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/* ui-refs.c: browse symbolic refs
 *
 * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include "cgit.h"
#include "ui-refs.h"
#include "html.h"
#include "ui-shared.h"

static inline int cmp_age(int age1, int age2)
{
	/* age1 and age2 are assumed to be non-negative */
	return age2 - age1;
}

static int cmp_ref_name(const void *a, const void *b)
{
	struct refinfo *r1 = *(struct refinfo **)a;
	struct refinfo *r2 = *(struct refinfo **)b;

	return strcmp(r1->refname, r2->refname);
}

static int cmp_branch_age(const void *a, const void *b)
{
	struct refinfo *r1 = *(struct refinfo **)a;
	struct refinfo *r2 = *(struct refinfo **)b;

	return cmp_age(r1->commit->committer_date, r2->commit->committer_date);
}

static int get_ref_age(struct refinfo *ref)
{
	if (!ref->object)
		return 0;
	switch (ref->object->type) {
	case OBJ_TAG:
		return ref->tag ? ref->tag->tagger_date : 0;
	case OBJ_COMMIT:
		return ref->commit ? ref->commit->committer_date : 0;
	}
	return 0;
}

static int cmp_tag_age(const void *a, const void *b)
{
	struct refinfo *r1 = *(struct refinfo **)a;
	struct refinfo *r2 = *(struct refinfo **)b;

	return cmp_age(get_ref_age(r1), get_ref_age(r2));
}

static int print_branch(struct refinfo *ref)
{
	struct commitinfo *info = ref->commit;
	char *name = (char *)ref->refname;

	if (!info)
		return 1;
	html("<tr><td>");
	cgit_log_link(name, NULL, NULL, name, NULL, NULL, 0, NULL, NULL,
		      ctx.qry.showmsg, 0);
	html("</td><td>");

	if (ref->object->type == OBJ_COMMIT) {
		cgit_commit_link(info->subject, NULL, NULL, name, NULL, NULL);
		html("</td><td>");
		cgit_open_filter(ctx.repo->email_filter, info->author_email, "refs");
		html_txt(info->author);
		cgit_close_filter(ctx.repo->email_filter);
		html("</td><td colspan='2'>");
		cgit_print_age(info->committer_date, info->committer_tz, -1);
	} else {
		html("</td><td></td><td>");
		cgit_object_link(ref->object);
	}
	html("</td></tr>\n");
	return 0;
}

static void print_tag_header(void)
{
	html("<tr class='nohover'><th class='left'>Tag</th>"
	     "<th class='left'>Download</th>"
	     "<th class='left'>Author</th>"
	     "<th class='left' colspan='2'>Age</th></tr>\n");
}

static int print_tag(struct refinfo *ref)
{
	struct tag *tag = NULL;
	struct taginfo *info = NULL;
	char *name = (char *)ref->refname;
	struct object *obj = ref->object;

	if (obj->type == OBJ_TAG) {
		tag = (struct tag *)obj;
		obj = tag->tagged;
		info = ref->tag;
		if (!info)
			return 1;
	}

	html("<tr><td>");
	cgit_tag_link(name, NULL, NULL, name);
	html("</td><td>");
	if (ctx.repo->snapshots && (obj->type == OBJ_COMMIT))
		cgit_print_snapshot_links(ctx.repo, name, "&nbsp;&nbsp;");
	else
		cgit_object_link(obj);
	html("</td><td>");
	if (info) {
		if (info->tagger) {
			cgit_open_filter(ctx.repo->email_filter, info->tagger_email, "refs");
			html_txt(info->tagger);
			cgit_close_filter(ctx.repo->email_filter);
		}
	} else if (ref->object->type == OBJ_COMMIT) {
		cgit_open_filter(ctx.repo->email_filter, ref->commit->author_email, "refs");
		html_txt(ref->commit->author);
		cgit_close_filter(ctx.repo->email_filter);
	}
	html("</td><td colspan='2'>");
	if (info) {
		if (info->tagger_date > 0)
			cgit_print_age(info->tagger_date, info->tagger_tz, -1);
	} else if (ref->object->type == OBJ_COMMIT) {
		cgit_print_age(ref->commit->commit->date, 0, -1);
	}
	html("</td></tr>\n");

	return 0;
}

static void print_refs_link(const char *path)
{
	html("<tr class='nohover'><td colspan='5'>");
	cgit_refs_link("[...]", NULL, NULL, ctx.qry.head, NULL, path);
	html("</td></tr>");
}

void cgit_print_branches(int maxcount)
{
	struct reflist list;
	int i;

	html("<tr class='nohover'><th class='left'>Branch</th>"
	     "<th class='left'>Commit message</th>"
	     "<th class='left'>Author</th>"
	     "<th class='left' colspan='2'>Age</th></tr>\n");

	list.refs = NULL;
	list.alloc = list.count = 0;
	for_each_branch_ref(cgit_refs_cb, &list);
	if (ctx.repo->enable_remote_branches)
		for_each_remote_ref(cgit_refs_cb, &list);

	if (maxcount == 0 || maxcount > list.count)
		maxcount = list.count;

	qsort(list.refs, list.count, sizeof(*list.refs), cmp_branch_age);
	if (ctx.repo->branch_sort == 0)
		qsort(list.refs, maxcount, sizeof(*list.refs), cmp_ref_name);

	for (i = 0; i < maxcount; i++)
		print_branch(list.refs[i]);

	if (maxcount < list.count)
		print_refs_link("heads");

	cgit_free_reflist_inner(&list);
}

void cgit_print_tags(int maxcount)
{
	struct reflist list;
	int i;

	list.refs = NULL;
	list.alloc = list.count = 0;
	for_each_tag_ref(cgit_refs_cb, &list);
	if (list.count == 0)
		return;
	qsort(list.refs, list.count, sizeof(*list.refs), cmp_tag_age);
	if (!maxcount)
		maxcount = list.count;
	else if (maxcount > list.count)
		maxcount = list.count;
	print_tag_header();
	for (i = 0; i < maxcount; i++)
		print_tag(list.refs[i]);

	if (maxcount < list.count)
		print_refs_link("tags");

	cgit_free_reflist_inner(&list);
}

void cgit_print_refs(void)
{
	cgit_print_layout_start();
	html("<table class='list nowrap'>");

	if (ctx.qry.path && starts_with(ctx.qry.path, "heads"))
		cgit_print_branches(0);
	else if (ctx.qry.path && starts_with(ctx.qry.path, "tags"))
		cgit_print_tags(0);
	else {
		cgit_print_branches(0);
		html("<tr class='nohover'><td colspan='5'>&nbsp;</td></tr>");
		cgit_print_tags(0);
	}
	html("</table>");
	cgit_print_layout_end();
}
/span> regexp; unsigned linenum:1; unsigned invert:1; unsigned status_only:1; unsigned name_only:1; unsigned unmatch_name_only:1; unsigned count:1; unsigned word_regexp:1; unsigned fixed:1; unsigned all_match:1; #define GREP_BINARY_DEFAULT 0 #define GREP_BINARY_NOMATCH 1 #define GREP_BINARY_TEXT 2 unsigned binary:2; unsigned extended:1; unsigned relative:1; unsigned pathname:1; int regflags; unsigned pre_context; unsigned post_context; }; extern void compile_grep_patterns(struct grep_opt *opt); extern void free_grep_patterns(struct grep_opt *opt); /* * from git:object.h */ extern const char *type_names[9]; struct object_list { struct object *item; struct object_list *next; }; struct object_refs { unsigned count; struct object *base; struct object *ref[FLEX_ARRAY]; /* more */ }; struct object_array { unsigned int nr; unsigned int alloc; struct object_array_entry { struct object *item; const char *name; } *objects; }; #define TYPE_BITS 3 #define FLAG_BITS 27 /* * The object type is stored in 3 bits. */ struct object { unsigned parsed : 1; unsigned used : 1; unsigned type : TYPE_BITS; unsigned flags : FLAG_BITS; unsigned char sha1[20]; }; /* * from git:tree.h */ struct tree { struct object object; void *buffer; unsigned long size; }; struct tree *lookup_tree(const unsigned char *sha1); int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size); int parse_tree(struct tree *tree); struct tree *parse_tree_indirect(const unsigned char *sha1); typedef int (*read_tree_fn_t)(const unsigned char *, const char *, int, const char *, unsigned int, int); extern int read_tree_recursive(struct tree *tree, const char *base, int baselen, int stage, const char **match, read_tree_fn_t fn); extern int read_tree(struct tree *tree, int stage, const char **paths); /* from git:commit.h */ struct commit_list { struct commit *item; struct commit_list *next; }; struct commit { struct object object; void *util; unsigned long date; struct commit_list *parents; struct tree *tree; char *buffer; }; struct commit *lookup_commit(const unsigned char *sha1); struct commit *lookup_commit_reference(const unsigned char *sha1); struct commit *lookup_commit_reference_gently(const unsigned char *sha1, int quiet); int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size); int parse_commit(struct commit *item); struct commit_list * commit_list_insert(struct commit *item, struct commit_list **list_p); struct commit_list * insert_by_date(struct commit *item, struct commit_list **list); void free_commit_list(struct commit_list *list); void sort_by_date(struct commit_list **list); /* Commit formats */ enum cmit_fmt { CMIT_FMT_RAW, CMIT_FMT_MEDIUM, CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM, CMIT_FMT_SHORT, CMIT_FMT_FULL, CMIT_FMT_FULLER, CMIT_FMT_ONELINE, CMIT_FMT_EMAIL, CMIT_FMT_UNSPECIFIED, }; extern unsigned long pretty_print_commit(enum cmit_fmt fmt, const struct commit *, unsigned long len, char *buf, unsigned long space, int abbrev, const char *subject, const char *after_subject, int relative_date); typedef void (*topo_sort_set_fn_t)(struct commit*, void *data); typedef void* (*topo_sort_get_fn_t)(struct commit*); /* * from git:tag.h */ extern const char *tag_type; struct tag { struct object object; struct object *tagged; char *tag; char *signature; /* not actually implemented */ }; extern struct tag *lookup_tag(const unsigned char *sha1); extern int parse_tag_buffer(struct tag *item, void *data, unsigned long size); extern int parse_tag(struct tag *item); extern struct object *deref_tag(struct object *, const char *, int); /* * from git:diffcore.h */ struct diff_filespec { unsigned char sha1[20]; char *path; void *data; void *cnt_data; unsigned long size; int xfrm_flags; /* for use by the xfrm */ unsigned short mode; /* file mode */ unsigned sha1_valid : 1; /* if true, use sha1 and trust mode; * if false, use the name and read from * the filesystem. */ #define DIFF_FILE_VALID(spec) (((spec)->mode) != 0) unsigned should_free : 1; /* data should be free()'ed */ unsigned should_munmap : 1; /* data should be munmap()'ed */ }; struct diff_filepair { struct diff_filespec *one; struct diff_filespec *two; unsigned short int score; char status; /* M C R N D U (see Documentation/diff-format.txt) */ unsigned source_stays : 1; /* all of R/C are copies */ unsigned broken_pair : 1; unsigned renamed_pair : 1; }; #define DIFF_PAIR_UNMERGED(p) \ (!DIFF_FILE_VALID((p)->one) && !DIFF_FILE_VALID((p)->two)) #define DIFF_PAIR_RENAME(p) ((p)->renamed_pair) #define DIFF_PAIR_BROKEN(p) \ ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \ ((p)->broken_pair != 0) ) #define DIFF_PAIR_TYPE_CHANGED(p) \ ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode)) #define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode) extern void diff_free_filepair(struct diff_filepair *); extern int diff_unmodified_pair(struct diff_filepair *); struct diff_queue_struct { struct diff_filepair **queue; int alloc; int nr; }; /* * from git:diff.h */ struct rev_info; struct diff_options; struct diff_queue_struct; typedef void (*change_fn_t)(struct diff_options *options, unsigned old_mode, unsigned new_mode, const unsigned char *old_sha1, const unsigned char *new_sha1, const char *base, const char *path); typedef void (*add_remove_fn_t)(struct diff_options *options, int addremove, unsigned mode, const unsigned char *sha1, const char *base, const char *path); typedef void (*diff_format_fn_t)(struct diff_queue_struct *q, struct diff_options *options, void *data); #define DIFF_FORMAT_RAW 0x0001 #define DIFF_FORMAT_DIFFSTAT 0x0002 #define DIFF_FORMAT_NUMSTAT 0x0004 #define DIFF_FORMAT_SUMMARY 0x0008 #define DIFF_FORMAT_PATCH 0x0010 /* These override all above */ #define DIFF_FORMAT_NAME 0x0100 #define DIFF_FORMAT_NAME_STATUS 0x0200 #define DIFF_FORMAT_CHECKDIFF 0x0400 /* Same as output_format = 0 but we know that -s flag was given * and we should not give default value to output_format. */ #define DIFF_FORMAT_NO_OUTPUT 0x0800 #define DIFF_FORMAT_CALLBACK 0x1000 struct diff_options { const char *filter; const char *orderfile; const char *pickaxe; const char *single_follow; unsigned recursive:1, tree_in_recursive:1, binary:1, text:1, full_index:1, silent_on_remove:1, find_copies_harder:1, color_diff:1, color_diff_words:1; int context; int break_opt; int detect_rename; int line_termination; int output_format; int pickaxe_opts; int rename_score; int reverse_diff; int rename_limit; int setup; int abbrev; const char *msg_sep; const char *stat_sep; long xdl_opts; int stat_width; int stat_name_width; int nr_paths; const char **paths; int *pathlens; change_fn_t change; add_remove_fn_t add_remove; diff_format_fn_t format_callback; void *format_callback_data; }; enum color_diff { DIFF_RESET = 0, DIFF_PLAIN = 1, DIFF_METAINFO = 2, DIFF_FRAGINFO = 3, DIFF_FILE_OLD = 4, DIFF_FILE_NEW = 5, DIFF_COMMIT = 6, DIFF_WHITESPACE = 7, }; extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const char *base, struct diff_options *opt); extern int diff_root_tree_sha1(const unsigned char *new, const char *base, struct diff_options *opt); extern int git_diff_ui_config(const char *var, const char *value); extern void diff_setup(struct diff_options *); extern int diff_opt_parse(struct diff_options *, const char **, int); extern int diff_setup_done(struct diff_options *); extern void diffcore_std(struct diff_options *); extern void diff_flush(struct diff_options*); /* diff-raw status letters */ #define DIFF_STATUS_ADDED 'A' #define DIFF_STATUS_COPIED 'C' #define DIFF_STATUS_DELETED 'D' #define DIFF_STATUS_MODIFIED 'M' #define DIFF_STATUS_RENAMED 'R' #define DIFF_STATUS_TYPE_CHANGED 'T' #define DIFF_STATUS_UNKNOWN 'X' #define DIFF_STATUS_UNMERGED 'U' /* * from git:refs.g */ typedef int each_ref_fn(const char *refname, const unsigned char *sha1, int flags, void *cb_data); extern int head_ref(each_ref_fn, void *); extern int for_each_ref(each_ref_fn, void *); extern int for_each_tag_ref(each_ref_fn, void *); extern int for_each_branch_ref(each_ref_fn, void *); extern int for_each_remote_ref(each_ref_fn, void *); /* * from git:revision.h */ struct rev_info; struct log_info; typedef void (prune_fn_t)(struct rev_info *revs, struct commit *commit); struct rev_info { /* Starting list */ struct commit_list *commits; struct object_array pending; /* Basic information */ const char *prefix; void *prune_data; prune_fn_t *prune_fn; /* Traversal flags */ unsigned int dense:1, no_merges:1, no_walk:1, remove_empty_trees:1, simplify_history:1, lifo:1, topo_order:1, tag_objects:1, tree_objects:1, blob_objects:1, edge_hint:1, limited:1, unpacked:1, /* see also ignore_packed below */ boundary:1, parents:1; /* Diff flags */ unsigned int diff:1, full_diff:1, show_root_diff:1, no_commit_id:1, verbose_header:1, ignore_merges:1, combine_merges:1, dense_combined_merges:1, always_show_header:1; /* Format info */ unsigned int shown_one:1, abbrev_commit:1, relative_date:1; const char **ignore_packed; /* pretend objects in these are unpacked */ int num_ignore_packed; unsigned int abbrev; enum cmit_fmt commit_format; struct log_info *loginfo; int nr, total; const char *mime_boundary; const char *message_id; const char *ref_message_id; const char *add_signoff; const char *extra_headers; /* Filter by commit log message */ struct grep_opt *grep_filter; /* special limits */ int max_count; unsigned long max_age; unsigned long min_age; /* diff info for patches and for paths limiting */ struct diff_options diffopt; struct diff_options pruning; topo_sort_set_fn_t topo_setter; topo_sort_get_fn_t topo_getter; }; extern void init_revisions(struct rev_info *revs, const char *prefix); extern int setup_revisions(int argc, const char **argv, struct rev_info *revs, const char *def); extern int handle_revision_arg(const char *arg, struct rev_info *revs,int flags,int cant_be_filename); extern void prepare_revision_walk(struct rev_info *revs); extern struct commit *get_revision(struct rev_info *revs); /* from git:log-tree.h */ int log_tree_commit(struct rev_info *, struct commit *); #endif /* GIT_H */