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