src/splivarot.cpp

   1 #define __SP_LIVAROT_C__
   2 /*
   3  *  splivarot.cpp
   4  *  Inkscape
   5  *
   6  *  Created by fred on Fri Dec 05 2003.
   7  *  tweaked endlessly by bulia byak <buliabyak@users.sf.net>
   8  *  public domain
   9  *
  10  */
  11
  12 /*
  13  * contains lots of stitched pieces of path-chemistry.c
  14  */
  15
  16 #ifdef HAVE_CONFIG_H
  17 # include <config.h>
  18 #endif
  19
  20 #include <vector>
  21 #include <glib/gmem.h>
  22 #include "xml/repr.h"
  23 #include "svg/svg.h"
  24 #include "sp-path.h"
  25 #include "sp-shape.h"
  26 #include "sp-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     if (g_slist_length(il) < 2) {
 110         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 2 paths</b> to perform a boolean operation."));
 111         return;
 112     }
 113
 114     if (g_slist_length(il) > 2) {
 115         if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 116             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>exactly 2 paths</b> to perform difference, XOR, division, or path cut."));
 117             return;
 118         }
 119     }
 120
 121     // reverseOrderForOp marks whether the order of the list is the top->down order
 122     // it's only used when there are 2 objects, and for operations who need to know the
 123     // topmost object (differences, cuts)
 124     bool reverseOrderForOp = false;
 125
 126     // mettre les elements de la liste dans l'ordre pour ces operations
 127     if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice) {
 128         // check in the tree to find which element of the selection list is topmost (for 2-operand commands only)
 129         Inkscape::XML::Node *a = SP_OBJECT_REPR(il->data);
 130         Inkscape::XML::Node *b = SP_OBJECT_REPR(il->next->data);
 131
 132         if (a == NULL || b == NULL) {
 133             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."));
 134             return;
 135         }
 136
 137         if (Ancetre(a, b)) {
 138             // a is the parent of b, already in the proper order
 139         } else if (Ancetre(b, a)) {
 140             // reverse order
 141             reverseOrderForOp = true;
 142         } else {
 143
 144             // objects are not in parent/child relationship;
 145             // find their lowest common ancestor
 146             Inkscape::XML::Node *dad = LCA(a, b);
 147             if (dad == NULL) {
 148                 desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Unable to determine the <b>z-order</b> of the objects selected for difference, XOR, division, or path cut."));
 149                 return;
 150             }
 151
 152             // find the children of the LCA that lead from it to the a and b
 153             Inkscape::XML::Node *as = AncetreFils(a, dad);
 154             Inkscape::XML::Node *bs = AncetreFils(b, dad);
 155
 156             // find out which comes first
 157             for (Inkscape::XML::Node *child = dad->firstChild(); child; child = child->next()) {
 158                 if (child == as) {
 159                     /* a first, so reverse. */
 160                     reverseOrderForOp = true;
 161                     break;
 162                 }
 163                 if (child == bs)
 164                     break;
 165             }
 166         }
 167     }
 168
 169     il = g_slist_copy(il);
 170
 171     // first check if all the input objects have shapes
 172     // otherwise bail out
 173     for (GSList *l = il; l != NULL; l = l->next)
 174     {
 175         SPItem *item = SP_ITEM(l->data);
 176         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 177         {
 178             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("One of the objects is <b>not a path</b>, cannot perform boolean operation."));
 179             g_slist_free(il);
 180             return;
 181         }
 182     }
 183
 184     // extract the livarot Paths from the source objects
 185     // also get the winding rule specified in the style
 186     int nbOriginaux = g_slist_length(il);
 187     std::vector<Path *> originaux(nbOriginaux);
 188     std::vector<FillRule> origWind(nbOriginaux);
 189     int curOrig;
 190     {
 191         curOrig = 0;
 192         for (GSList *l = il; l != NULL; l = l->next)
 193         {
 194             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(il->data), "style");
 195             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 196             if (val && strcmp(val, "nonzero") == 0) {
 197                 origWind[curOrig]= fill_nonZero;
 198             } else if (val && strcmp(val, "evenodd") == 0) {
 199                 origWind[curOrig]= fill_oddEven;
 200             } else {
 201                 origWind[curOrig]= fill_nonZero;
 202             }
 203
 204             originaux[curOrig] = Path_for_item((SPItem *) l->data, true, true);
 205             if (originaux[curOrig] == NULL || originaux[curOrig]->descr_cmd.size() <= 1)
 206             {
 207                 for (int i = curOrig; i >= 0; i--) delete originaux[i];
 208                 g_slist_free(il);
 209                 return;
 210             }
 211             curOrig++;
 212         }
 213     }
 214     // reverse if needed
 215     // note that the selection list keeps its order
 216     if ( reverseOrderForOp ) {
 217         Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 218         FillRule swai=origWind[0]; origWind[0]=origWind[1]; origWind[1]=swai;
 219     }
 220
 221     // and work
 222     // some temporary instances, first
 223     Shape *theShapeA = new Shape;
 224     Shape *theShapeB = new Shape;
 225     Shape *theShape = new Shape;
 226     Path *res = new Path;
 227     res->SetBackData(false);
 228     Path::cut_position  *toCut=NULL;
 229     int                  nbToCut=0;
 230
 231     if ( bop == bool_op_inters || bop == bool_op_union || bop == bool_op_diff || bop == bool_op_symdiff ) {
 232         // true boolean op
 233         // get the polygons of each path, with the winding rule specified, and apply the operation iteratively
 234         originaux[0]->ConvertWithBackData(0.1);
 235
 236         originaux[0]->Fill(theShape, 0);
 237
 238         theShapeA->ConvertToShape(theShape, origWind[0]);
 239
 240         curOrig = 1;
 241         for (GSList *l = il->next; l != NULL; l = l->next) {
 242             originaux[curOrig]->ConvertWithBackData(0.1);
 243
 244             originaux[curOrig]->Fill(theShape, curOrig);
 245
 246             theShapeB->ConvertToShape(theShape, origWind[curOrig]);
 247
 248             // les elements arrivent en ordre inverse dans la liste
 249             theShape->Booleen(theShapeB, theShapeA, bop);
 250
 251             {
 252                 Shape *swap = theShape;
 253                 theShape = theShapeA;
 254                 theShapeA = swap;
 255             }
 256             curOrig++;
 257         }
 258
 259         {
 260             Shape *swap = theShape;
 261             theShape = theShapeA;
 262             theShapeA = swap;
 263         }
 264
 265     } else if ( bop == bool_op_cut ) {
 266         // cuts= sort of a bastard boolean operation, thus not the axact same modus operandi
 267         // technically, the cut path is not necessarily a polygon (thus has no winding rule)
 268         // it is just uncrossed, and cleaned from duplicate edges and points
 269         // then it's fed to Booleen() which will uncross it against the other path
 270         // then comes the trick: each edge of the cut path is duplicated (one in each direction),
 271         // thus making a polygon. the weight of the edges of the cut are all 0, but
 272         // the Booleen need to invert the ones inside the source polygon (for the subsequent
 273         // ConvertToForme)
 274
 275         // the cut path needs to have the highest pathID in the back data
 276         // that's how the Booleen() function knows it's an edge of the cut
 277
 278         // FIXME: this gives poor results, the final paths are full of extraneous nodes. Decreasing
 279         // ConvertWithBackData parameter below simply increases the number of nodes, so for now I
 280         // left it at 1.0. Investigate replacing this by a combination of difference and
 281         // intersection of the same two paths. -- bb
 282         {
 283             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 284             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 285         }
 286         originaux[0]->ConvertWithBackData(1.0);
 287
 288         originaux[0]->Fill(theShape, 0);
 289
 290         theShapeA->ConvertToShape(theShape, origWind[0]);
 291
 292         originaux[1]->ConvertWithBackData(1.0);
 293
 294         originaux[1]->Fill(theShape, 1,false,false,false); //do not closeIfNeeded
 295
 296         theShapeB->ConvertToShape(theShape, fill_justDont); // fill_justDont doesn't computes winding numbers
 297
 298         // les elements arrivent en ordre inverse dans la liste
 299         theShape->Booleen(theShapeB, theShapeA, bool_op_cut, 1);
 300
 301     } else if ( bop == bool_op_slice ) {
 302         // slice is not really a boolean operation
 303         // you just put the 2 shapes in a single polygon, uncross it
 304         // the points where the degree is > 2 are intersections
 305         // just check it's an intersection on the path you want to cut, and keep it
 306         // the intersections you have found are then fed to ConvertPositionsToMoveTo() which will
 307         // make new subpath at each one of these positions
 308         // inversion pour l'op\8eration
 309         {
 310             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 311             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 312         }
 313         originaux[0]->ConvertWithBackData(1.0);
 314
 315         originaux[0]->Fill(theShapeA, 0,false,false,false); // don't closeIfNeeded
 316
 317         originaux[1]->ConvertWithBackData(1.0);
 318
 319         originaux[1]->Fill(theShapeA, 1,true,false,false);// don't closeIfNeeded and just dump in the shape, don't reset it
 320
 321         theShape->ConvertToShape(theShapeA, fill_justDont);
 322
 323         if ( theShape->hasBackData() ) {
 324             // should always be the case, but ya never know
 325             {
 326                 for (int i = 0; i < theShape->numberOfPoints(); i++) {
 327                     if ( theShape->getPoint(i).totalDegree() > 2 ) {
 328                         // possibly an intersection
 329                         // we need to check that at least one edge from the source path is incident to it
 330                         // before we declare it's an intersection
 331                         int cb = theShape->getPoint(i).incidentEdge[FIRST];
 332                         int   nbOrig=0;
 333                         int   nbOther=0;
 334                         int   piece=-1;
 335                         float t=0.0;
 336                         while ( cb >= 0 && cb < theShape->numberOfEdges() ) {
 337                             if ( theShape->ebData[cb].pathID == 0 ) {
 338                                 // the source has an edge incident to the point, get its position on the path
 339                                 piece=theShape->ebData[cb].pieceID;
 340                                 if ( theShape->getEdge(cb).st == i ) {
 341                                     t=theShape->ebData[cb].tSt;
 342                                 } else {
 343                                     t=theShape->ebData[cb].tEn;
 344                                 }
 345                                 nbOrig++;
 346                             }
 347                             if ( theShape->ebData[cb].pathID == 1 ) nbOther++; // the cut is incident to this point
 348                             cb=theShape->NextAt(i, cb);
 349                         }
 350                         if ( nbOrig > 0 && nbOther > 0 ) {
 351                             // point incident to both path and cut: an intersection
 352                             // note that you only keep one position on the source; you could have degenerate
 353                             // cases where the source crosses itself at this point, and you wouyld miss an intersection
 354                             toCut=(Path::cut_position*)realloc(toCut, (nbToCut+1)*sizeof(Path::cut_position));
 355                             toCut[nbToCut].piece=piece;
 356                             toCut[nbToCut].t=t;
 357                             nbToCut++;
 358                         }
 359                     }
 360                 }
 361             }
 362             {
 363                 // i think it's useless now
 364                 int i = theShape->numberOfEdges() - 1;
 365                 for (;i>=0;i--) {
 366                     if ( theShape->ebData[i].pathID == 1 ) {
 367                         theShape->SubEdge(i);
 368                     }
 369                 }
 370             }
 371
 372         }
 373     }
 374
 375     int*    nesting=NULL;
 376     int*    conts=NULL;
 377     int     nbNest=0;
 378     // pour compenser le swap juste avant
 379     if ( bop == bool_op_slice ) {
 380 //    theShape->ConvertToForme(res, nbOriginaux, originaux, true);
 381 //    res->ConvertForcedToMoveTo();
 382         res->Copy(originaux[0]);
 383         res->ConvertPositionsToMoveTo(nbToCut, toCut); // cut where you found intersections
 384         free(toCut);
 385     } else if ( bop == bool_op_cut ) {
 386         // il faut appeler pour desallouer PointData (pas vital, mais bon)
 387         // the Booleen() function did not deallocated the point_data array in theShape, because this
 388         // function needs it.
 389         // this function uses the point_data to get the winding number of each path (ie: is a hole or not)
 390         // for later reconstruction in objects, you also need to extract which path is parent of holes (nesting info)
 391         theShape->ConvertToFormeNested(res, nbOriginaux, &originaux[0], 1, nbNest, nesting, conts);
 392     } else {
 393         theShape->ConvertToForme(res, nbOriginaux, &originaux[0]);
 394     }
 395
 396     delete theShape;
 397     delete theShapeA;
 398     delete theShapeB;
 399     for (int i = 0; i < nbOriginaux; i++)  delete originaux[i];
 400
 401     if (res->descr_cmd.size() <= 1)
 402     {
 403         // only one command, presumably a moveto: it isn't a path
 404         for (GSList *l = il; l != NULL; l = l->next)
 405         {
 406             SP_OBJECT(l->data)->deleteObject();
 407         }
 408         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 409                          /* TODO: annotate */ "splivarot.cpp:409");
 410         selection->clear();
 411
 412         delete res;
 413         g_slist_free(il);
 414         return;
 415     }
 416
 417     // remember important aspects of the source path, to be restored
 418     Inkscape::XML::Node *repr_source;
 419     if ( bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 420         if (reverseOrderForOp) {
 421              repr_source = SP_OBJECT_REPR(il->data);
 422         } else {
 423              repr_source = SP_OBJECT_REPR(il->next->data);
 424         }
 425     } else {
 426         // find out the bottom object
 427         GSList *sorted = g_slist_copy((GSList *) selection->reprList());
 428
 429         sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
 430         repr_source = ((Inkscape::XML::Node *) sorted->data);
 431         g_slist_free(sorted);
 432     }
 433     gint pos = repr_source->position();
 434     Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
 435     char const *id = repr_source->attribute("id");
 436     char const *style = repr_source->attribute("style");
 437
 438
 439     // remove source paths
 440     selection->clear();
 441     for (GSList *l = il; l != NULL; l = l->next) {
 442         // if this is the bottommost object,
 443         if (!strcmp(SP_OBJECT_REPR(l->data)->attribute("id"), id)) {
 444             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 445             SP_OBJECT(l->data)->deleteObject(false);
 446         } else {
 447             // delete the object for real, so that its clones can take appropriate action
 448             SP_OBJECT(l->data)->deleteObject();
 449         }
 450     }
 451     g_slist_free(il);
 452
 453     // premultiply by the inverse of parent's repr
 454     SPItem *parent_item = SP_ITEM(sp_desktop_document(desktop)->getObjectByRepr(parent));
 455     NR::Matrix local = sp_item_i2doc_affine(parent_item);
 456     gchar affinestr[80];
 457     gchar *transform = NULL;
 458     if (!local.test_identity() && sp_svg_transform_write(affinestr, 79, local.inverse())) {
 459         transform = affinestr;
 460     }
 461
 462     // now that we have the result, add it on the canvas
 463     if ( bop == bool_op_cut || bop == bool_op_slice ) {
 464         int    nbRP=0;
 465         Path** resPath;
 466         if ( bop == bool_op_slice ) {
 467             // there are moveto's at each intersection, but it's still one unique path
 468             // so break it down and add each subpath independently
 469             // we could call break_apart to do this, but while we have the description...
 470             resPath=res->SubPaths(nbRP, false);
 471         } else {
 472             // cut operation is a bit wicked: you need to keep holes
 473             // that's why you needed the nesting
 474             // ConvertToFormeNested() dumped all the subpath in a single Path "res", so we need
 475             // to get the path for each part of the polygon. that's why you need the nesting info:
 476             // to know in wich subpath to add a subpath
 477             resPath=res->SubPathsWithNesting(nbRP, true, nbNest, nesting, conts);
 478
 479             // cleaning
 480             if ( conts ) free(conts);
 481             if ( nesting ) free(nesting);
 482         }
 483
 484         // add all the pieces resulting from cut or slice
 485         for (int i=0;i<nbRP;i++) {
 486             gchar *d = resPath[i]->svg_dump_path();
 487
 488             Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 489             repr->setAttribute("style", style);
 490             repr->setAttribute("d", d);
 491             g_free(d);
 492
 493             // for slice, remove fill
 494             if (bop == bool_op_slice) {
 495                 SPCSSAttr *css;
 496
 497                 css = sp_repr_css_attr_new();
 498                 sp_repr_css_set_property(css, "fill", "none");
 499
 500                 sp_repr_css_change(repr, css, "style");
 501
 502                 sp_repr_css_attr_unref(css);
 503             }
 504
 505             // we assign the same id on all pieces, but it on adding to document, it will be changed on all except one
 506             // this means it's basically random which of the pieces inherits the original's id and clones
 507             // a better algorithm might figure out e.g. the biggest piece
 508             repr->setAttribute("id", id);
 509
 510             repr->setAttribute("transform", transform);
 511
 512             // add the new repr to the parent
 513             parent->appendChild(repr);
 514
 515             // move to the saved position
 516             repr->setPosition(pos > 0 ? pos : 0);
 517
 518             selection->add(repr);
 519             Inkscape::GC::release(repr);
 520
 521             delete resPath[i];
 522         }
 523         if ( resPath ) free(resPath);
 524
 525     } else {
 526         gchar *d = res->svg_dump_path();
 527
 528         Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 529         repr->setAttribute("style", style);
 530
 531         repr->setAttribute("d", d);
 532         g_free(d);
 533
 534         repr->setAttribute("transform", transform);
 535
 536         repr->setAttribute("id", id);
 537         parent->appendChild(repr);
 538         repr->setPosition(pos > 0 ? pos : 0);
 539
 540         selection->add(repr);
 541         Inkscape::GC::release(repr);
 542     }
 543
 544     sp_document_done(sp_desktop_document(desktop), verb, description);
 545
 546     delete res;
 547 }
 548
 549
 550 void
 551 sp_selected_path_outline()
 552 {
 553     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 554
 555     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 556
 557     if (selection->isEmpty()) {
 558         // TRANSLATORS: "to outline" means "to convert stroke to path"
 559         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to outline."));
 560         return;
 561     }
 562
 563     bool did = false;
 564
 565     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 566          items != NULL;
 567          items = items->next) {
 568
 569         SPItem *item = (SPItem *) items->data;
 570
 571         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 572             continue;
 573
 574         SPCurve *curve = NULL;
 575         if (SP_IS_SHAPE(item)) {
 576             curve = sp_shape_get_curve(SP_SHAPE(item));
 577             if (curve == NULL)
 578                 continue;
 579         }
 580         if (SP_IS_TEXT(item)) {
 581             curve = SP_TEXT(item)->getNormalizedBpath();
 582             if (curve == NULL)
 583                 continue;
 584         }
 585
 586         {   // pas de stroke pas de chocolat
 587             SPCSSAttr *css = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 588             gchar const *val = sp_repr_css_property(css, "stroke", NULL);
 589
 590             if (val == NULL || strcmp(val, "none") == 0) {
 591                 sp_curve_unref(curve);
 592                 continue;
 593             }
 594         }
 595
 596         // remember old stroke style, to be set on fill
 597         SPCSSAttr *ncss;
 598         {
 599             SPCSSAttr *ocss = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 600             gchar const *val = sp_repr_css_property(ocss, "stroke", NULL);
 601             gchar const *opac = sp_repr_css_property(ocss, "stroke-opacity", NULL);
 602
 603             ncss = sp_repr_css_attr_new();
 604
 605             sp_repr_css_set_property(ncss, "stroke", "none");
 606             sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
 607             sp_repr_css_set_property(ncss, "fill", val);
 608             if ( opac ) {
 609                 sp_repr_css_set_property(ncss, "fill-opacity", opac);
 610             } else {
 611                 sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
 612             }
 613             sp_repr_css_unset_property(ncss, "marker-start");
 614             sp_repr_css_unset_property(ncss, "marker-mid");
 615             sp_repr_css_unset_property(ncss, "marker-end");
 616         }
 617
 618         NR::Matrix const transform(item->transform);
 619         float const scale = transform.expansion();
 620         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
 621         SPStyle *i_style = SP_OBJECT(item)->style;
 622
 623         float o_width, o_miter;
 624         JoinType o_join;
 625         ButtType o_butt;
 626
 627         {
 628             int jointype, captype;
 629
 630             jointype = i_style->stroke_linejoin.computed;
 631             captype = i_style->stroke_linecap.computed;
 632             o_width = i_style->stroke_width.computed;
 633
 634             switch (jointype) {
 635                 case SP_STROKE_LINEJOIN_MITER:
 636                     o_join = join_pointy;
 637                     break;
 638                 case SP_STROKE_LINEJOIN_ROUND:
 639                     o_join = join_round;
 640                     break;
 641                 default:
 642                     o_join = join_straight;
 643                     break;
 644             }
 645
 646             switch (captype) {
 647                 case SP_STROKE_LINECAP_SQUARE:
 648                     o_butt = butt_square;
 649                     break;
 650                 case SP_STROKE_LINECAP_ROUND:
 651                     o_butt = butt_round;
 652                     break;
 653                 default:
 654                     o_butt = butt_straight;
 655                     break;
 656             }
 657
 658             if (o_width < 0.1)
 659                 o_width = 0.1;
 660             o_miter = i_style->stroke_miterlimit.value * o_width;
 661         }
 662
 663         Path *orig = Path_for_item(item, false);
 664         if (orig == NULL) {
 665             g_free(style);
 666             sp_curve_unref(curve);
 667             continue;
 668         }
 669
 670         Path *res = new Path;
 671         res->SetBackData(false);
 672
 673         if (i_style->stroke_dash.n_dash) {
 674             // For dashed strokes, use Stroke method, because Outline can't do dashes
 675             // However Stroke adds lots of extra nodes _or_ makes the path crooked, so consider this a temporary workaround
 676
 677             orig->ConvertWithBackData(0.1);
 678
 679             orig->DashPolylineFromStyle(i_style, scale, 0);
 680
 681             Shape* theShape = new Shape;
 682             orig->Stroke(theShape, false, 0.5*o_width, o_join, o_butt,
 683                          0.5 * o_miter);
 684             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 685
 686             Shape *theRes = new Shape;
 687
 688             theRes->ConvertToShape(theShape, fill_positive);
 689
 690             Path *originaux[1];
 691             originaux[0] = res;
 692             theRes->ConvertToForme(orig, 1, originaux);
 693
 694             res->Coalesce(5.0);
 695
 696             delete theShape;
 697             delete theRes;
 698
 699         } else {
 700
 701             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 702
 703             orig->Coalesce(0.5 * o_width);
 704
 705             Shape *theShape = new Shape;
 706             Shape *theRes = new Shape;
 707
 708             res->ConvertWithBackData(1.0);
 709             res->Fill(theShape, 0);
 710             theRes->ConvertToShape(theShape, fill_positive);
 711
 712             Path *originaux[1];
 713             originaux[0] = res;
 714             theRes->ConvertToForme(orig, 1, originaux);
 715
 716             delete theShape;
 717             delete theRes;
 718         }
 719
 720         if (orig->descr_cmd.size() <= 1) {
 721             // ca a merd\8e, ou bien le resultat est vide
 722             delete res;
 723             delete orig;
 724             g_free(style);
 725             continue;
 726         }
 727
 728         did = true;
 729
 730         // remember the position of the item
 731         gint pos = SP_OBJECT_REPR(item)->position();
 732         // remember parent
 733         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 734         // remember id
 735         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 736
 737         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
 738
 739             Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 740
 741             // restore old style
 742             repr->setAttribute("style", style);
 743
 744             // set old stroke style on fill
 745             sp_repr_css_change(repr, ncss, "style");
 746
 747             sp_repr_css_attr_unref(ncss);
 748
 749             gchar *str = orig->svg_dump_path();
 750             repr->setAttribute("d", str);
 751             g_free(str);
 752
 753
 754             if (SP_IS_SHAPE(item) && sp_shape_has_markers (SP_SHAPE(item))) {
 755
 756                 Inkscape::XML::Node *g_repr = sp_repr_new("svg:g");
 757
 758                 // add the group to the parent
 759                 parent->appendChild(g_repr);
 760                 // move to the saved position
 761                 g_repr->setPosition(pos > 0 ? pos : 0);
 762
 763                 g_repr->appendChild(repr);
 764                 repr->setAttribute("id", id);
 765                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 766                 sp_item_write_transform(newitem, repr, transform);
 767
 768                 SPShape *shape = SP_SHAPE(item);
 769
 770                 for (NArtBpath* bp = SP_CURVE_BPATH(shape->curve); bp->code != NR_END; bp++) {
 771                     for (int m = SP_MARKER_LOC_START; m < SP_MARKER_LOC_QTY; m++) {
 772                         if (sp_shape_marker_required (shape, m, bp)) {
 773
 774                             SPMarker* marker = SP_MARKER (shape->marker[m]);
 775                             SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[m]));
 776
 777                             NR::Matrix tr(sp_shape_marker_get_transform(shape, bp));
 778
 779                             if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
 780                                 tr = NR::scale(i_style->stroke_width.computed) * tr;
 781                             }
 782
 783                             // total marker transform
 784                             tr = marker_item->transform * marker->c2p * tr * transform;
 785
 786                             if (SP_OBJECT_REPR(marker_item)) {
 787                                 Inkscape::XML::Node *m_repr = SP_OBJECT_REPR(marker_item)->duplicate();
 788                                 g_repr->appendChild(m_repr);
 789                                 SPItem *marker_item = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(m_repr);
 790                                 sp_item_write_transform(marker_item, m_repr, tr);
 791                             }
 792                         }
 793                     }
 794                 }
 795
 796
 797                 selection->add(g_repr);
 798
 799                 Inkscape::GC::release(g_repr);
 800
 801
 802             } else {
 803
 804                 // add the new repr to the parent
 805                 parent->appendChild(repr);
 806
 807                 // move to the saved position
 808                 repr->setPosition(pos > 0 ? pos : 0);
 809
 810                 repr->setAttribute("id", id);
 811
 812                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 813                 sp_item_write_transform(newitem, repr, transform);
 814
 815                 selection->add(repr);
 816
 817             }
 818
 819             Inkscape::GC::release(repr);
 820
 821             sp_curve_unref(curve);
 822             selection->remove(item);
 823             SP_OBJECT(item)->deleteObject(false);
 824
 825         }
 826
 827         delete res;
 828         delete orig;
 829         g_free(style);
 830
 831     }
 832
 833     if (did) {
 834         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_OUTLINE,
 835                          /* TODO: annotate */ "splivarot.cpp:846");
 836     } else {
 837         // TRANSLATORS: "to outline" means "to convert stroke to path"
 838         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> to outline in the selection."));
 839         return;
 840     }
 841 }
 842
 843
 844 void
 845 sp_selected_path_offset()
 846 {
 847     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 848
 849     sp_selected_path_do_offset(true, prefOffset);
 850 }
 851 void
 852 sp_selected_path_inset()
 853 {
 854     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 855
 856     sp_selected_path_do_offset(false, prefOffset);
 857 }
 858
 859 void
 860 sp_selected_path_offset_screen(double pixels)
 861 {
 862     sp_selected_path_do_offset(true,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 863 }
 864
 865 void
 866 sp_selected_path_inset_screen(double pixels)
 867 {
 868     sp_selected_path_do_offset(false,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 869 }
 870
 871
 872 void sp_selected_path_create_offset_object_zero()
 873 {
 874     sp_selected_path_create_offset_object(0, false);
 875 }
 876
 877 void sp_selected_path_create_offset()
 878 {
 879     sp_selected_path_create_offset_object(1, false);
 880 }
 881 void sp_selected_path_create_inset()
 882 {
 883     sp_selected_path_create_offset_object(-1, false);
 884 }
 885
 886 void sp_selected_path_create_updating_offset_object_zero()
 887 {
 888     sp_selected_path_create_offset_object(0, true);
 889 }
 890
 891 void sp_selected_path_create_updating_offset()
 892 {
 893     sp_selected_path_create_offset_object(1, true);
 894 }
 895 void sp_selected_path_create_updating_inset()
 896 {
 897     sp_selected_path_create_offset_object(-1, true);
 898 }
 899
 900 void
 901 sp_selected_path_create_offset_object(int expand, bool updating)
 902 {
 903     Inkscape::Selection *selection;
 904     Inkscape::XML::Node *repr;
 905     SPItem *item;
 906     SPCurve *curve;
 907     gchar *style, *str;
 908     SPDesktop *desktop;
 909     float o_width, o_miter;
 910     JoinType o_join;
 911     ButtType o_butt;
 912
 913     curve = NULL;
 914
 915     desktop = SP_ACTIVE_DESKTOP;
 916
 917     selection = sp_desktop_selection(desktop);
 918
 919     item = selection->singleItem();
 920
 921     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
 922         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
 923         return;
 924     }
 925     if (SP_IS_SHAPE(item))
 926     {
 927         curve = sp_shape_get_curve(SP_SHAPE(item));
 928         if (curve == NULL)
 929             return;
 930     }
 931     if (SP_IS_TEXT(item))
 932     {
 933         curve = SP_TEXT(item)->getNormalizedBpath();
 934         if (curve == NULL)
 935             return;
 936     }
 937
 938     NR::Matrix const transform(item->transform);
 939
 940     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
 941
 942     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
 943
 944     // remember the position of the item
 945     gint pos = SP_OBJECT_REPR(item)->position();
 946     // remember parent
 947     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 948
 949     {
 950         SPStyle *i_style = SP_OBJECT(item)->style;
 951         int jointype, captype;
 952
 953         jointype = i_style->stroke_linejoin.value;
 954         captype = i_style->stroke_linecap.value;
 955         o_width = i_style->stroke_width.computed;
 956         if (jointype == SP_STROKE_LINEJOIN_MITER)
 957         {
 958             o_join = join_pointy;
 959         }
 960         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
 961         {
 962             o_join = join_round;
 963         }
 964         else
 965         {
 966             o_join = join_straight;
 967         }
 968         if (captype == SP_STROKE_LINECAP_SQUARE)
 969         {
 970             o_butt = butt_square;
 971         }
 972         else if (captype == SP_STROKE_LINECAP_ROUND)
 973         {
 974             o_butt = butt_round;
 975         }
 976         else
 977         {
 978             o_butt = butt_straight;
 979         }
 980
 981         {
 982             double prefOffset = 1.0;
 983             prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", prefOffset);
 984             o_width = prefOffset;
 985         }
 986
 987         if (o_width < 0.01)
 988             o_width = 0.01;
 989         o_miter = i_style->stroke_miterlimit.value * o_width;
 990     }
 991
 992     Path *orig = Path_for_item(item, true, false);
 993     if (orig == NULL)
 994     {
 995         g_free(style);
 996         sp_curve_unref(curve);
 997         return;
 998     }
 999
1000     Path *res = new Path;
1001     res->SetBackData(false);
1002
1003     {
1004         Shape *theShape = new Shape;
1005         Shape *theRes = new Shape;
1006
1007         orig->ConvertWithBackData(1.0);
1008         orig->Fill(theShape, 0);
1009
1010         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1011         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1012         if (val && strcmp(val, "nonzero") == 0)
1013         {
1014             theRes->ConvertToShape(theShape, fill_nonZero);
1015         }
1016         else if (val && strcmp(val, "evenodd") == 0)
1017         {
1018             theRes->ConvertToShape(theShape, fill_oddEven);
1019         }
1020         else
1021         {
1022             theRes->ConvertToShape(theShape, fill_nonZero);
1023         }
1024
1025         Path *originaux[1];
1026         originaux[0] = orig;
1027         theRes->ConvertToForme(res, 1, originaux);
1028
1029         delete theShape;
1030         delete theRes;
1031     }
1032
1033     sp_curve_unref(curve);
1034
1035     if (res->descr_cmd.size() <= 1)
1036     {
1037         // pas vraiment de points sur le resultat
1038         // donc il ne reste rien
1039         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
1040                          /* TODO: annotate */ "splivarot.cpp:1051");
1041         selection->clear();
1042
1043         delete res;
1044         delete orig;
1045         g_free(style);
1046         return;
1047     }
1048
1049     {
1050         gchar tstr[80];
1051
1052         tstr[79] = '\0';
1053
1054         repr = sp_repr_new("svg:path");
1055         repr->setAttribute("sodipodi:type", "inkscape:offset");
1056         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1057                                                           ? o_width
1058                                                           : expand < 0
1059                                                           ? -o_width
1060                                                           : 0 ));
1061
1062         str = res->svg_dump_path();
1063         repr->setAttribute("inkscape:original", str);
1064         g_free(str);
1065
1066         if ( updating ) {
1067             char const *id = SP_OBJECT(item)->repr->attribute("id");
1068             char const *uri = g_strdup_printf("#%s", id);
1069             repr->setAttribute("xlink:href", uri);
1070             g_free((void *) uri);
1071         } else {
1072             repr->setAttribute("inkscape:href", NULL);
1073         }
1074
1075         repr->setAttribute("style", style);
1076
1077         // add the new repr to the parent
1078         parent->appendChild(repr);
1079
1080         // move to the saved position
1081         repr->setPosition(pos > 0 ? pos : 0);
1082
1083         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1084
1085         if ( updating ) {
1086             // on conserve l'original
1087             // we reapply the transform to the original (offset will feel it)
1088             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1089         } else {
1090             // delete original, apply the transform to the offset
1091             SP_OBJECT(item)->deleteObject(false);
1092             sp_item_write_transform(nitem, repr, transform);
1093         }
1094
1095         // The object just created from a temporary repr is only a seed.
1096         // We need to invoke its write which will update its real repr (in particular adding d=)
1097         SP_OBJECT(nitem)->updateRepr();
1098
1099         Inkscape::GC::release(repr);
1100
1101         selection->set(nitem);
1102     }
1103
1104     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
1105                      /* TODO: annotate */ "splivarot.cpp:1116");
1106
1107     delete res;
1108     delete orig;
1109
1110     g_free(style);
1111 }
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124 void
1125 sp_selected_path_do_offset(bool expand, double prefOffset)
1126 {
1127     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1128
1129     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1130
1131     if (selection->isEmpty()) {
1132         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1133         return;
1134     }
1135
1136     bool did = false;
1137
1138     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1139          items != NULL;
1140          items = items->next) {
1141
1142         SPItem *item = (SPItem *) items->data;
1143
1144         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1145             continue;
1146
1147         SPCurve *curve = NULL;
1148         if (SP_IS_SHAPE(item)) {
1149             curve = sp_shape_get_curve(SP_SHAPE(item));
1150             if (curve == NULL)
1151                 continue;
1152         }
1153         if (SP_IS_TEXT(item)) {
1154             curve = SP_TEXT(item)->getNormalizedBpath();
1155             if (curve == NULL)
1156                 continue;
1157         }
1158
1159         NR::Matrix const transform(item->transform);
1160
1161         sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1162
1163         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1164
1165         float o_width, o_miter;
1166         JoinType o_join;
1167         ButtType o_butt;
1168
1169         {
1170             SPStyle *i_style = SP_OBJECT(item)->style;
1171             int jointype, captype;
1172
1173             jointype = i_style->stroke_linejoin.value;
1174             captype = i_style->stroke_linecap.value;
1175             o_width = i_style->stroke_width.computed;
1176
1177             switch (jointype) {
1178                 case SP_STROKE_LINEJOIN_MITER:
1179                     o_join = join_pointy;
1180                     break;
1181                 case SP_STROKE_LINEJOIN_ROUND:
1182                     o_join = join_round;
1183                     break;
1184                 default:
1185                     o_join = join_straight;
1186                     break;
1187             }
1188
1189             switch (captype) {
1190                 case SP_STROKE_LINECAP_SQUARE:
1191                     o_butt = butt_square;
1192                     break;
1193                 case SP_STROKE_LINECAP_ROUND:
1194                     o_butt = butt_round;
1195                     break;
1196                 default:
1197                     o_butt = butt_straight;
1198                     break;
1199             }
1200
1201             o_width = prefOffset;
1202
1203             if (o_width < 0.1)
1204                 o_width = 0.1;
1205             o_miter = i_style->stroke_miterlimit.value * o_width;
1206         }
1207
1208         Path *orig = Path_for_item(item, false);
1209         if (orig == NULL) {
1210             g_free(style);
1211             sp_curve_unref(curve);
1212             continue;
1213         }
1214
1215         Path *res = new Path;
1216         res->SetBackData(false);
1217
1218         {
1219             Shape *theShape = new Shape;
1220             Shape *theRes = new Shape;
1221
1222             orig->ConvertWithBackData(0.03);
1223             orig->Fill(theShape, 0);
1224
1225             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1226             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1227             if (val && strcmp(val, "nonzero") == 0)
1228             {
1229                 theRes->ConvertToShape(theShape, fill_nonZero);
1230             }
1231             else if (val && strcmp(val, "evenodd") == 0)
1232             {
1233                 theRes->ConvertToShape(theShape, fill_oddEven);
1234             }
1235             else
1236             {
1237                 theRes->ConvertToShape(theShape, fill_nonZero);
1238             }
1239
1240             // et maintenant: offset
1241             // methode inexacte
1242 /*                      Path *originaux[1];
1243                         originaux[0] = orig;
1244                         theRes->ConvertToForme(res, 1, originaux);
1245
1246                         if (expand) {
1247                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1248                         } else {
1249                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1250                         }
1251
1252                         orig->ConvertWithBackData(1.0);
1253                         orig->Fill(theShape, 0);
1254                         theRes->ConvertToShape(theShape, fill_positive);
1255                         originaux[0] = orig;
1256                         theRes->ConvertToForme(res, 1, originaux);
1257
1258                         if (o_width >= 0.5) {
1259                         //     res->Coalesce(1.0);
1260                         res->ConvertEvenLines(1.0);
1261                         res->Simplify(1.0);
1262                         } else {
1263                         //      res->Coalesce(o_width);
1264                         res->ConvertEvenLines(1.0*o_width);
1265                         res->Simplify(1.0 * o_width);
1266                         }    */
1267             // methode par makeoffset
1268
1269             if (expand)
1270             {
1271                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1272             }
1273             else
1274             {
1275                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1276             }
1277             theRes->ConvertToShape(theShape, fill_positive);
1278
1279             res->Reset();
1280             theRes->ConvertToForme(res);
1281
1282             if (o_width >= 1.0)
1283             {
1284                 res->ConvertEvenLines(1.0);
1285                 res->Simplify(1.0);
1286             }
1287             else
1288             {
1289                 res->ConvertEvenLines(1.0*o_width);
1290                 res->Simplify(1.0 * o_width);
1291             }
1292
1293             delete theShape;
1294             delete theRes;
1295         }
1296
1297         did = true;
1298
1299         sp_curve_unref(curve);
1300         // remember the position of the item
1301         gint pos = SP_OBJECT_REPR(item)->position();
1302         // remember parent
1303         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1304         // remember id
1305         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1306
1307         selection->remove(item);
1308         SP_OBJECT(item)->deleteObject(false);
1309
1310         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1311
1312             gchar tstr[80];
1313
1314             tstr[79] = '\0';
1315
1316             Inkscape::XML::Node *repr = sp_repr_new("svg:path");
1317
1318             repr->setAttribute("style", style);
1319
1320             gchar *str = res->svg_dump_path();
1321             repr->setAttribute("d", str);
1322             g_free(str);
1323
1324             // add the new repr to the parent
1325             parent->appendChild(repr);
1326
1327             // move to the saved position
1328             repr->setPosition(pos > 0 ? pos : 0);
1329
1330             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1331
1332             // reapply the transform
1333             sp_item_write_transform(newitem, repr, transform);
1334
1335             repr->setAttribute("id", id);
1336
1337             selection->add(repr);
1338
1339             Inkscape::GC::release(repr);
1340         }
1341
1342         delete orig;
1343         delete res;
1344     }
1345
1346     if (did) {
1347         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
1348                          /* TODO: annotate */ "splivarot.cpp:1359");
1349     } else {
1350         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1351         return;
1352     }
1353 }
1354
1355
1356
1357 //return true if we changed something, else false
1358 bool
1359 sp_selected_path_simplify_item(SPDesktop *desktop, Inkscape::Selection *selection, SPItem *item,
1360                  float threshold,  bool justCoalesce,
1361                  float angleLimit, bool breakableAngles,
1362                  gdouble size,     bool modifySelection)
1363 {
1364     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1365         return false;
1366
1367     //If this is a group, do the children instead
1368     if (SP_IS_GROUP(item)) {
1369
1370         bool didSomething = false;
1371
1372         for ( GSList *children = sp_item_group_item_list(SP_GROUP(item));
1373                  children  ; children = children->next) {
1374
1375             SPItem *child = (SPItem *) children->data;
1376             didSomething |= sp_selected_path_simplify_item(desktop, selection, child, threshold, justCoalesce,
1377                    angleLimit, breakableAngles, size, false);
1378         }
1379
1380         return didSomething;
1381     }
1382
1383
1384     SPCurve *curve = NULL;
1385
1386     if (SP_IS_SHAPE(item)) {
1387         curve = sp_shape_get_curve(SP_SHAPE(item));
1388         if (!curve)
1389             return false;
1390     }
1391
1392     if (SP_IS_TEXT(item)) {
1393         curve = SP_TEXT(item)->getNormalizedBpath();
1394         if (!curve)
1395             return false;
1396     }
1397
1398     // save the transform, to re-apply it after simplification
1399     NR::Matrix const transform(item->transform);
1400
1401     /*
1402        reset the transform, effectively transforming the item by transform.inverse();
1403        this is necessary so that the item is transformed twice back and forth,
1404        allowing all compensations to cancel out regardless of the preferences
1405     */
1406     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1407
1408     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1409
1410     Path *orig = Path_for_item(item, false);
1411     if (orig == NULL) {
1412         g_free(style);
1413         sp_curve_unref(curve);
1414         return false;
1415     }
1416
1417     sp_curve_unref(curve);
1418     // remember the position of the item
1419     gint pos = SP_OBJECT_REPR(item)->position();
1420     // remember parent
1421     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1422     // remember id
1423     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1424
1425     //If a group was selected, to not change the selection list
1426     if (modifySelection)
1427         selection->remove(item);
1428
1429     SP_OBJECT(item)->deleteObject(false);
1430
1431     if ( justCoalesce ) {
1432         orig->Coalesce(threshold * size);
1433     } else {
1434         orig->ConvertEvenLines(threshold * size);
1435         orig->Simplify(threshold * size);
1436     }
1437
1438     Inkscape::XML::Node *repr = sp_repr_new("svg:path");
1439
1440     repr->setAttribute("style", style);
1441
1442     gchar *str = orig->svg_dump_path();
1443     repr->setAttribute("d", str);
1444     g_free(str);
1445
1446     // restore id
1447     repr->setAttribute("id", id);
1448
1449     // add the new repr to the parent
1450     parent->appendChild(repr);
1451
1452     // move to the saved position
1453     repr->setPosition(pos > 0 ? pos : 0);
1454
1455     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1456
1457     // reapply the transform
1458     sp_item_write_transform(newitem, repr, transform);
1459
1460     //If we are not in a selected group
1461     if (modifySelection)
1462         selection->add(repr);
1463
1464     Inkscape::GC::release(repr);
1465
1466     // clean up
1467     if (orig) delete orig;
1468
1469     return true;
1470 }
1471
1472
1473 void
1474 sp_selected_path_simplify_selection(float threshold, bool justCoalesce,
1475                        float angleLimit, bool breakableAngles)
1476 {
1477     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1478
1479     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1480
1481     if (selection->isEmpty()) {
1482         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1483                          _("Select <b>path(s)</b> to simplify."));
1484         return;
1485     }
1486
1487     // remember selection size
1488     NR::Rect bbox = selection->bounds();
1489     gdouble size  = L2(bbox.dimensions());
1490
1491     bool didSomething = false;
1492
1493     //Loop through all of the items in the selection
1494     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1495                         items != NULL; items = items->next) {
1496
1497         SPItem *item = (SPItem *) items->data;
1498
1499         if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1500             continue;
1501
1502         didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1503                            threshold, justCoalesce, angleLimit, breakableAngles, size, true);
1504     }
1505
1506
1507     if (didSomething)
1508         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_SIMPLIFY,
1509                          _("Simplify"));
1510     else
1511         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1512
1513 }
1514
1515
1516 // globals for keeping track of accelerated simplify
1517 static double previousTime      = 0.0;
1518 static gdouble simplifyMultiply = 1.0;
1519
1520 void
1521 sp_selected_path_simplify(void)
1522 {
1523     gdouble simplifyThreshold =
1524         prefs_get_double_attribute("options.simplifythreshold", "value", 0.003);
1525     bool simplifyJustCoalesce =
1526         (bool) prefs_get_int_attribute("options.simplifyjustcoalesce", "value", 0);
1527
1528     //Get the current time
1529     GTimeVal currentTimeVal;
1530     g_get_current_time(&currentTimeVal);
1531     double currentTime = currentTimeVal.tv_sec * 1000000 +
1532                 currentTimeVal.tv_usec;
1533
1534     //Was the previous call to this function recent? (<0.5 sec)
1535     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1536
1537         // add to the threshold 1/2 of its original value
1538         simplifyMultiply  += 0.5;
1539         simplifyThreshold *= simplifyMultiply;
1540
1541     } else {
1542         // reset to the default
1543         simplifyMultiply = 1;
1544     }
1545
1546     //remember time for next call
1547     previousTime = currentTime;
1548
1549     //g_print("%g\n", simplify_threshold);
1550
1551     //Make the actual call
1552     sp_selected_path_simplify_selection(simplifyThreshold,
1553                       simplifyJustCoalesce, 0.0, false);
1554 }
1555
1556
1557
1558 // fonctions utilitaires
1559
1560 bool
1561 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1562 {
1563     if (who == NULL || a == NULL)
1564         return false;
1565     if (who == a)
1566         return true;
1567     return Ancetre(sp_repr_parent(a), who);
1568 }
1569
1570 Path *
1571 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1572 {
1573     SPCurve *curve;
1574
1575     if (!item)
1576         return NULL;
1577
1578     if (SP_IS_SHAPE(item))
1579     {
1580         curve = sp_shape_get_curve(SP_SHAPE(item));
1581     }
1582     else if (SP_IS_TEXT(item))
1583     {
1584         curve = SP_TEXT(item)->getNormalizedBpath();
1585     }
1586     else
1587     {
1588         curve = NULL;
1589     }
1590
1591     if (!curve)
1592         return NULL;
1593     NArtBpath *bpath = SP_CURVE_BPATH(curve);
1594     if (bpath == NULL)
1595         return NULL;
1596
1597     if ( doTransformation ) {
1598         if (transformFull)
1599             bpath = nr_artpath_affine(SP_CURVE_BPATH(curve), sp_item_i2doc_affine(item));
1600         else
1601             bpath = nr_artpath_affine(SP_CURVE_BPATH(curve), item->transform);
1602         sp_curve_unref(curve);
1603         curve=NULL;
1604     } else {
1605         bpath=SP_CURVE_BPATH(curve);
1606     }
1607
1608     Path *dest = new Path;
1609     dest->SetBackData(false);
1610     {
1611         int   i;
1612         bool  closed = false;
1613         float lastX  = 0.0;
1614         float lastY  = 0.0;
1615
1616         for (i = 0; bpath[i].code != NR_END; i++) {
1617             switch (bpath[i].code) {
1618                 case NR_LINETO:
1619                     lastX = bpath[i].x3;
1620                     lastY = bpath[i].y3;
1621                     {
1622                         NR::Point tmp(lastX, lastY);
1623                         dest->LineTo(tmp);
1624                     }
1625                     break;
1626
1627                 case NR_CURVETO:
1628                 {
1629                     NR::Point tmp, tms, tme;
1630                     tmp[0]=bpath[i].x3;
1631                     tmp[1]=bpath[i].y3;
1632                     tms[0]=3 * (bpath[i].x1 - lastX);
1633                     tms[1]=3 * (bpath[i].y1 - lastY);
1634                     tme[0]=3 * (bpath[i].x3 - bpath[i].x2);
1635                     tme[1]=3 * (bpath[i].y3 - bpath[i].y2);
1636                     dest->CubicTo(tmp,tms,tme);
1637                 }
1638                 lastX = bpath[i].x3;
1639                 lastY = bpath[i].y3;
1640                 break;
1641
1642                 case NR_MOVETO_OPEN:
1643                 case NR_MOVETO:
1644                     if (closed)
1645                         dest->Close();
1646                     closed = (bpath[i].code == NR_MOVETO);
1647                     lastX = bpath[i].x3;
1648                     lastY = bpath[i].y3;
1649                     {
1650                         NR::Point  tmp(lastX, lastY);
1651                         dest->MoveTo(tmp);
1652                     }
1653                     break;
1654                 default:
1655                     break;
1656             }
1657         }
1658         if (closed)
1659             dest->Close();
1660     }
1661
1662     if ( doTransformation ) {
1663         if ( bpath ) g_free(bpath);
1664     } else {
1665         sp_curve_unref(curve);
1666     }
1667     return dest;
1668 }
1669
1670 NR::Maybe<Path::cut_position> get_nearest_position_on_Path(Path *path, NR::Point p)
1671 {
1672     //get nearest position on path
1673     Path::cut_position pos = path->PointToCurvilignPosition(p);
1674     return pos;
1675 }
1676
1677 NR::Point get_point_on_Path(Path *path, int piece, double t)
1678 {
1679     NR::Point p;
1680     path->PointAt(piece, t, p);
1681     return p;
1682 }
1683
1684
1685 /*
1686   Local Variables:
1687   mode:c++
1688   c-file-style:"stroustrup"
1689   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1690   indent-tabs-mode:nil
1691   fill-column:99
1692   End:
1693 */
1694 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :