/* * Base class for shapes, including element * * Author: * Lauris Kaplinski * * Copyright (C) 1999-2002 Lauris Kaplinski * Copyright (C) 2000-2001 Ximian, Inc. * Copyright (C) 2004 John Cliff * Copyright (C) 2007-2008 Johan Engelen * * Released under GNU GPL, read the file 'COPYING' for more information */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include <2geom/rect.h> #include <2geom/transforms.h> #include <2geom/pathvector.h> #include <2geom/path-intersection.h> #include "helper/geom.h" #include "helper/geom-nodetype.h" #include #include #include "macros.h" #include "display/nr-arena-shape.h" #include "display/curve.h" #include "print.h" #include "document.h" #include "style.h" #include "marker.h" #include "sp-path.h" #include "preferences.h" #include "attributes.h" #include "live_effects/lpeobject.h" #include "uri.h" #include "extract-uri.h" #include "uri-references.h" #include "bad-uri-exception.h" #include "xml/repr.h" #include "util/mathfns.h" // for triangle_area() #define noSHAPE_VERBOSE static void sp_shape_class_init (SPShapeClass *klass); static void sp_shape_init (SPShape *shape); static void sp_shape_finalize (GObject *object); static void sp_shape_build (SPObject * object, SPDocument * document, Inkscape::XML::Node * repr); static void sp_shape_release (SPObject *object); static void sp_shape_set(SPObject *object, unsigned key, gchar const *value); static void sp_shape_update (SPObject *object, SPCtx *ctx, unsigned int flags); static void sp_shape_modified (SPObject *object, unsigned int flags); static Inkscape::XML::Node *sp_shape_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags); static void sp_shape_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags); 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, bool const target, SnapPointsWithType &p, Inkscape::SnapPreferences const *snapprefs); static void sp_shape_update_marker_view (SPShape *shape, NRArenaItem *ai); static SPLPEItemClass *parent_class; /** * Registers the SPShape class with Gdk and returns its type number. */ GType sp_shape_get_type (void) { static GType type = 0; if (!type) { GTypeInfo info = { sizeof (SPShapeClass), NULL, NULL, (GClassInitFunc) sp_shape_class_init, NULL, NULL, sizeof (SPShape), 16, (GInstanceInitFunc) sp_shape_init, NULL, /* value_table */ }; type = g_type_register_static (SP_TYPE_LPE_ITEM, "SPShape", &info, (GTypeFlags)0); } return type; } /** * Initializes a SPShapeClass object. Establishes the function pointers to the class' * member routines in the class vtable, and sets pointers to parent classes. */ static void sp_shape_class_init (SPShapeClass *klass) { GObjectClass *gobject_class = G_OBJECT_CLASS(klass); SPObjectClass *sp_object_class = SP_OBJECT_CLASS(klass); SPItemClass * item_class = SP_ITEM_CLASS(klass); SPLPEItemClass * lpe_item_class = SP_LPE_ITEM_CLASS(klass); parent_class = (SPLPEItemClass *)g_type_class_peek_parent (klass); gobject_class->finalize = sp_shape_finalize; sp_object_class->build = sp_shape_build; sp_object_class->release = sp_shape_release; sp_object_class->set = sp_shape_set; sp_object_class->update = sp_shape_update; sp_object_class->modified = sp_shape_modified; sp_object_class->write = sp_shape_write; item_class->bbox = sp_shape_bbox; item_class->print = sp_shape_print; item_class->show = sp_shape_show; item_class->hide = sp_shape_hide; item_class->snappoints = sp_shape_snappoints; lpe_item_class->update_patheffect = NULL; klass->set_shape = NULL; } /** * Initializes an SPShape object. */ static void 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 sp_shape_finalize (GObject *object) { SPShape *shape=(SPShape *)object; for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) { shape->release_connect[i].disconnect(); shape->release_connect[i].~connection(); shape->modified_connect[i].disconnect(); shape->modified_connect[i].~connection(); } if (((GObjectClass *) (parent_class))->finalize) { (* ((GObjectClass *) (parent_class))->finalize)(object); } } /** * Virtual build callback for SPMarker. * * This is to be invoked immediately after creation of an SPShape. * * \see sp_object_build() */ static void sp_shape_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr) { if (((SPObjectClass *) (parent_class))->build) { (*((SPObjectClass *) (parent_class))->build) (object, document, repr); } for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) { sp_shape_set_marker (object, i, object->style->marker[i].value); } } /** * Removes, releases and unrefs all children of object * * This is the inverse of sp_shape_build(). It must be invoked as soon * as the shape is removed from the tree, even if it is still referenced * by other objects. This routine also disconnects/unrefs markers and * curves attached to it. * * \see sp_object_release() */ static void sp_shape_release (SPObject *object) { SPItem *item; SPShape *shape; SPItemView *v; int i; item = (SPItem *) object; shape = (SPShape *) object; 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); } } if (shape->curve) { shape->curve = shape->curve->unref(); } if (((SPObjectClass *) parent_class)->release) { ((SPObjectClass *) parent_class)->release (object); } } static void sp_shape_set(SPObject *object, unsigned int key, gchar const *value) { if (((SPObjectClass *) parent_class)->set) { ((SPObjectClass *) parent_class)->set(object, key, value); } } static Inkscape::XML::Node * sp_shape_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags) { if (((SPObjectClass *)(parent_class))->write) { ((SPObjectClass *)(parent_class))->write(object, doc, repr, flags); } return repr; } /** * Updates the shape when its attributes have changed. Also establishes * marker objects to match the style settings. */ static void sp_shape_update (SPObject *object, SPCtx *ctx, unsigned int flags) { SPItem *item = (SPItem *) object; SPShape *shape = (SPShape *) object; if (((SPObjectClass *) (parent_class))->update) { (* ((SPObjectClass *) (parent_class))->update) (object, ctx, flags); } /* This stanza checks that an object's marker style agrees with * the marker objects it has allocated. sp_shape_set_marker ensures * that the appropriate marker objects are present (or absent) to * match the style. */ for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) { sp_shape_set_marker (object, i, object->style->marker[i].value); } if (flags & (SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) { SPStyle *style; style = SP_OBJECT_STYLE (object); if (style->stroke_width.unit == SP_CSS_UNIT_PERCENT) { SPItemCtx *ictx = (SPItemCtx *) ctx; double const aw = 1.0 / NR::expansion(ictx->i2vp); style->stroke_width.computed = style->stroke_width.value * aw; for (SPItemView *v = ((SPItem *) (shape))->display; v != NULL; v = v->next) { nr_arena_shape_set_style ((NRArenaShape *) v->arenaitem, style); } } } if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_PARENT_MODIFIED_FLAG)) { /* This is suboptimal, because changing parent style schedules recalculation */ /* But on the other hand - how can we know that parent does not tie style and transform */ Geom::OptRect paintbox = SP_ITEM(object)->getBounds(Geom::identity(), SPItem::GEOMETRIC_BBOX); for (SPItemView *v = SP_ITEM (shape)->display; v != NULL; v = v->next) { NRArenaShape * const s = NR_ARENA_SHAPE(v->arenaitem); if (flags & SP_OBJECT_MODIFIED_FLAG) { nr_arena_shape_set_path(s, shape->curve, (flags & SP_OBJECT_USER_MODIFIED_FLAG_B)); } if (paintbox) { s->setPaintBox(*paintbox); } } } if (sp_shape_has_markers (shape)) { /* Dimension marker views */ for (SPItemView *v = item->display; v != NULL; v = v->next) { if (!v->arenaitem->key) { NR_ARENA_ITEM_SET_KEY (v->arenaitem, sp_item_display_key_new (SP_MARKER_LOC_QTY)); } 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_shape_number_of_markers (shape, i)); } } } /* Update marker views */ for (SPItemView *v = item->display; v != NULL; v = v->next) { sp_shape_update_marker_view (shape, v->arenaitem); } } } /** * Calculate the transform required to get a marker's path object in the * right place for particular path segment on a shape. * * \see sp_shape_marker_update_marker_view. * * From SVG spec: * The axes of the temporary new user coordinate system are aligned according to the orient attribute on the 'marker' * element and the slope of the curve at the given vertex. (Note: if there is a discontinuity at a vertex, the slope * is the average of the slopes of the two segments of the curve that join at the given vertex. If a slope cannot be * determined, the slope is assumed to be zero.) * * Reference: http://www.w3.org/TR/SVG11/painting.html#MarkerElement, the `orient' attribute. * Reference for behaviour of zero-length segments: * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */ Geom::Matrix sp_shape_marker_get_transform(Geom::Curve const & c1, Geom::Curve const & c2) { Geom::Point p = c1.pointAt(1); Geom::Curve * c1_reverse = c1.reverse(); Geom::Point tang1 = - c1_reverse->unitTangentAt(0); delete c1_reverse; Geom::Point tang2 = c2.unitTangentAt(0); double const angle1 = Geom::atan2(tang1); double const angle2 = Geom::atan2(tang2); double ret_angle; ret_angle = .5 * (angle1 + angle2); if ( fabs( angle2 - angle1 ) > M_PI ) { /* ret_angle is in the middle of the larger of the two sectors between angle1 and * angle2, so flip it by 180degrees to force it to the middle of the smaller sector. * * (Imagine a circle with rays drawn at angle1 and angle2 from the centre of the * circle. Those two rays divide the circle into two sectors.) */ ret_angle += M_PI; } return Geom::Rotate(ret_angle) * Geom::Translate(p); } Geom::Matrix sp_shape_marker_get_transform_at_start(Geom::Curve const & c) { Geom::Point p = c.pointAt(0); Geom::Matrix ret = Geom::Translate(p); if ( !c.isDegenerate() ) { Geom::Point tang = c.unitTangentAt(0); double const angle = Geom::atan2(tang); ret = Geom::Rotate(angle) * Geom::Translate(p); } else { /* FIXME: the svg spec says to search for a better alternative than zero angle directionality: * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */ } return ret; } Geom::Matrix sp_shape_marker_get_transform_at_end(Geom::Curve const & c) { Geom::Point p = c.pointAt(1); Geom::Matrix ret = Geom::Translate(p); if ( !c.isDegenerate() ) { Geom::Curve * c_reverse = c.reverse(); Geom::Point tang = - c_reverse->unitTangentAt(0); delete c_reverse; double const angle = Geom::atan2(tang); ret = Geom::Rotate(angle) * Geom::Translate(p); } else { /* FIXME: the svg spec says to search for a better alternative than zero angle directionality: * http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */ } return ret; } /** * Updates the instances (views) of a given marker in a shape. * Marker views have to be scaled already. The transformation * is retrieved and then shown by calling sp_marker_show_instance. * * @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) { SPStyle *style = ((SPObject *) shape)->style; // position arguments to sp_marker_show_instance, basically counts the amount of markers. 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) { // START position Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->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]++; } } // MID position if ( (shape->marker[SP_MARKER_LOC_MID] || shape->marker[SP_MARKER_LOC]) && (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; } } // END position 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". */ unsigned int index = path_it->size_default(); if (index > 0) { index--; } Geom::Curve const &lastcurve = (*path_it)[index]; Geom::Matrix const m = sp_shape_marker_get_transform_at_end(lastcurve); 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]++; } } } } } /** * Sets modified flag for all sub-item views. */ static void sp_shape_modified (SPObject *object, unsigned int flags) { SPShape *shape = SP_SHAPE (object); if (((SPObjectClass *) (parent_class))->modified) { (* ((SPObjectClass *) (parent_class))->modified) (object, flags); } if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) { for (SPItemView *v = SP_ITEM (shape)->display; v != NULL; v = v->next) { nr_arena_shape_set_style (NR_ARENA_SHAPE (v->arenaitem), object->style); } } } /** * Calculates the bounding box for item, storing it into bbox. * This also includes the bounding boxes of any markers included in the shape. */ static void sp_shape_bbox(SPItem const *item, NRRect *bbox, Geom::Matrix const &transform, unsigned const flags) { SPShape const *shape = SP_SHAPE (item); if (shape->curve) { Geom::OptRect geombbox = bounds_exact_transformed(shape->curve->get_pathvector(), transform); if (geombbox) { NRRect cbbox; cbbox.x0 = (*geombbox)[0][0]; cbbox.y0 = (*geombbox)[1][0]; cbbox.x1 = (*geombbox)[0][1]; cbbox.y1 = (*geombbox)[1][1]; if ((SPItem::BBoxType) flags != SPItem::GEOMETRIC_BBOX) { SPStyle* style=SP_OBJECT_STYLE (item); if (!style->stroke.isNone()) { double const scale = transform.descrim(); if ( fabs(style->stroke_width.computed * scale) > 0.01 ) { // sinon c'est 0=oon veut pas de bord double const width = MAX(0.125, style->stroke_width.computed * scale); if ( fabs(cbbox.x1-cbbox.x0) > -0.00001 && fabs(cbbox.y1-cbbox.y0) > -0.00001 ) { cbbox.x0-=0.5*width; cbbox.x1+=0.5*width; cbbox.y0-=0.5*width; cbbox.y1+=0.5*width; } } } // 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! */ Geom::PathVector const & pathv = shape->curve->get_pathvector(); for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) { 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)); 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; } // 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); } } for (unsigned i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID if ( shape->marker[i] && (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)); 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; } // 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); ++curve_it1; ++curve_it2; } } } 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)); /* 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); 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; // 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); } } } } } // copy our bbox to the variable we're given *bbox = cbbox; } } } 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, * applies print fill/stroke, sets transforms for markers, and adds * comment labels. */ void sp_shape_print (SPItem *item, SPPrintContext *ctx) { NRRect pbox, dbox, bbox; SPShape *shape = SP_SHAPE(item); if (!shape->curve) return; Inkscape::Preferences *prefs = Inkscape::Preferences::get(); gint add_comments = prefs->getBool("/printing/debug/add-label-comments"); if (add_comments) { gchar * comment = g_strdup_printf("begin '%s'", SP_OBJECT(item)->defaultLabel()); sp_print_comment(ctx, comment); g_free(comment); } /* fixme: Think (Lauris) */ 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)); dbox.y1 = sp_document_height (SP_OBJECT_DOCUMENT (item)); sp_item_bbox_desktop (item, &bbox); Geom::Matrix const i2d(sp_item_i2d_affine(item)); SPStyle* style = SP_OBJECT_STYLE (item); if (!style->fill.isNone()) { sp_print_fill (ctx, shape->curve->get_pathvector(), &i2d, style, &pbox, &dbox, &bbox); } if (!style->stroke.isNone()) { 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! */ 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] || shape->marker[SP_MARKER_LOC]) { Geom::Matrix tr(sp_shape_marker_get_transform_at_start(path_it->front())); if (shape->marker[SP_MARKER_LOC_START]) { sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC_START], tr, style, ctx); } if (shape->marker[SP_MARKER_LOC]) { sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC], tr, style, ctx); } } if ( (shape->marker[SP_MARKER_LOC_MID] || shape->marker[SP_MARKER_LOC]) && (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)); if (shape->marker[SP_MARKER_LOC_MID]) { sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC_MID], tr, style, ctx); } if (shape->marker[SP_MARKER_LOC]) { sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC], tr, style, ctx); } ++curve_it1; ++curve_it2; } } 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". */ 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); if (shape->marker[SP_MARKER_LOC_END]) { sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC_END], tr, style, ctx); } if (shape->marker[SP_MARKER_LOC]) { sp_shape_print_invoke_marker_printing(shape->marker[SP_MARKER_LOC], tr, style, ctx); } } } if (add_comments) { gchar * comment = g_strdup_printf("end '%s'", SP_OBJECT(item)->defaultLabel()); sp_print_comment(ctx, comment); g_free(comment); } } /** * Sets style, path, and paintbox. Updates marker views, including dimensions. */ static NRArenaItem * sp_shape_show (SPItem *item, NRArena *arena, unsigned int /*key*/, unsigned int /*flags*/) { SPObject *object = SP_OBJECT(item); SPShape *shape = SP_SHAPE(item); NRArenaItem *arenaitem = NRArenaShape::create(arena); NRArenaShape * const s = NR_ARENA_SHAPE(arenaitem); nr_arena_shape_set_style(s, object->style); nr_arena_shape_set_path(s, shape->curve, false); Geom::OptRect paintbox = item->getBounds(Geom::identity()); if (paintbox) { s->setPaintBox(*paintbox); } /* This stanza checks that an object's marker style agrees with * the marker objects it has allocated. sp_shape_set_marker ensures * that the appropriate marker objects are present (or absent) to * match the style. */ for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) { sp_shape_set_marker (object, i, object->style->marker[i].value); } if (sp_shape_has_markers (shape)) { /* provide key and dimension the marker views */ if (!arenaitem->key) { NR_ARENA_ITEM_SET_KEY (arenaitem, sp_item_display_key_new (SP_MARKER_LOC_QTY)); } 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_shape_number_of_markers (shape, i)); } } /* Update marker views */ sp_shape_update_marker_view (shape, arenaitem); } return arenaitem; } /** * Hides/removes marker views from the shape. */ static void sp_shape_hide (SPItem *item, unsigned int key) { SPShape *shape; SPItemView *v; int i; shape = (SPShape *) item; for (i=0; imarker[i]) { for (v = item->display; v != NULL; v = v->next) { if (key == v->key) { sp_marker_hide ((SPMarker *) shape->marker[i], NR_ARENA_ITEM_GET_KEY (v->arenaitem) + i); } } } } if (((SPItemClass *) parent_class)->hide) { ((SPItemClass *) parent_class)->hide (item, key); } } /** * \param shape Shape. * \return TRUE if the shape has any markers, or FALSE if not. */ int sp_shape_has_markers (SPShape const *shape) { /* Note, we're ignoring 'marker' settings, which technically should apply for all three settings. This should be fixed later such that if 'marker' is specified, then all three should appear. */ return ( shape->curve && (shape->marker[SP_MARKER_LOC] || shape->marker[SP_MARKER_LOC_START] || shape->marker[SP_MARKER_LOC_MID] || shape->marker[SP_MARKER_LOC_END]) ); } /** * \param shape Shape. * \param type Marker type (e.g. SP_MARKER_LOC_START) * \return Number of markers that the shape has of this type. */ int sp_shape_number_of_markers (SPShape *shape, int type) { Geom::PathVector const & pathv = shape->curve->get_pathvector(); switch(type) { case SP_MARKER_LOC: { if ( shape->marker[SP_MARKER_LOC] ) { guint n = 2*pathv.size(); 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; } return n; } else { return 0; } } case SP_MARKER_LOC_START: return shape->marker[SP_MARKER_LOC_START] ? pathv.size() : 0; case SP_MARKER_LOC_MID: { 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) { n += path_it->size(); n += path_it->closed() ? 1 : 0; } return n; } else { return 0; } } case SP_MARKER_LOC_END: { return shape->marker[SP_MARKER_LOC_END] ? pathv.size() : 0; } default: return 0; } } /** * Checks if the given marker is used in the shape, and if so, it * releases it by calling sp_marker_hide. Also detaches signals * and unrefs the marker from the shape. */ static void sp_shape_marker_release (SPObject *marker, SPShape *shape) { SPItem *item; int i; item = (SPItem *) shape; 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); } } } /** * No-op. Exists for handling 'modified' messages */ static void sp_shape_marker_modified (SPObject */*marker*/, guint /*flags*/, SPItem */*item*/) { /* I think mask does update automagically */ /* g_warning ("Item %s mask %s modified", SP_OBJECT_ID (item), SP_OBJECT_ID (mask)); */ } /** * Adds a new marker to shape object at the location indicated by key. value * must be a valid URI reference resolvable from the shape object (i.e., present * in the document ). If the shape object already has a marker * registered at the given position, it is removed first. Then the * new marker is hrefed and its signals connected. */ void 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_END) { return; } SPObject *mrk = sp_css_uri_reference_resolve (SP_OBJECT_DOCUMENT (object), value); if (mrk != shape->marker[key]) { if (shape->marker[key]) { SPItemView *v; /* Detach marker */ shape->release_connect[key].disconnect(); shape->modified_connect[key].disconnect(); /* Hide marker */ for (v = item->display; v != NULL; v = v->next) { sp_marker_hide ((SPMarker *) (shape->marker[key]), NR_ARENA_ITEM_GET_KEY (v->arenaitem) + key); /* fixme: Do we need explicit remove here? (Lauris) */ /* nr_arena_item_set_mask (v->arenaitem, NULL); */ } /* Unref marker */ shape->marker[key] = sp_object_hunref (shape->marker[key], object); } if (SP_IS_MARKER (mrk)) { shape->marker[key] = sp_object_href (mrk, object); shape->release_connect[key] = mrk->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_shape_marker_release), shape)); shape->modified_connect[key] = mrk->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_shape_marker_modified), shape)); } } } /* Shape section */ /** * Calls any registered handlers for the set_shape action */ void sp_shape_set_shape (SPShape *shape) { g_return_if_fail (shape != NULL); g_return_if_fail (SP_IS_SHAPE (shape)); if (SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (shape))->set_shape) { SP_SHAPE_CLASS (G_OBJECT_GET_CLASS (shape))->set_shape (shape); } } /** * Adds a curve to the shape. If owner is specified, a reference * will be made, otherwise the curve will be copied into the shape. * Any existing curve in the shape will be unreferenced first. * This routine also triggers a request to update the display. */ void sp_shape_set_curve (SPShape *shape, SPCurve *curve, unsigned int owner) { if (shape->curve) { shape->curve = shape->curve->unref(); } if (curve) { if (owner) { shape->curve = curve->ref(); } else { shape->curve = curve->copy(); } } SP_OBJECT(shape)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); } /** * Return duplicate of curve (if any exists) or NULL if there is no curve */ SPCurve * sp_shape_get_curve (SPShape *shape) { if (shape->curve) { return shape->curve->copy(); } return NULL; } /** * Same as sp_shape_set_curve but without updating the display */ void sp_shape_set_curve_insync (SPShape *shape, SPCurve *curve, unsigned int owner) { if (shape->curve) { shape->curve = shape->curve->unref(); } if (curve) { if (owner) { shape->curve = curve->ref(); } else { shape->curve = curve->copy(); } } } /** * Return all nodes in a path that are to be considered for snapping */ 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)); SPShape const *shape = SP_SHAPE(item); if (shape->curve == NULL) { 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) { 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 while (curve_it2 != path_it->end_closed()) { /* Test whether to add the node between curve_it1 and curve_it2. * Loop to end_closed (so always including closing segment); the last node to be added * is the node between the closing segment and the segment before that, regardless * of the path being closed or not. If the path is closed, the final point was already added by * adding the initial point. */ Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, *curve_it2); bool c1 = snapprefs->getSnapToItemNode() && (nodetype == Geom::NODE_CUSP || nodetype == Geom::NODE_NONE); bool c2 = snapprefs->getSnapSmoothNodes() && (nodetype == Geom::NODE_SMOOTH || nodetype == Geom::NODE_SYMM); 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(&(*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 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); type = target ? int(Inkscape::SNAPTARGET_PATH_INTERSECTION) : int(Inkscape::SNAPSOURCE_PATH_INTERSECTION); p.push_back(std::make_pair(p_ix * i2d, type)); } } } } } /* Local Variables: mode:c++ c-file-style:"stroustrup" c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) indent-tabs-mode:nil fill-column:99 End: */ // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :