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 "marker.h"
  27 #include "enums.h"
  28 #include "sp-text.h"
  29 #include "sp-item-group.h"
  30 #include "style.h"
  31 #include "inkscape.h"
  32 #include "document.h"
  33 #include "message-stack.h"
  34 #include "selection.h"
  35 #include "desktop-handles.h"
  36 #include "desktop.h"
  37 #include "display/canvas-bpath.h"
  38 #include "display/curve.h"
  39 #include <glibmm/i18n.h>
  40 #include "prefs-utils.h"
  41
  42 #include "libnr/n-art-bpath.h"
  43 #include "libnr/nr-path.h"
  44 #include "xml/repr.h"
  45 #include "xml/repr-sorting.h"
  46
  47 #include <libnr/nr-matrix-fns.h>
  48 #include <libnr/nr-matrix-ops.h>
  49 #include <libnr/nr-matrix-translate-ops.h>
  50 #include <libnr/nr-scale-matrix-ops.h>
  51
  52 #include "livarot/Path.h"
  53 #include "livarot/Shape.h"
  54
  55 #include "splivarot.h"
  56
  57 bool   Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who);
  58
  59 void sp_selected_path_boolop(bool_op bop, const unsigned int verb=SP_VERB_NONE, const Glib::ustring description="");
  60 void sp_selected_path_do_offset(bool expand, double prefOffset);
  61 void sp_selected_path_create_offset_object(int expand, bool updating);
  62
  63 void
  64 sp_selected_path_union()
  65 {
  66     sp_selected_path_boolop(bool_op_union, SP_VERB_SELECTION_UNION, _("Union"));
  67 }
  68
  69 void
  70 sp_selected_path_intersect()
  71 {
  72     sp_selected_path_boolop(bool_op_inters, SP_VERB_SELECTION_INTERSECT, _("Intersection"));
  73 }
  74
  75 void
  76 sp_selected_path_diff()
  77 {
  78     sp_selected_path_boolop(bool_op_diff, SP_VERB_SELECTION_DIFF, _("Difference"));
  79 }
  80
  81 void
  82 sp_selected_path_symdiff()
  83 {
  84     sp_selected_path_boolop(bool_op_symdiff, SP_VERB_SELECTION_SYMDIFF, _("Exclusion"));
  85 }
  86 void
  87 sp_selected_path_cut()
  88 {
  89     sp_selected_path_boolop(bool_op_cut, SP_VERB_SELECTION_CUT, _("Division"));
  90 }
  91 void
  92 sp_selected_path_slice()
  93 {
  94     sp_selected_path_boolop(bool_op_slice, SP_VERB_SELECTION_SLICE,  _("Cut path"));
  95 }
  96
  97
  98 // boolean operations
  99 // take the source paths from the file, do the operation, delete the originals and add the results
 100 void
 101 sp_selected_path_boolop(bool_op bop, const unsigned int verb, const Glib::ustring description)
 102 {
 103     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 104
 105     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 106
 107     GSList *il = (GSList *) selection->itemList();
 108
 109     // allow union on a single object for the purpose of removing self overlapse (svn log, revision 13334)
 110     if ( (g_slist_length(il) < 2) && (bop != bool_op_union)) {
 111         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 2 paths</b> to perform a boolean operation."));
 112         return;
 113     }
 114     else if ( g_slist_length(il) < 1 ) {
 115         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 1 path</b> to perform a boolean union."));
 116         return;
 117     }
 118
 119     if (g_slist_length(il) > 2) {
 120         if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 121             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>exactly 2 paths</b> to perform difference, XOR, division, or path cut."));
 122             return;
 123         }
 124     }
 125
 126     // reverseOrderForOp marks whether the order of the list is the top->down order
 127     // it's only used when there are 2 objects, and for operations who need to know the
 128     // topmost object (differences, cuts)
 129     bool reverseOrderForOp = false;
 130
 131     // mettre les elements de la liste dans l'ordre pour ces operations
 132     if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice) {
 133         // check in the tree to find which element of the selection list is topmost (for 2-operand commands only)
 134         Inkscape::XML::Node *a = SP_OBJECT_REPR(il->data);
 135         Inkscape::XML::Node *b = SP_OBJECT_REPR(il->next->data);
 136
 137         if (a == NULL || b == NULL) {
 138             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."));
 139             return;
 140         }
 141
 142         if (Ancetre(a, b)) {
 143             // a is the parent of b, already in the proper order
 144         } else if (Ancetre(b, a)) {
 145             // reverse order
 146             reverseOrderForOp = true;
 147         } else {
 148
 149             // objects are not in parent/child relationship;
 150             // find their lowest common ancestor
 151             Inkscape::XML::Node *dad = LCA(a, b);
 152             if (dad == NULL) {
 153                 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."));
 154                 return;
 155             }
 156
 157             // find the children of the LCA that lead from it to the a and b
 158             Inkscape::XML::Node *as = AncetreFils(a, dad);
 159             Inkscape::XML::Node *bs = AncetreFils(b, dad);
 160
 161             // find out which comes first
 162             for (Inkscape::XML::Node *child = dad->firstChild(); child; child = child->next()) {
 163                 if (child == as) {
 164                     /* a first, so reverse. */
 165                     reverseOrderForOp = true;
 166                     break;
 167                 }
 168                 if (child == bs)
 169                     break;
 170             }
 171         }
 172     }
 173
 174     il = g_slist_copy(il);
 175
 176     // first check if all the input objects have shapes
 177     // otherwise bail out
 178     for (GSList *l = il; l != NULL; l = l->next)
 179     {
 180         SPItem *item = SP_ITEM(l->data);
 181         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 182         {
 183             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("One of the objects is <b>not a path</b>, cannot perform boolean operation."));
 184             g_slist_free(il);
 185             return;
 186         }
 187     }
 188
 189     // extract the livarot Paths from the source objects
 190     // also get the winding rule specified in the style
 191     int nbOriginaux = g_slist_length(il);
 192     std::vector<Path *> originaux(nbOriginaux);
 193     std::vector<FillRule> origWind(nbOriginaux);
 194     int curOrig;
 195     {
 196         curOrig = 0;
 197         for (GSList *l = il; l != NULL; l = l->next)
 198         {
 199             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(il->data), "style");
 200             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 201             if (val && strcmp(val, "nonzero") == 0) {
 202                 origWind[curOrig]= fill_nonZero;
 203             } else if (val && strcmp(val, "evenodd") == 0) {
 204                 origWind[curOrig]= fill_oddEven;
 205             } else {
 206                 origWind[curOrig]= fill_nonZero;
 207             }
 208
 209             originaux[curOrig] = Path_for_item((SPItem *) l->data, true, true);
 210             if (originaux[curOrig] == NULL || originaux[curOrig]->descr_cmd.size() <= 1)
 211             {
 212                 for (int i = curOrig; i >= 0; i--) delete originaux[i];
 213                 g_slist_free(il);
 214                 return;
 215             }
 216             curOrig++;
 217         }
 218     }
 219     // reverse if needed
 220     // note that the selection list keeps its order
 221     if ( reverseOrderForOp ) {
 222         Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 223         FillRule swai=origWind[0]; origWind[0]=origWind[1]; origWind[1]=swai;
 224     }
 225
 226     // and work
 227     // some temporary instances, first
 228     Shape *theShapeA = new Shape;
 229     Shape *theShapeB = new Shape;
 230     Shape *theShape = new Shape;
 231     Path *res = new Path;
 232     res->SetBackData(false);
 233     Path::cut_position  *toCut=NULL;
 234     int                  nbToCut=0;
 235
 236     if ( bop == bool_op_inters || bop == bool_op_union || bop == bool_op_diff || bop == bool_op_symdiff ) {
 237         // true boolean op
 238         // get the polygons of each path, with the winding rule specified, and apply the operation iteratively
 239         originaux[0]->ConvertWithBackData(0.1);
 240
 241         originaux[0]->Fill(theShape, 0);
 242
 243         theShapeA->ConvertToShape(theShape, origWind[0]);
 244
 245         curOrig = 1;
 246         for (GSList *l = il->next; l != NULL; l = l->next) {
 247             originaux[curOrig]->ConvertWithBackData(0.1);
 248
 249             originaux[curOrig]->Fill(theShape, curOrig);
 250
 251             theShapeB->ConvertToShape(theShape, origWind[curOrig]);
 252
 253             // les elements arrivent en ordre inverse dans la liste
 254             theShape->Booleen(theShapeB, theShapeA, bop);
 255
 256             {
 257                 Shape *swap = theShape;
 258                 theShape = theShapeA;
 259                 theShapeA = swap;
 260             }
 261             curOrig++;
 262         }
 263
 264         {
 265             Shape *swap = theShape;
 266             theShape = theShapeA;
 267             theShapeA = swap;
 268         }
 269
 270     } else if ( bop == bool_op_cut ) {
 271         // cuts= sort of a bastard boolean operation, thus not the axact same modus operandi
 272         // technically, the cut path is not necessarily a polygon (thus has no winding rule)
 273         // it is just uncrossed, and cleaned from duplicate edges and points
 274         // then it's fed to Booleen() which will uncross it against the other path
 275         // then comes the trick: each edge of the cut path is duplicated (one in each direction),
 276         // thus making a polygon. the weight of the edges of the cut are all 0, but
 277         // the Booleen need to invert the ones inside the source polygon (for the subsequent
 278         // ConvertToForme)
 279
 280         // the cut path needs to have the highest pathID in the back data
 281         // that's how the Booleen() function knows it's an edge of the cut
 282
 283         // FIXME: this gives poor results, the final paths are full of extraneous nodes. Decreasing
 284         // ConvertWithBackData parameter below simply increases the number of nodes, so for now I
 285         // left it at 1.0. Investigate replacing this by a combination of difference and
 286         // intersection of the same two paths. -- bb
 287         {
 288             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 289             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 290         }
 291         originaux[0]->ConvertWithBackData(1.0);
 292
 293         originaux[0]->Fill(theShape, 0);
 294
 295         theShapeA->ConvertToShape(theShape, origWind[0]);
 296
 297         originaux[1]->ConvertWithBackData(1.0);
 298
 299         originaux[1]->Fill(theShape, 1,false,false,false); //do not closeIfNeeded
 300
 301         theShapeB->ConvertToShape(theShape, fill_justDont); // fill_justDont doesn't computes winding numbers
 302
 303         // les elements arrivent en ordre inverse dans la liste
 304         theShape->Booleen(theShapeB, theShapeA, bool_op_cut, 1);
 305
 306     } else if ( bop == bool_op_slice ) {
 307         // slice is not really a boolean operation
 308         // you just put the 2 shapes in a single polygon, uncross it
 309         // the points where the degree is > 2 are intersections
 310         // just check it's an intersection on the path you want to cut, and keep it
 311         // the intersections you have found are then fed to ConvertPositionsToMoveTo() which will
 312         // make new subpath at each one of these positions
 313         // inversion pour l'op\8eration
 314         {
 315             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 316             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 317         }
 318         originaux[0]->ConvertWithBackData(1.0);
 319
 320         originaux[0]->Fill(theShapeA, 0,false,false,false); // don't closeIfNeeded
 321
 322         originaux[1]->ConvertWithBackData(1.0);
 323
 324         originaux[1]->Fill(theShapeA, 1,true,false,false);// don't closeIfNeeded and just dump in the shape, don't reset it
 325
 326         theShape->ConvertToShape(theShapeA, fill_justDont);
 327
 328         if ( theShape->hasBackData() ) {
 329             // should always be the case, but ya never know
 330             {
 331                 for (int i = 0; i < theShape->numberOfPoints(); i++) {
 332                     if ( theShape->getPoint(i).totalDegree() > 2 ) {
 333                         // possibly an intersection
 334                         // we need to check that at least one edge from the source path is incident to it
 335                         // before we declare it's an intersection
 336                         int cb = theShape->getPoint(i).incidentEdge[FIRST];
 337                         int   nbOrig=0;
 338                         int   nbOther=0;
 339                         int   piece=-1;
 340                         float t=0.0;
 341                         while ( cb >= 0 && cb < theShape->numberOfEdges() ) {
 342                             if ( theShape->ebData[cb].pathID == 0 ) {
 343                                 // the source has an edge incident to the point, get its position on the path
 344                                 piece=theShape->ebData[cb].pieceID;
 345                                 if ( theShape->getEdge(cb).st == i ) {
 346                                     t=theShape->ebData[cb].tSt;
 347                                 } else {
 348                                     t=theShape->ebData[cb].tEn;
 349                                 }
 350                                 nbOrig++;
 351                             }
 352                             if ( theShape->ebData[cb].pathID == 1 ) nbOther++; // the cut is incident to this point
 353                             cb=theShape->NextAt(i, cb);
 354                         }
 355                         if ( nbOrig > 0 && nbOther > 0 ) {
 356                             // point incident to both path and cut: an intersection
 357                             // note that you only keep one position on the source; you could have degenerate
 358                             // cases where the source crosses itself at this point, and you wouyld miss an intersection
 359                             toCut=(Path::cut_position*)realloc(toCut, (nbToCut+1)*sizeof(Path::cut_position));
 360                             toCut[nbToCut].piece=piece;
 361                             toCut[nbToCut].t=t;
 362                             nbToCut++;
 363                         }
 364                     }
 365                 }
 366             }
 367             {
 368                 // i think it's useless now
 369                 int i = theShape->numberOfEdges() - 1;
 370                 for (;i>=0;i--) {
 371                     if ( theShape->ebData[i].pathID == 1 ) {
 372                         theShape->SubEdge(i);
 373                     }
 374                 }
 375             }
 376
 377         }
 378     }
 379
 380     int*    nesting=NULL;
 381     int*    conts=NULL;
 382     int     nbNest=0;
 383     // pour compenser le swap juste avant
 384     if ( bop == bool_op_slice ) {
 385 //    theShape->ConvertToForme(res, nbOriginaux, originaux, true);
 386 //    res->ConvertForcedToMoveTo();
 387         res->Copy(originaux[0]);
 388         res->ConvertPositionsToMoveTo(nbToCut, toCut); // cut where you found intersections
 389         free(toCut);
 390     } else if ( bop == bool_op_cut ) {
 391         // il faut appeler pour desallouer PointData (pas vital, mais bon)
 392         // the Booleen() function did not deallocated the point_data array in theShape, because this
 393         // function needs it.
 394         // this function uses the point_data to get the winding number of each path (ie: is a hole or not)
 395         // for later reconstruction in objects, you also need to extract which path is parent of holes (nesting info)
 396         theShape->ConvertToFormeNested(res, nbOriginaux, &originaux[0], 1, nbNest, nesting, conts);
 397     } else {
 398         theShape->ConvertToForme(res, nbOriginaux, &originaux[0]);
 399     }
 400
 401     delete theShape;
 402     delete theShapeA;
 403     delete theShapeB;
 404     for (int i = 0; i < nbOriginaux; i++)  delete originaux[i];
 405
 406     if (res->descr_cmd.size() <= 1)
 407     {
 408         // only one command, presumably a moveto: it isn't a path
 409         for (GSList *l = il; l != NULL; l = l->next)
 410         {
 411             SP_OBJECT(l->data)->deleteObject();
 412         }
 413         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 414                          description);
 415         selection->clear();
 416
 417         delete res;
 418         g_slist_free(il);
 419         return;
 420     }
 421
 422     // get the source path object
 423     SPObject *source;
 424     if ( bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 425         if (reverseOrderForOp) {
 426              source = SP_OBJECT(il->data);
 427         } else {
 428              source = SP_OBJECT(il->next->data);
 429         }
 430     } else {
 431         // find out the bottom object
 432         GSList *sorted = g_slist_copy((GSList *) selection->reprList());
 433
 434         sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
 435
 436         source = sp_desktop_document(desktop)->
 437             getObjectByRepr((Inkscape::XML::Node *)sorted->data);
 438
 439         g_slist_free(sorted);
 440     }
 441
 442     // adjust style properties that depend on a possible transform in the source object in order
 443     // to get a correct style attribute for the new path
 444     SPItem* item_source = SP_ITEM(source);
 445     NR::Matrix i2d = sp_item_i2d_affine(item_source);
 446     sp_item_adjust_stroke(item_source, i2d.expansion());
 447     sp_item_adjust_pattern(item_source, i2d);
 448     sp_item_adjust_gradient(item_source, i2d);
 449
 450     Inkscape::XML::Node *repr_source = SP_OBJECT_REPR(source);
 451
 452     // remember important aspects of the source path, to be restored
 453     gint pos = repr_source->position();
 454     Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
 455     gchar const *id = repr_source->attribute("id");
 456     gchar const *style = repr_source->attribute("style");
 457     gchar const *mask = repr_source->attribute("mask");
 458     gchar const *clip_path = repr_source->attribute("clip-path");
 459
 460     // remove source paths
 461     selection->clear();
 462     for (GSList *l = il; l != NULL; l = l->next) {
 463         // if this is the bottommost object,
 464         if (!strcmp(SP_OBJECT_REPR(l->data)->attribute("id"), id)) {
 465             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 466             SP_OBJECT(l->data)->deleteObject(false);
 467         } else {
 468             // delete the object for real, so that its clones can take appropriate action
 469             SP_OBJECT(l->data)->deleteObject();
 470         }
 471     }
 472     g_slist_free(il);
 473
 474     // premultiply by the inverse of parent's repr
 475     SPItem *parent_item = SP_ITEM(sp_desktop_document(desktop)->getObjectByRepr(parent));
 476     NR::Matrix local = sp_item_i2doc_affine(parent_item);
 477     gchar affinestr[80];
 478     gchar *transform = NULL;
 479     if (!local.test_identity() && sp_svg_transform_write(affinestr, 79, local.inverse())) {
 480         transform = affinestr;
 481     }
 482
 483     // now that we have the result, add it on the canvas
 484     if ( bop == bool_op_cut || bop == bool_op_slice ) {
 485         int    nbRP=0;
 486         Path** resPath;
 487         if ( bop == bool_op_slice ) {
 488             // there are moveto's at each intersection, but it's still one unique path
 489             // so break it down and add each subpath independently
 490             // we could call break_apart to do this, but while we have the description...
 491             resPath=res->SubPaths(nbRP, false);
 492         } else {
 493             // cut operation is a bit wicked: you need to keep holes
 494             // that's why you needed the nesting
 495             // ConvertToFormeNested() dumped all the subpath in a single Path "res", so we need
 496             // to get the path for each part of the polygon. that's why you need the nesting info:
 497             // to know in wich subpath to add a subpath
 498             resPath=res->SubPathsWithNesting(nbRP, true, nbNest, nesting, conts);
 499
 500             // cleaning
 501             if ( conts ) free(conts);
 502             if ( nesting ) free(nesting);
 503         }
 504
 505         // add all the pieces resulting from cut or slice
 506         for (int i=0;i<nbRP;i++) {
 507             gchar *d = resPath[i]->svg_dump_path();
 508
 509             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 510             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 511             repr->setAttribute("style", style);
 512             if (mask)
 513                 repr->setAttribute("mask", mask);
 514             if (clip_path)
 515                 repr->setAttribute("clip-path", clip_path);
 516
 517             repr->setAttribute("d", d);
 518             g_free(d);
 519
 520             // for slice, remove fill
 521             if (bop == bool_op_slice) {
 522                 SPCSSAttr *css;
 523
 524                 css = sp_repr_css_attr_new();
 525                 sp_repr_css_set_property(css, "fill", "none");
 526
 527                 sp_repr_css_change(repr, css, "style");
 528
 529                 sp_repr_css_attr_unref(css);
 530             }
 531
 532             // we assign the same id on all pieces, but it on adding to document, it will be changed on all except one
 533             // this means it's basically random which of the pieces inherits the original's id and clones
 534             // a better algorithm might figure out e.g. the biggest piece
 535             repr->setAttribute("id", id);
 536
 537             repr->setAttribute("transform", transform);
 538
 539             // add the new repr to the parent
 540             parent->appendChild(repr);
 541
 542             // move to the saved position
 543             repr->setPosition(pos > 0 ? pos : 0);
 544
 545             selection->add(repr);
 546             Inkscape::GC::release(repr);
 547
 548             delete resPath[i];
 549         }
 550         if ( resPath ) free(resPath);
 551
 552     } else {
 553         gchar *d = res->svg_dump_path();
 554
 555         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 556         Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 557         repr->setAttribute("style", style);
 558
 559         if ( mask )
 560             repr->setAttribute("mask", mask);
 561
 562         if ( clip_path )
 563             repr->setAttribute("clip-path", clip_path);
 564
 565         repr->setAttribute("d", d);
 566         g_free(d);
 567
 568         repr->setAttribute("transform", transform);
 569
 570         repr->setAttribute("id", id);
 571         parent->appendChild(repr);
 572         repr->setPosition(pos > 0 ? pos : 0);
 573
 574         selection->add(repr);
 575         Inkscape::GC::release(repr);
 576     }
 577
 578     sp_document_done(sp_desktop_document(desktop), verb, description);
 579
 580     delete res;
 581 }
 582
 583
 584 void
 585 sp_selected_path_outline()
 586 {
 587     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 588
 589     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 590
 591     if (selection->isEmpty()) {
 592         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>stroked path(s)</b> to convert stroke to path."));
 593         return;
 594     }
 595
 596     bool did = false;
 597
 598     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 599          items != NULL;
 600          items = items->next) {
 601
 602         SPItem *item = (SPItem *) items->data;
 603
 604         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 605             continue;
 606
 607         SPCurve *curve = NULL;
 608         if (SP_IS_SHAPE(item)) {
 609             curve = sp_shape_get_curve(SP_SHAPE(item));
 610             if (curve == NULL)
 611                 continue;
 612         }
 613         if (SP_IS_TEXT(item)) {
 614             curve = SP_TEXT(item)->getNormalizedBpath();
 615             if (curve == NULL)
 616                 continue;
 617         }
 618
 619         {   // pas de stroke pas de chocolat
 620             SPCSSAttr *css = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 621             gchar const *val = sp_repr_css_property(css, "stroke", NULL);
 622
 623             if (val == NULL || strcmp(val, "none") == 0) {
 624                 sp_curve_unref(curve);
 625                 continue;
 626             }
 627         }
 628
 629         // remember old stroke style, to be set on fill
 630         SPCSSAttr *ncss;
 631         {
 632             SPCSSAttr *ocss = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 633             gchar const *val = sp_repr_css_property(ocss, "stroke", NULL);
 634             gchar const *opac = sp_repr_css_property(ocss, "stroke-opacity", NULL);
 635
 636             ncss = sp_repr_css_attr_new();
 637
 638             sp_repr_css_set_property(ncss, "stroke", "none");
 639             sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
 640             sp_repr_css_set_property(ncss, "fill", val);
 641             if ( opac ) {
 642                 sp_repr_css_set_property(ncss, "fill-opacity", opac);
 643             } else {
 644                 sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
 645             }
 646             sp_repr_css_unset_property(ncss, "marker-start");
 647             sp_repr_css_unset_property(ncss, "marker-mid");
 648             sp_repr_css_unset_property(ncss, "marker-end");
 649         }
 650
 651         NR::Matrix const transform(item->transform);
 652         float const scale = transform.expansion();
 653         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
 654         SPStyle *i_style = SP_OBJECT(item)->style;
 655         gchar const *mask = SP_OBJECT_REPR(item)->attribute("mask");
 656         gchar const *clip_path = SP_OBJECT_REPR(item)->attribute("clip-path");
 657
 658         float o_width, o_miter;
 659         JoinType o_join;
 660         ButtType o_butt;
 661
 662         {
 663             int jointype, captype;
 664
 665             jointype = i_style->stroke_linejoin.computed;
 666             captype = i_style->stroke_linecap.computed;
 667             o_width = i_style->stroke_width.computed;
 668
 669             switch (jointype) {
 670                 case SP_STROKE_LINEJOIN_MITER:
 671                     o_join = join_pointy;
 672                     break;
 673                 case SP_STROKE_LINEJOIN_ROUND:
 674                     o_join = join_round;
 675                     break;
 676                 default:
 677                     o_join = join_straight;
 678                     break;
 679             }
 680
 681             switch (captype) {
 682                 case SP_STROKE_LINECAP_SQUARE:
 683                     o_butt = butt_square;
 684                     break;
 685                 case SP_STROKE_LINECAP_ROUND:
 686                     o_butt = butt_round;
 687                     break;
 688                 default:
 689                     o_butt = butt_straight;
 690                     break;
 691             }
 692
 693             if (o_width < 0.1)
 694                 o_width = 0.1;
 695             o_miter = i_style->stroke_miterlimit.value * o_width;
 696         }
 697
 698         Path *orig = Path_for_item(item, false);
 699         if (orig == NULL) {
 700             g_free(style);
 701             sp_curve_unref(curve);
 702             continue;
 703         }
 704
 705         Path *res = new Path;
 706         res->SetBackData(false);
 707
 708         if (i_style->stroke_dash.n_dash) {
 709             // For dashed strokes, use Stroke method, because Outline can't do dashes
 710             // However Stroke adds lots of extra nodes _or_ makes the path crooked, so consider this a temporary workaround
 711
 712             orig->ConvertWithBackData(0.1);
 713
 714             orig->DashPolylineFromStyle(i_style, scale, 0);
 715
 716             Shape* theShape = new Shape;
 717             orig->Stroke(theShape, false, 0.5*o_width, o_join, o_butt,
 718                          0.5 * o_miter);
 719             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 720
 721             Shape *theRes = new Shape;
 722
 723             theRes->ConvertToShape(theShape, fill_positive);
 724
 725             Path *originaux[1];
 726             originaux[0] = res;
 727             theRes->ConvertToForme(orig, 1, originaux);
 728
 729             res->Coalesce(5.0);
 730
 731             delete theShape;
 732             delete theRes;
 733
 734         } else {
 735
 736             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 737
 738             orig->Coalesce(0.5 * o_width);
 739
 740             Shape *theShape = new Shape;
 741             Shape *theRes = new Shape;
 742
 743             res->ConvertWithBackData(1.0);
 744             res->Fill(theShape, 0);
 745             theRes->ConvertToShape(theShape, fill_positive);
 746
 747             Path *originaux[1];
 748             originaux[0] = res;
 749             theRes->ConvertToForme(orig, 1, originaux);
 750
 751             delete theShape;
 752             delete theRes;
 753         }
 754
 755         if (orig->descr_cmd.size() <= 1) {
 756             // ca a merd\8e, ou bien le resultat est vide
 757             delete res;
 758             delete orig;
 759             g_free(style);
 760             continue;
 761         }
 762
 763         did = true;
 764
 765         // remember the position of the item
 766         gint pos = SP_OBJECT_REPR(item)->position();
 767         // remember parent
 768         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 769         // remember id
 770         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 771
 772         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
 773
 774             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 775             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 776
 777             // restore old style
 778             repr->setAttribute("style", style);
 779
 780             // set old stroke style on fill
 781             sp_repr_css_change(repr, ncss, "style");
 782
 783             sp_repr_css_attr_unref(ncss);
 784
 785             gchar *str = orig->svg_dump_path();
 786             repr->setAttribute("d", str);
 787             g_free(str);
 788
 789             if (mask)
 790                 repr->setAttribute("mask", mask);
 791             if (clip_path)
 792                 repr->setAttribute("clip-path", clip_path);
 793
 794             if (SP_IS_SHAPE(item) && sp_shape_has_markers (SP_SHAPE(item))) {
 795
 796                 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 797                 Inkscape::XML::Node *g_repr = xml_doc->createElement("svg:g");
 798
 799                 // add the group to the parent
 800                 parent->appendChild(g_repr);
 801                 // move to the saved position
 802                 g_repr->setPosition(pos > 0 ? pos : 0);
 803
 804                 g_repr->appendChild(repr);
 805                 repr->setAttribute("id", id);
 806                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 807                 sp_item_write_transform(newitem, repr, transform);
 808
 809                 SPShape *shape = SP_SHAPE(item);
 810
 811                 for (NArtBpath* bp = SP_CURVE_BPATH(shape->curve); bp->code != NR_END; bp++) {
 812                     for (int m = SP_MARKER_LOC_START; m < SP_MARKER_LOC_QTY; m++) {
 813                         if (sp_shape_marker_required (shape, m, bp)) {
 814
 815                             SPMarker* marker = SP_MARKER (shape->marker[m]);
 816                             SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[m]));
 817
 818                             NR::Matrix tr(sp_shape_marker_get_transform(shape, bp));
 819
 820                             if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
 821                                 tr = NR::scale(i_style->stroke_width.computed) * tr;
 822                             }
 823
 824                             // total marker transform
 825                             tr = marker_item->transform * marker->c2p * tr * transform;
 826
 827                             if (SP_OBJECT_REPR(marker_item)) {
 828                                 Inkscape::XML::Node *m_repr = SP_OBJECT_REPR(marker_item)->duplicate();
 829                                 g_repr->appendChild(m_repr);
 830                                 SPItem *marker_item = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(m_repr);
 831                                 sp_item_write_transform(marker_item, m_repr, tr);
 832                             }
 833                         }
 834                     }
 835                 }
 836
 837
 838                 selection->add(g_repr);
 839
 840                 Inkscape::GC::release(g_repr);
 841
 842
 843             } else {
 844
 845                 // add the new repr to the parent
 846                 parent->appendChild(repr);
 847
 848                 // move to the saved position
 849                 repr->setPosition(pos > 0 ? pos : 0);
 850
 851                 repr->setAttribute("id", id);
 852
 853                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 854                 sp_item_write_transform(newitem, repr, transform);
 855
 856                 selection->add(repr);
 857
 858             }
 859
 860             Inkscape::GC::release(repr);
 861
 862             sp_curve_unref(curve);
 863             selection->remove(item);
 864             SP_OBJECT(item)->deleteObject(false);
 865
 866         }
 867
 868         delete res;
 869         delete orig;
 870         g_free(style);
 871
 872     }
 873
 874     if (did) {
 875         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_OUTLINE,
 876                          _("Convert stroke to path"));
 877     } else {
 878         // TRANSLATORS: "to outline" means "to convert stroke to path"
 879         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> in the selection."));
 880         return;
 881     }
 882 }
 883
 884
 885 void
 886 sp_selected_path_offset()
 887 {
 888     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 889
 890     sp_selected_path_do_offset(true, prefOffset);
 891 }
 892 void
 893 sp_selected_path_inset()
 894 {
 895     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 896
 897     sp_selected_path_do_offset(false, prefOffset);
 898 }
 899
 900 void
 901 sp_selected_path_offset_screen(double pixels)
 902 {
 903     sp_selected_path_do_offset(true,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 904 }
 905
 906 void
 907 sp_selected_path_inset_screen(double pixels)
 908 {
 909     sp_selected_path_do_offset(false,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 910 }
 911
 912
 913 void sp_selected_path_create_offset_object_zero()
 914 {
 915     sp_selected_path_create_offset_object(0, false);
 916 }
 917
 918 void sp_selected_path_create_offset()
 919 {
 920     sp_selected_path_create_offset_object(1, false);
 921 }
 922 void sp_selected_path_create_inset()
 923 {
 924     sp_selected_path_create_offset_object(-1, false);
 925 }
 926
 927 void sp_selected_path_create_updating_offset_object_zero()
 928 {
 929     sp_selected_path_create_offset_object(0, true);
 930 }
 931
 932 void sp_selected_path_create_updating_offset()
 933 {
 934     sp_selected_path_create_offset_object(1, true);
 935 }
 936 void sp_selected_path_create_updating_inset()
 937 {
 938     sp_selected_path_create_offset_object(-1, true);
 939 }
 940
 941 void
 942 sp_selected_path_create_offset_object(int expand, bool updating)
 943 {
 944     Inkscape::Selection *selection;
 945     Inkscape::XML::Node *repr;
 946     SPItem *item;
 947     SPCurve *curve;
 948     gchar *style, *str;
 949     SPDesktop *desktop;
 950     float o_width, o_miter;
 951     JoinType o_join;
 952     ButtType o_butt;
 953
 954     curve = NULL;
 955
 956     desktop = SP_ACTIVE_DESKTOP;
 957
 958     selection = sp_desktop_selection(desktop);
 959
 960     item = selection->singleItem();
 961
 962     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
 963         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
 964         return;
 965     }
 966     if (SP_IS_SHAPE(item))
 967     {
 968         curve = sp_shape_get_curve(SP_SHAPE(item));
 969         if (curve == NULL)
 970             return;
 971     }
 972     if (SP_IS_TEXT(item))
 973     {
 974         curve = SP_TEXT(item)->getNormalizedBpath();
 975         if (curve == NULL)
 976             return;
 977     }
 978
 979     NR::Matrix const transform(item->transform);
 980
 981     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
 982
 983     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
 984
 985     // remember the position of the item
 986     gint pos = SP_OBJECT_REPR(item)->position();
 987     // remember parent
 988     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 989
 990     {
 991         SPStyle *i_style = SP_OBJECT(item)->style;
 992         int jointype, captype;
 993
 994         jointype = i_style->stroke_linejoin.value;
 995         captype = i_style->stroke_linecap.value;
 996         o_width = i_style->stroke_width.computed;
 997         if (jointype == SP_STROKE_LINEJOIN_MITER)
 998         {
 999             o_join = join_pointy;
1000         }
1001         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
1002         {
1003             o_join = join_round;
1004         }
1005         else
1006         {
1007             o_join = join_straight;
1008         }
1009         if (captype == SP_STROKE_LINECAP_SQUARE)
1010         {
1011             o_butt = butt_square;
1012         }
1013         else if (captype == SP_STROKE_LINECAP_ROUND)
1014         {
1015             o_butt = butt_round;
1016         }
1017         else
1018         {
1019             o_butt = butt_straight;
1020         }
1021
1022         {
1023             double prefOffset = 1.0;
1024             prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", prefOffset);
1025             o_width = prefOffset;
1026         }
1027
1028         if (o_width < 0.01)
1029             o_width = 0.01;
1030         o_miter = i_style->stroke_miterlimit.value * o_width;
1031     }
1032
1033     Path *orig = Path_for_item(item, true, false);
1034     if (orig == NULL)
1035     {
1036         g_free(style);
1037         sp_curve_unref(curve);
1038         return;
1039     }
1040
1041     Path *res = new Path;
1042     res->SetBackData(false);
1043
1044     {
1045         Shape *theShape = new Shape;
1046         Shape *theRes = new Shape;
1047
1048         orig->ConvertWithBackData(1.0);
1049         orig->Fill(theShape, 0);
1050
1051         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1052         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1053         if (val && strcmp(val, "nonzero") == 0)
1054         {
1055             theRes->ConvertToShape(theShape, fill_nonZero);
1056         }
1057         else if (val && strcmp(val, "evenodd") == 0)
1058         {
1059             theRes->ConvertToShape(theShape, fill_oddEven);
1060         }
1061         else
1062         {
1063             theRes->ConvertToShape(theShape, fill_nonZero);
1064         }
1065
1066         Path *originaux[1];
1067         originaux[0] = orig;
1068         theRes->ConvertToForme(res, 1, originaux);
1069
1070         delete theShape;
1071         delete theRes;
1072     }
1073
1074     sp_curve_unref(curve);
1075
1076     if (res->descr_cmd.size() <= 1)
1077     {
1078         // pas vraiment de points sur le resultat
1079         // donc il ne reste rien
1080         sp_document_done(sp_desktop_document(desktop),
1081                          (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1082                           : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1083                          (updating ? _("Create linked offset")
1084                           : _("Create dynamic offset")));
1085         selection->clear();
1086
1087         delete res;
1088         delete orig;
1089         g_free(style);
1090         return;
1091     }
1092
1093     {
1094         gchar tstr[80];
1095
1096         tstr[79] = '\0';
1097
1098         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1099         repr = xml_doc->createElement("svg:path");
1100         repr->setAttribute("sodipodi:type", "inkscape:offset");
1101         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1102                                                           ? o_width
1103                                                           : expand < 0
1104                                                           ? -o_width
1105                                                           : 0 ));
1106
1107         str = res->svg_dump_path();
1108         repr->setAttribute("inkscape:original", str);
1109         g_free(str);
1110
1111         if ( updating ) {
1112             char const *id = SP_OBJECT(item)->repr->attribute("id");
1113             char const *uri = g_strdup_printf("#%s", id);
1114             repr->setAttribute("xlink:href", uri);
1115             g_free((void *) uri);
1116         } else {
1117             repr->setAttribute("inkscape:href", NULL);
1118         }
1119
1120         repr->setAttribute("style", style);
1121
1122         // add the new repr to the parent
1123         parent->appendChild(repr);
1124
1125         // move to the saved position
1126         repr->setPosition(pos > 0 ? pos : 0);
1127
1128         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1129
1130         if ( updating ) {
1131             // on conserve l'original
1132             // we reapply the transform to the original (offset will feel it)
1133             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1134         } else {
1135             // delete original, apply the transform to the offset
1136             SP_OBJECT(item)->deleteObject(false);
1137             sp_item_write_transform(nitem, repr, transform);
1138         }
1139
1140         // The object just created from a temporary repr is only a seed.
1141         // We need to invoke its write which will update its real repr (in particular adding d=)
1142         SP_OBJECT(nitem)->updateRepr();
1143
1144         Inkscape::GC::release(repr);
1145
1146         selection->set(nitem);
1147     }
1148
1149     sp_document_done(sp_desktop_document(desktop),
1150                      (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1151                       : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1152                      (updating ? _("Create linked offset")
1153                       : _("Create dynamic offset")));
1154
1155     delete res;
1156     delete orig;
1157
1158     g_free(style);
1159 }
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172 void
1173 sp_selected_path_do_offset(bool expand, double prefOffset)
1174 {
1175     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1176
1177     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1178
1179     if (selection->isEmpty()) {
1180         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1181         return;
1182     }
1183
1184     bool did = false;
1185
1186     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1187          items != NULL;
1188          items = items->next) {
1189
1190         SPItem *item = (SPItem *) items->data;
1191
1192         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1193             continue;
1194
1195         SPCurve *curve = NULL;
1196         if (SP_IS_SHAPE(item)) {
1197             curve = sp_shape_get_curve(SP_SHAPE(item));
1198             if (curve == NULL)
1199                 continue;
1200         }
1201         if (SP_IS_TEXT(item)) {
1202             curve = SP_TEXT(item)->getNormalizedBpath();
1203             if (curve == NULL)
1204                 continue;
1205         }
1206
1207         NR::Matrix const transform(item->transform);
1208
1209         sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1210
1211         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1212
1213         float o_width, o_miter;
1214         JoinType o_join;
1215         ButtType o_butt;
1216
1217         {
1218             SPStyle *i_style = SP_OBJECT(item)->style;
1219             int jointype, captype;
1220
1221             jointype = i_style->stroke_linejoin.value;
1222             captype = i_style->stroke_linecap.value;
1223             o_width = i_style->stroke_width.computed;
1224
1225             switch (jointype) {
1226                 case SP_STROKE_LINEJOIN_MITER:
1227                     o_join = join_pointy;
1228                     break;
1229                 case SP_STROKE_LINEJOIN_ROUND:
1230                     o_join = join_round;
1231                     break;
1232                 default:
1233                     o_join = join_straight;
1234                     break;
1235             }
1236
1237             switch (captype) {
1238                 case SP_STROKE_LINECAP_SQUARE:
1239                     o_butt = butt_square;
1240                     break;
1241                 case SP_STROKE_LINECAP_ROUND:
1242                     o_butt = butt_round;
1243                     break;
1244                 default:
1245                     o_butt = butt_straight;
1246                     break;
1247             }
1248
1249             o_width = prefOffset;
1250
1251             if (o_width < 0.1)
1252                 o_width = 0.1;
1253             o_miter = i_style->stroke_miterlimit.value * o_width;
1254         }
1255
1256         Path *orig = Path_for_item(item, false);
1257         if (orig == NULL) {
1258             g_free(style);
1259             sp_curve_unref(curve);
1260             continue;
1261         }
1262
1263         Path *res = new Path;
1264         res->SetBackData(false);
1265
1266         {
1267             Shape *theShape = new Shape;
1268             Shape *theRes = new Shape;
1269
1270             orig->ConvertWithBackData(0.03);
1271             orig->Fill(theShape, 0);
1272
1273             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1274             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1275             if (val && strcmp(val, "nonzero") == 0)
1276             {
1277                 theRes->ConvertToShape(theShape, fill_nonZero);
1278             }
1279             else if (val && strcmp(val, "evenodd") == 0)
1280             {
1281                 theRes->ConvertToShape(theShape, fill_oddEven);
1282             }
1283             else
1284             {
1285                 theRes->ConvertToShape(theShape, fill_nonZero);
1286             }
1287
1288             // et maintenant: offset
1289             // methode inexacte
1290 /*                      Path *originaux[1];
1291                         originaux[0] = orig;
1292                         theRes->ConvertToForme(res, 1, originaux);
1293
1294                         if (expand) {
1295                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1296                         } else {
1297                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1298                         }
1299
1300                         orig->ConvertWithBackData(1.0);
1301                         orig->Fill(theShape, 0);
1302                         theRes->ConvertToShape(theShape, fill_positive);
1303                         originaux[0] = orig;
1304                         theRes->ConvertToForme(res, 1, originaux);
1305
1306                         if (o_width >= 0.5) {
1307                         //     res->Coalesce(1.0);
1308                         res->ConvertEvenLines(1.0);
1309                         res->Simplify(1.0);
1310                         } else {
1311                         //      res->Coalesce(o_width);
1312                         res->ConvertEvenLines(1.0*o_width);
1313                         res->Simplify(1.0 * o_width);
1314                         }    */
1315             // methode par makeoffset
1316
1317             if (expand)
1318             {
1319                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1320             }
1321             else
1322             {
1323                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1324             }
1325             theRes->ConvertToShape(theShape, fill_positive);
1326
1327             res->Reset();
1328             theRes->ConvertToForme(res);
1329
1330             if (o_width >= 1.0)
1331             {
1332                 res->ConvertEvenLines(1.0);
1333                 res->Simplify(1.0);
1334             }
1335             else
1336             {
1337                 res->ConvertEvenLines(1.0*o_width);
1338                 res->Simplify(1.0 * o_width);
1339             }
1340
1341             delete theShape;
1342             delete theRes;
1343         }
1344
1345         did = true;
1346
1347         sp_curve_unref(curve);
1348         // remember the position of the item
1349         gint pos = SP_OBJECT_REPR(item)->position();
1350         // remember parent
1351         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1352         // remember id
1353         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1354
1355         selection->remove(item);
1356         SP_OBJECT(item)->deleteObject(false);
1357
1358         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1359
1360             gchar tstr[80];
1361
1362             tstr[79] = '\0';
1363
1364             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1365             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1366
1367             repr->setAttribute("style", style);
1368
1369             gchar *str = res->svg_dump_path();
1370             repr->setAttribute("d", str);
1371             g_free(str);
1372
1373             // add the new repr to the parent
1374             parent->appendChild(repr);
1375
1376             // move to the saved position
1377             repr->setPosition(pos > 0 ? pos : 0);
1378
1379             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1380
1381             // reapply the transform
1382             sp_item_write_transform(newitem, repr, transform);
1383
1384             repr->setAttribute("id", id);
1385
1386             selection->add(repr);
1387
1388             Inkscape::GC::release(repr);
1389         }
1390
1391         delete orig;
1392         delete res;
1393     }
1394
1395     if (did) {
1396         sp_document_done(sp_desktop_document(desktop),
1397                          (expand ? SP_VERB_SELECTION_OFFSET : SP_VERB_SELECTION_INSET),
1398                          (expand ? _("Outset path") : _("Inset path")));
1399     } else {
1400         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1401         return;
1402     }
1403 }
1404
1405
1406 static bool
1407 sp_selected_path_simplify_items(SPDesktop *desktop,
1408                                 Inkscape::Selection *selection, GSList *items,
1409                                 float threshold,  bool justCoalesce,
1410                                 float angleLimit, bool breakableAngles,
1411                                 bool modifySelection);
1412
1413
1414 //return true if we changed something, else false
1415 bool
1416 sp_selected_path_simplify_item(SPDesktop *desktop,
1417                  Inkscape::Selection *selection, SPItem *item,
1418                  float threshold,  bool justCoalesce,
1419                  float angleLimit, bool breakableAngles,
1420                  gdouble size,     bool modifySelection)
1421 {
1422     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1423         return false;
1424
1425     //If this is a group, do the children instead
1426     if (SP_IS_GROUP(item)) {
1427         GSList *items = sp_item_group_item_list(SP_GROUP(item));
1428
1429         return sp_selected_path_simplify_items(desktop, selection, items,
1430                                                threshold, justCoalesce,
1431                                                angleLimit, breakableAngles,
1432                                                false);
1433     }
1434
1435
1436     SPCurve *curve = NULL;
1437
1438     if (SP_IS_SHAPE(item)) {
1439         curve = sp_shape_get_curve(SP_SHAPE(item));
1440         if (!curve)
1441             return false;
1442     }
1443
1444     if (SP_IS_TEXT(item)) {
1445         curve = SP_TEXT(item)->getNormalizedBpath();
1446         if (!curve)
1447             return false;
1448     }
1449
1450     // save the transform, to re-apply it after simplification
1451     NR::Matrix const transform(item->transform);
1452
1453     /*
1454        reset the transform, effectively transforming the item by transform.inverse();
1455        this is necessary so that the item is transformed twice back and forth,
1456        allowing all compensations to cancel out regardless of the preferences
1457     */
1458     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1459
1460     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1461     gchar *mask = g_strdup(SP_OBJECT_REPR(item)->attribute("mask"));
1462     gchar *clip_path = g_strdup(SP_OBJECT_REPR(item)->attribute("clip-path"));
1463
1464     Path *orig = Path_for_item(item, false);
1465     if (orig == NULL) {
1466         g_free(style);
1467         sp_curve_unref(curve);
1468         return false;
1469     }
1470
1471     sp_curve_unref(curve);
1472     // remember the position of the item
1473     gint pos = SP_OBJECT_REPR(item)->position();
1474     // remember parent
1475     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1476     // remember id
1477     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1478
1479     //If a group was selected, to not change the selection list
1480     if (modifySelection)
1481         selection->remove(item);
1482
1483     SP_OBJECT(item)->deleteObject(false);
1484
1485     if ( justCoalesce ) {
1486         orig->Coalesce(threshold * size);
1487     } else {
1488         orig->ConvertEvenLines(threshold * size);
1489         orig->Simplify(threshold * size);
1490     }
1491
1492     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1493     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1494
1495     // restore style, mask and clip-path
1496     repr->setAttribute("style", style);
1497     g_free(style);
1498
1499     if ( mask ) {
1500         repr->setAttribute("mask", mask);
1501         g_free(mask);
1502     }
1503
1504     if ( clip_path ) {
1505         repr->setAttribute("clip-path", clip_path);
1506         g_free(clip_path);
1507     }
1508
1509     // path
1510     gchar *str = orig->svg_dump_path();
1511     repr->setAttribute("d", str);
1512     g_free(str);
1513
1514     // restore id
1515     repr->setAttribute("id", id);
1516
1517     // add the new repr to the parent
1518     parent->appendChild(repr);
1519
1520     // move to the saved position
1521     repr->setPosition(pos > 0 ? pos : 0);
1522
1523     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1524
1525     // reapply the transform
1526     sp_item_write_transform(newitem, repr, transform);
1527
1528     //If we are not in a selected group
1529     if (modifySelection)
1530         selection->add(repr);
1531
1532     Inkscape::GC::release(repr);
1533
1534     // clean up
1535     if (orig) delete orig;
1536
1537     return true;
1538 }
1539
1540
1541 bool
1542 sp_selected_path_simplify_items(SPDesktop *desktop,
1543                                 Inkscape::Selection *selection, GSList *items,
1544                                 float threshold,  bool justCoalesce,
1545                                 float angleLimit, bool breakableAngles,
1546                                 bool modifySelection)
1547 {
1548   bool simplifyIndividualPaths =
1549     (bool) prefs_get_int_attribute("options.simplifyindividualpaths", "value", 0);
1550
1551   gchar *simplificationType;
1552   if (simplifyIndividualPaths) {
1553     simplificationType = "individual paths";
1554   } else {
1555     simplificationType = "as a group";
1556   }
1557
1558   bool didSomething = false;
1559
1560   NR::Rect selectionBbox = selection->bounds();
1561   gdouble selectionSize  = L2(selectionBbox.dimensions());
1562
1563   gdouble simplifySize  = selectionSize;
1564
1565   int pathsSimplified = 0;
1566   int totalPathCount  = g_slist_length(items);
1567
1568   desktop->disableInteraction();
1569
1570   for (; items != NULL; items = items->next) {
1571       SPItem *item = (SPItem *) items->data;
1572
1573       if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1574           continue;
1575
1576       if (simplifyIndividualPaths) {
1577           NR::Rect itemBbox = item->invokeBbox(sp_item_i2d_affine(item));
1578           simplifySize      = L2(itemBbox.dimensions());
1579       }
1580
1581
1582       pathsSimplified++;
1583
1584       if (pathsSimplified % 20 == 0) {
1585         gchar *message = g_strdup_printf(_("Simplifying %s - <b>%d</b> of <b>%d</b> paths simplified..."), simplificationType, pathsSimplified, totalPathCount);
1586         desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, message);
1587         desktop->updateCanvasNow();
1588       }
1589
1590       didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1591                           threshold, justCoalesce, angleLimit, breakableAngles, simplifySize, modifySelection);
1592   }
1593
1594   desktop->enableInteraction();
1595
1596   if (pathsSimplified > 20) {
1597     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, g_strdup_printf(_("Done - <b>%d</b> paths simplified."), pathsSimplified));
1598   }
1599
1600   return didSomething;
1601 }
1602
1603 void
1604 sp_selected_path_simplify_selection(float threshold, bool justCoalesce,
1605                        float angleLimit, bool breakableAngles)
1606 {
1607     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1608
1609     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1610
1611     if (selection->isEmpty()) {
1612         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1613                          _("Select <b>path(s)</b> to simplify."));
1614         return;
1615     }
1616
1617     GSList *items = g_slist_copy((GSList *) selection->itemList());
1618
1619     bool didSomething = sp_selected_path_simplify_items(desktop, selection,
1620                                                         items, threshold,
1621                                                         justCoalesce,
1622                                                         angleLimit,
1623                                                         breakableAngles, true);
1624
1625     if (didSomething)
1626         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_SIMPLIFY,
1627                          _("Simplify"));
1628     else
1629         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1630
1631 }
1632
1633
1634 // globals for keeping track of accelerated simplify
1635 static double previousTime      = 0.0;
1636 static gdouble simplifyMultiply = 1.0;
1637
1638 void
1639 sp_selected_path_simplify(void)
1640 {
1641     gdouble simplifyThreshold =
1642         prefs_get_double_attribute("options.simplifythreshold", "value", 0.003);
1643     bool simplifyJustCoalesce =
1644         (bool) prefs_get_int_attribute("options.simplifyjustcoalesce", "value", 0);
1645
1646     //Get the current time
1647     GTimeVal currentTimeVal;
1648     g_get_current_time(&currentTimeVal);
1649     double currentTime = currentTimeVal.tv_sec * 1000000 +
1650                 currentTimeVal.tv_usec;
1651
1652     //Was the previous call to this function recent? (<0.5 sec)
1653     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1654
1655         // add to the threshold 1/2 of its original value
1656         simplifyMultiply  += 0.5;
1657         simplifyThreshold *= simplifyMultiply;
1658
1659     } else {
1660         // reset to the default
1661         simplifyMultiply = 1;
1662     }
1663
1664     //remember time for next call
1665     previousTime = currentTime;
1666
1667     //g_print("%g\n", simplify_threshold);
1668
1669     //Make the actual call
1670     sp_selected_path_simplify_selection(simplifyThreshold,
1671                       simplifyJustCoalesce, 0.0, false);
1672 }
1673
1674
1675
1676 // fonctions utilitaires
1677
1678 bool
1679 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1680 {
1681     if (who == NULL || a == NULL)
1682         return false;
1683     if (who == a)
1684         return true;
1685     return Ancetre(sp_repr_parent(a), who);
1686 }
1687
1688 Path *
1689 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1690 {
1691     SPCurve *curve;
1692
1693     if (!item)
1694         return NULL;
1695
1696     if (SP_IS_SHAPE(item))
1697     {
1698         curve = sp_shape_get_curve(SP_SHAPE(item));
1699     }
1700     else if (SP_IS_TEXT(item))
1701     {
1702         curve = SP_TEXT(item)->getNormalizedBpath();
1703     }
1704     else
1705     {
1706         curve = NULL;
1707     }
1708
1709     if (!curve)
1710         return NULL;
1711     NArtBpath *bpath = SP_CURVE_BPATH(curve);
1712     if (bpath == NULL)
1713         return NULL;
1714
1715     if ( doTransformation ) {
1716         if (transformFull)
1717             bpath = nr_artpath_affine(SP_CURVE_BPATH(curve), sp_item_i2doc_affine(item));
1718         else
1719             bpath = nr_artpath_affine(SP_CURVE_BPATH(curve), item->transform);
1720         sp_curve_unref(curve);
1721         curve=NULL;
1722     } else {
1723         bpath=SP_CURVE_BPATH(curve);
1724     }
1725
1726     Path *dest = new Path;
1727     dest->SetBackData(false);
1728     {
1729         int   i;
1730         bool  closed = false;
1731         float lastX  = 0.0;
1732         float lastY  = 0.0;
1733
1734         for (i = 0; bpath[i].code != NR_END; i++) {
1735             switch (bpath[i].code) {
1736                 case NR_LINETO:
1737                     lastX = bpath[i].x3;
1738                     lastY = bpath[i].y3;
1739                     {
1740                         NR::Point tmp(lastX, lastY);
1741                         dest->LineTo(tmp);
1742                     }
1743                     break;
1744
1745                 case NR_CURVETO:
1746                 {
1747                     NR::Point tmp, tms, tme;
1748                     tmp[0]=bpath[i].x3;
1749                     tmp[1]=bpath[i].y3;
1750                     tms[0]=3 * (bpath[i].x1 - lastX);
1751                     tms[1]=3 * (bpath[i].y1 - lastY);
1752                     tme[0]=3 * (bpath[i].x3 - bpath[i].x2);
1753                     tme[1]=3 * (bpath[i].y3 - bpath[i].y2);
1754                     dest->CubicTo(tmp,tms,tme);
1755                 }
1756                 lastX = bpath[i].x3;
1757                 lastY = bpath[i].y3;
1758                 break;
1759
1760                 case NR_MOVETO_OPEN:
1761                 case NR_MOVETO:
1762                     if (closed)
1763                         dest->Close();
1764                     closed = (bpath[i].code == NR_MOVETO);
1765                     lastX = bpath[i].x3;
1766                     lastY = bpath[i].y3;
1767                     {
1768                         NR::Point  tmp(lastX, lastY);
1769                         dest->MoveTo(tmp);
1770                     }
1771                     break;
1772                 default:
1773                     break;
1774             }
1775         }
1776         if (closed)
1777             dest->Close();
1778     }
1779
1780     if ( doTransformation ) {
1781         if ( bpath ) g_free(bpath);
1782     } else {
1783         sp_curve_unref(curve);
1784     }
1785     return dest;
1786 }
1787
1788 NR::Maybe<Path::cut_position> get_nearest_position_on_Path(Path *path, NR::Point p)
1789 {
1790     //get nearest position on path
1791     Path::cut_position pos = path->PointToCurvilignPosition(p);
1792     return pos;
1793 }
1794
1795 NR::Point get_point_on_Path(Path *path, int piece, double t)
1796 {
1797     NR::Point p;
1798     path->PointAt(piece, t, p);
1799     return p;
1800 }
1801
1802
1803 /*
1804   Local Variables:
1805   mode:c++
1806   c-file-style:"stroustrup"
1807   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1808   indent-tabs-mode:nil
1809   fill-column:99
1810   End:
1811 */
1812 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :