diff options
Diffstat (limited to 'graph.c')
| -rw-r--r-- | graph.c | 378 |
1 files changed, 292 insertions, 86 deletions
@@ -1,32 +1,52 @@ #include "cache.h" #include "commit.h" +#include "color.h" #include "graph.h" #include "diff.h" #include "revision.h" +/* Internal API */ + /* - * TODO: - * - Add colors to the graph. - * Pick a color for each column, and print all characters - * in that column with the specified color. + * Output the next line for a graph. + * This formats the next graph line into the specified strbuf. It is not + * terminated with a newline. * + * Returns 1 if the line includes the current commit, and 0 otherwise. + * graph_next_line() will return 1 exactly once for each time + * graph_update() is called. + */ +static int graph_next_line(struct git_graph *graph, struct strbuf *sb); + +/* + * Output a padding line in the graph. + * This is similar to graph_next_line(). However, it is guaranteed to + * never print the current commit line. Instead, if the commit line is + * next, it will simply output a line of vertical padding, extending the + * branch lines downwards, but leaving them otherwise unchanged. + */ +static void graph_padding_line(struct git_graph *graph, struct strbuf *sb); + +/* + * Print a strbuf to stdout. If the graph is non-NULL, all lines but the + * first will be prefixed with the graph output. + * + * If the strbuf ends with a newline, the output will end after this + * newline. A new graph line will not be printed after the final newline. + * If the strbuf is empty, no output will be printed. + * + * Since the first line will not include the graph output, the caller is + * responsible for printing this line's graph (perhaps via + * graph_show_commit() or graph_show_oneline()) before calling + * graph_show_strbuf(). + */ +static void graph_show_strbuf(struct git_graph *graph, struct strbuf const *sb); + +/* + * TODO: * - Limit the number of columns, similar to the way gitk does. * If we reach more than a specified number of columns, omit * sections of some columns. - * - * - The output during the GRAPH_PRE_COMMIT and GRAPH_COLLAPSING states - * could be made more compact by printing horizontal lines, instead of - * long diagonal lines. For example, during collapsing, something like - * this: instead of this: - * | | | | | | | | | | - * | |_|_|/ | | | |/ - * |/| | | | | |/| - * | | | | | |/| | - * |/| | | - * | | | | - * - * If there are several parallel diagonal lines, they will need to be - * replaced with horizontal lines on subsequent rows. */ struct column { @@ -35,9 +55,10 @@ struct column { */ struct commit *commit; /* - * XXX: Once we add support for colors, struct column could also - * contain the color of its branch line. + * The color to (optionally) print this column in. This is an + * index into column_colors. */ + unsigned short color; }; enum graph_state { @@ -49,6 +70,41 @@ enum graph_state { GRAPH_COLLAPSING }; +/* + * The list of available column colors. + */ +static char column_colors[][COLOR_MAXLEN] = { + GIT_COLOR_RED, + GIT_COLOR_GREEN, + GIT_COLOR_YELLOW, + GIT_COLOR_BLUE, + GIT_COLOR_MAGENTA, + GIT_COLOR_CYAN, + GIT_COLOR_BOLD GIT_COLOR_RED, + GIT_COLOR_BOLD GIT_COLOR_GREEN, + GIT_COLOR_BOLD GIT_COLOR_YELLOW, + GIT_COLOR_BOLD GIT_COLOR_BLUE, + GIT_COLOR_BOLD GIT_COLOR_MAGENTA, + GIT_COLOR_BOLD GIT_COLOR_CYAN, +}; + +#define COLUMN_COLORS_MAX (ARRAY_SIZE(column_colors)) + +static const char *column_get_color_code(const struct column *c) +{ + return column_colors[c->color]; +} + +static void strbuf_write_column(struct strbuf *sb, const struct column *c, + char col_char) +{ + if (c->color < COLUMN_COLORS_MAX) + strbuf_addstr(sb, column_get_color_code(c)); + strbuf_addch(sb, col_char); + if (c->color < COLUMN_COLORS_MAX) + strbuf_addstr(sb, GIT_COLOR_RESET); +} + struct git_graph { /* * The commit currently being processed @@ -148,6 +204,11 @@ struct git_graph { * temporary array each time we have to output a collapsing line. */ int *new_mapping; + /* + * The current default column color being used. This is + * stored as an index into the array column_colors. + */ + unsigned short default_column_color; }; struct git_graph *graph_init(struct rev_info *opt) @@ -164,6 +225,7 @@ struct git_graph *graph_init(struct rev_info *opt) graph->num_columns = 0; graph->num_new_columns = 0; graph->mapping_size = 0; + graph->default_column_color = 0; /* * Allocate a reasonably large default number of columns @@ -180,14 +242,6 @@ struct git_graph *graph_init(struct rev_info *opt) return graph; } -void graph_release(struct git_graph *graph) -{ - free(graph->columns); - free(graph->new_columns); - free(graph->mapping); - free(graph); -} - static void graph_update_state(struct git_graph *graph, enum graph_state s) { graph->prev_state = graph->state; @@ -283,6 +337,33 @@ static struct commit_list *first_interesting_parent(struct git_graph *graph) return next_interesting_parent(graph, parents); } +static unsigned short graph_get_current_column_color(const struct git_graph *graph) +{ + if (!DIFF_OPT_TST(&graph->revs->diffopt, COLOR_DIFF)) + return COLUMN_COLORS_MAX; + return graph->default_column_color; +} + +/* + * Update the graph's default column color. + */ +static void graph_increment_column_color(struct git_graph *graph) +{ + graph->default_column_color = (graph->default_column_color + 1) % + COLUMN_COLORS_MAX; +} + +static unsigned short graph_find_commit_color(const struct git_graph *graph, + const struct commit *commit) +{ + int i; + for (i = 0; i < graph->num_columns; i++) { + if (graph->columns[i].commit == commit) + return graph->columns[i].color; + } + return graph_get_current_column_color(graph); +} + static void graph_insert_into_new_columns(struct git_graph *graph, struct commit *commit, int *mapping_index) @@ -305,6 +386,7 @@ static void graph_insert_into_new_columns(struct git_graph *graph, * This commit isn't already in new_columns. Add it. */ graph->new_columns[graph->num_new_columns].commit = commit; + graph->new_columns[graph->num_new_columns].color = graph_find_commit_color(graph, commit); graph->mapping[*mapping_index] = graph->num_new_columns; *mapping_index += 2; graph->num_new_columns++; @@ -416,6 +498,12 @@ static void graph_update_columns(struct git_graph *graph) for (parent = first_interesting_parent(graph); parent; parent = next_interesting_parent(graph, parent)) { + /* + * If this is a merge increment the current + * color. + */ + if (graph->num_parents > 1) + graph_increment_column_color(graph); graph_insert_into_new_columns(graph, parent->item, &mapping_idx); @@ -531,7 +619,8 @@ static int graph_is_mapping_correct(struct git_graph *graph) return 1; } -static void graph_pad_horizontally(struct git_graph *graph, struct strbuf *sb) +static void graph_pad_horizontally(struct git_graph *graph, struct strbuf *sb, + int chars_written) { /* * Add additional spaces to the end of the strbuf, so that all @@ -541,10 +630,10 @@ static void graph_pad_horizontally(struct git_graph *graph, struct strbuf *sb) * aligned for the entire commit. */ int extra; - if (sb->len >= graph->width) + if (chars_written >= graph->width) return; - extra = graph->width - sb->len; + extra = graph->width - chars_written; strbuf_addf(sb, "%*s", (int) extra, ""); } @@ -567,10 +656,11 @@ static void graph_output_padding_line(struct git_graph *graph, * Output a padding row, that leaves all branch lines unchanged */ for (i = 0; i < graph->num_new_columns; i++) { - strbuf_addstr(sb, "| "); + strbuf_write_column(sb, &graph->new_columns[i], '|'); + strbuf_addch(sb, ' '); } - graph_pad_horizontally(graph, sb); + graph_pad_horizontally(graph, sb, graph->num_new_columns * 2); } static void graph_output_skip_line(struct git_graph *graph, struct strbuf *sb) @@ -580,7 +670,7 @@ static void graph_output_skip_line(struct git_graph *graph, struct strbuf *sb) * of the graph is missing. */ strbuf_addstr(sb, "..."); - graph_pad_horizontally(graph, sb); + graph_pad_horizontally(graph, sb, 3); if (graph->num_parents >= 3 && graph->commit_index < (graph->num_columns - 1)) @@ -594,6 +684,7 @@ static void graph_output_pre_commit_line(struct git_graph *graph, { int num_expansion_rows; int i, seen_this; + int chars_written; /* * This function formats a row that increases the space around a commit @@ -616,11 +707,14 @@ static void graph_output_pre_commit_line(struct git_graph *graph, * Output the row */ seen_this = 0; + chars_written = 0; for (i = 0; i < graph->num_columns; i++) { struct column *col = &graph->columns[i]; if (col->commit == graph->commit) { seen_this = 1; - strbuf_addf(sb, "| %*s", graph->expansion_row, ""); + strbuf_write_column(sb, col, '|'); + strbuf_addf(sb, "%*s", graph->expansion_row, ""); + chars_written += 1 + graph->expansion_row; } else if (seen_this && (graph->expansion_row == 0)) { /* * This is the first line of the pre-commit output. @@ -633,17 +727,22 @@ static void graph_output_pre_commit_line(struct git_graph *graph, */ if (graph->prev_state == GRAPH_POST_MERGE && graph->prev_commit_index < i) - strbuf_addstr(sb, "\\ "); + strbuf_write_column(sb, col, '\\'); else - strbuf_addstr(sb, "| "); + strbuf_write_column(sb, col, '|'); + chars_written++; } else if (seen_this && (graph->expansion_row > 0)) { - strbuf_addstr(sb, "\\ "); + strbuf_write_column(sb, col, '\\'); + chars_written++; } else { - strbuf_addstr(sb, "| "); + strbuf_write_column(sb, col, '|'); + chars_written++; } + strbuf_addch(sb, ' '); + chars_written++; } - graph_pad_horizontally(graph, sb); + graph_pad_horizontally(graph, sb, chars_written); /* * Increment graph->expansion_row, @@ -685,10 +784,34 @@ static void graph_output_commit_char(struct git_graph *graph, struct strbuf *sb) strbuf_addch(sb, '*'); } -void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb) +/* + * Draw an octopus merge and return the number of characters written. + */ +static int graph_draw_octopus_merge(struct git_graph *graph, + struct strbuf *sb) +{ + /* + * Here dashless_commits represents the number of parents + * which don't need to have dashes (because their edges fit + * neatly under the commit). + */ + const int dashless_commits = 2; + int col_num, i; + int num_dashes = + ((graph->num_parents - dashless_commits) * 2) - 1; + for (i = 0; i < num_dashes; i++) { + col_num = (i / 2) + dashless_commits; + strbuf_write_column(sb, &graph->new_columns[col_num], '-'); + } + col_num = (i / 2) + dashless_commits; + strbuf_write_column(sb, &graph->new_columns[col_num], '.'); + return num_dashes + 1; +} + +static void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb) { int seen_this = 0; - int i, j; + int i, chars_written; /* * Output the row containing this commit @@ -698,7 +821,9 @@ void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb) * children that we have already processed.) */ seen_this = 0; + chars_written = 0; for (i = 0; i <= graph->num_columns; i++) { + struct column *col = &graph->columns[i]; struct commit *col_commit; if (i == graph->num_columns) { if (seen_this) @@ -711,18 +836,14 @@ void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb) if (col_commit == graph->commit) { seen_this = 1; graph_output_commit_char(graph, sb); + chars_written++; - if (graph->num_parents < 3) - strbuf_addch(sb, ' '); - else { - int num_dashes = - ((graph->num_parents - 2) * 2) - 1; - for (j = 0; j < num_dashes; j++) - strbuf_addch(sb, '-'); - strbuf_addstr(sb, ". "); - } + if (graph->num_parents > 2) + chars_written += graph_draw_octopus_merge(graph, + sb); } else if (seen_this && (graph->num_parents > 2)) { - strbuf_addstr(sb, "\\ "); + strbuf_write_column(sb, col, '\\'); + chars_written++; } else if (seen_this && (graph->num_parents == 2)) { /* * This is a 2-way merge commit. @@ -739,15 +860,19 @@ void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb) */ if (graph->prev_state == GRAPH_POST_MERGE && graph->prev_commit_index < i) - strbuf_addstr(sb, "\\ "); + strbuf_write_column(sb, col, '\\'); else - strbuf_addstr(sb, "| "); + strbuf_write_column(sb, col, '|'); + chars_written++; } else { - strbuf_addstr(sb, "| "); + strbuf_write_column(sb, col, '|'); + chars_written++; } + strbuf_addch(sb, ' '); + chars_written++; } - graph_pad_horizontally(graph, sb); + graph_pad_horizontally(graph, sb, chars_written); /* * Update graph->state @@ -760,37 +885,75 @@ void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb) graph_update_state(graph, GRAPH_COLLAPSING); } -void graph_output_post_merge_line(struct git_graph *graph, struct strbuf *sb) +static struct column *find_new_column_by_commit(struct git_graph *graph, + struct commit *commit) +{ + int i; + for (i = 0; i < graph->num_new_columns; i++) { + if (graph->new_columns[i].commit == commit) + return &graph->new_columns[i]; + } + return NULL; +} + +static void graph_output_post_merge_line(struct git_graph *graph, struct strbuf *sb) { int seen_this = 0; - int i, j; + int i, j, chars_written; /* * Output the post-merge row */ + chars_written = 0; for (i = 0; i <= graph->num_columns; i++) { + struct column *col = &graph->columns[i]; struct commit *col_commit; if (i == graph->num_columns) { if (seen_this) break; col_commit = graph->commit; } else { - col_commit = graph->columns[i].commit; + col_commit = col->commit; } if (col_commit == graph->commit) { + /* + * Since the current commit is a merge find + * the columns for the parent commits in + * new_columns and use those to format the + * edges. + */ + struct commit_list *parents = NULL; + struct column *par_column; seen_this = 1; - strbuf_addch(sb, '|'); - for (j = 0; j < graph->num_parents - 1; j++) - strbuf_addstr(sb, "\\ "); + parents = first_interesting_parent(graph); + assert(parents); + par_column = find_new_column_by_commit(graph, parents->item); + assert(par_column); + + strbuf_write_column(sb, par_column, '|'); + chars_written++; + for (j = 0; j < graph->num_parents - 1; j++) { + parents = next_interesting_parent(graph, parents); + assert(parents); + par_column = find_new_column_by_commit(graph, parents->item); + assert(par_column); + strbuf_write_column(sb, par_column, '\\'); + strbuf_addch(sb, ' '); + } + chars_written += j * 2; } else if (seen_this) { - strbuf_addstr(sb, "\\ "); + strbuf_write_column(sb, col, '\\'); + strbuf_addch(sb, ' '); + chars_written += 2; } else { - strbuf_addstr(sb, "| "); + strbuf_write_column(sb, col, '|'); + strbuf_addch(sb, ' '); + chars_written += 2; } } - graph_pad_horizontally(graph, sb); + graph_pad_horizontally(graph, sb, chars_written); /* * Update graph->state @@ -801,10 +964,13 @@ void graph_output_post_merge_line(struct git_graph *graph, struct strbuf *sb) graph_update_state(graph, GRAPH_COLLAPSING); } -void graph_output_collapsing_line(struct git_graph *graph, struct strbuf *sb) +static void graph_output_collapsing_line(struct git_graph *graph, struct strbuf *sb) { int i; int *tmp_mapping; + short used_horizontal = 0; + int horizontal_edge = -1; + int horizontal_edge_target = -1; /* * Clear out the new_mapping array @@ -842,6 +1008,23 @@ void graph_output_collapsing_line(struct git_graph *graph, struct strbuf *sb) * Move to the left by one */ graph->new_mapping[i - 1] = target; + /* + * If there isn't already an edge moving horizontally + * select this one. + */ + if (horizontal_edge == -1) { + int j; + horizontal_edge = i; + horizontal_edge_target = target; + /* + * The variable target is the index of the graph + * column, and therefore target*2+3 is the + * actual screen column of the first horizontal + * line. + */ + for (j = (target * 2)+3; j < (i - 2); j += 2) + graph->new_mapping[j] = target; + } } else if (graph->new_mapping[i - 1] == target) { /* * There is a branch line to our left @@ -862,10 +1045,21 @@ void graph_output_collapsing_line(struct git_graph *graph, struct strbuf *sb) * * The space just to the left of this * branch should always be empty. + * + * The branch to the left of that space + * should be our eventual target. */ assert(graph->new_mapping[i - 1] > target); assert(graph->new_mapping[i - 2] < 0); + assert(graph->new_mapping[i - 3] == target); graph->new_mapping[i - 2] = target; + /* + * Mark this branch as the horizontal edge to + * prevent any other edges from moving + * horizontally. + */ + if (horizontal_edge == -1) + horizontal_edge = i; } } @@ -883,12 +1077,27 @@ void graph_output_collapsing_line(struct git_graph *graph, struct strbuf *sb) if (target < 0) strbuf_addch(sb, ' '); else if (target * 2 == i) - strbuf_addch(sb, '|'); - else - strbuf_addch(sb, '/'); + strbuf_write_column(sb, &graph->new_columns[target], '|'); + else if (target == horizontal_edge_target && + i != horizontal_edge - 1) { + /* + * Set the mappings for all but the + * first segment to -1 so that they + * won't continue into the next line. + */ + if (i != (target * 2)+3) + graph->new_mapping[i] = -1; + used_horizontal = 1; + strbuf_write_column(sb, &graph->new_columns[target], '_'); + } else { + if (used_horizontal && i < horizontal_edge) + graph->new_mapping[i] = -1; + strbuf_write_column(sb, &graph->new_columns[target], '/'); + + } } - graph_pad_horizontally(graph, sb); + graph_pad_horizontally(graph, sb, graph->mapping_size); /* * Swap mapping and new_mapping @@ -906,7 +1115,7 @@ void graph_output_collapsing_line(struct git_graph *graph, struct strbuf *sb) graph_update_state(graph, GRAPH_PADDING); } -int graph_next_line(struct git_graph *graph, struct strbuf *sb) +static int graph_next_line(struct git_graph *graph, struct strbuf *sb) { switch (graph->state) { case GRAPH_PADDING: @@ -933,7 +1142,7 @@ int graph_next_line(struct git_graph *graph, struct strbuf *sb) return 0; } -void graph_padding_line(struct git_graph *graph, struct strbuf *sb) +static void graph_padding_line(struct git_graph *graph, struct strbuf *sb) { int i, j; @@ -950,9 +1159,10 @@ void graph_padding_line(struct git_graph *graph, struct strbuf *sb) * children that we have already processed.) */ for (i = 0; i < graph->num_columns; i++) { - struct commit *col_commit = graph->columns[i].commit; + struct column *col = &graph->columns[i]; + struct commit *col_commit = col->commit; if (col_commit == graph->commit) { - strbuf_addch(sb, '|'); + strbuf_write_column(sb, col, '|'); if (graph->num_parents < 3) strbuf_addch(sb, ' '); @@ -962,11 +1172,12 @@ void graph_padding_line(struct git_graph *graph, struct strbuf *sb) strbuf_addch(sb, ' '); } } else { - strbuf_addstr(sb, "| "); + strbuf_write_column(sb, col, '|'); + strbuf_addch(sb, ' '); } } - graph_pad_horizontally(graph, sb); + graph_pad_horizontally(graph, sb, graph->num_columns); /* * Update graph->prev_state since we have output a padding line @@ -981,14 +1192,12 @@ int graph_is_commit_finished(struct git_graph const *graph) void graph_show_commit(struct git_graph *graph) { - struct strbuf msgbuf; + struct strbuf msgbuf = STRBUF_INIT; int shown_commit_line = 0; if (!graph) return; - strbuf_init(&msgbuf, 0); - while (!shown_commit_line) { shown_commit_line = graph_next_line(graph, &msgbuf); fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout); @@ -1002,12 +1211,11 @@ void graph_show_commit(struct git_graph *graph) void graph_show_oneline(struct git_graph *graph) { - struct strbuf msgbuf; + struct strbuf msgbuf = STRBUF_INIT; if (!graph) return; - strbuf_init(&msgbuf, 0); graph_next_line(graph, &msgbuf); fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout); strbuf_release(&msgbuf); @@ -1015,12 +1223,11 @@ void graph_show_oneline(struct git_graph *graph) void graph_show_padding(struct git_graph *graph) { - struct strbuf msgbuf; + struct strbuf msgbuf = STRBUF_INIT; if (!graph) return; - strbuf_init(&msgbuf, 0); graph_padding_line(graph, &msgbuf); fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout); strbuf_release(&msgbuf); @@ -1028,7 +1235,7 @@ void graph_show_padding(struct git_graph *graph) int graph_show_remainder(struct git_graph *graph) { - struct strbuf msgbuf; + struct strbuf msgbuf = STRBUF_INIT; int shown = 0; if (!graph) @@ -1037,7 +1244,6 @@ int graph_show_remainder(struct git_graph *graph) if (graph_is_commit_finished(graph)) return 0; - strbuf_init(&msgbuf, 0); for (;;) { graph_next_line(graph, &msgbuf); fwrite(msgbuf.buf, sizeof(char), msgbuf.len, stdout); @@ -1055,7 +1261,7 @@ int graph_show_remainder(struct git_graph *graph) } -void graph_show_strbuf(struct git_graph *graph, struct strbuf const *sb) +static void graph_show_strbuf(struct git_graph *graph, struct strbuf const *sb) { char *p; |