From a8d7f4db568ca421bab7f4d2828fe2d3c17e6072 Mon Sep 17 00:00:00 2001
From: Krzysztof Kosi??ski <tweenk.pl@gmail.com>
Date: Thu, 27 Feb 2014 04:54:34 +0100
Subject: Partial fix for LP #1001756 (crash when ungrouping a selection
 containing both a group and its clone). There are still some problems with
 undo/redo (incomplete undo transaction somewhere).

(bzr r13063)
---
 src/sp-use.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'src/sp-use.cpp')

diff --git a/src/sp-use.cpp b/src/sp-use.cpp
index b2a51b8d9..e394e84c2 100644
--- a/src/sp-use.cpp
+++ b/src/sp-use.cpp
@@ -299,6 +299,23 @@ SPItem const *SPUse::root() const {
 	return const_cast<SPUse*>(this)->root();
 }
 
+/**
+ * Get the number of dereferences or calls to get_original() needed to get an object
+ * which is not an svg:use. Returns -1 if there is no original object.
+ */
+int SPUse::cloneDepth() const {
+    unsigned depth = 1;
+    SPItem *orig = this->child;
+
+    while (orig && SP_IS_USE(orig)) {
+        ++depth;
+        orig = SP_USE(orig)->child;
+    }
+
+    if (!orig) return -1;
+    return depth;
+}
+
 /**
  * Returns the effective transform that goes from the ultimate original to given SPUse, both ends
  * included.
-- 
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