From: Olivier Matz <zer0@droids-corp.org>
Date: Sun, 8 May 2011 16:00:54 +0000 (+0200)
Subject: genconf: basic support of completion for nodes starting with "//"
X-Git-Url: http://git.droids-corp.org/?p=libcmdline.git;a=commitdiff_plain;h=09addaa3b831267407b6f4a51dfaa4597d5da0a6

genconf: basic support of completion for nodes starting with "//"

Signed-off-by: Olivier Matz <zer0@droids-corp.org>
---

diff --git a/src/genconf/parse_confnode.c b/src/genconf/parse_confnode.c
index 382bfde..562e688 100644
--- a/src/genconf/parse_confnode.c
+++ b/src/genconf/parse_confnode.c
@@ -118,6 +118,8 @@ parse_conf_node(cmdline_parse_token_hdr_t *tk, const char *buf, void *res,
 					 tkd->mask, 1);
 		else {
 			n = conf_htable_lookup(token + 2);
+			if (n == NULL)
+				return -1;
 			if ((n->flags & tkd->mask) != tkd->flags)
 				return -1;
 			TAILQ_INSERT_TAIL(&l, n, user_next);
@@ -139,15 +141,17 @@ parse_conf_node(cmdline_parse_token_hdr_t *tk, const char *buf, void *res,
 struct confnode_complete_callback {
 	struct confnode *start;
 	struct confnode *cur;
+	int xpath;
 };
 
 
 static struct confnode *get_next_node(struct confnode *start,
 				      struct confnode *cur, unsigned flags,
-				      unsigned mask)
+				      unsigned mask, int xpath)
 {
 	struct confnode *prev;
 	struct confnode *parent = start;
+	int descend = 1;
 
 	while (1) {
 		prev = cur;
@@ -159,14 +163,22 @@ static struct confnode *get_next_node(struct confnode *start,
 		/* first iteration */
 		if (cur == NULL)
 			cur = TAILQ_FIRST(&parent->children);
+		/* directory in xpath mode */
+		else if (xpath && descend &&
+			 (cur->flags & CONFNODE_F_IS_DIR) &&
+			 (cur->flags & CONFNODE_F_INVISIBLE) == 0)
+			cur = TAILQ_FIRST(&cur->children);
+		/* other cases */
 		else
 			cur = TAILQ_NEXT(cur, next);
+		descend = 1;
 
 		/* no next, return to upper level */
 		if (cur == NULL) {
 			if (prev == NULL)
 				return NULL; /* no node */
 			cur = prev->parent;
+			descend = 0;
 			continue;
 		}
 
@@ -177,6 +189,10 @@ static struct confnode *get_next_node(struct confnode *start,
 			continue;
 		}
 
+		/* skip other nodes with no name */
+		if (cur->flags & CONFNODE_F_NO_NAME)
+			continue;
+
 		/* check that flags match what we want */
 		if ((cur->flags & mask) != flags)
 			continue;
@@ -194,7 +210,7 @@ complete_conf_node_start(cmdline_parse_token_hdr_t *tk,
 	struct token_conf_node *tk2 = (struct token_conf_node *)tk;
 	struct token_conf_node_data *tkd = &tk2->conf_node_data;
 	struct confnode_complete_callback *cb;
-	struct confnode *n;
+	struct confnode *n, *start;
 	unsigned flags = tkd->flags;
 	unsigned mask = tkd->mask;
 
@@ -204,11 +220,23 @@ complete_conf_node_start(cmdline_parse_token_hdr_t *tk,
 		return -1;
 	*opaque = cb;
 
-	n = get_next_node(*tkd->cur, NULL, flags, mask);
-	if (n == NULL)
-		return -1; /* no completion */
+	if (strlen(tokstr) >= 2 && tokstr[0] == '/' && tokstr[1] == '/') {
+		start = *tkd->root;
+		cb->xpath = 1;
+	}
+	else {
+		start = *tkd->cur;
+		cb->xpath = 0;
+	}
+
+	n = get_next_node(start, NULL, flags, mask, cb->xpath);
+	if (n == NULL) {
+		/* no completion.
+		 * cb is freed in complete_conf_node_end()*/
+		return -1;
+	}
 
-	cb->start = *tkd->cur;
+	cb->start = start;
 	cb->cur = n;
 	return 0;
 }
@@ -221,21 +249,22 @@ complete_conf_node_iterate(cmdline_parse_token_hdr_t *tk, void **opaque,
 	struct token_conf_node_data *tkd = &tk2->conf_node_data;
 	struct confnode_complete_callback *cb;
 	struct confnode *n;
-	unsigned len;
 	unsigned flags = tkd->flags;
 	unsigned mask = tkd->mask;
+	int len;
 
 	cb = *opaque;
 	n = cb->cur;
 	if (n == NULL)
 		return -1;
-	cb->cur = get_next_node(cb->start, n, flags, mask);
+	cb->cur = get_next_node(cb->start, n, flags, mask, cb->xpath);
 
-	len = strlen(n->name) + 1;
-	if (len > size)
+	len = snprintf(dstbuf, size, "%s%s",
+		       cb->xpath ? "//" : "",
+		       n->name);
+	if (len < 0 || len >= size)
 		return -1;
 
-	strcpy(dstbuf, n->name);
 	return 0;
 }