From 26befde81c6d0c40ce5ebf9244b0f963587b7646 Mon Sep 17 00:00:00 2001
From: Michael Drake <tlsa@netsurf-browser.org>
Date: Wed, 3 Jul 2013 11:50:23 +0100
Subject: [PATCH] Make READ_ONLY flag a combinator for NO_MOVES and NO_DELETES.
  Implement NO_DELETES.

---
 desktop/treeview.c | 31 ++++++++++++++++++++++++++-----
 desktop/treeview.h |  9 +++++----
 2 files changed, 31 insertions(+), 9 deletions(-)

diff --git a/desktop/treeview.c b/desktop/treeview.c
index 5d8a72f31..062ef9bc7 100644
--- a/desktop/treeview.c
+++ b/desktop/treeview.c
@@ -469,16 +469,30 @@ nserror treeview_create_node_entry(struct treeview *tree,
 }
 
 
-/* Exported interface, documented in treeview.h */
-nserror treeview_delete_node(struct treeview *tree, struct treeview_node *n)
+/**
+ * Delete a treeview node
+ *
+ * \param tree		Treeview object to delete node from
+ * \param n		Node to delete
+ * \param interaction	Delete is result of user interaction with treeview
+ * \return NSERROR_OK on success, appropriate error otherwise
+ *
+ * Will emit folder or entry deletion msg callback.
+ */
+static nserror treeview_delete_node_internal(struct treeview *tree,
+		struct treeview_node *n, bool interaction)
 {
 	struct treeview_node_msg msg;
 	msg.msg = TREE_MSG_NODE_DELETE;
 	struct treeview_node *p;
 
+	if (interaction && (tree->flags & TREEVIEW_NO_DELETES)) {
+		return NSERROR_OK;
+	}
+
 	/* Destroy children first */
 	while (n->children != NULL) {
-		treeview_delete_node(tree, n->children);
+		treeview_delete_node_internal(tree, n->children, interaction);
 	}
 
 	/* Unlink node from tree */
@@ -527,6 +541,13 @@ nserror treeview_delete_node(struct treeview *tree, struct treeview_node *n)
 }
 
 
+/* Exported interface, documented in treeview.h */
+nserror treeview_delete_node(struct treeview *tree, struct treeview_node *n)
+{
+	return treeview_delete_node_internal(tree, n, false);
+}
+
+
 /* Exported interface, documented in treeview.h */
 nserror treeview_create(struct treeview **tree,
 		const struct treeview_callback_table *callbacks,
@@ -614,7 +635,7 @@ nserror treeview_destroy(struct treeview *tree)
 	assert(tree != NULL);
 
 	/* Destroy nodes */
-	treeview_delete_node(tree, tree->root);
+	treeview_delete_node_internal(tree, tree->root, false);
 
 	/* Destroy feilds */
 	for (f = 0; f <= tree->n_fields; f++) {
@@ -1086,7 +1107,7 @@ static bool treeview_node_selection_walk_cb(struct treeview_node *node,
 
 	case TREEVIEW_WALK_DELETE_SELECTION:
 		if (node->flags & TREE_NODE_SELECTED) {
-			treeview_delete_node(sw->tree, node);
+			treeview_delete_node_internal(sw->tree, node, true);
 			changed = true;
 		}
 		break;
diff --git a/desktop/treeview.h b/desktop/treeview.h
index 5704014c5..475b90e67 100644
--- a/desktop/treeview.h
+++ b/desktop/treeview.h
@@ -44,10 +44,11 @@ typedef enum {
 } treeview_node_create_flags;					/**< Relationship between nodes */
 
 typedef enum {
-	TREEVIEW_NO_FLAGS		= (0),		/* No flags set */
-	TREEVIEW_READ_ONLY		= (1 << 0),	/* No edits */
-	TREEVIEW_NO_MOVES		= (1 << 1),	/* No node drags */
-	TREEVIEW_DELETE_EMPTY_DIRS	= (1 << 2)	/* Del. dirs on empty */
+	TREEVIEW_NO_FLAGS	= (0),		/**< No flags set */
+	TREEVIEW_NO_MOVES	= (1 << 0),	/**< No node drags */
+	TREEVIEW_NO_DELETES	= (1 << 1),	/**< No node deletes */
+	TREEVIEW_READ_ONLY	= TREEVIEW_NO_MOVES | TREEVIEW_NO_DELETES,
+	TREEVIEW_DEL_EMPTY_DIRS	= (1 << 2)	/**< Delete dirs on empty */
 } treeview_flags;
 
 enum treeview_msg {