src/splivarot.cpp

   1 #define __SP_LIVAROT_C__
   2 /*
   3  *  splivarot.cpp
   4  *  Inkscape
   5  *
   6  *  Created by fred on Fri Dec 05 2003.
   7  *  tweaked endlessly by bulia byak <buliabyak@users.sf.net>
   8  *  public domain
   9  *
  10  */
  11
  12 /*
  13  * contains lots of stitched pieces of path-chemistry.c
  14  */
  15
  16 #ifdef HAVE_CONFIG_H
  17 # include <config.h>
  18 #endif
  19
  20 #include <cstring>
  21 #include <string>
  22 #include <vector>
  23 #include <glib/gmem.h>
  24 #include "xml/repr.h"
  25 #include "svg/svg.h"
  26 #include "sp-path.h"
  27 #include "sp-shape.h"
  28 #include "sp-image.h"
  29 #include "marker.h"
  30 #include "enums.h"
  31 #include "sp-text.h"
  32 #include "sp-flowtext.h"
  33 #include "text-editing.h"
  34 #include "sp-item-group.h"
  35 #include "style.h"
  36 #include "document.h"
  37 #include "message-stack.h"
  38 #include "selection.h"
  39 #include "desktop-handles.h"
  40 #include "desktop.h"
  41 #include "display/canvas-bpath.h"
  42 #include "display/curve.h"
  43 #include <glibmm/i18n.h>
  44 #include "preferences.h"
  45
  46 #include "xml/repr.h"
  47 #include "xml/repr-sorting.h"
  48 #include <2geom/pathvector.h>
  49 #include <libnr/nr-scale-matrix-ops.h>
  50 #include "helper/geom.h"
  51
  52 #include "livarot/Path.h"
  53 #include "livarot/Shape.h"
  54
  55 #include "splivarot.h"
  56
  57 bool   Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who);
  58
  59 void sp_selected_path_boolop(SPDesktop *desktop, bool_op bop, const unsigned int verb=SP_VERB_NONE, const Glib::ustring description="");
  60 void sp_selected_path_do_offset(SPDesktop *desktop, bool expand, double prefOffset);
  61 void sp_selected_path_create_offset_object(SPDesktop *desktop, int expand, bool updating);
  62
  63 void
  64 sp_selected_path_union(SPDesktop *desktop)
  65 {
  66     sp_selected_path_boolop(desktop, bool_op_union, SP_VERB_SELECTION_UNION, _("Union"));
  67 }
  68
  69 void
  70 sp_selected_path_union_skip_undo(SPDesktop *desktop)
  71 {
  72     sp_selected_path_boolop(desktop, bool_op_union, SP_VERB_NONE, _("Union"));
  73 }
  74
  75 void
  76 sp_selected_path_intersect(SPDesktop *desktop)
  77 {
  78     sp_selected_path_boolop(desktop, bool_op_inters, SP_VERB_SELECTION_INTERSECT, _("Intersection"));
  79 }
  80
  81 void
  82 sp_selected_path_diff(SPDesktop *desktop)
  83 {
  84     sp_selected_path_boolop(desktop, bool_op_diff, SP_VERB_SELECTION_DIFF, _("Difference"));
  85 }
  86
  87 void
  88 sp_selected_path_diff_skip_undo(SPDesktop *desktop)
  89 {
  90     sp_selected_path_boolop(desktop, bool_op_diff, SP_VERB_NONE, _("Difference"));
  91 }
  92
  93 void
  94 sp_selected_path_symdiff(SPDesktop *desktop)
  95 {
  96     sp_selected_path_boolop(desktop, bool_op_symdiff, SP_VERB_SELECTION_SYMDIFF, _("Exclusion"));
  97 }
  98 void
  99 sp_selected_path_cut(SPDesktop *desktop)
 100 {
 101     sp_selected_path_boolop(desktop, bool_op_cut, SP_VERB_SELECTION_CUT, _("Division"));
 102 }
 103 void
 104 sp_selected_path_slice(SPDesktop *desktop)
 105 {
 106     sp_selected_path_boolop(desktop, bool_op_slice, SP_VERB_SELECTION_SLICE,  _("Cut path"));
 107 }
 108
 109
 110 // boolean operations
 111 // take the source paths from the file, do the operation, delete the originals and add the results
 112 void
 113 sp_selected_path_boolop(SPDesktop *desktop, bool_op bop, const unsigned int verb, const Glib::ustring description)
 114 {
 115     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 116
 117     GSList *il = (GSList *) selection->itemList();
 118
 119     // allow union on a single object for the purpose of removing self overlapse (svn log, revision 13334)
 120     if ( (g_slist_length(il) < 2) && (bop != bool_op_union)) {
 121         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 2 paths</b> to perform a boolean operation."));
 122         return;
 123     }
 124     else if ( g_slist_length(il) < 1 ) {
 125         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 1 path</b> to perform a boolean union."));
 126         return;
 127     }
 128
 129     if (g_slist_length(il) > 2) {
 130         if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 131             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>exactly 2 paths</b> to perform difference, XOR, division, or path cut."));
 132             return;
 133         }
 134     }
 135
 136     // reverseOrderForOp marks whether the order of the list is the top->down order
 137     // it's only used when there are 2 objects, and for operations who need to know the
 138     // topmost object (differences, cuts)
 139     bool reverseOrderForOp = false;
 140
 141     // mettre les elements de la liste dans l'ordre pour ces operations
 142     if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice) {
 143         // check in the tree to find which element of the selection list is topmost (for 2-operand commands only)
 144         Inkscape::XML::Node *a = SP_OBJECT_REPR(il->data);
 145         Inkscape::XML::Node *b = SP_OBJECT_REPR(il->next->data);
 146
 147         if (a == NULL || b == NULL) {
 148             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Unable to determine the <b>z-order</b> of the objects selected for difference, XOR, division, or path cut."));
 149             return;
 150         }
 151
 152         if (Ancetre(a, b)) {
 153             // a is the parent of b, already in the proper order
 154         } else if (Ancetre(b, a)) {
 155             // reverse order
 156             reverseOrderForOp = true;
 157         } else {
 158
 159             // objects are not in parent/child relationship;
 160             // find their lowest common ancestor
 161             Inkscape::XML::Node *dad = LCA(a, b);
 162             if (dad == NULL) {
 163                 desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Unable to determine the <b>z-order</b> of the objects selected for difference, XOR, division, or path cut."));
 164                 return;
 165             }
 166
 167             // find the children of the LCA that lead from it to the a and b
 168             Inkscape::XML::Node *as = AncetreFils(a, dad);
 169             Inkscape::XML::Node *bs = AncetreFils(b, dad);
 170
 171             // find out which comes first
 172             for (Inkscape::XML::Node *child = dad->firstChild(); child; child = child->next()) {
 173                 if (child == as) {
 174                     /* a first, so reverse. */
 175                     reverseOrderForOp = true;
 176                     break;
 177                 }
 178                 if (child == bs)
 179                     break;
 180             }
 181         }
 182     }
 183
 184     il = g_slist_copy(il);
 185
 186     // first check if all the input objects have shapes
 187     // otherwise bail out
 188     for (GSList *l = il; l != NULL; l = l->next)
 189     {
 190         SPItem *item = SP_ITEM(l->data);
 191         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item) && !SP_IS_FLOWTEXT(item))
 192         {
 193             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("One of the objects is <b>not a path</b>, cannot perform boolean operation."));
 194             g_slist_free(il);
 195             return;
 196         }
 197     }
 198
 199     // extract the livarot Paths from the source objects
 200     // also get the winding rule specified in the style
 201     int nbOriginaux = g_slist_length(il);
 202     std::vector<Path *> originaux(nbOriginaux);
 203     std::vector<FillRule> origWind(nbOriginaux);
 204     int curOrig;
 205     {
 206         curOrig = 0;
 207         for (GSList *l = il; l != NULL; l = l->next)
 208         {
 209             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(il->data), "style");
 210             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 211             if (val && strcmp(val, "nonzero") == 0) {
 212                 origWind[curOrig]= fill_nonZero;
 213             } else if (val && strcmp(val, "evenodd") == 0) {
 214                 origWind[curOrig]= fill_oddEven;
 215             } else {
 216                 origWind[curOrig]= fill_nonZero;
 217             }
 218
 219             originaux[curOrig] = Path_for_item((SPItem *) l->data, true, true);
 220             if (originaux[curOrig] == NULL || originaux[curOrig]->descr_cmd.size() <= 1)
 221             {
 222                 for (int i = curOrig; i >= 0; i--) delete originaux[i];
 223                 g_slist_free(il);
 224                 return;
 225             }
 226             curOrig++;
 227         }
 228     }
 229     // reverse if needed
 230     // note that the selection list keeps its order
 231     if ( reverseOrderForOp ) {
 232         Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 233         FillRule swai=origWind[0]; origWind[0]=origWind[1]; origWind[1]=swai;
 234     }
 235
 236     // and work
 237     // some temporary instances, first
 238     Shape *theShapeA = new Shape;
 239     Shape *theShapeB = new Shape;
 240     Shape *theShape = new Shape;
 241     Path *res = new Path;
 242     res->SetBackData(false);
 243     Path::cut_position  *toCut=NULL;
 244     int                  nbToCut=0;
 245
 246     if ( bop == bool_op_inters || bop == bool_op_union || bop == bool_op_diff || bop == bool_op_symdiff ) {
 247         // true boolean op
 248         // get the polygons of each path, with the winding rule specified, and apply the operation iteratively
 249         originaux[0]->ConvertWithBackData(0.1);
 250
 251         originaux[0]->Fill(theShape, 0);
 252
 253         theShapeA->ConvertToShape(theShape, origWind[0]);
 254
 255         curOrig = 1;
 256         for (GSList *l = il->next; l != NULL; l = l->next) {
 257             originaux[curOrig]->ConvertWithBackData(0.1);
 258
 259             originaux[curOrig]->Fill(theShape, curOrig);
 260
 261             theShapeB->ConvertToShape(theShape, origWind[curOrig]);
 262
 263             // les elements arrivent en ordre inverse dans la liste
 264             theShape->Booleen(theShapeB, theShapeA, bop);
 265
 266             {
 267                 Shape *swap = theShape;
 268                 theShape = theShapeA;
 269                 theShapeA = swap;
 270             }
 271             curOrig++;
 272         }
 273
 274         {
 275             Shape *swap = theShape;
 276             theShape = theShapeA;
 277             theShapeA = swap;
 278         }
 279
 280     } else if ( bop == bool_op_cut ) {
 281         // cuts= sort of a bastard boolean operation, thus not the axact same modus operandi
 282         // technically, the cut path is not necessarily a polygon (thus has no winding rule)
 283         // it is just uncrossed, and cleaned from duplicate edges and points
 284         // then it's fed to Booleen() which will uncross it against the other path
 285         // then comes the trick: each edge of the cut path is duplicated (one in each direction),
 286         // thus making a polygon. the weight of the edges of the cut are all 0, but
 287         // the Booleen need to invert the ones inside the source polygon (for the subsequent
 288         // ConvertToForme)
 289
 290         // the cut path needs to have the highest pathID in the back data
 291         // that's how the Booleen() function knows it's an edge of the cut
 292
 293         // FIXME: this gives poor results, the final paths are full of extraneous nodes. Decreasing
 294         // ConvertWithBackData parameter below simply increases the number of nodes, so for now I
 295         // left it at 1.0. Investigate replacing this by a combination of difference and
 296         // intersection of the same two paths. -- bb
 297         {
 298             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 299             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 300         }
 301         originaux[0]->ConvertWithBackData(1.0);
 302
 303         originaux[0]->Fill(theShape, 0);
 304
 305         theShapeA->ConvertToShape(theShape, origWind[0]);
 306
 307         originaux[1]->ConvertWithBackData(1.0);
 308
 309         originaux[1]->Fill(theShape, 1,false,false,false); //do not closeIfNeeded
 310
 311         theShapeB->ConvertToShape(theShape, fill_justDont); // fill_justDont doesn't computes winding numbers
 312
 313         // les elements arrivent en ordre inverse dans la liste
 314         theShape->Booleen(theShapeB, theShapeA, bool_op_cut, 1);
 315
 316     } else if ( bop == bool_op_slice ) {
 317         // slice is not really a boolean operation
 318         // you just put the 2 shapes in a single polygon, uncross it
 319         // the points where the degree is > 2 are intersections
 320         // just check it's an intersection on the path you want to cut, and keep it
 321         // the intersections you have found are then fed to ConvertPositionsToMoveTo() which will
 322         // make new subpath at each one of these positions
 323         // inversion pour l'op\8eration
 324         {
 325             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 326             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 327         }
 328         originaux[0]->ConvertWithBackData(1.0);
 329
 330         originaux[0]->Fill(theShapeA, 0,false,false,false); // don't closeIfNeeded
 331
 332         originaux[1]->ConvertWithBackData(1.0);
 333
 334         originaux[1]->Fill(theShapeA, 1,true,false,false);// don't closeIfNeeded and just dump in the shape, don't reset it
 335
 336         theShape->ConvertToShape(theShapeA, fill_justDont);
 337
 338         if ( theShape->hasBackData() ) {
 339             // should always be the case, but ya never know
 340             {
 341                 for (int i = 0; i < theShape->numberOfPoints(); i++) {
 342                     if ( theShape->getPoint(i).totalDegree() > 2 ) {
 343                         // possibly an intersection
 344                         // we need to check that at least one edge from the source path is incident to it
 345                         // before we declare it's an intersection
 346                         int cb = theShape->getPoint(i).incidentEdge[FIRST];
 347                         int   nbOrig=0;
 348                         int   nbOther=0;
 349                         int   piece=-1;
 350                         float t=0.0;
 351                         while ( cb >= 0 && cb < theShape->numberOfEdges() ) {
 352                             if ( theShape->ebData[cb].pathID == 0 ) {
 353                                 // the source has an edge incident to the point, get its position on the path
 354                                 piece=theShape->ebData[cb].pieceID;
 355                                 if ( theShape->getEdge(cb).st == i ) {
 356                                     t=theShape->ebData[cb].tSt;
 357                                 } else {
 358                                     t=theShape->ebData[cb].tEn;
 359                                 }
 360                                 nbOrig++;
 361                             }
 362                             if ( theShape->ebData[cb].pathID == 1 ) nbOther++; // the cut is incident to this point
 363                             cb=theShape->NextAt(i, cb);
 364                         }
 365                         if ( nbOrig > 0 && nbOther > 0 ) {
 366                             // point incident to both path and cut: an intersection
 367                             // note that you only keep one position on the source; you could have degenerate
 368                             // cases where the source crosses itself at this point, and you wouyld miss an intersection
 369                             toCut=(Path::cut_position*)realloc(toCut, (nbToCut+1)*sizeof(Path::cut_position));
 370                             toCut[nbToCut].piece=piece;
 371                             toCut[nbToCut].t=t;
 372                             nbToCut++;
 373                         }
 374                     }
 375                 }
 376             }
 377             {
 378                 // i think it's useless now
 379                 int i = theShape->numberOfEdges() - 1;
 380                 for (;i>=0;i--) {
 381                     if ( theShape->ebData[i].pathID == 1 ) {
 382                         theShape->SubEdge(i);
 383                     }
 384                 }
 385             }
 386
 387         }
 388     }
 389
 390     int*    nesting=NULL;
 391     int*    conts=NULL;
 392     int     nbNest=0;
 393     // pour compenser le swap juste avant
 394     if ( bop == bool_op_slice ) {
 395 //    theShape->ConvertToForme(res, nbOriginaux, originaux, true);
 396 //    res->ConvertForcedToMoveTo();
 397         res->Copy(originaux[0]);
 398         res->ConvertPositionsToMoveTo(nbToCut, toCut); // cut where you found intersections
 399         free(toCut);
 400     } else if ( bop == bool_op_cut ) {
 401         // il faut appeler pour desallouer PointData (pas vital, mais bon)
 402         // the Booleen() function did not deallocated the point_data array in theShape, because this
 403         // function needs it.
 404         // this function uses the point_data to get the winding number of each path (ie: is a hole or not)
 405         // for later reconstruction in objects, you also need to extract which path is parent of holes (nesting info)
 406         theShape->ConvertToFormeNested(res, nbOriginaux, &originaux[0], 1, nbNest, nesting, conts);
 407     } else {
 408         theShape->ConvertToForme(res, nbOriginaux, &originaux[0]);
 409     }
 410
 411     delete theShape;
 412     delete theShapeA;
 413     delete theShapeB;
 414     for (int i = 0; i < nbOriginaux; i++)  delete originaux[i];
 415
 416     if (res->descr_cmd.size() <= 1)
 417     {
 418         // only one command, presumably a moveto: it isn't a path
 419         for (GSList *l = il; l != NULL; l = l->next)
 420         {
 421             SP_OBJECT(l->data)->deleteObject();
 422         }
 423         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 424                          description);
 425         selection->clear();
 426
 427         delete res;
 428         g_slist_free(il);
 429         return;
 430     }
 431
 432     // get the source path object
 433     SPObject *source;
 434     if ( bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 435         if (reverseOrderForOp) {
 436              source = SP_OBJECT(il->data);
 437         } else {
 438              source = SP_OBJECT(il->next->data);
 439         }
 440     } else {
 441         // find out the bottom object
 442         GSList *sorted = g_slist_copy((GSList *) selection->reprList());
 443
 444         sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
 445
 446         source = sp_desktop_document(desktop)->
 447             getObjectByRepr((Inkscape::XML::Node *)sorted->data);
 448
 449         g_slist_free(sorted);
 450     }
 451
 452     // adjust style properties that depend on a possible transform in the source object in order
 453     // to get a correct style attribute for the new path
 454     SPItem* item_source = SP_ITEM(source);
 455     Geom::Matrix i2doc(sp_item_i2doc_affine(item_source));
 456     sp_item_adjust_stroke(item_source, i2doc.descrim());
 457     sp_item_adjust_pattern(item_source, i2doc);
 458     sp_item_adjust_gradient(item_source, i2doc);
 459     sp_item_adjust_livepatheffect(item_source, i2doc);
 460
 461     Inkscape::XML::Node *repr_source = SP_OBJECT_REPR(source);
 462
 463     // remember important aspects of the source path, to be restored
 464     gint pos = repr_source->position();
 465     Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
 466     gchar const *id = repr_source->attribute("id");
 467     gchar const *style = repr_source->attribute("style");
 468     gchar const *mask = repr_source->attribute("mask");
 469     gchar const *clip_path = repr_source->attribute("clip-path");
 470     gchar *title = source->title();
 471     gchar *desc = source->desc();
 472     // remove source paths
 473     selection->clear();
 474     for (GSList *l = il; l != NULL; l = l->next) {
 475         // if this is the bottommost object,
 476         if (!strcmp(SP_OBJECT_REPR(l->data)->attribute("id"), id)) {
 477             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 478             SP_OBJECT(l->data)->deleteObject(false);
 479         } else {
 480             // delete the object for real, so that its clones can take appropriate action
 481             SP_OBJECT(l->data)->deleteObject();
 482         }
 483     }
 484     g_slist_free(il);
 485
 486     // premultiply by the inverse of parent's repr
 487     SPItem *parent_item = SP_ITEM(sp_desktop_document(desktop)->getObjectByRepr(parent));
 488     Geom::Matrix local (sp_item_i2doc_affine(parent_item));
 489     gchar *transform = sp_svg_transform_write(local.inverse());
 490
 491     // now that we have the result, add it on the canvas
 492     if ( bop == bool_op_cut || bop == bool_op_slice ) {
 493         int    nbRP=0;
 494         Path** resPath;
 495         if ( bop == bool_op_slice ) {
 496             // there are moveto's at each intersection, but it's still one unique path
 497             // so break it down and add each subpath independently
 498             // we could call break_apart to do this, but while we have the description...
 499             resPath=res->SubPaths(nbRP, false);
 500         } else {
 501             // cut operation is a bit wicked: you need to keep holes
 502             // that's why you needed the nesting
 503             // ConvertToFormeNested() dumped all the subpath in a single Path "res", so we need
 504             // to get the path for each part of the polygon. that's why you need the nesting info:
 505             // to know in wich subpath to add a subpath
 506             resPath=res->SubPathsWithNesting(nbRP, true, nbNest, nesting, conts);
 507
 508             // cleaning
 509             if ( conts ) free(conts);
 510             if ( nesting ) free(nesting);
 511         }
 512
 513         // add all the pieces resulting from cut or slice
 514         for (int i=0;i<nbRP;i++) {
 515             gchar *d = resPath[i]->svg_dump_path();
 516
 517             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 518             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 519             repr->setAttribute("style", style);
 520             if (mask)
 521                 repr->setAttribute("mask", mask);
 522             if (clip_path)
 523                 repr->setAttribute("clip-path", clip_path);
 524
 525             repr->setAttribute("d", d);
 526             g_free(d);
 527
 528             // for slice, remove fill
 529             if (bop == bool_op_slice) {
 530                 SPCSSAttr *css;
 531
 532                 css = sp_repr_css_attr_new();
 533                 sp_repr_css_set_property(css, "fill", "none");
 534
 535                 sp_repr_css_change(repr, css, "style");
 536
 537                 sp_repr_css_attr_unref(css);
 538             }
 539
 540             // we assign the same id on all pieces, but it on adding to document, it will be changed on all except one
 541             // this means it's basically random which of the pieces inherits the original's id and clones
 542             // a better algorithm might figure out e.g. the biggest piece
 543             repr->setAttribute("id", id);
 544
 545             repr->setAttribute("transform", transform);
 546
 547             // add the new repr to the parent
 548             parent->appendChild(repr);
 549
 550             // move to the saved position
 551             repr->setPosition(pos > 0 ? pos : 0);
 552
 553             selection->add(repr);
 554             Inkscape::GC::release(repr);
 555
 556             delete resPath[i];
 557         }
 558         if ( resPath ) free(resPath);
 559
 560     } else {
 561         gchar *d = res->svg_dump_path();
 562
 563         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 564         Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 565         repr->setAttribute("style", style);
 566
 567         if ( mask )
 568             repr->setAttribute("mask", mask);
 569
 570         if ( clip_path )
 571             repr->setAttribute("clip-path", clip_path);
 572
 573         repr->setAttribute("d", d);
 574         g_free(d);
 575
 576         repr->setAttribute("transform", transform);
 577
 578         repr->setAttribute("id", id);
 579         parent->appendChild(repr);
 580         if (title) {
 581                 sp_desktop_document(desktop)->getObjectByRepr(repr)->setTitle(title);
 582         }
 583         if (desc) {
 584                 sp_desktop_document(desktop)->getObjectByRepr(repr)->setDesc(desc);
 585         }
 586                 repr->setPosition(pos > 0 ? pos : 0);
 587
 588         selection->add(repr);
 589         Inkscape::GC::release(repr);
 590     }
 591
 592     g_free(transform);
 593     if (title) g_free(title);
 594     if (desc) g_free(desc);
 595
 596     if (verb != SP_VERB_NONE) {
 597         sp_document_done(sp_desktop_document(desktop), verb, description);
 598     }
 599
 600     delete res;
 601 }
 602
 603 static
 604 void sp_selected_path_outline_add_marker( SPObject *marker_object, Geom::Matrix marker_transform,
 605                                           Geom::Scale stroke_scale, Geom::Matrix transform,
 606                                           Inkscape::XML::Node *g_repr, Inkscape::XML::Document *xml_doc, SPDocument * doc )
 607 {
 608     SPMarker* marker = SP_MARKER (marker_object);
 609     SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker_object));
 610
 611     Geom::Matrix tr(marker_transform);
 612
 613     if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
 614         tr = stroke_scale * tr;
 615     }
 616
 617     // total marker transform
 618     tr = marker_item->transform * marker->c2p * tr * transform;
 619
 620     if (SP_OBJECT_REPR(marker_item)) {
 621         Inkscape::XML::Node *m_repr = SP_OBJECT_REPR(marker_item)->duplicate(xml_doc);
 622         g_repr->appendChild(m_repr);
 623         SPItem *marker_item = (SPItem *) doc->getObjectByRepr(m_repr);
 624         sp_item_write_transform(marker_item, m_repr, tr);
 625     }
 626 }
 627
 628 void
 629 sp_selected_path_outline(SPDesktop *desktop)
 630 {
 631     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 632
 633     if (selection->isEmpty()) {
 634         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>stroked path(s)</b> to convert stroke to path."));
 635         return;
 636     }
 637
 638     bool did = false;
 639
 640     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 641          items != NULL;
 642          items = items->next) {
 643
 644         SPItem *item = (SPItem *) items->data;
 645
 646         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 647             continue;
 648
 649         SPCurve *curve = NULL;
 650         if (SP_IS_SHAPE(item)) {
 651             curve = sp_shape_get_curve(SP_SHAPE(item));
 652             if (curve == NULL)
 653                 continue;
 654         }
 655         if (SP_IS_TEXT(item)) {
 656             curve = SP_TEXT(item)->getNormalizedBpath();
 657             if (curve == NULL)
 658                 continue;
 659         }
 660
 661         // pas de stroke pas de chocolat
 662         if (!SP_OBJECT_STYLE(item) || SP_OBJECT_STYLE(item)->stroke.noneSet) {
 663             curve->unref();
 664             continue;
 665         }
 666
 667         // remember old stroke style, to be set on fill
 668         SPStyle *i_style = SP_OBJECT_STYLE(item);
 669         SPCSSAttr *ncss;
 670         {
 671             ncss = sp_css_attr_from_style(i_style, SP_STYLE_FLAG_ALWAYS);
 672             gchar const *s_val = sp_repr_css_property(ncss, "stroke", NULL);
 673             gchar const *s_opac = sp_repr_css_property(ncss, "stroke-opacity", NULL);
 674
 675             sp_repr_css_set_property(ncss, "stroke", "none");
 676             sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
 677             sp_repr_css_set_property(ncss, "fill", s_val);
 678             if ( s_opac ) {
 679                 sp_repr_css_set_property(ncss, "fill-opacity", s_opac);
 680             } else {
 681                 sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
 682             }
 683             sp_repr_css_unset_property(ncss, "marker-start");
 684             sp_repr_css_unset_property(ncss, "marker-mid");
 685             sp_repr_css_unset_property(ncss, "marker-end");
 686         }
 687
 688         Geom::Matrix const transform(item->transform);
 689         float const scale = transform.descrim();
 690         gchar const *mask = SP_OBJECT_REPR(item)->attribute("mask");
 691         gchar const *clip_path = SP_OBJECT_REPR(item)->attribute("clip-path");
 692
 693         float o_width, o_miter;
 694         JoinType o_join;
 695         ButtType o_butt;
 696
 697         {
 698             int jointype, captype;
 699
 700             jointype = i_style->stroke_linejoin.computed;
 701             captype = i_style->stroke_linecap.computed;
 702             o_width = i_style->stroke_width.computed;
 703
 704             switch (jointype) {
 705                 case SP_STROKE_LINEJOIN_MITER:
 706                     o_join = join_pointy;
 707                     break;
 708                 case SP_STROKE_LINEJOIN_ROUND:
 709                     o_join = join_round;
 710                     break;
 711                 default:
 712                     o_join = join_straight;
 713                     break;
 714             }
 715
 716             switch (captype) {
 717                 case SP_STROKE_LINECAP_SQUARE:
 718                     o_butt = butt_square;
 719                     break;
 720                 case SP_STROKE_LINECAP_ROUND:
 721                     o_butt = butt_round;
 722                     break;
 723                 default:
 724                     o_butt = butt_straight;
 725                     break;
 726             }
 727
 728             if (o_width < 0.1)
 729                 o_width = 0.1;
 730             o_miter = i_style->stroke_miterlimit.value * o_width;
 731         }
 732
 733         SPCurve *curvetemp = curve_for_item(item);
 734         if (curvetemp == NULL) {
 735             curve->unref();
 736             continue;
 737         }
 738         // Livarots outline of arcs is broken. So convert the path to linear and cubics only, for which the outline is created correctly.
 739         Geom::PathVector pathv = pathv_to_linear_and_cubic_beziers( curvetemp->get_pathvector() );
 740         curvetemp->unref();
 741
 742         Path *orig = new Path;
 743         orig->LoadPathVector(pathv);
 744
 745         Path *res = new Path;
 746         res->SetBackData(false);
 747
 748         if (i_style->stroke_dash.n_dash) {
 749             // For dashed strokes, use Stroke method, because Outline can't do dashes
 750             // However Stroke adds lots of extra nodes _or_ makes the path crooked, so consider this a temporary workaround
 751
 752             orig->ConvertWithBackData(0.1);
 753
 754             orig->DashPolylineFromStyle(i_style, scale, 0);
 755
 756             Shape* theShape = new Shape;
 757             orig->Stroke(theShape, false, 0.5*o_width, o_join, o_butt,
 758                          0.5 * o_miter);
 759             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 760
 761             Shape *theRes = new Shape;
 762
 763             theRes->ConvertToShape(theShape, fill_positive);
 764
 765             Path *originaux[1];
 766             originaux[0] = res;
 767             theRes->ConvertToForme(orig, 1, originaux);
 768
 769             res->Coalesce(5.0);
 770
 771             delete theShape;
 772             delete theRes;
 773
 774         } else {
 775
 776             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 777
 778             orig->Coalesce(0.5 * o_width);
 779
 780             Shape *theShape = new Shape;
 781             Shape *theRes = new Shape;
 782
 783             res->ConvertWithBackData(1.0);
 784             res->Fill(theShape, 0);
 785             theRes->ConvertToShape(theShape, fill_positive);
 786
 787             Path *originaux[1];
 788             originaux[0] = res;
 789             theRes->ConvertToForme(orig, 1, originaux);
 790
 791             delete theShape;
 792             delete theRes;
 793         }
 794
 795         if (orig->descr_cmd.size() <= 1) {
 796             // ca a merd\8e, ou bien le resultat est vide
 797             delete res;
 798             delete orig;
 799             continue;
 800         }
 801
 802         did = true;
 803
 804         // remember the position of the item
 805         gint pos = SP_OBJECT_REPR(item)->position();
 806         // remember parent
 807         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 808         // remember id
 809         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 810         // remember title
 811         gchar *title = item->title();
 812         // remember description
 813         gchar *desc = item->desc();
 814
 815         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
 816
 817             SPDocument * doc = sp_desktop_document(desktop);
 818             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 819             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 820
 821             // restore old style, but set old stroke style on fill
 822             sp_repr_css_change(repr, ncss, "style");
 823
 824             sp_repr_css_attr_unref(ncss);
 825
 826             gchar *str = orig->svg_dump_path();
 827             repr->setAttribute("d", str);
 828             g_free(str);
 829
 830             if (mask)
 831                 repr->setAttribute("mask", mask);
 832             if (clip_path)
 833                 repr->setAttribute("clip-path", clip_path);
 834
 835             if (SP_IS_SHAPE(item) && sp_shape_has_markers (SP_SHAPE(item))) {
 836
 837                 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 838                 Inkscape::XML::Node *g_repr = xml_doc->createElement("svg:g");
 839
 840                 // add the group to the parent
 841                 parent->appendChild(g_repr);
 842                 // move to the saved position
 843                 g_repr->setPosition(pos > 0 ? pos : 0);
 844
 845                 g_repr->appendChild(repr);
 846                 // restore title, description, id, transform
 847                 repr->setAttribute("id", id);
 848                 SPItem *newitem = (SPItem *) doc->getObjectByRepr(repr);
 849                 sp_item_write_transform(newitem, repr, transform);
 850                 if (title) {
 851                         newitem->setTitle(title);
 852                 }
 853                 if (desc) {
 854                         newitem->setDesc(desc);
 855                 }
 856
 857                 SPShape *shape = SP_SHAPE(item);
 858
 859                 Geom::PathVector const & pathv = curve->get_pathvector();
 860                 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
 861                     for (int i = 0; i < 2; i++) {  // SP_MARKER_LOC and SP_MARKER_LOC_START
 862                         if ( SPObject *marker_obj = shape->marker[i] ) {
 863                             Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
 864                             sp_selected_path_outline_add_marker( marker_obj, m,
 865                                                                  Geom::Scale(i_style->stroke_width.computed), transform,
 866                                                                  g_repr, xml_doc, doc );
 867                         }
 868                     }
 869
 870                     for (int i = 0; i < 3; i += 2) {  // SP_MARKER_LOC and SP_MARKER_LOC_MID
 871                         SPObject *midmarker_obj = shape->marker[i];
 872                         if ( midmarker_obj && (path_it->size_default() > 1) ) {
 873                             Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
 874                             Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
 875                             while (curve_it2 != path_it->end_default())
 876                             {
 877                                 /* Put marker between curve_it1 and curve_it2.
 878                                  * Loop to end_default (so including closing segment), because when a path is closed,
 879                                  * there should be a midpoint marker between last segment and closing straight line segment
 880                                  */
 881                                 Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
 882                                 sp_selected_path_outline_add_marker(midmarker_obj, m,
 883                                                                     Geom::Scale(i_style->stroke_width.computed), transform,
 884                                                                     g_repr, xml_doc, doc);
 885
 886                                 ++curve_it1;
 887                                 ++curve_it2;
 888                             }
 889                         }
 890                     }
 891
 892                     for (int i = 0; i < 4; i += 3) {  // SP_MARKER_LOC and SP_MARKER_LOC_END
 893                         if ( SPObject *marker_obj = shape->marker[i] ) {
 894                             /* Get reference to last curve in the path.
 895                              * For moveto-only path, this returns the "closing line segment". */
 896                             unsigned int index = path_it->size_default();
 897                             if (index > 0) {
 898                                 index--;
 899                             }
 900                             Geom::Curve const &lastcurve = (*path_it)[index];
 901
 902                             Geom::Matrix const m = sp_shape_marker_get_transform_at_end(lastcurve);
 903                             sp_selected_path_outline_add_marker( marker_obj, m,
 904                                                                  Geom::Scale(i_style->stroke_width.computed), transform,
 905                                                                  g_repr, xml_doc, doc );
 906                         }
 907                     }
 908                 }
 909
 910                 selection->add(g_repr);
 911
 912                 Inkscape::GC::release(g_repr);
 913
 914
 915             } else {
 916
 917                 // add the new repr to the parent
 918                 parent->appendChild(repr);
 919
 920                 // move to the saved position
 921                 repr->setPosition(pos > 0 ? pos : 0);
 922
 923                 // restore title, description, id, transform
 924                 repr->setAttribute("id", id);
 925
 926                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 927                 sp_item_write_transform(newitem, repr, transform);
 928                 if (title) {
 929                         newitem->setTitle(title);
 930                 }
 931                 if (desc) {
 932                         newitem->setDesc(desc);
 933                 }
 934
 935                 selection->add(repr);
 936
 937             }
 938
 939             Inkscape::GC::release(repr);
 940
 941             curve->unref();
 942             selection->remove(item);
 943             SP_OBJECT(item)->deleteObject(false);
 944
 945         }
 946         if (title) g_free(title);
 947         if (desc) g_free(desc);
 948
 949         delete res;
 950         delete orig;
 951     }
 952
 953     if (did) {
 954         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_OUTLINE,
 955                          _("Convert stroke to path"));
 956     } else {
 957         // TRANSLATORS: "to outline" means "to convert stroke to path"
 958         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> in the selection."));
 959         return;
 960     }
 961 }
 962
 963
 964 void
 965 sp_selected_path_offset(SPDesktop *desktop)
 966 {
 967     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 968     double prefOffset = prefs->getDouble("/options/defaultoffsetwidth/value", 1.0);
 969
 970     sp_selected_path_do_offset(desktop, true, prefOffset);
 971 }
 972 void
 973 sp_selected_path_inset(SPDesktop *desktop)
 974 {
 975     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 976     double prefOffset = prefs->getDouble("/options/defaultoffsetwidth/value", 1.0);
 977
 978     sp_selected_path_do_offset(desktop, false, prefOffset);
 979 }
 980
 981 void
 982 sp_selected_path_offset_screen(SPDesktop *desktop, double pixels)
 983 {
 984     sp_selected_path_do_offset(desktop, true,  pixels / desktop->current_zoom());
 985 }
 986
 987 void
 988 sp_selected_path_inset_screen(SPDesktop *desktop, double pixels)
 989 {
 990     sp_selected_path_do_offset(desktop, false,  pixels / desktop->current_zoom());
 991 }
 992
 993
 994 void sp_selected_path_create_offset_object_zero(SPDesktop *desktop)
 995 {
 996     sp_selected_path_create_offset_object(desktop, 0, false);
 997 }
 998
 999 void sp_selected_path_create_offset(SPDesktop *desktop)
1000 {
1001     sp_selected_path_create_offset_object(desktop, 1, false);
1002 }
1003 void sp_selected_path_create_inset(SPDesktop *desktop)
1004 {
1005     sp_selected_path_create_offset_object(desktop, -1, false);
1006 }
1007
1008 void sp_selected_path_create_updating_offset_object_zero(SPDesktop *desktop)
1009 {
1010     sp_selected_path_create_offset_object(desktop, 0, true);
1011 }
1012
1013 void sp_selected_path_create_updating_offset(SPDesktop *desktop)
1014 {
1015     sp_selected_path_create_offset_object(desktop, 1, true);
1016 }
1017 void sp_selected_path_create_updating_inset(SPDesktop *desktop)
1018 {
1019     sp_selected_path_create_offset_object(desktop, -1, true);
1020 }
1021
1022 void
1023 sp_selected_path_create_offset_object(SPDesktop *desktop, int expand, bool updating)
1024 {
1025     Inkscape::Selection *selection;
1026     Inkscape::XML::Node *repr;
1027     SPItem *item;
1028     SPCurve *curve;
1029     gchar *style, *str;
1030     float o_width, o_miter;
1031     JoinType o_join;
1032     ButtType o_butt;
1033
1034     curve = NULL;
1035
1036     selection = sp_desktop_selection(desktop);
1037
1038     item = selection->singleItem();
1039
1040     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
1041         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
1042         return;
1043     }
1044     if (SP_IS_SHAPE(item))
1045     {
1046         curve = sp_shape_get_curve(SP_SHAPE(item));
1047         if (curve == NULL)
1048             return;
1049     }
1050     if (SP_IS_TEXT(item))
1051     {
1052         curve = SP_TEXT(item)->getNormalizedBpath();
1053         if (curve == NULL)
1054             return;
1055     }
1056
1057     Geom::Matrix const transform(item->transform);
1058
1059     sp_item_write_transform(item, SP_OBJECT_REPR(item), Geom::identity());
1060
1061     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
1062
1063     // remember the position of the item
1064     gint pos = SP_OBJECT_REPR(item)->position();
1065     // remember parent
1066     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1067
1068     {
1069         SPStyle *i_style = SP_OBJECT(item)->style;
1070         int jointype, captype;
1071
1072         jointype = i_style->stroke_linejoin.value;
1073         captype = i_style->stroke_linecap.value;
1074         o_width = i_style->stroke_width.computed;
1075         if (jointype == SP_STROKE_LINEJOIN_MITER)
1076         {
1077             o_join = join_pointy;
1078         }
1079         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
1080         {
1081             o_join = join_round;
1082         }
1083         else
1084         {
1085             o_join = join_straight;
1086         }
1087         if (captype == SP_STROKE_LINECAP_SQUARE)
1088         {
1089             o_butt = butt_square;
1090         }
1091         else if (captype == SP_STROKE_LINECAP_ROUND)
1092         {
1093             o_butt = butt_round;
1094         }
1095         else
1096         {
1097             o_butt = butt_straight;
1098         }
1099
1100         {
1101             Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1102             o_width = prefs->getDouble("/options/defaultoffsetwidth/value", 1.0);
1103         }
1104
1105         if (o_width < 0.01)
1106             o_width = 0.01;
1107         o_miter = i_style->stroke_miterlimit.value * o_width;
1108     }
1109
1110     Path *orig = Path_for_item(item, true, false);
1111     if (orig == NULL)
1112     {
1113         g_free(style);
1114         curve->unref();
1115         return;
1116     }
1117
1118     Path *res = new Path;
1119     res->SetBackData(false);
1120
1121     {
1122         Shape *theShape = new Shape;
1123         Shape *theRes = new Shape;
1124
1125         orig->ConvertWithBackData(1.0);
1126         orig->Fill(theShape, 0);
1127
1128         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1129         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1130         if (val && strcmp(val, "nonzero") == 0)
1131         {
1132             theRes->ConvertToShape(theShape, fill_nonZero);
1133         }
1134         else if (val && strcmp(val, "evenodd") == 0)
1135         {
1136             theRes->ConvertToShape(theShape, fill_oddEven);
1137         }
1138         else
1139         {
1140             theRes->ConvertToShape(theShape, fill_nonZero);
1141         }
1142
1143         Path *originaux[1];
1144         originaux[0] = orig;
1145         theRes->ConvertToForme(res, 1, originaux);
1146
1147         delete theShape;
1148         delete theRes;
1149     }
1150
1151     curve->unref();
1152
1153     if (res->descr_cmd.size() <= 1)
1154     {
1155         // pas vraiment de points sur le resultat
1156         // donc il ne reste rien
1157         sp_document_done(sp_desktop_document(desktop),
1158                          (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1159                           : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1160                          (updating ? _("Create linked offset")
1161                           : _("Create dynamic offset")));
1162         selection->clear();
1163
1164         delete res;
1165         delete orig;
1166         g_free(style);
1167         return;
1168     }
1169
1170     {
1171         gchar tstr[80];
1172
1173         tstr[79] = '\0';
1174
1175         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1176         repr = xml_doc->createElement("svg:path");
1177         repr->setAttribute("sodipodi:type", "inkscape:offset");
1178         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1179                                                           ? o_width
1180                                                           : expand < 0
1181                                                           ? -o_width
1182                                                           : 0 ));
1183
1184         str = res->svg_dump_path();
1185         repr->setAttribute("inkscape:original", str);
1186         g_free(str);
1187
1188         if ( updating ) {
1189             char const *id = SP_OBJECT(item)->repr->attribute("id");
1190             char const *uri = g_strdup_printf("#%s", id);
1191             repr->setAttribute("xlink:href", uri);
1192             g_free((void *) uri);
1193         } else {
1194             repr->setAttribute("inkscape:href", NULL);
1195         }
1196
1197         repr->setAttribute("style", style);
1198
1199         // add the new repr to the parent
1200         parent->appendChild(repr);
1201
1202         // move to the saved position
1203         repr->setPosition(pos > 0 ? pos : 0);
1204
1205         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1206
1207         if ( updating ) {
1208             // on conserve l'original
1209             // we reapply the transform to the original (offset will feel it)
1210             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1211         } else {
1212             // delete original, apply the transform to the offset
1213             SP_OBJECT(item)->deleteObject(false);
1214             sp_item_write_transform(nitem, repr, transform);
1215         }
1216
1217         // The object just created from a temporary repr is only a seed.
1218         // We need to invoke its write which will update its real repr (in particular adding d=)
1219         SP_OBJECT(nitem)->updateRepr();
1220
1221         Inkscape::GC::release(repr);
1222
1223         selection->set(nitem);
1224     }
1225
1226     sp_document_done(sp_desktop_document(desktop),
1227                      (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1228                       : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1229                      (updating ? _("Create linked offset")
1230                       : _("Create dynamic offset")));
1231
1232     delete res;
1233     delete orig;
1234
1235     g_free(style);
1236 }
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249 void
1250 sp_selected_path_do_offset(SPDesktop *desktop, bool expand, double prefOffset)
1251 {
1252     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1253
1254     if (selection->isEmpty()) {
1255         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1256         return;
1257     }
1258
1259     bool did = false;
1260
1261     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1262          items != NULL;
1263          items = items->next) {
1264
1265         SPItem *item = (SPItem *) items->data;
1266
1267         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1268             continue;
1269
1270         SPCurve *curve = NULL;
1271         if (SP_IS_SHAPE(item)) {
1272             curve = sp_shape_get_curve(SP_SHAPE(item));
1273             if (curve == NULL)
1274                 continue;
1275         }
1276         if (SP_IS_TEXT(item)) {
1277             curve = SP_TEXT(item)->getNormalizedBpath();
1278             if (curve == NULL)
1279                 continue;
1280         }
1281
1282         Geom::Matrix const transform(item->transform);
1283
1284         sp_item_write_transform(item, SP_OBJECT_REPR(item), Geom::identity());
1285
1286         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1287
1288         float o_width, o_miter;
1289         JoinType o_join;
1290         ButtType o_butt;
1291
1292         {
1293             SPStyle *i_style = SP_OBJECT(item)->style;
1294             int jointype, captype;
1295
1296             jointype = i_style->stroke_linejoin.value;
1297             captype = i_style->stroke_linecap.value;
1298             o_width = i_style->stroke_width.computed;
1299
1300             switch (jointype) {
1301                 case SP_STROKE_LINEJOIN_MITER:
1302                     o_join = join_pointy;
1303                     break;
1304                 case SP_STROKE_LINEJOIN_ROUND:
1305                     o_join = join_round;
1306                     break;
1307                 default:
1308                     o_join = join_straight;
1309                     break;
1310             }
1311
1312             switch (captype) {
1313                 case SP_STROKE_LINECAP_SQUARE:
1314                     o_butt = butt_square;
1315                     break;
1316                 case SP_STROKE_LINECAP_ROUND:
1317                     o_butt = butt_round;
1318                     break;
1319                 default:
1320                     o_butt = butt_straight;
1321                     break;
1322             }
1323
1324             o_width = prefOffset;
1325
1326             if (o_width < 0.1)
1327                 o_width = 0.1;
1328             o_miter = i_style->stroke_miterlimit.value * o_width;
1329         }
1330
1331         Path *orig = Path_for_item(item, false);
1332         if (orig == NULL) {
1333             g_free(style);
1334             curve->unref();
1335             continue;
1336         }
1337
1338         Path *res = new Path;
1339         res->SetBackData(false);
1340
1341         {
1342             Shape *theShape = new Shape;
1343             Shape *theRes = new Shape;
1344
1345             orig->ConvertWithBackData(0.03);
1346             orig->Fill(theShape, 0);
1347
1348             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1349             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1350             if (val && strcmp(val, "nonzero") == 0)
1351             {
1352                 theRes->ConvertToShape(theShape, fill_nonZero);
1353             }
1354             else if (val && strcmp(val, "evenodd") == 0)
1355             {
1356                 theRes->ConvertToShape(theShape, fill_oddEven);
1357             }
1358             else
1359             {
1360                 theRes->ConvertToShape(theShape, fill_nonZero);
1361             }
1362
1363             // et maintenant: offset
1364             // methode inexacte
1365 /*                      Path *originaux[1];
1366                         originaux[0] = orig;
1367                         theRes->ConvertToForme(res, 1, originaux);
1368
1369                         if (expand) {
1370                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1371                         } else {
1372                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1373                         }
1374
1375                         orig->ConvertWithBackData(1.0);
1376                         orig->Fill(theShape, 0);
1377                         theRes->ConvertToShape(theShape, fill_positive);
1378                         originaux[0] = orig;
1379                         theRes->ConvertToForme(res, 1, originaux);
1380
1381                         if (o_width >= 0.5) {
1382                         //     res->Coalesce(1.0);
1383                         res->ConvertEvenLines(1.0);
1384                         res->Simplify(1.0);
1385                         } else {
1386                         //      res->Coalesce(o_width);
1387                         res->ConvertEvenLines(1.0*o_width);
1388                         res->Simplify(1.0 * o_width);
1389                         }    */
1390             // methode par makeoffset
1391
1392             if (expand)
1393             {
1394                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1395             }
1396             else
1397             {
1398                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1399             }
1400             theRes->ConvertToShape(theShape, fill_positive);
1401
1402             res->Reset();
1403             theRes->ConvertToForme(res);
1404
1405             if (o_width >= 1.0)
1406             {
1407                 res->ConvertEvenLines(1.0);
1408                 res->Simplify(1.0);
1409             }
1410             else
1411             {
1412                 res->ConvertEvenLines(1.0*o_width);
1413                 res->Simplify(1.0 * o_width);
1414             }
1415
1416             delete theShape;
1417             delete theRes;
1418         }
1419
1420         did = true;
1421
1422         curve->unref();
1423         // remember the position of the item
1424         gint pos = SP_OBJECT_REPR(item)->position();
1425         // remember parent
1426         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1427         // remember id
1428         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1429
1430         selection->remove(item);
1431         SP_OBJECT(item)->deleteObject(false);
1432
1433         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1434
1435             gchar tstr[80];
1436
1437             tstr[79] = '\0';
1438
1439             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1440             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1441
1442             repr->setAttribute("style", style);
1443
1444             gchar *str = res->svg_dump_path();
1445             repr->setAttribute("d", str);
1446             g_free(str);
1447
1448             // add the new repr to the parent
1449             parent->appendChild(repr);
1450
1451             // move to the saved position
1452             repr->setPosition(pos > 0 ? pos : 0);
1453
1454             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1455
1456             // reapply the transform
1457             sp_item_write_transform(newitem, repr, transform);
1458
1459             repr->setAttribute("id", id);
1460
1461             selection->add(repr);
1462
1463             Inkscape::GC::release(repr);
1464         }
1465
1466         delete orig;
1467         delete res;
1468     }
1469
1470     if (did) {
1471         sp_document_done(sp_desktop_document(desktop),
1472                          (expand ? SP_VERB_SELECTION_OFFSET : SP_VERB_SELECTION_INSET),
1473                          (expand ? _("Outset path") : _("Inset path")));
1474     } else {
1475         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1476         return;
1477     }
1478 }
1479
1480
1481 static bool
1482 sp_selected_path_simplify_items(SPDesktop *desktop,
1483                                 Inkscape::Selection *selection, GSList *items,
1484                                 float threshold,  bool justCoalesce,
1485                                 float angleLimit, bool breakableAngles,
1486                                 bool modifySelection);
1487
1488
1489 //return true if we changed something, else false
1490 bool
1491 sp_selected_path_simplify_item(SPDesktop *desktop,
1492                  Inkscape::Selection *selection, SPItem *item,
1493                  float threshold,  bool justCoalesce,
1494                  float angleLimit, bool breakableAngles,
1495                  gdouble size,     bool modifySelection)
1496 {
1497     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1498         return false;
1499
1500     //If this is a group, do the children instead
1501     if (SP_IS_GROUP(item)) {
1502         GSList *items = sp_item_group_item_list(SP_GROUP(item));
1503
1504         return sp_selected_path_simplify_items(desktop, selection, items,
1505                                                threshold, justCoalesce,
1506                                                angleLimit, breakableAngles,
1507                                                false);
1508     }
1509
1510
1511     SPCurve *curve = NULL;
1512
1513     if (SP_IS_SHAPE(item)) {
1514         curve = sp_shape_get_curve(SP_SHAPE(item));
1515         if (!curve)
1516             return false;
1517     }
1518
1519     if (SP_IS_TEXT(item)) {
1520         curve = SP_TEXT(item)->getNormalizedBpath();
1521         if (!curve)
1522             return false;
1523     }
1524
1525     // correct virtual size by full transform (bug #166937)
1526     size /= sp_item_i2doc_affine(item).descrim();
1527
1528     // save the transform, to re-apply it after simplification
1529     Geom::Matrix const transform(item->transform);
1530
1531     /*
1532        reset the transform, effectively transforming the item by transform.inverse();
1533        this is necessary so that the item is transformed twice back and forth,
1534        allowing all compensations to cancel out regardless of the preferences
1535     */
1536     sp_item_write_transform(item, SP_OBJECT_REPR(item), Geom::identity());
1537
1538     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1539     gchar *mask = g_strdup(SP_OBJECT_REPR(item)->attribute("mask"));
1540     gchar *clip_path = g_strdup(SP_OBJECT_REPR(item)->attribute("clip-path"));
1541
1542     Path *orig = Path_for_item(item, false);
1543     if (orig == NULL) {
1544         g_free(style);
1545         curve->unref();
1546         return false;
1547     }
1548
1549     curve->unref();
1550     // remember the position of the item
1551     gint pos = SP_OBJECT_REPR(item)->position();
1552     // remember parent
1553     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1554     // remember id
1555     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1556     // remember path effect
1557     char const *patheffect = SP_OBJECT_REPR(item)->attribute("inkscape:path-effect");
1558     // remember title
1559     gchar *title = item->title();
1560     // remember description
1561     gchar *desc = item->desc();
1562
1563     //If a group was selected, to not change the selection list
1564     if (modifySelection)
1565         selection->remove(item);
1566
1567     SP_OBJECT(item)->deleteObject(false);
1568
1569     if ( justCoalesce ) {
1570         orig->Coalesce(threshold * size);
1571     } else {
1572         orig->ConvertEvenLines(threshold * size);
1573         orig->Simplify(threshold * size);
1574     }
1575
1576     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1577     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1578
1579     // restore style, mask and clip-path
1580     repr->setAttribute("style", style);
1581     g_free(style);
1582
1583     if ( mask ) {
1584         repr->setAttribute("mask", mask);
1585         g_free(mask);
1586     }
1587
1588     if ( clip_path ) {
1589         repr->setAttribute("clip-path", clip_path);
1590         g_free(clip_path);
1591     }
1592
1593     // path
1594     gchar *str = orig->svg_dump_path();
1595     if (patheffect)
1596         repr->setAttribute("inkscape:original-d", str);
1597     else
1598         repr->setAttribute("d", str);
1599     g_free(str);
1600
1601     // restore id
1602     repr->setAttribute("id", id);
1603
1604     // add the new repr to the parent
1605     parent->appendChild(repr);
1606
1607     // move to the saved position
1608     repr->setPosition(pos > 0 ? pos : 0);
1609
1610     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1611
1612     // reapply the transform
1613     sp_item_write_transform(newitem, repr, transform);
1614
1615     // restore path effect
1616     repr->setAttribute("inkscape:path-effect", patheffect);
1617
1618     // restore title & description
1619     if (title) {
1620         newitem->setTitle(title);
1621         g_free(title);
1622     }
1623     if (desc) {
1624         newitem->setDesc(desc);
1625         g_free(desc);
1626     }
1627
1628     //If we are not in a selected group
1629     if (modifySelection)
1630         selection->add(repr);
1631
1632     Inkscape::GC::release(repr);
1633
1634     // clean up
1635     if (orig) delete orig;
1636
1637     return true;
1638 }
1639
1640
1641 bool
1642 sp_selected_path_simplify_items(SPDesktop *desktop,
1643                                 Inkscape::Selection *selection, GSList *items,
1644                                 float threshold,  bool justCoalesce,
1645                                 float angleLimit, bool breakableAngles,
1646                                 bool modifySelection)
1647 {
1648     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1649     bool simplifyIndividualPaths = prefs->getBool("/options/simplifyindividualpaths/value");
1650
1651     gchar *simplificationType;
1652     if (simplifyIndividualPaths) {
1653         simplificationType = _("Simplifying paths (separately):");
1654     } else {
1655         simplificationType = _("Simplifying paths:");
1656     }
1657
1658     bool didSomething = false;
1659
1660     Geom::OptRect selectionBbox = selection->bounds();
1661     if (!selectionBbox) {
1662         return false;
1663     }
1664     gdouble selectionSize  = L2(selectionBbox->dimensions());
1665
1666     gdouble simplifySize  = selectionSize;
1667
1668     int pathsSimplified = 0;
1669     int totalPathCount  = g_slist_length(items);
1670
1671     // set "busy" cursor
1672     desktop->setWaitingCursor();
1673
1674     for (; items != NULL; items = items->next) {
1675         SPItem *item = (SPItem *) items->data;
1676
1677         if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1678           continue;
1679
1680         if (simplifyIndividualPaths) {
1681             Geom::OptRect itemBbox = item->getBounds(sp_item_i2d_affine(item));
1682             if (itemBbox) {
1683                 simplifySize      = L2(itemBbox->dimensions());
1684             } else {
1685                 simplifySize      = 0;
1686             }
1687         }
1688
1689         pathsSimplified++;
1690
1691         if (pathsSimplified % 20 == 0) {
1692             gchar *message = g_strdup_printf(_("%s <b>%d</b> of <b>%d</b> paths simplified..."),
1693                 simplificationType, pathsSimplified, totalPathCount);
1694             desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, message);
1695         }
1696
1697         didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1698             threshold, justCoalesce, angleLimit, breakableAngles, simplifySize, modifySelection);
1699     }
1700
1701     desktop->clearWaitingCursor();
1702
1703     if (pathsSimplified > 20) {
1704         desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, g_strdup_printf(_("<b>%d</b> paths simplified."), pathsSimplified));
1705     }
1706
1707     return didSomething;
1708 }
1709
1710 void
1711 sp_selected_path_simplify_selection(SPDesktop *desktop, float threshold, bool justCoalesce,
1712                                     float angleLimit, bool breakableAngles)
1713 {
1714     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1715
1716     if (selection->isEmpty()) {
1717         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1718                          _("Select <b>path(s)</b> to simplify."));
1719         return;
1720     }
1721
1722     GSList *items = g_slist_copy((GSList *) selection->itemList());
1723
1724     bool didSomething = sp_selected_path_simplify_items(desktop, selection,
1725                                                         items, threshold,
1726                                                         justCoalesce,
1727                                                         angleLimit,
1728                                                         breakableAngles, true);
1729
1730     if (didSomething)
1731         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_SIMPLIFY,
1732                          _("Simplify"));
1733     else
1734         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1735
1736 }
1737
1738
1739 // globals for keeping track of accelerated simplify
1740 static double previousTime      = 0.0;
1741 static gdouble simplifyMultiply = 1.0;
1742
1743 void
1744 sp_selected_path_simplify(SPDesktop *desktop)
1745 {
1746     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1747     gdouble simplifyThreshold =
1748         prefs->getDouble("/options/simplifythreshold/value", 0.003);
1749     bool simplifyJustCoalesce = prefs->getBool("/options/simplifyjustcoalesce/value", 0);
1750
1751     //Get the current time
1752     GTimeVal currentTimeVal;
1753     g_get_current_time(&currentTimeVal);
1754     double currentTime = currentTimeVal.tv_sec * 1000000 +
1755                 currentTimeVal.tv_usec;
1756
1757     //Was the previous call to this function recent? (<0.5 sec)
1758     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1759
1760         // add to the threshold 1/2 of its original value
1761         simplifyMultiply  += 0.5;
1762         simplifyThreshold *= simplifyMultiply;
1763
1764     } else {
1765         // reset to the default
1766         simplifyMultiply = 1;
1767     }
1768
1769     //remember time for next call
1770     previousTime = currentTime;
1771
1772     //g_print("%g\n", simplify_threshold);
1773
1774     //Make the actual call
1775     sp_selected_path_simplify_selection(desktop, simplifyThreshold,
1776                                         simplifyJustCoalesce, 0.0, false);
1777 }
1778
1779
1780
1781 // fonctions utilitaires
1782
1783 bool
1784 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1785 {
1786     if (who == NULL || a == NULL)
1787         return false;
1788     if (who == a)
1789         return true;
1790     return Ancetre(sp_repr_parent(a), who);
1791 }
1792
1793 Path *
1794 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1795 {
1796     SPCurve *curve = curve_for_item(item);
1797
1798     if (curve == NULL)
1799         return NULL;
1800
1801     Geom::PathVector *pathv = pathvector_for_curve(item, curve, doTransformation, transformFull, Geom::identity(), Geom::identity());
1802     curve->unref();
1803
1804     Path *dest = new Path;
1805     dest->LoadPathVector(*pathv);
1806     delete pathv;
1807
1808     return dest;
1809 }
1810
1811 /*
1812  * NOTE: Returns empty pathvector if curve == NULL
1813  * TODO: see if calling this method can be optimized. All the pathvector copying might be slow.
1814  */
1815 Geom::PathVector*
1816 pathvector_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull, Geom::Matrix extraPreAffine, Geom::Matrix extraPostAffine)
1817 {
1818     if (curve == NULL)
1819         return NULL;
1820
1821     Geom::PathVector *dest = new Geom::PathVector;
1822     *dest = curve->get_pathvector(); // Make a copy; must be freed by the caller!
1823
1824     if (doTransformation) {
1825         if (transformFull) {
1826             *dest *= extraPreAffine * sp_item_i2doc_affine(item) * extraPostAffine;
1827         } else {
1828             *dest *= extraPreAffine * (Geom::Matrix)item->transform * extraPostAffine;
1829         }
1830     } else {
1831         *dest *= extraPreAffine * extraPostAffine;
1832     }
1833
1834     return dest;
1835 }
1836
1837 SPCurve* curve_for_item(SPItem *item)
1838 {
1839     if (!item)
1840         return NULL;
1841
1842     SPCurve *curve = NULL;
1843     if (SP_IS_SHAPE(item)) {
1844         if (SP_IS_PATH(item)) {
1845             curve = sp_path_get_curve_for_edit(SP_PATH(item));
1846         } else {
1847             curve = sp_shape_get_curve(SP_SHAPE(item));
1848         }
1849     }
1850     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item))
1851     {
1852         curve = te_get_layout(item)->convertToCurves();
1853     }
1854     else if (SP_IS_IMAGE(item))
1855     {
1856     curve = sp_image_get_curve(SP_IMAGE(item));
1857     }
1858
1859     return curve; // do not forget to unref the curve at some point!
1860 }
1861
1862 boost::optional<Path::cut_position> get_nearest_position_on_Path(Path *path, Geom::Point p, unsigned seg)
1863 {
1864     //get nearest position on path
1865     Path::cut_position pos = path->PointToCurvilignPosition(p, seg);
1866     return pos;
1867 }
1868
1869 Geom::Point get_point_on_Path(Path *path, int piece, double t)
1870 {
1871     Geom::Point p;
1872     path->PointAt(piece, t, p);
1873     return p;
1874 }
1875
1876
1877 /*
1878   Local Variables:
1879   mode:c++
1880   c-file-style:"stroustrup"
1881   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1882   indent-tabs-mode:nil
1883   fill-column:99
1884   End:
1885 */
1886 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :