line->data;
 513
 514         if (line->type == LINE_STAT_STAGED || line->type == LINE_STAT_UNSTAGED) {
 515                 string_ncopy(view->ref, commit->title, strlen(commit->title));
 516                 status_stage_info(view->env->status, line->type, NULL);
 517         } else {
 518                 string_copy_rev(view->ref, commit->id);
 519                 main_update_env(view, line, commit);
 520         }
 521         string_copy_rev(view->env->commit, commit->id);
 522 }
 523
 524 static struct view_ops main_ops = {
 525         "commit",
 526         argv_env.head,
 527         VIEW_SEND_CHILD_ENTER | VIEW_FILE_FILTER | VIEW_LOG_LIKE | VIEW_REFRESH,
 528         sizeof(struct main_state),
 529         main_open,
 530         main_read,
 531         view_column_draw,
 532         main_request,
 533         view_column_grep,
 534         main_select,
 535         main_done,
 536         view_column_bit(AUTHOR) | view_column_bit(COMMIT_TITLE) |
 537                 view_column_bit(DATE) | view_column_bit(ID) |
 538                 view_column_bit(LINE_NUMBER),
 539         main_get_column_data,
 540 };
 541
 542 DEFINE_VIEW(main);
 543
 544 /* vim: set ts=8 sw=8 noexpandtab: */