gitweb: Add a feature to show side-by-side diff

diff --git a/list-objects.c b/list-objects.c
index 44fa5a92e29815cbee54f9954c2ceac8e1262811..39d80c01753527e45716ec762beeb891dfc7d28d 100644 (file)
--- a/list-objects.c
+++ b/list-objects.c
@@ -12,7 +12,8 @@ static void process_blob(struct rev_info *revs,
                         struct blob *blob,
                         show_object_fn show,
                         struct name_path *path,
-                        const char *name)
+                        const char *name,
+                        void *cb_data)
 {
        struct object *obj = &blob->object;
 
@@ -23,7 +24,7 @@ static void process_blob(struct rev_info *revs,
        if (obj->flags & (UNINTERESTING | SEEN))
                return;
        obj->flags |= SEEN;
-       show(obj, path, name);
+       show(obj, path, name, cb_data);
 }
 
 /*
@@ -52,7 +53,8 @@ static void process_gitlink(struct rev_info *revs,
                            const unsigned char *sha1,
                            show_object_fn show,
                            struct name_path *path,
-                           const char *name)
+                           const char *name,
+                           void *cb_data)
 {
        /* Nothing to do */
 }
@@ -61,12 +63,16 @@ static void process_tree(struct rev_info *revs,
                         struct tree *tree,
                         show_object_fn show,
                         struct name_path *path,
-                        const char *name)
+                        struct strbuf *base,
+                        const char *name,
+                        void *cb_data)
 {
        struct object *obj = &tree->object;
        struct tree_desc desc;
        struct name_entry entry;
        struct name_path me;
+       int match = revs->diffopt.pathspec.nr == 0 ? 2 : 0;
+       int baselen = base->len;
 
        if (!revs->tree_objects)
                return;
@@ -77,26 +83,45 @@ static void process_tree(struct rev_info *revs,
        if (parse_tree(tree) < 0)
                die("bad tree object %s", sha1_to_hex(obj->sha1));
        obj->flags |= SEEN;
-       show(obj, path, name);
+       show(obj, path, name, cb_data);
        me.up = path;
        me.elem = name;
        me.elem_len = strlen(name);
 
+       if (!match) {
+               strbuf_addstr(base, name);
+               if (base->len)
+                       strbuf_addch(base, '/');
+       }
+
        init_tree_desc(&desc, tree->buffer, tree->size);
 
        while (tree_entry(&desc, &entry)) {
+               if (match != 2) {
+                       match = tree_entry_interesting(&entry, base, 0,
+                                                      &revs->diffopt.pathspec);
+                       if (match < 0)
+                               break;
+                       if (match == 0)
+                               continue;
+               }
+
                if (S_ISDIR(entry.mode))
                        process_tree(revs,
                                     lookup_tree(entry.sha1),
-                                    show, &me, entry.path);
+                                    show, &me, base, entry.path,
+                                    cb_data);
                else if (S_ISGITLINK(entry.mode))
                        process_gitlink(revs, entry.sha1,
-                                       show, &me, entry.path);
+                                       show, &me, entry.path,
+                                       cb_data);
                else
                        process_blob(revs,
                                     lookup_blob(entry.sha1),
-                                    show, &me, entry.path);
+                                    show, &me, entry.path,
+                                    cb_data);
        }
+       strbuf_setlen(base, baselen);
        free(tree->buffer);
        tree->buffer = NULL;
 }
@@ -146,7 +171,9 @@ void traverse_commit_list(struct rev_info *revs,
 {
        int i;
        struct commit *commit;
+       struct strbuf base;
 
+       strbuf_init(&base, PATH_MAX);
        while ((commit = get_revision(revs)) != NULL) {
                /*
                 * an uninteresting boundary commit may not have its tree
@@ -164,17 +191,17 @@ void traverse_commit_list(struct rev_info *revs,
                        continue;
                if (obj->type == OBJ_TAG) {
                        obj->flags |= SEEN;
-                       show_object(obj, NULL, name);
+                       show_object(obj, NULL, name, data);
                        continue;
                }
                if (obj->type == OBJ_TREE) {
                        process_tree(revs, (struct tree *)obj, show_object,
-                                    NULL, name);
+                                    NULL, &base, name, data);
                        continue;
                }
                if (obj->type == OBJ_BLOB) {
                        process_blob(revs, (struct blob *)obj, show_object,
-                                    NULL, name);
+                                    NULL, name, data);
                        continue;
                }
                die("unknown pending object %s (%s)",
@@ -186,4 +213,5 @@ void traverse_commit_list(struct rev_info *revs,
                revs->pending.alloc = 0;
                revs->pending.objects = NULL;
        }
+       strbuf_release(&base);
 }