Restoring with rename change... urg svn

diff --git a/src/sp-marker.cpp b/src/sp-marker.cpp
new file mode 100644 (file)
index 0000000..68b6309
--- /dev/null
+++ b/src/sp-marker.cpp
@@ -0,0 +1,711 @@
+#define __SP_MARKER_C__
+
+/*
+ * SVG <marker> implementation
+ *
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *
+ * Copyright (C) 1999-2003 Lauris Kaplinski
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "config.h"
+
+
+#include "libnr/nr-matrix-fns.h"
+#include "libnr/nr-matrix-ops.h"
+#include "libnr/nr-scale-matrix-ops.h"
+#include "libnr/nr-rotate-fns.h"
+#include "svg/svg.h"
+#include "display/nr-arena-group.h"
+#include "xml/repr.h"
+#include "attributes.h"
+#include "marker.h"
+
+struct SPMarkerView {
+       SPMarkerView *next;
+       unsigned int key;
+       unsigned int size;
+       NRArenaItem *items[1];
+};
+
+static void sp_marker_class_init (SPMarkerClass *klass);
+static void sp_marker_init (SPMarker *marker);
+
+static void sp_marker_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
+static void sp_marker_release (SPObject *object);
+static void sp_marker_set (SPObject *object, unsigned int key, const gchar *value);
+static void sp_marker_update (SPObject *object, SPCtx *ctx, guint flags);
+static Inkscape::XML::Node *sp_marker_write (SPObject *object, Inkscape::XML::Node *repr, guint flags);
+
+static NRArenaItem *sp_marker_private_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags);
+static void sp_marker_private_hide (SPItem *item, unsigned int key);
+static void sp_marker_bbox(SPItem const *item, NRRect *bbox, NR::Matrix const &transform, unsigned const flags);
+static void sp_marker_print (SPItem *item, SPPrintContext *ctx);
+
+static void sp_marker_view_remove (SPMarker *marker, SPMarkerView *view, unsigned int destroyitems);
+
+static SPGroupClass *parent_class;
+
+/**
+ * Registers the SPMarker class with Gdk and returns its type number.
+ */
+GType
+sp_marker_get_type (void)
+{
+       static GType type = 0;
+       if (!type) {
+               GTypeInfo info = {
+                       sizeof (SPMarkerClass),
+                       NULL, NULL,
+                       (GClassInitFunc) sp_marker_class_init,
+                       NULL, NULL,
+                       sizeof (SPMarker),
+                       16,
+                       (GInstanceInitFunc) sp_marker_init,
+                       NULL,   /* value_table */
+               };
+               type = g_type_register_static (SP_TYPE_GROUP, "SPMarker", &info, (GTypeFlags)0);
+       }
+       return type;
+}
+
+/**
+ * Initializes a SPMarkerClass object.  Establishes the function pointers to the class' 
+ * member routines in the class vtable, and sets pointers to parent classes.
+ */
+static void
+sp_marker_class_init (SPMarkerClass *klass)
+{
+       GObjectClass *object_class;
+       SPObjectClass *sp_object_class;
+       SPItemClass *sp_item_class;
+
+       object_class = G_OBJECT_CLASS (klass);
+       sp_object_class = (SPObjectClass *) klass;
+       sp_item_class = (SPItemClass *) klass;
+
+       parent_class = (SPGroupClass *)g_type_class_ref (SP_TYPE_GROUP);
+
+       sp_object_class->build = sp_marker_build;
+       sp_object_class->release = sp_marker_release;
+       sp_object_class->set = sp_marker_set;
+       sp_object_class->update = sp_marker_update;
+       sp_object_class->write = sp_marker_write;
+
+       sp_item_class->show = sp_marker_private_show;
+       sp_item_class->hide = sp_marker_private_hide;
+       sp_item_class->bbox = sp_marker_bbox;
+       sp_item_class->print = sp_marker_print;
+}
+
+/**
+ * Initializes an SPMarker object.  This notes the marker's viewBox is
+ * not set and initializes the marker's c2p identity matrix.
+ */
+static void
+sp_marker_init (SPMarker *marker)
+{
+       marker->viewBox_set = FALSE;
+
+       nr_matrix_set_identity (&marker->c2p);
+}
+
+/**
+ * Virtual build callback for SPMarker.
+ *
+ * This is to be invoked immediately after creation of an SPMarker.  This
+ * method fills an SPMarker object with its SVG attributes, and calls the
+ * parent class' build routine to attach the object to its document and 
+ * repr.  The result will be creation of the whole document tree.
+ *
+ * \see sp_object_build()
+ */
+static void
+sp_marker_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
+{
+       SPGroup *group;
+       SPMarker *marker;
+
+       group = (SPGroup *) object;
+       marker = (SPMarker *) object;
+
+       sp_object_read_attr (object, "markerUnits");
+       sp_object_read_attr (object, "refX");
+       sp_object_read_attr (object, "refY");
+       sp_object_read_attr (object, "markerWidth");
+       sp_object_read_attr (object, "markerHeight");
+       sp_object_read_attr (object, "orient");
+       sp_object_read_attr (object, "viewBox");
+       sp_object_read_attr (object, "preserveAspectRatio");
+
+       if (((SPObjectClass *) parent_class)->build)
+               ((SPObjectClass *) parent_class)->build (object, document, repr);
+}
+
+/**
+ * Removes, releases and unrefs all children of object
+ *
+ * This is the inverse of sp_marker_build().  It must be invoked as soon
+ * as the marker is removed from the tree, even if it is still referenced
+ * by other objects.  It hides and removes any views of the marker, then
+ * calls the parent classes' release function to deregister the object
+ * and release its SPRepr bindings.  The result will be the destruction
+ * of the entire document tree.
+ *
+ * \see sp_object_release()
+ */
+static void
+sp_marker_release (SPObject *object)
+{
+       SPMarker *marker;
+
+       marker = (SPMarker *) object;
+
+       while (marker->views) {
+               /* Destroy all NRArenaitems etc. */
+               /* Parent class ::hide method */
+               ((SPItemClass *) parent_class)->hide ((SPItem *) marker, marker->views->key);
+               sp_marker_view_remove (marker, marker->views, TRUE);
+       }
+
+       if (((SPObjectClass *) parent_class)->release)
+               ((SPObjectClass *) parent_class)->release (object);
+}
+
+/**
+ * Sets an attribute, 'key', of a marker object to 'value'.  Supported
+ * attributes that can be set with this routine include:
+ *
+ *     SP_ATTR_MARKERUNITS
+ *     SP_ATTR_REFX
+ *     SP_ATTR_REFY
+ *     SP_ATTR_MARKERWIDTH
+ *     SP_ATTR_MARKERHEIGHT
+ *     SP_ATTR_ORIENT
+ *     SP_ATTR_VIEWBOX
+ *     SP_ATTR_PRESERVEASPECTRATIO
+ */
+static void
+sp_marker_set (SPObject *object, unsigned int key, const gchar *value)
+{
+       SPItem *item;
+       SPMarker *marker;
+
+       item = SP_ITEM (object);
+       marker = SP_MARKER (object);
+
+       switch (key) {
+       case SP_ATTR_MARKERUNITS:
+               marker->markerUnits_set = FALSE;
+               marker->markerUnits = SP_MARKER_UNITS_STROKEWIDTH;
+               if (value) {
+                       if (!strcmp (value, "strokeWidth")) {
+                               marker->markerUnits_set = TRUE;
+                       } else if (!strcmp (value, "userSpaceOnUse")) {
+                               marker->markerUnits = SP_MARKER_UNITS_USERSPACEONUSE;
+                               marker->markerUnits_set = TRUE;
+                       }
+               }
+               object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
+               break;
+       case SP_ATTR_REFX:
+               marker->refX.readOrUnset(value);
+               object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+               break;
+       case SP_ATTR_REFY:
+               marker->refY.readOrUnset(value);
+               object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+               break;
+       case SP_ATTR_MARKERWIDTH:
+               marker->markerWidth.readOrUnset(value, SVGLength::NONE, 3.0, 3.0);
+               object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+               break;
+       case SP_ATTR_MARKERHEIGHT:
+               marker->markerHeight.readOrUnset(value, SVGLength::NONE, 3.0, 3.0);
+               object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+               break;
+       case SP_ATTR_ORIENT:
+               marker->orient_set = FALSE;
+               marker->orient_auto = FALSE;
+               marker->orient = 0.0;
+               if (value) {
+                       if (!strcmp (value, "auto")) {
+                               marker->orient_auto = TRUE;
+                               marker->orient_set = TRUE;
+                       } else if (sp_svg_number_read_f (value, &marker->orient)) {
+                               marker->orient_set = TRUE;
+                       }
+               }
+               object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+               break;
+       case SP_ATTR_VIEWBOX:
+               marker->viewBox_set = FALSE;
+               if (value) {
+                       double x, y, width, height;
+                       char *eptr;
+                       /* fixme: We have to take original item affine into account */
+                       /* fixme: Think (Lauris) */
+                       eptr = (gchar *) value;
+                       x = g_ascii_strtod (eptr, &eptr);
+                       while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
+                       y = g_ascii_strtod (eptr, &eptr);
+                       while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
+                       width = g_ascii_strtod (eptr, &eptr);
+                       while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
+                       height = g_ascii_strtod (eptr, &eptr);
+                       while (*eptr && ((*eptr == ',') || (*eptr == ' '))) eptr++;
+                       if ((width > 0) && (height > 0)) {
+                               /* Set viewbox */
+                               marker->viewBox.x0 = x;
+                               marker->viewBox.y0 = y;
+                               marker->viewBox.x1 = x + width;
+                               marker->viewBox.y1 = y + height;
+                               marker->viewBox_set = TRUE;
+                       }
+               }
+               object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
+               break;
+       case SP_ATTR_PRESERVEASPECTRATIO:
+               /* Do setup before, so we can use break to escape */
+               marker->aspect_set = FALSE;
+               marker->aspect_align = SP_ASPECT_NONE;
+               marker->aspect_clip = SP_ASPECT_MEET;
+               object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG);
+               if (value) {
+                       int len;
+                       gchar c[256];
+                       const gchar *p, *e;
+                       unsigned int align, clip;
+                       p = value;
+                       while (*p && *p == 32) p += 1;
+                       if (!*p) break;
+                       e = p;
+                       while (*e && *e != 32) e += 1;
+                       len = e - p;
+                       if (len > 8) break;
+                       memcpy (c, value, len);
+                       c[len] = 0;
+                       /* Now the actual part */
+                       if (!strcmp (c, "none")) {
+                               align = SP_ASPECT_NONE;
+                       } else if (!strcmp (c, "xMinYMin")) {
+                               align = SP_ASPECT_XMIN_YMIN;
+                       } else if (!strcmp (c, "xMidYMin")) {
+                               align = SP_ASPECT_XMID_YMIN;
+                       } else if (!strcmp (c, "xMaxYMin")) {
+                               align = SP_ASPECT_XMAX_YMIN;
+                       } else if (!strcmp (c, "xMinYMid")) {
+                               align = SP_ASPECT_XMIN_YMID;
+                       } else if (!strcmp (c, "xMidYMid")) {
+                               align = SP_ASPECT_XMID_YMID;
+                       } else if (!strcmp (c, "xMaxYMin")) {
+                               align = SP_ASPECT_XMAX_YMID;
+                       } else if (!strcmp (c, "xMinYMax")) {
+                               align = SP_ASPECT_XMIN_YMAX;
+                       } else if (!strcmp (c, "xMidYMax")) {
+                               align = SP_ASPECT_XMID_YMAX;
+                       } else if (!strcmp (c, "xMaxYMax")) {
+                               align = SP_ASPECT_XMAX_YMAX;
+                       } else {
+                               break;
+                       }
+                       clip = SP_ASPECT_MEET;
+                       while (*e && *e == 32) e += 1;
+                       if (e) {
+                               if (!strcmp (e, "meet")) {
+                                       clip = SP_ASPECT_MEET;
+                               } else if (!strcmp (e, "slice")) {
+                                       clip = SP_ASPECT_SLICE;
+                               } else {
+                                       break;
+                               }
+                       }
+                       marker->aspect_set = TRUE;
+                       marker->aspect_align = align;
+                       marker->aspect_clip = clip;
+               }
+               break;
+       default:
+               if (((SPObjectClass *) parent_class)->set)
+                       ((SPObjectClass *) parent_class)->set (object, key, value);
+               break;
+       }
+}
+
+/**
+ * Updates <marker> when its attributes have changed.  Takes care of setting up
+ * transformations and viewBoxes.
+ */
+static void
+sp_marker_update (SPObject *object, SPCtx *ctx, guint flags)
+{
+       SPItem *item;
+       SPMarker *marker;
+       SPItemCtx rctx;
+       NRRect *vb;
+       double x, y, width, height;
+       NRMatrix q;
+       SPMarkerView *v;
+
+       item = SP_ITEM (object);
+       marker = SP_MARKER (object);
+
+       /* fixme: We have to set up clip here too */
+
+       /* Copy parent context */
+       rctx.ctx = *ctx;
+       /* Initialize tranformations */
+       rctx.i2doc = NR::identity();
+       rctx.i2vp = NR::identity();
+       /* Set up viewport */
+       rctx.vp.x0 = 0.0;
+       rctx.vp.y0 = 0.0;
+       rctx.vp.x1 = marker->markerWidth.computed;
+       rctx.vp.y1 = marker->markerHeight.computed;
+
+       /* Start with identity transform */
+       nr_matrix_set_identity (&marker->c2p);
+
+       /* Viewbox is always present, either implicitly or explicitly */
+       if (marker->viewBox_set) {
+               vb = &marker->viewBox;
+       } else {
+               vb = &rctx.vp;
+       }
+       /* Now set up viewbox transformation */
+       /* Determine actual viewbox in viewport coordinates */
+       if (marker->aspect_align == SP_ASPECT_NONE) {
+               x = 0.0;
+               y = 0.0;
+               width = rctx.vp.x1 - rctx.vp.x0;
+               height = rctx.vp.y1 - rctx.vp.y0;
+       } else {
+               double scalex, scaley, scale;
+               /* Things are getting interesting */
+               scalex = (rctx.vp.x1 - rctx.vp.x0) / (vb->x1 - vb->x0);
+               scaley = (rctx.vp.y1 - rctx.vp.y0) / (vb->y1 - vb->y0);
+               scale = (marker->aspect_clip == SP_ASPECT_MEET) ? MIN (scalex, scaley) : MAX (scalex, scaley);
+               width = (vb->x1 - vb->x0) * scale;
+               height = (vb->y1 - vb->y0) * scale;
+               /* Now place viewbox to requested position */
+               switch (marker->aspect_align) {
+               case SP_ASPECT_XMIN_YMIN:
+                       x = 0.0;
+                       y = 0.0;
+                       break;
+               case SP_ASPECT_XMID_YMIN:
+                       x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+                       y = 0.0;
+                       break;
+               case SP_ASPECT_XMAX_YMIN:
+                       x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+                       y = 0.0;
+                       break;
+               case SP_ASPECT_XMIN_YMID:
+                       x = 0.0;
+                       y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+                       break;
+               case SP_ASPECT_XMID_YMID:
+                       x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+                       y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+                       break;
+               case SP_ASPECT_XMAX_YMID:
+                       x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+                       y = 0.5 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+                       break;
+               case SP_ASPECT_XMIN_YMAX:
+                       x = 0.0;
+                       y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+                       break;
+               case SP_ASPECT_XMID_YMAX:
+                       x = 0.5 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+                       y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+                       break;
+               case SP_ASPECT_XMAX_YMAX:
+                       x = 1.0 * ((rctx.vp.x1 - rctx.vp.x0) - width);
+                       y = 1.0 * ((rctx.vp.y1 - rctx.vp.y0) - height);
+                       break;
+               default:
+                       x = 0.0;
+                       y = 0.0;
+                       break;
+               }
+       }
+       /* Compose additional transformation from scale and position */
+       q.c[0] = width / (vb->x1 - vb->x0);
+       q.c[1] = 0.0;
+       q.c[2] = 0.0;
+       q.c[3] = height / (vb->y1 - vb->y0);
+       q.c[4] = -vb->x0 * q.c[0] + x;
+       q.c[5] = -vb->y0 * q.c[3] + y;
+       /* Append viewbox transformation */
+       nr_matrix_multiply (&marker->c2p, &q, &marker->c2p);
+
+
+       /* Append reference translation */
+       /* fixme: lala (Lauris) */
+       nr_matrix_set_translate (&q, -marker->refX.computed, -marker->refY.computed);
+       nr_matrix_multiply (&marker->c2p, &q, &marker->c2p);
+
+       rctx.i2doc = marker->c2p * rctx.i2doc;
+
+       /* If viewBox is set reinitialize child viewport */
+       /* Otherwise it already correct */
+       if (marker->viewBox_set) {
+               rctx.vp.x0 = marker->viewBox.x0;
+               rctx.vp.y0 = marker->viewBox.y0;
+               rctx.vp.x1 = marker->viewBox.x1;
+               rctx.vp.y1 = marker->viewBox.y1;
+               rctx.i2vp = NR::identity();
+       }
+
+       /* And invoke parent method */
+       if (((SPObjectClass *) (parent_class))->update)
+               ((SPObjectClass *) (parent_class))->update (object, (SPCtx *) &rctx, flags);
+
+       /* As last step set additional transform of arena group */
+       for (v = marker->views; v != NULL; v = v->next) {
+               for (unsigned i = 0 ; i < v->size ; i++) {
+                       if (v->items[i]) {
+                               nr_arena_group_set_child_transform(NR_ARENA_GROUP(v->items[i]), &marker->c2p);
+                       }
+               }
+       }
+}
+
+/** 
+ * Writes the object's properties into its repr object.
+ */
+static Inkscape::XML::Node *
+sp_marker_write (SPObject *object, Inkscape::XML::Node *repr, guint flags)
+{
+       SPMarker *marker;
+
+       marker = SP_MARKER (object);
+
+       if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) {
+               repr = sp_repr_new ("svg:marker");
+       }
+
+       if (marker->markerUnits_set) {
+               if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
+                       repr->setAttribute("markerUnits", "strokeWidth");
+               } else {
+                       repr->setAttribute("markerUnits", "userSpaceOnUse");
+               }
+       } else {
+               repr->setAttribute("markerUnits", NULL);
+       }
+       if (marker->refX._set) {
+               sp_repr_set_svg_double(repr, "refX", marker->refX.computed);
+       } else {
+               repr->setAttribute("refX", NULL);
+       }
+       if (marker->refY._set) {
+               sp_repr_set_svg_double (repr, "refY", marker->refY.computed);
+       } else {
+               repr->setAttribute("refY", NULL);
+       }
+       if (marker->markerWidth._set) {
+               sp_repr_set_svg_double (repr, "markerWidth", marker->markerWidth.computed);
+       } else {
+               repr->setAttribute("markerWidth", NULL);
+       }
+       if (marker->markerHeight._set) {
+               sp_repr_set_svg_double (repr, "markerHeight", marker->markerHeight.computed);
+       } else {
+               repr->setAttribute("markerHeight", NULL);
+       }
+       if (marker->orient_set) {
+               if (marker->orient_auto) {
+                       repr->setAttribute("orient", "auto");
+               } else {
+                       sp_repr_set_css_double(repr, "orient", marker->orient);
+               }
+       } else {
+               repr->setAttribute("orient", NULL);
+       }
+       /* fixme: */
+       repr->setAttribute("viewBox", object->repr->attribute("viewBox"));
+       repr->setAttribute("preserveAspectRatio", object->repr->attribute("preserveAspectRatio"));
+
+       if (((SPObjectClass *) (parent_class))->write)
+               ((SPObjectClass *) (parent_class))->write (object, repr, flags);
+
+       return repr;
+}
+
+/**
+ * This routine is disabled to break propagation.
+ */
+static NRArenaItem *
+sp_marker_private_show (SPItem *item, NRArena *arena, unsigned int key, unsigned int flags)
+{
+       /* Break propagation */
+       return NULL;
+}
+
+/**
+ * This routine is disabled to break propagation.
+ */
+static void
+sp_marker_private_hide (SPItem *item, unsigned int key)
+{
+       /* Break propagation */
+}
+
+/**
+ * This routine is disabled to break propagation.
+ */
+static void
+sp_marker_bbox(SPItem const *, NRRect *, NR::Matrix const &, unsigned const)
+{
+       /* Break propagation */
+}
+
+/**
+ * This routine is disabled to break propagation.
+ */
+static void
+sp_marker_print (SPItem *item, SPPrintContext *ctx)
+{
+       /* Break propagation */
+}
+
+/* fixme: Remove link if zero-sized (Lauris) */
+
+/**
+ * Removes any SPMarkerViews that a marker has with a specific key.
+ * Set up the NRArenaItem array's size in the specified SPMarker's SPMarkerView.
+ * This is called from sp_shape_update() for shapes that have markers.  It
+ * removes the old view of the marker and establishes a new one, registering
+ * it with the marker's list of views for future updates.
+ * 
+ * \param marker Marker to create views in.
+ * \param key Key to give each SPMarkerView.
+ * \param size Number of NRArenaItems to put in the SPMarkerView.
+ */
+void
+sp_marker_show_dimension (SPMarker *marker, unsigned int key, unsigned int size)
+{
+       SPMarkerView *view;
+       unsigned int i;
+
+       for (view = marker->views; view != NULL; view = view->next) {
+               if (view->key == key) break;
+       }
+       if (view && (view->size != size)) {
+               /* Free old view and allocate new */
+               /* Parent class ::hide method */
+               ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
+               sp_marker_view_remove (marker, view, TRUE);
+               view = NULL;
+       }
+       if (!view) {
+               view = (SPMarkerView *)g_malloc (sizeof (SPMarkerView) + (size) * sizeof (NRArenaItem *));
+               for (i = 0; i < size; i++) view->items[i] = NULL;
+               view->next = marker->views;
+               marker->views = view;
+               view->key = key;
+               view->size = size;
+       }
+}
+
+/** 
+ * Shows an instance of a marker.  This is called during sp_shape_update_marker_view()
+ * show and transform a child item in the arena for all views with the given key.
+ */
+NRArenaItem *
+sp_marker_show_instance (SPMarker *marker, NRArenaItem *parent,
+                        unsigned int key, unsigned int pos,
+                        NR::Matrix const &base, float linewidth)
+{
+       for (SPMarkerView *v = marker->views; v != NULL; v = v->next) {
+               if (v->key == key) {
+                       if (pos >= v->size) {
+                         return NULL;
+                       }
+                       if (!v->items[pos]) {
+                               /* Parent class ::show method */
+                               v->items[pos] = ((SPItemClass *) parent_class)->show ((SPItem *) marker,
+                                                                                     parent->arena, key,
+                                                                                     SP_ITEM_REFERENCE_FLAGS);
+                               if (v->items[pos]) {
+                                       /* fixme: Position (Lauris) */
+                                       nr_arena_item_add_child (parent, v->items[pos], NULL);
+                                       /* nr_arena_item_unref (v->items[pos]); */
+                                       nr_arena_group_set_child_transform((NRArenaGroup *) v->items[pos], &marker->c2p);
+                               }
+                       }
+                       if (v->items[pos]) {
+                               NR::Matrix m;
+                               if (marker->orient_auto) {
+                                       m = base;
+                               } else {
+                                       /* fixme: Orient units (Lauris) */
+                                       m = NR::Matrix(rotate_degrees(marker->orient));
+                                       m *= get_translation(base);
+                               }
+                               if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
+                                       m = NR::scale(linewidth) * m;
+                               }
+
+                               nr_arena_item_set_transform(v->items[pos], m);
+                       }
+                       return v->items[pos];
+               }
+       }
+
+       return NULL;
+}
+
+/**
+ * Hides/removes all views of the given marker that have key 'key'.
+ * This replaces SPItem implementation because we have our own views
+ * \param key SPMarkerView key to hide.
+ */
+void
+sp_marker_hide (SPMarker *marker, unsigned int key)
+{
+       SPMarkerView *v;
+
+       v = marker->views;
+       while (v != NULL) {
+               SPMarkerView *next;
+               next = v->next;
+               if (v->key == key) {
+                       /* Parent class ::hide method */
+                       ((SPItemClass *) parent_class)->hide ((SPItem *) marker, key);
+                       sp_marker_view_remove (marker, v, TRUE);
+                       return;
+               }
+               v = next;
+       }
+}
+
+/**
+ * Removes a given view.  Also will destroy sub-items in the view if destroyitems 
+ * is set to a non-zero value.
+ */
+static void
+sp_marker_view_remove (SPMarker *marker, SPMarkerView *view, unsigned int destroyitems)
+{
+       unsigned int i;
+       if (view == marker->views) {
+               marker->views = view->next;
+       } else {
+               SPMarkerView *v;
+               for (v = marker->views; v->next != view; v = v->next) if (!v->next) return;
+               v->next = view->next;
+       }
+       if (destroyitems) {
+               for (i = 0; i < view->size; i++) {
+                       /* We have to walk through the whole array because there may be hidden items */
+                       if (view->items[i]) nr_arena_item_unref (view->items[i]);
+               }
+       }
+       g_free (view);
+}