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Commit | Line | Data |
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c12172d2 AS |
1 | #include "cache.h" |
2 | #include "commit.h" | |
427fc5b8 | 3 | #include "color.h" |
c12172d2 AS |
4 | #include "graph.h" |
5 | #include "diff.h" | |
6 | #include "revision.h" | |
7 | ||
064bfbde NS |
8 | /* Internal API */ |
9 | ||
10 | /* | |
11 | * Output the next line for a graph. | |
12 | * This formats the next graph line into the specified strbuf. It is not | |
13 | * terminated with a newline. | |
14 | * | |
15 | * Returns 1 if the line includes the current commit, and 0 otherwise. | |
16 | * graph_next_line() will return 1 exactly once for each time | |
17 | * graph_update() is called. | |
18 | */ | |
19 | static int graph_next_line(struct git_graph *graph, struct strbuf *sb); | |
20 | ||
21 | /* | |
22 | * Output a padding line in the graph. | |
23 | * This is similar to graph_next_line(). However, it is guaranteed to | |
24 | * never print the current commit line. Instead, if the commit line is | |
25 | * next, it will simply output a line of vertical padding, extending the | |
26 | * branch lines downwards, but leaving them otherwise unchanged. | |
27 | */ | |
28 | static void graph_padding_line(struct git_graph *graph, struct strbuf *sb); | |
29 | ||
30 | /* | |
31 | * Print a strbuf to stdout. If the graph is non-NULL, all lines but the | |
32 | * first will be prefixed with the graph output. | |
33 | * | |
34 | * If the strbuf ends with a newline, the output will end after this | |
35 | * newline. A new graph line will not be printed after the final newline. | |
36 | * If the strbuf is empty, no output will be printed. | |
37 | * | |
3ea3c215 | 38 | * Since the first line will not include the graph output, the caller is |
064bfbde NS |
39 | * responsible for printing this line's graph (perhaps via |
40 | * graph_show_commit() or graph_show_oneline()) before calling | |
41 | * graph_show_strbuf(). | |
42 | */ | |
43 | static void graph_show_strbuf(struct git_graph *graph, struct strbuf const *sb); | |
44 | ||
c12172d2 AS |
45 | /* |
46 | * TODO: | |
c12172d2 AS |
47 | * - Limit the number of columns, similar to the way gitk does. |
48 | * If we reach more than a specified number of columns, omit | |
49 | * sections of some columns. | |
c12172d2 AS |
50 | */ |
51 | ||
52 | struct column { | |
53 | /* | |
54 | * The parent commit of this column. | |
55 | */ | |
56 | struct commit *commit; | |
57 | /* | |
427fc5b8 AC |
58 | * The color to (optionally) print this column in. This is an |
59 | * index into column_colors. | |
c12172d2 | 60 | */ |
427fc5b8 | 61 | unsigned short color; |
c12172d2 AS |
62 | }; |
63 | ||
64 | enum graph_state { | |
65 | GRAPH_PADDING, | |
66 | GRAPH_SKIP, | |
67 | GRAPH_PRE_COMMIT, | |
68 | GRAPH_COMMIT, | |
69 | GRAPH_POST_MERGE, | |
70 | GRAPH_COLLAPSING | |
71 | }; | |
72 | ||
427fc5b8 AC |
73 | /* |
74 | * The list of available column colors. | |
75 | */ | |
76 | static char column_colors[][COLOR_MAXLEN] = { | |
77 | GIT_COLOR_RED, | |
78 | GIT_COLOR_GREEN, | |
79 | GIT_COLOR_YELLOW, | |
80 | GIT_COLOR_BLUE, | |
81 | GIT_COLOR_MAGENTA, | |
82 | GIT_COLOR_CYAN, | |
758df17a ML |
83 | GIT_COLOR_BOLD_RED, |
84 | GIT_COLOR_BOLD_GREEN, | |
85 | GIT_COLOR_BOLD_YELLOW, | |
86 | GIT_COLOR_BOLD_BLUE, | |
87 | GIT_COLOR_BOLD_MAGENTA, | |
88 | GIT_COLOR_BOLD_CYAN, | |
427fc5b8 AC |
89 | }; |
90 | ||
91 | #define COLUMN_COLORS_MAX (ARRAY_SIZE(column_colors)) | |
92 | ||
93 | static const char *column_get_color_code(const struct column *c) | |
94 | { | |
95 | return column_colors[c->color]; | |
96 | } | |
97 | ||
98 | static void strbuf_write_column(struct strbuf *sb, const struct column *c, | |
99 | char col_char) | |
100 | { | |
101 | if (c->color < COLUMN_COLORS_MAX) | |
102 | strbuf_addstr(sb, column_get_color_code(c)); | |
103 | strbuf_addch(sb, col_char); | |
104 | if (c->color < COLUMN_COLORS_MAX) | |
105 | strbuf_addstr(sb, GIT_COLOR_RESET); | |
106 | } | |
107 | ||
c12172d2 AS |
108 | struct git_graph { |
109 | /* | |
110 | * The commit currently being processed | |
111 | */ | |
112 | struct commit *commit; | |
7528f27d AS |
113 | /* The rev-info used for the current traversal */ |
114 | struct rev_info *revs; | |
c12172d2 | 115 | /* |
37a75abc AS |
116 | * The number of interesting parents that this commit has. |
117 | * | |
118 | * Note that this is not the same as the actual number of parents. | |
119 | * This count excludes parents that won't be printed in the graph | |
120 | * output, as determined by graph_is_interesting(). | |
c12172d2 AS |
121 | */ |
122 | int num_parents; | |
0724cb86 AS |
123 | /* |
124 | * The width of the graph output for this commit. | |
125 | * All rows for this commit are padded to this width, so that | |
126 | * messages printed after the graph output are aligned. | |
127 | */ | |
128 | int width; | |
c12172d2 AS |
129 | /* |
130 | * The next expansion row to print | |
131 | * when state is GRAPH_PRE_COMMIT | |
132 | */ | |
133 | int expansion_row; | |
134 | /* | |
135 | * The current output state. | |
136 | * This tells us what kind of line graph_next_line() should output. | |
137 | */ | |
138 | enum graph_state state; | |
3395908e AS |
139 | /* |
140 | * The output state for the previous line of output. | |
141 | * This is primarily used to determine how the first merge line | |
142 | * should appear, based on the last line of the previous commit. | |
143 | */ | |
144 | enum graph_state prev_state; | |
145 | /* | |
146 | * The index of the column that refers to this commit. | |
147 | * | |
148 | * If none of the incoming columns refer to this commit, | |
149 | * this will be equal to num_columns. | |
150 | */ | |
151 | int commit_index; | |
152 | /* | |
153 | * The commit_index for the previously displayed commit. | |
154 | * | |
155 | * This is used to determine how the first line of a merge | |
156 | * graph output should appear, based on the last line of the | |
157 | * previous commit. | |
158 | */ | |
159 | int prev_commit_index; | |
c12172d2 AS |
160 | /* |
161 | * The maximum number of columns that can be stored in the columns | |
162 | * and new_columns arrays. This is also half the number of entries | |
163 | * that can be stored in the mapping and new_mapping arrays. | |
164 | */ | |
165 | int column_capacity; | |
166 | /* | |
167 | * The number of columns (also called "branch lines" in some places) | |
168 | */ | |
169 | int num_columns; | |
170 | /* | |
171 | * The number of columns in the new_columns array | |
172 | */ | |
173 | int num_new_columns; | |
174 | /* | |
175 | * The number of entries in the mapping array | |
176 | */ | |
177 | int mapping_size; | |
178 | /* | |
179 | * The column state before we output the current commit. | |
180 | */ | |
181 | struct column *columns; | |
182 | /* | |
183 | * The new column state after we output the current commit. | |
184 | * Only valid when state is GRAPH_COLLAPSING. | |
185 | */ | |
186 | struct column *new_columns; | |
187 | /* | |
188 | * An array that tracks the current state of each | |
189 | * character in the output line during state GRAPH_COLLAPSING. | |
190 | * Each entry is -1 if this character is empty, or a non-negative | |
191 | * integer if the character contains a branch line. The value of | |
192 | * the integer indicates the target position for this branch line. | |
193 | * (I.e., this array maps the current column positions to their | |
194 | * desired positions.) | |
195 | * | |
196 | * The maximum capacity of this array is always | |
197 | * sizeof(int) * 2 * column_capacity. | |
198 | */ | |
199 | int *mapping; | |
200 | /* | |
201 | * A temporary array for computing the next mapping state | |
202 | * while we are outputting a mapping line. This is stored as part | |
203 | * of the git_graph simply so we don't have to allocate a new | |
204 | * temporary array each time we have to output a collapsing line. | |
205 | */ | |
206 | int *new_mapping; | |
427fc5b8 AC |
207 | /* |
208 | * The current default column color being used. This is | |
209 | * stored as an index into the array column_colors. | |
210 | */ | |
211 | unsigned short default_column_color; | |
c12172d2 AS |
212 | }; |
213 | ||
b5a4de9d BY |
214 | static struct strbuf *diff_output_prefix_callback(struct diff_options *opt, void *data) |
215 | { | |
216 | struct git_graph *graph = data; | |
217 | static struct strbuf msgbuf = STRBUF_INIT; | |
218 | ||
219 | assert(graph); | |
220 | ||
221 | strbuf_reset(&msgbuf); | |
222 | graph_padding_line(graph, &msgbuf); | |
223 | return &msgbuf; | |
224 | } | |
225 | ||
7528f27d | 226 | struct git_graph *graph_init(struct rev_info *opt) |
c12172d2 AS |
227 | { |
228 | struct git_graph *graph = xmalloc(sizeof(struct git_graph)); | |
229 | graph->commit = NULL; | |
7528f27d | 230 | graph->revs = opt; |
c12172d2 AS |
231 | graph->num_parents = 0; |
232 | graph->expansion_row = 0; | |
233 | graph->state = GRAPH_PADDING; | |
3395908e AS |
234 | graph->prev_state = GRAPH_PADDING; |
235 | graph->commit_index = 0; | |
236 | graph->prev_commit_index = 0; | |
c12172d2 AS |
237 | graph->num_columns = 0; |
238 | graph->num_new_columns = 0; | |
239 | graph->mapping_size = 0; | |
91e50b2c AS |
240 | /* |
241 | * Start the column color at the maximum value, since we'll | |
242 | * always increment it for the first commit we output. | |
243 | * This way we start at 0 for the first commit. | |
244 | */ | |
245 | graph->default_column_color = COLUMN_COLORS_MAX - 1; | |
c12172d2 AS |
246 | |
247 | /* | |
248 | * Allocate a reasonably large default number of columns | |
249 | * We'll automatically grow columns later if we need more room. | |
250 | */ | |
251 | graph->column_capacity = 30; | |
252 | graph->columns = xmalloc(sizeof(struct column) * | |
253 | graph->column_capacity); | |
254 | graph->new_columns = xmalloc(sizeof(struct column) * | |
255 | graph->column_capacity); | |
256 | graph->mapping = xmalloc(sizeof(int) * 2 * graph->column_capacity); | |
257 | graph->new_mapping = xmalloc(sizeof(int) * 2 * graph->column_capacity); | |
258 | ||
b5a4de9d BY |
259 | /* |
260 | * The diff output prefix callback, with this we can make | |
261 | * all the diff output to align with the graph lines. | |
262 | */ | |
263 | opt->diffopt.output_prefix = diff_output_prefix_callback; | |
264 | opt->diffopt.output_prefix_data = graph; | |
265 | ||
c12172d2 AS |
266 | return graph; |
267 | } | |
268 | ||
3395908e AS |
269 | static void graph_update_state(struct git_graph *graph, enum graph_state s) |
270 | { | |
271 | graph->prev_state = graph->state; | |
272 | graph->state = s; | |
273 | } | |
274 | ||
c12172d2 AS |
275 | static void graph_ensure_capacity(struct git_graph *graph, int num_columns) |
276 | { | |
277 | if (graph->column_capacity >= num_columns) | |
278 | return; | |
279 | ||
280 | do { | |
281 | graph->column_capacity *= 2; | |
282 | } while (graph->column_capacity < num_columns); | |
283 | ||
284 | graph->columns = xrealloc(graph->columns, | |
285 | sizeof(struct column) * | |
286 | graph->column_capacity); | |
287 | graph->new_columns = xrealloc(graph->new_columns, | |
288 | sizeof(struct column) * | |
289 | graph->column_capacity); | |
290 | graph->mapping = xrealloc(graph->mapping, | |
291 | sizeof(int) * 2 * graph->column_capacity); | |
292 | graph->new_mapping = xrealloc(graph->new_mapping, | |
293 | sizeof(int) * 2 * graph->column_capacity); | |
294 | } | |
295 | ||
37a75abc AS |
296 | /* |
297 | * Returns 1 if the commit will be printed in the graph output, | |
298 | * and 0 otherwise. | |
299 | */ | |
3c68d67b | 300 | static int graph_is_interesting(struct git_graph *graph, struct commit *commit) |
37a75abc | 301 | { |
3c68d67b AS |
302 | /* |
303 | * If revs->boundary is set, commits whose children have | |
304 | * been shown are always interesting, even if they have the | |
305 | * UNINTERESTING or TREESAME flags set. | |
3c68d67b AS |
306 | */ |
307 | if (graph->revs && graph->revs->boundary) { | |
4603ec0f | 308 | if (commit->object.flags & CHILD_SHOWN) |
3c68d67b AS |
309 | return 1; |
310 | } | |
311 | ||
37a75abc | 312 | /* |
beb5af43 AS |
313 | * Otherwise, use get_commit_action() to see if this commit is |
314 | * interesting | |
37a75abc | 315 | */ |
beb5af43 | 316 | return get_commit_action(graph->revs, commit) == commit_show; |
37a75abc AS |
317 | } |
318 | ||
a0ebe573 AS |
319 | static struct commit_list *next_interesting_parent(struct git_graph *graph, |
320 | struct commit_list *orig) | |
321 | { | |
322 | struct commit_list *list; | |
323 | ||
324 | /* | |
325 | * If revs->first_parent_only is set, only the first | |
326 | * parent is interesting. None of the others are. | |
327 | */ | |
328 | if (graph->revs->first_parent_only) | |
329 | return NULL; | |
330 | ||
331 | /* | |
332 | * Return the next interesting commit after orig | |
333 | */ | |
334 | for (list = orig->next; list; list = list->next) { | |
335 | if (graph_is_interesting(graph, list->item)) | |
336 | return list; | |
337 | } | |
338 | ||
339 | return NULL; | |
340 | } | |
341 | ||
342 | static struct commit_list *first_interesting_parent(struct git_graph *graph) | |
343 | { | |
344 | struct commit_list *parents = graph->commit->parents; | |
345 | ||
346 | /* | |
347 | * If this commit has no parents, ignore it | |
348 | */ | |
349 | if (!parents) | |
350 | return NULL; | |
351 | ||
352 | /* | |
353 | * If the first parent is interesting, return it | |
354 | */ | |
355 | if (graph_is_interesting(graph, parents->item)) | |
356 | return parents; | |
357 | ||
358 | /* | |
359 | * Otherwise, call next_interesting_parent() to get | |
360 | * the next interesting parent | |
361 | */ | |
362 | return next_interesting_parent(graph, parents); | |
363 | } | |
364 | ||
427fc5b8 AC |
365 | static unsigned short graph_get_current_column_color(const struct git_graph *graph) |
366 | { | |
367 | if (!DIFF_OPT_TST(&graph->revs->diffopt, COLOR_DIFF)) | |
368 | return COLUMN_COLORS_MAX; | |
369 | return graph->default_column_color; | |
370 | } | |
371 | ||
372 | /* | |
373 | * Update the graph's default column color. | |
374 | */ | |
375 | static void graph_increment_column_color(struct git_graph *graph) | |
376 | { | |
377 | graph->default_column_color = (graph->default_column_color + 1) % | |
378 | COLUMN_COLORS_MAX; | |
379 | } | |
380 | ||
381 | static unsigned short graph_find_commit_color(const struct git_graph *graph, | |
382 | const struct commit *commit) | |
383 | { | |
384 | int i; | |
385 | for (i = 0; i < graph->num_columns; i++) { | |
386 | if (graph->columns[i].commit == commit) | |
387 | return graph->columns[i].color; | |
388 | } | |
389 | return graph_get_current_column_color(graph); | |
390 | } | |
391 | ||
c12172d2 AS |
392 | static void graph_insert_into_new_columns(struct git_graph *graph, |
393 | struct commit *commit, | |
394 | int *mapping_index) | |
395 | { | |
396 | int i; | |
397 | ||
c12172d2 AS |
398 | /* |
399 | * If the commit is already in the new_columns list, we don't need to | |
400 | * add it. Just update the mapping correctly. | |
401 | */ | |
402 | for (i = 0; i < graph->num_new_columns; i++) { | |
403 | if (graph->new_columns[i].commit == commit) { | |
404 | graph->mapping[*mapping_index] = i; | |
405 | *mapping_index += 2; | |
406 | return; | |
407 | } | |
408 | } | |
409 | ||
410 | /* | |
411 | * This commit isn't already in new_columns. Add it. | |
412 | */ | |
413 | graph->new_columns[graph->num_new_columns].commit = commit; | |
427fc5b8 | 414 | graph->new_columns[graph->num_new_columns].color = graph_find_commit_color(graph, commit); |
c12172d2 AS |
415 | graph->mapping[*mapping_index] = graph->num_new_columns; |
416 | *mapping_index += 2; | |
417 | graph->num_new_columns++; | |
418 | } | |
419 | ||
0724cb86 AS |
420 | static void graph_update_width(struct git_graph *graph, |
421 | int is_commit_in_existing_columns) | |
422 | { | |
423 | /* | |
424 | * Compute the width needed to display the graph for this commit. | |
425 | * This is the maximum width needed for any row. All other rows | |
426 | * will be padded to this width. | |
427 | * | |
428 | * Compute the number of columns in the widest row: | |
429 | * Count each existing column (graph->num_columns), and each new | |
430 | * column added by this commit. | |
431 | */ | |
432 | int max_cols = graph->num_columns + graph->num_parents; | |
433 | ||
434 | /* | |
37a75abc AS |
435 | * Even if the current commit has no parents to be printed, it |
436 | * still takes up a column for itself. | |
0724cb86 AS |
437 | */ |
438 | if (graph->num_parents < 1) | |
439 | max_cols++; | |
440 | ||
441 | /* | |
442 | * We added a column for the the current commit as part of | |
443 | * graph->num_parents. If the current commit was already in | |
444 | * graph->columns, then we have double counted it. | |
445 | */ | |
446 | if (is_commit_in_existing_columns) | |
447 | max_cols--; | |
448 | ||
449 | /* | |
450 | * Each column takes up 2 spaces | |
451 | */ | |
452 | graph->width = max_cols * 2; | |
453 | } | |
454 | ||
c12172d2 AS |
455 | static void graph_update_columns(struct git_graph *graph) |
456 | { | |
457 | struct commit_list *parent; | |
458 | struct column *tmp_columns; | |
459 | int max_new_columns; | |
460 | int mapping_idx; | |
0724cb86 | 461 | int i, seen_this, is_commit_in_columns; |
c12172d2 AS |
462 | |
463 | /* | |
464 | * Swap graph->columns with graph->new_columns | |
465 | * graph->columns contains the state for the previous commit, | |
466 | * and new_columns now contains the state for our commit. | |
467 | * | |
468 | * We'll re-use the old columns array as storage to compute the new | |
469 | * columns list for the commit after this one. | |
470 | */ | |
471 | tmp_columns = graph->columns; | |
472 | graph->columns = graph->new_columns; | |
473 | graph->num_columns = graph->num_new_columns; | |
474 | ||
475 | graph->new_columns = tmp_columns; | |
476 | graph->num_new_columns = 0; | |
477 | ||
478 | /* | |
479 | * Now update new_columns and mapping with the information for the | |
480 | * commit after this one. | |
481 | * | |
482 | * First, make sure we have enough room. At most, there will | |
483 | * be graph->num_columns + graph->num_parents columns for the next | |
484 | * commit. | |
485 | */ | |
486 | max_new_columns = graph->num_columns + graph->num_parents; | |
487 | graph_ensure_capacity(graph, max_new_columns); | |
488 | ||
489 | /* | |
490 | * Clear out graph->mapping | |
491 | */ | |
492 | graph->mapping_size = 2 * max_new_columns; | |
493 | for (i = 0; i < graph->mapping_size; i++) | |
494 | graph->mapping[i] = -1; | |
495 | ||
496 | /* | |
497 | * Populate graph->new_columns and graph->mapping | |
498 | * | |
499 | * Some of the parents of this commit may already be in | |
500 | * graph->columns. If so, graph->new_columns should only contain a | |
501 | * single entry for each such commit. graph->mapping should | |
502 | * contain information about where each current branch line is | |
503 | * supposed to end up after the collapsing is performed. | |
504 | */ | |
505 | seen_this = 0; | |
506 | mapping_idx = 0; | |
0724cb86 | 507 | is_commit_in_columns = 1; |
c12172d2 AS |
508 | for (i = 0; i <= graph->num_columns; i++) { |
509 | struct commit *col_commit; | |
510 | if (i == graph->num_columns) { | |
511 | if (seen_this) | |
512 | break; | |
0724cb86 | 513 | is_commit_in_columns = 0; |
c12172d2 AS |
514 | col_commit = graph->commit; |
515 | } else { | |
516 | col_commit = graph->columns[i].commit; | |
517 | } | |
518 | ||
519 | if (col_commit == graph->commit) { | |
37a75abc | 520 | int old_mapping_idx = mapping_idx; |
c12172d2 | 521 | seen_this = 1; |
3395908e | 522 | graph->commit_index = i; |
a0ebe573 | 523 | for (parent = first_interesting_parent(graph); |
c12172d2 | 524 | parent; |
a0ebe573 | 525 | parent = next_interesting_parent(graph, parent)) { |
427fc5b8 | 526 | /* |
91e50b2c AS |
527 | * If this is a merge, or the start of a new |
528 | * childless column, increment the current | |
427fc5b8 AC |
529 | * color. |
530 | */ | |
91e50b2c AS |
531 | if (graph->num_parents > 1 || |
532 | !is_commit_in_columns) { | |
427fc5b8 | 533 | graph_increment_column_color(graph); |
91e50b2c | 534 | } |
c12172d2 AS |
535 | graph_insert_into_new_columns(graph, |
536 | parent->item, | |
537 | &mapping_idx); | |
538 | } | |
37a75abc AS |
539 | /* |
540 | * We always need to increment mapping_idx by at | |
541 | * least 2, even if it has no interesting parents. | |
542 | * The current commit always takes up at least 2 | |
543 | * spaces. | |
544 | */ | |
545 | if (mapping_idx == old_mapping_idx) | |
546 | mapping_idx += 2; | |
c12172d2 AS |
547 | } else { |
548 | graph_insert_into_new_columns(graph, col_commit, | |
549 | &mapping_idx); | |
550 | } | |
551 | } | |
552 | ||
553 | /* | |
554 | * Shrink mapping_size to be the minimum necessary | |
555 | */ | |
556 | while (graph->mapping_size > 1 && | |
557 | graph->mapping[graph->mapping_size - 1] < 0) | |
558 | graph->mapping_size--; | |
0724cb86 AS |
559 | |
560 | /* | |
561 | * Compute graph->width for this commit | |
562 | */ | |
563 | graph_update_width(graph, is_commit_in_columns); | |
c12172d2 AS |
564 | } |
565 | ||
566 | void graph_update(struct git_graph *graph, struct commit *commit) | |
567 | { | |
568 | struct commit_list *parent; | |
569 | ||
570 | /* | |
571 | * Set the new commit | |
572 | */ | |
573 | graph->commit = commit; | |
574 | ||
575 | /* | |
37a75abc | 576 | * Count how many interesting parents this commit has |
c12172d2 AS |
577 | */ |
578 | graph->num_parents = 0; | |
a0ebe573 AS |
579 | for (parent = first_interesting_parent(graph); |
580 | parent; | |
581 | parent = next_interesting_parent(graph, parent)) | |
582 | { | |
583 | graph->num_parents++; | |
37a75abc | 584 | } |
c12172d2 | 585 | |
3395908e AS |
586 | /* |
587 | * Store the old commit_index in prev_commit_index. | |
588 | * graph_update_columns() will update graph->commit_index for this | |
589 | * commit. | |
590 | */ | |
591 | graph->prev_commit_index = graph->commit_index; | |
592 | ||
c12172d2 AS |
593 | /* |
594 | * Call graph_update_columns() to update | |
595 | * columns, new_columns, and mapping. | |
596 | */ | |
597 | graph_update_columns(graph); | |
598 | ||
599 | graph->expansion_row = 0; | |
600 | ||
601 | /* | |
602 | * Update graph->state. | |
3395908e AS |
603 | * Note that we don't call graph_update_state() here, since |
604 | * we don't want to update graph->prev_state. No line for | |
605 | * graph->state was ever printed. | |
c12172d2 AS |
606 | * |
607 | * If the previous commit didn't get to the GRAPH_PADDING state, | |
608 | * it never finished its output. Goto GRAPH_SKIP, to print out | |
609 | * a line to indicate that portion of the graph is missing. | |
610 | * | |
f1979d6b AS |
611 | * If there are 3 or more parents, we may need to print extra rows |
612 | * before the commit, to expand the branch lines around it and make | |
613 | * room for it. We need to do this only if there is a branch row | |
614 | * (or more) to the right of this commit. | |
c12172d2 AS |
615 | * |
616 | * If there are less than 3 parents, we can immediately print the | |
617 | * commit line. | |
618 | */ | |
619 | if (graph->state != GRAPH_PADDING) | |
620 | graph->state = GRAPH_SKIP; | |
f1979d6b AS |
621 | else if (graph->num_parents >= 3 && |
622 | graph->commit_index < (graph->num_columns - 1)) | |
c12172d2 AS |
623 | graph->state = GRAPH_PRE_COMMIT; |
624 | else | |
625 | graph->state = GRAPH_COMMIT; | |
626 | } | |
627 | ||
628 | static int graph_is_mapping_correct(struct git_graph *graph) | |
629 | { | |
630 | int i; | |
631 | ||
632 | /* | |
633 | * The mapping is up to date if each entry is at its target, | |
634 | * or is 1 greater than its target. | |
635 | * (If it is 1 greater than the target, '/' will be printed, so it | |
636 | * will look correct on the next row.) | |
637 | */ | |
638 | for (i = 0; i < graph->mapping_size; i++) { | |
639 | int target = graph->mapping[i]; | |
640 | if (target < 0) | |
641 | continue; | |
642 | if (target == (i / 2)) | |
643 | continue; | |
644 | return 0; | |
645 | } | |
646 | ||
647 | return 1; | |
648 | } | |
649 | ||
427fc5b8 AC |
650 | static void graph_pad_horizontally(struct git_graph *graph, struct strbuf *sb, |
651 | int chars_written) | |
c12172d2 AS |
652 | { |
653 | /* | |
654 | * Add additional spaces to the end of the strbuf, so that all | |
655 | * lines for a particular commit have the same width. | |
656 | * | |
657 | * This way, fields printed to the right of the graph will remain | |
658 | * aligned for the entire commit. | |
c12172d2 | 659 | */ |
0724cb86 | 660 | int extra; |
427fc5b8 | 661 | if (chars_written >= graph->width) |
c12172d2 AS |
662 | return; |
663 | ||
427fc5b8 | 664 | extra = graph->width - chars_written; |
c12172d2 AS |
665 | strbuf_addf(sb, "%*s", (int) extra, ""); |
666 | } | |
667 | ||
668 | static void graph_output_padding_line(struct git_graph *graph, | |
669 | struct strbuf *sb) | |
670 | { | |
671 | int i; | |
672 | ||
673 | /* | |
674 | * We could conceivable be called with a NULL commit | |
675 | * if our caller has a bug, and invokes graph_next_line() | |
676 | * immediately after graph_init(), without first calling | |
677 | * graph_update(). Return without outputting anything in this | |
678 | * case. | |
679 | */ | |
680 | if (!graph->commit) | |
681 | return; | |
682 | ||
683 | /* | |
684 | * Output a padding row, that leaves all branch lines unchanged | |
685 | */ | |
686 | for (i = 0; i < graph->num_new_columns; i++) { | |
427fc5b8 AC |
687 | strbuf_write_column(sb, &graph->new_columns[i], '|'); |
688 | strbuf_addch(sb, ' '); | |
c12172d2 AS |
689 | } |
690 | ||
427fc5b8 | 691 | graph_pad_horizontally(graph, sb, graph->num_new_columns * 2); |
c12172d2 AS |
692 | } |
693 | ||
694 | static void graph_output_skip_line(struct git_graph *graph, struct strbuf *sb) | |
695 | { | |
696 | /* | |
697 | * Output an ellipsis to indicate that a portion | |
698 | * of the graph is missing. | |
699 | */ | |
700 | strbuf_addstr(sb, "..."); | |
427fc5b8 | 701 | graph_pad_horizontally(graph, sb, 3); |
c12172d2 | 702 | |
f1979d6b AS |
703 | if (graph->num_parents >= 3 && |
704 | graph->commit_index < (graph->num_columns - 1)) | |
3395908e | 705 | graph_update_state(graph, GRAPH_PRE_COMMIT); |
c12172d2 | 706 | else |
3395908e | 707 | graph_update_state(graph, GRAPH_COMMIT); |
c12172d2 AS |
708 | } |
709 | ||
710 | static void graph_output_pre_commit_line(struct git_graph *graph, | |
711 | struct strbuf *sb) | |
712 | { | |
713 | int num_expansion_rows; | |
714 | int i, seen_this; | |
427fc5b8 | 715 | int chars_written; |
c12172d2 AS |
716 | |
717 | /* | |
718 | * This function formats a row that increases the space around a commit | |
719 | * with multiple parents, to make room for it. It should only be | |
720 | * called when there are 3 or more parents. | |
721 | * | |
722 | * We need 2 extra rows for every parent over 2. | |
723 | */ | |
724 | assert(graph->num_parents >= 3); | |
725 | num_expansion_rows = (graph->num_parents - 2) * 2; | |
726 | ||
727 | /* | |
728 | * graph->expansion_row tracks the current expansion row we are on. | |
729 | * It should be in the range [0, num_expansion_rows - 1] | |
730 | */ | |
731 | assert(0 <= graph->expansion_row && | |
732 | graph->expansion_row < num_expansion_rows); | |
733 | ||
734 | /* | |
735 | * Output the row | |
736 | */ | |
737 | seen_this = 0; | |
427fc5b8 | 738 | chars_written = 0; |
c12172d2 AS |
739 | for (i = 0; i < graph->num_columns; i++) { |
740 | struct column *col = &graph->columns[i]; | |
741 | if (col->commit == graph->commit) { | |
742 | seen_this = 1; | |
427fc5b8 | 743 | strbuf_write_column(sb, col, '|'); |
36a31fea AC |
744 | strbuf_addf(sb, "%*s", graph->expansion_row, ""); |
745 | chars_written += 1 + graph->expansion_row; | |
3395908e AS |
746 | } else if (seen_this && (graph->expansion_row == 0)) { |
747 | /* | |
748 | * This is the first line of the pre-commit output. | |
749 | * If the previous commit was a merge commit and | |
750 | * ended in the GRAPH_POST_MERGE state, all branch | |
751 | * lines after graph->prev_commit_index were | |
752 | * printed as "\" on the previous line. Continue | |
753 | * to print them as "\" on this line. Otherwise, | |
754 | * print the branch lines as "|". | |
755 | */ | |
756 | if (graph->prev_state == GRAPH_POST_MERGE && | |
757 | graph->prev_commit_index < i) | |
427fc5b8 | 758 | strbuf_write_column(sb, col, '\\'); |
3395908e | 759 | else |
427fc5b8 AC |
760 | strbuf_write_column(sb, col, '|'); |
761 | chars_written++; | |
3395908e | 762 | } else if (seen_this && (graph->expansion_row > 0)) { |
427fc5b8 AC |
763 | strbuf_write_column(sb, col, '\\'); |
764 | chars_written++; | |
c12172d2 | 765 | } else { |
427fc5b8 AC |
766 | strbuf_write_column(sb, col, '|'); |
767 | chars_written++; | |
c12172d2 | 768 | } |
427fc5b8 AC |
769 | strbuf_addch(sb, ' '); |
770 | chars_written++; | |
c12172d2 AS |
771 | } |
772 | ||
427fc5b8 | 773 | graph_pad_horizontally(graph, sb, chars_written); |
c12172d2 AS |
774 | |
775 | /* | |
776 | * Increment graph->expansion_row, | |
777 | * and move to state GRAPH_COMMIT if necessary | |
778 | */ | |
779 | graph->expansion_row++; | |
780 | if (graph->expansion_row >= num_expansion_rows) | |
3395908e | 781 | graph_update_state(graph, GRAPH_COMMIT); |
c12172d2 AS |
782 | } |
783 | ||
3c68d67b AS |
784 | static void graph_output_commit_char(struct git_graph *graph, struct strbuf *sb) |
785 | { | |
786 | /* | |
787 | * For boundary commits, print 'o' | |
788 | * (We should only see boundary commits when revs->boundary is set.) | |
789 | */ | |
790 | if (graph->commit->object.flags & BOUNDARY) { | |
791 | assert(graph->revs->boundary); | |
792 | strbuf_addch(sb, 'o'); | |
793 | return; | |
794 | } | |
795 | ||
796 | /* | |
797 | * If revs->left_right is set, print '<' for commits that | |
798 | * come from the left side, and '>' for commits from the right | |
799 | * side. | |
800 | */ | |
801 | if (graph->revs && graph->revs->left_right) { | |
802 | if (graph->commit->object.flags & SYMMETRIC_LEFT) | |
803 | strbuf_addch(sb, '<'); | |
804 | else | |
805 | strbuf_addch(sb, '>'); | |
806 | return; | |
807 | } | |
808 | ||
3c68d67b AS |
809 | /* |
810 | * Print '*' in all other cases | |
811 | */ | |
812 | strbuf_addch(sb, '*'); | |
813 | } | |
814 | ||
427fc5b8 AC |
815 | /* |
816 | * Draw an octopus merge and return the number of characters written. | |
817 | */ | |
818 | static int graph_draw_octopus_merge(struct git_graph *graph, | |
819 | struct strbuf *sb) | |
820 | { | |
821 | /* | |
822 | * Here dashless_commits represents the number of parents | |
823 | * which don't need to have dashes (because their edges fit | |
824 | * neatly under the commit). | |
825 | */ | |
826 | const int dashless_commits = 2; | |
827 | int col_num, i; | |
828 | int num_dashes = | |
829 | ((graph->num_parents - dashless_commits) * 2) - 1; | |
830 | for (i = 0; i < num_dashes; i++) { | |
831 | col_num = (i / 2) + dashless_commits; | |
832 | strbuf_write_column(sb, &graph->new_columns[col_num], '-'); | |
833 | } | |
834 | col_num = (i / 2) + dashless_commits; | |
835 | strbuf_write_column(sb, &graph->new_columns[col_num], '.'); | |
836 | return num_dashes + 1; | |
837 | } | |
838 | ||
064bfbde | 839 | static void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb) |
c12172d2 AS |
840 | { |
841 | int seen_this = 0; | |
427fc5b8 | 842 | int i, chars_written; |
c12172d2 AS |
843 | |
844 | /* | |
845 | * Output the row containing this commit | |
846 | * Iterate up to and including graph->num_columns, | |
847 | * since the current commit may not be in any of the existing | |
848 | * columns. (This happens when the current commit doesn't have any | |
849 | * children that we have already processed.) | |
850 | */ | |
851 | seen_this = 0; | |
427fc5b8 | 852 | chars_written = 0; |
c12172d2 | 853 | for (i = 0; i <= graph->num_columns; i++) { |
427fc5b8 | 854 | struct column *col = &graph->columns[i]; |
c12172d2 AS |
855 | struct commit *col_commit; |
856 | if (i == graph->num_columns) { | |
857 | if (seen_this) | |
858 | break; | |
859 | col_commit = graph->commit; | |
860 | } else { | |
861 | col_commit = graph->columns[i].commit; | |
862 | } | |
863 | ||
864 | if (col_commit == graph->commit) { | |
865 | seen_this = 1; | |
3c68d67b | 866 | graph_output_commit_char(graph, sb); |
427fc5b8 | 867 | chars_written++; |
c12172d2 | 868 | |
a6c1a382 | 869 | if (graph->num_parents > 2) |
427fc5b8 AC |
870 | chars_written += graph_draw_octopus_merge(graph, |
871 | sb); | |
3395908e | 872 | } else if (seen_this && (graph->num_parents > 2)) { |
427fc5b8 AC |
873 | strbuf_write_column(sb, col, '\\'); |
874 | chars_written++; | |
3395908e AS |
875 | } else if (seen_this && (graph->num_parents == 2)) { |
876 | /* | |
877 | * This is a 2-way merge commit. | |
878 | * There is no GRAPH_PRE_COMMIT stage for 2-way | |
879 | * merges, so this is the first line of output | |
880 | * for this commit. Check to see what the previous | |
881 | * line of output was. | |
882 | * | |
883 | * If it was GRAPH_POST_MERGE, the branch line | |
884 | * coming into this commit may have been '\', | |
885 | * and not '|' or '/'. If so, output the branch | |
886 | * line as '\' on this line, instead of '|'. This | |
887 | * makes the output look nicer. | |
888 | */ | |
889 | if (graph->prev_state == GRAPH_POST_MERGE && | |
890 | graph->prev_commit_index < i) | |
427fc5b8 | 891 | strbuf_write_column(sb, col, '\\'); |
3395908e | 892 | else |
427fc5b8 AC |
893 | strbuf_write_column(sb, col, '|'); |
894 | chars_written++; | |
c12172d2 | 895 | } else { |
427fc5b8 AC |
896 | strbuf_write_column(sb, col, '|'); |
897 | chars_written++; | |
c12172d2 | 898 | } |
427fc5b8 AC |
899 | strbuf_addch(sb, ' '); |
900 | chars_written++; | |
c12172d2 AS |
901 | } |
902 | ||
427fc5b8 | 903 | graph_pad_horizontally(graph, sb, chars_written); |
c12172d2 AS |
904 | |
905 | /* | |
906 | * Update graph->state | |
907 | */ | |
908 | if (graph->num_parents > 1) | |
3395908e | 909 | graph_update_state(graph, GRAPH_POST_MERGE); |
c12172d2 | 910 | else if (graph_is_mapping_correct(graph)) |
3395908e | 911 | graph_update_state(graph, GRAPH_PADDING); |
c12172d2 | 912 | else |
3395908e | 913 | graph_update_state(graph, GRAPH_COLLAPSING); |
c12172d2 AS |
914 | } |
915 | ||
427fc5b8 AC |
916 | static struct column *find_new_column_by_commit(struct git_graph *graph, |
917 | struct commit *commit) | |
918 | { | |
919 | int i; | |
920 | for (i = 0; i < graph->num_new_columns; i++) { | |
921 | if (graph->new_columns[i].commit == commit) | |
922 | return &graph->new_columns[i]; | |
923 | } | |
67da52be | 924 | return NULL; |
427fc5b8 AC |
925 | } |
926 | ||
064bfbde | 927 | static void graph_output_post_merge_line(struct git_graph *graph, struct strbuf *sb) |
c12172d2 AS |
928 | { |
929 | int seen_this = 0; | |
427fc5b8 | 930 | int i, j, chars_written; |
c12172d2 AS |
931 | |
932 | /* | |
933 | * Output the post-merge row | |
934 | */ | |
427fc5b8 | 935 | chars_written = 0; |
c12172d2 | 936 | for (i = 0; i <= graph->num_columns; i++) { |
427fc5b8 | 937 | struct column *col = &graph->columns[i]; |
c12172d2 AS |
938 | struct commit *col_commit; |
939 | if (i == graph->num_columns) { | |
940 | if (seen_this) | |
941 | break; | |
942 | col_commit = graph->commit; | |
943 | } else { | |
427fc5b8 | 944 | col_commit = col->commit; |
c12172d2 AS |
945 | } |
946 | ||
947 | if (col_commit == graph->commit) { | |
427fc5b8 AC |
948 | /* |
949 | * Since the current commit is a merge find | |
950 | * the columns for the parent commits in | |
951 | * new_columns and use those to format the | |
952 | * edges. | |
953 | */ | |
954 | struct commit_list *parents = NULL; | |
955 | struct column *par_column; | |
c12172d2 | 956 | seen_this = 1; |
427fc5b8 AC |
957 | parents = first_interesting_parent(graph); |
958 | assert(parents); | |
959 | par_column = find_new_column_by_commit(graph, parents->item); | |
960 | assert(par_column); | |
961 | ||
962 | strbuf_write_column(sb, par_column, '|'); | |
963 | chars_written++; | |
964 | for (j = 0; j < graph->num_parents - 1; j++) { | |
965 | parents = next_interesting_parent(graph, parents); | |
966 | assert(parents); | |
967 | par_column = find_new_column_by_commit(graph, parents->item); | |
968 | assert(par_column); | |
969 | strbuf_write_column(sb, par_column, '\\'); | |
970 | strbuf_addch(sb, ' '); | |
971 | } | |
972 | chars_written += j * 2; | |
3395908e | 973 | } else if (seen_this) { |
427fc5b8 AC |
974 | strbuf_write_column(sb, col, '\\'); |
975 | strbuf_addch(sb, ' '); | |
976 | chars_written += 2; | |
c12172d2 | 977 | } else { |
427fc5b8 AC |
978 | strbuf_write_column(sb, col, '|'); |
979 | strbuf_addch(sb, ' '); | |
980 | chars_written += 2; | |
c12172d2 AS |
981 | } |
982 | } | |
983 | ||
427fc5b8 | 984 | graph_pad_horizontally(graph, sb, chars_written); |
c12172d2 AS |
985 | |
986 | /* | |
987 | * Update graph->state | |
988 | */ | |
989 | if (graph_is_mapping_correct(graph)) | |
3395908e | 990 | graph_update_state(graph, GRAPH_PADDING); |
c12172d2 | 991 | else |
3395908e | 992 | graph_update_state(graph, GRAPH_COLLAPSING); |
c12172d2 AS |
993 | } |
994 | ||
064bfbde | 995 | static void graph_output_collapsing_line(struct git_graph *graph, struct strbuf *sb) |
c12172d2 AS |
996 | { |
997 | int i; | |
998 | int *tmp_mapping; | |
eaf158f8 AC |
999 | short used_horizontal = 0; |
1000 | int horizontal_edge = -1; | |
1001 | int horizontal_edge_target = -1; | |
c12172d2 AS |
1002 | |
1003 | /* | |
1004 | * Clear out the new_mapping array | |
1005 | */ | |
1006 | for (i = 0; i < graph->mapping_size; i++) | |
1007 | graph->new_mapping[i] = -1; | |
1008 | ||
1009 | for (i = 0; i < graph->mapping_size; i++) { | |
1010 | int target = graph->mapping[i]; | |
1011 | if (target < 0) | |
1012 | continue; | |
1013 | ||
1014 | /* | |
1015 | * Since update_columns() always inserts the leftmost | |
1016 | * column first, each branch's target location should | |
1017 | * always be either its current location or to the left of | |
1018 | * its current location. | |
1019 | * | |
1020 | * We never have to move branches to the right. This makes | |
1021 | * the graph much more legible, since whenever branches | |
1022 | * cross, only one is moving directions. | |
1023 | */ | |
1024 | assert(target * 2 <= i); | |
1025 | ||
1026 | if (target * 2 == i) { | |
1027 | /* | |
1028 | * This column is already in the | |
1029 | * correct place | |
1030 | */ | |
1031 | assert(graph->new_mapping[i] == -1); | |
1032 | graph->new_mapping[i] = target; | |
1033 | } else if (graph->new_mapping[i - 1] < 0) { | |
1034 | /* | |
1035 | * Nothing is to the left. | |
1036 | * Move to the left by one | |
1037 | */ | |
1038 | graph->new_mapping[i - 1] = target; | |
eaf158f8 AC |
1039 | /* |
1040 | * If there isn't already an edge moving horizontally | |
1041 | * select this one. | |
1042 | */ | |
1043 | if (horizontal_edge == -1) { | |
1044 | int j; | |
1045 | horizontal_edge = i; | |
1046 | horizontal_edge_target = target; | |
1047 | /* | |
1048 | * The variable target is the index of the graph | |
1049 | * column, and therefore target*2+3 is the | |
1050 | * actual screen column of the first horizontal | |
1051 | * line. | |
1052 | */ | |
1053 | for (j = (target * 2)+3; j < (i - 2); j += 2) | |
1054 | graph->new_mapping[j] = target; | |
1055 | } | |
c12172d2 AS |
1056 | } else if (graph->new_mapping[i - 1] == target) { |
1057 | /* | |
1058 | * There is a branch line to our left | |
1059 | * already, and it is our target. We | |
1060 | * combine with this line, since we share | |
1061 | * the same parent commit. | |
1062 | * | |
1063 | * We don't have to add anything to the | |
1064 | * output or new_mapping, since the | |
1065 | * existing branch line has already taken | |
1066 | * care of it. | |
1067 | */ | |
1068 | } else { | |
1069 | /* | |
1070 | * There is a branch line to our left, | |
1071 | * but it isn't our target. We need to | |
1072 | * cross over it. | |
1073 | * | |
1074 | * The space just to the left of this | |
1075 | * branch should always be empty. | |
eaf158f8 AC |
1076 | * |
1077 | * The branch to the left of that space | |
1078 | * should be our eventual target. | |
c12172d2 AS |
1079 | */ |
1080 | assert(graph->new_mapping[i - 1] > target); | |
1081 | assert(graph->new_mapping[i - 2] < 0); | |
eaf158f8 | 1082 | assert(graph->new_mapping[i - 3] == target); |
c12172d2 | 1083 | graph->new_mapping[i - 2] = target; |
eaf158f8 AC |
1084 | /* |
1085 | * Mark this branch as the horizontal edge to | |
1086 | * prevent any other edges from moving | |
1087 | * horizontally. | |
1088 | */ | |
1089 | if (horizontal_edge == -1) | |
1090 | horizontal_edge = i; | |
c12172d2 AS |
1091 | } |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * The new mapping may be 1 smaller than the old mapping | |
1096 | */ | |
1097 | if (graph->new_mapping[graph->mapping_size - 1] < 0) | |
1098 | graph->mapping_size--; | |
1099 | ||
1100 | /* | |
1101 | * Output out a line based on the new mapping info | |
1102 | */ | |
1103 | for (i = 0; i < graph->mapping_size; i++) { | |
1104 | int target = graph->new_mapping[i]; | |
1105 | if (target < 0) | |
1106 | strbuf_addch(sb, ' '); | |
1107 | else if (target * 2 == i) | |
427fc5b8 | 1108 | strbuf_write_column(sb, &graph->new_columns[target], '|'); |
eaf158f8 AC |
1109 | else if (target == horizontal_edge_target && |
1110 | i != horizontal_edge - 1) { | |
1111 | /* | |
1112 | * Set the mappings for all but the | |
1113 | * first segment to -1 so that they | |
1114 | * won't continue into the next line. | |
1115 | */ | |
1116 | if (i != (target * 2)+3) | |
1117 | graph->new_mapping[i] = -1; | |
1118 | used_horizontal = 1; | |
1119 | strbuf_write_column(sb, &graph->new_columns[target], '_'); | |
1120 | } else { | |
1121 | if (used_horizontal && i < horizontal_edge) | |
1122 | graph->new_mapping[i] = -1; | |
427fc5b8 | 1123 | strbuf_write_column(sb, &graph->new_columns[target], '/'); |
eaf158f8 AC |
1124 | |
1125 | } | |
c12172d2 AS |
1126 | } |
1127 | ||
427fc5b8 | 1128 | graph_pad_horizontally(graph, sb, graph->mapping_size); |
c12172d2 AS |
1129 | |
1130 | /* | |
1131 | * Swap mapping and new_mapping | |
1132 | */ | |
1133 | tmp_mapping = graph->mapping; | |
1134 | graph->mapping = graph->new_mapping; | |
1135 | graph->new_mapping = tmp_mapping; | |
1136 | ||
1137 | /* | |
1138 | * If graph->mapping indicates that all of the branch lines | |
1139 | * are already in the correct positions, we are done. | |
1140 | * Otherwise, we need to collapse some branch lines together. | |
1141 | */ | |
1142 | if (graph_is_mapping_correct(graph)) | |
3395908e | 1143 | graph_update_state(graph, GRAPH_PADDING); |
c12172d2 AS |
1144 | } |
1145 | ||
064bfbde | 1146 | static int graph_next_line(struct git_graph *graph, struct strbuf *sb) |
c12172d2 AS |
1147 | { |
1148 | switch (graph->state) { | |
1149 | case GRAPH_PADDING: | |
1150 | graph_output_padding_line(graph, sb); | |
1151 | return 0; | |
1152 | case GRAPH_SKIP: | |
1153 | graph_output_skip_line(graph, sb); | |
1154 | return 0; | |
1155 | case GRAPH_PRE_COMMIT: | |
1156 | graph_output_pre_commit_line(graph, sb); | |
1157 | return 0; | |
1158 | case GRAPH_COMMIT: | |
1159 | graph_output_commit_line(graph, sb); | |
1160 | return 1; | |
1161 | case GRAPH_POST_MERGE: | |
1162 | graph_output_post_merge_line(graph, sb); | |
1163 | return 0; | |
1164 | case GRAPH_COLLAPSING: | |
1165 | graph_output_collapsing_line(graph, sb); | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | assert(0); | |
1170 | return 0; | |
1171 | } | |
1172 | ||
064bfbde | 1173 | static void graph_padding_line(struct git_graph *graph, struct strbuf *sb) |
c12172d2 AS |
1174 | { |
1175 | int i, j; | |
1176 | ||
1177 | if (graph->state != GRAPH_COMMIT) { | |
1178 | graph_next_line(graph, sb); | |
1179 | return; | |
1180 | } | |
1181 | ||
1182 | /* | |
1183 | * Output the row containing this commit | |
1184 | * Iterate up to and including graph->num_columns, | |
1185 | * since the current commit may not be in any of the existing | |
1186 | * columns. (This happens when the current commit doesn't have any | |
1187 | * children that we have already processed.) | |
1188 | */ | |
1189 | for (i = 0; i < graph->num_columns; i++) { | |
427fc5b8 AC |
1190 | struct column *col = &graph->columns[i]; |
1191 | struct commit *col_commit = col->commit; | |
c12172d2 | 1192 | if (col_commit == graph->commit) { |
427fc5b8 | 1193 | strbuf_write_column(sb, col, '|'); |
c12172d2 AS |
1194 | |
1195 | if (graph->num_parents < 3) | |
1196 | strbuf_addch(sb, ' '); | |
1197 | else { | |
1198 | int num_spaces = ((graph->num_parents - 2) * 2); | |
1199 | for (j = 0; j < num_spaces; j++) | |
1200 | strbuf_addch(sb, ' '); | |
1201 | } | |
1202 | } else { | |
427fc5b8 AC |
1203 | strbuf_write_column(sb, col, '|'); |
1204 | strbuf_addch(sb, ' '); | |
c12172d2 AS |
1205 | } |
1206 | } | |
1207 | ||
427fc5b8 | 1208 | graph_pad_horizontally(graph, sb, graph->num_columns); |
3395908e AS |
1209 | |
1210 | /* | |
1211 | * Update graph->prev_state since we have output a padding line | |
1212 | */ | |
1213 | graph->prev_state = GRAPH_PADDING; | |
c12172d2 AS |
1214 | } |
1215 | ||
1216 | int graph_is_commit_finished(struct git_graph const *graph) | |
1217 | { | |
1218 | return (graph->state == GRAPH_PADDING); | |
1219 | } | |
1220 | ||
1221 | void graph_show_commit(struct git_graph *graph) | |
1222 | { | |
f285a2d7 | 1223 | struct strbuf msgbuf = STRBUF_INIT; |
c12172d2 AS |
1224 | int shown_commit_line = 0; |
1225 | ||
1226 | if (!graph) | |
1227 | return; | |
1228 | ||
c12172d2 AS |
1229 | while (!shown_commit_line) { |
1230 | shown_commit_line = graph_next_line(graph, &msgbuf); | |
1231 | fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout); | |
1232 | if (!shown_commit_line) | |
1233 | putchar('\n'); | |
1234 | strbuf_setlen(&msgbuf, 0); | |
1235 | } | |
1236 | ||
1237 | strbuf_release(&msgbuf); | |
1238 | } | |
1239 | ||
1240 | void graph_show_oneline(struct git_graph *graph) | |
1241 | { | |
f285a2d7 | 1242 | struct strbuf msgbuf = STRBUF_INIT; |
c12172d2 AS |
1243 | |
1244 | if (!graph) | |
1245 | return; | |
1246 | ||
c12172d2 AS |
1247 | graph_next_line(graph, &msgbuf); |
1248 | fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout); | |
1249 | strbuf_release(&msgbuf); | |
1250 | } | |
1251 | ||
1252 | void graph_show_padding(struct git_graph *graph) | |
1253 | { | |
f285a2d7 | 1254 | struct strbuf msgbuf = STRBUF_INIT; |
c12172d2 AS |
1255 | |
1256 | if (!graph) | |
1257 | return; | |
1258 | ||
c12172d2 AS |
1259 | graph_padding_line(graph, &msgbuf); |
1260 | fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout); | |
1261 | strbuf_release(&msgbuf); | |
1262 | } | |
1263 | ||
1264 | int graph_show_remainder(struct git_graph *graph) | |
1265 | { | |
f285a2d7 | 1266 | struct strbuf msgbuf = STRBUF_INIT; |
c12172d2 AS |
1267 | int shown = 0; |
1268 | ||
1269 | if (!graph) | |
1270 | return 0; | |
1271 | ||
1272 | if (graph_is_commit_finished(graph)) | |
1273 | return 0; | |
1274 | ||
c12172d2 AS |
1275 | for (;;) { |
1276 | graph_next_line(graph, &msgbuf); | |
1277 | fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout); | |
1278 | strbuf_setlen(&msgbuf, 0); | |
1279 | shown = 1; | |
1280 | ||
1281 | if (!graph_is_commit_finished(graph)) | |
1282 | putchar('\n'); | |
1283 | else | |
1284 | break; | |
1285 | } | |
1286 | strbuf_release(&msgbuf); | |
1287 | ||
1288 | return shown; | |
1289 | } | |
1290 | ||
1291 | ||
064bfbde | 1292 | static void graph_show_strbuf(struct git_graph *graph, struct strbuf const *sb) |
c12172d2 AS |
1293 | { |
1294 | char *p; | |
1295 | ||
1296 | if (!graph) { | |
1297 | fwrite(sb->buf, sizeof(char), sb->len, stdout); | |
1298 | return; | |
1299 | } | |
1300 | ||
1301 | /* | |
1302 | * Print the strbuf line by line, | |
1303 | * and display the graph info before each line but the first. | |
1304 | */ | |
1305 | p = sb->buf; | |
1306 | while (p) { | |
1307 | size_t len; | |
1308 | char *next_p = strchr(p, '\n'); | |
1309 | if (next_p) { | |
1310 | next_p++; | |
1311 | len = next_p - p; | |
1312 | } else { | |
1313 | len = (sb->buf + sb->len) - p; | |
1314 | } | |
1315 | fwrite(p, sizeof(char), len, stdout); | |
1316 | if (next_p && *next_p != '\0') | |
1317 | graph_show_oneline(graph); | |
1318 | p = next_p; | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | void graph_show_commit_msg(struct git_graph *graph, | |
1323 | struct strbuf const *sb) | |
1324 | { | |
1325 | int newline_terminated; | |
1326 | ||
1327 | if (!graph) { | |
1328 | /* | |
1329 | * If there's no graph, just print the message buffer. | |
1330 | * | |
1331 | * The message buffer for CMIT_FMT_ONELINE and | |
1332 | * CMIT_FMT_USERFORMAT are already missing a terminating | |
1333 | * newline. All of the other formats should have it. | |
1334 | */ | |
1335 | fwrite(sb->buf, sizeof(char), sb->len, stdout); | |
1336 | return; | |
1337 | } | |
1338 | ||
1339 | newline_terminated = (sb->len && sb->buf[sb->len - 1] == '\n'); | |
1340 | ||
1341 | /* | |
1342 | * Show the commit message | |
1343 | */ | |
1344 | graph_show_strbuf(graph, sb); | |
1345 | ||
1346 | /* | |
1347 | * If there is more output needed for this commit, show it now | |
1348 | */ | |
1349 | if (!graph_is_commit_finished(graph)) { | |
1350 | /* | |
1351 | * If sb doesn't have a terminating newline, print one now, | |
1352 | * so we can start the remainder of the graph output on a | |
1353 | * new line. | |
1354 | */ | |
1355 | if (!newline_terminated) | |
1356 | putchar('\n'); | |
1357 | ||
1358 | graph_show_remainder(graph); | |
1359 | ||
1360 | /* | |
1361 | * If sb ends with a newline, our output should too. | |
1362 | */ | |
1363 | if (newline_terminated) | |
1364 | putchar('\n'); | |
1365 | } | |
1366 | } |