From 6586a50de3ad7f47a895f904ff66cc6613d62124 Mon Sep 17 00:00:00 2001
From: Jabiertxof <jtx@jtx>
Date: Wed, 7 Dec 2016 23:17:49 +0100
Subject: Improve measure line to allow similar LPE

(bzr r15310)
---
 src/live_effects/lpe-measure-line.cpp | 5 ++++-
 src/sp-lpe-item.cpp                   | 3 ++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/live_effects/lpe-measure-line.cpp b/src/live_effects/lpe-measure-line.cpp
index 8b73781b5..45076d625 100644
--- a/src/live_effects/lpe-measure-line.cpp
+++ b/src/live_effects/lpe-measure-line.cpp
@@ -686,7 +686,6 @@ LPEMeasureLine::doBeforeEffect (SPLPEItem const* lpeitem)
     }
 }
 
-
 void
 LPEMeasureLine::doOnVisibilityToggled(SPLPEItem const* /*lpeitem*/)
 {
@@ -696,6 +695,7 @@ LPEMeasureLine::doOnVisibilityToggled(SPLPEItem const* /*lpeitem*/)
 void 
 LPEMeasureLine::doOnRemove (SPLPEItem const* /*lpeitem*/)
 {
+    //unset "erase_extra_objects" hook on sp-lpe-item.cpp
     if (!erase_extra_objects) {
         processObjects(LPE_TO_OBJECTS);
         elements.clear();
@@ -711,6 +711,9 @@ LPEMeasureLine::processObjects(LpeAction lpe_action)
         for (std::vector<const char *>::iterator el_it = elements.begin(); 
              el_it != elements.end(); ++el_it) {
             const char * id = *el_it;
+            if (!id || strlen(id) == 0) {
+                return;
+            }
             Inkscape::URI SVGElem_uri(Glib::ustring("#").append(id).c_str());
             Inkscape::URIReference* SVGElemRef = new Inkscape::URIReference(desktop->doc());
             SVGElemRef->attach(SVGElem_uri);
diff --git a/src/sp-lpe-item.cpp b/src/sp-lpe-item.cpp
index 872a88289..e2f61bfb5 100644
--- a/src/sp-lpe-item.cpp
+++ b/src/sp-lpe-item.cpp
@@ -125,7 +125,8 @@ void SPLPEItem::set(unsigned int key, gchar const* value) {
                 {
                     if (!value) {
                         LivePathEffectObject *lpeobj = (*it)->lpeobject;
-                        if (Inkscape::LivePathEffect::LPEMeasureLine * lpe = dynamic_cast<Inkscape::LivePathEffect::LPEMeasureLine *>(lpeobj->get_lpe())) {
+                        Inkscape::LivePathEffect::Effect * lpe = lpeobj->get_lpe();
+                        if (dynamic_cast<Inkscape::LivePathEffect::LPEMeasureLine *>(lpe)){
                             lpe->doOnRemove(this);
                         }
                     }
-- 
cgit v1.2.3