nodepath.cpp revision 41e6b2681e6a61f7e0b79f06787ad76d397bf0bd
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define __SP_NODEPATH_C__
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/** \file
3e14f97f673e8a630f076077de35afdd43dc1587Roger A. Faulkner * Path handler in node edit mode
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * Authors:
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin * Lauris Kaplinski <lauris@kaplinski.com>
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * bulia byak <buliabyak@users.sf.net>
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * Portions of this code are in public domain; node sculpting functions written by bulia byak are under GNU GPL
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#ifdef HAVE_CONFIG_H
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin# include "config.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#endif
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include <gdk/gdkkeysyms.h>
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "display/canvas-bpath.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "display/curve.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "display/sp-ctrlline.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "display/sodipodi-ctrl.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "display/sp-canvas-util.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include <glibmm/i18n.h>
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "2geom/pathvector.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "2geom/sbasis-to-bezier.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "2geom/bezier-curve.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "2geom/hvlinesegment.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "helper/units.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "helper/geom.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "knot.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "inkscape.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "document.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "sp-namedview.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "desktop.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "desktop-handles.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "snap.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "message-stack.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "message-context.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "node-context.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "lpe-tool-context.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "shape-editor.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "selection-chemistry.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "selection.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "xml/repr.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "preferences.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "sp-metrics.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "sp-path.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "sp-text.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "sp-shape.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "libnr/nr-matrix-ops.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "svg/svg.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "verbs.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include <2geom/bezier-utils.h>
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include <vector>
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include <algorithm>
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include <cstring>
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include <cmath>
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "live_effects/lpeobject.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "live_effects/lpeobject-reference.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "live_effects/effect.h"
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include "live_effects/parameter/parameter.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "live_effects/parameter/path.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "util/mathfns.h"
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include "display/snap-indicator.h"
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#include "snapped-point.h"
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinnamespace Geom { class Matrix; }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/// \todo
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/// evil evil evil. FIXME: conflict of two different Path classes!
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/// There is a conflict in the namespace between two classes named Path.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/// #include "sp-flowtext.h"
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin/// #include "sp-flowregion.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
7c2fbfb345896881c631598ee3852ce9ce33fb07April Chin#define SP_TYPE_FLOWREGION (sp_flowregion_get_type ())
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define SP_IS_FLOWREGION(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SP_TYPE_FLOWREGION))
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinGType sp_flowregion_get_type (void);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define SP_TYPE_FLOWTEXT (sp_flowtext_get_type ())
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define SP_IS_FLOWTEXT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SP_TYPE_FLOWTEXT))
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinGType sp_flowtext_get_type (void);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin// end evil workaround
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#include "helper/stlport.h"
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/// \todo fixme: Implement these via preferences */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define NODE_FILL 0xbfbfbf00
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define NODE_STROKE 0x000000ff
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define NODE_FILL_HI 0xff000000
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define NODE_STROKE_HI 0x000000ff
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define NODE_FILL_SEL 0x0000ffff
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define NODE_STROKE_SEL 0x000000ff
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define NODE_FILL_SEL_HI 0xff000000
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define NODE_STROKE_SEL_HI 0x000000ff
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define KNOT_FILL 0xffffffff
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define KNOT_STROKE 0x000000ff
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define KNOT_FILL_HI 0xff000000
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin#define KNOT_STROKE_HI 0x000000ff
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic GMemChunk *nodechunk = NULL;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/* Creation from object */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void subpaths_from_pathvector(Inkscape::NodePath::Path *np, Geom::PathVector const & pathv, Inkscape::NodePath::NodeType const *t);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic Inkscape::NodePath::NodeType * parse_nodetypes(gchar const *types, guint length);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/* Object updating */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void stamp_repr(Inkscape::NodePath::Path *np);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic SPCurve *create_curve(Inkscape::NodePath::Path *np);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic gchar *create_typestr(Inkscape::NodePath::Path *np);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void sp_node_update_handles(Inkscape::NodePath::Node *node, bool fire_move_signals = true);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void sp_nodepath_node_select(Inkscape::NodePath::Node *node, gboolean incremental, gboolean override);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void sp_node_set_selected(Inkscape::NodePath::Node *node, gboolean selected);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic Inkscape::NodePath::Node *sp_nodepath_set_node_type(Inkscape::NodePath::Node *node, Inkscape::NodePath::NodeType type);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/* Adjust handle placement, if the node or the other handle is moved */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void sp_node_adjust_handle(Inkscape::NodePath::Node *node, gint which_adjust);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void sp_node_adjust_handles(Inkscape::NodePath::Node *node);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void sp_node_adjust_handles_auto(Inkscape::NodePath::Node *node);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/* Node event callbacks */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void node_clicked(SPKnot *knot, guint state, gpointer data);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void node_grabbed(SPKnot *knot, guint state, gpointer data);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void node_ungrabbed(SPKnot *knot, guint state, gpointer data);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic gboolean node_request(SPKnot *knot, Geom::Point const &p, guint state, gpointer data);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/* Handle event callbacks */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void node_handle_clicked(SPKnot *knot, guint state, gpointer data);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void node_handle_grabbed(SPKnot *knot, guint state, gpointer data);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void node_handle_ungrabbed(SPKnot *knot, guint state, gpointer data);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic gboolean node_handle_request(SPKnot *knot, Geom::Point &p, guint state, gpointer data);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void node_handle_moved(SPKnot *knot, Geom::Point const &p, guint state, gpointer data);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic gboolean node_handle_event(SPKnot *knot, GdkEvent *event, Inkscape::NodePath::Node *n);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/* Constructors and destructors */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic Inkscape::NodePath::SubPath *sp_nodepath_subpath_new(Inkscape::NodePath::Path *nodepath);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void sp_nodepath_subpath_destroy(Inkscape::NodePath::SubPath *subpath);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void sp_nodepath_subpath_close(Inkscape::NodePath::SubPath *sp);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void sp_nodepath_subpath_open(Inkscape::NodePath::SubPath *sp,Inkscape::NodePath::Node *n);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic Inkscape::NodePath::Node * sp_nodepath_node_new(Inkscape::NodePath::SubPath *sp,Inkscape::NodePath::Node *next,Inkscape::NodePath::NodeType type, NRPathcode code,
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin Geom::Point *ppos, Geom::Point *pos, Geom::Point *npos);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void sp_nodepath_node_destroy(Inkscape::NodePath::Node *node);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/* Helpers */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic Inkscape::NodePath::NodeSide *sp_node_get_side(Inkscape::NodePath::Node *node, gint which);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic Inkscape::NodePath::NodeSide *sp_node_opposite_side(Inkscape::NodePath::Node *node,Inkscape::NodePath::NodeSide *me);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic NRPathcode sp_node_path_code_from_side(Inkscape::NodePath::Node *node,Inkscape::NodePath::NodeSide *me);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic SPCurve* sp_nodepath_object_get_curve(SPObject *object, const gchar *key);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void sp_nodepath_set_curve (Inkscape::NodePath::Path *np, SPCurve *curve);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin// active_node indicates mouseover node
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinInkscape::NodePath::Node * Inkscape::NodePath::Path::active_node = NULL;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic SPCanvasItem *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinsp_nodepath_make_helper_item(Inkscape::NodePath::Path *np, /*SPDesktop *desktop, */const SPCurve *curve, bool show = false, guint32 color = 0xff0000ff) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SPCurve *helper_curve = curve->copy();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin helper_curve->transform(np->i2d);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SPCanvasItem *helper_path = sp_canvas_bpath_new(sp_desktop_controls(np->desktop), helper_curve);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(helper_path), color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(helper_path), 0, SP_WIND_RULE_NONZERO);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin sp_canvas_item_move_to_z(helper_path, 0);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (show) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin sp_canvas_item_show(helper_path);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin helper_curve->unref();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return helper_path;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin}
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinsp_nodepath_create_helperpaths(Inkscape::NodePath::Path *np) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin //std::map<Inkscape::LivePathEffect::Effect *, std::vector<SPCanvasItem *> > helper_path_vec;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (!SP_IS_LPE_ITEM(np->item)) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin g_print ("Only LPEItems can have helperpaths!\n");
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SPLPEItem *lpeitem = SP_LPE_ITEM(np->item);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin PathEffectList lpelist = sp_lpe_item_get_effect_list(lpeitem);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (PathEffectList::iterator i = lpelist.begin(); i != lpelist.end(); ++i) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin Inkscape::LivePathEffect::LPEObjectReference *lperef = (*i);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin Inkscape::LivePathEffect::Effect *lpe = lperef->lpeobject->get_lpe();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (lpe) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin // create new canvas items from the effect's helper paths
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin std::vector<Geom::PathVector> hpaths = lpe->getHelperPaths(lpeitem);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (std::vector<Geom::PathVector>::iterator j = hpaths.begin(); j != hpaths.end(); ++j) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SPCurve *helper_curve = new SPCurve(*j);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SPCanvasItem * canvasitem = sp_nodepath_make_helper_item(np, helper_curve, true, 0x509050dd);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->helper_path_vec[lpe].push_back(canvasitem);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin helper_curve->unref();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin}
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinstatic void
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinsp_nodepath_destroy_helperpaths(Inkscape::NodePath::Path *np) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (HelperPathList::iterator i = np->helper_path_vec.begin(); i != np->helper_path_vec.end(); ++i) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (std::vector<SPCanvasItem *>::iterator j = (*i).second.begin(); j != (*i).second.end(); ++j) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin GtkObject *temp = *j;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin *j = NULL;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin gtk_object_destroy(temp);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->helper_path_vec.clear();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin}
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/** updates canvas items from the effect's helper paths */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinvoid
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinsp_nodepath_update_helperpaths(Inkscape::NodePath::Path *np) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin //std::map<Inkscape::LivePathEffect::Effect *, std::vector<SPCanvasItem *> > helper_path_vec;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (!SP_IS_LPE_ITEM(np->item)) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin g_print ("Only LPEItems can have helperpaths!\n");
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SPLPEItem *lpeitem = SP_LPE_ITEM(np->item);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin PathEffectList lpelist = sp_lpe_item_get_effect_list(lpeitem);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /* The number or type or LPEs may have changed, so we need to clear and recreate our
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * helper_path_vec to make sure it is in sync */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin sp_nodepath_destroy_helperpaths(np);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin sp_nodepath_create_helperpaths(np);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (PathEffectList::iterator i = lpelist.begin(); i != lpelist.end(); ++i) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin Inkscape::LivePathEffect::Effect *lpe = (*i)->lpeobject->get_lpe();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (lpe) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin std::vector<Geom::PathVector> hpaths = lpe->getHelperPaths(lpeitem);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (unsigned int j = 0; j < hpaths.size(); ++j) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SPCurve *curve = new SPCurve(hpaths[j]);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin curve->transform(np->i2d);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH((np->helper_path_vec[lpe])[j]), curve);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin curve = curve->unref();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin}
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin/**
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * \brief Creates new nodepath from item
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * If repr_key_in is not NULL, object *has* to be a LivePathEffectObject !
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin *
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * \todo create proper constructor for nodepath::path, this method returns null a constructor cannot so this cannot be simply converted to constructor.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chinInkscape::NodePath::Path *sp_nodepath_new(SPDesktop *desktop, SPObject *object, bool show_handles, const char * repr_key_in, SPItem *item)
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin{
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (repr_key_in) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin g_assert(IS_LIVEPATHEFFECT(object));
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin Inkscape::XML::Node *repr = object->repr;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin /** \todo
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * FIXME: remove this. We don't want to edit paths inside flowtext.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * Instead we will build our flowtext with cloned paths, so that the
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin * real paths are outside the flowtext and thus editable as usual.
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin */
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (SP_IS_FLOWTEXT(object)) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin for (SPObject *child = sp_object_first_child(object) ; child != NULL; child = SP_OBJECT_NEXT(child) ) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if SP_IS_FLOWREGION(child) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SPObject *grandchild = sp_object_first_child(SP_OBJECT(child));
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (grandchild && SP_IS_PATH(grandchild)) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin object = SP_ITEM(grandchild);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin break;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin SPCurve *curve = sp_nodepath_object_get_curve(object, repr_key_in);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (curve == NULL) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return NULL;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (curve->get_segment_count() < 1) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin curve->unref();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return NULL; // prevent crash for one-node paths
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin //Create new nodepath
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin Inkscape::NodePath::Path *np = new Inkscape::NodePath::Path();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (!np) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin curve->unref();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin return NULL;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin Inkscape::Preferences *prefs = Inkscape::Preferences::get();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin // Set defaults
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->desktop = desktop;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->object = object;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->subpaths = NULL;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->selected = NULL;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->shape_editor = NULL; //Let the shapeeditor that makes this set it
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->local_change = 0;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->show_handles = show_handles;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->helper_path = NULL;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->helperpath_rgba = prefs->getInt("/tools/nodes/highlight_color", 0xff0000ff);
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->helperpath_width = 1.0;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->curve = curve->copy();
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->show_helperpath = prefs->getBool("/tools/nodes/show_helperpath");
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (SP_IS_LPE_ITEM(object)) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(object));
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin if (lpe && lpe->isVisible() && lpe->showOrigPath()) {
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin np->show_helperpath = true;
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968chin }
np->straight_path = false;
if (IS_LIVEPATHEFFECT(object) && item) {
np->item = item;
} else {
np->item = SP_ITEM(object);
}
np->drag_origin_mouse = Geom::Point(NR_HUGE, NR_HUGE);
// we need to update item's transform from the repr here,
// because they may be out of sync when we respond
// to a change in repr by regenerating nodepath --bb
sp_object_read_attr(SP_OBJECT(np->item), "transform");
np->i2d = sp_item_i2d_affine(np->item);
np->d2i = np->i2d.inverse();
np->repr = repr;
if (repr_key_in) { // apparently the object is an LPEObject
np->repr_key = g_strdup(repr_key_in);
np->repr_nodetypes_key = g_strconcat(np->repr_key, "-nodetypes", NULL);
Inkscape::LivePathEffect::Effect * lpe = LIVEPATHEFFECT(object)->get_lpe();
if (!lpe) {
g_error("sp_nodepath_new: lpeobject without real lpe passed as argument!");
delete np;
}
Inkscape::LivePathEffect::Parameter *lpeparam = lpe->getParameter(repr_key_in);
if (lpeparam) {
lpeparam->param_setup_nodepath(np);
}
} else {
np->repr_nodetypes_key = g_strdup("sodipodi:nodetypes");
if ( sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(np->object)) ) {
np->repr_key = g_strdup("inkscape:original-d");
Inkscape::LivePathEffect::Effect* lpe = sp_lpe_item_get_current_lpe(SP_LPE_ITEM(np->object));
if (lpe) {
lpe->setup_nodepath(np);
}
} else {
np->repr_key = g_strdup("d");
}
}
/* Calculate length of the nodetype string. The closing/starting point for closed paths is counted twice.
* So for example a closed rectangle has a nodetypestring of length 5.
* To get the correct count, one can count all segments in the paths, and then add the total number of (non-empty) paths. */
Geom::PathVector pathv_sanitized = pathv_to_linear_and_cubic_beziers(np->curve->get_pathvector());
np->curve->set_pathvector(pathv_sanitized);
guint length = np->curve->get_segment_count();
for (Geom::PathVector::const_iterator pit = pathv_sanitized.begin(); pit != pathv_sanitized.end(); ++pit) {
length += pit->empty() ? 0 : 1;
}
gchar const *nodetypes = np->repr->attribute(np->repr_nodetypes_key);
Inkscape::NodePath::NodeType *typestr = parse_nodetypes(nodetypes, length);
// create the subpath(s) from the bpath
subpaths_from_pathvector(np, pathv_sanitized, typestr);
// reverse the list, because sp_nodepath_subpath_new() used g_list_prepend instead of append (for speed)
np->subpaths = g_list_reverse(np->subpaths);
delete[] typestr;
curve->unref();
// Draw helper curve
if (np->show_helperpath) {
np->helper_path = sp_nodepath_make_helper_item(np, /*desktop, */np->curve, true, np->helperpath_rgba);
}
sp_nodepath_create_helperpaths(np);
return np;
}
/**
* Destroys nodepath's subpaths, then itself, also tell parent ShapeEditor about it.
*/
Inkscape::NodePath::Path::~Path() {
while (this->subpaths) {
sp_nodepath_subpath_destroy((Inkscape::NodePath::SubPath *) this->subpaths->data);
}
//Inform the ShapeEditor that made me, if any, that I am gone.
if (this->shape_editor)
this->shape_editor->nodepath_destroyed();
g_assert(!this->selected);
if (this->helper_path) {
GtkObject *temp = this->helper_path;
this->helper_path = NULL;
gtk_object_destroy(temp);
}
if (this->curve) {
this->curve->unref();
this->curve = NULL;
}
if (this->repr_key) {
g_free(this->repr_key);
this->repr_key = NULL;
}
if (this->repr_nodetypes_key) {
g_free(this->repr_nodetypes_key);
this->repr_nodetypes_key = NULL;
}
sp_nodepath_destroy_helperpaths(this);
this->desktop = NULL;
}
/**
* Return the node count of a given NodeSubPath.
*/
static gint sp_nodepath_subpath_get_node_count(Inkscape::NodePath::SubPath *subpath)
{
int nodeCount = 0;
if (subpath) {
nodeCount = g_list_length(subpath->nodes);
}
return nodeCount;
}
/**
* Return the node count of a given NodePath.
*/
static gint sp_nodepath_get_node_count(Inkscape::NodePath::Path *np)
{
gint nodeCount = 0;
if (np) {
for (GList *item = np->subpaths ; item ; item=item->next) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *)item->data;
nodeCount += g_list_length(subpath->nodes);
}
}
return nodeCount;
}
/**
* Return the subpath count of a given NodePath.
*/
static gint sp_nodepath_get_subpath_count(Inkscape::NodePath::Path *np)
{
gint nodeCount = 0;
if (np) {
nodeCount = g_list_length(np->subpaths);
}
return nodeCount;
}
/**
* Return the selected node count of a given NodePath.
*/
static gint sp_nodepath_selection_get_node_count(Inkscape::NodePath::Path *np)
{
gint nodeCount = 0;
if (np) {
nodeCount = g_list_length(np->selected);
}
return nodeCount;
}
/**
* Return the number of subpaths where nodes are selected in a given NodePath.
*/
static gint sp_nodepath_selection_get_subpath_count(Inkscape::NodePath::Path *np)
{
gint nodeCount = 0;
if (np && np->selected) {
if (!np->selected->next) {
nodeCount = 1;
} else {
for (GList *spl = np->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *subpath = static_cast<Inkscape::NodePath::SubPath *>(spl->data);
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *node = static_cast<Inkscape::NodePath::Node *>(nl->data);
if (node->selected) {
nodeCount++;
break;
}
}
}
}
}
return nodeCount;
}
/**
* Clean up a nodepath after editing.
*
* Currently we are deleting trivial subpaths.
*/
static void sp_nodepath_cleanup(Inkscape::NodePath::Path *nodepath)
{
GList *badSubPaths = NULL;
//Check all closed subpaths to be >=1 nodes, all open subpaths to be >= 2 nodes
for (GList *l = nodepath->subpaths; l ; l=l->next) {
Inkscape::NodePath::SubPath *sp = (Inkscape::NodePath::SubPath *)l->data;
if ((sp_nodepath_subpath_get_node_count(sp)<2 && !sp->closed) || (sp_nodepath_subpath_get_node_count(sp)<1 && sp->closed))
badSubPaths = g_list_append(badSubPaths, sp);
}
//Delete them. This second step is because sp_nodepath_subpath_destroy()
//also removes the subpath from nodepath->subpaths
for (GList *l = badSubPaths; l ; l=l->next) {
Inkscape::NodePath::SubPath *sp = (Inkscape::NodePath::SubPath *)l->data;
sp_nodepath_subpath_destroy(sp);
}
g_list_free(badSubPaths);
}
/**
* Create new nodepaths from pathvector, make it subpaths of np.
* \param t The node type array.
*/
static void subpaths_from_pathvector(Inkscape::NodePath::Path *np, Geom::PathVector const & pathv, Inkscape::NodePath::NodeType const *t)
{
guint i = 0; // index into node type array
for (Geom::PathVector::const_iterator pit = pathv.begin(); pit != pathv.end(); ++pit) {
if (pit->empty())
continue; // don't add single knot paths
Inkscape::NodePath::SubPath *sp = sp_nodepath_subpath_new(np);
Geom::Point ppos = pit->initialPoint() * np->i2d;
NRPathcode pcode = NR_MOVETO;
/* Johan: Note that this is pretty arcane code. I am pretty sure it is working correctly, be very certain to change it! (better to just rewrite this whole method)*/
for (Geom::Path::const_iterator cit = pit->begin(); cit != pit->end_closed(); ++cit) {
if( dynamic_cast<Geom::LineSegment const*>(&*cit) ||
dynamic_cast<Geom::HLineSegment const*>(&*cit) ||
dynamic_cast<Geom::VLineSegment const*>(&*cit) )
{
Geom::Point pos = cit->initialPoint() * (Geom::Matrix)np->i2d;
sp_nodepath_node_new(sp, NULL, t[i++], pcode, &ppos, &pos, &pos);
ppos = cit->finalPoint() * (Geom::Matrix)np->i2d;
pcode = NR_LINETO;
}
else if(Geom::CubicBezier const *cubic_bezier = dynamic_cast<Geom::CubicBezier const*>(&*cit)) {
std::vector<Geom::Point> points = cubic_bezier->points();
Geom::Point pos = points[0] * (Geom::Matrix)np->i2d;
Geom::Point npos = points[1] * (Geom::Matrix)np->i2d;
sp_nodepath_node_new(sp, NULL, t[i++], pcode, &ppos, &pos, &npos);
ppos = points[2] * (Geom::Matrix)np->i2d;
pcode = NR_CURVETO;
}
}
if (pit->closed()) {
// Add last knot (because sp_nodepath_subpath_close kills the last knot)
/* Remember that last closing segment is always a lineto, but its length can be zero if the path is visually closed already
* If the length is zero, don't add it to the nodepath. */
Geom::Curve const &closing_seg = pit->back_closed();
// Don't use !closing_seg.isDegenerate() as it is too precise, and does not account for floating point rounding probs (LP bug #257289)
if ( ! are_near(closing_seg.initialPoint(), closing_seg.finalPoint()) ) {
Geom::Point pos = closing_seg.finalPoint() * (Geom::Matrix)np->i2d;
sp_nodepath_node_new(sp, NULL, t[i++], NR_LINETO, &pos, &pos, &pos);
}
sp_nodepath_subpath_close(sp);
}
}
}
/**
* Convert from sodipodi:nodetypes to new style type array.
*/
static
Inkscape::NodePath::NodeType * parse_nodetypes(gchar const *types, guint length)
{
Inkscape::NodePath::NodeType *typestr = new Inkscape::NodePath::NodeType[length + 1];
guint pos = 0;
if (types) {
for (guint i = 0; types[i] && ( i < length ); i++) {
while ((types[i] > '\0') && (types[i] <= ' ')) i++;
if (types[i] != '\0') {
switch (types[i]) {
case 's':
typestr[pos++] =Inkscape::NodePath::NODE_SMOOTH;
break;
case 'a':
typestr[pos++] =Inkscape::NodePath::NODE_AUTO;
break;
case 'z':
typestr[pos++] =Inkscape::NodePath::NODE_SYMM;
break;
case 'c':
typestr[pos++] =Inkscape::NodePath::NODE_CUSP;
break;
default:
typestr[pos++] =Inkscape::NodePath::NODE_NONE;
break;
}
}
}
}
while (pos < length) {
typestr[pos++] = Inkscape::NodePath::NODE_NONE;
}
return typestr;
}
/**
* Make curve out of nodepath, write it into that nodepath's SPShape item so that display is
* updated but repr is not (for speed). Used during curve and node drag.
*/
static void update_object(Inkscape::NodePath::Path *np)
{
g_assert(np);
np->curve->unref();
np->curve = create_curve(np);
sp_nodepath_set_curve(np, np->curve);
if (np->show_helperpath) {
SPCurve * helper_curve = np->curve->copy();
helper_curve->transform(np->i2d);
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(np->helper_path), helper_curve);
helper_curve->unref();
}
// updating helperpaths of LPEItems is now done in sp_lpe_item_update();
//sp_nodepath_update_helperpaths(np);
// now that nodepath and knotholder can be enabled simultaneously, we must update the knotholder, too
// TODO: this should be done from ShapeEditor!! nodepath should be oblivious of knotholder!
np->shape_editor->update_knotholder();
}
/**
* Update XML path node with data from path object.
*/
static void update_repr_internal(Inkscape::NodePath::Path *np)
{
g_assert(np);
Inkscape::XML::Node *repr = np->object->repr;
np->curve->unref();
np->curve = create_curve(np);
gchar *typestr = create_typestr(np);
gchar *svgpath = sp_svg_write_path(np->curve->get_pathvector());
// determine if path has an effect applied and write to correct "d" attribute.
if (repr->attribute(np->repr_key) == NULL || strcmp(svgpath, repr->attribute(np->repr_key))) { // d changed
np->local_change++;
repr->setAttribute(np->repr_key, svgpath);
}
if (repr->attribute(np->repr_nodetypes_key) == NULL || strcmp(typestr, repr->attribute(np->repr_nodetypes_key))) { // nodetypes changed
np->local_change++;
repr->setAttribute(np->repr_nodetypes_key, typestr);
}
g_free(svgpath);
g_free(typestr);
if (np->show_helperpath) {
SPCurve * helper_curve = np->curve->copy();
helper_curve->transform(np->i2d);
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(np->helper_path), helper_curve);
helper_curve->unref();
}
// TODO: do we need this call here? after all, update_object() should have been called just before
//sp_nodepath_update_helperpaths(np);
}
/**
* Update XML path node with data from path object, commit changes forever.
*/
void sp_nodepath_update_repr(Inkscape::NodePath::Path *np, const gchar *annotation)
{
//fixme: np can be NULL, so check before proceeding
g_return_if_fail(np != NULL);
update_repr_internal(np);
sp_canvas_end_forced_full_redraws(np->desktop->canvas);
sp_document_done(sp_desktop_document(np->desktop), SP_VERB_CONTEXT_NODE,
annotation);
}
/**
* Update XML path node with data from path object, commit changes with undo.
*/
static void sp_nodepath_update_repr_keyed(Inkscape::NodePath::Path *np, gchar const *key, const gchar *annotation)
{
update_repr_internal(np);
sp_document_maybe_done(sp_desktop_document(np->desktop), key, SP_VERB_CONTEXT_NODE,
annotation);
}
/**
* Make duplicate of path, replace corresponding XML node in tree, commit.
*/
static void stamp_repr(Inkscape::NodePath::Path *np)
{
g_assert(np);
Inkscape::XML::Node *old_repr = np->object->repr;
Inkscape::XML::Node *new_repr = old_repr->duplicate(old_repr->document());
// remember the position of the item
gint pos = old_repr->position();
// remember parent
Inkscape::XML::Node *parent = sp_repr_parent(old_repr);
SPCurve *curve = create_curve(np);
gchar *typestr = create_typestr(np);
gchar *svgpath = sp_svg_write_path(curve->get_pathvector());
new_repr->setAttribute(np->repr_key, svgpath);
new_repr->setAttribute(np->repr_nodetypes_key, typestr);
// add the new repr to the parent
parent->appendChild(new_repr);
// move to the saved position
new_repr->setPosition(pos > 0 ? pos : 0);
sp_document_done(sp_desktop_document(np->desktop), SP_VERB_CONTEXT_NODE,
_("Stamp"));
Inkscape::GC::release(new_repr);
g_free(svgpath);
g_free(typestr);
curve->unref();
}
/**
* Create curve from path.
*/
static SPCurve *create_curve(Inkscape::NodePath::Path *np)
{
SPCurve *curve = new SPCurve();
for (GList *spl = np->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *sp = (Inkscape::NodePath::SubPath *) spl->data;
curve->moveto(sp->first->pos * np->d2i);
Inkscape::NodePath::Node *n = sp->first->n.other;
while (n) {
Geom::Point const end_pt = n->pos * np->d2i;
if (!IS_FINITE(n->pos[0]) || !IS_FINITE(n->pos[1])){
g_message("niet finite");
}
switch (n->code) {
case NR_LINETO:
curve->lineto(end_pt);
break;
case NR_CURVETO:
curve->curveto(n->p.other->n.pos * np->d2i,
n->p.pos * np->d2i,
end_pt);
break;
default:
g_assert_not_reached();
break;
}
if (n != sp->last) {
n = n->n.other;
} else {
n = NULL;
}
}
if (sp->closed) {
curve->closepath();
}
}
return curve;
}
/**
* Convert path type string to sodipodi:nodetypes style.
*/
static gchar *create_typestr(Inkscape::NodePath::Path *np)
{
gchar *typestr = g_new(gchar, 32);
gint len = 32;
gint pos = 0;
for (GList *spl = np->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *sp = (Inkscape::NodePath::SubPath *) spl->data;
if (pos >= len) {
typestr = g_renew(gchar, typestr, len + 32);
len += 32;
}
typestr[pos++] = 'c';
Inkscape::NodePath::Node *n;
n = sp->first->n.other;
while (n) {
gchar code;
switch (n->type) {
case Inkscape::NodePath::NODE_CUSP:
code = 'c';
break;
case Inkscape::NodePath::NODE_SMOOTH:
code = 's';
break;
case Inkscape::NodePath::NODE_AUTO:
code = 'a';
break;
case Inkscape::NodePath::NODE_SYMM:
code = 'z';
break;
default:
g_assert_not_reached();
code = '\0';
break;
}
if (pos >= len) {
typestr = g_renew(gchar, typestr, len + 32);
len += 32;
}
typestr[pos++] = code;
if (n != sp->last) {
n = n->n.other;
} else {
n = NULL;
}
}
}
if (pos >= len) {
typestr = g_renew(gchar, typestr, len + 1);
len += 1;
}
typestr[pos++] = '\0';
return typestr;
}
// Returns different message contexts depending on the current context. This function should only
// be called when ec is either a SPNodeContext or SPLPEToolContext, thus we return NULL in all
// other cases.
static Inkscape::MessageContext *
get_message_context(SPEventContext *ec)
{
Inkscape::MessageContext *mc = 0;
if (SP_IS_NODE_CONTEXT(ec)) {
mc = SP_NODE_CONTEXT(ec)->_node_message_context;
} else if (SP_IS_LPETOOL_CONTEXT(ec)) {
mc = SP_LPETOOL_CONTEXT(ec)->_lpetool_message_context;
} else {
g_warning ("Nodepath should only be present in Node tool or Geometric tool.");
}
return mc;
}
/**
\brief Fills node and handle positions for three nodes, splitting line
marked by end at distance t.
*/
static void sp_nodepath_line_midpoint(Inkscape::NodePath::Node *new_path,Inkscape::NodePath::Node *end, gdouble t)
{
g_assert(new_path != NULL);
g_assert(end != NULL);
g_assert(end->p.other == new_path);
Inkscape::NodePath::Node *start = new_path->p.other;
g_assert(start);
if (end->code == NR_LINETO) {
new_path->type =Inkscape::NodePath::NODE_CUSP;
new_path->code = NR_LINETO;
new_path->pos = new_path->n.pos = new_path->p.pos = (t * start->pos + (1 - t) * end->pos);
} else {
new_path->type =Inkscape::NodePath::NODE_SMOOTH;
new_path->code = NR_CURVETO;
gdouble s = 1 - t;
for (int dim = 0; dim < 2; dim++) {
Geom::Coord const f000 = start->pos[dim];
Geom::Coord const f001 = start->n.pos[dim];
Geom::Coord const f011 = end->p.pos[dim];
Geom::Coord const f111 = end->pos[dim];
Geom::Coord const f00t = s * f000 + t * f001;
Geom::Coord const f01t = s * f001 + t * f011;
Geom::Coord const f11t = s * f011 + t * f111;
Geom::Coord const f0tt = s * f00t + t * f01t;
Geom::Coord const f1tt = s * f01t + t * f11t;
Geom::Coord const fttt = s * f0tt + t * f1tt;
start->n.pos[dim] = f00t;
new_path->p.pos[dim] = f0tt;
new_path->pos[dim] = fttt;
new_path->n.pos[dim] = f1tt;
end->p.pos[dim] = f11t;
}
}
}
/**
* Adds new node on direct line between two nodes, activates handles of all
* three nodes.
*/
static Inkscape::NodePath::Node *sp_nodepath_line_add_node(Inkscape::NodePath::Node *end, gdouble t)
{
g_assert(end);
g_assert(end->subpath);
g_assert(g_list_find(end->subpath->nodes, end));
Inkscape::NodePath::Node *start = end->p.other;
g_assert( start->n.other == end );
Inkscape::NodePath::Node *newnode = sp_nodepath_node_new(end->subpath,
end,
(NRPathcode)end->code == NR_LINETO?
Inkscape::NodePath::NODE_CUSP : Inkscape::NodePath::NODE_SMOOTH,
(NRPathcode)end->code,
&start->pos, &start->pos, &start->n.pos);
sp_nodepath_line_midpoint(newnode, end, t);
sp_node_adjust_handles(start);
sp_node_update_handles(start);
sp_node_update_handles(newnode);
sp_node_adjust_handles(end);
sp_node_update_handles(end);
return newnode;
}
/**
\brief Break the path at the node: duplicate the argument node, start a new subpath with the duplicate, and copy all nodes after the argument node to it
*/
static Inkscape::NodePath::Node *sp_nodepath_node_break(Inkscape::NodePath::Node *node)
{
g_assert(node);
g_assert(node->subpath);
g_assert(g_list_find(node->subpath->nodes, node));
Inkscape::NodePath::Node* result = 0;
Inkscape::NodePath::SubPath *sp = node->subpath;
Inkscape::NodePath::Path *np = sp->nodepath;
if (sp->closed) {
sp_nodepath_subpath_open(sp, node);
result = sp->first;
} else if ( (node == sp->first) || (node == sp->last ) ){
// no break for end nodes
result = 0;
} else {
// create a new subpath
Inkscape::NodePath::SubPath *newsubpath = sp_nodepath_subpath_new(np);
// duplicate the break node as start of the new subpath
Inkscape::NodePath::Node *newnode = sp_nodepath_node_new(newsubpath, NULL,
static_cast<Inkscape::NodePath::NodeType>(node->type),
NR_MOVETO, &node->pos, &node->pos, &node->n.pos);
// attach rest of curve to new node
g_assert(node->n.other);
newnode->n.other = node->n.other; node->n.other = NULL;
newnode->n.other->p.other = newnode;
newsubpath->last = sp->last;
sp->last = node;
node = newnode;
while (node->n.other) {
node = node->n.other;
node->subpath = newsubpath;
sp->nodes = g_list_remove(sp->nodes, node);
newsubpath->nodes = g_list_prepend(newsubpath->nodes, node);
}
result = newnode;
}
return result;
}
/**
* Duplicate node and connect to neighbours.
*/
static Inkscape::NodePath::Node *sp_nodepath_node_duplicate(Inkscape::NodePath::Node *node)
{
g_assert(node);
g_assert(node->subpath);
g_assert(g_list_find(node->subpath->nodes, node));
Inkscape::NodePath::SubPath *sp = node->subpath;
NRPathcode code = (NRPathcode) node->code;
if (code == NR_MOVETO) { // if node is the endnode,
node->code = NR_LINETO; // new one is inserted before it, so change that to line
}
Inkscape::NodePath::Node *newnode = sp_nodepath_node_new(sp, node, (Inkscape::NodePath::NodeType)node->type, code, &node->p.pos, &node->pos, &node->n.pos);
if (!node->n.other || !node->p.other) { // if node is an endnode, select it
return node;
} else {
return newnode; // otherwise select the newly created node
}
}
static void sp_node_handle_mirror_n_to_p(Inkscape::NodePath::Node *node)
{
node->p.pos = (node->pos + (node->pos - node->n.pos));
}
static void sp_node_handle_mirror_p_to_n(Inkscape::NodePath::Node *node)
{
node->n.pos = (node->pos + (node->pos - node->p.pos));
}
/**
* Change line type at node, with side effects on neighbours.
*/
static void sp_nodepath_set_line_type(Inkscape::NodePath::Node *end, NRPathcode code)
{
g_assert(end);
g_assert(end->subpath);
g_assert(end->p.other);
if (end->code != static_cast<guint>(code) ) {
Inkscape::NodePath::Node *start = end->p.other;
end->code = code;
if (code == NR_LINETO) {
if (start->code == NR_LINETO) {
sp_nodepath_set_node_type(start, Inkscape::NodePath::NODE_CUSP);
}
if (end->n.other) {
if (end->n.other->code == NR_LINETO) {
sp_nodepath_set_node_type(end, Inkscape::NodePath::NODE_CUSP);
}
}
if (start->type == Inkscape::NodePath::NODE_AUTO)
start->type = Inkscape::NodePath::NODE_SMOOTH;
if (end->type == Inkscape::NodePath::NODE_AUTO)
end->type = Inkscape::NodePath::NODE_SMOOTH;
start->n.pos = start->pos;
end->p.pos = end->pos;
sp_node_adjust_handle(start, -1);
sp_node_adjust_handle(end, 1);
} else {
Geom::Point delta = end->pos - start->pos;
start->n.pos = start->pos + delta / 3;
end->p.pos = end->pos - delta / 3;
sp_node_adjust_handle(start, 1);
sp_node_adjust_handle(end, -1);
}
sp_node_update_handles(start);
sp_node_update_handles(end);
}
}
static void
sp_nodepath_update_node_knot(Inkscape::NodePath::Node *node)
{
if (node->type == Inkscape::NodePath::NODE_CUSP) {
node->knot->setShape (SP_KNOT_SHAPE_DIAMOND);
node->knot->setSize (node->selected? 11 : 9);
sp_knot_update_ctrl(node->knot);
} else if (node->type == Inkscape::NodePath::NODE_AUTO) {
node->knot->setShape (SP_KNOT_SHAPE_CIRCLE);
node->knot->setSize (node->selected? 11 : 9);
sp_knot_update_ctrl(node->knot);
} else {
node->knot->setShape (SP_KNOT_SHAPE_SQUARE);
node->knot->setSize (node->selected? 9 : 7);
sp_knot_update_ctrl(node->knot);
}
}
/**
* Change node type, and its handles accordingly.
*/
static Inkscape::NodePath::Node *sp_nodepath_set_node_type(Inkscape::NodePath::Node *node, Inkscape::NodePath::NodeType type)
{
g_assert(node);
g_assert(node->subpath);
if ((node->p.other != NULL) && (node->n.other != NULL)) {
if ((node->code == NR_LINETO) && (node->n.other->code == NR_LINETO)) {
type =Inkscape::NodePath::NODE_CUSP;
}
}
node->type = type;
sp_nodepath_update_node_knot(node);
// if one of handles is mouseovered, preserve its position
if (node->p.knot && SP_KNOT_IS_MOUSEOVER(node->p.knot)) {
sp_node_adjust_handle(node, 1);
} else if (node->n.knot && SP_KNOT_IS_MOUSEOVER(node->n.knot)) {
sp_node_adjust_handle(node, -1);
} else {
sp_node_adjust_handles(node);
}
sp_node_update_handles(node);
sp_nodepath_update_statusbar(node->subpath->nodepath);
return node;
}
bool
sp_node_side_is_line (Inkscape::NodePath::Node *node, Inkscape::NodePath::NodeSide *side)
{
// TODO clean up multiple returns
Inkscape::NodePath::Node *othernode = side->other;
if (!othernode)
return false;
NRPathcode const code = sp_node_path_code_from_side(node, side);
if (code == NR_LINETO)
return true;
Inkscape::NodePath::NodeSide *other_to_me = NULL;
if (&node->p == side) {
other_to_me = &othernode->n;
} else if (&node->n == side) {
other_to_me = &othernode->p;
}
if (!other_to_me)
return false;
bool is_line =
(Geom::L2(othernode->pos - other_to_me->pos) < 1e-6 &&
Geom::L2(node->pos - side->pos) < 1e-6);
return is_line;
}
/**
* Same as sp_nodepath_set_node_type(), but also converts, if necessary, adjacent segments from
* lines to curves. If adjacent to one line segment, pulls out or rotates opposite handle to align
* with that segment, procucing half-smooth node. If already half-smooth, pull out the second handle too.
* If already cusp and set to cusp, retracts handles.
*/
void sp_nodepath_convert_node_type(Inkscape::NodePath::Node *node, Inkscape::NodePath::NodeType type)
{
if (type == Inkscape::NodePath::NODE_AUTO) {
if (node->p.other != NULL)
node->code = NR_CURVETO;
if (node->n.other != NULL)
node->n.other->code = NR_CURVETO;
}
if (type == Inkscape::NodePath::NODE_SYMM || type == Inkscape::NodePath::NODE_SMOOTH) {
/*
Here's the algorithm of converting node to smooth (Shift+S or toolbar button), in pseudocode:
if (two_handles) {
// do nothing, adjust_handles called via set_node_type will line them up
} else if (one_handle) {
if (opposite_to_handle_is_line) {
if (lined_up) {
// already half-smooth; pull opposite handle too making it fully smooth
} else {
// do nothing, adjust_handles will line the handle up, producing a half-smooth node
}
} else {
// pull opposite handle in line with the existing one
}
} else if (no_handles) {
if (both_segments_are_lines
OR both_segments_are_curves
OR one_is_line_but_the_curveside_node_is_selected_and_has_two_handles) {
//pull both handles
} else {
// pull the handle opposite to line segment, making node half-smooth
}
}
*/
bool p_has_handle = (Geom::L2(node->pos - node->p.pos) > 1e-6);
bool n_has_handle = (Geom::L2(node->pos - node->n.pos) > 1e-6);
bool p_is_line = sp_node_side_is_line(node, &node->p);
bool n_is_line = sp_node_side_is_line(node, &node->n);
#define NODE_HAS_BOTH_HANDLES(node) ((Geom::L2(node->pos - node->n.pos) > 1e-6) && (Geom::L2(node->pos - node->p.pos) > 1e-6))
if (p_has_handle && n_has_handle) {
// do nothing, adjust_handles will line them up
} else if (p_has_handle || n_has_handle) {
if (p_has_handle && n_is_line) {
Radial line (node->n.other->pos - node->pos);
Radial handle (node->pos - node->p.pos);
if (fabs(line.a - handle.a) < 1e-3) { // lined up
// already half-smooth; pull opposite handle too making it fully smooth
node->n.other->code = NR_CURVETO;
node->n.pos = node->pos + (node->n.other->pos - node->pos) / 3;
} else {
// do nothing, adjust_handles will line the handle up, producing a half-smooth node
}
} else if (n_has_handle && p_is_line) {
Radial line (node->p.other->pos - node->pos);
Radial handle (node->pos - node->n.pos);
if (fabs(line.a - handle.a) < 1e-3) { // lined up
// already half-smooth; pull opposite handle too making it fully smooth
node->code = NR_CURVETO;
node->p.pos = node->pos + (node->p.other->pos - node->pos) / 3;
} else {
// do nothing, adjust_handles will line the handle up, producing a half-smooth node
}
} else if (p_has_handle && node->n.other) {
// pull n handle
node->n.other->code = NR_CURVETO;
double len = (type == Inkscape::NodePath::NODE_SYMM)?
Geom::L2(node->p.pos - node->pos) :
Geom::L2(node->n.other->pos - node->pos) / 3;
node->n.pos = node->pos - (len / Geom::L2(node->p.pos - node->pos)) * (node->p.pos - node->pos);
} else if (n_has_handle && node->p.other) {
// pull p handle
node->code = NR_CURVETO;
double len = (type == Inkscape::NodePath::NODE_SYMM)?
Geom::L2(node->n.pos - node->pos) :
Geom::L2(node->p.other->pos - node->pos) / 3;
node->p.pos = node->pos - (len / Geom::L2(node->n.pos - node->pos)) * (node->n.pos - node->pos);
}
} else if (!p_has_handle && !n_has_handle) {
if ((p_is_line && n_is_line) || (!p_is_line && node->p.other && !n_is_line && node->n.other) ||
(n_is_line && node->p.other && node->p.other->selected && NODE_HAS_BOTH_HANDLES(node->p.other)) ||
(p_is_line && node->n.other && node->n.other->selected && NODE_HAS_BOTH_HANDLES(node->n.other))
) {
// no handles, but: both segments are either lines or curves; or: one is line and the
// node at the other side is selected (so it was just smoothed too!) and now has both
// handles: then pull both handles here
// convert both to curves:
node->code = NR_CURVETO;
node->n.other->code = NR_CURVETO;
sp_node_adjust_handles_auto(node);
} else {
// pull the handle opposite to line segment, making it half-smooth
if (p_is_line && node->n.other) {
if (type != Inkscape::NodePath::NODE_SYMM) {
// pull n handle
node->n.other->code = NR_CURVETO;
double len = Geom::L2(node->n.other->pos - node->pos) / 3;
node->n.pos = node->pos + (len / Geom::L2(node->p.other->pos - node->pos)) * (node->p.other->pos - node->pos);
}
} else if (n_is_line && node->p.other) {
if (type != Inkscape::NodePath::NODE_SYMM) {
// pull p handle
node->code = NR_CURVETO;
double len = Geom::L2(node->p.other->pos - node->pos) / 3;
node->p.pos = node->pos + (len / Geom::L2(node->n.other->pos - node->pos)) * (node->n.other->pos - node->pos);
}
}
}
}
} else if (type == Inkscape::NodePath::NODE_CUSP && node->type == Inkscape::NodePath::NODE_CUSP) {
// cusping a cusp: retract nodes
node->p.pos = node->pos;
node->n.pos = node->pos;
}
sp_nodepath_set_node_type (node, type);
}
/**
* Move node to point, and adjust its and neighbouring handles.
*/
void sp_node_moveto(Inkscape::NodePath::Node *node, Geom::Point p)
{
if (node->type == Inkscape::NodePath::NODE_AUTO) {
node->pos = p;
sp_node_adjust_handles_auto(node);
} else {
Geom::Point delta = p - node->pos;
node->pos = p;
node->p.pos += delta;
node->n.pos += delta;
}
Inkscape::NodePath::Node *node_p = NULL;
Inkscape::NodePath::Node *node_n = NULL;
if (node->p.other) {
if (sp_node_side_is_line(node, &node->p)) {
sp_node_adjust_handle(node, 1);
sp_node_adjust_handle(node->p.other, -1);
node_p = node->p.other;
}
if (!node->p.other->selected && node->p.other->type == Inkscape::NodePath::NODE_AUTO) {
sp_node_adjust_handles_auto(node->p.other);
node_p = node->p.other;
}
}
if (node->n.other) {
if (sp_node_side_is_line(node, &node->n)) {
sp_node_adjust_handle(node, -1);
sp_node_adjust_handle(node->n.other, 1);
node_n = node->n.other;
}
if (!node->n.other->selected && node->n.other->type == Inkscape::NodePath::NODE_AUTO) {
sp_node_adjust_handles_auto(node->n.other);
node_n = node->n.other;
}
}
// this function is only called from batch movers that will update display at the end
// themselves, so here we just move all the knots without emitting move signals, for speed
sp_node_update_handles(node, false);
if (node_n) {
sp_node_update_handles(node_n, false);
}
if (node_p) {
sp_node_update_handles(node_p, false);
}
}
/**
* Call sp_node_moveto() for node selection and handle possible snapping.
*/
static void sp_nodepath_selected_nodes_move(Inkscape::NodePath::Path *nodepath, Geom::Coord dx, Geom::Coord dy,
bool const snap, bool constrained = false,
Inkscape::Snapper::ConstraintLine const &constraint = Geom::Point())
{
Geom::Point delta(dx, dy);
Geom::Point best_pt = delta;
Inkscape::SnappedPoint best;
if (snap) {
/* When dragging a (selected) node, it should only snap to other nodes (i.e. unselected nodes), and
* not to itself. The snapper however can not tell which nodes are selected and which are not, so we
* must provide that information. */
// Build a list of the unselected nodes to which the snapper should snap
std::vector<std::pair<Geom::Point, int> > unselected_nodes;
for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
if (!node->selected) {
unselected_nodes.push_back(std::make_pair(to_2geom(node->pos), node->type == Inkscape::NodePath::NODE_SMOOTH ? Inkscape::SNAPTARGET_NODE_SMOOTH : Inkscape::SNAPTARGET_NODE_CUSP));
}
}
}
SnapManager &m = nodepath->desktop->namedview->snap_manager;
// When only the node closest to the mouse pointer is to be snapped
// then we will not even try to snap to other points and discard those immediately
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
bool closest_only = prefs->getBool("/options/snapclosestonly/value", false);
Inkscape::NodePath::Node *closest_node = NULL;
Geom::Coord closest_dist = NR_HUGE;
if (closest_only) {
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
Geom::Coord dist = Geom::L2(nodepath->drag_origin_mouse - n->origin);
if (dist < closest_dist) {
closest_node = n;
closest_dist = dist;
}
}
}
// Iterate through all selected nodes
m.setup(nodepath->desktop, false, nodepath->item, &unselected_nodes);
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
if (!closest_only || n == closest_node) { //try to snap either all selected nodes or only the closest one
Inkscape::SnappedPoint s;
Inkscape::SnapSourceType source_type = (n->type == Inkscape::NodePath::NODE_SMOOTH ? Inkscape::SNAPSOURCE_NODE_SMOOTH : Inkscape::SNAPSOURCE_NODE_CUSP);
if (constrained) {
Inkscape::Snapper::ConstraintLine dedicated_constraint = constraint;
dedicated_constraint.setPoint(n->pos);
s = m.constrainedSnap(Inkscape::SnapPreferences::SNAPPOINT_NODE, to_2geom(n->pos + delta), source_type, dedicated_constraint, false);
} else {
s = m.freeSnap(Inkscape::SnapPreferences::SNAPPOINT_NODE, to_2geom(n->pos + delta), source_type);
}
if (s.getSnapped()) {
s.setPointerDistance(Geom::L2(nodepath->drag_origin_mouse - n->origin));
if (!s.isOtherSnapBetter(best, true)) {
best = s;
best_pt = from_2geom(s.getPoint()) - n->pos;
}
}
}
}
if (best.getSnapped()) {
nodepath->desktop->snapindicator->set_new_snaptarget(best);
} else {
nodepath->desktop->snapindicator->remove_snaptarget();
}
}
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
sp_node_moveto(n, n->pos + best_pt);
}
// do not update repr here so that node dragging is acceptably fast
update_object(nodepath);
}
/**
Function mapping x (in the range 0..1) to y (in the range 1..0) using a smooth half-bell-like
curve; the parameter alpha determines how blunt (alpha > 1) or sharp (alpha < 1) will be the curve
near x = 0.
*/
double
sculpt_profile (double x, double alpha, guint profile)
{
double result = 1;
if (x >= 1) {
result = 0;
} else if (x <= 0) {
result = 1;
} else {
switch (profile) {
case SCULPT_PROFILE_LINEAR:
result = 1 - x;
break;
case SCULPT_PROFILE_BELL:
result = (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5);
break;
case SCULPT_PROFILE_ELLIPTIC:
result = sqrt(1 - x*x);
break;
default:
g_assert_not_reached();
}
}
return result;
}
double
bezier_length (Geom::Point a, Geom::Point ah, Geom::Point bh, Geom::Point b)
{
// extremely primitive for now, don't have time to look for the real one
double lower = Geom::L2(b - a);
double upper = Geom::L2(ah - a) + Geom::L2(bh - ah) + Geom::L2(bh - b);
return (lower + upper)/2;
}
void
sp_nodepath_move_node_and_handles (Inkscape::NodePath::Node *n, Geom::Point delta, Geom::Point delta_n, Geom::Point delta_p)
{
n->pos = n->origin + delta;
n->n.pos = n->n.origin + delta_n;
n->p.pos = n->p.origin + delta_p;
sp_node_adjust_handles(n);
sp_node_update_handles(n, false);
}
/**
* Displace selected nodes and their handles by fractions of delta (from their origins), depending
* on how far they are from the dragged node n.
*/
static void
sp_nodepath_selected_nodes_sculpt(Inkscape::NodePath::Path *nodepath, Inkscape::NodePath::Node *n, Geom::Point delta)
{
g_assert (n);
g_assert (nodepath);
g_assert (n->subpath->nodepath == nodepath);
double pressure = n->knot->pressure;
if (pressure == 0)
pressure = 0.5; // default
pressure = CLAMP (pressure, 0.2, 0.8);
// map pressure to alpha = 1/5 ... 5
double alpha = 1 - 2 * fabs(pressure - 0.5);
if (pressure > 0.5)
alpha = 1/alpha;
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
guint profile = prefs->getInt("/tools/nodes/sculpting_profile", SCULPT_PROFILE_BELL);
if (sp_nodepath_selection_get_subpath_count(nodepath) <= 1) {
// Only one subpath has selected nodes:
// use linear mode, where the distance from n to node being dragged is calculated along the path
double n_sel_range = 0, p_sel_range = 0;
guint n_nodes = 0, p_nodes = 0;
guint n_sel_nodes = 0, p_sel_nodes = 0;
// First pass: calculate ranges (TODO: we could cache them, as they don't change while dragging)
{
double n_range = 0, p_range = 0;
bool n_going = true, p_going = true;
Inkscape::NodePath::Node *n_node = n;
Inkscape::NodePath::Node *p_node = n;
do {
// Do one step in both directions from n, until reaching the end of subpath or bumping into each other
if (n_node && n_going)
n_node = n_node->n.other;
if (n_node == NULL) {
n_going = false;
} else {
n_nodes ++;
n_range += bezier_length (n_node->p.other->origin, n_node->p.other->n.origin, n_node->p.origin, n_node->origin);
if (n_node->selected) {
n_sel_nodes ++;
n_sel_range = n_range;
}
if (n_node == p_node) {
n_going = false;
p_going = false;
}
}
if (p_node && p_going)
p_node = p_node->p.other;
if (p_node == NULL) {
p_going = false;
} else {
p_nodes ++;
p_range += bezier_length (p_node->n.other->origin, p_node->n.other->p.origin, p_node->n.origin, p_node->origin);
if (p_node->selected) {
p_sel_nodes ++;
p_sel_range = p_range;
}
if (p_node == n_node) {
n_going = false;
p_going = false;
}
}
} while (n_going || p_going);
}
// Second pass: actually move nodes in this subpath
sp_nodepath_move_node_and_handles (n, delta, delta, delta);
{
double n_range = 0, p_range = 0;
bool n_going = true, p_going = true;
Inkscape::NodePath::Node *n_node = n;
Inkscape::NodePath::Node *p_node = n;
do {
// Do one step in both directions from n, until reaching the end of subpath or bumping into each other
if (n_node && n_going)
n_node = n_node->n.other;
if (n_node == NULL) {
n_going = false;
} else {
n_range += bezier_length (n_node->p.other->origin, n_node->p.other->n.origin, n_node->p.origin, n_node->origin);
if (n_node->selected) {
sp_nodepath_move_node_and_handles (n_node,
sculpt_profile (n_range / n_sel_range, alpha, profile) * delta,
sculpt_profile ((n_range + Geom::L2(n_node->n.origin - n_node->origin)) / n_sel_range, alpha, profile) * delta,
sculpt_profile ((n_range - Geom::L2(n_node->p.origin - n_node->origin)) / n_sel_range, alpha, profile) * delta);
}
if (n_node == p_node) {
n_going = false;
p_going = false;
}
}
if (p_node && p_going)
p_node = p_node->p.other;
if (p_node == NULL) {
p_going = false;
} else {
p_range += bezier_length (p_node->n.other->origin, p_node->n.other->p.origin, p_node->n.origin, p_node->origin);
if (p_node->selected) {
sp_nodepath_move_node_and_handles (p_node,
sculpt_profile (p_range / p_sel_range, alpha, profile) * delta,
sculpt_profile ((p_range - Geom::L2(p_node->n.origin - p_node->origin)) / p_sel_range, alpha, profile) * delta,
sculpt_profile ((p_range + Geom::L2(p_node->p.origin - p_node->origin)) / p_sel_range, alpha, profile) * delta);
}
if (p_node == n_node) {
n_going = false;
p_going = false;
}
}
} while (n_going || p_going);
}
} else {
// Multiple subpaths have selected nodes:
// use spatial mode, where the distance from n to node being dragged is measured directly as Geom::L2.
// TODO: correct these distances taking into account their angle relative to the bisector, so as to
// fix the pear-like shape when sculpting e.g. a ring
// First pass: calculate range
gdouble direct_range = 0;
for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
if (node->selected) {
direct_range = MAX(direct_range, Geom::L2(node->origin - n->origin));
}
}
}
// Second pass: actually move nodes
for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
if (node->selected) {
if (direct_range > 1e-6) {
sp_nodepath_move_node_and_handles (node,
sculpt_profile (Geom::L2(node->origin - n->origin) / direct_range, alpha, profile) * delta,
sculpt_profile (Geom::L2(node->n.origin - n->origin) / direct_range, alpha, profile) * delta,
sculpt_profile (Geom::L2(node->p.origin - n->origin) / direct_range, alpha, profile) * delta);
} else {
sp_nodepath_move_node_and_handles (node, delta, delta, delta);
}
}
}
}
}
// do not update repr here so that node dragging is acceptably fast
update_object(nodepath);
}
/**
* Move node selection to point, adjust its and neighbouring handles,
* handle possible snapping, and commit the change with possible undo.
*/
void
sp_node_selected_move(Inkscape::NodePath::Path *nodepath, gdouble dx, gdouble dy)
{
if (!nodepath) return;
sp_nodepath_selected_nodes_move(nodepath, dx, dy, false);
if (dx == 0) {
sp_nodepath_update_repr_keyed(nodepath, "node:move:vertical", _("Move nodes vertically"));
} else if (dy == 0) {
sp_nodepath_update_repr_keyed(nodepath, "node:move:horizontal", _("Move nodes horizontally"));
} else {
sp_nodepath_update_repr(nodepath, _("Move nodes"));
}
}
/**
* Move node selection off screen and commit the change.
*/
void
sp_node_selected_move_screen(SPDesktop *desktop, Inkscape::NodePath::Path *nodepath, gdouble dx, gdouble dy)
{
// borrowed from sp_selection_move_screen in selection-chemistry.c
// we find out the current zoom factor and divide deltas by it
gdouble zoom = desktop->current_zoom();
gdouble zdx = dx / zoom;
gdouble zdy = dy / zoom;
if (!nodepath) return;
sp_nodepath_selected_nodes_move(nodepath, zdx, zdy, false);
if (dx == 0) {
sp_nodepath_update_repr_keyed(nodepath, "node:move:vertical", _("Move nodes vertically"));
} else if (dy == 0) {
sp_nodepath_update_repr_keyed(nodepath, "node:move:horizontal", _("Move nodes horizontally"));
} else {
sp_nodepath_update_repr(nodepath, _("Move nodes"));
}
}
/**
* Move selected nodes to the absolute position given
*/
void sp_node_selected_move_absolute(Inkscape::NodePath::Path *nodepath, Geom::Coord val, Geom::Dim2 axis)
{
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
Geom::Point npos(axis == Geom::X ? val : n->pos[Geom::X], axis == Geom::Y ? val : n->pos[Geom::Y]);
sp_node_moveto(n, npos);
}
sp_nodepath_update_repr(nodepath, _("Move nodes"));
}
/**
* If the coordinates of all selected nodes coincide, return the common coordinate; otherwise return Geom::Nothing
*/
boost::optional<Geom::Coord> sp_node_selected_common_coord (Inkscape::NodePath::Path *nodepath, Geom::Dim2 axis)
{
boost::optional<Geom::Coord> no_coord;
g_return_val_if_fail(nodepath->selected, no_coord);
// determine coordinate of first selected node
GList *nsel = nodepath->selected;
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) nsel->data;
Geom::Coord coord = n->pos[axis];
bool coincide = true;
// compare it to the coordinates of all the other selected nodes
for (GList *l = nsel->next; l != NULL; l = l->next) {
n = (Inkscape::NodePath::Node *) l->data;
if (n->pos[axis] != coord) {
coincide = false;
}
}
if (coincide) {
return coord;
} else {
Geom::Rect bbox = sp_node_selected_bbox(nodepath);
// currently we return the coordinate of the bounding box midpoint because I don't know how
// to erase the spin button entry field :), but maybe this can be useful behaviour anyway
return bbox.midpoint()[axis];
}
}
/** If they don't yet exist, creates knot and line for the given side of the node */
static void sp_node_ensure_knot_exists (SPDesktop *desktop, Inkscape::NodePath::Node *node, Inkscape::NodePath::NodeSide *side)
{
if (!side->knot) {
side->knot = sp_knot_new(desktop, _("<b>Node handle</b>: drag to shape the curve; with <b>Ctrl</b> to snap angle; with <b>Alt</b> to lock length; with <b>Shift</b> to rotate both handles"));
side->knot->setShape (SP_KNOT_SHAPE_CIRCLE);
side->knot->setSize (7);
side->knot->setAnchor (GTK_ANCHOR_CENTER);
side->knot->setFill(KNOT_FILL, KNOT_FILL_HI, KNOT_FILL_HI);
side->knot->setStroke(KNOT_STROKE, KNOT_STROKE_HI, KNOT_STROKE_HI);
sp_knot_update_ctrl(side->knot);
g_signal_connect(G_OBJECT(side->knot), "clicked", G_CALLBACK(node_handle_clicked), node);
g_signal_connect(G_OBJECT(side->knot), "grabbed", G_CALLBACK(node_handle_grabbed), node);
g_signal_connect(G_OBJECT(side->knot), "ungrabbed", G_CALLBACK(node_handle_ungrabbed), node);
g_signal_connect(G_OBJECT(side->knot), "request", G_CALLBACK(node_handle_request), node);
g_signal_connect(G_OBJECT(side->knot), "moved", G_CALLBACK(node_handle_moved), node);
g_signal_connect(G_OBJECT(side->knot), "event", G_CALLBACK(node_handle_event), node);
}
if (!side->line) {
side->line = sp_canvas_item_new(sp_desktop_controls(desktop),
SP_TYPE_CTRLLINE, NULL);
}
}
/**
* Ensure the given handle of the node is visible/invisible, update its screen position
*/
static void sp_node_update_handle(Inkscape::NodePath::Node *node, gint which, gboolean show_handle, bool fire_move_signals)
{
g_assert(node != NULL);
Inkscape::NodePath::NodeSide *side = sp_node_get_side(node, which);
NRPathcode code = sp_node_path_code_from_side(node, side);
show_handle = show_handle && (code == NR_CURVETO) && (Geom::L2(side->pos - node->pos) > 1e-6);
if (show_handle) {
if (!side->knot) { // No handle knot at all
sp_node_ensure_knot_exists(node->subpath->nodepath->desktop, node, side);
// Just created, so we shouldn't fire the node_moved callback - instead set the knot position directly
side->knot->pos = side->pos;
if (side->knot->item)
SP_CTRL(side->knot->item)->moveto(side->pos);
sp_ctrlline_set_coords(SP_CTRLLINE(side->line), node->pos, side->pos);
sp_knot_show(side->knot);
} else {
if (side->knot->pos != to_2geom(side->pos)) { // only if it's really moved
if (fire_move_signals) {
sp_knot_set_position(side->knot, side->pos, 0); // this will set coords of the line as well
} else {
sp_knot_moveto(side->knot, side->pos);
sp_ctrlline_set_coords(SP_CTRLLINE(side->line), node->pos, side->pos);
}
}
if (!SP_KNOT_IS_VISIBLE(side->knot)) {
sp_knot_show(side->knot);
}
}
sp_canvas_item_show(side->line);
} else {
if (side->knot) {
if (SP_KNOT_IS_VISIBLE(side->knot)) {
sp_knot_hide(side->knot);
}
}
if (side->line) {
sp_canvas_item_hide(side->line);
}
}
}
/**
* Ensure the node itself is visible, its handles and those of the neighbours of the node are
* visible if selected, update their screen positions. If fire_move_signals, move the node and its
* handles so that the corresponding signals are fired, callbacks are activated, and curve is
* updated; otherwise, just move the knots silently (used in batch moves).
*/
static void sp_node_update_handles(Inkscape::NodePath::Node *node, bool fire_move_signals)
{
g_assert(node != NULL);
if (!SP_KNOT_IS_VISIBLE(node->knot)) {
sp_knot_show(node->knot);
}
if (node->knot->pos != to_2geom(node->pos)) { // visible knot is in a different position, need to update
if (fire_move_signals)
sp_knot_set_position(node->knot, node->pos, 0);
else
sp_knot_moveto(node->knot, node->pos);
}
gboolean show_handles = node->selected;
if (node->p.other != NULL) {
if (node->p.other->selected) show_handles = TRUE;
}
if (node->n.other != NULL) {
if (node->n.other->selected) show_handles = TRUE;
}
if (node->subpath->nodepath->show_handles == false)
show_handles = FALSE;
sp_node_update_handle(node, -1, show_handles, fire_move_signals);
sp_node_update_handle(node, 1, show_handles, fire_move_signals);
}
/**
* Call sp_node_update_handles() for all nodes on subpath.
*/
static void sp_nodepath_subpath_update_handles(Inkscape::NodePath::SubPath *subpath)
{
g_assert(subpath != NULL);
for (GList *l = subpath->nodes; l != NULL; l = l->next) {
sp_node_update_handles((Inkscape::NodePath::Node *) l->data);
}
}
/**
* Call sp_nodepath_subpath_update_handles() for all subpaths of nodepath.
*/
static void sp_nodepath_update_handles(Inkscape::NodePath::Path *nodepath)
{
g_assert(nodepath != NULL);
for (GList *l = nodepath->subpaths; l != NULL; l = l->next) {
sp_nodepath_subpath_update_handles((Inkscape::NodePath::SubPath *) l->data);
}
}
void
sp_nodepath_show_handles(Inkscape::NodePath::Path *nodepath, bool show)
{
if (nodepath) {
nodepath->show_handles = show;
sp_nodepath_update_handles(nodepath);
}
}
/**
* Adds all selected nodes in nodepath to list.
*/
void Inkscape::NodePath::Path::selection(std::list<Node *> &l)
{
StlConv<Node *>::list(l, selected);
/// \todo this adds a copying, rework when the selection becomes a stl list
}
/**
* Align selected nodes on the specified axis.
*/
void sp_nodepath_selected_align(Inkscape::NodePath::Path *nodepath, Geom::Dim2 axis)
{
if ( !nodepath || !nodepath->selected ) { // no nodepath, or no nodes selected
return;
}
if ( !nodepath->selected->next ) { // only one node selected
return;
}
Inkscape::NodePath::Node *pNode = reinterpret_cast<Inkscape::NodePath::Node *>(nodepath->selected->data);
Geom::Point dest(pNode->pos);
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
pNode = reinterpret_cast<Inkscape::NodePath::Node *>(l->data);
if (pNode) {
dest[axis] = pNode->pos[axis];
sp_node_moveto(pNode, dest);
}
}
sp_nodepath_update_repr(nodepath, _("Align nodes"));
}
/// Helper struct.
struct NodeSort
{
Inkscape::NodePath::Node *_node;
Geom::Coord _coord;
/// \todo use vectorof pointers instead of calling copy ctor
NodeSort(Inkscape::NodePath::Node *node, Geom::Dim2 axis) :
_node(node), _coord(node->pos[axis])
{}
};
static bool operator<(NodeSort const &a, NodeSort const &b)
{
return (a._coord < b._coord);
}
/**
* Distribute selected nodes on the specified axis.
*/
void sp_nodepath_selected_distribute(Inkscape::NodePath::Path *nodepath, Geom::Dim2 axis)
{
if ( !nodepath || !nodepath->selected ) { // no nodepath, or no nodes selected
return;
}
if ( ! (nodepath->selected->next && nodepath->selected->next->next) ) { // less than 3 nodes selected
return;
}
Inkscape::NodePath::Node *pNode = reinterpret_cast<Inkscape::NodePath::Node *>(nodepath->selected->data);
std::vector<NodeSort> sorted;
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
pNode = reinterpret_cast<Inkscape::NodePath::Node *>(l->data);
if (pNode) {
NodeSort n(pNode, axis);
sorted.push_back(n);
//dest[axis] = pNode->pos[axis];
//sp_node_moveto(pNode, dest);
}
}
std::sort(sorted.begin(), sorted.end());
unsigned int len = sorted.size();
//overall bboxes span
float dist = (sorted.back()._coord -
sorted.front()._coord);
//new distance between each bbox
float step = (dist) / (len - 1);
float pos = sorted.front()._coord;
for ( std::vector<NodeSort> ::iterator it(sorted.begin());
it < sorted.end();
it ++ )
{
Geom::Point dest((*it)._node->pos);
dest[axis] = pos;
sp_node_moveto((*it)._node, dest);
pos += step;
}
sp_nodepath_update_repr(nodepath, _("Distribute nodes"));
}
/**
* Call sp_nodepath_line_add_node() for all selected segments.
*/
void
sp_node_selected_add_node(Inkscape::NodePath::Path *nodepath)
{
if (!nodepath) {
return;
}
GList *nl = NULL;
int n_added = 0;
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *t = (Inkscape::NodePath::Node *) l->data;
g_assert(t->selected);
if (t->p.other && t->p.other->selected) {
nl = g_list_prepend(nl, t);
}
}
while (nl) {
Inkscape::NodePath::Node *t = (Inkscape::NodePath::Node *) nl->data;
Inkscape::NodePath::Node *n = sp_nodepath_line_add_node(t, 0.5);
sp_nodepath_node_select(n, TRUE, FALSE);
n_added ++;
nl = g_list_remove(nl, t);
}
/** \todo fixme: adjust ? */
sp_nodepath_update_handles(nodepath);
if (n_added > 1) {
sp_nodepath_update_repr(nodepath, _("Add nodes"));
} else if (n_added > 0) {
sp_nodepath_update_repr(nodepath, _("Add node"));
}
sp_nodepath_update_statusbar(nodepath);
}
/**
* Select segment nearest to point
*/
void
sp_nodepath_select_segment_near_point(Inkscape::NodePath::Path *nodepath, Geom::Point p, bool toggle)
{
if (!nodepath) {
return;
}
SPCurve *curve = create_curve(nodepath); // perhaps we can use nodepath->curve here instead?
Geom::PathVector const &pathv = curve->get_pathvector();
boost::optional<Geom::PathVectorPosition> pvpos = Geom::nearestPoint(pathv, p);
if (!pvpos) {
g_print ("Possible error?\n");
return;
}
// calculate index for nodepath's representation.
unsigned int segment_index = floor(pvpos->t) + 1;
for (unsigned int i = 0; i < pvpos->path_nr; ++i) {
segment_index += pathv[i].size() + 1;
if (pathv[i].closed()) {
segment_index += 1;
}
}
curve->unref();
//find segment to segment
Inkscape::NodePath::Node *e = sp_nodepath_get_node_by_index(nodepath, segment_index);
//fixme: this can return NULL, so check before proceeding.
g_return_if_fail(e != NULL);
gboolean force = FALSE;
if (!(e->selected && (!e->p.other || e->p.other->selected))) {
force = TRUE;
}
sp_nodepath_node_select(e, (gboolean) toggle, force);
if (e->p.other)
sp_nodepath_node_select(e->p.other, TRUE, force);
sp_nodepath_update_handles(nodepath);
sp_nodepath_update_statusbar(nodepath);
}
/**
* Add a node nearest to point
*/
void
sp_nodepath_add_node_near_point(Inkscape::NodePath::Path *nodepath, Geom::Point p)
{
if (!nodepath) {
return;
}
SPCurve *curve = create_curve(nodepath); // perhaps we can use nodepath->curve here instead?
Geom::PathVector const &pathv = curve->get_pathvector();
boost::optional<Geom::PathVectorPosition> pvpos = Geom::nearestPoint(pathv, p);
if (!pvpos) {
g_print ("Possible error?\n");
return;
}
// calculate index for nodepath's representation.
double int_part;
double t = std::modf(pvpos->t, &int_part);
unsigned int segment_index = (unsigned int)int_part + 1;
for (unsigned int i = 0; i < pvpos->path_nr; ++i) {
segment_index += pathv[i].size() + 1;
if (pathv[i].closed()) {
segment_index += 1;
}
}
curve->unref();
//find segment to split
Inkscape::NodePath::Node *e = sp_nodepath_get_node_by_index(nodepath, segment_index);
if (!e) {
return;
}
//don't know why but t seems to flip for lines
if (sp_node_path_code_from_side(e, sp_node_get_side(e, -1)) == NR_LINETO) {
t = 1.0 - t;
}
Inkscape::NodePath::Node *n = sp_nodepath_line_add_node(e, t);
sp_nodepath_node_select(n, FALSE, TRUE);
/* fixme: adjust ? */
sp_nodepath_update_handles(nodepath);
sp_nodepath_update_repr(nodepath, _("Add node"));
sp_nodepath_update_statusbar(nodepath);
}
/*
* Adjusts a segment so that t moves by a certain delta for dragging
* converts lines to curves
*
* method and idea borrowed from Simon Budig <simon@gimp.org> and the GIMP
* cf. app/vectors/gimpbezierstroke.c, gimp_bezier_stroke_point_move_relative()
*/
void
sp_nodepath_curve_drag(Inkscape::NodePath::Path *nodepath, int node, double t, Geom::Point delta)
{
Inkscape::NodePath::Node *e = sp_nodepath_get_node_by_index(nodepath, node);
//fixme: e and e->p can be NULL, so check for those before proceeding
g_return_if_fail(e != NULL);
g_return_if_fail(&e->p != NULL);
if (e->type == Inkscape::NodePath::NODE_AUTO) {
e->type = Inkscape::NodePath::NODE_SMOOTH;
sp_nodepath_update_node_knot (e);
}
if (e->p.other->type == Inkscape::NodePath::NODE_AUTO) {
e->p.other->type = Inkscape::NodePath::NODE_SMOOTH;
sp_nodepath_update_node_knot (e->p.other);
}
/* feel good is an arbitrary parameter that distributes the delta between handles
* if t of the drag point is less than 1/6 distance form the endpoint only
* the corresponding hadle is adjusted. This matches the behavior in GIMP
*/
double feel_good;
if (t <= 1.0 / 6.0)
feel_good = 0;
else if (t <= 0.5)
feel_good = (pow((6 * t - 1) / 2.0, 3)) / 2;
else if (t <= 5.0 / 6.0)
feel_good = (1 - pow((6 * (1-t) - 1) / 2.0, 3)) / 2 + 0.5;
else
feel_good = 1;
//if we're dragging a line convert it to a curve
if (sp_node_path_code_from_side(e, sp_node_get_side(e, -1))==NR_LINETO) {
sp_nodepath_set_line_type(e, NR_CURVETO);
}
Geom::Point offsetcoord0 = ((1-feel_good)/(3*t*(1-t)*(1-t))) * delta;
Geom::Point offsetcoord1 = (feel_good/(3*t*t*(1-t))) * delta;
e->p.other->n.pos += offsetcoord0;
e->p.pos += offsetcoord1;
// adjust handles of adjacent nodes where necessary
sp_node_adjust_handle(e,1);
sp_node_adjust_handle(e->p.other,-1);
sp_nodepath_update_handles(e->subpath->nodepath);
update_object(e->subpath->nodepath);
sp_nodepath_update_statusbar(e->subpath->nodepath);
}
/**
* Call sp_nodepath_break() for all selected segments.
*/
void sp_node_selected_break(Inkscape::NodePath::Path *nodepath)
{
if (!nodepath) return;
GList *tempin = g_list_copy(nodepath->selected);
GList *temp = NULL;
for (GList *l = tempin; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
Inkscape::NodePath::Node *nn = sp_nodepath_node_break(n);
if (nn == NULL) continue; // no break, no new node
temp = g_list_prepend(temp, nn);
}
g_list_free(tempin);
if (temp) {
sp_nodepath_deselect(nodepath);
}
for (GList *l = temp; l != NULL; l = l->next) {
sp_nodepath_node_select((Inkscape::NodePath::Node *) l->data, TRUE, TRUE);
}
sp_nodepath_update_handles(nodepath);
sp_nodepath_update_repr(nodepath, _("Break path"));
}
/**
* Duplicate the selected node(s).
*/
void sp_node_selected_duplicate(Inkscape::NodePath::Path *nodepath)
{
if (!nodepath) {
return;
}
GList *temp = NULL;
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
Inkscape::NodePath::Node *nn = sp_nodepath_node_duplicate(n);
if (nn == NULL) continue; // could not duplicate
temp = g_list_prepend(temp, nn);
}
if (temp) {
sp_nodepath_deselect(nodepath);
}
for (GList *l = temp; l != NULL; l = l->next) {
sp_nodepath_node_select((Inkscape::NodePath::Node *) l->data, TRUE, TRUE);
}
sp_nodepath_update_handles(nodepath);
sp_nodepath_update_repr(nodepath, _("Duplicate node"));
}
/**
* Internal function to join two nodes by merging them into one.
*/
static void do_node_selected_join(Inkscape::NodePath::Path *nodepath, Inkscape::NodePath::Node *a, Inkscape::NodePath::Node *b)
{
/* a and b are endpoints */
// if one of the two nodes is mouseovered, fix its position
Geom::Point c;
if (a->knot && SP_KNOT_IS_MOUSEOVER(a->knot)) {
c = a->pos;
} else if (b->knot && SP_KNOT_IS_MOUSEOVER(b->knot)) {
c = b->pos;
} else {
// otherwise, move joined node to the midpoint
c = (a->pos + b->pos) / 2;
}
if (a->subpath == b->subpath) {
Inkscape::NodePath::SubPath *sp = a->subpath;
sp_nodepath_subpath_close(sp);
sp_node_moveto (sp->first, c);
sp_nodepath_update_handles(sp->nodepath);
sp_nodepath_update_repr(nodepath, _("Close subpath"));
return;
}
/* a and b are separate subpaths */
Inkscape::NodePath::SubPath *sa = a->subpath;
Inkscape::NodePath::SubPath *sb = b->subpath;
Geom::Point p;
Inkscape::NodePath::Node *n;
NRPathcode code;
if (a == sa->first) {
// we will now reverse sa, so that a is its last node, not first, and drop that node
p = sa->first->n.pos;
code = (NRPathcode)sa->first->n.other->code;
// create new subpath
Inkscape::NodePath::SubPath *t = sp_nodepath_subpath_new(sa->nodepath);
// create a first moveto node on it
n = sa->last;
sp_nodepath_node_new(t, NULL,Inkscape::NodePath::NODE_CUSP, NR_MOVETO, &n->n.pos, &n->pos, &n->p.pos);
n = n->p.other;
if (n == sa->first) n = NULL;
while (n) {
// copy the rest of the nodes from sa to t, going backwards
sp_nodepath_node_new(t, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->n.other->code, &n->n.pos, &n->pos, &n->p.pos);
n = n->p.other;
if (n == sa->first) n = NULL;
}
// replace sa with t
sp_nodepath_subpath_destroy(sa);
sa = t;
} else if (a == sa->last) {
// a is already last, just drop it
p = sa->last->p.pos;
code = (NRPathcode)sa->last->code;
sp_nodepath_node_destroy(sa->last);
} else {
code = NR_END;
g_assert_not_reached();
}
if (b == sb->first) {
// copy all nodes from b to a, forward
sp_nodepath_node_new(sa, NULL,Inkscape::NodePath::NODE_CUSP, code, &p, &c, &sb->first->n.pos);
for (n = sb->first->n.other; n != NULL; n = n->n.other) {
sp_nodepath_node_new(sa, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->code, &n->p.pos, &n->pos, &n->n.pos);
}
} else if (b == sb->last) {
// copy all nodes from b to a, backward
sp_nodepath_node_new(sa, NULL,Inkscape::NodePath::NODE_CUSP, code, &p, &c, &sb->last->p.pos);
for (n = sb->last->p.other; n != NULL; n = n->p.other) {
sp_nodepath_node_new(sa, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->n.other->code, &n->n.pos, &n->pos, &n->p.pos);
}
} else {
g_assert_not_reached();
}
/* and now destroy sb */
sp_nodepath_subpath_destroy(sb);
sp_nodepath_update_handles(sa->nodepath);
sp_nodepath_update_repr(nodepath, _("Join nodes"));
sp_nodepath_update_statusbar(nodepath);
}
/**
* Internal function to join two nodes by adding a segment between them.
*/
static void do_node_selected_join_segment(Inkscape::NodePath::Path *nodepath, Inkscape::NodePath::Node *a, Inkscape::NodePath::Node *b)
{
if (a->subpath == b->subpath) {
Inkscape::NodePath::SubPath *sp = a->subpath;
/*similar to sp_nodepath_subpath_close(sp), without the node destruction*/
sp->closed = TRUE;
sp->first->p.other = sp->last;
sp->last->n.other = sp->first;
sp_node_handle_mirror_p_to_n(sp->last);
sp_node_handle_mirror_n_to_p(sp->first);
sp->first->code = sp->last->code;
sp->first = sp->last;
sp_nodepath_update_handles(sp->nodepath);
sp_nodepath_update_repr(nodepath, _("Close subpath by segment"));
return;
}
/* a and b are separate subpaths */
Inkscape::NodePath::SubPath *sa = a->subpath;
Inkscape::NodePath::SubPath *sb = b->subpath;
Inkscape::NodePath::Node *n;
Geom::Point p;
NRPathcode code;
if (a == sa->first) {
code = (NRPathcode) sa->first->n.other->code;
Inkscape::NodePath::SubPath *t = sp_nodepath_subpath_new(sa->nodepath);
n = sa->last;
sp_nodepath_node_new(t, NULL,Inkscape::NodePath::NODE_CUSP, NR_MOVETO, &n->n.pos, &n->pos, &n->p.pos);
for (n = n->p.other; n != NULL; n = n->p.other) {
sp_nodepath_node_new(t, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->n.other->code, &n->n.pos, &n->pos, &n->p.pos);
}
sp_nodepath_subpath_destroy(sa);
sa = t;
} else if (a == sa->last) {
code = (NRPathcode)sa->last->code;
} else {
code = NR_END;
g_assert_not_reached();
}
if (b == sb->first) {
n = sb->first;
sp_node_handle_mirror_p_to_n(sa->last);
sp_nodepath_node_new(sa, NULL,Inkscape::NodePath::NODE_CUSP, code, &n->p.pos, &n->pos, &n->n.pos);
sp_node_handle_mirror_n_to_p(sa->last);
for (n = n->n.other; n != NULL; n = n->n.other) {
sp_nodepath_node_new(sa, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->code, &n->p.pos, &n->pos, &n->n.pos);
}
} else if (b == sb->last) {
n = sb->last;
sp_node_handle_mirror_p_to_n(sa->last);
sp_nodepath_node_new(sa, NULL,Inkscape::NodePath::NODE_CUSP, code, &p, &n->pos, &n->p.pos);
sp_node_handle_mirror_n_to_p(sa->last);
for (n = n->p.other; n != NULL; n = n->p.other) {
sp_nodepath_node_new(sa, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->n.other->code, &n->n.pos, &n->pos, &n->p.pos);
}
} else {
g_assert_not_reached();
}
/* and now destroy sb */
sp_nodepath_subpath_destroy(sb);
sp_nodepath_update_handles(sa->nodepath);
sp_nodepath_update_repr(nodepath, _("Join nodes by segment"));
}
enum NodeJoinType { NODE_JOIN_ENDPOINTS, NODE_JOIN_SEGMENT };
/**
* Internal function to handle joining two nodes.
*/
static void node_do_selected_join(Inkscape::NodePath::Path *nodepath, NodeJoinType mode)
{
if (!nodepath) return; // there's no nodepath when editing rects, stars, spirals or ellipses
if (g_list_length(nodepath->selected) != 2) {
nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("To join, you must have <b>two endnodes</b> selected."));
return;
}
Inkscape::NodePath::Node *a = (Inkscape::NodePath::Node *) nodepath->selected->data;
Inkscape::NodePath::Node *b = (Inkscape::NodePath::Node *) nodepath->selected->next->data;
g_assert(a != b);
if (!(a->p.other || a->n.other) || !(b->p.other || b->n.other)) {
// someone tried to join an orphan node (i.e. a single-node subpath).
// this is not worth an error message, just fail silently.
return;
}
if (((a->subpath->closed) || (b->subpath->closed)) || (a->p.other && a->n.other) || (b->p.other && b->n.other)) {
nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("To join, you must have <b>two endnodes</b> selected."));
return;
}
switch(mode) {
case NODE_JOIN_ENDPOINTS:
do_node_selected_join(nodepath, a, b);
break;
case NODE_JOIN_SEGMENT:
do_node_selected_join_segment(nodepath, a, b);
break;
}
}
/**
* Join two nodes by merging them into one.
*/
void sp_node_selected_join(Inkscape::NodePath::Path *nodepath)
{
node_do_selected_join(nodepath, NODE_JOIN_ENDPOINTS);
}
/**
* Join two nodes by adding a segment between them.
*/
void sp_node_selected_join_segment(Inkscape::NodePath::Path *nodepath)
{
node_do_selected_join(nodepath, NODE_JOIN_SEGMENT);
}
/**
* Delete one or more selected nodes and preserve the shape of the path as much as possible.
*/
void sp_node_delete_preserve(GList *nodes_to_delete)
{
GSList *nodepaths = NULL;
while (nodes_to_delete) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node*) g_list_first(nodes_to_delete)->data;
Inkscape::NodePath::SubPath *sp = node->subpath;
Inkscape::NodePath::Path *nodepath = sp->nodepath;
Inkscape::NodePath::Node *sample_cursor = NULL;
Inkscape::NodePath::Node *sample_end = NULL;
Inkscape::NodePath::Node *delete_cursor = node;
bool just_delete = false;
//find the start of this contiguous selection
//move left to the first node that is not selected
//or the start of the non-closed path
for (Inkscape::NodePath::Node *curr=node->p.other; curr && curr!=node && g_list_find(nodes_to_delete, curr); curr=curr->p.other) {
delete_cursor = curr;
}
//just delete at the beginning of an open path
if (!delete_cursor->p.other) {
sample_cursor = delete_cursor;
just_delete = true;
} else {
sample_cursor = delete_cursor->p.other;
}
//calculate points for each segment
int rate = 5;
float period = 1.0 / rate;
std::vector<Geom::Point> data;
if (!just_delete) {
data.push_back(sample_cursor->pos);
for (Inkscape::NodePath::Node *curr=sample_cursor; curr; curr=curr->n.other) {
//just delete at the end of an open path
if (!sp->closed && curr == sp->last) {
just_delete = true;
break;
}
//sample points on the contiguous selected segment
Geom::Point *bez;
bez = new Geom::Point [4];
bez[0] = curr->pos;
bez[1] = curr->n.pos;
bez[2] = curr->n.other->p.pos;
bez[3] = curr->n.other->pos;
for (int i=1; i<rate; i++) {
gdouble t = i * period;
Geom::Point p = bezier_pt(3, bez, t);
data.push_back(p);
}
data.push_back(curr->n.other->pos);
sample_end = curr->n.other;
//break if we've come full circle or hit the end of the selection
if (!g_list_find(nodes_to_delete, curr->n.other) || curr->n.other==sample_cursor) {
break;
}
}
}
if (!just_delete) {
//calculate the best fitting single segment and adjust the endpoints
Geom::Point *adata;
adata = new Geom::Point [data.size()];
copy(data.begin(), data.end(), adata);
Geom::Point *bez;
bez = new Geom::Point [4];
//would decreasing error create a better fitting approximation?
gdouble error = 1.0;
gint ret;
ret = Geom::bezier_fit_cubic (bez, adata, data.size(), error);
//if these nodes are smooth or symmetrical, the endpoints will be thrown out of sync.
//make sure these nodes are changed to cusp nodes so that, once the endpoints are moved,
//the resulting nodes behave as expected.
if (sample_cursor->type != Inkscape::NodePath::NODE_CUSP)
sp_nodepath_convert_node_type(sample_cursor, Inkscape::NodePath::NODE_CUSP);
if (sample_end->type != Inkscape::NodePath::NODE_CUSP)
sp_nodepath_convert_node_type(sample_end, Inkscape::NodePath::NODE_CUSP);
//adjust endpoints
sample_cursor->n.pos = bez[1];
sample_end->p.pos = bez[2];
}
//destroy this contiguous selection
while (delete_cursor && g_list_find(nodes_to_delete, delete_cursor)) {
Inkscape::NodePath::Node *temp = delete_cursor;
if (delete_cursor->n.other == delete_cursor) {
// delete_cursor->n points to itself, which means this is the last node on a closed subpath
delete_cursor = NULL;
} else {
delete_cursor = delete_cursor->n.other;
}
nodes_to_delete = g_list_remove(nodes_to_delete, temp);
sp_nodepath_node_destroy(temp);
}
sp_nodepath_update_handles(nodepath);
if (!g_slist_find(nodepaths, nodepath))
nodepaths = g_slist_prepend (nodepaths, nodepath);
}
for (GSList *i = nodepaths; i; i = i->next) {
// FIXME: when/if we teach node tool to have more than one nodepath, deleting nodes from
// different nodepaths will give us one undo event per nodepath
Inkscape::NodePath::Path *nodepath = (Inkscape::NodePath::Path *) i->data;
// if the entire nodepath is removed, delete the selected object.
if (nodepath->subpaths == NULL ||
//FIXME: a closed path CAN legally have one node, it's only an open one which must be
//at least 2
sp_nodepath_get_node_count(nodepath) < 2) {
SPDocument *document = sp_desktop_document (nodepath->desktop);
//FIXME: The following line will be wrong when we have mltiple nodepaths: we only want to
//delete this nodepath's object, not the entire selection! (though at this time, this
//does not matter)
sp_selection_delete(nodepath->desktop);
sp_document_done (document, SP_VERB_CONTEXT_NODE,
_("Delete nodes"));
} else {
sp_nodepath_update_repr(nodepath, _("Delete nodes preserving shape"));
sp_nodepath_update_statusbar(nodepath);
}
}
g_slist_free (nodepaths);
}
/**
* Delete one or more selected nodes.
*/
void sp_node_selected_delete(Inkscape::NodePath::Path *nodepath)
{
if (!nodepath) return;
if (!nodepath->selected) return;
/** \todo fixme: do it the right way */
while (nodepath->selected) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nodepath->selected->data;
sp_nodepath_node_destroy(node);
}
//clean up the nodepath (such as for trivial subpaths)
sp_nodepath_cleanup(nodepath);
sp_nodepath_update_handles(nodepath);
// if the entire nodepath is removed, delete the selected object.
if (nodepath->subpaths == NULL ||
sp_nodepath_get_node_count(nodepath) < 2) {
SPDocument *document = sp_desktop_document (nodepath->desktop);
sp_selection_delete(nodepath->desktop);
sp_document_done (document, SP_VERB_CONTEXT_NODE,
_("Delete nodes"));
return;
}
sp_nodepath_update_repr(nodepath, _("Delete nodes"));
sp_nodepath_update_statusbar(nodepath);
}
/**
* Delete one or more segments between two selected nodes.
* This is the code for 'split'.
*/
void
sp_node_selected_delete_segment(Inkscape::NodePath::Path *nodepath)
{
Inkscape::NodePath::Node *start, *end; //Start , end nodes. not inclusive
Inkscape::NodePath::Node *curr, *next; //Iterators
if (!nodepath) return; // there's no nodepath when editing rects, stars, spirals or ellipses
if (g_list_length(nodepath->selected) != 2) {
nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE,
_("Select <b>two non-endpoint nodes</b> on a path between which to delete segments."));
return;
}
//Selected nodes, not inclusive
Inkscape::NodePath::Node *a = (Inkscape::NodePath::Node *) nodepath->selected->data;
Inkscape::NodePath::Node *b = (Inkscape::NodePath::Node *) nodepath->selected->next->data;
if ( ( a==b) || //same node
(a->subpath != b->subpath ) || //not the same path
(!a->p.other || !a->n.other) || //one of a's sides does not have a segment
(!b->p.other || !b->n.other) ) //one of b's sides does not have a segment
{
nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE,
_("Select <b>two non-endpoint nodes</b> on a path between which to delete segments."));
return;
}
//###########################################
//# BEGIN EDITS
//###########################################
//##################################
//# CLOSED PATH
//##################################
if (a->subpath->closed) {
gboolean reversed = FALSE;
//Since we can go in a circle, we need to find the shorter distance.
// a->b or b->a
start = end = NULL;
int distance = 0;
int minDistance = 0;
for (curr = a->n.other ; curr && curr!=a ; curr=curr->n.other) {
if (curr==b) {
//printf("a to b:%d\n", distance);
start = a;//go from a to b
end = b;
minDistance = distance;
//printf("A to B :\n");
break;
}
distance++;
}
//try again, the other direction
distance = 0;
for (curr = b->n.other ; curr && curr!=b ; curr=curr->n.other) {
if (curr==a) {
//printf("b to a:%d\n", distance);
if (distance < minDistance) {
start = b; //we go from b to a
end = a;
reversed = TRUE;
//printf("B to A\n");
}
break;
}
distance++;
}
//Copy everything from 'end' to 'start' to a new subpath
Inkscape::NodePath::SubPath *t = sp_nodepath_subpath_new(nodepath);
for (curr=end ; curr ; curr=curr->n.other) {
NRPathcode code = (NRPathcode) curr->code;
if (curr == end)
code = NR_MOVETO;
sp_nodepath_node_new(t, NULL,
(Inkscape::NodePath::NodeType)curr->type, code,
&curr->p.pos, &curr->pos, &curr->n.pos);
if (curr == start)
break;
}
sp_nodepath_subpath_destroy(a->subpath);
}
//##################################
//# OPEN PATH
//##################################
else {
//We need to get the direction of the list between A and B
//Can we walk from a to b?
start = end = NULL;
for (curr = a->n.other ; curr && curr!=a ; curr=curr->n.other) {
if (curr==b) {
start = a; //did it! we go from a to b
end = b;
//printf("A to B\n");
break;
}
}
if (!start) {//didn't work? let's try the other direction
for (curr = b->n.other ; curr && curr!=b ; curr=curr->n.other) {
if (curr==a) {
start = b; //did it! we go from b to a
end = a;
//printf("B to A\n");
break;
}
}
}
if (!start) {
nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE,
_("Cannot find path between nodes."));
return;
}
//Copy everything after 'end' to a new subpath
Inkscape::NodePath::SubPath *t = sp_nodepath_subpath_new(nodepath);
for (curr=end ; curr ; curr=curr->n.other) {
NRPathcode code = (NRPathcode) curr->code;
if (curr == end)
code = NR_MOVETO;
sp_nodepath_node_new(t, NULL, (Inkscape::NodePath::NodeType)curr->type, code,
&curr->p.pos, &curr->pos, &curr->n.pos);
}
//Now let us do our deletion. Since the tail has been saved, go all the way to the end of the list
for (curr = start->n.other ; curr ; curr=next) {
next = curr->n.other;
sp_nodepath_node_destroy(curr);
}
}
//###########################################
//# END EDITS
//###########################################
//clean up the nodepath (such as for trivial subpaths)
sp_nodepath_cleanup(nodepath);
sp_nodepath_update_handles(nodepath);
sp_nodepath_update_repr(nodepath, _("Delete segment"));
sp_nodepath_update_statusbar(nodepath);
}
/**
* Call sp_nodepath_set_line() for all selected segments.
*/
void
sp_node_selected_set_line_type(Inkscape::NodePath::Path *nodepath, NRPathcode code)
{
if (nodepath == NULL) return;
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
g_assert(n->selected);
if (n->p.other && n->p.other->selected) {
sp_nodepath_set_line_type(n, code);
}
}
sp_nodepath_update_repr(nodepath, _("Change segment type"));
}
/**
* Call sp_nodepath_convert_node_type() for all selected nodes.
*/
void
sp_node_selected_set_type(Inkscape::NodePath::Path *nodepath, Inkscape::NodePath::NodeType type)
{
if (nodepath == NULL) return;
if (nodepath->straight_path) return; // don't change type when it is a straight path!
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
sp_nodepath_convert_node_type((Inkscape::NodePath::Node *) l->data, type);
}
sp_nodepath_update_repr(nodepath, _("Change node type"));
}
/**
* Change select status of node, update its own and neighbour handles.
*/
static void sp_node_set_selected(Inkscape::NodePath::Node *node, gboolean selected)
{
node->selected = selected;
if (selected) {
node->knot->setSize ((node->type == Inkscape::NodePath::NODE_CUSP || node->type == Inkscape::NodePath::NODE_AUTO) ? 11 : 9);
node->knot->setFill(NODE_FILL_SEL, NODE_FILL_SEL_HI, NODE_FILL_SEL_HI);
node->knot->setStroke(NODE_STROKE_SEL, NODE_STROKE_SEL_HI, NODE_STROKE_SEL_HI);
sp_knot_update_ctrl(node->knot);
} else {
node->knot->setSize ((node->type == Inkscape::NodePath::NODE_CUSP || node->type == Inkscape::NodePath::NODE_AUTO) ? 9 : 7);
node->knot->setFill(NODE_FILL, NODE_FILL_HI, NODE_FILL_HI);
node->knot->setStroke(NODE_STROKE, NODE_STROKE_HI, NODE_STROKE_HI);
sp_knot_update_ctrl(node->knot);
}
sp_node_update_handles(node);
if (node->n.other) sp_node_update_handles(node->n.other);
if (node->p.other) sp_node_update_handles(node->p.other);
}
/**
\brief Select a node
\param node The node to select
\param incremental If true, add to selection, otherwise deselect others
\param override If true, always select this node, otherwise toggle selected status
*/
static void sp_nodepath_node_select(Inkscape::NodePath::Node *node, gboolean incremental, gboolean override)
{
Inkscape::NodePath::Path *nodepath = node->subpath->nodepath;
if (incremental) {
if (override) {
if (!g_list_find(nodepath->selected, node)) {
nodepath->selected = g_list_prepend(nodepath->selected, node);
}
sp_node_set_selected(node, TRUE);
} else { // toggle
if (node->selected) {
g_assert(g_list_find(nodepath->selected, node));
nodepath->selected = g_list_remove(nodepath->selected, node);
} else {
g_assert(!g_list_find(nodepath->selected, node));
nodepath->selected = g_list_prepend(nodepath->selected, node);
}
sp_node_set_selected(node, !node->selected);
}
} else {
sp_nodepath_deselect(nodepath);
nodepath->selected = g_list_prepend(nodepath->selected, node);
sp_node_set_selected(node, TRUE);
}
sp_nodepath_update_statusbar(nodepath);
}
/**
\brief Deselect all nodes in the nodepath
*/
void
sp_nodepath_deselect(Inkscape::NodePath::Path *nodepath)
{
if (!nodepath) return; // there's no nodepath when editing rects, stars, spirals or ellipses
while (nodepath->selected) {
sp_node_set_selected((Inkscape::NodePath::Node *) nodepath->selected->data, FALSE);
nodepath->selected = g_list_remove(nodepath->selected, nodepath->selected->data);
}
sp_nodepath_update_statusbar(nodepath);
}
/**
\brief Select or invert selection of all nodes in the nodepath
*/
void
sp_nodepath_select_all(Inkscape::NodePath::Path *nodepath, bool invert)
{
if (!nodepath) return;
for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
sp_nodepath_node_select(node, TRUE, invert? !node->selected : TRUE);
}
}
}
/**
* If nothing selected, does the same as sp_nodepath_select_all();
* otherwise selects/inverts all nodes in all subpaths that have selected nodes
* (i.e., similar to "select all in layer", with the "selected" subpaths
* being treated as "layers" in the path).
*/
void
sp_nodepath_select_all_from_subpath(Inkscape::NodePath::Path *nodepath, bool invert)
{
if (!nodepath) return;
if (g_list_length (nodepath->selected) == 0) {
sp_nodepath_select_all (nodepath, invert);
return;
}
GList *copy = g_list_copy (nodepath->selected); // copy initial selection so that selecting in the loop does not affect us
GSList *subpaths = NULL;
for (GList *l = copy; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
Inkscape::NodePath::SubPath *subpath = n->subpath;
if (!g_slist_find (subpaths, subpath))
subpaths = g_slist_prepend (subpaths, subpath);
}
for (GSList *sp = subpaths; sp != NULL; sp = sp->next) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) sp->data;
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
sp_nodepath_node_select(node, TRUE, invert? !g_list_find(copy, node) : TRUE);
}
}
g_slist_free (subpaths);
g_list_free (copy);
}
/**
* \brief Select the node after the last selected; if none is selected,
* select the first within path.
*/
void sp_nodepath_select_next(Inkscape::NodePath::Path *nodepath)
{
if (!nodepath) return; // there's no nodepath when editing rects, stars, spirals or ellipses
Inkscape::NodePath::Node *last = NULL;
if (nodepath->selected) {
for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *subpath, *subpath_next;
subpath = (Inkscape::NodePath::SubPath *) spl->data;
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
if (node->selected) {
if (node->n.other == (Inkscape::NodePath::Node *) subpath->last) {
if (node->n.other == (Inkscape::NodePath::Node *) subpath->first) { // closed subpath
if (spl->next) { // there's a next subpath
subpath_next = (Inkscape::NodePath::SubPath *) spl->next->data;
last = subpath_next->first;
} else if (spl->prev) { // there's a previous subpath
last = NULL; // to be set later to the first node of first subpath
} else {
last = node->n.other;
}
} else {
last = node->n.other;
}
} else {
if (node->n.other) {
last = node->n.other;
} else {
if (spl->next) { // there's a next subpath
subpath_next = (Inkscape::NodePath::SubPath *) spl->next->data;
last = subpath_next->first;
} else if (spl->prev) { // there's a previous subpath
last = NULL; // to be set later to the first node of first subpath
} else {
last = (Inkscape::NodePath::Node *) subpath->first;
}
}
}
}
}
}
sp_nodepath_deselect(nodepath);
}
if (last) { // there's at least one more node after selected
sp_nodepath_node_select((Inkscape::NodePath::Node *) last, TRUE, TRUE);
} else { // no more nodes, select the first one in first subpath
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) nodepath->subpaths->data;
sp_nodepath_node_select((Inkscape::NodePath::Node *) subpath->first, TRUE, TRUE);
}
}
/**
* \brief Select the node before the first selected; if none is selected,
* select the last within path
*/
void sp_nodepath_select_prev(Inkscape::NodePath::Path *nodepath)
{
if (!nodepath) return; // there's no nodepath when editing rects, stars, spirals or ellipses
Inkscape::NodePath::Node *last = NULL;
if (nodepath->selected) {
for (GList *spl = g_list_last(nodepath->subpaths); spl != NULL; spl = spl->prev) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
for (GList *nl = g_list_last(subpath->nodes); nl != NULL; nl = nl->prev) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
if (node->selected) {
if (node->p.other == (Inkscape::NodePath::Node *) subpath->first) {
if (node->p.other == (Inkscape::NodePath::Node *) subpath->last) { // closed subpath
if (spl->prev) { // there's a prev subpath
Inkscape::NodePath::SubPath *subpath_prev = (Inkscape::NodePath::SubPath *) spl->prev->data;
last = subpath_prev->last;
} else if (spl->next) { // there's a next subpath
last = NULL; // to be set later to the last node of last subpath
} else {
last = node->p.other;
}
} else {
last = node->p.other;
}
} else {
if (node->p.other) {
last = node->p.other;
} else {
if (spl->prev) { // there's a prev subpath
Inkscape::NodePath::SubPath *subpath_prev = (Inkscape::NodePath::SubPath *) spl->prev->data;
last = subpath_prev->last;
} else if (spl->next) { // there's a next subpath
last = NULL; // to be set later to the last node of last subpath
} else {
last = (Inkscape::NodePath::Node *) subpath->last;
}
}
}
}
}
}
sp_nodepath_deselect(nodepath);
}
if (last) { // there's at least one more node before selected
sp_nodepath_node_select((Inkscape::NodePath::Node *) last, TRUE, TRUE);
} else { // no more nodes, select the last one in last subpath
GList *spl = g_list_last(nodepath->subpaths);
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
sp_nodepath_node_select((Inkscape::NodePath::Node *) subpath->last, TRUE, TRUE);
}
}
/**
* \brief Select all nodes that are within the rectangle.
*/
void sp_nodepath_select_rect(Inkscape::NodePath::Path *nodepath, Geom::Rect const &b, gboolean incremental)
{
if (!incremental) {
sp_nodepath_deselect(nodepath);
}
for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
if (b.contains(node->pos)) {
sp_nodepath_node_select(node, TRUE, TRUE);
}
}
}
}
void
nodepath_grow_selection_linearly (Inkscape::NodePath::Path *nodepath, Inkscape::NodePath::Node *n, int grow)
{
g_assert (n);
g_assert (nodepath);
g_assert (n->subpath->nodepath == nodepath);
if (g_list_length (nodepath->selected) == 0) {
if (grow > 0) {
sp_nodepath_node_select(n, TRUE, TRUE);
}
return;
}
if (g_list_length (nodepath->selected) == 1) {
if (grow < 0) {
sp_nodepath_deselect (nodepath);
return;
}
}
double n_sel_range = 0, p_sel_range = 0;
Inkscape::NodePath::Node *farthest_n_node = n;
Inkscape::NodePath::Node *farthest_p_node = n;
// Calculate ranges
{
double n_range = 0, p_range = 0;
bool n_going = true, p_going = true;
Inkscape::NodePath::Node *n_node = n;
Inkscape::NodePath::Node *p_node = n;
do {
// Do one step in both directions from n, until reaching the end of subpath or bumping into each other
if (n_node && n_going)
n_node = n_node->n.other;
if (n_node == NULL) {
n_going = false;
} else {
n_range += bezier_length (n_node->p.other->pos, n_node->p.other->n.pos, n_node->p.pos, n_node->pos);
if (n_node->selected) {
n_sel_range = n_range;
farthest_n_node = n_node;
}
if (n_node == p_node) {
n_going = false;
p_going = false;
}
}
if (p_node && p_going)
p_node = p_node->p.other;
if (p_node == NULL) {
p_going = false;
} else {
p_range += bezier_length (p_node->n.other->pos, p_node->n.other->p.pos, p_node->n.pos, p_node->pos);
if (p_node->selected) {
p_sel_range = p_range;
farthest_p_node = p_node;
}
if (p_node == n_node) {
n_going = false;
p_going = false;
}
}
} while (n_going || p_going);
}
if (grow > 0) {
if (n_sel_range < p_sel_range && farthest_n_node && farthest_n_node->n.other && !(farthest_n_node->n.other->selected)) {
sp_nodepath_node_select(farthest_n_node->n.other, TRUE, TRUE);
} else if (farthest_p_node && farthest_p_node->p.other && !(farthest_p_node->p.other->selected)) {
sp_nodepath_node_select(farthest_p_node->p.other, TRUE, TRUE);
}
} else {
if (n_sel_range > p_sel_range && farthest_n_node && farthest_n_node->selected) {
sp_nodepath_node_select(farthest_n_node, TRUE, FALSE);
} else if (farthest_p_node && farthest_p_node->selected) {
sp_nodepath_node_select(farthest_p_node, TRUE, FALSE);
}
}
}
void
nodepath_grow_selection_spatially (Inkscape::NodePath::Path *nodepath, Inkscape::NodePath::Node *n, int grow)
{
g_assert (n);
g_assert (nodepath);
g_assert (n->subpath->nodepath == nodepath);
if (g_list_length (nodepath->selected) == 0) {
if (grow > 0) {
sp_nodepath_node_select(n, TRUE, TRUE);
}
return;
}
if (g_list_length (nodepath->selected) == 1) {
if (grow < 0) {
sp_nodepath_deselect (nodepath);
return;
}
}
Inkscape::NodePath::Node *farthest_selected = NULL;
double farthest_dist = 0;
Inkscape::NodePath::Node *closest_unselected = NULL;
double closest_dist = NR_HUGE;
for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
if (node == n)
continue;
if (node->selected) {
if (Geom::L2(node->pos - n->pos) > farthest_dist) {
farthest_dist = Geom::L2(node->pos - n->pos);
farthest_selected = node;
}
} else {
if (Geom::L2(node->pos - n->pos) < closest_dist) {
closest_dist = Geom::L2(node->pos - n->pos);
closest_unselected = node;
}
}
}
}
if (grow > 0) {
if (closest_unselected) {
sp_nodepath_node_select(closest_unselected, TRUE, TRUE);
}
} else {
if (farthest_selected) {
sp_nodepath_node_select(farthest_selected, TRUE, FALSE);
}
}
}
/**
\brief Saves all nodes' and handles' current positions in their origin members
*/
void
sp_nodepath_remember_origins(Inkscape::NodePath::Path *nodepath)
{
for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) nl->data;
n->origin = n->pos;
n->p.origin = n->p.pos;
n->n.origin = n->n.pos;
}
}
}
/**
\brief Saves selected nodes in a nodepath into a list containing integer positions of all selected nodes
*/
GList *save_nodepath_selection(Inkscape::NodePath::Path *nodepath)
{
GList *r = NULL;
if (nodepath->selected) {
guint i = 0;
for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
i++;
if (node->selected) {
r = g_list_append(r, GINT_TO_POINTER(i));
}
}
}
}
return r;
}
/**
\brief Restores selection by selecting nodes whose positions are in the list
*/
void restore_nodepath_selection(Inkscape::NodePath::Path *nodepath, GList *r)
{
sp_nodepath_deselect(nodepath);
guint i = 0;
for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) {
Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data;
for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data;
i++;
if (g_list_find(r, GINT_TO_POINTER(i))) {
sp_nodepath_node_select(node, TRUE, TRUE);
}
}
}
}
/**
\brief Adjusts handle according to node type and line code.
*/
static void sp_node_adjust_handle(Inkscape::NodePath::Node *node, gint which_adjust)
{
g_assert(node);
// nothing to do for auto nodes (sp_node_adjust_handles() does the job)
if (node->type == Inkscape::NodePath::NODE_AUTO)
return;
Inkscape::NodePath::NodeSide *me = sp_node_get_side(node, which_adjust);
Inkscape::NodePath::NodeSide *other = sp_node_opposite_side(node, me);
// nothing to do if we are an end node
if (me->other == NULL) return;
if (other->other == NULL) return;
// nothing to do if we are a cusp node
if (node->type == Inkscape::NodePath::NODE_CUSP) return;
// nothing to do if it's a line from the specified side of the node (i.e. no handle to adjust)
NRPathcode mecode;
if (which_adjust == 1) {
mecode = (NRPathcode)me->other->code;
} else {
mecode = (NRPathcode)node->code;
}
if (mecode == NR_LINETO) return;
if (sp_node_side_is_line(node, other)) {
// other is a line, and we are either smooth or symm
Inkscape::NodePath::Node *othernode = other->other;
double len = Geom::L2(me->pos - node->pos);
Geom::Point delta = node->pos - othernode->pos;
double linelen = Geom::L2(delta);
if (linelen < 1e-18)
return;
me->pos = node->pos + (len / linelen)*delta;
return;
}
if (node->type == Inkscape::NodePath::NODE_SYMM) {
// symmetrize
me->pos = 2 * node->pos - other->pos;
return;
} else {
// smoothify
double len = Geom::L2(me->pos - node->pos);
Geom::Point delta = other->pos - node->pos;
double otherlen = Geom::L2(delta);
if (otherlen < 1e-18) return;
me->pos = node->pos - (len / otherlen) * delta;
}
}
/**
\brief Adjusts both handles according to node type and line code
*/
static void sp_node_adjust_handles(Inkscape::NodePath::Node *node)
{
g_assert(node);
if (node->type == Inkscape::NodePath::NODE_CUSP) return;
/* we are either smooth or symm */
if (node->p.other == NULL) return;
if (node->n.other == NULL) return;
if (node->type == Inkscape::NodePath::NODE_AUTO) {
sp_node_adjust_handles_auto(node);
return;
}
if (sp_node_side_is_line(node, &node->p)) {
sp_node_adjust_handle(node, 1);
return;
}
if (sp_node_side_is_line(node, &node->n)) {
sp_node_adjust_handle(node, -1);
return;
}
/* both are curves */
Geom::Point const delta( node->n.pos - node->p.pos );
if (node->type == Inkscape::NodePath::NODE_SYMM) {
node->p.pos = node->pos - delta / 2;
node->n.pos = node->pos + delta / 2;
return;
}
/* We are smooth */
double plen = Geom::L2(node->p.pos - node->pos);
if (plen < 1e-18) return;
double nlen = Geom::L2(node->n.pos - node->pos);
if (nlen < 1e-18) return;
node->p.pos = node->pos - (plen / (plen + nlen)) * delta;
node->n.pos = node->pos + (nlen / (plen + nlen)) * delta;
}
static void sp_node_adjust_handles_auto(Inkscape::NodePath::Node *node)
{
if (node->p.other == NULL || node->n.other == NULL) {
node->p.pos = node->pos;
node->n.pos = node->pos;
return;
}
Geom::Point leg_prev = to_2geom(node->p.other->pos - node->pos);
Geom::Point leg_next = to_2geom(node->n.other->pos - node->pos);
double norm_leg_prev = Geom::L2(leg_prev);
double norm_leg_next = Geom::L2(leg_next);
Geom::Point delta;
if (norm_leg_next > 0.0) {
delta = (norm_leg_prev / norm_leg_next) * leg_next - leg_prev;
delta.normalize();
}
node->p.pos = node->pos - norm_leg_prev / 3 * delta;
node->n.pos = node->pos + norm_leg_next / 3 * delta;
}
/**
* Node event callback.
*/
static gboolean node_event(SPKnot */*knot*/, GdkEvent *event, Inkscape::NodePath::Node *n)
{
gboolean ret = FALSE;
switch (event->type) {
case GDK_ENTER_NOTIFY:
Inkscape::NodePath::Path::active_node = n;
break;
case GDK_LEAVE_NOTIFY:
Inkscape::NodePath::Path::active_node = NULL;
break;
case GDK_SCROLL:
if ((event->scroll.state & GDK_CONTROL_MASK) && !(event->scroll.state & GDK_SHIFT_MASK)) { // linearly
switch (event->scroll.direction) {
case GDK_SCROLL_UP:
nodepath_grow_selection_linearly (n->subpath->nodepath, n, +1);
break;
case GDK_SCROLL_DOWN:
nodepath_grow_selection_linearly (n->subpath->nodepath, n, -1);
break;
default:
break;
}
ret = TRUE;
} else if (!(event->scroll.state & GDK_SHIFT_MASK)) { // spatially
switch (event->scroll.direction) {
case GDK_SCROLL_UP:
nodepath_grow_selection_spatially (n->subpath->nodepath, n, +1);
break;
case GDK_SCROLL_DOWN:
nodepath_grow_selection_spatially (n->subpath->nodepath, n, -1);
break;
default:
break;
}
ret = TRUE;
}
break;
case GDK_KEY_PRESS:
switch (get_group0_keyval (&event->key)) {
case GDK_space:
if (event->key.state & GDK_BUTTON1_MASK) {
Inkscape::NodePath::Path *nodepath = n->subpath->nodepath;
stamp_repr(nodepath);
ret = TRUE;
}
break;
case GDK_Page_Up:
if (event->key.state & GDK_CONTROL_MASK) {
nodepath_grow_selection_linearly (n->subpath->nodepath, n, +1);
} else {
nodepath_grow_selection_spatially (n->subpath->nodepath, n, +1);
}
break;
case GDK_Page_Down:
if (event->key.state & GDK_CONTROL_MASK) {
nodepath_grow_selection_linearly (n->subpath->nodepath, n, -1);
} else {
nodepath_grow_selection_spatially (n->subpath->nodepath, n, -1);
}
break;
default:
break;
}
break;
default:
break;
}
return ret;
}
/**
* Handle keypress on node; directly called.
*/
gboolean node_key(GdkEvent *event)
{
Inkscape::NodePath::Path *np;
// there is no way to verify nodes so set active_node to nil when deleting!!
if (Inkscape::NodePath::Path::active_node == NULL) return FALSE;
if ((event->type == GDK_KEY_PRESS) && !(event->key.state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK))) {
gint ret = FALSE;
switch (get_group0_keyval (&event->key)) {
/// \todo FIXME: this does not seem to work, the keys are stolen by tool contexts!
case GDK_BackSpace:
np = Inkscape::NodePath::Path::active_node->subpath->nodepath;
sp_nodepath_node_destroy(Inkscape::NodePath::Path::active_node);
sp_nodepath_update_repr(np, _("Delete node"));
Inkscape::NodePath::Path::active_node = NULL;
ret = TRUE;
break;
case GDK_c:
sp_nodepath_set_node_type(Inkscape::NodePath::Path::active_node,Inkscape::NodePath::NODE_CUSP);
ret = TRUE;
break;
case GDK_s:
sp_nodepath_set_node_type(Inkscape::NodePath::Path::active_node,Inkscape::NodePath::NODE_SMOOTH);
ret = TRUE;
break;
case GDK_a:
sp_nodepath_set_node_type(Inkscape::NodePath::Path::active_node,Inkscape::NodePath::NODE_AUTO);
ret = TRUE;
break;
case GDK_y:
sp_nodepath_set_node_type(Inkscape::NodePath::Path::active_node,Inkscape::NodePath::NODE_SYMM);
ret = TRUE;
break;
case GDK_b:
sp_nodepath_node_break(Inkscape::NodePath::Path::active_node);
ret = TRUE;
break;
}
return ret;
}
return FALSE;
}
/**
* Mouseclick on node callback.
*/
static void node_clicked(SPKnot */*knot*/, guint state, gpointer data)
{
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data;
if (state & GDK_CONTROL_MASK) {
Inkscape::NodePath::Path *nodepath = n->subpath->nodepath;
if (!(state & GDK_MOD1_MASK)) { // ctrl+click: toggle node type
if (n->type == Inkscape::NodePath::NODE_CUSP) {
sp_nodepath_convert_node_type (n,Inkscape::NodePath::NODE_SMOOTH);
} else if (n->type == Inkscape::NodePath::NODE_SMOOTH) {
sp_nodepath_convert_node_type (n,Inkscape::NodePath::NODE_SYMM);
} else if (n->type == Inkscape::NodePath::NODE_SYMM) {
sp_nodepath_convert_node_type (n,Inkscape::NodePath::NODE_AUTO);
} else {
sp_nodepath_convert_node_type (n,Inkscape::NodePath::NODE_CUSP);
}
sp_nodepath_update_repr(nodepath, _("Change node type"));
sp_nodepath_update_statusbar(nodepath);
} else { //ctrl+alt+click: delete node
GList *node_to_delete = NULL;
node_to_delete = g_list_append(node_to_delete, n);
sp_node_delete_preserve(node_to_delete);
}
} else {
sp_nodepath_node_select(n, (state & GDK_SHIFT_MASK), FALSE);
}
}
/**
* Mouse grabbed node callback.
*/
static void node_grabbed(SPKnot *knot, guint state, gpointer data)
{
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data;
if (!n->selected) {
sp_nodepath_node_select(n, (state & GDK_SHIFT_MASK), FALSE);
}
n->is_dragging = true;
// Reconstruct and store the location of the mouse pointer at the time when we started dragging (needed for snapping)
n->subpath->nodepath->drag_origin_mouse = knot->grabbed_rel_pos + knot->drag_origin;
sp_canvas_force_full_redraw_after_interruptions(n->subpath->nodepath->desktop->canvas, 5);
sp_nodepath_remember_origins (n->subpath->nodepath);
}
/**
* Mouse ungrabbed node callback.
*/
static void node_ungrabbed(SPKnot */*knot*/, guint /*state*/, gpointer data)
{
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data;
n->dragging_out = NULL;
n->is_dragging = false;
n->subpath->nodepath->drag_origin_mouse = Geom::Point(NR_HUGE, NR_HUGE);
sp_canvas_end_forced_full_redraws(n->subpath->nodepath->desktop->canvas);
sp_nodepath_update_repr(n->subpath->nodepath, _("Move nodes"));
}
/**
* The point on a line, given by its angle, closest to the given point.
* \param p A point.
* \param a Angle of the line; it is assumed to go through coordinate origin.
* \param closest Pointer to the point struct where the result is stored.
* \todo FIXME: use dot product perhaps?
*/
static void point_line_closest(Geom::Point *p, double a, Geom::Point *closest)
{
if (a == HUGE_VAL) { // vertical
*closest = Geom::Point(0, (*p)[Geom::Y]);
} else {
(*closest)[Geom::X] = ( a * (*p)[Geom::Y] + (*p)[Geom::X]) / (a*a + 1);
(*closest)[Geom::Y] = a * (*closest)[Geom::X];
}
}
/**
* Distance from the point to a line given by its angle.
* \param p A point.
* \param a Angle of the line; it is assumed to go through coordinate origin.
*/
static double point_line_distance(Geom::Point *p, double a)
{
Geom::Point c;
point_line_closest(p, a, &c);
return sqrt(((*p)[Geom::X] - c[Geom::X])*((*p)[Geom::X] - c[Geom::X]) + ((*p)[Geom::Y] - c[Geom::Y])*((*p)[Geom::Y] - c[Geom::Y]));
}
/**
* Callback for node "request" signal.
* \todo fixme: This goes to "moved" event? (lauris)
*/
static gboolean
node_request(SPKnot */*knot*/, Geom::Point const &p, guint state, gpointer data)
{
double yn, xn, yp, xp;
double an, ap, na, pa;
double d_an, d_ap, d_na, d_pa;
gboolean collinear = FALSE;
Geom::Point c;
Geom::Point pr;
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data;
n->subpath->nodepath->desktop->snapindicator->remove_snaptarget();
// If either (Shift and some handle retracted), or (we're already dragging out a handle)
if ( (!n->subpath->nodepath->straight_path) &&
( ((state & GDK_SHIFT_MASK) && ((n->n.other && n->n.pos == n->pos) || (n->p.other && n->p.pos == n->pos)))
|| n->dragging_out ) )
{
Geom::Point mouse = p;
if (!n->dragging_out) {
// This is the first drag-out event; find out which handle to drag out
double appr_n = (n->n.other ? Geom::L2(n->n.other->pos - n->pos) - Geom::L2(n->n.other->pos - p) : -HUGE_VAL);
double appr_p = (n->p.other ? Geom::L2(n->p.other->pos - n->pos) - Geom::L2(n->p.other->pos - p) : -HUGE_VAL);
if (appr_p == -HUGE_VAL && appr_n == -HUGE_VAL) // orphan node?
return FALSE;
Inkscape::NodePath::NodeSide *opposite;
if (appr_p > appr_n) { // closer to p
n->dragging_out = &n->p;
opposite = &n->n;
n->code = NR_CURVETO;
} else if (appr_p < appr_n) { // closer to n
n->dragging_out = &n->n;
opposite = &n->p;
n->n.other->code = NR_CURVETO;
} else { // p and n nodes are the same
if (n->n.pos != n->pos) { // n handle already dragged, drag p
n->dragging_out = &n->p;
opposite = &n->n;
n->code = NR_CURVETO;
} else if (n->p.pos != n->pos) { // p handle already dragged, drag n
n->dragging_out = &n->n;
opposite = &n->p;
n->n.other->code = NR_CURVETO;
} else { // find out to which handle of the adjacent node we're closer; note that n->n.other == n->p.other
double appr_other_n = (n->n.other ? Geom::L2(n->n.other->n.pos - n->pos) - Geom::L2(n->n.other->n.pos - p) : -HUGE_VAL);
double appr_other_p = (n->n.other ? Geom::L2(n->n.other->p.pos - n->pos) - Geom::L2(n->n.other->p.pos - p) : -HUGE_VAL);
if (appr_other_p > appr_other_n) { // closer to other's p handle
n->dragging_out = &n->n;
opposite = &n->p;
n->n.other->code = NR_CURVETO;
} else { // closer to other's n handle
n->dragging_out = &n->p;
opposite = &n->n;
n->code = NR_CURVETO;
}
}
}
// if there's another handle, make sure the one we drag out starts parallel to it
if (opposite->pos != n->pos) {
mouse = n->pos - Geom::L2(mouse - n->pos) * Geom::unit_vector(opposite->pos - n->pos);
}
// knots might not be created yet!
sp_node_ensure_knot_exists (n->subpath->nodepath->desktop, n, n->dragging_out);
sp_node_ensure_knot_exists (n->subpath->nodepath->desktop, n, opposite);
}
// pass this on to the handle-moved callback
node_handle_moved(n->dragging_out->knot, mouse, state, (gpointer) n);
sp_node_update_handles(n);
return TRUE;
}
if (state & GDK_CONTROL_MASK) { // constrained motion
// calculate relative distances of handles
// n handle:
yn = n->n.pos[Geom::Y] - n->pos[Geom::Y];
xn = n->n.pos[Geom::X] - n->pos[Geom::X];
// if there's no n handle (straight line), see if we can use the direction to the next point on path
if ((n->n.other && n->n.other->code == NR_LINETO) || fabs(yn) + fabs(xn) < 1e-6) {
if (n->n.other) { // if there is the next point
if (L2(n->n.other->p.pos - n->n.other->pos) < 1e-6) // and the next point has no handle either
yn = n->n.other->origin[Geom::Y] - n->origin[Geom::Y]; // use origin because otherwise the direction will change as you drag
xn = n->n.other->origin[Geom::X] - n->origin[Geom::X];
}
}
if (xn < 0) { xn = -xn; yn = -yn; } // limit the angle to between 0 and pi
if (yn < 0) { xn = -xn; yn = -yn; }
// p handle:
yp = n->p.pos[Geom::Y] - n->pos[Geom::Y];
xp = n->p.pos[Geom::X] - n->pos[Geom::X];
// if there's no p handle (straight line), see if we can use the direction to the prev point on path
if (n->code == NR_LINETO || fabs(yp) + fabs(xp) < 1e-6) {
if (n->p.other) {
if (L2(n->p.other->n.pos - n->p.other->pos) < 1e-6)
yp = n->p.other->origin[Geom::Y] - n->origin[Geom::Y];
xp = n->p.other->origin[Geom::X] - n->origin[Geom::X];
}
}
if (xp < 0) { xp = -xp; yp = -yp; } // limit the angle to between 0 and pi
if (yp < 0) { xp = -xp; yp = -yp; }
if (state & GDK_MOD1_MASK && !(xn == 0 && xp == 0)) {
// sliding on handles, only if at least one of the handles is non-vertical
// (otherwise it's the same as ctrl+drag anyway)
// calculate angles of the handles
if (xn == 0) {
if (yn == 0) { // no handle, consider it the continuation of the other one
an = 0;
collinear = TRUE;
}
else an = 0; // vertical; set the angle to horizontal
} else an = yn/xn;
if (xp == 0) {
if (yp == 0) { // no handle, consider it the continuation of the other one
ap = an;
}
else ap = 0; // vertical; set the angle to horizontal
} else ap = yp/xp;
if (collinear) an = ap;
// angles of the perpendiculars; HUGE_VAL means vertical
if (an == 0) na = HUGE_VAL; else na = -1/an;
if (ap == 0) pa = HUGE_VAL; else pa = -1/ap;
// mouse point relative to the node's original pos
pr = p - n->origin;
// distances to the four lines (two handles and two perpendiculars)
d_an = point_line_distance(&pr, an);
d_na = point_line_distance(&pr, na);
d_ap = point_line_distance(&pr, ap);
d_pa = point_line_distance(&pr, pa);
// find out which line is the closest, save its closest point in c
if (d_an <= d_na && d_an <= d_ap && d_an <= d_pa) {
point_line_closest(&pr, an, &c);
} else if (d_ap <= d_an && d_ap <= d_na && d_ap <= d_pa) {
point_line_closest(&pr, ap, &c);
} else if (d_na <= d_an && d_na <= d_ap && d_na <= d_pa) {
point_line_closest(&pr, na, &c);
} else if (d_pa <= d_an && d_pa <= d_ap && d_pa <= d_na) {
point_line_closest(&pr, pa, &c);
}
// move the node to the closest point
sp_nodepath_selected_nodes_move(n->subpath->nodepath,
n->origin[Geom::X] + c[Geom::X] - n->pos[Geom::X],
n->origin[Geom::Y] + c[Geom::Y] - n->pos[Geom::Y],
true);
} else { // constraining to hor/vert
if (fabs(p[Geom::X] - n->origin[Geom::X]) > fabs(p[Geom::Y] - n->origin[Geom::Y])) { // snap to hor
sp_nodepath_selected_nodes_move(n->subpath->nodepath,
p[Geom::X] - n->pos[Geom::X],
n->origin[Geom::Y] - n->pos[Geom::Y],
true,
true, Inkscape::Snapper::ConstraintLine(component_vectors[Geom::X]));
} else { // snap to vert
sp_nodepath_selected_nodes_move(n->subpath->nodepath,
n->origin[Geom::X] - n->pos[Geom::X],
p[Geom::Y] - n->pos[Geom::Y],
true,
true, Inkscape::Snapper::ConstraintLine(component_vectors[Geom::Y]));
}
}
} else { // move freely
if (n->is_dragging) {
if (state & GDK_MOD1_MASK) { // sculpt
sp_nodepath_selected_nodes_sculpt(n->subpath->nodepath, n, p - n->origin);
} else {
sp_nodepath_selected_nodes_move(n->subpath->nodepath,
p[Geom::X] - n->pos[Geom::X],
p[Geom::Y] - n->pos[Geom::Y],
(state & GDK_SHIFT_MASK) == 0);
}
}
}
n->subpath->nodepath->desktop->scroll_to_point(p);
return TRUE;
}
/**
* Node handle clicked callback.
*/
static void node_handle_clicked(SPKnot *knot, guint state, gpointer data)
{
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data;
if (state & GDK_CONTROL_MASK) { // "delete" handle
if (n->p.knot == knot) {
n->p.pos = n->pos;
} else if (n->n.knot == knot) {
n->n.pos = n->pos;
}
sp_node_update_handles(n);
Inkscape::NodePath::Path *nodepath = n->subpath->nodepath;
sp_nodepath_update_repr(nodepath, _("Retract handle"));
sp_nodepath_update_statusbar(nodepath);
} else { // just select or add to selection, depending in Shift
sp_nodepath_node_select(n, (state & GDK_SHIFT_MASK), FALSE);
}
}
/**
* Node handle grabbed callback.
*/
static void node_handle_grabbed(SPKnot *knot, guint state, gpointer data)
{
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data;
// convert auto -> smooth when dragging handle
if (n->type == Inkscape::NodePath::NODE_AUTO) {
n->type = Inkscape::NodePath::NODE_SMOOTH;
sp_nodepath_update_node_knot (n);
}
if (!n->selected) {
sp_nodepath_node_select(n, (state & GDK_SHIFT_MASK), FALSE);
}
// remember the origin point of the handle
if (n->p.knot == knot) {
n->p.origin_radial = n->p.pos - n->pos;
} else if (n->n.knot == knot) {
n->n.origin_radial = n->n.pos - n->pos;
} else {
g_assert_not_reached();
}
sp_canvas_force_full_redraw_after_interruptions(n->subpath->nodepath->desktop->canvas, 5);
}
/**
* Node handle ungrabbed callback.
*/
static void node_handle_ungrabbed(SPKnot *knot, guint state, gpointer data)
{
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data;
// forget origin and set knot position once more (because it can be wrong now due to restrictions)
if (n->p.knot == knot) {
n->p.origin_radial.a = 0;
sp_knot_set_position(knot, n->p.pos, state);
} else if (n->n.knot == knot) {
n->n.origin_radial.a = 0;
sp_knot_set_position(knot, n->n.pos, state);
} else {
g_assert_not_reached();
}
sp_nodepath_update_repr(n->subpath->nodepath, _("Move node handle"));
}
/**
* Node handle "request" signal callback.
*/
static gboolean node_handle_request(SPKnot *knot, Geom::Point &p, guint state, gpointer data)
{
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data;
Inkscape::NodePath::NodeSide *me, *opposite;
gint which;
if (n->p.knot == knot) {
me = &n->p;
opposite = &n->n;
which = -1;
} else if (n->n.knot == knot) {
me = &n->n;
opposite = &n->p;
which = 1;
} else {
me = opposite = NULL;
which = 0;
g_assert_not_reached();
}
SPDesktop *desktop = n->subpath->nodepath->desktop;
SnapManager &m = desktop->namedview->snap_manager;
m.setup(desktop, true, n->subpath->nodepath->item);
Inkscape::SnappedPoint s;
if ((state & GDK_SHIFT_MASK) != 0) {
// We will not try to snap when the shift-key is pressed
// so remove the old snap indicator and don't wait for it to time-out
desktop->snapindicator->remove_snaptarget();
}
Inkscape::NodePath::Node *othernode = opposite->other;
Inkscape::SnapSourceType source_type = (n->type == Inkscape::NodePath::NODE_SMOOTH ? Inkscape::SNAPSOURCE_NODE_SMOOTH : Inkscape::SNAPSOURCE_NODE_CUSP);
if (othernode) {
if ((n->type != Inkscape::NodePath::NODE_CUSP) && sp_node_side_is_line(n, opposite)) {
/* We are smooth node adjacent with line */
Geom::Point const delta = p - n->pos;
Geom::Coord const len = Geom::L2(delta);
Inkscape::NodePath::Node *othernode = opposite->other;
Geom::Point const ndelta = n->pos - othernode->pos;
Geom::Coord const linelen = Geom::L2(ndelta);
if (len > NR_EPSILON && linelen > NR_EPSILON) {
Geom::Coord const scal = dot(delta, ndelta) / linelen;
p = n->pos + (scal / linelen) * ndelta;
}
if ((state & GDK_SHIFT_MASK) == 0) {
s = m.constrainedSnap(Inkscape::SnapPreferences::SNAPPOINT_NODE, p, source_type, Inkscape::Snapper::ConstraintLine(p, ndelta), false);
}
} else {
if ((state & GDK_SHIFT_MASK) == 0) {
s = m.freeSnap(Inkscape::SnapPreferences::SNAPPOINT_NODE, p, source_type);
}
}
} else {
if ((state & GDK_SHIFT_MASK) == 0) {
s = m.freeSnap(Inkscape::SnapPreferences::SNAPPOINT_NODE, p, source_type);
}
}
s.getPoint(p);
sp_node_adjust_handle(n, -which);
return FALSE;
}
/**
* Node handle moved callback.
*/
static void node_handle_moved(SPKnot *knot, Geom::Point const &p, guint state, gpointer data)
{
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data;
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
Inkscape::NodePath::NodeSide *me;
Inkscape::NodePath::NodeSide *other;
if (n->p.knot == knot) {
me = &n->p;
other = &n->n;
} else if (n->n.knot == knot) {
me = &n->n;
other = &n->p;
} else {
me = NULL;
other = NULL;
g_assert_not_reached();
}
// calculate radial coordinates of the grabbed handle, its other handle, and the mouse point
Radial rme(me->pos - n->pos);
Radial rother(other->pos - n->pos);
Radial rnew(p - n->pos);
if (state & GDK_CONTROL_MASK && rnew.a != HUGE_VAL) {
int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);
/* 0 interpreted as "no snapping". */
// 1. Snap to the closest PI/snaps angle, starting from zero.
double a_snapped = floor(rnew.a/(M_PI/snaps) + 0.5) * (M_PI/snaps);
// 2. Snap to the original angle, its opposite and perpendiculars
if (me->origin_radial.a != HUGE_VAL) { // otherwise ortho doesn't exist: original handle was zero length
/* The closest PI/2 angle, starting from original angle */
double const a_ortho = me->origin_radial.a + floor((rnew.a - me->origin_radial.a)/(M_PI/2) + 0.5) * (M_PI/2);
// Snap to the closest.
a_snapped = ( fabs(a_snapped - rnew.a) < fabs(a_ortho - rnew.a)
? a_snapped
: a_ortho );
}
// 3. Snap to the angle of the opposite line, if any
Inkscape::NodePath::Node *othernode = other->other;
if (othernode) {
Geom::Point other_to_snap(0,0);
if (sp_node_side_is_line(n, other)) {
other_to_snap = othernode->pos - n->pos;
} else {
other_to_snap = other->pos - n->pos;
}
if (Geom::L2(other_to_snap) > 1e-3) {
Radial rother_to_snap(other_to_snap);
/* The closest PI/2 angle, starting from the angle of the opposite line segment */
double const a_oppo = rother_to_snap.a + floor((rnew.a - rother_to_snap.a)/(M_PI/2) + 0.5) * (M_PI/2);
// Snap to the closest.
a_snapped = ( fabs(a_snapped - rnew.a) < fabs(a_oppo - rnew.a)
? a_snapped
: a_oppo );
}
}
rnew.a = a_snapped;
}
if (state & GDK_MOD1_MASK) {
// lock handle length
rnew.r = me->origin_radial.r;
}
if (( n->type !=Inkscape::NodePath::NODE_CUSP || (!n->dragging_out && (state & GDK_SHIFT_MASK)))
&& (rme.a != HUGE_VAL) && (rnew.a != HUGE_VAL) && ((fabs(rme.a - rnew.a) > 0.001) || (n->type ==Inkscape::NodePath::NODE_SYMM))) {
// rotate the other handle correspondingly, if both old and new angles exist and are not the same
rother.a += rnew.a - rme.a;
other->pos = Geom::Point(rother) + n->pos;
if (other->knot) {
sp_ctrlline_set_coords(SP_CTRLLINE(other->line), n->pos, other->pos);
sp_knot_moveto(other->knot, other->pos);
}
}
me->pos = Geom::Point(rnew) + n->pos;
sp_ctrlline_set_coords(SP_CTRLLINE(me->line), n->pos, me->pos);
// move knot, but without emitting the signal:
// we cannot emit a "moved" signal because we're now processing it
sp_knot_moveto(me->knot, me->pos);
update_object(n->subpath->nodepath);
/* status text */
SPDesktop *desktop = n->subpath->nodepath->desktop;
if (!desktop) return;
SPEventContext *ec = desktop->event_context;
if (!ec) return;
Inkscape::MessageContext *mc = get_message_context(ec);
if (!mc) return;
double degrees = 180 / M_PI * rnew.a;
if (degrees > 180) degrees -= 360;
if (degrees < -180) degrees += 360;
if (prefs->getBool("/options/compassangledisplay/value"))
degrees = angle_to_compass (degrees);
GString *length = SP_PX_TO_METRIC_STRING(rnew.r, desktop->namedview->getDefaultMetric());
mc->setF(Inkscape::IMMEDIATE_MESSAGE,
_("<b>Node handle</b>: angle %0.2f&#176;, length %s; with <b>Ctrl</b> to snap angle; with <b>Alt</b> to lock length; with <b>Shift</b> to rotate both handles"), degrees, length->str);
g_string_free(length, TRUE);
}
/**
* Node handle event callback.
*/
static gboolean node_handle_event(SPKnot *knot, GdkEvent *event,Inkscape::NodePath::Node *n)
{
gboolean ret = FALSE;
switch (event->type) {
case GDK_KEY_PRESS:
switch (get_group0_keyval (&event->key)) {
case GDK_space:
if (event->key.state & GDK_BUTTON1_MASK) {
Inkscape::NodePath::Path *nodepath = n->subpath->nodepath;
stamp_repr(nodepath);
ret = TRUE;
}
break;
default:
break;
}
break;
case GDK_ENTER_NOTIFY:
// we use an experimentally determined threshold that seems to work fine
if (Geom::L2(n->pos - knot->pos) < 0.75)
Inkscape::NodePath::Path::active_node = n;
break;
case GDK_LEAVE_NOTIFY:
// we use an experimentally determined threshold that seems to work fine
if (Geom::L2(n->pos - knot->pos) < 0.75)
Inkscape::NodePath::Path::active_node = NULL;
break;
default:
break;
}
return ret;
}
static void node_rotate_one_internal(Inkscape::NodePath::Node const &n, gdouble const angle,
Radial &rme, Radial &rother, gboolean const both)
{
rme.a += angle;
if ( both
|| ( n.type == Inkscape::NodePath::NODE_SMOOTH )
|| ( n.type == Inkscape::NodePath::NODE_SYMM ) )
{
rother.a += angle;
}
}
static void node_rotate_one_internal_screen(Inkscape::NodePath::Node const &n, gdouble const angle,
Radial &rme, Radial &rother, gboolean const both)
{
gdouble const norm_angle = angle / n.subpath->nodepath->desktop->current_zoom();
gdouble r;
if ( both
|| ( n.type == Inkscape::NodePath::NODE_SMOOTH )
|| ( n.type == Inkscape::NodePath::NODE_SYMM ) )
{
r = MAX(rme.r, rother.r);
} else {
r = rme.r;
}
gdouble const weird_angle = atan2(norm_angle, r);
/* Bulia says norm_angle is just the visible distance that the
* object's end must travel on the screen. Left as 'angle' for want of
* a better name.*/
rme.a += weird_angle;
if ( both
|| ( n.type == Inkscape::NodePath::NODE_SMOOTH )
|| ( n.type == Inkscape::NodePath::NODE_SYMM ) )
{
rother.a += weird_angle;
}
}
/**
* Rotate one node.
*/
static void node_rotate_one (Inkscape::NodePath::Node *n, gdouble angle, int which, gboolean screen)
{
Inkscape::NodePath::NodeSide *me, *other;
bool both = false;
double xn = n->n.other? n->n.other->pos[Geom::X] : n->pos[Geom::X];
double xp = n->p.other? n->p.other->pos[Geom::X] : n->pos[Geom::X];
if (!n->n.other) { // if this is an endnode, select its single handle regardless of "which"
me = &(n->p);
other = &(n->n);
} else if (!n->p.other) {
me = &(n->n);
other = &(n->p);
} else {
if (which > 0) { // right handle
if (xn > xp) {
me = &(n->n);
other = &(n->p);
} else {
me = &(n->p);
other = &(n->n);
}
} else if (which < 0){ // left handle
if (xn <= xp) {
me = &(n->n);
other = &(n->p);
} else {
me = &(n->p);
other = &(n->n);
}
} else { // both handles
me = &(n->n);
other = &(n->p);
both = true;
}
}
Radial rme(me->pos - n->pos);
Radial rother(other->pos - n->pos);
if (screen) {
node_rotate_one_internal_screen (*n, angle, rme, rother, both);
} else {
node_rotate_one_internal (*n, angle, rme, rother, both);
}
me->pos = n->pos + Geom::Point(rme);
if (both || n->type == Inkscape::NodePath::NODE_SMOOTH || n->type == Inkscape::NodePath::NODE_SYMM) {
other->pos = n->pos + Geom::Point(rother);
}
// this function is only called from sp_nodepath_selected_nodes_rotate that will update display at the end,
// so here we just move all the knots without emitting move signals, for speed
sp_node_update_handles(n, false);
}
/**
* Rotate selected nodes.
*/
void sp_nodepath_selected_nodes_rotate(Inkscape::NodePath::Path *nodepath, gdouble angle, int which, bool screen)
{
if (!nodepath || !nodepath->selected) return;
if (g_list_length(nodepath->selected) == 1) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) nodepath->selected->data;
node_rotate_one (n, angle, which, screen);
} else {
// rotate as an object:
Inkscape::NodePath::Node *n0 = (Inkscape::NodePath::Node *) nodepath->selected->data;
Geom::Rect box (n0->pos, n0->pos); // originally includes the first selected node
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
box.expandTo (n->pos); // contain all selected nodes
}
gdouble rot;
if (screen) {
gdouble const zoom = nodepath->desktop->current_zoom();
gdouble const zmove = angle / zoom;
gdouble const r = Geom::L2(box.max() - box.midpoint());
rot = atan2(zmove, r);
} else {
rot = angle;
}
Geom::Point rot_center;
if (Inkscape::NodePath::Path::active_node == NULL)
rot_center = box.midpoint();
else
rot_center = Inkscape::NodePath::Path::active_node->pos;
Geom::Matrix t =
Geom::Matrix (Geom::Translate(-rot_center)) *
Geom::Matrix (Geom::Rotate(rot)) *
Geom::Matrix (Geom::Translate(rot_center));
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
n->pos *= t;
n->n.pos *= t;
n->p.pos *= t;
sp_node_update_handles(n, false);
}
}
sp_nodepath_update_repr_keyed(nodepath, angle > 0 ? "nodes:rot:p" : "nodes:rot:n", _("Rotate nodes"));
}
/**
* Scale one node.
*/
static void node_scale_one (Inkscape::NodePath::Node *n, gdouble grow, int which)
{
bool both = false;
Inkscape::NodePath::NodeSide *me, *other;
double xn = n->n.other? n->n.other->pos[Geom::X] : n->pos[Geom::X];
double xp = n->p.other? n->p.other->pos[Geom::X] : n->pos[Geom::X];
if (!n->n.other) { // if this is an endnode, select its single handle regardless of "which"
me = &(n->p);
other = &(n->n);
n->code = NR_CURVETO;
} else if (!n->p.other) {
me = &(n->n);
other = &(n->p);
if (n->n.other)
n->n.other->code = NR_CURVETO;
} else {
if (which > 0) { // right handle
if (xn > xp) {
me = &(n->n);
other = &(n->p);
if (n->n.other)
n->n.other->code = NR_CURVETO;
} else {
me = &(n->p);
other = &(n->n);
n->code = NR_CURVETO;
}
} else if (which < 0){ // left handle
if (xn <= xp) {
me = &(n->n);
other = &(n->p);
if (n->n.other)
n->n.other->code = NR_CURVETO;
} else {
me = &(n->p);
other = &(n->n);
n->code = NR_CURVETO;
}
} else { // both handles
me = &(n->n);
other = &(n->p);
both = true;
n->code = NR_CURVETO;
if (n->n.other)
n->n.other->code = NR_CURVETO;
}
}
Radial rme(me->pos - n->pos);
Radial rother(other->pos - n->pos);
rme.r += grow;
if (rme.r < 0) rme.r = 0;
if (rme.a == HUGE_VAL) {
if (me->other) { // if direction is unknown, initialize it towards the next node
Radial rme_next(me->other->pos - n->pos);
rme.a = rme_next.a;
} else { // if there's no next, initialize to 0
rme.a = 0;
}
}
if (both || n->type == Inkscape::NodePath::NODE_SYMM) {
rother.r += grow;
if (rother.r < 0) rother.r = 0;
if (rother.a == HUGE_VAL) {
rother.a = rme.a + M_PI;
}
}
me->pos = n->pos + Geom::Point(rme);
if (both || n->type == Inkscape::NodePath::NODE_SYMM) {
other->pos = n->pos + Geom::Point(rother);
}
// this function is only called from sp_nodepath_selected_nodes_scale that will update display at the end,
// so here we just move all the knots without emitting move signals, for speed
sp_node_update_handles(n, false);
}
/**
* Scale selected nodes.
*/
void sp_nodepath_selected_nodes_scale(Inkscape::NodePath::Path *nodepath, gdouble const grow, int const which)
{
if (!nodepath || !nodepath->selected) return;
if (g_list_length(nodepath->selected) == 1) {
// scale handles of the single selected node
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) nodepath->selected->data;
node_scale_one (n, grow, which);
} else {
// scale nodes as an "object":
Inkscape::NodePath::Node *n0 = (Inkscape::NodePath::Node *) nodepath->selected->data;
Geom::Rect box (n0->pos, n0->pos); // originally includes the first selected node
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
box.expandTo (n->pos); // contain all selected nodes
}
if ( Geom::are_near(box.maxExtent(), 0) ) {
SPEventContext *ec = nodepath->desktop->event_context;
if (!ec) return;
Inkscape::MessageContext *mc = get_message_context(ec);
if (!mc) return;
mc->setF(Inkscape::WARNING_MESSAGE,
_("Cannot scale nodes when all are at the same location."));
return;
}
double scale = (box.maxExtent() + grow)/box.maxExtent();
Geom::Point scale_center;
if (Inkscape::NodePath::Path::active_node == NULL)
scale_center = box.midpoint();
else
scale_center = Inkscape::NodePath::Path::active_node->pos;
Geom::Matrix t =
Geom::Translate(-scale_center) *
Geom::Scale(scale, scale) *
Geom::Translate(scale_center);
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
n->pos *= t;
n->n.pos *= t;
n->p.pos *= t;
sp_node_update_handles(n, false);
}
}
sp_nodepath_update_repr_keyed(nodepath, grow > 0 ? "nodes:scale:p" : "nodes:scale:n", _("Scale nodes"));
}
void sp_nodepath_selected_nodes_scale_screen(Inkscape::NodePath::Path *nodepath, gdouble const grow, int const which)
{
if (!nodepath) return;
sp_nodepath_selected_nodes_scale(nodepath, grow / nodepath->desktop->current_zoom(), which);
}
/**
* Flip selected nodes horizontally/vertically.
*/
void sp_nodepath_flip (Inkscape::NodePath::Path *nodepath, Geom::Dim2 axis, boost::optional<Geom::Point> center)
{
if (!nodepath || !nodepath->selected) return;
if (g_list_length(nodepath->selected) == 1 && !center) {
// flip handles of the single selected node
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) nodepath->selected->data;
double temp = n->p.pos[axis];
n->p.pos[axis] = n->n.pos[axis];
n->n.pos[axis] = temp;
sp_node_update_handles(n, false);
} else {
// scale nodes as an "object":
Geom::Rect box = sp_node_selected_bbox (nodepath);
if (!center) {
center = box.midpoint();
}
Geom::Matrix t =
Geom::Matrix (Geom::Translate(- *center)) *
Geom::Matrix ((axis == Geom::X)? Geom::Scale(-1, 1) : Geom::Scale(1, -1)) *
Geom::Matrix (Geom::Translate(*center));
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
n->pos *= t;
n->n.pos *= t;
n->p.pos *= t;
sp_node_update_handles(n, false);
}
}
sp_nodepath_update_repr(nodepath, _("Flip nodes"));
}
Geom::Rect sp_node_selected_bbox (Inkscape::NodePath::Path *nodepath)
{
g_assert (nodepath->selected);
Inkscape::NodePath::Node *n0 = (Inkscape::NodePath::Node *) nodepath->selected->data;
Geom::Rect box (n0->pos, n0->pos); // originally includes the first selected node
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
box.expandTo (n->pos); // contain all selected nodes
}
return box;
}
//-----------------------------------------------
/**
* Return new subpath under given nodepath.
*/
static Inkscape::NodePath::SubPath *sp_nodepath_subpath_new(Inkscape::NodePath::Path *nodepath)
{
g_assert(nodepath);
g_assert(nodepath->desktop);
Inkscape::NodePath::SubPath *s = g_new(Inkscape::NodePath::SubPath, 1);
s->nodepath = nodepath;
s->closed = FALSE;
s->nodes = NULL;
s->first = NULL;
s->last = NULL;
// using prepend here saves up to 10% of time on paths with many subpaths, but requires that
// the caller reverses the list after it's ready (this is done in sp_nodepath_new)
nodepath->subpaths = g_list_prepend (nodepath->subpaths, s);
return s;
}
/**
* Destroy nodes in subpath, then subpath itself.
*/
static void sp_nodepath_subpath_destroy(Inkscape::NodePath::SubPath *subpath)
{
g_assert(subpath);
g_assert(subpath->nodepath);
g_assert(g_list_find(subpath->nodepath->subpaths, subpath));
while (subpath->nodes) {
sp_nodepath_node_destroy((Inkscape::NodePath::Node *) subpath->nodes->data);
}
subpath->nodepath->subpaths = g_list_remove(subpath->nodepath->subpaths, subpath);
g_free(subpath);
}
/**
* Link head to tail in subpath.
*/
static void sp_nodepath_subpath_close(Inkscape::NodePath::SubPath *sp)
{
g_assert(!sp->closed);
g_assert(sp->last != sp->first);
g_assert(sp->first->code == NR_MOVETO);
sp->closed = TRUE;
//Link the head to the tail
sp->first->p.other = sp->last;
sp->last->n.other = sp->first;
sp->last->n.pos = sp->last->pos + (sp->first->n.pos - sp->first->pos);
sp->first = sp->last;
//Remove the extra end node
sp_nodepath_node_destroy(sp->last->n.other);
}
/**
* Open closed (loopy) subpath at node.
*/
static void sp_nodepath_subpath_open(Inkscape::NodePath::SubPath *sp,Inkscape::NodePath::Node *n)
{
g_assert(sp->closed);
g_assert(n->subpath == sp);
g_assert(sp->first == sp->last);
/* We create new startpoint, current node will become last one */
Inkscape::NodePath::Node *new_path = sp_nodepath_node_new(sp, n->n.other,Inkscape::NodePath::NODE_CUSP, NR_MOVETO,
&n->pos, &n->pos, &n->n.pos);
sp->closed = FALSE;
//Unlink to make a head and tail
sp->first = new_path;
sp->last = n;
n->n.other = NULL;
new_path->p.other = NULL;
}
/**
* Return new node in subpath with given properties.
* \param pos Position of node.
* \param ppos Handle position in previous direction
* \param npos Handle position in previous direction
*/
Inkscape::NodePath::Node *
sp_nodepath_node_new(Inkscape::NodePath::SubPath *sp, Inkscape::NodePath::Node *next, Inkscape::NodePath::NodeType type, NRPathcode code, Geom::Point *ppos, Geom::Point *pos, Geom::Point *npos)
{
g_assert(sp);
g_assert(sp->nodepath);
g_assert(sp->nodepath->desktop);
if (nodechunk == NULL)
nodechunk = g_mem_chunk_create(Inkscape::NodePath::Node, 32, G_ALLOC_AND_FREE);
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node*)g_mem_chunk_alloc(nodechunk);
n->subpath = sp;
if (type != Inkscape::NodePath::NODE_NONE) {
// use the type from sodipodi:nodetypes
n->type = type;
} else {
if (fabs (Inkscape::Util::triangle_area (*pos, *ppos, *npos)) < 1e-2) {
// points are (almost) collinear
if (Geom::L2(*pos - *ppos) < 1e-6 || Geom::L2(*pos - *npos) < 1e-6) {
// endnode, or a node with a retracted handle
n->type = Inkscape::NodePath::NODE_CUSP;
} else {
n->type = Inkscape::NodePath::NODE_SMOOTH;
}
} else {
n->type = Inkscape::NodePath::NODE_CUSP;
}
}
n->code = code;
n->selected = FALSE;
n->pos = *pos;
n->p.pos = *ppos;
n->n.pos = *npos;
n->dragging_out = NULL;
Inkscape::NodePath::Node *prev;
if (next) {
//g_assert(g_list_find(sp->nodes, next));
prev = next->p.other;
} else {
prev = sp->last;
}
if (prev)
prev->n.other = n;
else
sp->first = n;
if (next)
next->p.other = n;
else
sp->last = n;
n->p.other = prev;
n->n.other = next;
n->knot = sp_knot_new(sp->nodepath->desktop, _("<b>Node</b>: drag to edit the path; with <b>Ctrl</b> to snap to horizontal/vertical; with <b>Ctrl+Alt</b> to snap to handles' directions"));
sp_knot_set_position(n->knot, *pos, 0);
n->knot->setAnchor (GTK_ANCHOR_CENTER);
n->knot->setFill(NODE_FILL, NODE_FILL_HI, NODE_FILL_HI);
n->knot->setStroke(NODE_STROKE, NODE_STROKE_HI, NODE_STROKE_HI);
sp_nodepath_update_node_knot(n);
g_signal_connect(G_OBJECT(n->knot), "event", G_CALLBACK(node_event), n);
g_signal_connect(G_OBJECT(n->knot), "clicked", G_CALLBACK(node_clicked), n);
g_signal_connect(G_OBJECT(n->knot), "grabbed", G_CALLBACK(node_grabbed), n);
g_signal_connect(G_OBJECT(n->knot), "ungrabbed", G_CALLBACK(node_ungrabbed), n);
g_signal_connect(G_OBJECT(n->knot), "request", G_CALLBACK(node_request), n);
sp_knot_show(n->knot);
// We only create handle knots and lines on demand
n->p.knot = NULL;
n->p.line = NULL;
n->n.knot = NULL;
n->n.line = NULL;
sp->nodes = g_list_prepend(sp->nodes, n);
return n;
}
/**
* Destroy node and its knots, link neighbors in subpath.
*/
static void sp_nodepath_node_destroy(Inkscape::NodePath::Node *node)
{
g_assert(node);
g_assert(node->subpath);
g_assert(SP_IS_KNOT(node->knot));
Inkscape::NodePath::SubPath *sp = node->subpath;
if (node->selected) { // first, deselect
g_assert(g_list_find(node->subpath->nodepath->selected, node));
node->subpath->nodepath->selected = g_list_remove(node->subpath->nodepath->selected, node);
}
node->subpath->nodes = g_list_remove(node->subpath->nodes, node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->knot), (gpointer) G_CALLBACK(node_event), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->knot), (gpointer) G_CALLBACK(node_clicked), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->knot), (gpointer) G_CALLBACK(node_grabbed), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->knot), (gpointer) G_CALLBACK(node_ungrabbed), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->knot), (gpointer) G_CALLBACK(node_request), node);
g_object_unref(G_OBJECT(node->knot));
if (node->p.knot) {
g_signal_handlers_disconnect_by_func(G_OBJECT(node->p.knot), (gpointer) G_CALLBACK(node_handle_clicked), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->p.knot), (gpointer) G_CALLBACK(node_handle_grabbed), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->p.knot), (gpointer) G_CALLBACK(node_handle_ungrabbed), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->p.knot), (gpointer) G_CALLBACK(node_handle_request), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->p.knot), (gpointer) G_CALLBACK(node_handle_moved), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->p.knot), (gpointer) G_CALLBACK(node_handle_event), node);
g_object_unref(G_OBJECT(node->p.knot));
node->p.knot = NULL;
}
if (node->n.knot) {
g_signal_handlers_disconnect_by_func(G_OBJECT(node->n.knot), (gpointer) G_CALLBACK(node_handle_clicked), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->n.knot), (gpointer) G_CALLBACK(node_handle_grabbed), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->n.knot), (gpointer) G_CALLBACK(node_handle_ungrabbed), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->n.knot), (gpointer) G_CALLBACK(node_handle_request), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->n.knot), (gpointer) G_CALLBACK(node_handle_moved), node);
g_signal_handlers_disconnect_by_func(G_OBJECT(node->n.knot), (gpointer) G_CALLBACK(node_handle_event), node);
g_object_unref(G_OBJECT(node->n.knot));
node->n.knot = NULL;
}
if (node->p.line)
gtk_object_destroy(GTK_OBJECT(node->p.line));
if (node->n.line)
gtk_object_destroy(GTK_OBJECT(node->n.line));
if (sp->nodes) { // there are others nodes on the subpath
if (sp->closed) {
if (sp->first == node) {
g_assert(sp->last == node);
sp->first = node->n.other;
sp->last = sp->first;
}
node->p.other->n.other = node->n.other;
node->n.other->p.other = node->p.other;
} else {
if (sp->first == node) {
sp->first = node->n.other;
sp->first->code = NR_MOVETO;
}
if (sp->last == node) sp->last = node->p.other;
if (node->p.other) node->p.other->n.other = node->n.other;
if (node->n.other) node->n.other->p.other = node->p.other;
}
} else { // this was the last node on subpath
sp->nodepath->subpaths = g_list_remove(sp->nodepath->subpaths, sp);
}
g_mem_chunk_free(nodechunk, node);
}
/**
* Returns one of the node's two sides.
* \param which Indicates which side.
* \return Pointer to previous node side if which==-1, next if which==1.
*/
static Inkscape::NodePath::NodeSide *sp_node_get_side(Inkscape::NodePath::Node *node, gint which)
{
g_assert(node);
Inkscape::NodePath::NodeSide * result = 0;
switch (which) {
case -1:
result = &node->p;
break;
case 1:
result = &node->n;
break;
default:
g_assert_not_reached();
}
return result;
}
/**
* Return the other side of the node, given one of its sides.
*/
static Inkscape::NodePath::NodeSide *sp_node_opposite_side(Inkscape::NodePath::Node *node, Inkscape::NodePath::NodeSide *me)
{
g_assert(node);
Inkscape::NodePath::NodeSide *result = 0;
if (me == &node->p) {
result = &node->n;
} else if (me == &node->n) {
result = &node->p;
} else {
g_assert_not_reached();
}
return result;
}
/**
* Return NRPathcode on the given side of the node.
*/
static NRPathcode sp_node_path_code_from_side(Inkscape::NodePath::Node *node,Inkscape::NodePath::NodeSide *me)
{
g_assert(node);
NRPathcode result = NR_END;
if (me == &node->p) {
if (node->p.other) {
result = (NRPathcode)node->code;
} else {
result = NR_MOVETO;
}
} else if (me == &node->n) {
if (node->n.other) {
result = (NRPathcode)node->n.other->code;
} else {
result = NR_MOVETO;
}
} else {
g_assert_not_reached();
}
return result;
}
/**
* Return node with the given index
*/
Inkscape::NodePath::Node *
sp_nodepath_get_node_by_index(Inkscape::NodePath::Path *nodepath, int index)
{
Inkscape::NodePath::Node *e = NULL;
if (!nodepath) {
return e;
}
//find segment
for (GList *l = nodepath->subpaths; l ; l=l->next) {
Inkscape::NodePath::SubPath *sp = (Inkscape::NodePath::SubPath *)l->data;
int n = g_list_length(sp->nodes);
if (sp->closed) {
n++;
}
//if the piece belongs to this subpath grab it
//otherwise move onto the next subpath
if (index < n) {
e = sp->first;
for (int i = 0; i < index; ++i) {
e = e->n.other;
}
break;
} else {
if (sp->closed) {
index -= (n+1);
} else {
index -= n;
}
}
}
return e;
}
/**
* Returns plain text meaning of node type.
*/
static gchar const *sp_node_type_description(Inkscape::NodePath::Node *node)
{
unsigned retracted = 0;
bool endnode = false;
for (int which = -1; which <= 1; which += 2) {
Inkscape::NodePath::NodeSide *side = sp_node_get_side(node, which);
if (side->other && Geom::L2(side->pos - node->pos) < 1e-6)
retracted ++;
if (!side->other)
endnode = true;
}
if (retracted == 0) {
if (endnode) {
// TRANSLATORS: "end" is an adjective here (NOT a verb)
return _("end node");
} else {
switch (node->type) {
case Inkscape::NodePath::NODE_CUSP:
// TRANSLATORS: "cusp" means "sharp" (cusp node); see also the Advanced Tutorial
return _("cusp");
case Inkscape::NodePath::NODE_SMOOTH:
// TRANSLATORS: "smooth" is an adjective here
return _("smooth");
case Inkscape::NodePath::NODE_AUTO:
return _("auto");
case Inkscape::NodePath::NODE_SYMM:
return _("symmetric");
}
}
} else if (retracted == 1) {
if (endnode) {
// TRANSLATORS: "end" is an adjective here (NOT a verb)
return _("end node, handle retracted (drag with <b>Shift</b> to extend)");
} else {
return _("one handle retracted (drag with <b>Shift</b> to extend)");
}
} else {
return _("both handles retracted (drag with <b>Shift</b> to extend)");
}
return NULL;
}
/**
* Handles content of statusbar as long as node tool is active.
*/
void
sp_nodepath_update_statusbar(Inkscape::NodePath::Path *nodepath)//!!!move to ShapeEditorsCollection
{
gchar const *when_selected = _("<b>Drag</b> nodes or node handles; <b>Alt+drag</b> nodes to sculpt; <b>arrow</b> keys to move nodes, <b>&lt; &gt;</b> to scale, <b>[ ]</b> to rotate");
gchar const *when_selected_one = _("<b>Drag</b> the node or its handles; <b>arrow</b> keys to move the node");
gint total_nodes = sp_nodepath_get_node_count(nodepath);
gint selected_nodes = sp_nodepath_selection_get_node_count(nodepath);
gint total_subpaths = sp_nodepath_get_subpath_count(nodepath);
gint selected_subpaths = sp_nodepath_selection_get_subpath_count(nodepath);
SPDesktop *desktop = NULL;
if (nodepath) {
desktop = nodepath->desktop;
} else {
desktop = SP_ACTIVE_DESKTOP; // when this is eliminated also remove #include "inkscape.h" above
}
SPEventContext *ec = desktop->event_context;
if (!ec) return;
Inkscape::MessageContext *mc = get_message_context(ec);
if (!mc) return;
inkscape_active_desktop()->emitToolSubselectionChanged(NULL);
if (selected_nodes == 0) {
Inkscape::Selection *sel = desktop->selection;
if (!sel || sel->isEmpty()) {
mc->setF(Inkscape::NORMAL_MESSAGE,
_("Select a single object to edit its nodes or handles."));
} else {
if (nodepath) {
mc->setF(Inkscape::NORMAL_MESSAGE,
ngettext("<b>0</b> out of <b>%i</b> node selected. <b>Click</b>, <b>Shift+click</b>, or <b>drag around</b> nodes to select.",
"<b>0</b> out of <b>%i</b> nodes selected. <b>Click</b>, <b>Shift+click</b>, or <b>drag around</b> nodes to select.",
total_nodes),
total_nodes);
} else {
if (g_slist_length((GSList *)sel->itemList()) == 1) {
mc->setF(Inkscape::NORMAL_MESSAGE, _("Drag the handles of the object to modify it."));
} else {
mc->setF(Inkscape::NORMAL_MESSAGE, _("Select a single object to edit its nodes or handles."));
}
}
}
} else if (nodepath && selected_nodes == 1) {
mc->setF(Inkscape::NORMAL_MESSAGE,
ngettext("<b>%i</b> of <b>%i</b> node selected; %s. %s.",
"<b>%i</b> of <b>%i</b> nodes selected; %s. %s.",
total_nodes),
selected_nodes, total_nodes, sp_node_type_description((Inkscape::NodePath::Node *) nodepath->selected->data), when_selected_one);
} else {
if (selected_subpaths > 1) {
mc->setF(Inkscape::NORMAL_MESSAGE,
ngettext("<b>%i</b> of <b>%i</b> node selected in <b>%i</b> of <b>%i</b> subpaths. %s.",
"<b>%i</b> of <b>%i</b> nodes selected in <b>%i</b> of <b>%i</b> subpaths. %s.",
total_nodes),
selected_nodes, total_nodes, selected_subpaths, total_subpaths, when_selected);
} else {
mc->setF(Inkscape::NORMAL_MESSAGE,
ngettext("<b>%i</b> of <b>%i</b> node selected. %s.",
"<b>%i</b> of <b>%i</b> nodes selected. %s.",
total_nodes),
selected_nodes, total_nodes, when_selected);
}
}
}
/*
* returns a *copy* of the curve of that object.
*/
SPCurve* sp_nodepath_object_get_curve(SPObject *object, const gchar *key) {
if (!object)
return NULL;
SPCurve *curve = NULL;
if (SP_IS_PATH(object)) {
SPCurve *curve_new = sp_path_get_curve_for_edit(SP_PATH(object));
curve = curve_new->copy();
} else if ( IS_LIVEPATHEFFECT(object) && key) {
const gchar *svgd = object->repr->attribute(key);
if (svgd) {
Geom::PathVector pv = sp_svg_read_pathv(svgd);
SPCurve *curve_new = new SPCurve(pv);
if (curve_new) {
curve = curve_new; // don't do curve_copy because curve_new is already only created for us!
}
}
}
return curve;
}
void sp_nodepath_set_curve (Inkscape::NodePath::Path *np, SPCurve *curve) {
if (!np || !np->object || !curve)
return;
if (SP_IS_PATH(np->object)) {
if (sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(np->object))) {
sp_path_set_original_curve(SP_PATH(np->object), curve, true, false);
} else {
sp_shape_set_curve(SP_SHAPE(np->object), curve, true);
}
} else if ( IS_LIVEPATHEFFECT(np->object) ) {
Inkscape::LivePathEffect::Effect * lpe = LIVEPATHEFFECT(np->object)->get_lpe();
if (lpe) {
Inkscape::LivePathEffect::PathParam *pathparam = dynamic_cast<Inkscape::LivePathEffect::PathParam *>( lpe->getParameter(np->repr_key) );
if (pathparam) {
pathparam->set_new_value(np->curve->get_pathvector(), false); // do not write to SVG
np->object->requestModified(SP_OBJECT_MODIFIED_FLAG);
}
}
}
}
/*
SPCanvasItem *
sp_nodepath_path_to_canvasitem(Inkscape::NodePath::Path *np, SPPath *path) {
return sp_nodepath_make_helper_item(np, sp_path_get_curve_for_edit(path));
}
*/
/// \todo this code to generate a helper canvasitem from an spcurve should be moved to different file
SPCanvasItem *
sp_nodepath_generate_helperpath(SPDesktop *desktop, SPCurve *curve, const Geom::Matrix & i2d, guint32 color = 0xff0000ff) {
SPCurve *flash_curve = curve->copy();
flash_curve->transform(i2d);
SPCanvasItem * canvasitem = sp_canvas_bpath_new(sp_desktop_tempgroup(desktop), flash_curve);
// would be nice if its color could be XORed or something, now it is invisible for red stroked objects...
// unless we also flash the nodes...
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(canvasitem), color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(canvasitem), 0, SP_WIND_RULE_NONZERO);
sp_canvas_item_show(canvasitem);
flash_curve->unref();
return canvasitem;
}
SPCanvasItem *
sp_nodepath_generate_helperpath(SPDesktop *desktop, SPItem *item) {
if (!item || !desktop) {
return NULL;
}
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
guint32 color = prefs->getInt("/tools/nodes/highlight_color", 0xff0000ff);
Geom::Matrix i2d = sp_item_i2d_affine(item);
SPCurve *curve = NULL;
if (SP_IS_PATH(item)) {
curve = sp_path_get_curve_for_edit(SP_PATH(item));
} else if ( SP_IS_SHAPE(item) && SP_SHAPE(item)->curve ) {
curve = sp_shape_get_curve (SP_SHAPE(item));
} else if ( SP_IS_TEXT(item) ) {
// do not display helperpath for text - we cannot do anything with it in Node tool anyway
// curve = SP_TEXT(item)->getNormalizedBpath();
return NULL;
} else {
g_warning ("-----> sp_nodepath_generate_helperpath(SPDesktop *desktop, SPItem *item): TODO: generate the helper path for this item type!\n");
return NULL;
}
SPCanvasItem * helperpath = sp_nodepath_generate_helperpath(desktop, curve, i2d, color);
curve->unref();
return helperpath;
}
// TODO: Merge this with sp_nodepath_make_helper_item()!
void sp_nodepath_show_helperpath(Inkscape::NodePath::Path *np, bool show) {
np->show_helperpath = show;
if (show) {
SPCurve *helper_curve = np->curve->copy();
helper_curve->transform(np->i2d);
if (!np->helper_path) {
//np->helper_path = sp_nodepath_make_helper_item(np, desktop, helper_curve, true); // Caution: this applies the transform np->i2d twice!!
np->helper_path = sp_canvas_bpath_new(sp_desktop_controls(np->desktop), helper_curve);
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(np->helper_path), np->helperpath_rgba, np->helperpath_width, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(np->helper_path), 0, SP_WIND_RULE_NONZERO);
sp_canvas_item_move_to_z(np->helper_path, 0);
sp_canvas_item_show(np->helper_path);
} else {
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(np->helper_path), helper_curve);
}
helper_curve->unref();
} else {
if (np->helper_path) {
GtkObject *temp = np->helper_path;
np->helper_path = NULL;
gtk_object_destroy(temp);
}
}
}
/* sp_nodepath_make_straight_path:
* Prevents user from curving the path by dragging a segment or activating handles etc.
* The resulting path is a linear interpolation between nodal points, with only straight segments.
* !!! this function does not work completely yet: it does not actively straighten the path, only prevents the path from being curved
*/
void sp_nodepath_make_straight_path(Inkscape::NodePath::Path *np) {
np->straight_path = true;
np->show_handles = false;
g_message("add code to make the path straight.");
// do sp_nodepath_convert_node_type on all nodes?
// coding tip: search for this text : "Make selected segments lines"
}
/*
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 :