cgitsb/ui-blame.c
Jeff Smith dbaee2672b ui-blame: Allow syntax highlighting
Place file contents into a single block so that syntax highlighting can
be applied in the usual fashion.  Place the alternating color bars
behind the file contents.  Force the default syntax highlighting
background to transparent.

Signed-off-by: Jeff Smith <whydoubt@gmail.com>
Reviewed-by: John Keeping <john@keeping.me.uk>
2018-01-19 11:40:58 +01:00

299 sor
7.3 KiB
C

/* ui-blame.c: functions for blame output
*
* Copyright (C) 2006-2017 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-blame.h"
#include "html.h"
#include "ui-shared.h"
#include "argv-array.h"
#include "blame.h"
static char *emit_suspect_detail(struct blame_origin *suspect)
{
struct commitinfo *info;
struct strbuf detail = STRBUF_INIT;
info = cgit_parse_commit(suspect->commit);
strbuf_addf(&detail, "author %s", info->author);
if (!ctx.cfg.noplainemail)
strbuf_addf(&detail, " %s", info->author_email);
strbuf_addf(&detail, " %s\n",
show_date(info->author_date, info->author_tz,
cgit_date_mode(DATE_ISO8601)));
strbuf_addf(&detail, "committer %s", info->committer);
if (!ctx.cfg.noplainemail)
strbuf_addf(&detail, " %s", info->committer_email);
strbuf_addf(&detail, " %s\n\n",
show_date(info->committer_date, info->committer_tz,
cgit_date_mode(DATE_ISO8601)));
strbuf_addstr(&detail, info->subject);
cgit_free_commitinfo(info);
return strbuf_detach(&detail, NULL);
}
static void emit_blame_entry_hash(struct blame_entry *ent)
{
struct blame_origin *suspect = ent->suspect;
struct object_id *oid = &suspect->commit->object.oid;
unsigned long line = 0;
char *detail = emit_suspect_detail(suspect);
html("<span class='sha1'>");
cgit_commit_link(find_unique_abbrev(oid->hash, DEFAULT_ABBREV), detail,
NULL, ctx.qry.head, oid_to_hex(oid), suspect->path);
html("</span>");
free(detail);
while (line++ < ent->num_lines)
html("\n");
}
static void emit_blame_entry_linenumber(struct blame_entry *ent)
{
const char *numberfmt = "<a id='n%1$d' href='#n%1$d'>%1$d</a>\n";
unsigned long lineno = ent->lno;
while (lineno < ent->lno + ent->num_lines)
htmlf(numberfmt, ++lineno);
}
static void emit_blame_entry_line_background(struct blame_scoreboard *sb,
struct blame_entry *ent)
{
unsigned long line;
size_t len, maxlen = 2;
const char* pos, *endpos;
for (line = ent->lno; line < ent->lno + ent->num_lines; line++) {
html("\n");
pos = blame_nth_line(sb, line);
endpos = blame_nth_line(sb, line + 1);
len = 0;
while (pos < endpos) {
len++;
if (*pos++ == '\t')
len = (len + 7) & ~7;
}
if (len > maxlen)
maxlen = len;
}
for (len = 0; len < maxlen - 1; len++)
html(" ");
}
struct walk_tree_context {
char *curr_rev;
int match_baselen;
int state;
};
static void print_object(const unsigned char *sha1, const char *path,
const char *basename, const char *rev)
{
enum object_type type;
char *buf;
unsigned long size;
struct argv_array rev_argv = ARGV_ARRAY_INIT;
struct rev_info revs;
struct blame_scoreboard sb;
struct blame_origin *o;
struct blame_entry *ent = NULL;
type = sha1_object_info(sha1, &size);
if (type == OBJ_BAD) {
cgit_print_error_page(404, "Not found", "Bad object name: %s",
sha1_to_hex(sha1));
return;
}
buf = read_sha1_file(sha1, &type, &size);
if (!buf) {
cgit_print_error_page(500, "Internal server error",
"Error reading object %s", sha1_to_hex(sha1));
return;
}
argv_array_push(&rev_argv, "blame");
argv_array_push(&rev_argv, rev);
init_revisions(&revs, NULL);
revs.diffopt.flags.allow_textconv = 1;
setup_revisions(rev_argv.argc, rev_argv.argv, &revs, NULL);
init_scoreboard(&sb);
sb.revs = &revs;
setup_scoreboard(&sb, path, &o);
o->suspects = blame_entry_prepend(NULL, 0, sb.num_lines, o);
prio_queue_put(&sb.commits, o->commit);
blame_origin_decref(o);
sb.ent = NULL;
sb.path = path;
assign_blame(&sb, 0);
blame_sort_final(&sb);
blame_coalesce(&sb);
cgit_set_title_from_path(path);
cgit_print_layout_start();
htmlf("blob: %s (", sha1_to_hex(sha1));
cgit_plain_link("plain", NULL, NULL, ctx.qry.head, rev, path);
html(") (");
cgit_tree_link("tree", NULL, NULL, ctx.qry.head, rev, path);
html(")\n");
if (ctx.cfg.max_blob_size && size / 1024 > ctx.cfg.max_blob_size) {
htmlf("<div class='error'>blob size (%ldKB)"
" exceeds display size limit (%dKB).</div>",
size / 1024, ctx.cfg.max_blob_size);
return;
}
html("<table class='blame blob'>\n<tr>\n");
/* Commit hashes */
html("<td class='hashes'>");
for (ent = sb.ent; ent; ent = ent->next) {
html("<div class='alt'><pre>");
emit_blame_entry_hash(ent);
html("</pre></div>");
}
html("</td>\n");
/* Line numbers */
if (ctx.cfg.enable_tree_linenumbers) {
html("<td class='linenumbers'>");
for (ent = sb.ent; ent; ent = ent->next) {
html("<div class='alt'><pre>");
emit_blame_entry_linenumber(ent);
html("</pre></div>");
}
html("</td>\n");
}
html("<td class='lines'><div>");
/* Colored bars behind lines */
html("<div>");
for (ent = sb.ent; ent; ) {
struct blame_entry *e = ent->next;
html("<div class='alt'><pre>");
emit_blame_entry_line_background(&sb, ent);
html("</pre></div>");
free(ent);
ent = e;
}
html("</div>");
free((void *)sb.final_buf);
/* Lines */
html("<pre><code>");
if (ctx.repo->source_filter) {
char *filter_arg = xstrdup(basename);
cgit_open_filter(ctx.repo->source_filter, filter_arg);
html_raw(buf, size);
cgit_close_filter(ctx.repo->source_filter);
free(filter_arg);
} else {
html_txt(buf);
}
html("</code></pre>");
html("</div></td>\n");
html("</tr>\n</table>\n");
cgit_print_layout_end();
}
static int walk_tree(const unsigned char *sha1, struct strbuf *base,
const char *pathname, unsigned mode, int stage,
void *cbdata)
{
struct walk_tree_context *walk_tree_ctx = cbdata;
if (base->len == walk_tree_ctx->match_baselen) {
if (S_ISREG(mode)) {
struct strbuf buffer = STRBUF_INIT;
strbuf_addbuf(&buffer, base);
strbuf_addstr(&buffer, pathname);
print_object(sha1, buffer.buf, pathname,
walk_tree_ctx->curr_rev);
strbuf_release(&buffer);
walk_tree_ctx->state = 1;
} else if (S_ISDIR(mode)) {
walk_tree_ctx->state = 2;
}
} else if (base->len < INT_MAX
&& (int)base->len > walk_tree_ctx->match_baselen) {
walk_tree_ctx->state = 2;
} else if (S_ISDIR(mode)) {
return READ_TREE_RECURSIVE;
}
return 0;
}
static int basedir_len(const char *path)
{
char *p = strrchr(path, '/');
if (p)
return p - path + 1;
return 0;
}
void cgit_print_blame(void)
{
const char *rev = ctx.qry.sha1;
struct object_id oid;
struct commit *commit;
struct pathspec_item path_items = {
.match = ctx.qry.path,
.len = ctx.qry.path ? strlen(ctx.qry.path) : 0
};
struct pathspec paths = {
.nr = 1,
.items = &path_items
};
struct walk_tree_context walk_tree_ctx = {
.state = 0
};
if (!rev)
rev = ctx.qry.head;
if (get_oid(rev, &oid)) {
cgit_print_error_page(404, "Not found",
"Invalid revision name: %s", rev);
return;
}
commit = lookup_commit_reference(&oid);
if (!commit || parse_commit(commit)) {
cgit_print_error_page(404, "Not found",
"Invalid commit reference: %s", rev);
return;
}
walk_tree_ctx.curr_rev = xstrdup(rev);
walk_tree_ctx.match_baselen = (path_items.match) ?
basedir_len(path_items.match) : -1;
read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree,
&walk_tree_ctx);
if (!walk_tree_ctx.state)
cgit_print_error_page(404, "Not found", "Not found");
else if (walk_tree_ctx.state == 2)
cgit_print_error_page(404, "No blame for folders",
"Blame is not available for folders.");
free(walk_tree_ctx.curr_rev);
}