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graph API: Added logic for colored edges
Modified the graph drawing logic to colorize edges based on parent-child relationships similiarly to gitk. Signed-off-by: Allan Caffee <allan.caffee@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Allan Caffee
Junio C Hamano
parent
f800b65bea
commit
427fc5b888
1
color.h
1
color.h
@ -11,6 +11,7 @@
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#define GIT_COLOR_GREEN "\033[32m"
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#define GIT_COLOR_YELLOW "\033[33m"
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#define GIT_COLOR_BLUE "\033[34m"
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#define GIT_COLOR_MAGENTA "\033[35m"
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#define GIT_COLOR_CYAN "\033[36m"
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#define GIT_COLOR_BG_RED "\033[41m"
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246
graph.c
246
graph.c
@ -1,5 +1,6 @@
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#include "cache.h"
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#include "commit.h"
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#include "color.h"
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#include "graph.h"
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#include "diff.h"
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#include "revision.h"
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@ -43,10 +44,6 @@ static void graph_show_strbuf(struct git_graph *graph, struct strbuf const *sb);
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/*
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* TODO:
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* - Add colors to the graph.
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* Pick a color for each column, and print all characters
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* in that column with the specified color.
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*
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* - Limit the number of columns, similar to the way gitk does.
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* If we reach more than a specified number of columns, omit
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* sections of some columns.
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@ -72,9 +69,10 @@ struct column {
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*/
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struct commit *commit;
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/*
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* XXX: Once we add support for colors, struct column could also
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* contain the color of its branch line.
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* The color to (optionally) print this column in. This is an
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* index into column_colors.
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*/
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unsigned short color;
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};
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enum graph_state {
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@ -86,6 +84,41 @@ enum graph_state {
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GRAPH_COLLAPSING
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};
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/*
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* The list of available column colors.
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*/
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static char column_colors[][COLOR_MAXLEN] = {
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GIT_COLOR_RED,
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GIT_COLOR_GREEN,
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GIT_COLOR_YELLOW,
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GIT_COLOR_BLUE,
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GIT_COLOR_MAGENTA,
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GIT_COLOR_CYAN,
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GIT_COLOR_BOLD GIT_COLOR_RED,
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GIT_COLOR_BOLD GIT_COLOR_GREEN,
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GIT_COLOR_BOLD GIT_COLOR_YELLOW,
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GIT_COLOR_BOLD GIT_COLOR_BLUE,
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GIT_COLOR_BOLD GIT_COLOR_MAGENTA,
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GIT_COLOR_BOLD GIT_COLOR_CYAN,
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};
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#define COLUMN_COLORS_MAX (ARRAY_SIZE(column_colors))
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static const char *column_get_color_code(const struct column *c)
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{
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return column_colors[c->color];
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}
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static void strbuf_write_column(struct strbuf *sb, const struct column *c,
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char col_char)
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{
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if (c->color < COLUMN_COLORS_MAX)
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strbuf_addstr(sb, column_get_color_code(c));
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strbuf_addch(sb, col_char);
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if (c->color < COLUMN_COLORS_MAX)
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strbuf_addstr(sb, GIT_COLOR_RESET);
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}
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struct git_graph {
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/*
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* The commit currently being processed
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@ -185,6 +218,11 @@ struct git_graph {
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* temporary array each time we have to output a collapsing line.
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*/
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int *new_mapping;
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/*
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* The current default column color being used. This is
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* stored as an index into the array column_colors.
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*/
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unsigned short default_column_color;
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};
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struct git_graph *graph_init(struct rev_info *opt)
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@ -201,6 +239,7 @@ struct git_graph *graph_init(struct rev_info *opt)
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graph->num_columns = 0;
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graph->num_new_columns = 0;
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graph->mapping_size = 0;
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graph->default_column_color = 0;
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/*
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* Allocate a reasonably large default number of columns
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@ -312,6 +351,33 @@ static struct commit_list *first_interesting_parent(struct git_graph *graph)
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return next_interesting_parent(graph, parents);
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}
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static unsigned short graph_get_current_column_color(const struct git_graph *graph)
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{
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if (!DIFF_OPT_TST(&graph->revs->diffopt, COLOR_DIFF))
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return COLUMN_COLORS_MAX;
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return graph->default_column_color;
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}
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/*
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* Update the graph's default column color.
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*/
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static void graph_increment_column_color(struct git_graph *graph)
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{
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graph->default_column_color = (graph->default_column_color + 1) %
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COLUMN_COLORS_MAX;
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}
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static unsigned short graph_find_commit_color(const struct git_graph *graph,
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const struct commit *commit)
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{
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int i;
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for (i = 0; i < graph->num_columns; i++) {
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if (graph->columns[i].commit == commit)
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return graph->columns[i].color;
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}
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return graph_get_current_column_color(graph);
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}
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static void graph_insert_into_new_columns(struct git_graph *graph,
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struct commit *commit,
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int *mapping_index)
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@ -334,6 +400,7 @@ static void graph_insert_into_new_columns(struct git_graph *graph,
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* This commit isn't already in new_columns. Add it.
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*/
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graph->new_columns[graph->num_new_columns].commit = commit;
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graph->new_columns[graph->num_new_columns].color = graph_find_commit_color(graph, commit);
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graph->mapping[*mapping_index] = graph->num_new_columns;
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*mapping_index += 2;
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graph->num_new_columns++;
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@ -445,6 +512,12 @@ static void graph_update_columns(struct git_graph *graph)
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for (parent = first_interesting_parent(graph);
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parent;
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parent = next_interesting_parent(graph, parent)) {
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/*
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* If this is a merge increment the current
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* color.
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*/
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if (graph->num_parents > 1)
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graph_increment_column_color(graph);
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graph_insert_into_new_columns(graph,
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parent->item,
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&mapping_idx);
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@ -560,7 +633,8 @@ static int graph_is_mapping_correct(struct git_graph *graph)
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return 1;
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}
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static void graph_pad_horizontally(struct git_graph *graph, struct strbuf *sb)
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static void graph_pad_horizontally(struct git_graph *graph, struct strbuf *sb,
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int chars_written)
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{
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/*
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* Add additional spaces to the end of the strbuf, so that all
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@ -570,10 +644,10 @@ static void graph_pad_horizontally(struct git_graph *graph, struct strbuf *sb)
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* aligned for the entire commit.
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*/
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int extra;
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if (sb->len >= graph->width)
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if (chars_written >= graph->width)
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return;
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extra = graph->width - sb->len;
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extra = graph->width - chars_written;
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strbuf_addf(sb, "%*s", (int) extra, "");
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}
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@ -596,10 +670,11 @@ static void graph_output_padding_line(struct git_graph *graph,
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* Output a padding row, that leaves all branch lines unchanged
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*/
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for (i = 0; i < graph->num_new_columns; i++) {
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strbuf_addstr(sb, "| ");
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strbuf_write_column(sb, &graph->new_columns[i], '|');
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strbuf_addch(sb, ' ');
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}
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graph_pad_horizontally(graph, sb);
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graph_pad_horizontally(graph, sb, graph->num_new_columns * 2);
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}
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static void graph_output_skip_line(struct git_graph *graph, struct strbuf *sb)
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@ -609,7 +684,7 @@ static void graph_output_skip_line(struct git_graph *graph, struct strbuf *sb)
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* of the graph is missing.
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*/
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strbuf_addstr(sb, "...");
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graph_pad_horizontally(graph, sb);
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graph_pad_horizontally(graph, sb, 3);
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if (graph->num_parents >= 3 &&
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graph->commit_index < (graph->num_columns - 1))
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@ -623,6 +698,7 @@ static void graph_output_pre_commit_line(struct git_graph *graph,
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{
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int num_expansion_rows;
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int i, seen_this;
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int chars_written;
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/*
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* This function formats a row that increases the space around a commit
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@ -645,11 +721,14 @@ static void graph_output_pre_commit_line(struct git_graph *graph,
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* Output the row
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*/
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seen_this = 0;
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chars_written = 0;
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for (i = 0; i < graph->num_columns; i++) {
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struct column *col = &graph->columns[i];
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if (col->commit == graph->commit) {
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seen_this = 1;
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strbuf_addf(sb, "| %*s", graph->expansion_row, "");
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strbuf_write_column(sb, col, '|');
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strbuf_addf(sb, " %*s", graph->expansion_row, "");
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chars_written += 2 + graph->expansion_row;
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} else if (seen_this && (graph->expansion_row == 0)) {
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/*
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* This is the first line of the pre-commit output.
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@ -662,17 +741,22 @@ static void graph_output_pre_commit_line(struct git_graph *graph,
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*/
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if (graph->prev_state == GRAPH_POST_MERGE &&
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graph->prev_commit_index < i)
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strbuf_addstr(sb, "\\ ");
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strbuf_write_column(sb, col, '\\');
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else
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strbuf_addstr(sb, "| ");
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strbuf_write_column(sb, col, '|');
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chars_written++;
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} else if (seen_this && (graph->expansion_row > 0)) {
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strbuf_addstr(sb, "\\ ");
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strbuf_write_column(sb, col, '\\');
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chars_written++;
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} else {
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strbuf_addstr(sb, "| ");
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strbuf_write_column(sb, col, '|');
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chars_written++;
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}
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strbuf_addch(sb, ' ');
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chars_written++;
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}
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graph_pad_horizontally(graph, sb);
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graph_pad_horizontally(graph, sb, chars_written);
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/*
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* Increment graph->expansion_row,
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@ -714,10 +798,34 @@ static void graph_output_commit_char(struct git_graph *graph, struct strbuf *sb)
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strbuf_addch(sb, '*');
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}
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/*
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* Draw an octopus merge and return the number of characters written.
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*/
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static int graph_draw_octopus_merge(struct git_graph *graph,
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struct strbuf *sb)
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{
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/*
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* Here dashless_commits represents the number of parents
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* which don't need to have dashes (because their edges fit
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* neatly under the commit).
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*/
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const int dashless_commits = 2;
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int col_num, i;
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int num_dashes =
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((graph->num_parents - dashless_commits) * 2) - 1;
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for (i = 0; i < num_dashes; i++) {
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col_num = (i / 2) + dashless_commits;
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strbuf_write_column(sb, &graph->new_columns[col_num], '-');
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}
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col_num = (i / 2) + dashless_commits;
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strbuf_write_column(sb, &graph->new_columns[col_num], '.');
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return num_dashes + 1;
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}
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static void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb)
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{
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int seen_this = 0;
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int i, j;
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int i, chars_written;
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/*
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* Output the row containing this commit
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@ -727,7 +835,9 @@ static void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb)
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* children that we have already processed.)
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*/
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seen_this = 0;
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chars_written = 0;
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for (i = 0; i <= graph->num_columns; i++) {
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struct column *col = &graph->columns[i];
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struct commit *col_commit;
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if (i == graph->num_columns) {
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if (seen_this)
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@ -740,18 +850,14 @@ static void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb)
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if (col_commit == graph->commit) {
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seen_this = 1;
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graph_output_commit_char(graph, sb);
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chars_written++;
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if (graph->num_parents < 3)
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strbuf_addch(sb, ' ');
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else {
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int num_dashes =
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((graph->num_parents - 2) * 2) - 1;
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for (j = 0; j < num_dashes; j++)
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strbuf_addch(sb, '-');
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strbuf_addstr(sb, ". ");
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}
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if (graph->num_parents > 3)
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chars_written += graph_draw_octopus_merge(graph,
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sb);
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} else if (seen_this && (graph->num_parents > 2)) {
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strbuf_addstr(sb, "\\ ");
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strbuf_write_column(sb, col, '\\');
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chars_written++;
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} else if (seen_this && (graph->num_parents == 2)) {
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/*
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* This is a 2-way merge commit.
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@ -768,15 +874,19 @@ static void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb)
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*/
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if (graph->prev_state == GRAPH_POST_MERGE &&
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graph->prev_commit_index < i)
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strbuf_addstr(sb, "\\ ");
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strbuf_write_column(sb, col, '\\');
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else
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strbuf_addstr(sb, "| ");
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strbuf_write_column(sb, col, '|');
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chars_written++;
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} else {
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strbuf_addstr(sb, "| ");
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strbuf_write_column(sb, col, '|');
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chars_written++;
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}
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strbuf_addch(sb, ' ');
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chars_written++;
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}
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graph_pad_horizontally(graph, sb);
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graph_pad_horizontally(graph, sb, chars_written);
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/*
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* Update graph->state
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@ -789,37 +899,75 @@ static void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb)
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graph_update_state(graph, GRAPH_COLLAPSING);
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}
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static struct column *find_new_column_by_commit(struct git_graph *graph,
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struct commit *commit)
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{
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int i;
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for (i = 0; i < graph->num_new_columns; i++) {
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if (graph->new_columns[i].commit == commit)
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return &graph->new_columns[i];
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}
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return 0;
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}
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static void graph_output_post_merge_line(struct git_graph *graph, struct strbuf *sb)
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{
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int seen_this = 0;
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int i, j;
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int i, j, chars_written;
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/*
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* Output the post-merge row
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*/
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chars_written = 0;
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for (i = 0; i <= graph->num_columns; i++) {
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struct column *col = &graph->columns[i];
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struct commit *col_commit;
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if (i == graph->num_columns) {
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if (seen_this)
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break;
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col_commit = graph->commit;
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} else {
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col_commit = graph->columns[i].commit;
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col_commit = col->commit;
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}
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if (col_commit == graph->commit) {
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/*
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* Since the current commit is a merge find
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* the columns for the parent commits in
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* new_columns and use those to format the
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* edges.
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*/
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struct commit_list *parents = NULL;
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struct column *par_column;
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seen_this = 1;
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strbuf_addch(sb, '|');
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for (j = 0; j < graph->num_parents - 1; j++)
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strbuf_addstr(sb, "\\ ");
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parents = first_interesting_parent(graph);
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assert(parents);
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par_column = find_new_column_by_commit(graph, parents->item);
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assert(par_column);
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strbuf_write_column(sb, par_column, '|');
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chars_written++;
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for (j = 0; j < graph->num_parents - 1; j++) {
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parents = next_interesting_parent(graph, parents);
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assert(parents);
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par_column = find_new_column_by_commit(graph, parents->item);
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assert(par_column);
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strbuf_write_column(sb, par_column, '\\');
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strbuf_addch(sb, ' ');
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}
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chars_written += j * 2;
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} else if (seen_this) {
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strbuf_addstr(sb, "\\ ");
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strbuf_write_column(sb, col, '\\');
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strbuf_addch(sb, ' ');
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chars_written += 2;
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} else {
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strbuf_addstr(sb, "| ");
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strbuf_write_column(sb, col, '|');
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strbuf_addch(sb, ' ');
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chars_written += 2;
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}
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}
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graph_pad_horizontally(graph, sb);
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graph_pad_horizontally(graph, sb, chars_written);
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/*
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* Update graph->state
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@ -912,12 +1060,12 @@ static void graph_output_collapsing_line(struct git_graph *graph, struct strbuf
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if (target < 0)
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strbuf_addch(sb, ' ');
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else if (target * 2 == i)
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strbuf_addch(sb, '|');
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strbuf_write_column(sb, &graph->new_columns[target], '|');
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else
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strbuf_addch(sb, '/');
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strbuf_write_column(sb, &graph->new_columns[target], '/');
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}
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graph_pad_horizontally(graph, sb);
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graph_pad_horizontally(graph, sb, graph->mapping_size);
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/*
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* Swap mapping and new_mapping
|
||||
@ -979,9 +1127,10 @@ static 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, ' ');
|
||||
@ -991,11 +1140,12 @@ static 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
|
||||
|
||||
Loading…
Reference in New Issue
Block a user