Code

Connector tool: make connectors avoid the convex hull of shapes.
[inkscape.git] / src / sp-shape.cpp
index 7ee2af1ec97321eecde89ff6d8331847cebf773e..519002e9e1b43c6944a890fcb02b499da2ed1800 100644 (file)
@@ -68,7 +68,7 @@ static void sp_shape_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &
 void sp_shape_print (SPItem * item, SPPrintContext * ctx);
 static NRArenaItem *sp_shape_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
 static void sp_shape_hide (SPItem *item, unsigned int key);
-static void sp_shape_snappoints (SPItem const *item, SnapPointsIter p, Inkscape::SnapPreferences const *snapprefs);
+static void sp_shape_snappoints (SPItem const *item, bool const target, SnapPointsWithType &p, Inkscape::SnapPreferences const *snapprefs);
 
 static void sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai);
 
@@ -139,7 +139,9 @@ sp_shape_init (SPShape *shape)
     for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) {
         new (&shape->release_connect[i]) sigc::connection();
         new (&shape->modified_connect[i]) sigc::connection();
+        shape->marker[i] = NULL;
     }
+    shape->curve = NULL;
 }
 
 static void
@@ -199,15 +201,15 @@ sp_shape_release (SPObject *object)
     item = (SPItem *) object;
     shape = (SPShape *) object;
 
-    for (i=SP_MARKER_LOC_START; i<SP_MARKER_LOC_QTY; i++) {
-      if (shape->marker[i]) {
-        for (v = item->display; v != NULL; v = v->next) {
-          sp_marker_hide ((SPMarker *) shape->marker[i], NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
+    for (i = 0; i < SP_MARKER_LOC_QTY; i++) {
+        if (shape->marker[i]) {
+            for (v = item->display; v != NULL; v = v->next) {
+              sp_marker_hide ((SPMarker *) shape->marker[i], NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
+            }
+            shape->release_connect[i].disconnect();
+            shape->modified_connect[i].disconnect();
+            shape->marker[i] = sp_object_hunref (shape->marker[i], object);
         }
-      shape->release_connect[i].disconnect();
-      shape->modified_connect[i].disconnect();
-        shape->marker[i] = sp_object_hunref (shape->marker[i], object);
-      }
     }
     if (shape->curve) {
         shape->curve = shape->curve->unref();
@@ -298,7 +300,7 @@ sp_shape_update (SPObject *object, SPCtx *ctx, unsigned int flags)
             for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
                 if (shape->marker[i]) {
                     sp_marker_show_dimension ((SPMarker *) shape->marker[i],
-                                              NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i - SP_MARKER_LOC,
+                                              NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i,
                                               sp_shape_number_of_markers (shape, i));
                 }
             }
@@ -396,9 +398,7 @@ sp_shape_marker_get_transform_at_end(Geom::Curve const & c)
  * Marker views have to be scaled already.  The transformation
  * is retrieved and then shown by calling sp_marker_show_instance.
  *
- * TODO: correctly handle the 'marker' attribute.
- * "Using the marker property from a style sheet is equivalent to using all three (start, mid, end)."
- * See painting-marker-03-f.svg in SVG 1.1 Full test suite.
+ * @todo figure out what to do when both 'marker' and for instance 'marker-end' are set.
  */
 static void
 sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai)
@@ -406,54 +406,102 @@ sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai)
     SPStyle *style = ((SPObject *) shape)->style;
 
     // position arguments to sp_marker_show_instance, basically counts the amount of markers.
-    int start_pos = 0;
-    int mid_pos = 0;
-    int end_pos = 0;
+    int counter[4] = {0};
 
     Geom::PathVector const & pathv = shape->curve->get_pathvector();
-    for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
-        if ( shape->marker[SP_MARKER_LOC_START] ) {
-            Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
-            sp_marker_show_instance ((SPMarker* ) shape->marker[SP_MARKER_LOC_START], ai,
-                                     NR_ARENA_ITEM_GET_KEY(ai) + SP_MARKER_LOC_START, start_pos, m,
-                                     style->stroke_width.computed);
-             start_pos++;
+
+    // the first vertex should get a start marker, the last an end marker, and all the others a mid marker
+    // see bug 456148
+
+    // START marker
+    {
+        Geom::Matrix const m (sp_shape_marker_get_transform_at_start(pathv.begin()->front()));
+        for (int i = 0; i < 2; i++) {  // SP_MARKER_LOC and SP_MARKER_LOC_START
+            if ( shape->marker[i] ) {
+                sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
+                                         NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
+                                         style->stroke_width.computed);
+                 counter[i]++;
+            }
         }
+    }
 
-        if ( shape->marker[SP_MARKER_LOC_MID] && (path_it->size_default() > 1) ) {
-            Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
-            Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
-            while (curve_it2 != path_it->end_default())
+    // MID marker
+    if (shape->marker[SP_MARKER_LOC_MID] || shape->marker[SP_MARKER_LOC]) {
+        for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
+            // START position
+            if ( path_it != pathv.begin() 
+                 && ! ((path_it == (pathv.end()-1)) && (path_it->size_default() == 0)) ) // if this is the last path and it is a moveto-only, don't draw mid marker there
             {
-                /* Put marker between curve_it1 and curve_it2.
-                 * Loop to end_default (so including closing segment), because when a path is closed,
-                 * there should be a midpoint marker between last segment and closing straight line segment
-                 */
-                Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
-                sp_marker_show_instance ((SPMarker* ) shape->marker[SP_MARKER_LOC_MID], ai,
-                                         NR_ARENA_ITEM_GET_KEY(ai) + SP_MARKER_LOC_MID, mid_pos, m,
-                                         style->stroke_width.computed);
-                mid_pos++;
+                Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
+                for (int i = 0; i < 3; i += 2) {  // SP_MARKER_LOC and SP_MARKER_LOC_MID
+                    if ( shape->marker[i] ) {
+                        sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
+                                                 NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
+                                                 style->stroke_width.computed);
+                         counter[i]++;
+                    }
+                }
+            }
+            // MID position
+            if ( path_it->size_default() > 1) {
+                Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
+                Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
+                while (curve_it2 != path_it->end_default())
+                {
+                    /* Put marker between curve_it1 and curve_it2.
+                     * Loop to end_default (so including closing segment), because when a path is closed,
+                     * there should be a midpoint marker between last segment and closing straight line segment
+                     */
+                    Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
+                    for (int i = 0; i < 3; i += 2) {  // SP_MARKER_LOC and SP_MARKER_LOC_MID
+                        if (shape->marker[i]) {
+                            sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
+                                                     NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
+                                                     style->stroke_width.computed);
+                            counter[i]++;
+                        }
+                    }
 
-                ++curve_it1;
-                ++curve_it2;
+                    ++curve_it1;
+                    ++curve_it2;
+                }
+            }
+            // END position
+            if ( path_it != (pathv.end()-1) && !path_it->empty()) {
+                Geom::Curve const &lastcurve = path_it->back_default();
+                Geom::Matrix const m = sp_shape_marker_get_transform_at_end(lastcurve);
+                for (int i = 0; i < 3; i += 2) {  // SP_MARKER_LOC and SP_MARKER_LOC_MID
+                    if (shape->marker[i]) {
+                        sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
+                                                 NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
+                                                 style->stroke_width.computed);
+                        counter[i]++;
+                    }
+                }
             }
         }
+    }
 
-        if ( shape->marker[SP_MARKER_LOC_END] ) {
-            /* Get reference to last curve in the path.
-             * For moveto-only path, this returns the "closing line segment". */
-            unsigned int index = path_it->size_default();
-            if (index > 0) {
-                index--;
-            }
-            Geom::Curve const &lastcurve = (*path_it)[index];
+    // END marker
+    if ( shape->marker[SP_MARKER_LOC_END] || shape->marker[SP_MARKER_LOC] ) {
+        /* Get reference to last curve in the path.
+         * For moveto-only path, this returns the "closing line segment". */
+        Geom::Path const &path_last = pathv.back();
+        unsigned int index = path_last.size_default();
+        if (index > 0) {
+            index--;
+        }
+        Geom::Curve const &lastcurve = path_last[index];
+        Geom::Matrix const m = sp_shape_marker_get_transform_at_end(lastcurve);
 
-            Geom::Matrix const m = sp_shape_marker_get_transform_at_end(lastcurve);
-            sp_marker_show_instance ((SPMarker* ) shape->marker[SP_MARKER_LOC_END], ai,
-                                     NR_ARENA_ITEM_GET_KEY(ai) + SP_MARKER_LOC_END, end_pos, m,
-                                     style->stroke_width.computed);
-            end_pos++;
+        for (int i = 0; i < 4; i += 3) {  // SP_MARKER_LOC and SP_MARKER_LOC_END
+            if (shape->marker[i]) {
+                sp_marker_show_instance ((SPMarker* ) shape->marker[i], ai,
+                                         NR_ARENA_ITEM_GET_KEY(ai) + i, counter[i], m,
+                                         style->stroke_width.computed);
+                counter[i]++;
+            }
         }
     }
 }
@@ -511,43 +559,20 @@ static void sp_shape_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &
 
                 // Union with bboxes of the markers, if any
                 if (sp_shape_has_markers (shape)) {
-                    /* TODO: make code prettier: lots of variables can be taken out of the loop! */
+                    /** \todo make code prettier! */
                     Geom::PathVector const & pathv = shape->curve->get_pathvector();
-                    for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
-                        if ( shape->marker[SP_MARKER_LOC_START] ) {
-                            SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_START]);
-                            SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_START]));
-
-                            Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front()));
-
-                            if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
-                                tr = Geom::Scale(style->stroke_width.computed) * tr;
-                            }
-
-                            // total marker transform
-                            tr = marker_item->transform * marker->c2p * tr * transform;
-
-                            // get bbox of the marker with that transform
-                            NRRect marker_bbox;
-                            sp_item_invoke_bbox (marker_item, &marker_bbox, from_2geom(tr), true);
-                            // union it with the shape bbox
-                            nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
-                        }
-
-                        if ( shape->marker[SP_MARKER_LOC_MID] && (path_it->size_default() > 1) ) {
-                            Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
-                            Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
-                            while (curve_it2 != path_it->end_default())
-                            {
-                                /* Put marker between curve_it1 and curve_it2.
-                                 * Loop to end_default (so including closing segment), because when a path is closed,
-                                 * there should be a midpoint marker between last segment and closing straight line segment */
-
-                                SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_MID]);
-                                SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_MID]));
-
-                                Geom::Matrix tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
-
+                    // START marker
+                    for (unsigned i = 0; i < 2; i++) { // SP_MARKER_LOC and SP_MARKER_LOC_START
+                        if ( shape->marker[i] ) {
+                            SPMarker* marker = SP_MARKER (shape->marker[i]);
+                            SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
+
+                            if (marker_item) {
+                                Geom::Matrix tr(sp_shape_marker_get_transform_at_start(pathv.begin()->front()));
+                                if (!marker->orient_auto) {
+                                    Geom::Point transl = tr.translation();
+                                    tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
+                                }
                                 if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
                                     tr = Geom::Scale(style->stroke_width.computed) * tr;
                                 }
@@ -560,38 +585,118 @@ static void sp_shape_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &
                                 sp_item_invoke_bbox (marker_item, &marker_bbox, from_2geom(tr), true);
                                 // union it with the shape bbox
                                 nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
-
-                                ++curve_it1;
-                                ++curve_it2;
                             }
                         }
-
-                        if ( shape->marker[SP_MARKER_LOC_END] ) {
-                            SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_END]);
-                            SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_END]));
-
-                            /* Get reference to last curve in the path.
-                             * For moveto-only path, this returns the "closing line segment". */
-                            unsigned int index = path_it->size_default();
-                            if (index > 0) {
-                                index--;
+                    }
+                    // MID marker
+                    for (unsigned i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
+                        SPMarker* marker = SP_MARKER (shape->marker[i]);
+                        if ( !shape->marker[i] ) continue;
+                        SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
+                        if ( !marker_item ) continue;
+
+                        for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
+                            // START position
+                            if ( path_it != pathv.begin() 
+                                 && ! ((path_it == (pathv.end()-1)) && (path_it->size_default() == 0)) ) // if this is the last path and it is a moveto-only, there is no mid marker there
+                            {
+                                Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front()));
+                                if (!marker->orient_auto) {
+                                    Geom::Point transl = tr.translation();
+                                    tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
+                                }
+                                if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
+                                    tr = Geom::Scale(style->stroke_width.computed) * tr;
+                                }
+                                tr = marker_item->transform * marker->c2p * tr * transform;
+                                NRRect marker_bbox;
+                                sp_item_invoke_bbox (marker_item, &marker_bbox, from_2geom(tr), true);
+                                nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
                             }
-                            Geom::Curve const &lastcurve = (*path_it)[index];
-
-                            Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
-
-                            if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
-                                tr = Geom::Scale(style->stroke_width.computed) * tr;
+                            // MID position
+                            if ( path_it->size_default() > 1) {
+                                Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
+                                Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
+                                while (curve_it2 != path_it->end_default())
+                                {
+                                    /* Put marker between curve_it1 and curve_it2.
+                                     * Loop to end_default (so including closing segment), because when a path is closed,
+                                     * there should be a midpoint marker between last segment and closing straight line segment */
+
+                                    SPMarker* marker = SP_MARKER (shape->marker[i]);
+                                    SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
+
+                                    if (marker_item) {
+                                        Geom::Matrix tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
+                                        if (!marker->orient_auto) {
+                                            Geom::Point transl = tr.translation();
+                                            tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
+                                        }
+                                        if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
+                                            tr = Geom::Scale(style->stroke_width.computed) * tr;
+                                        }
+                                        tr = marker_item->transform * marker->c2p * tr * transform;
+                                        NRRect marker_bbox;
+                                        sp_item_invoke_bbox (marker_item, &marker_bbox, from_2geom(tr), true);
+                                        nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
+                                    }
+
+                                    ++curve_it1;
+                                    ++curve_it2;
+                                }
+                            }
+                            // END position
+                            if ( path_it != (pathv.end()-1) && !path_it->empty()) {
+                                Geom::Curve const &lastcurve = path_it->back_default();
+                                Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
+                                if (!marker->orient_auto) {
+                                    Geom::Point transl = tr.translation();
+                                    tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
+                                }
+                                if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
+                                    tr = Geom::Scale(style->stroke_width.computed) * tr;
+                                }
+                                tr = marker_item->transform * marker->c2p * tr * transform;
+                                NRRect marker_bbox;
+                                sp_item_invoke_bbox (marker_item, &marker_bbox, tr, true);
+                                nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
                             }
+                        }
+                    }
+                    // END marker
+                    for (unsigned i = 0; i < 4; i += 3) { // SP_MARKER_LOC and SP_MARKER_LOC_END
+                        if ( shape->marker[i] ) {
+                            SPMarker* marker = SP_MARKER (shape->marker[i]);
+                            SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
+
+                            if (marker_item) {
+                                /* Get reference to last curve in the path.
+                                 * For moveto-only path, this returns the "closing line segment". */
+                                Geom::Path const &path_last = pathv.back();
+                                unsigned int index = path_last.size_default();
+                                if (index > 0) {
+                                    index--;
+                                }
+                                Geom::Curve const &lastcurve = path_last[index];
+
+                                Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
+                                if (!marker->orient_auto) {
+                                    Geom::Point transl = tr.translation();
+                                    tr = Geom::Rotate::from_degrees(marker->orient) * Geom::Translate(transl);
+                                }
+                                if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
+                                    tr = Geom::Scale(style->stroke_width.computed) * tr;
+                                }
 
-                            // total marker transform
-                            tr = marker_item->transform * marker->c2p * tr * transform;
+                                // total marker transform
+                                tr = marker_item->transform * marker->c2p * tr * transform;
 
-                            // get bbox of the marker with that transform
-                            NRRect marker_bbox;
-                            sp_item_invoke_bbox (marker_item, &marker_bbox, tr, true);
-                            // union it with the shape bbox
-                            nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
+                                // get bbox of the marker with that transform
+                                NRRect marker_bbox;
+                                sp_item_invoke_bbox (marker_item, &marker_bbox, tr, true);
+                                // union it with the shape bbox
+                                nr_rect_d_union (&cbbox, &cbbox, &marker_bbox);
+                            }
                         }
                     }
                 }
@@ -603,6 +708,21 @@ static void sp_shape_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &
     }
 }
 
+static void
+sp_shape_print_invoke_marker_printing(SPObject* obj, Geom::Matrix tr, SPStyle* style, SPPrintContext *ctx) {
+    SPMarker *marker = SP_MARKER(obj);
+    if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
+        tr = Geom::Scale(style->stroke_width.computed) * tr;
+    }
+
+    SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker));
+    tr = marker_item->transform * marker->c2p * tr;
+
+    Geom::Matrix old_tr = marker_item->transform;
+    marker_item->transform = tr;
+    sp_item_invoke_print (marker_item, ctx);
+    marker_item->transform = old_tr;
+}
 /**
  * Prepares shape for printing.  Handles printing of comments for printing
  * debugging, sizes the item to fit into the document width/height,
@@ -628,7 +748,7 @@ sp_shape_print (SPItem *item, SPPrintContext *ctx)
         }
 
     /* fixme: Think (Lauris) */
-    sp_item_invoke_bbox(item, &pbox, NR::identity(), TRUE);
+    sp_item_invoke_bbox(item, &pbox, Geom::identity(), TRUE);
     dbox.x0 = 0.0;
     dbox.y0 = 0.0;
     dbox.x1 = sp_document_width (SP_OBJECT_DOCUMENT (item));
@@ -636,7 +756,7 @@ sp_shape_print (SPItem *item, SPPrintContext *ctx)
     sp_item_bbox_desktop (item, &bbox);
     Geom::Matrix const i2d(sp_item_i2d_affine(item));
 
-        SPStyle* style = SP_OBJECT_STYLE (item);
+    SPStyle* style = SP_OBJECT_STYLE (item);
 
     if (!style->fill.isNone()) {
         sp_print_fill (ctx, shape->curve->get_pathvector(), &i2d, style, &pbox, &dbox, &bbox);
@@ -646,81 +766,68 @@ sp_shape_print (SPItem *item, SPPrintContext *ctx)
         sp_print_stroke (ctx, shape->curve->get_pathvector(), &i2d, style, &pbox, &dbox, &bbox);
     }
 
-    /* TODO: make code prettier: lots of variables can be taken out of the loop! */
+    /** \todo make code prettier */
     Geom::PathVector const & pathv = shape->curve->get_pathvector();
-    for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
-        if ( shape->marker[SP_MARKER_LOC_START] ) {
-            SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_START]);
-            SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_START]));
-
-            Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front()));
-
-            if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
-                tr = Geom::Scale(style->stroke_width.computed) * tr;
-            }
-
-            tr = marker_item->transform * marker->c2p * tr;
-
-            NR::Matrix old_tr = marker_item->transform;
-            marker_item->transform = tr;
-            sp_item_invoke_print (marker_item, ctx);
-            marker_item->transform = old_tr;
+    // START marker
+    for (int i = 0; i < 2; i++) {  // SP_MARKER_LOC and SP_MARKER_LOC_START    
+        if ( shape->marker[i] ) {
+            Geom::Matrix tr(sp_shape_marker_get_transform_at_start(pathv.begin()->front()));
+            sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
         }
-
-        if ( shape->marker[SP_MARKER_LOC_MID] && (path_it->size_default() > 1) ) {
-            Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
-            Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
-            while (curve_it2 != path_it->end_default())
-            {
-                /* Put marker between curve_it1 and curve_it2.
-                 * Loop to end_default (so including closing segment), because when a path is closed,
-                 * there should be a midpoint marker between last segment and closing straight line segment */
-
-                SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_MID]);
-                SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_MID]));
-
-                Geom::Matrix tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
-
-                if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
-                    tr = Geom::Scale(style->stroke_width.computed) * tr;
+    }
+    // MID marker
+    for (int i = 0; i < 3; i += 2) {  // SP_MARKER_LOC and SP_MARKER_LOC_MID
+        if (shape->marker[i]) {
+            for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
+                // START position
+                if ( path_it != pathv.begin() 
+                     && ! ((path_it == (pathv.end()-1)) && (path_it->size_default() == 0)) ) // if this is the last path and it is a moveto-only, there is no mid marker there
+                {
+                    Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front()));
+                    sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
+                }
+                // MID position
+                if ( path_it->size_default() > 1) {
+                    Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
+                    Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
+                    while (curve_it2 != path_it->end_default())
+                    {
+                        /* Put marker between curve_it1 and curve_it2.
+                         * Loop to end_default (so including closing segment), because when a path is closed,
+                         * there should be a midpoint marker between last segment and closing straight line segment */
+                        Geom::Matrix tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
+
+                        sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
+
+                        ++curve_it1;
+                        ++curve_it2;
+                    }
+                }
+                if ( path_it != (pathv.end()-1) && !path_it->empty()) {
+                    Geom::Curve const &lastcurve = path_it->back_default();
+                    Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
+                    sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
                 }
-
-                tr = marker_item->transform * marker->c2p * tr;
-
-                NR::Matrix old_tr = marker_item->transform;
-                marker_item->transform = tr;
-                sp_item_invoke_print (marker_item, ctx);
-                marker_item->transform = old_tr;
-
-                ++curve_it1;
-                ++curve_it2;
             }
         }
+    }
+    // END marker
+    if ( shape->marker[SP_MARKER_LOC_END] || shape->marker[SP_MARKER_LOC]) {
+        /* Get reference to last curve in the path.
+         * For moveto-only path, this returns the "closing line segment". */
+        Geom::Path const &path_last = pathv.back();
+        unsigned int index = path_last.size_default();
+        if (index > 0) {
+            index--;
+        }
+        Geom::Curve const &lastcurve = path_last[index];
 
-        if ( shape->marker[SP_MARKER_LOC_END] ) {
-            SPMarker* marker = SP_MARKER (shape->marker[SP_MARKER_LOC_END]);
-            SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[SP_MARKER_LOC_END]));
-
-            /* Get reference to last curve in the path.
-             * For moveto-only path, this returns the "closing line segment". */
-            unsigned int index = path_it->size_default();
-            if (index > 0) {
-                index--;
-            }
-            Geom::Curve const &lastcurve = (*path_it)[index];
-
-            Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
+        Geom::Matrix tr = sp_shape_marker_get_transform_at_end(lastcurve);
 
-            if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
-                tr = Geom::Scale(style->stroke_width.computed) * tr;
+        for (int i = 0; i < 4; i += 3) {  // SP_MARKER_LOC and SP_MARKER_LOC_END
+            if (shape->marker[i]) {
+                sp_shape_print_invoke_marker_printing(shape->marker[i], tr, style, ctx);
             }
-
-            tr = marker_item->transform * marker->c2p * tr;
-
-            NR::Matrix old_tr = marker_item->transform;
-            marker_item->transform = tr;
-            sp_item_invoke_print (marker_item, ctx);
-            marker_item->transform = old_tr;
         }
     }
 
@@ -769,7 +876,7 @@ sp_shape_show (SPItem *item, NRArena *arena, unsigned int /*key*/, unsigned int
         for (int i = 0; i < SP_MARKER_LOC_QTY; i++) {
             if (shape->marker[i]) {
                 sp_marker_show_dimension ((SPMarker *) shape->marker[i],
-                                          NR_ARENA_ITEM_GET_KEY (arenaitem) + i - SP_MARKER_LOC,
+                                          NR_ARENA_ITEM_GET_KEY (arenaitem) + i,
                                           sp_shape_number_of_markers (shape, i));
             }
         }
@@ -822,7 +929,8 @@ sp_shape_has_markers (SPShape const *shape)
 
     return (
         shape->curve &&
-        (shape->marker[SP_MARKER_LOC_START] ||
+        (shape->marker[SP_MARKER_LOC] ||
+         shape->marker[SP_MARKER_LOC_START] ||
          shape->marker[SP_MARKER_LOC_MID] ||
          shape->marker[SP_MARKER_LOC_END])
         );
@@ -838,40 +946,46 @@ int
 sp_shape_number_of_markers (SPShape *shape, int type)
 {
     Geom::PathVector const & pathv = shape->curve->get_pathvector();
+    if (pathv.size() == 0) {
+        return 0;
+    }
 
     switch(type) {
-        case SP_MARKER_LOC_START:
-            return shape->marker[SP_MARKER_LOC_START] ? pathv.size() : 0;
-
-        case SP_MARKER_LOC_MID:
+        case SP_MARKER_LOC:
         {
-            if ( shape->marker[SP_MARKER_LOC_MID] ) {
-            guint n = 0;
+            if ( shape->marker[SP_MARKER_LOC] ) {
+                guint n = 0;
                 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
-                    n += path_it->size();
-                    n += path_it->closed() ? 1 : 0;
+                    n += path_it->size_default() + 1;
                 }
                 return n;
             } else {
                 return 0;
             }
         }
+        case SP_MARKER_LOC_START:
+            // there is only a start marker on the first path of a pathvector
+            return shape->marker[SP_MARKER_LOC_START] ? 1 : 0;
 
-        case SP_MARKER_LOC_END:
+        case SP_MARKER_LOC_MID:
         {
-            if ( shape->marker[SP_MARKER_LOC_END] ) {
+            if ( shape->marker[SP_MARKER_LOC_MID] ) {
                 guint n = 0;
                 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
-                    if (!path_it->empty()) {
-                        n++;
-                    }
+                    n += path_it->size_default() + 1;
                 }
-                return n;
+                return n - 2; // minus the start and end marker.
             } else {
                 return 0;
             }
         }
 
+        case SP_MARKER_LOC_END:
+        {
+            // there is only an end marker on the last path of a pathvector
+            return shape->marker[SP_MARKER_LOC_END] ? 1 : 0;
+        }
+
         default:
             return 0;
     }
@@ -890,20 +1004,20 @@ sp_shape_marker_release (SPObject *marker, SPShape *shape)
 
     item = (SPItem *) shape;
 
-    for (i = SP_MARKER_LOC_START; i < SP_MARKER_LOC_QTY; i++) {
-      if (marker == shape->marker[i]) {
-        SPItemView *v;
-        /* Hide marker */
-        for (v = item->display; v != NULL; v = v->next) {
-          sp_marker_hide ((SPMarker *) (shape->marker[i]), NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
-          /* fixme: Do we need explicit remove here? (Lauris) */
-          /* nr_arena_item_set_mask (v->arenaitem, NULL); */
+    for (i = 0; i < SP_MARKER_LOC_QTY; i++) {
+        if (marker == shape->marker[i]) {
+            SPItemView *v;
+            /* Hide marker */
+            for (v = item->display; v != NULL; v = v->next) {
+              sp_marker_hide ((SPMarker *) (shape->marker[i]), NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i);
+              /* fixme: Do we need explicit remove here? (Lauris) */
+              /* nr_arena_item_set_mask (v->arenaitem, NULL); */
+            }
+            /* Detach marker */
+            shape->release_connect[i].disconnect();
+            shape->modified_connect[i].disconnect();
+            shape->marker[i] = sp_object_hunref (shape->marker[i], item);
         }
-        /* Detach marker */
-      shape->release_connect[i].disconnect();
-      shape->modified_connect[i].disconnect();
-        shape->marker[i] = sp_object_hunref (shape->marker[i], item);
-      }
     }
 }
 
@@ -930,7 +1044,7 @@ sp_shape_set_marker (SPObject *object, unsigned int key, const gchar *value)
     SPItem *item = (SPItem *) object;
     SPShape *shape = (SPShape *) object;
 
-    if (key < SP_MARKER_LOC_START || key > SP_MARKER_LOC_END) {
+    if (key > SP_MARKER_LOC_END) {
         return;
     }
 
@@ -1035,7 +1149,7 @@ sp_shape_set_curve_insync (SPShape *shape, SPCurve *curve, unsigned int owner)
 /**
  * Return all nodes in a path that are to be considered for snapping
  */
-static void sp_shape_snappoints(SPItem const *item, SnapPointsIter p, Inkscape::SnapPreferences const *snapprefs)
+static void sp_shape_snappoints(SPItem const *item, bool const target, SnapPointsWithType &p, Inkscape::SnapPreferences const *snapprefs)
 {
     g_assert(item != NULL);
     g_assert(SP_IS_SHAPE(item));
@@ -1045,14 +1159,32 @@ static void sp_shape_snappoints(SPItem const *item, SnapPointsIter p, Inkscape::
         return;
     }
 
+    // Help enforcing strict snapping, i.e. only return nodes when we're snapping nodes to nodes or a guide to nodes
+    if (!(snapprefs->getSnapModeNode() || snapprefs->getSnapModeGuide())) {
+       return;
+    }
+
     Geom::PathVector const &pathv = shape->curve->get_pathvector();
     if (pathv.empty())
         return;
 
     Geom::Matrix const i2d (sp_item_i2d_affine (item));
 
+    int type;
+
+       if (snapprefs->getSnapObjectMidpoints()) {
+               Geom::OptRect bbox = item->getBounds(sp_item_i2d_affine(item));
+               if (bbox) {
+                       type = target ? int(Inkscape::SNAPTARGET_OBJECT_MIDPOINT) : int(Inkscape::SNAPSOURCE_OBJECT_MIDPOINT);
+                       p.push_back(std::make_pair(bbox->midpoint(), type));
+               }
+       }
+
     for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
-        *p = from_2geom(path_it->initialPoint() * i2d);
+        if (snapprefs->getSnapToItemNode()) {
+               type = target ? int(Inkscape::SNAPTARGET_NODE_CUSP) : int(Inkscape::SNAPSOURCE_NODE_CUSP);
+               p.push_back(std::make_pair(path_it->initialPoint() * i2d, type));
+        }
 
         Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
         Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
@@ -1066,37 +1198,41 @@ static void sp_shape_snappoints(SPItem const *item, SnapPointsIter p, Inkscape::
 
             Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, *curve_it2);
 
-            // Depending on the snapping preferences, either add only cusp nodes, or add add both cusp and smooth nodes
-            if (snapprefs->getSnapSmoothNodes() || nodetype == Geom::NODE_NONE || nodetype == Geom::NODE_CUSP) {
-                *p = from_2geom(curve_it1->finalPoint() * i2d);
-            }
+            bool c1 = snapprefs->getSnapToItemNode() && (nodetype == Geom::NODE_CUSP || nodetype == Geom::NODE_NONE);
+            bool c2 = snapprefs->getSnapSmoothNodes() && (nodetype == Geom::NODE_SMOOTH || nodetype == Geom::NODE_SYMM);
 
-            // Consider midpoints of line segments for snapping
-            if (snapprefs->getSnapMidpoints()) {
-                if (Geom::LineSegment const* line_segment = dynamic_cast<Geom::LineSegment const*>(&(*curve_it1))) {
-                    *p = from_2geom(Geom::middle_point(*line_segment) * i2d);
-                }
+            if (c1 || c2) {
+               type = target ? int(Inkscape::SNAPTARGET_NODE_CUSP) : int(Inkscape::SNAPSOURCE_NODE_CUSP);
+                               p.push_back(std::make_pair(curve_it1->finalPoint() * i2d, type));
             }
 
+                       // Consider midpoints of line segments for snapping
+                       if (snapprefs->getSnapLineMidpoints()) { // only do this when we're snapping nodes (enforce strict snapping)
+                               if (Geom::LineSegment const* line_segment = dynamic_cast<Geom::LineSegment const*>(&(*curve_it1))) {
+                                       type = target ? int(Inkscape::SNAPTARGET_LINE_MIDPOINT) : int(Inkscape::SNAPSOURCE_LINE_MIDPOINT);
+                                       p.push_back(std::make_pair(Geom::middle_point(*line_segment) * i2d, type));
+                               }
+                       }
+
             ++curve_it1;
             ++curve_it2;
         }
 
-        // Find the internal intersections of each path and consider these for snapping (using "Method 1" as desciribed in Inkscape::ObjectSnapper::_collectNodes())
+        // Find the internal intersections of each path and consider these for snapping
+        // (using "Method 1" as described in Inkscape::ObjectSnapper::_collectNodes())
         if (snapprefs->getSnapIntersectionCS()) {
             Geom::Crossings cs;
             cs = self_crossings(*path_it);
             if (cs.size() > 0) { // There might be multiple intersections...
                 for (Geom::Crossings::const_iterator i = cs.begin(); i != cs.end(); i++) {
                     Geom::Point p_ix = (*path_it).pointAt((*i).ta);
-                    *p = from_2geom(p_ix * i2d);
+                    type = target ? int(Inkscape::SNAPTARGET_PATH_INTERSECTION) : int(Inkscape::SNAPSOURCE_PATH_INTERSECTION);
+                    p.push_back(std::make_pair(p_ix * i2d, type));
                 }
             }
         }
     }
 
-
-
 }
 
 /*