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 "inkscape.h"
  37 #include "document.h"
  38 #include "message-stack.h"
  39 #include "selection.h"
  40 #include "desktop-handles.h"
  41 #include "desktop.h"
  42 #include "display/canvas-bpath.h"
  43 #include "display/curve.h"
  44 #include <glibmm/i18n.h>
  45 #include "prefs-utils.h"
  46
  47 #include "libnr/n-art-bpath.h"
  48 #include "libnr/nr-path.h"
  49 #include "xml/repr.h"
  50 #include "xml/repr-sorting.h"
  51
  52 #include <libnr/nr-matrix-fns.h>
  53 #include <libnr/nr-matrix-ops.h>
  54 #include <libnr/nr-matrix-translate-ops.h>
  55 #include <libnr/nr-scale-matrix-ops.h>
  56
  57 #include "livarot/Path.h"
  58 #include "livarot/Shape.h"
  59
  60 #include "splivarot.h"
  61
  62 bool   Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who);
  63
  64 void sp_selected_path_boolop(bool_op bop, const unsigned int verb=SP_VERB_NONE, const Glib::ustring description="");
  65 void sp_selected_path_do_offset(bool expand, double prefOffset);
  66 void sp_selected_path_create_offset_object(int expand, bool updating);
  67
  68 void
  69 sp_selected_path_union()
  70 {
  71     sp_selected_path_boolop(bool_op_union, SP_VERB_SELECTION_UNION, _("Union"));
  72 }
  73
  74 void
  75 sp_selected_path_union_skip_undo()
  76 {
  77     sp_selected_path_boolop(bool_op_union, SP_VERB_NONE, _("Union"));
  78 }
  79
  80 void
  81 sp_selected_path_intersect()
  82 {
  83     sp_selected_path_boolop(bool_op_inters, SP_VERB_SELECTION_INTERSECT, _("Intersection"));
  84 }
  85
  86 void
  87 sp_selected_path_diff()
  88 {
  89     sp_selected_path_boolop(bool_op_diff, SP_VERB_SELECTION_DIFF, _("Difference"));
  90 }
  91
  92 void
  93 sp_selected_path_symdiff()
  94 {
  95     sp_selected_path_boolop(bool_op_symdiff, SP_VERB_SELECTION_SYMDIFF, _("Exclusion"));
  96 }
  97 void
  98 sp_selected_path_cut()
  99 {
 100     sp_selected_path_boolop(bool_op_cut, SP_VERB_SELECTION_CUT, _("Division"));
 101 }
 102 void
 103 sp_selected_path_slice()
 104 {
 105     sp_selected_path_boolop(bool_op_slice, SP_VERB_SELECTION_SLICE,  _("Cut path"));
 106 }
 107
 108
 109 // boolean operations
 110 // take the source paths from the file, do the operation, delete the originals and add the results
 111 void
 112 sp_selected_path_boolop(bool_op bop, const unsigned int verb, const Glib::ustring description)
 113 {
 114     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 115
 116     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 117
 118     GSList *il = (GSList *) selection->itemList();
 119
 120     // allow union on a single object for the purpose of removing self overlapse (svn log, revision 13334)
 121     if ( (g_slist_length(il) < 2) && (bop != bool_op_union)) {
 122         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 2 paths</b> to perform a boolean operation."));
 123         return;
 124     }
 125     else if ( g_slist_length(il) < 1 ) {
 126         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 1 path</b> to perform a boolean union."));
 127         return;
 128     }
 129
 130     if (g_slist_length(il) > 2) {
 131         if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 132             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>exactly 2 paths</b> to perform difference, XOR, division, or path cut."));
 133             return;
 134         }
 135     }
 136
 137     // reverseOrderForOp marks whether the order of the list is the top->down order
 138     // it's only used when there are 2 objects, and for operations who need to know the
 139     // topmost object (differences, cuts)
 140     bool reverseOrderForOp = false;
 141
 142     // mettre les elements de la liste dans l'ordre pour ces operations
 143     if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice) {
 144         // check in the tree to find which element of the selection list is topmost (for 2-operand commands only)
 145         Inkscape::XML::Node *a = SP_OBJECT_REPR(il->data);
 146         Inkscape::XML::Node *b = SP_OBJECT_REPR(il->next->data);
 147
 148         if (a == NULL || b == NULL) {
 149             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."));
 150             return;
 151         }
 152
 153         if (Ancetre(a, b)) {
 154             // a is the parent of b, already in the proper order
 155         } else if (Ancetre(b, a)) {
 156             // reverse order
 157             reverseOrderForOp = true;
 158         } else {
 159
 160             // objects are not in parent/child relationship;
 161             // find their lowest common ancestor
 162             Inkscape::XML::Node *dad = LCA(a, b);
 163             if (dad == NULL) {
 164                 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."));
 165                 return;
 166             }
 167
 168             // find the children of the LCA that lead from it to the a and b
 169             Inkscape::XML::Node *as = AncetreFils(a, dad);
 170             Inkscape::XML::Node *bs = AncetreFils(b, dad);
 171
 172             // find out which comes first
 173             for (Inkscape::XML::Node *child = dad->firstChild(); child; child = child->next()) {
 174                 if (child == as) {
 175                     /* a first, so reverse. */
 176                     reverseOrderForOp = true;
 177                     break;
 178                 }
 179                 if (child == bs)
 180                     break;
 181             }
 182         }
 183     }
 184
 185     il = g_slist_copy(il);
 186
 187     // first check if all the input objects have shapes
 188     // otherwise bail out
 189     for (GSList *l = il; l != NULL; l = l->next)
 190     {
 191         SPItem *item = SP_ITEM(l->data);
 192         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item) && !SP_IS_FLOWTEXT(item))
 193         {
 194             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("One of the objects is <b>not a path</b>, cannot perform boolean operation."));
 195             g_slist_free(il);
 196             return;
 197         }
 198     }
 199
 200     // extract the livarot Paths from the source objects
 201     // also get the winding rule specified in the style
 202     int nbOriginaux = g_slist_length(il);
 203     std::vector<Path *> originaux(nbOriginaux);
 204     std::vector<FillRule> origWind(nbOriginaux);
 205     int curOrig;
 206     {
 207         curOrig = 0;
 208         for (GSList *l = il; l != NULL; l = l->next)
 209         {
 210             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(il->data), "style");
 211             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 212             if (val && strcmp(val, "nonzero") == 0) {
 213                 origWind[curOrig]= fill_nonZero;
 214             } else if (val && strcmp(val, "evenodd") == 0) {
 215                 origWind[curOrig]= fill_oddEven;
 216             } else {
 217                 origWind[curOrig]= fill_nonZero;
 218             }
 219
 220             originaux[curOrig] = Path_for_item((SPItem *) l->data, true, true);
 221             if (originaux[curOrig] == NULL || originaux[curOrig]->descr_cmd.size() <= 1)
 222             {
 223                 for (int i = curOrig; i >= 0; i--) delete originaux[i];
 224                 g_slist_free(il);
 225                 return;
 226             }
 227             curOrig++;
 228         }
 229     }
 230     // reverse if needed
 231     // note that the selection list keeps its order
 232     if ( reverseOrderForOp ) {
 233         Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 234         FillRule swai=origWind[0]; origWind[0]=origWind[1]; origWind[1]=swai;
 235     }
 236
 237     // and work
 238     // some temporary instances, first
 239     Shape *theShapeA = new Shape;
 240     Shape *theShapeB = new Shape;
 241     Shape *theShape = new Shape;
 242     Path *res = new Path;
 243     res->SetBackData(false);
 244     Path::cut_position  *toCut=NULL;
 245     int                  nbToCut=0;
 246
 247     if ( bop == bool_op_inters || bop == bool_op_union || bop == bool_op_diff || bop == bool_op_symdiff ) {
 248         // true boolean op
 249         // get the polygons of each path, with the winding rule specified, and apply the operation iteratively
 250         originaux[0]->ConvertWithBackData(0.1);
 251
 252         originaux[0]->Fill(theShape, 0);
 253
 254         theShapeA->ConvertToShape(theShape, origWind[0]);
 255
 256         curOrig = 1;
 257         for (GSList *l = il->next; l != NULL; l = l->next) {
 258             originaux[curOrig]->ConvertWithBackData(0.1);
 259
 260             originaux[curOrig]->Fill(theShape, curOrig);
 261
 262             theShapeB->ConvertToShape(theShape, origWind[curOrig]);
 263
 264             // les elements arrivent en ordre inverse dans la liste
 265             theShape->Booleen(theShapeB, theShapeA, bop);
 266
 267             {
 268                 Shape *swap = theShape;
 269                 theShape = theShapeA;
 270                 theShapeA = swap;
 271             }
 272             curOrig++;
 273         }
 274
 275         {
 276             Shape *swap = theShape;
 277             theShape = theShapeA;
 278             theShapeA = swap;
 279         }
 280
 281     } else if ( bop == bool_op_cut ) {
 282         // cuts= sort of a bastard boolean operation, thus not the axact same modus operandi
 283         // technically, the cut path is not necessarily a polygon (thus has no winding rule)
 284         // it is just uncrossed, and cleaned from duplicate edges and points
 285         // then it's fed to Booleen() which will uncross it against the other path
 286         // then comes the trick: each edge of the cut path is duplicated (one in each direction),
 287         // thus making a polygon. the weight of the edges of the cut are all 0, but
 288         // the Booleen need to invert the ones inside the source polygon (for the subsequent
 289         // ConvertToForme)
 290
 291         // the cut path needs to have the highest pathID in the back data
 292         // that's how the Booleen() function knows it's an edge of the cut
 293
 294         // FIXME: this gives poor results, the final paths are full of extraneous nodes. Decreasing
 295         // ConvertWithBackData parameter below simply increases the number of nodes, so for now I
 296         // left it at 1.0. Investigate replacing this by a combination of difference and
 297         // intersection of the same two paths. -- bb
 298         {
 299             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 300             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 301         }
 302         originaux[0]->ConvertWithBackData(1.0);
 303
 304         originaux[0]->Fill(theShape, 0);
 305
 306         theShapeA->ConvertToShape(theShape, origWind[0]);
 307
 308         originaux[1]->ConvertWithBackData(1.0);
 309
 310         originaux[1]->Fill(theShape, 1,false,false,false); //do not closeIfNeeded
 311
 312         theShapeB->ConvertToShape(theShape, fill_justDont); // fill_justDont doesn't computes winding numbers
 313
 314         // les elements arrivent en ordre inverse dans la liste
 315         theShape->Booleen(theShapeB, theShapeA, bool_op_cut, 1);
 316
 317     } else if ( bop == bool_op_slice ) {
 318         // slice is not really a boolean operation
 319         // you just put the 2 shapes in a single polygon, uncross it
 320         // the points where the degree is > 2 are intersections
 321         // just check it's an intersection on the path you want to cut, and keep it
 322         // the intersections you have found are then fed to ConvertPositionsToMoveTo() which will
 323         // make new subpath at each one of these positions
 324         // inversion pour l'op\8eration
 325         {
 326             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 327             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 328         }
 329         originaux[0]->ConvertWithBackData(1.0);
 330
 331         originaux[0]->Fill(theShapeA, 0,false,false,false); // don't closeIfNeeded
 332
 333         originaux[1]->ConvertWithBackData(1.0);
 334
 335         originaux[1]->Fill(theShapeA, 1,true,false,false);// don't closeIfNeeded and just dump in the shape, don't reset it
 336
 337         theShape->ConvertToShape(theShapeA, fill_justDont);
 338
 339         if ( theShape->hasBackData() ) {
 340             // should always be the case, but ya never know
 341             {
 342                 for (int i = 0; i < theShape->numberOfPoints(); i++) {
 343                     if ( theShape->getPoint(i).totalDegree() > 2 ) {
 344                         // possibly an intersection
 345                         // we need to check that at least one edge from the source path is incident to it
 346                         // before we declare it's an intersection
 347                         int cb = theShape->getPoint(i).incidentEdge[FIRST];
 348                         int   nbOrig=0;
 349                         int   nbOther=0;
 350                         int   piece=-1;
 351                         float t=0.0;
 352                         while ( cb >= 0 && cb < theShape->numberOfEdges() ) {
 353                             if ( theShape->ebData[cb].pathID == 0 ) {
 354                                 // the source has an edge incident to the point, get its position on the path
 355                                 piece=theShape->ebData[cb].pieceID;
 356                                 if ( theShape->getEdge(cb).st == i ) {
 357                                     t=theShape->ebData[cb].tSt;
 358                                 } else {
 359                                     t=theShape->ebData[cb].tEn;
 360                                 }
 361                                 nbOrig++;
 362                             }
 363                             if ( theShape->ebData[cb].pathID == 1 ) nbOther++; // the cut is incident to this point
 364                             cb=theShape->NextAt(i, cb);
 365                         }
 366                         if ( nbOrig > 0 && nbOther > 0 ) {
 367                             // point incident to both path and cut: an intersection
 368                             // note that you only keep one position on the source; you could have degenerate
 369                             // cases where the source crosses itself at this point, and you wouyld miss an intersection
 370                             toCut=(Path::cut_position*)realloc(toCut, (nbToCut+1)*sizeof(Path::cut_position));
 371                             toCut[nbToCut].piece=piece;
 372                             toCut[nbToCut].t=t;
 373                             nbToCut++;
 374                         }
 375                     }
 376                 }
 377             }
 378             {
 379                 // i think it's useless now
 380                 int i = theShape->numberOfEdges() - 1;
 381                 for (;i>=0;i--) {
 382                     if ( theShape->ebData[i].pathID == 1 ) {
 383                         theShape->SubEdge(i);
 384                     }
 385                 }
 386             }
 387
 388         }
 389     }
 390
 391     int*    nesting=NULL;
 392     int*    conts=NULL;
 393     int     nbNest=0;
 394     // pour compenser le swap juste avant
 395     if ( bop == bool_op_slice ) {
 396 //    theShape->ConvertToForme(res, nbOriginaux, originaux, true);
 397 //    res->ConvertForcedToMoveTo();
 398         res->Copy(originaux[0]);
 399         res->ConvertPositionsToMoveTo(nbToCut, toCut); // cut where you found intersections
 400         free(toCut);
 401     } else if ( bop == bool_op_cut ) {
 402         // il faut appeler pour desallouer PointData (pas vital, mais bon)
 403         // the Booleen() function did not deallocated the point_data array in theShape, because this
 404         // function needs it.
 405         // this function uses the point_data to get the winding number of each path (ie: is a hole or not)
 406         // for later reconstruction in objects, you also need to extract which path is parent of holes (nesting info)
 407         theShape->ConvertToFormeNested(res, nbOriginaux, &originaux[0], 1, nbNest, nesting, conts);
 408     } else {
 409         theShape->ConvertToForme(res, nbOriginaux, &originaux[0]);
 410     }
 411
 412     delete theShape;
 413     delete theShapeA;
 414     delete theShapeB;
 415     for (int i = 0; i < nbOriginaux; i++)  delete originaux[i];
 416
 417     if (res->descr_cmd.size() <= 1)
 418     {
 419         // only one command, presumably a moveto: it isn't a path
 420         for (GSList *l = il; l != NULL; l = l->next)
 421         {
 422             SP_OBJECT(l->data)->deleteObject();
 423         }
 424         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 425                          description);
 426         selection->clear();
 427
 428         delete res;
 429         g_slist_free(il);
 430         return;
 431     }
 432
 433     // get the source path object
 434     SPObject *source;
 435     if ( bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 436         if (reverseOrderForOp) {
 437              source = SP_OBJECT(il->data);
 438         } else {
 439              source = SP_OBJECT(il->next->data);
 440         }
 441     } else {
 442         // find out the bottom object
 443         GSList *sorted = g_slist_copy((GSList *) selection->reprList());
 444
 445         sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
 446
 447         source = sp_desktop_document(desktop)->
 448             getObjectByRepr((Inkscape::XML::Node *)sorted->data);
 449
 450         g_slist_free(sorted);
 451     }
 452
 453     // adjust style properties that depend on a possible transform in the source object in order
 454     // to get a correct style attribute for the new path
 455     SPItem* item_source = SP_ITEM(source);
 456     NR::Matrix i2root = sp_item_i2root_affine(item_source);
 457     sp_item_adjust_stroke(item_source, NR::expansion(i2root));
 458     sp_item_adjust_pattern(item_source, i2root);
 459     sp_item_adjust_gradient(item_source, i2root);
 460     sp_item_adjust_livepatheffect(item_source, i2root);
 461
 462     Inkscape::XML::Node *repr_source = SP_OBJECT_REPR(source);
 463
 464     // remember important aspects of the source path, to be restored
 465     gint pos = repr_source->position();
 466     Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
 467     gchar const *id = repr_source->attribute("id");
 468     gchar const *style = repr_source->attribute("style");
 469     gchar const *mask = repr_source->attribute("mask");
 470     gchar const *clip_path = repr_source->attribute("clip-path");
 471
 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     NR::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         repr->setPosition(pos > 0 ? pos : 0);
 581
 582         selection->add(repr);
 583         Inkscape::GC::release(repr);
 584     }
 585
 586     g_free(transform);
 587
 588     if (verb != SP_VERB_NONE) {
 589         sp_document_done(sp_desktop_document(desktop), verb, description);
 590     }
 591
 592     delete res;
 593 }
 594
 595
 596 void
 597 sp_selected_path_outline()
 598 {
 599     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 600
 601     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 602
 603     if (selection->isEmpty()) {
 604         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>stroked path(s)</b> to convert stroke to path."));
 605         return;
 606     }
 607
 608     bool did = false;
 609
 610     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 611          items != NULL;
 612          items = items->next) {
 613
 614         SPItem *item = (SPItem *) items->data;
 615
 616         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 617             continue;
 618
 619         SPCurve *curve = NULL;
 620         if (SP_IS_SHAPE(item)) {
 621             curve = sp_shape_get_curve(SP_SHAPE(item));
 622             if (curve == NULL)
 623                 continue;
 624         }
 625         if (SP_IS_TEXT(item)) {
 626             curve = SP_TEXT(item)->getNormalizedBpath();
 627             if (curve == NULL)
 628                 continue;
 629         }
 630
 631         {   // pas de stroke pas de chocolat
 632             SPCSSAttr *css = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 633             gchar const *val = sp_repr_css_property(css, "stroke", NULL);
 634
 635             if (val == NULL || strcmp(val, "none") == 0) {
 636                 sp_curve_unref(curve);
 637                 continue;
 638             }
 639         }
 640
 641         // remember old stroke style, to be set on fill
 642         SPCSSAttr *ncss;
 643         {
 644             SPCSSAttr *ocss = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 645             gchar const *val = sp_repr_css_property(ocss, "stroke", NULL);
 646             gchar const *opac = sp_repr_css_property(ocss, "stroke-opacity", NULL);
 647
 648             ncss = sp_repr_css_attr_new();
 649
 650             sp_repr_css_set_property(ncss, "stroke", "none");
 651             sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
 652             sp_repr_css_set_property(ncss, "fill", val);
 653             if ( opac ) {
 654                 sp_repr_css_set_property(ncss, "fill-opacity", opac);
 655             } else {
 656                 sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
 657             }
 658             sp_repr_css_unset_property(ncss, "marker-start");
 659             sp_repr_css_unset_property(ncss, "marker-mid");
 660             sp_repr_css_unset_property(ncss, "marker-end");
 661         }
 662
 663         NR::Matrix const transform(item->transform);
 664         float const scale = NR::expansion(transform);
 665         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
 666         SPStyle *i_style = SP_OBJECT(item)->style;
 667         gchar const *mask = SP_OBJECT_REPR(item)->attribute("mask");
 668         gchar const *clip_path = SP_OBJECT_REPR(item)->attribute("clip-path");
 669
 670         float o_width, o_miter;
 671         JoinType o_join;
 672         ButtType o_butt;
 673
 674         {
 675             int jointype, captype;
 676
 677             jointype = i_style->stroke_linejoin.computed;
 678             captype = i_style->stroke_linecap.computed;
 679             o_width = i_style->stroke_width.computed;
 680
 681             switch (jointype) {
 682                 case SP_STROKE_LINEJOIN_MITER:
 683                     o_join = join_pointy;
 684                     break;
 685                 case SP_STROKE_LINEJOIN_ROUND:
 686                     o_join = join_round;
 687                     break;
 688                 default:
 689                     o_join = join_straight;
 690                     break;
 691             }
 692
 693             switch (captype) {
 694                 case SP_STROKE_LINECAP_SQUARE:
 695                     o_butt = butt_square;
 696                     break;
 697                 case SP_STROKE_LINECAP_ROUND:
 698                     o_butt = butt_round;
 699                     break;
 700                 default:
 701                     o_butt = butt_straight;
 702                     break;
 703             }
 704
 705             if (o_width < 0.1)
 706                 o_width = 0.1;
 707             o_miter = i_style->stroke_miterlimit.value * o_width;
 708         }
 709
 710         Path *orig = Path_for_item(item, false);
 711         if (orig == NULL) {
 712             g_free(style);
 713             sp_curve_unref(curve);
 714             continue;
 715         }
 716
 717         Path *res = new Path;
 718         res->SetBackData(false);
 719
 720         if (i_style->stroke_dash.n_dash) {
 721             // For dashed strokes, use Stroke method, because Outline can't do dashes
 722             // However Stroke adds lots of extra nodes _or_ makes the path crooked, so consider this a temporary workaround
 723
 724             orig->ConvertWithBackData(0.1);
 725
 726             orig->DashPolylineFromStyle(i_style, scale, 0);
 727
 728             Shape* theShape = new Shape;
 729             orig->Stroke(theShape, false, 0.5*o_width, o_join, o_butt,
 730                          0.5 * o_miter);
 731             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 732
 733             Shape *theRes = new Shape;
 734
 735             theRes->ConvertToShape(theShape, fill_positive);
 736
 737             Path *originaux[1];
 738             originaux[0] = res;
 739             theRes->ConvertToForme(orig, 1, originaux);
 740
 741             res->Coalesce(5.0);
 742
 743             delete theShape;
 744             delete theRes;
 745
 746         } else {
 747
 748             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 749
 750             orig->Coalesce(0.5 * o_width);
 751
 752             Shape *theShape = new Shape;
 753             Shape *theRes = new Shape;
 754
 755             res->ConvertWithBackData(1.0);
 756             res->Fill(theShape, 0);
 757             theRes->ConvertToShape(theShape, fill_positive);
 758
 759             Path *originaux[1];
 760             originaux[0] = res;
 761             theRes->ConvertToForme(orig, 1, originaux);
 762
 763             delete theShape;
 764             delete theRes;
 765         }
 766
 767         if (orig->descr_cmd.size() <= 1) {
 768             // ca a merd\8e, ou bien le resultat est vide
 769             delete res;
 770             delete orig;
 771             g_free(style);
 772             continue;
 773         }
 774
 775         did = true;
 776
 777         // remember the position of the item
 778         gint pos = SP_OBJECT_REPR(item)->position();
 779         // remember parent
 780         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 781         // remember id
 782         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 783
 784         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
 785
 786             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 787             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 788
 789             // restore old style
 790             repr->setAttribute("style", style);
 791
 792             // set old stroke style on fill
 793             sp_repr_css_change(repr, ncss, "style");
 794
 795             sp_repr_css_attr_unref(ncss);
 796
 797             gchar *str = orig->svg_dump_path();
 798             repr->setAttribute("d", str);
 799             g_free(str);
 800
 801             if (mask)
 802                 repr->setAttribute("mask", mask);
 803             if (clip_path)
 804                 repr->setAttribute("clip-path", clip_path);
 805
 806             if (SP_IS_SHAPE(item) && sp_shape_has_markers (SP_SHAPE(item))) {
 807
 808                 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 809                 Inkscape::XML::Node *g_repr = xml_doc->createElement("svg:g");
 810
 811                 // add the group to the parent
 812                 parent->appendChild(g_repr);
 813                 // move to the saved position
 814                 g_repr->setPosition(pos > 0 ? pos : 0);
 815
 816                 g_repr->appendChild(repr);
 817                 repr->setAttribute("id", id);
 818                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 819                 sp_item_write_transform(newitem, repr, transform);
 820
 821                 SPShape *shape = SP_SHAPE(item);
 822
 823                 for (NArtBpath* bp = SP_CURVE_BPATH(shape->curve); bp->code != NR_END; bp++) {
 824                     for (int m = SP_MARKER_LOC_START; m < SP_MARKER_LOC_QTY; m++) {
 825                         if (sp_shape_marker_required (shape, m, bp)) {
 826
 827                             SPMarker* marker = SP_MARKER (shape->marker[m]);
 828                             SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[m]));
 829
 830                             NR::Matrix tr(sp_shape_marker_get_transform(shape, bp));
 831
 832                             if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
 833                                 tr = NR::scale(i_style->stroke_width.computed) * tr;
 834                             }
 835
 836                             // total marker transform
 837                             tr = marker_item->transform * marker->c2p * tr * transform;
 838
 839                             if (SP_OBJECT_REPR(marker_item)) {
 840                                 Inkscape::XML::Node *m_repr = SP_OBJECT_REPR(marker_item)->duplicate(xml_doc);
 841                                 g_repr->appendChild(m_repr);
 842                                 SPItem *marker_item = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(m_repr);
 843                                 sp_item_write_transform(marker_item, m_repr, tr);
 844                             }
 845                         }
 846                     }
 847                 }
 848
 849
 850                 selection->add(g_repr);
 851
 852                 Inkscape::GC::release(g_repr);
 853
 854
 855             } else {
 856
 857                 // add the new repr to the parent
 858                 parent->appendChild(repr);
 859
 860                 // move to the saved position
 861                 repr->setPosition(pos > 0 ? pos : 0);
 862
 863                 repr->setAttribute("id", id);
 864
 865                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 866                 sp_item_write_transform(newitem, repr, transform);
 867
 868                 selection->add(repr);
 869
 870             }
 871
 872             Inkscape::GC::release(repr);
 873
 874             sp_curve_unref(curve);
 875             selection->remove(item);
 876             SP_OBJECT(item)->deleteObject(false);
 877
 878         }
 879
 880         delete res;
 881         delete orig;
 882         g_free(style);
 883
 884     }
 885
 886     if (did) {
 887         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_OUTLINE,
 888                          _("Convert stroke to path"));
 889     } else {
 890         // TRANSLATORS: "to outline" means "to convert stroke to path"
 891         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> in the selection."));
 892         return;
 893     }
 894 }
 895
 896
 897 void
 898 sp_selected_path_offset()
 899 {
 900     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 901
 902     sp_selected_path_do_offset(true, prefOffset);
 903 }
 904 void
 905 sp_selected_path_inset()
 906 {
 907     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 908
 909     sp_selected_path_do_offset(false, prefOffset);
 910 }
 911
 912 void
 913 sp_selected_path_offset_screen(double pixels)
 914 {
 915     sp_selected_path_do_offset(true,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 916 }
 917
 918 void
 919 sp_selected_path_inset_screen(double pixels)
 920 {
 921     sp_selected_path_do_offset(false,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 922 }
 923
 924
 925 void sp_selected_path_create_offset_object_zero()
 926 {
 927     sp_selected_path_create_offset_object(0, false);
 928 }
 929
 930 void sp_selected_path_create_offset()
 931 {
 932     sp_selected_path_create_offset_object(1, false);
 933 }
 934 void sp_selected_path_create_inset()
 935 {
 936     sp_selected_path_create_offset_object(-1, false);
 937 }
 938
 939 void sp_selected_path_create_updating_offset_object_zero()
 940 {
 941     sp_selected_path_create_offset_object(0, true);
 942 }
 943
 944 void sp_selected_path_create_updating_offset()
 945 {
 946     sp_selected_path_create_offset_object(1, true);
 947 }
 948 void sp_selected_path_create_updating_inset()
 949 {
 950     sp_selected_path_create_offset_object(-1, true);
 951 }
 952
 953 void
 954 sp_selected_path_create_offset_object(int expand, bool updating)
 955 {
 956     Inkscape::Selection *selection;
 957     Inkscape::XML::Node *repr;
 958     SPItem *item;
 959     SPCurve *curve;
 960     gchar *style, *str;
 961     SPDesktop *desktop;
 962     float o_width, o_miter;
 963     JoinType o_join;
 964     ButtType o_butt;
 965
 966     curve = NULL;
 967
 968     desktop = SP_ACTIVE_DESKTOP;
 969
 970     selection = sp_desktop_selection(desktop);
 971
 972     item = selection->singleItem();
 973
 974     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
 975         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
 976         return;
 977     }
 978     if (SP_IS_SHAPE(item))
 979     {
 980         curve = sp_shape_get_curve(SP_SHAPE(item));
 981         if (curve == NULL)
 982             return;
 983     }
 984     if (SP_IS_TEXT(item))
 985     {
 986         curve = SP_TEXT(item)->getNormalizedBpath();
 987         if (curve == NULL)
 988             return;
 989     }
 990
 991     NR::Matrix const transform(item->transform);
 992
 993     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
 994
 995     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
 996
 997     // remember the position of the item
 998     gint pos = SP_OBJECT_REPR(item)->position();
 999     // remember parent
1000     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1001
1002     {
1003         SPStyle *i_style = SP_OBJECT(item)->style;
1004         int jointype, captype;
1005
1006         jointype = i_style->stroke_linejoin.value;
1007         captype = i_style->stroke_linecap.value;
1008         o_width = i_style->stroke_width.computed;
1009         if (jointype == SP_STROKE_LINEJOIN_MITER)
1010         {
1011             o_join = join_pointy;
1012         }
1013         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
1014         {
1015             o_join = join_round;
1016         }
1017         else
1018         {
1019             o_join = join_straight;
1020         }
1021         if (captype == SP_STROKE_LINECAP_SQUARE)
1022         {
1023             o_butt = butt_square;
1024         }
1025         else if (captype == SP_STROKE_LINECAP_ROUND)
1026         {
1027             o_butt = butt_round;
1028         }
1029         else
1030         {
1031             o_butt = butt_straight;
1032         }
1033
1034         {
1035             double prefOffset = 1.0;
1036             prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", prefOffset);
1037             o_width = prefOffset;
1038         }
1039
1040         if (o_width < 0.01)
1041             o_width = 0.01;
1042         o_miter = i_style->stroke_miterlimit.value * o_width;
1043     }
1044
1045     Path *orig = Path_for_item(item, true, false);
1046     if (orig == NULL)
1047     {
1048         g_free(style);
1049         sp_curve_unref(curve);
1050         return;
1051     }
1052
1053     Path *res = new Path;
1054     res->SetBackData(false);
1055
1056     {
1057         Shape *theShape = new Shape;
1058         Shape *theRes = new Shape;
1059
1060         orig->ConvertWithBackData(1.0);
1061         orig->Fill(theShape, 0);
1062
1063         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1064         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1065         if (val && strcmp(val, "nonzero") == 0)
1066         {
1067             theRes->ConvertToShape(theShape, fill_nonZero);
1068         }
1069         else if (val && strcmp(val, "evenodd") == 0)
1070         {
1071             theRes->ConvertToShape(theShape, fill_oddEven);
1072         }
1073         else
1074         {
1075             theRes->ConvertToShape(theShape, fill_nonZero);
1076         }
1077
1078         Path *originaux[1];
1079         originaux[0] = orig;
1080         theRes->ConvertToForme(res, 1, originaux);
1081
1082         delete theShape;
1083         delete theRes;
1084     }
1085
1086     sp_curve_unref(curve);
1087
1088     if (res->descr_cmd.size() <= 1)
1089     {
1090         // pas vraiment de points sur le resultat
1091         // donc il ne reste rien
1092         sp_document_done(sp_desktop_document(desktop),
1093                          (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1094                           : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1095                          (updating ? _("Create linked offset")
1096                           : _("Create dynamic offset")));
1097         selection->clear();
1098
1099         delete res;
1100         delete orig;
1101         g_free(style);
1102         return;
1103     }
1104
1105     {
1106         gchar tstr[80];
1107
1108         tstr[79] = '\0';
1109
1110         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1111         repr = xml_doc->createElement("svg:path");
1112         repr->setAttribute("sodipodi:type", "inkscape:offset");
1113         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1114                                                           ? o_width
1115                                                           : expand < 0
1116                                                           ? -o_width
1117                                                           : 0 ));
1118
1119         str = res->svg_dump_path();
1120         repr->setAttribute("inkscape:original", str);
1121         g_free(str);
1122
1123         if ( updating ) {
1124             char const *id = SP_OBJECT(item)->repr->attribute("id");
1125             char const *uri = g_strdup_printf("#%s", id);
1126             repr->setAttribute("xlink:href", uri);
1127             g_free((void *) uri);
1128         } else {
1129             repr->setAttribute("inkscape:href", NULL);
1130         }
1131
1132         repr->setAttribute("style", style);
1133
1134         // add the new repr to the parent
1135         parent->appendChild(repr);
1136
1137         // move to the saved position
1138         repr->setPosition(pos > 0 ? pos : 0);
1139
1140         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1141
1142         if ( updating ) {
1143             // on conserve l'original
1144             // we reapply the transform to the original (offset will feel it)
1145             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1146         } else {
1147             // delete original, apply the transform to the offset
1148             SP_OBJECT(item)->deleteObject(false);
1149             sp_item_write_transform(nitem, repr, transform);
1150         }
1151
1152         // The object just created from a temporary repr is only a seed.
1153         // We need to invoke its write which will update its real repr (in particular adding d=)
1154         SP_OBJECT(nitem)->updateRepr();
1155
1156         Inkscape::GC::release(repr);
1157
1158         selection->set(nitem);
1159     }
1160
1161     sp_document_done(sp_desktop_document(desktop),
1162                      (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1163                       : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1164                      (updating ? _("Create linked offset")
1165                       : _("Create dynamic offset")));
1166
1167     delete res;
1168     delete orig;
1169
1170     g_free(style);
1171 }
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184 void
1185 sp_selected_path_do_offset(bool expand, double prefOffset)
1186 {
1187     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1188
1189     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1190
1191     if (selection->isEmpty()) {
1192         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1193         return;
1194     }
1195
1196     bool did = false;
1197
1198     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1199          items != NULL;
1200          items = items->next) {
1201
1202         SPItem *item = (SPItem *) items->data;
1203
1204         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1205             continue;
1206
1207         SPCurve *curve = NULL;
1208         if (SP_IS_SHAPE(item)) {
1209             curve = sp_shape_get_curve(SP_SHAPE(item));
1210             if (curve == NULL)
1211                 continue;
1212         }
1213         if (SP_IS_TEXT(item)) {
1214             curve = SP_TEXT(item)->getNormalizedBpath();
1215             if (curve == NULL)
1216                 continue;
1217         }
1218
1219         NR::Matrix const transform(item->transform);
1220
1221         sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1222
1223         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1224
1225         float o_width, o_miter;
1226         JoinType o_join;
1227         ButtType o_butt;
1228
1229         {
1230             SPStyle *i_style = SP_OBJECT(item)->style;
1231             int jointype, captype;
1232
1233             jointype = i_style->stroke_linejoin.value;
1234             captype = i_style->stroke_linecap.value;
1235             o_width = i_style->stroke_width.computed;
1236
1237             switch (jointype) {
1238                 case SP_STROKE_LINEJOIN_MITER:
1239                     o_join = join_pointy;
1240                     break;
1241                 case SP_STROKE_LINEJOIN_ROUND:
1242                     o_join = join_round;
1243                     break;
1244                 default:
1245                     o_join = join_straight;
1246                     break;
1247             }
1248
1249             switch (captype) {
1250                 case SP_STROKE_LINECAP_SQUARE:
1251                     o_butt = butt_square;
1252                     break;
1253                 case SP_STROKE_LINECAP_ROUND:
1254                     o_butt = butt_round;
1255                     break;
1256                 default:
1257                     o_butt = butt_straight;
1258                     break;
1259             }
1260
1261             o_width = prefOffset;
1262
1263             if (o_width < 0.1)
1264                 o_width = 0.1;
1265             o_miter = i_style->stroke_miterlimit.value * o_width;
1266         }
1267
1268         Path *orig = Path_for_item(item, false);
1269         if (orig == NULL) {
1270             g_free(style);
1271             sp_curve_unref(curve);
1272             continue;
1273         }
1274
1275         Path *res = new Path;
1276         res->SetBackData(false);
1277
1278         {
1279             Shape *theShape = new Shape;
1280             Shape *theRes = new Shape;
1281
1282             orig->ConvertWithBackData(0.03);
1283             orig->Fill(theShape, 0);
1284
1285             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1286             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1287             if (val && strcmp(val, "nonzero") == 0)
1288             {
1289                 theRes->ConvertToShape(theShape, fill_nonZero);
1290             }
1291             else if (val && strcmp(val, "evenodd") == 0)
1292             {
1293                 theRes->ConvertToShape(theShape, fill_oddEven);
1294             }
1295             else
1296             {
1297                 theRes->ConvertToShape(theShape, fill_nonZero);
1298             }
1299
1300             // et maintenant: offset
1301             // methode inexacte
1302 /*                      Path *originaux[1];
1303                         originaux[0] = orig;
1304                         theRes->ConvertToForme(res, 1, originaux);
1305
1306                         if (expand) {
1307                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1308                         } else {
1309                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1310                         }
1311
1312                         orig->ConvertWithBackData(1.0);
1313                         orig->Fill(theShape, 0);
1314                         theRes->ConvertToShape(theShape, fill_positive);
1315                         originaux[0] = orig;
1316                         theRes->ConvertToForme(res, 1, originaux);
1317
1318                         if (o_width >= 0.5) {
1319                         //     res->Coalesce(1.0);
1320                         res->ConvertEvenLines(1.0);
1321                         res->Simplify(1.0);
1322                         } else {
1323                         //      res->Coalesce(o_width);
1324                         res->ConvertEvenLines(1.0*o_width);
1325                         res->Simplify(1.0 * o_width);
1326                         }    */
1327             // methode par makeoffset
1328
1329             if (expand)
1330             {
1331                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1332             }
1333             else
1334             {
1335                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1336             }
1337             theRes->ConvertToShape(theShape, fill_positive);
1338
1339             res->Reset();
1340             theRes->ConvertToForme(res);
1341
1342             if (o_width >= 1.0)
1343             {
1344                 res->ConvertEvenLines(1.0);
1345                 res->Simplify(1.0);
1346             }
1347             else
1348             {
1349                 res->ConvertEvenLines(1.0*o_width);
1350                 res->Simplify(1.0 * o_width);
1351             }
1352
1353             delete theShape;
1354             delete theRes;
1355         }
1356
1357         did = true;
1358
1359         sp_curve_unref(curve);
1360         // remember the position of the item
1361         gint pos = SP_OBJECT_REPR(item)->position();
1362         // remember parent
1363         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1364         // remember id
1365         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1366
1367         selection->remove(item);
1368         SP_OBJECT(item)->deleteObject(false);
1369
1370         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1371
1372             gchar tstr[80];
1373
1374             tstr[79] = '\0';
1375
1376             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1377             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1378
1379             repr->setAttribute("style", style);
1380
1381             gchar *str = res->svg_dump_path();
1382             repr->setAttribute("d", str);
1383             g_free(str);
1384
1385             // add the new repr to the parent
1386             parent->appendChild(repr);
1387
1388             // move to the saved position
1389             repr->setPosition(pos > 0 ? pos : 0);
1390
1391             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1392
1393             // reapply the transform
1394             sp_item_write_transform(newitem, repr, transform);
1395
1396             repr->setAttribute("id", id);
1397
1398             selection->add(repr);
1399
1400             Inkscape::GC::release(repr);
1401         }
1402
1403         delete orig;
1404         delete res;
1405     }
1406
1407     if (did) {
1408         sp_document_done(sp_desktop_document(desktop),
1409                          (expand ? SP_VERB_SELECTION_OFFSET : SP_VERB_SELECTION_INSET),
1410                          (expand ? _("Outset path") : _("Inset path")));
1411     } else {
1412         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1413         return;
1414     }
1415 }
1416
1417
1418 static bool
1419 sp_selected_path_simplify_items(SPDesktop *desktop,
1420                                 Inkscape::Selection *selection, GSList *items,
1421                                 float threshold,  bool justCoalesce,
1422                                 float angleLimit, bool breakableAngles,
1423                                 bool modifySelection);
1424
1425
1426 //return true if we changed something, else false
1427 bool
1428 sp_selected_path_simplify_item(SPDesktop *desktop,
1429                  Inkscape::Selection *selection, SPItem *item,
1430                  float threshold,  bool justCoalesce,
1431                  float angleLimit, bool breakableAngles,
1432                  gdouble size,     bool modifySelection)
1433 {
1434     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1435         return false;
1436
1437     //If this is a group, do the children instead
1438     if (SP_IS_GROUP(item)) {
1439         GSList *items = sp_item_group_item_list(SP_GROUP(item));
1440
1441         return sp_selected_path_simplify_items(desktop, selection, items,
1442                                                threshold, justCoalesce,
1443                                                angleLimit, breakableAngles,
1444                                                false);
1445     }
1446
1447
1448     SPCurve *curve = NULL;
1449
1450     if (SP_IS_SHAPE(item)) {
1451         curve = sp_shape_get_curve(SP_SHAPE(item));
1452         if (!curve)
1453             return false;
1454     }
1455
1456     if (SP_IS_TEXT(item)) {
1457         curve = SP_TEXT(item)->getNormalizedBpath();
1458         if (!curve)
1459             return false;
1460     }
1461
1462     // save the transform, to re-apply it after simplification
1463     NR::Matrix const transform(item->transform);
1464
1465     /*
1466        reset the transform, effectively transforming the item by transform.inverse();
1467        this is necessary so that the item is transformed twice back and forth,
1468        allowing all compensations to cancel out regardless of the preferences
1469     */
1470     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1471
1472     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1473     gchar *mask = g_strdup(SP_OBJECT_REPR(item)->attribute("mask"));
1474     gchar *clip_path = g_strdup(SP_OBJECT_REPR(item)->attribute("clip-path"));
1475
1476     Path *orig = Path_for_item(item, false);
1477     if (orig == NULL) {
1478         g_free(style);
1479         sp_curve_unref(curve);
1480         return false;
1481     }
1482
1483     sp_curve_unref(curve);
1484     // remember the position of the item
1485     gint pos = SP_OBJECT_REPR(item)->position();
1486     // remember parent
1487     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1488     // remember id
1489     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1490     // remember path effect
1491     char const *patheffect = SP_OBJECT_REPR(item)->attribute("inkscape:path-effect");
1492
1493     //If a group was selected, to not change the selection list
1494     if (modifySelection)
1495         selection->remove(item);
1496
1497     SP_OBJECT(item)->deleteObject(false);
1498
1499     if ( justCoalesce ) {
1500         orig->Coalesce(threshold * size);
1501     } else {
1502         orig->ConvertEvenLines(threshold * size);
1503         orig->Simplify(threshold * size);
1504     }
1505
1506     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1507     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1508
1509     // restore style, mask and clip-path
1510     repr->setAttribute("style", style);
1511     g_free(style);
1512
1513     if ( mask ) {
1514         repr->setAttribute("mask", mask);
1515         g_free(mask);
1516     }
1517
1518     if ( clip_path ) {
1519         repr->setAttribute("clip-path", clip_path);
1520         g_free(clip_path);
1521     }
1522
1523     // path
1524     gchar *str = orig->svg_dump_path();
1525     if (patheffect)
1526         repr->setAttribute("inkscape:original-d", str);
1527     else
1528         repr->setAttribute("d", str);
1529     g_free(str);
1530
1531     // restore id
1532     repr->setAttribute("id", id);
1533
1534     // add the new repr to the parent
1535     parent->appendChild(repr);
1536
1537     // move to the saved position
1538     repr->setPosition(pos > 0 ? pos : 0);
1539
1540     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1541
1542     // reapply the transform
1543     sp_item_write_transform(newitem, repr, transform);
1544
1545     // restore path effect
1546     repr->setAttribute("inkscape:path-effect", patheffect);
1547
1548     //If we are not in a selected group
1549     if (modifySelection)
1550         selection->add(repr);
1551
1552     Inkscape::GC::release(repr);
1553
1554     // clean up
1555     if (orig) delete orig;
1556
1557     return true;
1558 }
1559
1560
1561 bool
1562 sp_selected_path_simplify_items(SPDesktop *desktop,
1563                                 Inkscape::Selection *selection, GSList *items,
1564                                 float threshold,  bool justCoalesce,
1565                                 float angleLimit, bool breakableAngles,
1566                                 bool modifySelection)
1567 {
1568   bool simplifyIndividualPaths =
1569     (bool) prefs_get_int_attribute("options.simplifyindividualpaths", "value", 0);
1570
1571   gchar *simplificationType;
1572   if (simplifyIndividualPaths) {
1573       simplificationType = _("Simplifying paths (separately):");
1574   } else {
1575       simplificationType = _("Simplifying paths:");
1576   }
1577
1578   bool didSomething = false;
1579
1580   NR::Maybe<NR::Rect> selectionBbox = selection->bounds();
1581   if (!selectionBbox) {
1582     return false;
1583   }
1584   gdouble selectionSize  = L2(selectionBbox->dimensions());
1585
1586   gdouble simplifySize  = selectionSize;
1587
1588   int pathsSimplified = 0;
1589   int totalPathCount  = g_slist_length(items);
1590
1591   // set "busy" cursor
1592   desktop->setWaitingCursor();
1593
1594   for (; items != NULL; items = items->next) {
1595       SPItem *item = (SPItem *) items->data;
1596
1597       if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1598           continue;
1599
1600       if (simplifyIndividualPaths) {
1601           NR::Maybe<NR::Rect> itemBbox = item->getBounds(sp_item_i2d_affine(item));
1602           if (itemBbox) {
1603               simplifySize      = L2(itemBbox->dimensions());
1604           } else {
1605               simplifySize      = 0;
1606           }
1607       }
1608
1609       pathsSimplified++;
1610
1611       if (pathsSimplified % 20 == 0) {
1612         gchar *message = g_strdup_printf(_("%s <b>%d</b> of <b>%d</b> paths simplified..."), simplificationType, pathsSimplified, totalPathCount);
1613         desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, message);
1614       }
1615
1616       didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1617                           threshold, justCoalesce, angleLimit, breakableAngles, simplifySize, modifySelection);
1618   }
1619
1620   desktop->clearWaitingCursor();
1621
1622   if (pathsSimplified > 20) {
1623     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, g_strdup_printf(_("<b>%d</b> paths simplified."), pathsSimplified));
1624   }
1625
1626   return didSomething;
1627 }
1628
1629 void
1630 sp_selected_path_simplify_selection(float threshold, bool justCoalesce,
1631                        float angleLimit, bool breakableAngles)
1632 {
1633     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1634
1635     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1636
1637     if (selection->isEmpty()) {
1638         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1639                          _("Select <b>path(s)</b> to simplify."));
1640         return;
1641     }
1642
1643     GSList *items = g_slist_copy((GSList *) selection->itemList());
1644
1645     bool didSomething = sp_selected_path_simplify_items(desktop, selection,
1646                                                         items, threshold,
1647                                                         justCoalesce,
1648                                                         angleLimit,
1649                                                         breakableAngles, true);
1650
1651     if (didSomething)
1652         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_SIMPLIFY,
1653                          _("Simplify"));
1654     else
1655         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1656
1657 }
1658
1659
1660 // globals for keeping track of accelerated simplify
1661 static double previousTime      = 0.0;
1662 static gdouble simplifyMultiply = 1.0;
1663
1664 void
1665 sp_selected_path_simplify(void)
1666 {
1667     gdouble simplifyThreshold =
1668         prefs_get_double_attribute("options.simplifythreshold", "value", 0.003);
1669     bool simplifyJustCoalesce =
1670         (bool) prefs_get_int_attribute("options.simplifyjustcoalesce", "value", 0);
1671
1672     //Get the current time
1673     GTimeVal currentTimeVal;
1674     g_get_current_time(&currentTimeVal);
1675     double currentTime = currentTimeVal.tv_sec * 1000000 +
1676                 currentTimeVal.tv_usec;
1677
1678     //Was the previous call to this function recent? (<0.5 sec)
1679     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1680
1681         // add to the threshold 1/2 of its original value
1682         simplifyMultiply  += 0.5;
1683         simplifyThreshold *= simplifyMultiply;
1684
1685     } else {
1686         // reset to the default
1687         simplifyMultiply = 1;
1688     }
1689
1690     //remember time for next call
1691     previousTime = currentTime;
1692
1693     //g_print("%g\n", simplify_threshold);
1694
1695     //Make the actual call
1696     sp_selected_path_simplify_selection(simplifyThreshold,
1697                       simplifyJustCoalesce, 0.0, false);
1698 }
1699
1700
1701
1702 // fonctions utilitaires
1703
1704 bool
1705 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1706 {
1707     if (who == NULL || a == NULL)
1708         return false;
1709     if (who == a)
1710         return true;
1711     return Ancetre(sp_repr_parent(a), who);
1712 }
1713
1714 Path *
1715 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1716 {
1717     SPCurve *curve = curve_for_item(item);
1718     NArtBpath *bpath = bpath_for_curve(item, curve, doTransformation, transformFull);
1719
1720     if (bpath == NULL) {
1721         return NULL;
1722     }
1723
1724     Path *dest = bpath_to_Path(bpath);
1725
1726     if (doTransformation) {
1727         g_free(bpath); // see comment in bpath_for_curve
1728     }
1729
1730     sp_curve_unref(curve);
1731
1732     return dest;
1733 }
1734
1735 NArtBpath *
1736 bpath_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull)
1737 {
1738     if (curve == NULL)
1739         return NULL;
1740
1741     NArtBpath *bpath = SP_CURVE_BPATH(curve);
1742     if (bpath == NULL) {
1743         return NULL;
1744     }
1745
1746     if (doTransformation) {
1747         NArtBpath *new_bpath; // we will get a duplicate which has to be freed at some point!
1748         if (transformFull) {
1749             new_bpath = nr_artpath_affine(bpath, sp_item_i2doc_affine(item));
1750         } else {
1751             new_bpath = nr_artpath_affine(bpath, item->transform);
1752         }
1753         bpath = new_bpath;
1754     }
1755
1756     return bpath;
1757 }
1758
1759 SPCurve* curve_for_item(SPItem *item)
1760 {
1761     if (!item)
1762         return NULL;
1763
1764     SPCurve *curve = NULL;
1765
1766     if (SP_IS_SHAPE(item)) {
1767         if (SP_IS_PATH(item)) {
1768             curve = sp_path_get_curve_for_edit(SP_PATH(item));
1769         } else {
1770             curve = sp_shape_get_curve(SP_SHAPE(item));
1771         }
1772     }
1773     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item))
1774     {
1775         curve = te_get_layout(item)->convertToCurves();
1776     }
1777     else if (SP_IS_IMAGE(item))
1778     {
1779         curve = sp_image_get_curve(SP_IMAGE(item));
1780     }
1781
1782     return curve; // do not forget to unref the curve at some point!
1783 }
1784
1785 Path *bpath_to_Path(NArtBpath const *bpath) {
1786     Path *dest = new Path;
1787     dest->SetBackData(false);
1788     {
1789         int   i;
1790         bool  closed = false;
1791         float lastX  = 0.0;
1792         float lastY  = 0.0;
1793
1794         for (i = 0; bpath[i].code != NR_END; i++) {
1795             switch (bpath[i].code) {
1796                 case NR_LINETO:
1797                     lastX = bpath[i].x3;
1798                     lastY = bpath[i].y3;
1799                     {
1800                         NR::Point tmp(lastX, lastY);
1801                         dest->LineTo(tmp);
1802                     }
1803                     break;
1804
1805                 case NR_CURVETO:
1806                 {
1807                     NR::Point tmp, tms, tme;
1808                     tmp[0]=bpath[i].x3;
1809                     tmp[1]=bpath[i].y3;
1810                     tms[0]=3 * (bpath[i].x1 - lastX);
1811                     tms[1]=3 * (bpath[i].y1 - lastY);
1812                     tme[0]=3 * (bpath[i].x3 - bpath[i].x2);
1813                     tme[1]=3 * (bpath[i].y3 - bpath[i].y2);
1814                     dest->CubicTo(tmp,tms,tme);
1815                 }
1816                 lastX = bpath[i].x3;
1817                 lastY = bpath[i].y3;
1818                 break;
1819
1820                 case NR_MOVETO_OPEN:
1821                 case NR_MOVETO:
1822                     if (closed)
1823                         dest->Close();
1824                     closed = (bpath[i].code == NR_MOVETO);
1825                     lastX = bpath[i].x3;
1826                     lastY = bpath[i].y3;
1827                     {
1828                         NR::Point  tmp(lastX, lastY);
1829                         dest->MoveTo(tmp);
1830                     }
1831                     break;
1832                 default:
1833                     break;
1834             }
1835         }
1836         if (closed)
1837             dest->Close();
1838     }
1839     return dest;
1840 }
1841
1842 NR::Maybe<Path::cut_position> get_nearest_position_on_Path(Path *path, NR::Point p, unsigned seg)
1843 {
1844     //get nearest position on path
1845     Path::cut_position pos = path->PointToCurvilignPosition(p, seg);
1846     return pos;
1847 }
1848
1849 NR::Point get_point_on_Path(Path *path, int piece, double t)
1850 {
1851     NR::Point p;
1852     path->PointAt(piece, t, p);
1853     return p;
1854 }
1855
1856
1857 /*
1858   Local Variables:
1859   mode:c++
1860   c-file-style:"stroustrup"
1861   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1862   indent-tabs-mode:nil
1863   fill-column:99
1864   End:
1865 */
1866 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :