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 <vector>
  21 #include <glib/gmem.h>
  22 #include "xml/repr.h"
  23 #include "svg/svg.h"
  24 #include "sp-path.h"
  25 #include "sp-shape.h"
  26 #include "sp-image.h"
  27 #include "marker.h"
  28 #include "enums.h"
  29 #include "sp-text.h"
  30 #include "sp-item-group.h"
  31 #include "style.h"
  32 #include "inkscape.h"
  33 #include "document.h"
  34 #include "message-stack.h"
  35 #include "selection.h"
  36 #include "desktop-handles.h"
  37 #include "desktop.h"
  38 #include "display/canvas-bpath.h"
  39 #include "display/curve.h"
  40 #include <glibmm/i18n.h>
  41 #include "prefs-utils.h"
  42
  43 #include "libnr/n-art-bpath.h"
  44 #include "libnr/nr-path.h"
  45 #include "xml/repr.h"
  46 #include "xml/repr-sorting.h"
  47
  48 #include <libnr/nr-matrix-fns.h>
  49 #include <libnr/nr-matrix-ops.h>
  50 #include <libnr/nr-matrix-translate-ops.h>
  51 #include <libnr/nr-scale-matrix-ops.h>
  52
  53 #include "livarot/Path.h"
  54 #include "livarot/Shape.h"
  55
  56 #include "splivarot.h"
  57
  58 bool   Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who);
  59
  60 void sp_selected_path_boolop(bool_op bop, const unsigned int verb=SP_VERB_NONE, const Glib::ustring description="");
  61 void sp_selected_path_do_offset(bool expand, double prefOffset);
  62 void sp_selected_path_create_offset_object(int expand, bool updating);
  63
  64 void
  65 sp_selected_path_union()
  66 {
  67     sp_selected_path_boolop(bool_op_union, SP_VERB_SELECTION_UNION, _("Union"));
  68 }
  69
  70 void
  71 sp_selected_path_union_skip_undo()
  72 {
  73     sp_selected_path_boolop(bool_op_union, SP_VERB_NONE, _("Union"));
  74 }
  75
  76 void
  77 sp_selected_path_intersect()
  78 {
  79     sp_selected_path_boolop(bool_op_inters, SP_VERB_SELECTION_INTERSECT, _("Intersection"));
  80 }
  81
  82 void
  83 sp_selected_path_diff()
  84 {
  85     sp_selected_path_boolop(bool_op_diff, SP_VERB_SELECTION_DIFF, _("Difference"));
  86 }
  87
  88 void
  89 sp_selected_path_symdiff()
  90 {
  91     sp_selected_path_boolop(bool_op_symdiff, SP_VERB_SELECTION_SYMDIFF, _("Exclusion"));
  92 }
  93 void
  94 sp_selected_path_cut()
  95 {
  96     sp_selected_path_boolop(bool_op_cut, SP_VERB_SELECTION_CUT, _("Division"));
  97 }
  98 void
  99 sp_selected_path_slice()
 100 {
 101     sp_selected_path_boolop(bool_op_slice, SP_VERB_SELECTION_SLICE,  _("Cut path"));
 102 }
 103
 104
 105 // boolean operations
 106 // take the source paths from the file, do the operation, delete the originals and add the results
 107 void
 108 sp_selected_path_boolop(bool_op bop, const unsigned int verb, const Glib::ustring description)
 109 {
 110     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 111
 112     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 113
 114     GSList *il = (GSList *) selection->itemList();
 115
 116     // allow union on a single object for the purpose of removing self overlapse (svn log, revision 13334)
 117     if ( (g_slist_length(il) < 2) && (bop != bool_op_union)) {
 118         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 2 paths</b> to perform a boolean operation."));
 119         return;
 120     }
 121     else if ( g_slist_length(il) < 1 ) {
 122         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 1 path</b> to perform a boolean union."));
 123         return;
 124     }
 125
 126     if (g_slist_length(il) > 2) {
 127         if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 128             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>exactly 2 paths</b> to perform difference, XOR, division, or path cut."));
 129             return;
 130         }
 131     }
 132
 133     // reverseOrderForOp marks whether the order of the list is the top->down order
 134     // it's only used when there are 2 objects, and for operations who need to know the
 135     // topmost object (differences, cuts)
 136     bool reverseOrderForOp = false;
 137
 138     // mettre les elements de la liste dans l'ordre pour ces operations
 139     if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice) {
 140         // check in the tree to find which element of the selection list is topmost (for 2-operand commands only)
 141         Inkscape::XML::Node *a = SP_OBJECT_REPR(il->data);
 142         Inkscape::XML::Node *b = SP_OBJECT_REPR(il->next->data);
 143
 144         if (a == NULL || b == NULL) {
 145             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."));
 146             return;
 147         }
 148
 149         if (Ancetre(a, b)) {
 150             // a is the parent of b, already in the proper order
 151         } else if (Ancetre(b, a)) {
 152             // reverse order
 153             reverseOrderForOp = true;
 154         } else {
 155
 156             // objects are not in parent/child relationship;
 157             // find their lowest common ancestor
 158             Inkscape::XML::Node *dad = LCA(a, b);
 159             if (dad == NULL) {
 160                 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."));
 161                 return;
 162             }
 163
 164             // find the children of the LCA that lead from it to the a and b
 165             Inkscape::XML::Node *as = AncetreFils(a, dad);
 166             Inkscape::XML::Node *bs = AncetreFils(b, dad);
 167
 168             // find out which comes first
 169             for (Inkscape::XML::Node *child = dad->firstChild(); child; child = child->next()) {
 170                 if (child == as) {
 171                     /* a first, so reverse. */
 172                     reverseOrderForOp = true;
 173                     break;
 174                 }
 175                 if (child == bs)
 176                     break;
 177             }
 178         }
 179     }
 180
 181     il = g_slist_copy(il);
 182
 183     // first check if all the input objects have shapes
 184     // otherwise bail out
 185     for (GSList *l = il; l != NULL; l = l->next)
 186     {
 187         SPItem *item = SP_ITEM(l->data);
 188         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 189         {
 190             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("One of the objects is <b>not a path</b>, cannot perform boolean operation."));
 191             g_slist_free(il);
 192             return;
 193         }
 194     }
 195
 196     // extract the livarot Paths from the source objects
 197     // also get the winding rule specified in the style
 198     int nbOriginaux = g_slist_length(il);
 199     std::vector<Path *> originaux(nbOriginaux);
 200     std::vector<FillRule> origWind(nbOriginaux);
 201     int curOrig;
 202     {
 203         curOrig = 0;
 204         for (GSList *l = il; l != NULL; l = l->next)
 205         {
 206             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(il->data), "style");
 207             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 208             if (val && strcmp(val, "nonzero") == 0) {
 209                 origWind[curOrig]= fill_nonZero;
 210             } else if (val && strcmp(val, "evenodd") == 0) {
 211                 origWind[curOrig]= fill_oddEven;
 212             } else {
 213                 origWind[curOrig]= fill_nonZero;
 214             }
 215
 216             originaux[curOrig] = Path_for_item((SPItem *) l->data, true, true);
 217             if (originaux[curOrig] == NULL || originaux[curOrig]->descr_cmd.size() <= 1)
 218             {
 219                 for (int i = curOrig; i >= 0; i--) delete originaux[i];
 220                 g_slist_free(il);
 221                 return;
 222             }
 223             curOrig++;
 224         }
 225     }
 226     // reverse if needed
 227     // note that the selection list keeps its order
 228     if ( reverseOrderForOp ) {
 229         Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 230         FillRule swai=origWind[0]; origWind[0]=origWind[1]; origWind[1]=swai;
 231     }
 232
 233     // and work
 234     // some temporary instances, first
 235     Shape *theShapeA = new Shape;
 236     Shape *theShapeB = new Shape;
 237     Shape *theShape = new Shape;
 238     Path *res = new Path;
 239     res->SetBackData(false);
 240     Path::cut_position  *toCut=NULL;
 241     int                  nbToCut=0;
 242
 243     if ( bop == bool_op_inters || bop == bool_op_union || bop == bool_op_diff || bop == bool_op_symdiff ) {
 244         // true boolean op
 245         // get the polygons of each path, with the winding rule specified, and apply the operation iteratively
 246         originaux[0]->ConvertWithBackData(0.1);
 247
 248         originaux[0]->Fill(theShape, 0);
 249
 250         theShapeA->ConvertToShape(theShape, origWind[0]);
 251
 252         curOrig = 1;
 253         for (GSList *l = il->next; l != NULL; l = l->next) {
 254             originaux[curOrig]->ConvertWithBackData(0.1);
 255
 256             originaux[curOrig]->Fill(theShape, curOrig);
 257
 258             theShapeB->ConvertToShape(theShape, origWind[curOrig]);
 259
 260             // les elements arrivent en ordre inverse dans la liste
 261             theShape->Booleen(theShapeB, theShapeA, bop);
 262
 263             {
 264                 Shape *swap = theShape;
 265                 theShape = theShapeA;
 266                 theShapeA = swap;
 267             }
 268             curOrig++;
 269         }
 270
 271         {
 272             Shape *swap = theShape;
 273             theShape = theShapeA;
 274             theShapeA = swap;
 275         }
 276
 277     } else if ( bop == bool_op_cut ) {
 278         // cuts= sort of a bastard boolean operation, thus not the axact same modus operandi
 279         // technically, the cut path is not necessarily a polygon (thus has no winding rule)
 280         // it is just uncrossed, and cleaned from duplicate edges and points
 281         // then it's fed to Booleen() which will uncross it against the other path
 282         // then comes the trick: each edge of the cut path is duplicated (one in each direction),
 283         // thus making a polygon. the weight of the edges of the cut are all 0, but
 284         // the Booleen need to invert the ones inside the source polygon (for the subsequent
 285         // ConvertToForme)
 286
 287         // the cut path needs to have the highest pathID in the back data
 288         // that's how the Booleen() function knows it's an edge of the cut
 289
 290         // FIXME: this gives poor results, the final paths are full of extraneous nodes. Decreasing
 291         // ConvertWithBackData parameter below simply increases the number of nodes, so for now I
 292         // left it at 1.0. Investigate replacing this by a combination of difference and
 293         // intersection of the same two paths. -- bb
 294         {
 295             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 296             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 297         }
 298         originaux[0]->ConvertWithBackData(1.0);
 299
 300         originaux[0]->Fill(theShape, 0);
 301
 302         theShapeA->ConvertToShape(theShape, origWind[0]);
 303
 304         originaux[1]->ConvertWithBackData(1.0);
 305
 306         originaux[1]->Fill(theShape, 1,false,false,false); //do not closeIfNeeded
 307
 308         theShapeB->ConvertToShape(theShape, fill_justDont); // fill_justDont doesn't computes winding numbers
 309
 310         // les elements arrivent en ordre inverse dans la liste
 311         theShape->Booleen(theShapeB, theShapeA, bool_op_cut, 1);
 312
 313     } else if ( bop == bool_op_slice ) {
 314         // slice is not really a boolean operation
 315         // you just put the 2 shapes in a single polygon, uncross it
 316         // the points where the degree is > 2 are intersections
 317         // just check it's an intersection on the path you want to cut, and keep it
 318         // the intersections you have found are then fed to ConvertPositionsToMoveTo() which will
 319         // make new subpath at each one of these positions
 320         // inversion pour l'op\8eration
 321         {
 322             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 323             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 324         }
 325         originaux[0]->ConvertWithBackData(1.0);
 326
 327         originaux[0]->Fill(theShapeA, 0,false,false,false); // don't closeIfNeeded
 328
 329         originaux[1]->ConvertWithBackData(1.0);
 330
 331         originaux[1]->Fill(theShapeA, 1,true,false,false);// don't closeIfNeeded and just dump in the shape, don't reset it
 332
 333         theShape->ConvertToShape(theShapeA, fill_justDont);
 334
 335         if ( theShape->hasBackData() ) {
 336             // should always be the case, but ya never know
 337             {
 338                 for (int i = 0; i < theShape->numberOfPoints(); i++) {
 339                     if ( theShape->getPoint(i).totalDegree() > 2 ) {
 340                         // possibly an intersection
 341                         // we need to check that at least one edge from the source path is incident to it
 342                         // before we declare it's an intersection
 343                         int cb = theShape->getPoint(i).incidentEdge[FIRST];
 344                         int   nbOrig=0;
 345                         int   nbOther=0;
 346                         int   piece=-1;
 347                         float t=0.0;
 348                         while ( cb >= 0 && cb < theShape->numberOfEdges() ) {
 349                             if ( theShape->ebData[cb].pathID == 0 ) {
 350                                 // the source has an edge incident to the point, get its position on the path
 351                                 piece=theShape->ebData[cb].pieceID;
 352                                 if ( theShape->getEdge(cb).st == i ) {
 353                                     t=theShape->ebData[cb].tSt;
 354                                 } else {
 355                                     t=theShape->ebData[cb].tEn;
 356                                 }
 357                                 nbOrig++;
 358                             }
 359                             if ( theShape->ebData[cb].pathID == 1 ) nbOther++; // the cut is incident to this point
 360                             cb=theShape->NextAt(i, cb);
 361                         }
 362                         if ( nbOrig > 0 && nbOther > 0 ) {
 363                             // point incident to both path and cut: an intersection
 364                             // note that you only keep one position on the source; you could have degenerate
 365                             // cases where the source crosses itself at this point, and you wouyld miss an intersection
 366                             toCut=(Path::cut_position*)realloc(toCut, (nbToCut+1)*sizeof(Path::cut_position));
 367                             toCut[nbToCut].piece=piece;
 368                             toCut[nbToCut].t=t;
 369                             nbToCut++;
 370                         }
 371                     }
 372                 }
 373             }
 374             {
 375                 // i think it's useless now
 376                 int i = theShape->numberOfEdges() - 1;
 377                 for (;i>=0;i--) {
 378                     if ( theShape->ebData[i].pathID == 1 ) {
 379                         theShape->SubEdge(i);
 380                     }
 381                 }
 382             }
 383
 384         }
 385     }
 386
 387     int*    nesting=NULL;
 388     int*    conts=NULL;
 389     int     nbNest=0;
 390     // pour compenser le swap juste avant
 391     if ( bop == bool_op_slice ) {
 392 //    theShape->ConvertToForme(res, nbOriginaux, originaux, true);
 393 //    res->ConvertForcedToMoveTo();
 394         res->Copy(originaux[0]);
 395         res->ConvertPositionsToMoveTo(nbToCut, toCut); // cut where you found intersections
 396         free(toCut);
 397     } else if ( bop == bool_op_cut ) {
 398         // il faut appeler pour desallouer PointData (pas vital, mais bon)
 399         // the Booleen() function did not deallocated the point_data array in theShape, because this
 400         // function needs it.
 401         // this function uses the point_data to get the winding number of each path (ie: is a hole or not)
 402         // for later reconstruction in objects, you also need to extract which path is parent of holes (nesting info)
 403         theShape->ConvertToFormeNested(res, nbOriginaux, &originaux[0], 1, nbNest, nesting, conts);
 404     } else {
 405         theShape->ConvertToForme(res, nbOriginaux, &originaux[0]);
 406     }
 407
 408     delete theShape;
 409     delete theShapeA;
 410     delete theShapeB;
 411     for (int i = 0; i < nbOriginaux; i++)  delete originaux[i];
 412
 413     if (res->descr_cmd.size() <= 1)
 414     {
 415         // only one command, presumably a moveto: it isn't a path
 416         for (GSList *l = il; l != NULL; l = l->next)
 417         {
 418             SP_OBJECT(l->data)->deleteObject();
 419         }
 420         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 421                          description);
 422         selection->clear();
 423
 424         delete res;
 425         g_slist_free(il);
 426         return;
 427     }
 428
 429     // get the source path object
 430     SPObject *source;
 431     if ( bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 432         if (reverseOrderForOp) {
 433              source = SP_OBJECT(il->data);
 434         } else {
 435              source = SP_OBJECT(il->next->data);
 436         }
 437     } else {
 438         // find out the bottom object
 439         GSList *sorted = g_slist_copy((GSList *) selection->reprList());
 440
 441         sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
 442
 443         source = sp_desktop_document(desktop)->
 444             getObjectByRepr((Inkscape::XML::Node *)sorted->data);
 445
 446         g_slist_free(sorted);
 447     }
 448
 449     // adjust style properties that depend on a possible transform in the source object in order
 450     // to get a correct style attribute for the new path
 451     SPItem* item_source = SP_ITEM(source);
 452     NR::Matrix i2root = sp_item_i2root_affine(item_source);
 453     sp_item_adjust_stroke(item_source, i2root.expansion());
 454     sp_item_adjust_pattern(item_source, i2root);
 455     sp_item_adjust_gradient(item_source, i2root);
 456
 457     Inkscape::XML::Node *repr_source = SP_OBJECT_REPR(source);
 458
 459     // remember important aspects of the source path, to be restored
 460     gint pos = repr_source->position();
 461     Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
 462     gchar const *id = repr_source->attribute("id");
 463     gchar const *style = repr_source->attribute("style");
 464     gchar const *mask = repr_source->attribute("mask");
 465     gchar const *clip_path = repr_source->attribute("clip-path");
 466
 467     // remove source paths
 468     selection->clear();
 469     for (GSList *l = il; l != NULL; l = l->next) {
 470         // if this is the bottommost object,
 471         if (!strcmp(SP_OBJECT_REPR(l->data)->attribute("id"), id)) {
 472             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 473             SP_OBJECT(l->data)->deleteObject(false);
 474         } else {
 475             // delete the object for real, so that its clones can take appropriate action
 476             SP_OBJECT(l->data)->deleteObject();
 477         }
 478     }
 479     g_slist_free(il);
 480
 481     // premultiply by the inverse of parent's repr
 482     SPItem *parent_item = SP_ITEM(sp_desktop_document(desktop)->getObjectByRepr(parent));
 483     NR::Matrix local = sp_item_i2doc_affine(parent_item);
 484     gchar *transform = sp_svg_transform_write(local.inverse());
 485
 486     // now that we have the result, add it on the canvas
 487     if ( bop == bool_op_cut || bop == bool_op_slice ) {
 488         int    nbRP=0;
 489         Path** resPath;
 490         if ( bop == bool_op_slice ) {
 491             // there are moveto's at each intersection, but it's still one unique path
 492             // so break it down and add each subpath independently
 493             // we could call break_apart to do this, but while we have the description...
 494             resPath=res->SubPaths(nbRP, false);
 495         } else {
 496             // cut operation is a bit wicked: you need to keep holes
 497             // that's why you needed the nesting
 498             // ConvertToFormeNested() dumped all the subpath in a single Path "res", so we need
 499             // to get the path for each part of the polygon. that's why you need the nesting info:
 500             // to know in wich subpath to add a subpath
 501             resPath=res->SubPathsWithNesting(nbRP, true, nbNest, nesting, conts);
 502
 503             // cleaning
 504             if ( conts ) free(conts);
 505             if ( nesting ) free(nesting);
 506         }
 507
 508         // add all the pieces resulting from cut or slice
 509         for (int i=0;i<nbRP;i++) {
 510             gchar *d = resPath[i]->svg_dump_path();
 511
 512             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 513             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 514             repr->setAttribute("style", style);
 515             if (mask)
 516                 repr->setAttribute("mask", mask);
 517             if (clip_path)
 518                 repr->setAttribute("clip-path", clip_path);
 519
 520             repr->setAttribute("d", d);
 521             g_free(d);
 522
 523             // for slice, remove fill
 524             if (bop == bool_op_slice) {
 525                 SPCSSAttr *css;
 526
 527                 css = sp_repr_css_attr_new();
 528                 sp_repr_css_set_property(css, "fill", "none");
 529
 530                 sp_repr_css_change(repr, css, "style");
 531
 532                 sp_repr_css_attr_unref(css);
 533             }
 534
 535             // we assign the same id on all pieces, but it on adding to document, it will be changed on all except one
 536             // this means it's basically random which of the pieces inherits the original's id and clones
 537             // a better algorithm might figure out e.g. the biggest piece
 538             repr->setAttribute("id", id);
 539
 540             repr->setAttribute("transform", transform);
 541
 542             // add the new repr to the parent
 543             parent->appendChild(repr);
 544
 545             // move to the saved position
 546             repr->setPosition(pos > 0 ? pos : 0);
 547
 548             selection->add(repr);
 549             Inkscape::GC::release(repr);
 550
 551             delete resPath[i];
 552         }
 553         if ( resPath ) free(resPath);
 554
 555     } else {
 556         gchar *d = res->svg_dump_path();
 557
 558         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 559         Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 560         repr->setAttribute("style", style);
 561
 562         if ( mask )
 563             repr->setAttribute("mask", mask);
 564
 565         if ( clip_path )
 566             repr->setAttribute("clip-path", clip_path);
 567
 568         repr->setAttribute("d", d);
 569         g_free(d);
 570
 571         repr->setAttribute("transform", transform);
 572
 573         repr->setAttribute("id", id);
 574         parent->appendChild(repr);
 575         repr->setPosition(pos > 0 ? pos : 0);
 576
 577         selection->add(repr);
 578         Inkscape::GC::release(repr);
 579     }
 580
 581     g_free(transform);
 582
 583     if (verb != SP_VERB_NONE) {
 584         sp_document_done(sp_desktop_document(desktop), verb, description);
 585     }
 586
 587     delete res;
 588 }
 589
 590
 591 void
 592 sp_selected_path_outline()
 593 {
 594     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 595
 596     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 597
 598     if (selection->isEmpty()) {
 599         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>stroked path(s)</b> to convert stroke to path."));
 600         return;
 601     }
 602
 603     bool did = false;
 604
 605     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 606          items != NULL;
 607          items = items->next) {
 608
 609         SPItem *item = (SPItem *) items->data;
 610
 611         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 612             continue;
 613
 614         SPCurve *curve = NULL;
 615         if (SP_IS_SHAPE(item)) {
 616             curve = sp_shape_get_curve(SP_SHAPE(item));
 617             if (curve == NULL)
 618                 continue;
 619         }
 620         if (SP_IS_TEXT(item)) {
 621             curve = SP_TEXT(item)->getNormalizedBpath();
 622             if (curve == NULL)
 623                 continue;
 624         }
 625
 626         {   // pas de stroke pas de chocolat
 627             SPCSSAttr *css = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 628             gchar const *val = sp_repr_css_property(css, "stroke", NULL);
 629
 630             if (val == NULL || strcmp(val, "none") == 0) {
 631                 sp_curve_unref(curve);
 632                 continue;
 633             }
 634         }
 635
 636         // remember old stroke style, to be set on fill
 637         SPCSSAttr *ncss;
 638         {
 639             SPCSSAttr *ocss = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 640             gchar const *val = sp_repr_css_property(ocss, "stroke", NULL);
 641             gchar const *opac = sp_repr_css_property(ocss, "stroke-opacity", NULL);
 642
 643             ncss = sp_repr_css_attr_new();
 644
 645             sp_repr_css_set_property(ncss, "stroke", "none");
 646             sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
 647             sp_repr_css_set_property(ncss, "fill", val);
 648             if ( opac ) {
 649                 sp_repr_css_set_property(ncss, "fill-opacity", opac);
 650             } else {
 651                 sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
 652             }
 653             sp_repr_css_unset_property(ncss, "marker-start");
 654             sp_repr_css_unset_property(ncss, "marker-mid");
 655             sp_repr_css_unset_property(ncss, "marker-end");
 656         }
 657
 658         NR::Matrix const transform(item->transform);
 659         float const scale = transform.expansion();
 660         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
 661         SPStyle *i_style = SP_OBJECT(item)->style;
 662         gchar const *mask = SP_OBJECT_REPR(item)->attribute("mask");
 663         gchar const *clip_path = SP_OBJECT_REPR(item)->attribute("clip-path");
 664
 665         float o_width, o_miter;
 666         JoinType o_join;
 667         ButtType o_butt;
 668
 669         {
 670             int jointype, captype;
 671
 672             jointype = i_style->stroke_linejoin.computed;
 673             captype = i_style->stroke_linecap.computed;
 674             o_width = i_style->stroke_width.computed;
 675
 676             switch (jointype) {
 677                 case SP_STROKE_LINEJOIN_MITER:
 678                     o_join = join_pointy;
 679                     break;
 680                 case SP_STROKE_LINEJOIN_ROUND:
 681                     o_join = join_round;
 682                     break;
 683                 default:
 684                     o_join = join_straight;
 685                     break;
 686             }
 687
 688             switch (captype) {
 689                 case SP_STROKE_LINECAP_SQUARE:
 690                     o_butt = butt_square;
 691                     break;
 692                 case SP_STROKE_LINECAP_ROUND:
 693                     o_butt = butt_round;
 694                     break;
 695                 default:
 696                     o_butt = butt_straight;
 697                     break;
 698             }
 699
 700             if (o_width < 0.1)
 701                 o_width = 0.1;
 702             o_miter = i_style->stroke_miterlimit.value * o_width;
 703         }
 704
 705         Path *orig = Path_for_item(item, false);
 706         if (orig == NULL) {
 707             g_free(style);
 708             sp_curve_unref(curve);
 709             continue;
 710         }
 711
 712         Path *res = new Path;
 713         res->SetBackData(false);
 714
 715         if (i_style->stroke_dash.n_dash) {
 716             // For dashed strokes, use Stroke method, because Outline can't do dashes
 717             // However Stroke adds lots of extra nodes _or_ makes the path crooked, so consider this a temporary workaround
 718
 719             orig->ConvertWithBackData(0.1);
 720
 721             orig->DashPolylineFromStyle(i_style, scale, 0);
 722
 723             Shape* theShape = new Shape;
 724             orig->Stroke(theShape, false, 0.5*o_width, o_join, o_butt,
 725                          0.5 * o_miter);
 726             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 727
 728             Shape *theRes = new Shape;
 729
 730             theRes->ConvertToShape(theShape, fill_positive);
 731
 732             Path *originaux[1];
 733             originaux[0] = res;
 734             theRes->ConvertToForme(orig, 1, originaux);
 735
 736             res->Coalesce(5.0);
 737
 738             delete theShape;
 739             delete theRes;
 740
 741         } else {
 742
 743             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 744
 745             orig->Coalesce(0.5 * o_width);
 746
 747             Shape *theShape = new Shape;
 748             Shape *theRes = new Shape;
 749
 750             res->ConvertWithBackData(1.0);
 751             res->Fill(theShape, 0);
 752             theRes->ConvertToShape(theShape, fill_positive);
 753
 754             Path *originaux[1];
 755             originaux[0] = res;
 756             theRes->ConvertToForme(orig, 1, originaux);
 757
 758             delete theShape;
 759             delete theRes;
 760         }
 761
 762         if (orig->descr_cmd.size() <= 1) {
 763             // ca a merd\8e, ou bien le resultat est vide
 764             delete res;
 765             delete orig;
 766             g_free(style);
 767             continue;
 768         }
 769
 770         did = true;
 771
 772         // remember the position of the item
 773         gint pos = SP_OBJECT_REPR(item)->position();
 774         // remember parent
 775         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 776         // remember id
 777         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 778
 779         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
 780
 781             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 782             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 783
 784             // restore old style
 785             repr->setAttribute("style", style);
 786
 787             // set old stroke style on fill
 788             sp_repr_css_change(repr, ncss, "style");
 789
 790             sp_repr_css_attr_unref(ncss);
 791
 792             gchar *str = orig->svg_dump_path();
 793             repr->setAttribute("d", str);
 794             g_free(str);
 795
 796             if (mask)
 797                 repr->setAttribute("mask", mask);
 798             if (clip_path)
 799                 repr->setAttribute("clip-path", clip_path);
 800
 801             if (SP_IS_SHAPE(item) && sp_shape_has_markers (SP_SHAPE(item))) {
 802
 803                 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 804                 Inkscape::XML::Node *g_repr = xml_doc->createElement("svg:g");
 805
 806                 // add the group to the parent
 807                 parent->appendChild(g_repr);
 808                 // move to the saved position
 809                 g_repr->setPosition(pos > 0 ? pos : 0);
 810
 811                 g_repr->appendChild(repr);
 812                 repr->setAttribute("id", id);
 813                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 814                 sp_item_write_transform(newitem, repr, transform);
 815
 816                 SPShape *shape = SP_SHAPE(item);
 817
 818                 for (NArtBpath* bp = SP_CURVE_BPATH(shape->curve); bp->code != NR_END; bp++) {
 819                     for (int m = SP_MARKER_LOC_START; m < SP_MARKER_LOC_QTY; m++) {
 820                         if (sp_shape_marker_required (shape, m, bp)) {
 821
 822                             SPMarker* marker = SP_MARKER (shape->marker[m]);
 823                             SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[m]));
 824
 825                             NR::Matrix tr(sp_shape_marker_get_transform(shape, bp));
 826
 827                             if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
 828                                 tr = NR::scale(i_style->stroke_width.computed) * tr;
 829                             }
 830
 831                             // total marker transform
 832                             tr = marker_item->transform * marker->c2p * tr * transform;
 833
 834                             if (SP_OBJECT_REPR(marker_item)) {
 835                                 Inkscape::XML::Node *m_repr = SP_OBJECT_REPR(marker_item)->duplicate(xml_doc);
 836                                 g_repr->appendChild(m_repr);
 837                                 SPItem *marker_item = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(m_repr);
 838                                 sp_item_write_transform(marker_item, m_repr, tr);
 839                             }
 840                         }
 841                     }
 842                 }
 843
 844
 845                 selection->add(g_repr);
 846
 847                 Inkscape::GC::release(g_repr);
 848
 849
 850             } else {
 851
 852                 // add the new repr to the parent
 853                 parent->appendChild(repr);
 854
 855                 // move to the saved position
 856                 repr->setPosition(pos > 0 ? pos : 0);
 857
 858                 repr->setAttribute("id", id);
 859
 860                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 861                 sp_item_write_transform(newitem, repr, transform);
 862
 863                 selection->add(repr);
 864
 865             }
 866
 867             Inkscape::GC::release(repr);
 868
 869             sp_curve_unref(curve);
 870             selection->remove(item);
 871             SP_OBJECT(item)->deleteObject(false);
 872
 873         }
 874
 875         delete res;
 876         delete orig;
 877         g_free(style);
 878
 879     }
 880
 881     if (did) {
 882         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_OUTLINE,
 883                          _("Convert stroke to path"));
 884     } else {
 885         // TRANSLATORS: "to outline" means "to convert stroke to path"
 886         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> in the selection."));
 887         return;
 888     }
 889 }
 890
 891
 892 void
 893 sp_selected_path_offset()
 894 {
 895     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 896
 897     sp_selected_path_do_offset(true, prefOffset);
 898 }
 899 void
 900 sp_selected_path_inset()
 901 {
 902     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 903
 904     sp_selected_path_do_offset(false, prefOffset);
 905 }
 906
 907 void
 908 sp_selected_path_offset_screen(double pixels)
 909 {
 910     sp_selected_path_do_offset(true,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 911 }
 912
 913 void
 914 sp_selected_path_inset_screen(double pixels)
 915 {
 916     sp_selected_path_do_offset(false,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 917 }
 918
 919
 920 void sp_selected_path_create_offset_object_zero()
 921 {
 922     sp_selected_path_create_offset_object(0, false);
 923 }
 924
 925 void sp_selected_path_create_offset()
 926 {
 927     sp_selected_path_create_offset_object(1, false);
 928 }
 929 void sp_selected_path_create_inset()
 930 {
 931     sp_selected_path_create_offset_object(-1, false);
 932 }
 933
 934 void sp_selected_path_create_updating_offset_object_zero()
 935 {
 936     sp_selected_path_create_offset_object(0, true);
 937 }
 938
 939 void sp_selected_path_create_updating_offset()
 940 {
 941     sp_selected_path_create_offset_object(1, true);
 942 }
 943 void sp_selected_path_create_updating_inset()
 944 {
 945     sp_selected_path_create_offset_object(-1, true);
 946 }
 947
 948 void
 949 sp_selected_path_create_offset_object(int expand, bool updating)
 950 {
 951     Inkscape::Selection *selection;
 952     Inkscape::XML::Node *repr;
 953     SPItem *item;
 954     SPCurve *curve;
 955     gchar *style, *str;
 956     SPDesktop *desktop;
 957     float o_width, o_miter;
 958     JoinType o_join;
 959     ButtType o_butt;
 960
 961     curve = NULL;
 962
 963     desktop = SP_ACTIVE_DESKTOP;
 964
 965     selection = sp_desktop_selection(desktop);
 966
 967     item = selection->singleItem();
 968
 969     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
 970         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
 971         return;
 972     }
 973     if (SP_IS_SHAPE(item))
 974     {
 975         curve = sp_shape_get_curve(SP_SHAPE(item));
 976         if (curve == NULL)
 977             return;
 978     }
 979     if (SP_IS_TEXT(item))
 980     {
 981         curve = SP_TEXT(item)->getNormalizedBpath();
 982         if (curve == NULL)
 983             return;
 984     }
 985
 986     NR::Matrix const transform(item->transform);
 987
 988     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
 989
 990     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
 991
 992     // remember the position of the item
 993     gint pos = SP_OBJECT_REPR(item)->position();
 994     // remember parent
 995     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 996
 997     {
 998         SPStyle *i_style = SP_OBJECT(item)->style;
 999         int jointype, captype;
1000
1001         jointype = i_style->stroke_linejoin.value;
1002         captype = i_style->stroke_linecap.value;
1003         o_width = i_style->stroke_width.computed;
1004         if (jointype == SP_STROKE_LINEJOIN_MITER)
1005         {
1006             o_join = join_pointy;
1007         }
1008         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
1009         {
1010             o_join = join_round;
1011         }
1012         else
1013         {
1014             o_join = join_straight;
1015         }
1016         if (captype == SP_STROKE_LINECAP_SQUARE)
1017         {
1018             o_butt = butt_square;
1019         }
1020         else if (captype == SP_STROKE_LINECAP_ROUND)
1021         {
1022             o_butt = butt_round;
1023         }
1024         else
1025         {
1026             o_butt = butt_straight;
1027         }
1028
1029         {
1030             double prefOffset = 1.0;
1031             prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", prefOffset);
1032             o_width = prefOffset;
1033         }
1034
1035         if (o_width < 0.01)
1036             o_width = 0.01;
1037         o_miter = i_style->stroke_miterlimit.value * o_width;
1038     }
1039
1040     Path *orig = Path_for_item(item, true, false);
1041     if (orig == NULL)
1042     {
1043         g_free(style);
1044         sp_curve_unref(curve);
1045         return;
1046     }
1047
1048     Path *res = new Path;
1049     res->SetBackData(false);
1050
1051     {
1052         Shape *theShape = new Shape;
1053         Shape *theRes = new Shape;
1054
1055         orig->ConvertWithBackData(1.0);
1056         orig->Fill(theShape, 0);
1057
1058         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1059         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1060         if (val && strcmp(val, "nonzero") == 0)
1061         {
1062             theRes->ConvertToShape(theShape, fill_nonZero);
1063         }
1064         else if (val && strcmp(val, "evenodd") == 0)
1065         {
1066             theRes->ConvertToShape(theShape, fill_oddEven);
1067         }
1068         else
1069         {
1070             theRes->ConvertToShape(theShape, fill_nonZero);
1071         }
1072
1073         Path *originaux[1];
1074         originaux[0] = orig;
1075         theRes->ConvertToForme(res, 1, originaux);
1076
1077         delete theShape;
1078         delete theRes;
1079     }
1080
1081     sp_curve_unref(curve);
1082
1083     if (res->descr_cmd.size() <= 1)
1084     {
1085         // pas vraiment de points sur le resultat
1086         // donc il ne reste rien
1087         sp_document_done(sp_desktop_document(desktop),
1088                          (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1089                           : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1090                          (updating ? _("Create linked offset")
1091                           : _("Create dynamic offset")));
1092         selection->clear();
1093
1094         delete res;
1095         delete orig;
1096         g_free(style);
1097         return;
1098     }
1099
1100     {
1101         gchar tstr[80];
1102
1103         tstr[79] = '\0';
1104
1105         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1106         repr = xml_doc->createElement("svg:path");
1107         repr->setAttribute("sodipodi:type", "inkscape:offset");
1108         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1109                                                           ? o_width
1110                                                           : expand < 0
1111                                                           ? -o_width
1112                                                           : 0 ));
1113
1114         str = res->svg_dump_path();
1115         repr->setAttribute("inkscape:original", str);
1116         g_free(str);
1117
1118         if ( updating ) {
1119             char const *id = SP_OBJECT(item)->repr->attribute("id");
1120             char const *uri = g_strdup_printf("#%s", id);
1121             repr->setAttribute("xlink:href", uri);
1122             g_free((void *) uri);
1123         } else {
1124             repr->setAttribute("inkscape:href", NULL);
1125         }
1126
1127         repr->setAttribute("style", style);
1128
1129         // add the new repr to the parent
1130         parent->appendChild(repr);
1131
1132         // move to the saved position
1133         repr->setPosition(pos > 0 ? pos : 0);
1134
1135         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1136
1137         if ( updating ) {
1138             // on conserve l'original
1139             // we reapply the transform to the original (offset will feel it)
1140             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1141         } else {
1142             // delete original, apply the transform to the offset
1143             SP_OBJECT(item)->deleteObject(false);
1144             sp_item_write_transform(nitem, repr, transform);
1145         }
1146
1147         // The object just created from a temporary repr is only a seed.
1148         // We need to invoke its write which will update its real repr (in particular adding d=)
1149         SP_OBJECT(nitem)->updateRepr();
1150
1151         Inkscape::GC::release(repr);
1152
1153         selection->set(nitem);
1154     }
1155
1156     sp_document_done(sp_desktop_document(desktop),
1157                      (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1158                       : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1159                      (updating ? _("Create linked offset")
1160                       : _("Create dynamic offset")));
1161
1162     delete res;
1163     delete orig;
1164
1165     g_free(style);
1166 }
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179 void
1180 sp_selected_path_do_offset(bool expand, double prefOffset)
1181 {
1182     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1183
1184     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1185
1186     if (selection->isEmpty()) {
1187         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1188         return;
1189     }
1190
1191     bool did = false;
1192
1193     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1194          items != NULL;
1195          items = items->next) {
1196
1197         SPItem *item = (SPItem *) items->data;
1198
1199         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1200             continue;
1201
1202         SPCurve *curve = NULL;
1203         if (SP_IS_SHAPE(item)) {
1204             curve = sp_shape_get_curve(SP_SHAPE(item));
1205             if (curve == NULL)
1206                 continue;
1207         }
1208         if (SP_IS_TEXT(item)) {
1209             curve = SP_TEXT(item)->getNormalizedBpath();
1210             if (curve == NULL)
1211                 continue;
1212         }
1213
1214         NR::Matrix const transform(item->transform);
1215
1216         sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1217
1218         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1219
1220         float o_width, o_miter;
1221         JoinType o_join;
1222         ButtType o_butt;
1223
1224         {
1225             SPStyle *i_style = SP_OBJECT(item)->style;
1226             int jointype, captype;
1227
1228             jointype = i_style->stroke_linejoin.value;
1229             captype = i_style->stroke_linecap.value;
1230             o_width = i_style->stroke_width.computed;
1231
1232             switch (jointype) {
1233                 case SP_STROKE_LINEJOIN_MITER:
1234                     o_join = join_pointy;
1235                     break;
1236                 case SP_STROKE_LINEJOIN_ROUND:
1237                     o_join = join_round;
1238                     break;
1239                 default:
1240                     o_join = join_straight;
1241                     break;
1242             }
1243
1244             switch (captype) {
1245                 case SP_STROKE_LINECAP_SQUARE:
1246                     o_butt = butt_square;
1247                     break;
1248                 case SP_STROKE_LINECAP_ROUND:
1249                     o_butt = butt_round;
1250                     break;
1251                 default:
1252                     o_butt = butt_straight;
1253                     break;
1254             }
1255
1256             o_width = prefOffset;
1257
1258             if (o_width < 0.1)
1259                 o_width = 0.1;
1260             o_miter = i_style->stroke_miterlimit.value * o_width;
1261         }
1262
1263         Path *orig = Path_for_item(item, false);
1264         if (orig == NULL) {
1265             g_free(style);
1266             sp_curve_unref(curve);
1267             continue;
1268         }
1269
1270         Path *res = new Path;
1271         res->SetBackData(false);
1272
1273         {
1274             Shape *theShape = new Shape;
1275             Shape *theRes = new Shape;
1276
1277             orig->ConvertWithBackData(0.03);
1278             orig->Fill(theShape, 0);
1279
1280             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1281             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1282             if (val && strcmp(val, "nonzero") == 0)
1283             {
1284                 theRes->ConvertToShape(theShape, fill_nonZero);
1285             }
1286             else if (val && strcmp(val, "evenodd") == 0)
1287             {
1288                 theRes->ConvertToShape(theShape, fill_oddEven);
1289             }
1290             else
1291             {
1292                 theRes->ConvertToShape(theShape, fill_nonZero);
1293             }
1294
1295             // et maintenant: offset
1296             // methode inexacte
1297 /*                      Path *originaux[1];
1298                         originaux[0] = orig;
1299                         theRes->ConvertToForme(res, 1, originaux);
1300
1301                         if (expand) {
1302                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1303                         } else {
1304                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1305                         }
1306
1307                         orig->ConvertWithBackData(1.0);
1308                         orig->Fill(theShape, 0);
1309                         theRes->ConvertToShape(theShape, fill_positive);
1310                         originaux[0] = orig;
1311                         theRes->ConvertToForme(res, 1, originaux);
1312
1313                         if (o_width >= 0.5) {
1314                         //     res->Coalesce(1.0);
1315                         res->ConvertEvenLines(1.0);
1316                         res->Simplify(1.0);
1317                         } else {
1318                         //      res->Coalesce(o_width);
1319                         res->ConvertEvenLines(1.0*o_width);
1320                         res->Simplify(1.0 * o_width);
1321                         }    */
1322             // methode par makeoffset
1323
1324             if (expand)
1325             {
1326                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1327             }
1328             else
1329             {
1330                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1331             }
1332             theRes->ConvertToShape(theShape, fill_positive);
1333
1334             res->Reset();
1335             theRes->ConvertToForme(res);
1336
1337             if (o_width >= 1.0)
1338             {
1339                 res->ConvertEvenLines(1.0);
1340                 res->Simplify(1.0);
1341             }
1342             else
1343             {
1344                 res->ConvertEvenLines(1.0*o_width);
1345                 res->Simplify(1.0 * o_width);
1346             }
1347
1348             delete theShape;
1349             delete theRes;
1350         }
1351
1352         did = true;
1353
1354         sp_curve_unref(curve);
1355         // remember the position of the item
1356         gint pos = SP_OBJECT_REPR(item)->position();
1357         // remember parent
1358         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1359         // remember id
1360         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1361
1362         selection->remove(item);
1363         SP_OBJECT(item)->deleteObject(false);
1364
1365         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1366
1367             gchar tstr[80];
1368
1369             tstr[79] = '\0';
1370
1371             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1372             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1373
1374             repr->setAttribute("style", style);
1375
1376             gchar *str = res->svg_dump_path();
1377             repr->setAttribute("d", str);
1378             g_free(str);
1379
1380             // add the new repr to the parent
1381             parent->appendChild(repr);
1382
1383             // move to the saved position
1384             repr->setPosition(pos > 0 ? pos : 0);
1385
1386             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1387
1388             // reapply the transform
1389             sp_item_write_transform(newitem, repr, transform);
1390
1391             repr->setAttribute("id", id);
1392
1393             selection->add(repr);
1394
1395             Inkscape::GC::release(repr);
1396         }
1397
1398         delete orig;
1399         delete res;
1400     }
1401
1402     if (did) {
1403         sp_document_done(sp_desktop_document(desktop),
1404                          (expand ? SP_VERB_SELECTION_OFFSET : SP_VERB_SELECTION_INSET),
1405                          (expand ? _("Outset path") : _("Inset path")));
1406     } else {
1407         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1408         return;
1409     }
1410 }
1411
1412
1413 static bool
1414 sp_selected_path_simplify_items(SPDesktop *desktop,
1415                                 Inkscape::Selection *selection, GSList *items,
1416                                 float threshold,  bool justCoalesce,
1417                                 float angleLimit, bool breakableAngles,
1418                                 bool modifySelection);
1419
1420
1421 //return true if we changed something, else false
1422 bool
1423 sp_selected_path_simplify_item(SPDesktop *desktop,
1424                  Inkscape::Selection *selection, SPItem *item,
1425                  float threshold,  bool justCoalesce,
1426                  float angleLimit, bool breakableAngles,
1427                  gdouble size,     bool modifySelection)
1428 {
1429     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1430         return false;
1431
1432     //If this is a group, do the children instead
1433     if (SP_IS_GROUP(item)) {
1434         GSList *items = sp_item_group_item_list(SP_GROUP(item));
1435
1436         return sp_selected_path_simplify_items(desktop, selection, items,
1437                                                threshold, justCoalesce,
1438                                                angleLimit, breakableAngles,
1439                                                false);
1440     }
1441
1442
1443     SPCurve *curve = NULL;
1444
1445     if (SP_IS_SHAPE(item)) {
1446         curve = sp_shape_get_curve(SP_SHAPE(item));
1447         if (!curve)
1448             return false;
1449     }
1450
1451     if (SP_IS_TEXT(item)) {
1452         curve = SP_TEXT(item)->getNormalizedBpath();
1453         if (!curve)
1454             return false;
1455     }
1456
1457     // save the transform, to re-apply it after simplification
1458     NR::Matrix const transform(item->transform);
1459
1460     /*
1461        reset the transform, effectively transforming the item by transform.inverse();
1462        this is necessary so that the item is transformed twice back and forth,
1463        allowing all compensations to cancel out regardless of the preferences
1464     */
1465     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1466
1467     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1468     gchar *mask = g_strdup(SP_OBJECT_REPR(item)->attribute("mask"));
1469     gchar *clip_path = g_strdup(SP_OBJECT_REPR(item)->attribute("clip-path"));
1470
1471     Path *orig = Path_for_item(item, false);
1472     if (orig == NULL) {
1473         g_free(style);
1474         sp_curve_unref(curve);
1475         return false;
1476     }
1477
1478     sp_curve_unref(curve);
1479     // remember the position of the item
1480     gint pos = SP_OBJECT_REPR(item)->position();
1481     // remember parent
1482     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1483     // remember id
1484     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1485
1486     //If a group was selected, to not change the selection list
1487     if (modifySelection)
1488         selection->remove(item);
1489
1490     SP_OBJECT(item)->deleteObject(false);
1491
1492     if ( justCoalesce ) {
1493         orig->Coalesce(threshold * size);
1494     } else {
1495         orig->ConvertEvenLines(threshold * size);
1496         orig->Simplify(threshold * size);
1497     }
1498
1499     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1500     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1501
1502     // restore style, mask and clip-path
1503     repr->setAttribute("style", style);
1504     g_free(style);
1505
1506     if ( mask ) {
1507         repr->setAttribute("mask", mask);
1508         g_free(mask);
1509     }
1510
1511     if ( clip_path ) {
1512         repr->setAttribute("clip-path", clip_path);
1513         g_free(clip_path);
1514     }
1515
1516     // path
1517     gchar *str = orig->svg_dump_path();
1518     repr->setAttribute("d", str);
1519     g_free(str);
1520
1521     // restore id
1522     repr->setAttribute("id", id);
1523
1524     // add the new repr to the parent
1525     parent->appendChild(repr);
1526
1527     // move to the saved position
1528     repr->setPosition(pos > 0 ? pos : 0);
1529
1530     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1531
1532     // reapply the transform
1533     sp_item_write_transform(newitem, repr, transform);
1534
1535     //If we are not in a selected group
1536     if (modifySelection)
1537         selection->add(repr);
1538
1539     Inkscape::GC::release(repr);
1540
1541     // clean up
1542     if (orig) delete orig;
1543
1544     return true;
1545 }
1546
1547
1548 bool
1549 sp_selected_path_simplify_items(SPDesktop *desktop,
1550                                 Inkscape::Selection *selection, GSList *items,
1551                                 float threshold,  bool justCoalesce,
1552                                 float angleLimit, bool breakableAngles,
1553                                 bool modifySelection)
1554 {
1555   bool simplifyIndividualPaths =
1556     (bool) prefs_get_int_attribute("options.simplifyindividualpaths", "value", 0);
1557
1558   gchar *simplificationType;
1559   if (simplifyIndividualPaths) {
1560       simplificationType = _("Simplifying paths (separately):");
1561   } else {
1562       simplificationType = _("Simplifying paths:");
1563   }
1564
1565   bool didSomething = false;
1566
1567   NR::Maybe<NR::Rect> selectionBbox = selection->bounds();
1568   if (!selectionBbox) {
1569     return false;
1570   }
1571   gdouble selectionSize  = L2(selectionBbox->dimensions());
1572
1573   gdouble simplifySize  = selectionSize;
1574
1575   int pathsSimplified = 0;
1576   int totalPathCount  = g_slist_length(items);
1577
1578   // set "busy" cursor
1579   desktop->setWaitingCursor();
1580
1581   for (; items != NULL; items = items->next) {
1582       SPItem *item = (SPItem *) items->data;
1583
1584       if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1585           continue;
1586
1587       if (simplifyIndividualPaths) {
1588           NR::Maybe<NR::Rect> itemBbox = item->getBounds(sp_item_i2d_affine(item));
1589           if (itemBbox) {
1590               simplifySize      = L2(itemBbox->dimensions());
1591           } else {
1592               simplifySize      = 0;
1593           }
1594       }
1595
1596       pathsSimplified++;
1597
1598       if (pathsSimplified % 20 == 0) {
1599         gchar *message = g_strdup_printf(_("%s <b>%d</b> of <b>%d</b> paths simplified..."), simplificationType, pathsSimplified, totalPathCount);
1600         desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, message);
1601       }
1602
1603       didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1604                           threshold, justCoalesce, angleLimit, breakableAngles, simplifySize, modifySelection);
1605   }
1606
1607   desktop->clearWaitingCursor();
1608
1609   if (pathsSimplified > 20) {
1610     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, g_strdup_printf(_("<b>%d</b> paths simplified."), pathsSimplified));
1611   }
1612
1613   return didSomething;
1614 }
1615
1616 void
1617 sp_selected_path_simplify_selection(float threshold, bool justCoalesce,
1618                        float angleLimit, bool breakableAngles)
1619 {
1620     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1621
1622     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1623
1624     if (selection->isEmpty()) {
1625         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1626                          _("Select <b>path(s)</b> to simplify."));
1627         return;
1628     }
1629
1630     GSList *items = g_slist_copy((GSList *) selection->itemList());
1631
1632     bool didSomething = sp_selected_path_simplify_items(desktop, selection,
1633                                                         items, threshold,
1634                                                         justCoalesce,
1635                                                         angleLimit,
1636                                                         breakableAngles, true);
1637
1638     if (didSomething)
1639         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_SIMPLIFY,
1640                          _("Simplify"));
1641     else
1642         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1643
1644 }
1645
1646
1647 // globals for keeping track of accelerated simplify
1648 static double previousTime      = 0.0;
1649 static gdouble simplifyMultiply = 1.0;
1650
1651 void
1652 sp_selected_path_simplify(void)
1653 {
1654     gdouble simplifyThreshold =
1655         prefs_get_double_attribute("options.simplifythreshold", "value", 0.003);
1656     bool simplifyJustCoalesce =
1657         (bool) prefs_get_int_attribute("options.simplifyjustcoalesce", "value", 0);
1658
1659     //Get the current time
1660     GTimeVal currentTimeVal;
1661     g_get_current_time(&currentTimeVal);
1662     double currentTime = currentTimeVal.tv_sec * 1000000 +
1663                 currentTimeVal.tv_usec;
1664
1665     //Was the previous call to this function recent? (<0.5 sec)
1666     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1667
1668         // add to the threshold 1/2 of its original value
1669         simplifyMultiply  += 0.5;
1670         simplifyThreshold *= simplifyMultiply;
1671
1672     } else {
1673         // reset to the default
1674         simplifyMultiply = 1;
1675     }
1676
1677     //remember time for next call
1678     previousTime = currentTime;
1679
1680     //g_print("%g\n", simplify_threshold);
1681
1682     //Make the actual call
1683     sp_selected_path_simplify_selection(simplifyThreshold,
1684                       simplifyJustCoalesce, 0.0, false);
1685 }
1686
1687
1688
1689 // fonctions utilitaires
1690
1691 bool
1692 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1693 {
1694     if (who == NULL || a == NULL)
1695         return false;
1696     if (who == a)
1697         return true;
1698     return Ancetre(sp_repr_parent(a), who);
1699 }
1700
1701 Path *
1702 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1703 {
1704     SPCurve *curve;
1705
1706     if (!item)
1707         return NULL;
1708
1709     if (SP_IS_SHAPE(item))
1710     {
1711         curve = sp_shape_get_curve(SP_SHAPE(item));
1712     }
1713     else if (SP_IS_TEXT(item))
1714     {
1715         curve = SP_TEXT(item)->getNormalizedBpath();
1716     }
1717     else if (SP_IS_IMAGE(item))
1718     {
1719         curve = sp_image_get_curve(SP_IMAGE(item));
1720     }
1721     else
1722     {
1723         curve = NULL;
1724     }
1725
1726     if (!curve)
1727         return NULL;
1728     NArtBpath *bpath = SP_CURVE_BPATH(curve);
1729     if (bpath == NULL)
1730         return NULL;
1731
1732     if ( doTransformation ) {
1733         if (transformFull)
1734             bpath = nr_artpath_affine(SP_CURVE_BPATH(curve), sp_item_i2doc_affine(item));
1735         else
1736             bpath = nr_artpath_affine(SP_CURVE_BPATH(curve), item->transform);
1737         sp_curve_unref(curve);
1738         curve=NULL;
1739     } else {
1740         bpath=SP_CURVE_BPATH(curve);
1741     }
1742
1743     Path *dest = bpath_to_Path(bpath);
1744
1745     if ( doTransformation ) {
1746         if ( bpath ) g_free(bpath);
1747     } else {
1748         sp_curve_unref(curve);
1749     }
1750     return dest;
1751 }
1752
1753 Path *bpath_to_Path(NArtBpath const *bpath) {
1754     Path *dest = new Path;
1755     dest->SetBackData(false);
1756     {
1757         int   i;
1758         bool  closed = false;
1759         float lastX  = 0.0;
1760         float lastY  = 0.0;
1761
1762         for (i = 0; bpath[i].code != NR_END; i++) {
1763             switch (bpath[i].code) {
1764                 case NR_LINETO:
1765                     lastX = bpath[i].x3;
1766                     lastY = bpath[i].y3;
1767                     {
1768                         NR::Point tmp(lastX, lastY);
1769                         dest->LineTo(tmp);
1770                     }
1771                     break;
1772
1773                 case NR_CURVETO:
1774                 {
1775                     NR::Point tmp, tms, tme;
1776                     tmp[0]=bpath[i].x3;
1777                     tmp[1]=bpath[i].y3;
1778                     tms[0]=3 * (bpath[i].x1 - lastX);
1779                     tms[1]=3 * (bpath[i].y1 - lastY);
1780                     tme[0]=3 * (bpath[i].x3 - bpath[i].x2);
1781                     tme[1]=3 * (bpath[i].y3 - bpath[i].y2);
1782                     dest->CubicTo(tmp,tms,tme);
1783                 }
1784                 lastX = bpath[i].x3;
1785                 lastY = bpath[i].y3;
1786                 break;
1787
1788                 case NR_MOVETO_OPEN:
1789                 case NR_MOVETO:
1790                     if (closed)
1791                         dest->Close();
1792                     closed = (bpath[i].code == NR_MOVETO);
1793                     lastX = bpath[i].x3;
1794                     lastY = bpath[i].y3;
1795                     {
1796                         NR::Point  tmp(lastX, lastY);
1797                         dest->MoveTo(tmp);
1798                     }
1799                     break;
1800                 default:
1801                     break;
1802             }
1803         }
1804         if (closed)
1805             dest->Close();
1806     }
1807     return dest;
1808 }
1809
1810 NR::Maybe<Path::cut_position> get_nearest_position_on_Path(Path *path, NR::Point p)
1811 {
1812     //get nearest position on path
1813     Path::cut_position pos = path->PointToCurvilignPosition(p);
1814     return pos;
1815 }
1816
1817 NR::Point get_point_on_Path(Path *path, int piece, double t)
1818 {
1819     NR::Point p;
1820     path->PointAt(piece, t, p);
1821     return p;
1822 }
1823
1824
1825 /*
1826   Local Variables:
1827   mode:c++
1828   c-file-style:"stroustrup"
1829   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1830   indent-tabs-mode:nil
1831   fill-column:99
1832   End:
1833 */
1834 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :