src/main.c

   1 /* Copyright (c) 2006-2015 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 bool
  35 main_status_exists(struct view *view, enum line_type type)
  36 {
  37         struct main_state *state;
  38
  39         refresh_view(view);
  40
  41         state = view->private;
  42         state->goto_line_type = type;
  43         if (type == LINE_STAT_STAGED && state->add_changes_staged)
  44                 return true;
  45         if (type == LINE_STAT_UNSTAGED && state->add_changes_unstaged)
  46                 return true;
  47
  48         return false;
  49 }
  50
  51 static bool main_add_changes(struct view *view, struct main_state *state, const char *parent);
  52
  53 static void
  54 main_register_commit(struct view *view, struct commit *commit, const char *ids, bool is_boundary)
  55 {
  56         struct main_state *state = view->private;
  57         struct graph *graph = state->graph;
  58
  59         string_copy_rev(commit->id, ids);
  60
  61         /* FIXME: lazily check index state here instead of in main_open. */
  62         if ((state->add_changes_unstaged || state->add_changes_staged) && is_head_commit(commit->id)) {
  63                 main_add_changes(view, state, ids);
  64                 state->add_changes_unstaged = state->add_changes_staged = FALSE;
  65         }
  66
  67         if (state->with_graph)
  68                 graph->add_commit(graph, &commit->graph, commit->id, ids, is_boundary);
  69 }
  70
  71 static struct commit *
  72 main_add_commit(struct view *view, enum line_type type, struct commit *template,
  73                 const char *title, bool custom)
  74 {
  75         struct main_state *state = view->private;
  76         size_t titlelen;
  77         struct commit *commit;
  78         char buf[SIZEOF_STR / 2];
  79         struct line *line;
  80
  81         /* FIXME: More graceful handling of titles; append "..." to
  82          * shortened titles, etc. */
  83         string_expand(buf, sizeof(buf), title, 1);
  84         title = buf;
  85         titlelen = strlen(title);
  86
  87         line = add_line_alloc(view, &commit, type, titlelen, custom);
  88         if (!line)
  89                 return NULL;
  90
  91         *commit = *template;
  92         strncpy(commit->title, title, titlelen);
  93         memset(template, 0, sizeof(*template));
  94         state->reflogmsg[0] = 0;
  95
  96         view_column_info_update(view, line);
  97         return commit;
  98 }
  99
 100 static inline void
 101 main_flush_commit(struct view *view, struct commit *commit)
 102 {
 103         if (*commit->id)
 104                 main_add_commit(view, LINE_MAIN_COMMIT, commit, "", FALSE);
 105 }
 106
 107 static bool
 108 main_add_changes_commit(struct view *view, enum line_type type, const char *parent, const char *title)
 109 {
 110         char ids[SIZEOF_STR] = NULL_ID " ";
 111         struct main_state *state = view->private;
 112         struct graph *graph = state->graph;
 113         struct commit commit = {{0}};
 114         struct timeval now;
 115         struct timezone tz;
 116
 117         if (!parent)
 118                 return TRUE;
 119
 120         if (*parent)
 121                 string_copy_rev(ids + STRING_SIZE(NULL_ID " "), parent);
 122         else
 123                 ids[STRING_SIZE(NULL_ID)] = 0;
 124
 125         if (!gettimeofday(&now, &tz)) {
 126                 commit.time.tz = tz.tz_minuteswest * 60;
 127                 commit.time.sec = now.tv_sec - commit.time.tz;
 128         }
 129
 130         commit.author = &unknown_ident;
 131         main_register_commit(view, &commit, ids, FALSE);
 132         if (state->with_graph && *parent)
 133                 graph->render_parents(graph, &commit.graph);
 134
 135         if (!main_add_commit(view, type, &commit, title, TRUE))
 136                 return FALSE;
 137
 138         if (state->goto_line_type == type)
 139                 select_view_line(view, view->lines - 1);
 140
 141         return TRUE;
 142 }
 143
 144 static bool
 145 main_check_index(struct view *view, struct main_state *state)
 146 {
 147         struct index_diff diff;
 148
 149         if (!index_diff(&diff, FALSE, FALSE))
 150                 return FALSE;
 151
 152         if (!diff.unstaged) {
 153                 watch_apply(&view->watch, WATCH_INDEX_UNSTAGED_NO);
 154         } else {
 155                 watch_apply(&view->watch, WATCH_INDEX_UNSTAGED_YES);
 156                 state->add_changes_unstaged = TRUE;
 157         }
 158
 159         if (!diff.staged) {
 160                 watch_apply(&view->watch, WATCH_INDEX_STAGED_NO);
 161         } else {
 162                 watch_apply(&view->watch, WATCH_INDEX_STAGED_YES);
 163                 state->add_changes_staged = TRUE;
 164         }
 165
 166         return TRUE;
 167 }
 168
 169 static bool
 170 main_add_changes(struct view *view, struct main_state *state, const char *parent)
 171 {
 172         const char *staged_parent = parent;
 173         const char *unstaged_parent = NULL_ID;
 174
 175         if (!state->add_changes_staged) {
 176                 staged_parent = NULL;
 177                 unstaged_parent = parent;
 178         }
 179
 180         if (!state->add_changes_unstaged) {
 181                 unstaged_parent = NULL;
 182         }
 183
 184         return main_add_changes_commit(view, LINE_STAT_UNSTAGED, unstaged_parent, "Unstaged changes")
 185             && main_add_changes_commit(view, LINE_STAT_STAGED, staged_parent, "Staged changes");
 186 }
 187
 188 static bool
 189 main_check_argv(struct view *view, const char *argv[])
 190 {
 191         struct main_state *state = view->private;
 192         bool with_reflog = FALSE;
 193         int i;
 194
 195         for (i = 0; argv[i]; i++) {
 196                 const char *arg = argv[i];
 197                 struct rev_flags rev_flags = {0};
 198
 199                 if (!strcmp(arg, "--graph")) {
 200                         struct view_column *column = get_view_column(view, VIEW_COLUMN_COMMIT_TITLE);
 201
 202                         if (column) {
 203                                 column->opt.commit_title.graph = TRUE;
 204                                 if (opt_commit_order != COMMIT_ORDER_REVERSE)
 205                                         state->with_graph = TRUE;
 206                         }
 207                         argv[i] = "";
 208                         continue;
 209                 }
 210
 211                 if (!strcmp(arg, "--first-parent"))
 212                         state->first_parent = TRUE;
 213
 214                 if (!argv_parse_rev_flag(arg, &rev_flags))
 215                         continue;
 216
 217                 if (rev_flags.with_reflog)
 218                         with_reflog = TRUE;
 219                 if (!rev_flags.with_graph)
 220                         state->with_graph = FALSE;
 221                 arg += rev_flags.search_offset;
 222                 if (*arg && !*view->env->search)
 223                         string_ncopy(view->env->search, arg, strlen(arg));
 224         }
 225
 226         return with_reflog;
 227 }
 228
 229 static enum graph_display
 230 main_with_graph(struct view *view, struct view_column *column, enum open_flags flags)
 231 {
 232         return column && opt_commit_order != COMMIT_ORDER_REVERSE && !open_in_pager_mode(flags)
 233                ? column->opt.commit_title.graph : GRAPH_DISPLAY_NO;
 234 }
 235
 236 static bool
 237 main_open(struct view *view, enum open_flags flags)
 238 {
 239         struct view_column *commit_title_column = get_view_column(view, VIEW_COLUMN_COMMIT_TITLE);
 240         enum graph_display graph_display = main_with_graph(view, commit_title_column, flags);
 241         const char *pretty_custom_argv[] = {
 242                 GIT_MAIN_LOG_CUSTOM(encoding_arg, commit_order_arg_with_graph(graph_display),
 243                         "%(mainargs)", "%(cmdlineargs)", "%(revargs)", "%(fileargs)")
 244         };
 245         const char *pretty_raw_argv[] = {
 246                 GIT_MAIN_LOG_RAW(encoding_arg, commit_order_arg_with_graph(graph_display),
 247                         "%(mainargs)", "%(cmdlineargs)", "%(revargs)", "%(fileargs)")
 248         };
 249         struct main_state *state = view->private;
 250         const char **main_argv = pretty_custom_argv;
 251         enum watch_trigger changes_triggers = WATCH_NONE;
 252
 253         if (opt_show_changes && repo.is_inside_work_tree)
 254                 changes_triggers |= WATCH_INDEX;
 255
 256         state->with_graph = graph_display != GRAPH_DISPLAY_NO;
 257
 258         if (opt_rev_args && main_check_argv(view, opt_rev_args))
 259                 main_argv = pretty_raw_argv;
 260
 261         if (state->with_graph) {
 262                 state->graph = init_graph(commit_title_column->opt.commit_title.graph);
 263                 if (!state->graph)
 264                         return FALSE;
 265         }
 266
 267         if (open_in_pager_mode(flags)) {
 268                 changes_triggers = WATCH_NONE;
 269         }
 270
 271         /* This calls reset_view() so must be before adding changes commits. */
 272         if (!begin_update(view, NULL, main_argv, flags))
 273                 return FALSE;
 274
 275         /* Register watch before changes commits are added to record the
 276          * start. */
 277         if (view_can_refresh(view))
 278                 watch_register(&view->watch, WATCH_HEAD | WATCH_REFS | changes_triggers);
 279
 280         if (changes_triggers)
 281                 main_check_index(view, state);
 282
 283         return TRUE;
 284 }
 285
 286 void
 287 main_done(struct view *view)
 288 {
 289         struct main_state *state = view->private;
 290         int i;
 291
 292         for (i = 0; i < view->lines; i++) {
 293                 struct commit *commit = view->line[i].data;
 294
 295                 free(commit->graph.symbols);
 296         }
 297
 298         if (state->graph)
 299                 state->graph->done(state->graph);
 300
 301         for (i = 0; i < state->reflogs; i++)
 302                 free(state->reflog[i]);
 303         free(state->reflog);
 304 }
 305
 306 #define main_check_commit_refs(line)    !((line)->no_commit_refs)
 307 #define main_mark_no_commit_refs(line)  (((struct line *) (line))->no_commit_refs = 1)
 308
 309 static inline const struct ref *
 310 main_get_commit_refs(const struct line *line, struct commit *commit)
 311 {
 312         const struct ref *refs = NULL;
 313
 314         if (main_check_commit_refs(line) && !(refs = get_ref_list(commit->id)))
 315                 main_mark_no_commit_refs(line);
 316
 317         return refs;
 318 }
 319
 320 bool
 321 main_get_column_data(struct view *view, const struct line *line, struct view_column_data *column_data)
 322 {
 323         struct main_state *state = view->private;
 324         struct commit *commit = line->data;
 325
 326         column_data->author = commit->author;
 327         column_data->date = &commit->time;
 328         column_data->id = commit->id;
 329         if (state->reflogs)
 330                 column_data->reflog = state->reflog[line->lineno - 1];
 331
 332         column_data->commit_title = commit->title;
 333         if (state->with_graph) {
 334                 column_data->graph = state->graph;
 335                 column_data->graph_canvas = &commit->graph;
 336         }
 337
 338         column_data->refs = main_get_commit_refs(line, commit);
 339
 340         return TRUE;
 341 }
 342
 343 static bool
 344 main_add_reflog(struct view *view, struct main_state *state, char *reflog)
 345 {
 346         char *end = strchr(reflog, ' ');
 347         int id_width;
 348
 349         if (!end)
 350                 return FALSE;
 351         *end = 0;
 352
 353         if (!realloc_reflogs(&state->reflog, state->reflogs, 1)
 354             || !(reflog = strdup(reflog)))
 355                 return FALSE;
 356
 357         state->reflog[state->reflogs++] = reflog;
 358         id_width = strlen(reflog);
 359         if (state->reflog_width < id_width) {
 360                 struct view_column *column = get_view_column(view, VIEW_COLUMN_ID);
 361
 362                 state->reflog_width = id_width;
 363                 if (column && column->opt.id.display)
 364                         view->force_redraw = TRUE;
 365         }
 366
 367         return TRUE;
 368 }
 369
 370 /* Reads git log --pretty=raw output and parses it into the commit struct. */
 371 bool
 372 main_read(struct view *view, struct buffer *buf)
 373 {
 374         struct main_state *state = view->private;
 375         struct graph *graph = state->graph;
 376         enum line_type type;
 377         struct commit *commit = &state->current;
 378         char *line;
 379
 380         if (!buf) {
 381                 main_flush_commit(view, commit);
 382
 383                 if (failed_to_load_initial_view(view))
 384                         die("No revisions match the given arguments.");
 385                 if (view->lines > 0) {
 386                         struct commit *last = view->line[view->lines - 1].data;
 387
 388                         view->line[view->lines - 1].dirty = 1;
 389                         if (!last->author) {
 390                                 view->lines--;
 391                                 free(last);
 392                         }
 393                 }
 394
 395                 if (state->graph)
 396                         state->graph->done_rendering(graph);
 397                 return TRUE;
 398         }
 399
 400         line = buf->data;
 401         type = get_line_type(line);
 402         if (type == LINE_COMMIT) {
 403                 bool is_boundary;
 404                 char *author;
 405
 406                 state->in_header = TRUE;
 407                 line += STRING_SIZE("commit ");
 408                 is_boundary = *line == '-';
 409                 while (*line && !isalnum(*line))
 410                         line++;
 411
 412                 main_flush_commit(view, commit);
 413
 414                 author = io_memchr(buf, line, 0);
 415
 416                 if (state->first_parent) {
 417                         char *parent = strchr(line, ' ');
 418                         char *parent_end = parent ? strchr(parent + 1, ' ') : NULL;
 419
 420                         if (parent_end)
 421                                 *parent_end = 0;
 422                 }
 423
 424                 main_register_commit(view, &state->current, line, is_boundary);
 425
 426                 if (author) {
 427                         char *title = io_memchr(buf, author, 0);
 428
 429                         parse_author_line(author, &commit->author, &commit->time);
 430                         if (state->with_graph)
 431                                 graph->render_parents(graph, &commit->graph);
 432                         if (title)
 433                                 main_add_commit(view, LINE_MAIN_COMMIT, commit, title, FALSE);
 434                 }
 435
 436                 return TRUE;
 437         }
 438
 439         if (!*commit->id)
 440                 return TRUE;
 441
 442         /* Empty line separates the commit header from the log itself. */
 443         if (*line == '\0')
 444                 state->in_header = FALSE;
 445
 446         switch (type) {
 447         case LINE_PP_REFLOG:
 448                 if (!main_add_reflog(view, state, line + STRING_SIZE("Reflog: ")))
 449                         return FALSE;
 450                 break;
 451
 452         case LINE_PP_REFLOGMSG:
 453                 line += STRING_SIZE("Reflog message: ");
 454                 string_ncopy(state->reflogmsg, line, strlen(line));
 455                 break;
 456
 457         case LINE_PARENT:
 458                 if (state->with_graph)
 459                         graph->add_parent(graph, line + STRING_SIZE("parent "));
 460                 break;
 461
 462         case LINE_AUTHOR:
 463                 parse_author_line(line + STRING_SIZE("author "),
 464                                   &commit->author, &commit->time);
 465                 if (state->with_graph)
 466                         graph->render_parents(graph, &commit->graph);
 467                 break;
 468
 469         default:
 470                 /* Fill in the commit title if it has not already been set. */
 471                 if (*commit->title)
 472                         break;
 473
 474                 /* Skip lines in the commit header. */
 475                 if (state->in_header)
 476                         break;
 477
 478                 /* Require titles to start with a non-space character at the
 479                  * offset used by git log. */
 480                 if (strncmp(line, "    ", 4))
 481                         break;
 482                 line += 4;
 483                 /* Well, if the title starts with a whitespace character,
 484                  * try to be forgiving.  Otherwise we end up with no title. */
 485                 while (isspace(*line))
 486                         line++;
 487                 if (*line == '\0')
 488                         break;
 489                 if (*state->reflogmsg)
 490                         line = state->reflogmsg;
 491                 main_add_commit(view, LINE_MAIN_COMMIT, commit, line, FALSE);
 492         }
 493
 494         return TRUE;
 495 }
 496
 497 enum request
 498 main_request(struct view *view, enum request request, struct line *line)
 499 {
 500         enum open_flags flags = (view_is_displayed(view) && request != REQ_VIEW_DIFF)
 501                                 ? OPEN_SPLIT : OPEN_DEFAULT;
 502
 503         switch (request) {
 504         case REQ_NEXT:
 505         case REQ_PREVIOUS:
 506                 if (view_is_displayed(view) && display[0] != view)
 507                         return request;
 508                 /* Do not pass navigation requests to the branch view
 509                  * when the main view is maximized. (GH #38) */
 510                 return request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
 511
 512         case REQ_VIEW_DIFF:
 513         case REQ_ENTER:
 514                 if (view_is_displayed(view) && display[0] != view)
 515                         maximize_view(view, TRUE);
 516
 517                 if (line->type == LINE_STAT_UNSTAGED
 518                     || line->type == LINE_STAT_STAGED)
 519                         open_stage_view(view, NULL, line->type, flags);
 520                 else
 521                         open_diff_view(view, flags);
 522                 break;
 523
 524         case REQ_REFRESH:
 525                 load_refs(TRUE);
 526                 refresh_view(view);
 527                 break;
 528
 529         default:
 530                 return request;
 531         }
 532
 533         return REQ_NONE;
 534 }
 535
 536 /* Update the env from last ref to first using recursion. */
 537 static void
 538 main_update_env(struct view *view, const struct ref *ref)
 539 {
 540         if (ref->next)
 541                 main_update_env(view, ref->next);
 542         ref_update_env(view->env, ref, !ref->next);
 543 }
 544
 545 void
 546 main_select(struct view *view, struct line *line)
 547 {
 548         struct commit *commit = line->data;
 549
 550         if (line->type == LINE_STAT_STAGED || line->type == LINE_STAT_UNSTAGED) {
 551                 string_ncopy(view->ref, commit->title, strlen(commit->title));
 552                 status_stage_info(view->env->status, line->type, NULL);
 553         } else {
 554                 const struct ref *ref = main_get_commit_refs(line, commit);
 555
 556                 string_copy_rev(view->ref, commit->id);
 557                 if (ref)
 558                         main_update_env(view, ref);
 559         }
 560         string_copy_rev(view->env->commit, commit->id);
 561 }
 562
 563 static struct view_ops main_ops = {
 564         "commit",
 565         argv_env.head,
 566         VIEW_SEND_CHILD_ENTER | VIEW_FILE_FILTER | VIEW_LOG_LIKE | VIEW_REFRESH,
 567         sizeof(struct main_state),
 568         main_open,
 569         main_read,
 570         view_column_draw,
 571         main_request,
 572         view_column_grep,
 573         main_select,
 574         main_done,
 575         view_column_bit(AUTHOR) | view_column_bit(COMMIT_TITLE) |
 576                 view_column_bit(DATE) | view_column_bit(ID) |
 577                 view_column_bit(LINE_NUMBER),
 578         main_get_column_data,
 579 };
 580
 581 DEFINE_VIEW(main);
 582
 583 /* vim: set ts=8 sw=8 noexpandtab: */