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