17 files changed, 309 insertions, 172 deletions

diff --git a/cgit.c b/cgit.c
index 38bc136..ab25b6a 100644
--- a/cgit.c
+++ b/cgit.c
@@ -258,6 +258,8 @@ static void querystring_cb(const char *name, const char *value)
                 ctx.qry.ssdiff = atoi(value);
         } else if (!strcmp(name, "all")) {
                 ctx.qry.show_all = atoi(value);
+        } else if (!strcmp(name, "context")) {
+                ctx.qry.context = atoi(value);
         }
 }
 
@@ -433,6 +435,12 @@ static void process_request(void *cbdata)
                 return;
         }
 
+        /* If cmd->want_vpath is set, assume ctx->qry.path contains a "virtual"
+         * in-project path limit to be made available at ctx->qry.vpath.
+         * Otherwise, no path limit is in effect (ctx->qry.vpath = NULL).
+         */
+        ctx->qry.vpath = cmd->want_vpath ? ctx->qry.path : NULL;
+
         if (cmd->want_repo && !ctx->repo) {
                 cgit_print_http_headers(ctx);
                 cgit_print_docstart(ctx);
diff --git a/cgit.css b/cgit.css
index 6198403..6e47eb3 100644
--- a/cgit.css
+++ b/cgit.css
@@ -64,7 +64,7 @@ table#header td.sub {
 }
 
 table.tabs {
-        /* border-bottom: solid 2px #ccc; */
+        border-bottom: solid 3px #ccc;
         border-collapse: collapse;
         margin-top: 2em;
         margin-bottom: 0px;
@@ -102,10 +102,16 @@ table.tabs td.form select {
         font-size: 90%;
 }
 
+div.path {
+        margin: 0px;
+        padding: 5px 2em 2px 2em;
+        color: #000;
+        background-color: #eee;
+}
+
 div.content {
         margin: 0px;
         padding: 2em;
-        border-top: solid 3px #ccc;
         border-bottom: solid 3px #ccc;
 }
 
diff --git a/cgit.h b/cgit.h
index 8884f9e..2b28d63 100644
--- a/cgit.h
+++ b/cgit.h
@@ -147,6 +147,8 @@ struct cgit_query {
         int showmsg;
         int ssdiff;
         int show_all;
+        int context;
+        char *vpath;
 };
 
 struct cgit_config {
@@ -277,7 +279,7 @@ extern void *cgit_free_commitinfo(struct commitinfo *info);
 extern int cgit_diff_files(const unsigned char *old_sha1,
                            const unsigned char *new_sha1,
                            unsigned long *old_size, unsigned long *new_size,
-                           int *binary, linediff_fn fn);
+                           int *binary, int context, linediff_fn fn);
 
 extern void cgit_diff_tree(const unsigned char *old_sha1,
                            const unsigned char *new_sha1,
diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index 5c24381..a853522 100644
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -444,7 +444,7 @@ snapshots=tar.gz tar.bz2 zip
 ## List of common mimetypes
 ##
 
-mimetype.git=image/git
+mimetype.gif=image/gif
 mimetype.html=text/html
 mimetype.jpg=image/jpeg
 mimetype.jpeg=image/jpeg
diff --git a/cmd.c b/cmd.c
index ad784fc..6dc9f5e 100644
--- a/cmd.c
+++ b/cmd.c
@@ -51,7 +51,7 @@ static void blob_fn(struct cgit_context *ctx)
 
 static void commit_fn(struct cgit_context *ctx)
 {
-        cgit_print_commit(ctx->qry.sha1);
+        cgit_print_commit(ctx->qry.sha1, ctx->qry.path);
 }
 
 static void diff_fn(struct cgit_context *ctx)
@@ -90,7 +90,7 @@ static void repolist_fn(struct cgit_context *ctx)
 
 static void patch_fn(struct cgit_context *ctx)
 {
-        cgit_print_patch(ctx->qry.sha1);
+        cgit_print_patch(ctx->qry.sha1, ctx->qry.path);
 }
 
 static void plain_fn(struct cgit_context *ctx)
@@ -129,31 +129,31 @@ static void tree_fn(struct cgit_context *ctx)
         cgit_print_tree(ctx->qry.sha1, ctx->qry.path);
 }
 
-#define def_cmd(name, want_repo, want_layout) \
-        {#name, name##_fn, want_repo, want_layout}
+#define def_cmd(name, want_repo, want_layout, want_vpath) \
+        {#name, name##_fn, want_repo, want_layout, want_vpath}
 
 struct cgit_cmd *cgit_get_cmd(struct cgit_context *ctx)
 {
         static struct cgit_cmd cmds[] = {
-                def_cmd(HEAD, 1, 0),
-                def_cmd(atom, 1, 0),
-                def_cmd(about, 0, 1),
-                def_cmd(blob, 1, 0),
-                def_cmd(commit, 1, 1),
-                def_cmd(diff, 1, 1),
-                def_cmd(info, 1, 0),
-                def_cmd(log, 1, 1),
-                def_cmd(ls_cache, 0, 0),
-                def_cmd(objects, 1, 0),
-                def_cmd(patch, 1, 0),
-                def_cmd(plain, 1, 0),
-                def_cmd(refs, 1, 1),
-                def_cmd(repolist, 0, 0),
-                def_cmd(snapshot, 1, 0),
-                def_cmd(stats, 1, 1),
-                def_cmd(summary, 1, 1),
-                def_cmd(tag, 1, 1),
-                def_cmd(tree, 1, 1),
+                def_cmd(HEAD, 1, 0, 0),
+                def_cmd(atom, 1, 0, 0),
+                def_cmd(about, 0, 1, 0),
+                def_cmd(blob, 1, 0, 0),
+                def_cmd(commit, 1, 1, 1),
+                def_cmd(diff, 1, 1, 1),
+                def_cmd(info, 1, 0, 0),
+                def_cmd(log, 1, 1, 1),
+                def_cmd(ls_cache, 0, 0, 0),
+                def_cmd(objects, 1, 0, 0),
+                def_cmd(patch, 1, 0, 1),
+                def_cmd(plain, 1, 0, 0),
+                def_cmd(refs, 1, 1, 0),
+                def_cmd(repolist, 0, 0, 0),
+                def_cmd(snapshot, 1, 0, 0),
+                def_cmd(stats, 1, 1, 1),
+                def_cmd(summary, 1, 1, 0),
+                def_cmd(tag, 1, 1, 0),
+                def_cmd(tree, 1, 1, 1),
         };
         int i;
 
diff --git a/cmd.h b/cmd.h
index ec9e691..8dc01bd 100644
--- a/cmd.h
+++ b/cmd.h
@@ -7,7 +7,8 @@ struct cgit_cmd {
         const char *name;
         cgit_cmd_fn fn;
         unsigned int want_repo:1,
-                want_layout:1;
+                want_layout:1,
+                want_vpath:1;
 };
 
 extern struct cgit_cmd *cgit_get_cmd(struct cgit_context *ctx);
diff --git a/shared.c b/shared.c
index 8b3a045..06f70bb 100644
--- a/shared.c
+++ b/shared.c
@@ -10,7 +10,6 @@
 
 struct cgit_repolist cgit_repolist;
 struct cgit_context ctx;
-int cgit_cmd;
 
 int chk_zero(int result, char *msg)
 {
@@ -264,7 +263,8 @@ int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
 
 int cgit_diff_files(const unsigned char *old_sha1,
                     const unsigned char *new_sha1, unsigned long *old_size,
-                    unsigned long *new_size, int *binary, linediff_fn fn)
+                    unsigned long *new_size, int *binary, int context,
+                    linediff_fn fn)
 {
         mmfile_t file1, file2;
         xpparam_t diff_params;
@@ -291,7 +291,7 @@ int cgit_diff_files(const unsigned char *old_sha1,
         memset(&emit_params, 0, sizeof(emit_params));
         memset(&emit_cb, 0, sizeof(emit_cb));
         diff_params.flags = XDF_NEED_MINIMAL;
-        emit_params.ctxlen = 3;
+        emit_params.ctxlen = context > 0 ? context : 3;
         emit_params.flags = XDL_EMIT_FUNCNAMES;
         emit_cb.outf = filediff_cb;
         emit_cb.priv = fn;
diff --git a/ui-commit.c b/ui-commit.c
index 41313b9..a11bc5f 100644
--- a/ui-commit.c
+++ b/ui-commit.c
@@ -12,7 +12,7 @@
 #include "ui-diff.h"
 #include "ui-log.h"
 
-void cgit_print_commit(char *hex)
+void cgit_print_commit(char *hex, const char *prefix)
 {
         struct commit *commit, *parent;
         struct commitinfo *info, *parent_info;
@@ -58,19 +58,23 @@ void cgit_print_commit(char *hex)
         html("</td></tr>\n");
         html("<tr><th>commit</th><td colspan='2' class='sha1'>");
         tmp = sha1_to_hex(commit->object.sha1);
-        cgit_commit_link(tmp, NULL, NULL, ctx.qry.head, tmp, 0);
+        cgit_commit_link(tmp, NULL, NULL, ctx.qry.head, tmp, prefix, 0);
         html(" (");
-        cgit_patch_link("patch", NULL, NULL, NULL, tmp);
+        cgit_patch_link("patch", NULL, NULL, NULL, tmp, prefix);
         html(") (");
         if ((ctx.qry.ssdiff && !ctx.cfg.ssdiff) || (!ctx.qry.ssdiff && ctx.cfg.ssdiff))
-                cgit_commit_link("unidiff", NULL, NULL, ctx.qry.head, tmp, 1);
+                cgit_commit_link("unidiff", NULL, NULL, ctx.qry.head, tmp, prefix, 1);
         else
-                cgit_commit_link("side-by-side diff", NULL, NULL, ctx.qry.head, tmp, 1);
+                cgit_commit_link("side-by-side diff", NULL, NULL, ctx.qry.head, tmp, prefix, 1);
         html(")</td></tr>\n");
         html("<tr><th>tree</th><td colspan='2' class='sha1'>");
         tmp = xstrdup(hex);
         cgit_tree_link(sha1_to_hex(commit->tree->object.sha1), NULL, NULL,
                        ctx.qry.head, tmp, NULL);
+        if (prefix) {
+                html(" /");
+                cgit_tree_link(prefix, NULL, NULL, ctx.qry.head, tmp, prefix);
+        }
         html("</td></tr>\n");
         for (p = commit->parents; p ; p = p->next) {
                 parent = lookup_commit_reference(p->item->object.sha1);
@@ -87,10 +91,10 @@ void cgit_print_commit(char *hex)
                         parent_info = cgit_parse_commit(parent);
                         tmp2 = parent_info->subject;
                 }
-                cgit_commit_link(tmp2, NULL, NULL, ctx.qry.head, tmp, 0);
+                cgit_commit_link(tmp2, NULL, NULL, ctx.qry.head, tmp, prefix, 0);
                 html(" (");
                 cgit_diff_link("diff", NULL, NULL, ctx.qry.head, hex,
-                               sha1_to_hex(p->item->object.sha1), NULL, 0);
+                               sha1_to_hex(p->item->object.sha1), prefix, 0);
                 html(")</td></tr>");
                 parents++;
         }
@@ -121,7 +125,7 @@ void cgit_print_commit(char *hex)
                         tmp = sha1_to_hex(commit->parents->item->object.sha1);
                 else
                         tmp = NULL;
-                cgit_print_diff(ctx.qry.sha1, tmp, NULL);
+                cgit_print_diff(ctx.qry.sha1, tmp, prefix);
         }
         cgit_free_commitinfo(info);
 }
diff --git a/ui-commit.h b/ui-commit.h
index 40bcb31..8198b4b 100644
--- a/ui-commit.h
+++ b/ui-commit.h
@@ -1,6 +1,6 @@
 #ifndef UI_COMMIT_H
 #define UI_COMMIT_H
 
-extern void cgit_print_commit(char *hex);
+extern void cgit_print_commit(char *hex, const char *prefix);
 
 #endif /* UI_COMMIT_H */
diff --git a/ui-diff.c b/ui-diff.c
index a92a768..e0a72f7 100644
--- a/ui-diff.c
+++ b/ui-diff.c
@@ -127,7 +127,7 @@ static void inspect_filepair(struct diff_filepair *pair)
         lines_added = 0;
         lines_removed = 0;
         cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size, &new_size,
-                        &binary, count_diff_lines);
+                        &binary, 0, count_diff_lines);
         if (files >= slots) {
                 if (slots == 0)
                         slots = 4;
@@ -154,17 +154,27 @@ static void inspect_filepair(struct diff_filepair *pair)
 }
 
 void cgit_print_diffstat(const unsigned char *old_sha1,
-                         const unsigned char *new_sha1)
+                         const unsigned char *new_sha1, const char *prefix)
 {
-        int i;
+        int i, save_context = ctx.qry.context;
 
         html("<div class='diffstat-header'>");
         cgit_diff_link("Diffstat", NULL, NULL, ctx.qry.head, ctx.qry.sha1,
                        ctx.qry.sha2, NULL, 0);
+        if (prefix)
+                htmlf(" (limited to '%s')", prefix);
+        html(" (");
+        ctx.qry.context = (save_context > 0 ? save_context : 3) << 1;
+        cgit_self_link("more", NULL, NULL, &ctx);
+        html("/");
+        ctx.qry.context = (save_context > 3 ? save_context : 3) >> 1;
+        cgit_self_link("less", NULL, NULL, &ctx);
+        ctx.qry.context = save_context;
+        html(" context)");
         html("</div>");
         html("<table summary='diffstat' class='diffstat'>");
         max_changes = 0;
-        cgit_diff_tree(old_sha1, new_sha1, inspect_filepair, NULL);
+        cgit_diff_tree(old_sha1, new_sha1, inspect_filepair, prefix);
         for(i = 0; i<files; i++)
                 print_fileinfo(&items[i]);
         html("</table>");
@@ -286,7 +296,7 @@ static void filepair_cb(struct diff_filepair *pair)
                 return;
         }
         if (cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size,
-                            &new_size, &binary, print_line_fn))
+                            &new_size, &binary, ctx.qry.context, print_line_fn))
                 cgit_print_error("Error running diff");
         if (binary) {
                 if (use_ssdiff)
@@ -338,7 +348,7 @@ void cgit_print_diff(const char *new_rev, const char *old_rev, const char *prefi
                 use_ssdiff = 1;
 
         print_ssdiff_link();
-        cgit_print_diffstat(old_rev_sha1, new_rev_sha1);
+        cgit_print_diffstat(old_rev_sha1, new_rev_sha1, prefix);
 
         if (use_ssdiff) {
                 html("<table summary='ssdiff' class='ssdiff'>");
diff --git a/ui-log.c b/ui-log.c
index 4441d1d..33ec8a9 100644
--- a/ui-log.c
+++ b/ui-log.c
@@ -33,7 +33,7 @@ void inspect_files(struct diff_filepair *pair)
         files++;
         if (ctx.repo->enable_log_linecount)
                 cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size,
-                                &new_size, &binary, count_lines);
+                                &new_size, &binary, 0, count_lines);
 }
 
 void show_commit_decorations(struct commit *commit)
@@ -46,8 +46,9 @@ void show_commit_decorations(struct commit *commit)
         while (deco) {
                 if (!prefixcmp(deco->name, "refs/heads/")) {
                         strncpy(buf, deco->name + 11, sizeof(buf) - 1);
-                        cgit_log_link(buf, NULL, "branch-deco", buf, NULL, NULL,
-                                0, NULL, NULL, ctx.qry.showmsg);
+                        cgit_log_link(buf, NULL, "branch-deco", buf, NULL,
+                                      ctx.qry.vpath, 0, NULL, NULL,
+                                      ctx.qry.showmsg);
                 }
                 else if (!prefixcmp(deco->name, "tag: refs/tags/")) {
                         strncpy(buf, deco->name + 15, sizeof(buf) - 1);
@@ -60,13 +61,15 @@ void show_commit_decorations(struct commit *commit)
                 else if (!prefixcmp(deco->name, "refs/remotes/")) {
                         strncpy(buf, deco->name + 13, sizeof(buf) - 1);
                         cgit_log_link(buf, NULL, "remote-deco", NULL,
-                                sha1_to_hex(commit->object.sha1), NULL,
-                                0, NULL, NULL, ctx.qry.showmsg);
+                                      sha1_to_hex(commit->object.sha1),
+                                      ctx.qry.vpath, 0, NULL, NULL,
+                                      ctx.qry.showmsg);
                 }
                 else {
                         strncpy(buf, deco->name, sizeof(buf) - 1);
                         cgit_commit_link(buf, NULL, "deco", ctx.qry.head,
-                                sha1_to_hex(commit->object.sha1), 0);
+                                         sha1_to_hex(commit->object.sha1),
+                                         ctx.qry.vpath, 0);
                 }
                 deco = deco->next;
         }
@@ -82,14 +85,14 @@ void print_commit(struct commit *commit)
         htmlf("<tr%s><td>",
                 ctx.qry.showmsg ? " class='logheader'" : "");
         tmp = fmt("id=%s", sha1_to_hex(commit->object.sha1));
-        tmp = cgit_pageurl(ctx.repo->url, "commit", tmp);
+        tmp = cgit_fileurl(ctx.repo->url, "commit", ctx.qry.vpath, tmp);
         html_link_open(tmp, NULL, NULL);
         cgit_print_age(commit->date, TM_WEEK * 2, FMT_SHORTDATE);
         html_link_close();
         htmlf("</td><td%s>",
                 ctx.qry.showmsg ? " class='logsubject'" : "");
         cgit_commit_link(info->subject, NULL, NULL, ctx.qry.head,
-                         sha1_to_hex(commit->object.sha1), 0);
+                         sha1_to_hex(commit->object.sha1), ctx.qry.vpath, 0);
         show_commit_decorations(commit);
         html("</td><td>");
         html_txt(info->author);
@@ -179,7 +182,7 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern
                 html(" (");
                 cgit_log_link(ctx.qry.showmsg ? "Collapse" : "Expand", NULL,
                               NULL, ctx.qry.head, ctx.qry.sha1,
-                              ctx.qry.path, ctx.qry.ofs, ctx.qry.grep,
+                              ctx.qry.vpath, ctx.qry.ofs, ctx.qry.grep,
                               ctx.qry.search, ctx.qry.showmsg ? 0 : 1);
                 html(")");
         }
@@ -216,22 +219,22 @@ void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *pattern
                      columns);
                 if (ofs > 0) {
                         cgit_log_link("[prev]", NULL, NULL, ctx.qry.head,
-                                      ctx.qry.sha1, ctx.qry.path,
+                                      ctx.qry.sha1, ctx.qry.vpath,
                                       ofs - cnt, ctx.qry.grep,
                                       ctx.qry.search, ctx.qry.showmsg);
                         html("&nbsp;");
                 }
                 if ((commit = get_revision(&rev)) != NULL) {
                         cgit_log_link("[next]", NULL, NULL, ctx.qry.head,
-                                      ctx.qry.sha1, ctx.qry.path,
+                                      ctx.qry.sha1, ctx.qry.vpath,
                                       ofs + cnt, ctx.qry.grep,
                                       ctx.qry.search, ctx.qry.showmsg);
                 }
                 html("</div>");
         } else if ((commit = get_revision(&rev)) != NULL) {
                 html("<tr class='nohover'><td colspan='3'>");
-                cgit_log_link("[...]", NULL, NULL, ctx.qry.head, NULL, NULL, 0,
-                              NULL, NULL, ctx.qry.showmsg);
+                cgit_log_link("[...]", NULL, NULL, ctx.qry.head, NULL,
+                              ctx.qry.vpath, 0, NULL, NULL, ctx.qry.showmsg);
                 html("</td></tr>\n");
         }
 }
diff --git a/ui-patch.c b/ui-patch.c
index 2a8f7a5..d13104c 100644
--- a/ui-patch.c
+++ b/ui-patch.c
@@ -71,13 +71,13 @@ static void filepair_cb(struct diff_filepair *pair)
                 return;
         }
         if (cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size,
-                            &new_size, &binary, print_line))
+                            &new_size, &binary, 0, print_line))