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Currently, the graph code is hardcoded to use ANSI color escapes for coloring the column characters in the generated graphs. This patch allows a custom scheme of colors to be set at runtime, allowing different types of color escapes to be used. A new function - graph_set_column_colors() - is added to the graph.h API, which allows a custom column_colors array (and column_colors_max value) to replace the builtin ANSI array (and _max value). The new function - if used - must be called before graph_init() is called. Signed-off-by: Johan Herland <johan@herland.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
109 lines
3.6 KiB
C
109 lines
3.6 KiB
C
#ifndef GRAPH_H
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#define GRAPH_H
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/* A graph is a pointer to this opaque structure */
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struct git_graph;
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/*
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* Set up a custom scheme for column colors.
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*
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* The default column color scheme inserts ANSI color escapes to colorize
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* the graph. The various color escapes are stored in an array of strings
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* where each entry corresponds to a color, except for the last entry,
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* which denotes the escape for resetting the color back to the default.
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* When generating the graph, strings from this array are inserted before
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* and after the various column characters.
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*
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* This function allows you to enable a custom array of color escapes.
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* The 'colors_max' argument is the index of the last "reset" entry.
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*
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* This functions must be called BEFORE graph_init() is called.
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*/
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void graph_set_column_colors(const char **colors, unsigned short colors_max);
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/*
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* Create a new struct git_graph.
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*/
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struct git_graph *graph_init(struct rev_info *opt);
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/*
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* Update a git_graph with a new commit.
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* This will cause the graph to begin outputting lines for the new commit
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* the next time graph_next_line() is called.
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*
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* If graph_update() is called before graph_is_commit_finished() returns 1,
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* the next call to graph_next_line() will output an ellipsis ("...")
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* to indicate that a portion of the graph is missing.
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*/
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void graph_update(struct git_graph *graph, struct commit *commit);
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/*
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* Determine if a graph has finished outputting lines for the current
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* commit.
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*
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* Returns 1 if graph_next_line() needs to be called again before
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* graph_update() should be called. Returns 0 if no more lines are needed
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* for this commit. If 0 is returned, graph_next_line() may still be
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* called without calling graph_update(), and it will merely output
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* appropriate "vertical padding" in the graph.
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*/
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int graph_is_commit_finished(struct git_graph const *graph);
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/*
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* Output the next line for a graph.
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* This formats the next graph line into the specified strbuf. It is not
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* terminated with a newline.
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*
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* Returns 1 if the line includes the current commit, and 0 otherwise.
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* graph_next_line() will return 1 exactly once for each time
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* graph_update() is called.
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*/
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int graph_next_line(struct git_graph *graph, struct strbuf *sb);
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/*
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* graph_show_*: helper functions for printing to stdout
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*/
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/*
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* If the graph is non-NULL, print the history graph to stdout,
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* up to and including the line containing this commit.
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* Does not print a terminating newline on the last line.
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*/
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void graph_show_commit(struct git_graph *graph);
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/*
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* If the graph is non-NULL, print one line of the history graph to stdout.
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* Does not print a terminating newline on the last line.
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*/
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void graph_show_oneline(struct git_graph *graph);
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/*
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* If the graph is non-NULL, print one line of vertical graph padding to
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* stdout. Does not print a terminating newline on the last line.
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*/
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void graph_show_padding(struct git_graph *graph);
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/*
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* If the graph is non-NULL, print the rest of the history graph for this
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* commit to stdout. Does not print a terminating newline on the last line.
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*/
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int graph_show_remainder(struct git_graph *graph);
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/*
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* Print a commit message strbuf and the remainder of the graph to stdout.
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*
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* This is similar to graph_show_strbuf(), but it always prints the
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* remainder of the graph.
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*
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* If the strbuf ends with a newline, the output printed by
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* graph_show_commit_msg() will end with a newline. If the strbuf is
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* missing a terminating newline (including if it is empty), the output
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* printed by graph_show_commit_msg() will also be missing a terminating
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* newline.
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*/
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void graph_show_commit_msg(struct git_graph *graph, struct strbuf const *sb);
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#endif /* GRAPH_H */
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