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);
  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);
  67 }
  68
  69 void
  70 sp_selected_path_intersect()
  71 {
  72     sp_selected_path_boolop(bool_op_inters);
  73 }
  74
  75 void
  76 sp_selected_path_diff()
  77 {
  78     sp_selected_path_boolop(bool_op_diff);
  79 }
  80
  81 void
  82 sp_selected_path_symdiff()
  83 {
  84     sp_selected_path_boolop(bool_op_symdiff);
  85 }
  86 void
  87 sp_selected_path_cut()
  88 {
  89     sp_selected_path_boolop(bool_op_cut);
  90 }
  91 void
  92 sp_selected_path_slice()
  93 {
  94     sp_selected_path_boolop(bool_op_slice);
  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)
 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));
 409         selection->clear();
 410
 411         delete res;
 412         g_slist_free(il);
 413         return;
 414     }
 415
 416     // remember important aspects of the source path, to be restored
 417     Inkscape::XML::Node *repr_source;
 418     if ( bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 419         if (reverseOrderForOp) {
 420              repr_source = SP_OBJECT_REPR(il->data);
 421         } else {
 422              repr_source = SP_OBJECT_REPR(il->next->data);
 423         }
 424     } else {
 425         // find out the bottom object
 426         GSList *sorted = g_slist_copy((GSList *) selection->reprList());
 427
 428         sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
 429         repr_source = ((Inkscape::XML::Node *) sorted->data);
 430         g_slist_free(sorted);
 431     }
 432     gint pos = repr_source->position();
 433     Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
 434     char const *id = repr_source->attribute("id");
 435     char const *style = repr_source->attribute("style");
 436
 437
 438     // remove source paths
 439     selection->clear();
 440     for (GSList *l = il; l != NULL; l = l->next) {
 441         // if this is the bottommost object,
 442         if (!strcmp(SP_OBJECT_REPR(l->data)->attribute("id"), id)) {
 443             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 444             SP_OBJECT(l->data)->deleteObject(false);
 445         } else {
 446             // delete the object for real, so that its clones can take appropriate action
 447             SP_OBJECT(l->data)->deleteObject();
 448         }
 449     }
 450     g_slist_free(il);
 451
 452     // premultiply by the inverse of parent's repr
 453     SPItem *parent_item = SP_ITEM(sp_desktop_document(desktop)->getObjectByRepr(parent));
 454     NR::Matrix local = sp_item_i2doc_affine(parent_item);
 455     gchar affinestr[80];
 456     gchar *transform = NULL;
 457     if (!local.test_identity() && sp_svg_transform_write(affinestr, 79, local.inverse())) {
 458         transform = affinestr;
 459     }
 460
 461     // now that we have the result, add it on the canvas
 462     if ( bop == bool_op_cut || bop == bool_op_slice ) {
 463         int    nbRP=0;
 464         Path** resPath;
 465         if ( bop == bool_op_slice ) {
 466             // there are moveto's at each intersection, but it's still one unique path
 467             // so break it down and add each subpath independently
 468             // we could call break_apart to do this, but while we have the description...
 469             resPath=res->SubPaths(nbRP, false);
 470         } else {
 471             // cut operation is a bit wicked: you need to keep holes
 472             // that's why you needed the nesting
 473             // ConvertToFormeNested() dumped all the subpath in a single Path "res", so we need
 474             // to get the path for each part of the polygon. that's why you need the nesting info:
 475             // to know in wich subpath to add a subpath
 476             resPath=res->SubPathsWithNesting(nbRP, true, nbNest, nesting, conts);
 477
 478             // cleaning
 479             if ( conts ) free(conts);
 480             if ( nesting ) free(nesting);
 481         }
 482
 483         // add all the pieces resulting from cut or slice
 484         for (int i=0;i<nbRP;i++) {
 485             gchar *d = resPath[i]->svg_dump_path();
 486
 487             Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 488             repr->setAttribute("style", style);
 489             repr->setAttribute("d", d);
 490             g_free(d);
 491
 492             // for slice, remove fill
 493             if (bop == bool_op_slice) {
 494                 SPCSSAttr *css;
 495
 496                 css = sp_repr_css_attr_new();
 497                 sp_repr_css_set_property(css, "fill", "none");
 498
 499                 sp_repr_css_change(repr, css, "style");
 500
 501                 sp_repr_css_attr_unref(css);
 502             }
 503
 504             // we assign the same id on all pieces, but it on adding to document, it will be changed on all except one
 505             // this means it's basically random which of the pieces inherits the original's id and clones
 506             // a better algorithm might figure out e.g. the biggest piece
 507             repr->setAttribute("id", id);
 508
 509             repr->setAttribute("transform", transform);
 510
 511             // add the new repr to the parent
 512             parent->appendChild(repr);
 513
 514             // move to the saved position
 515             repr->setPosition(pos > 0 ? pos : 0);
 516
 517             selection->add(repr);
 518             Inkscape::GC::release(repr);
 519
 520             delete resPath[i];
 521         }
 522         if ( resPath ) free(resPath);
 523
 524     } else {
 525         gchar *d = res->svg_dump_path();
 526
 527         Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 528         repr->setAttribute("style", style);
 529
 530         repr->setAttribute("d", d);
 531         g_free(d);
 532
 533         repr->setAttribute("transform", transform);
 534
 535         repr->setAttribute("id", id);
 536         parent->appendChild(repr);
 537         repr->setPosition(pos > 0 ? pos : 0);
 538
 539         selection->add(repr);
 540         Inkscape::GC::release(repr);
 541     }
 542
 543     sp_document_done(sp_desktop_document(desktop));
 544
 545     delete res;
 546 }
 547
 548
 549 void
 550 sp_selected_path_outline()
 551 {
 552     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 553
 554     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 555
 556     if (selection->isEmpty()) {
 557         // TRANSLATORS: "to outline" means "to convert stroke to path"
 558         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to outline."));
 559         return;
 560     }
 561
 562     bool did = false;
 563
 564     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 565          items != NULL;
 566          items = items->next) {
 567
 568         SPItem *item = (SPItem *) items->data;
 569
 570         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 571             continue;
 572
 573         SPCurve *curve = NULL;
 574         if (SP_IS_SHAPE(item)) {
 575             curve = sp_shape_get_curve(SP_SHAPE(item));
 576             if (curve == NULL)
 577                 continue;
 578         }
 579         if (SP_IS_TEXT(item)) {
 580             curve = SP_TEXT(item)->getNormalizedBpath();
 581             if (curve == NULL)
 582                 continue;
 583         }
 584
 585         {   // pas de stroke pas de chocolat
 586             SPCSSAttr *css = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 587             gchar const *val = sp_repr_css_property(css, "stroke", NULL);
 588
 589             if (val == NULL || strcmp(val, "none") == 0) {
 590                 sp_curve_unref(curve);
 591                 continue;
 592             }
 593         }
 594
 595         // remember old stroke style, to be set on fill
 596         SPCSSAttr *ncss;
 597         {
 598             SPCSSAttr *ocss = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 599             gchar const *val = sp_repr_css_property(ocss, "stroke", NULL);
 600             gchar const *opac = sp_repr_css_property(ocss, "stroke-opacity", NULL);
 601
 602             ncss = sp_repr_css_attr_new();
 603
 604             sp_repr_css_set_property(ncss, "stroke", "none");
 605             sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
 606             sp_repr_css_set_property(ncss, "fill", val);
 607             if ( opac ) {
 608                 sp_repr_css_set_property(ncss, "fill-opacity", opac);
 609             } else {
 610                 sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
 611             }
 612             sp_repr_css_unset_property(ncss, "marker-start");
 613             sp_repr_css_unset_property(ncss, "marker-mid");
 614             sp_repr_css_unset_property(ncss, "marker-end");
 615         }
 616
 617         NR::Matrix const transform(item->transform);
 618         float const scale = transform.expansion();
 619         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
 620         SPStyle *i_style = SP_OBJECT(item)->style;
 621
 622         float o_width, o_miter;
 623         JoinType o_join;
 624         ButtType o_butt;
 625
 626         {
 627             int jointype, captype;
 628
 629             jointype = i_style->stroke_linejoin.computed;
 630             captype = i_style->stroke_linecap.computed;
 631             o_width = i_style->stroke_width.computed;
 632
 633             switch (jointype) {
 634                 case SP_STROKE_LINEJOIN_MITER:
 635                     o_join = join_pointy;
 636                     break;
 637                 case SP_STROKE_LINEJOIN_ROUND:
 638                     o_join = join_round;
 639                     break;
 640                 default:
 641                     o_join = join_straight;
 642                     break;
 643             }
 644
 645             switch (captype) {
 646                 case SP_STROKE_LINECAP_SQUARE:
 647                     o_butt = butt_square;
 648                     break;
 649                 case SP_STROKE_LINECAP_ROUND:
 650                     o_butt = butt_round;
 651                     break;
 652                 default:
 653                     o_butt = butt_straight;
 654                     break;
 655             }
 656
 657             if (o_width < 0.1)
 658                 o_width = 0.1;
 659             o_miter = i_style->stroke_miterlimit.value * o_width;
 660         }
 661
 662         Path *orig = Path_for_item(item, false);
 663         if (orig == NULL) {
 664             g_free(style);
 665             sp_curve_unref(curve);
 666             continue;
 667         }
 668
 669         Path *res = new Path;
 670         res->SetBackData(false);
 671
 672         if (i_style->stroke_dash.n_dash) {
 673             // For dashed strokes, use Stroke method, because Outline can't do dashes
 674             // However Stroke adds lots of extra nodes _or_ makes the path crooked, so consider this a temporary workaround
 675
 676             orig->ConvertWithBackData(0.1);
 677
 678             orig->DashPolylineFromStyle(i_style, scale, 0);
 679
 680             Shape* theShape = new Shape;
 681             orig->Stroke(theShape, false, 0.5*o_width, o_join, o_butt,
 682                          0.5 * o_miter);
 683             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 684
 685             Shape *theRes = new Shape;
 686
 687             theRes->ConvertToShape(theShape, fill_positive);
 688
 689             Path *originaux[1];
 690             originaux[0] = res;
 691             theRes->ConvertToForme(orig, 1, originaux);
 692
 693             res->Coalesce(5.0);
 694
 695             delete theShape;
 696             delete theRes;
 697
 698         } else {
 699
 700             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 701
 702             orig->Coalesce(0.5 * o_width);
 703
 704             Shape *theShape = new Shape;
 705             Shape *theRes = new Shape;
 706
 707             res->ConvertWithBackData(1.0);
 708             res->Fill(theShape, 0);
 709             theRes->ConvertToShape(theShape, fill_positive);
 710
 711             Path *originaux[1];
 712             originaux[0] = res;
 713             theRes->ConvertToForme(orig, 1, originaux);
 714
 715             delete theShape;
 716             delete theRes;
 717         }
 718
 719         if (orig->descr_cmd.size() <= 1) {
 720             // ca a merd\8e, ou bien le resultat est vide
 721             delete res;
 722             delete orig;
 723             g_free(style);
 724             continue;
 725         }
 726
 727         did = true;
 728
 729         // remember the position of the item
 730         gint pos = SP_OBJECT_REPR(item)->position();
 731         // remember parent
 732         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 733         // remember id
 734         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 735
 736         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
 737
 738             Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 739
 740             // restore old style
 741             repr->setAttribute("style", style);
 742
 743             // set old stroke style on fill
 744             sp_repr_css_change(repr, ncss, "style");
 745
 746             sp_repr_css_attr_unref(ncss);
 747
 748             gchar *str = orig->svg_dump_path();
 749             repr->setAttribute("d", str);
 750             g_free(str);
 751
 752
 753             if (SP_IS_SHAPE(item) && sp_shape_has_markers (SP_SHAPE(item))) {
 754
 755                 Inkscape::XML::Node *g_repr = sp_repr_new("svg:g");
 756
 757                 // add the group to the parent
 758                 parent->appendChild(g_repr);
 759                 // move to the saved position
 760                 g_repr->setPosition(pos > 0 ? pos : 0);
 761
 762                 g_repr->appendChild(repr);
 763                 repr->setAttribute("id", id);
 764                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 765                 sp_item_write_transform(newitem, repr, transform);
 766
 767                 SPShape *shape = SP_SHAPE(item);
 768
 769                 for (NArtBpath* bp = SP_CURVE_BPATH(shape->curve); bp->code != NR_END; bp++) {
 770                     for (int m = SP_MARKER_LOC_START; m < SP_MARKER_LOC_QTY; m++) {
 771                         if (sp_shape_marker_required (shape, m, bp)) {
 772
 773                             SPMarker* marker = SP_MARKER (shape->marker[m]);
 774                             SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (shape->marker[m]));
 775
 776                             NR::Matrix tr(sp_shape_marker_get_transform(shape, bp));
 777
 778                             if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
 779                                 tr = NR::scale(i_style->stroke_width.computed) * tr;
 780                             }
 781
 782                             // total marker transform
 783                             tr = marker_item->transform * marker->c2p * tr * transform;
 784
 785                             if (SP_OBJECT_REPR(marker_item)) {
 786                                 Inkscape::XML::Node *m_repr = SP_OBJECT_REPR(marker_item)->duplicate();
 787                                 g_repr->appendChild(m_repr);
 788                                 SPItem *marker_item = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(m_repr);
 789                                 sp_item_write_transform(marker_item, m_repr, tr);
 790                             }
 791                         }
 792                     }
 793                 }
 794
 795
 796                 selection->add(g_repr);
 797
 798                 Inkscape::GC::release(g_repr);
 799
 800
 801             } else {
 802
 803                 // add the new repr to the parent
 804                 parent->appendChild(repr);
 805
 806                 // move to the saved position
 807                 repr->setPosition(pos > 0 ? pos : 0);
 808
 809                 repr->setAttribute("id", id);
 810
 811                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 812                 sp_item_write_transform(newitem, repr, transform);
 813
 814                 selection->add(repr);
 815
 816             }
 817
 818             Inkscape::GC::release(repr);
 819
 820             sp_curve_unref(curve);
 821             selection->remove(item);
 822             SP_OBJECT(item)->deleteObject(false);
 823
 824         }
 825
 826         delete res;
 827         delete orig;
 828         g_free(style);
 829
 830     }
 831
 832     if (did) {
 833         sp_document_done(sp_desktop_document(desktop));
 834     } else {
 835         // TRANSLATORS: "to outline" means "to convert stroke to path"
 836         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> to outline in the selection."));
 837         return;
 838     }
 839 }
 840
 841
 842 void
 843 sp_selected_path_offset()
 844 {
 845     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 846
 847     sp_selected_path_do_offset(true, prefOffset);
 848 }
 849 void
 850 sp_selected_path_inset()
 851 {
 852     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 853
 854     sp_selected_path_do_offset(false, prefOffset);
 855 }
 856
 857 void
 858 sp_selected_path_offset_screen(double pixels)
 859 {
 860     sp_selected_path_do_offset(true,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 861 }
 862
 863 void
 864 sp_selected_path_inset_screen(double pixels)
 865 {
 866     sp_selected_path_do_offset(false,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 867 }
 868
 869
 870 void sp_selected_path_create_offset_object_zero()
 871 {
 872     sp_selected_path_create_offset_object(0, false);
 873 }
 874
 875 void sp_selected_path_create_offset()
 876 {
 877     sp_selected_path_create_offset_object(1, false);
 878 }
 879 void sp_selected_path_create_inset()
 880 {
 881     sp_selected_path_create_offset_object(-1, false);
 882 }
 883
 884 void sp_selected_path_create_updating_offset_object_zero()
 885 {
 886     sp_selected_path_create_offset_object(0, true);
 887 }
 888
 889 void sp_selected_path_create_updating_offset()
 890 {
 891     sp_selected_path_create_offset_object(1, true);
 892 }
 893 void sp_selected_path_create_updating_inset()
 894 {
 895     sp_selected_path_create_offset_object(-1, true);
 896 }
 897
 898 void
 899 sp_selected_path_create_offset_object(int expand, bool updating)
 900 {
 901     Inkscape::Selection *selection;
 902     Inkscape::XML::Node *repr;
 903     SPItem *item;
 904     SPCurve *curve;
 905     gchar *style, *str;
 906     SPDesktop *desktop;
 907     float o_width, o_miter;
 908     JoinType o_join;
 909     ButtType o_butt;
 910
 911     curve = NULL;
 912
 913     desktop = SP_ACTIVE_DESKTOP;
 914
 915     selection = sp_desktop_selection(desktop);
 916
 917     item = selection->singleItem();
 918
 919     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
 920         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
 921         return;
 922     }
 923     if (SP_IS_SHAPE(item))
 924     {
 925         curve = sp_shape_get_curve(SP_SHAPE(item));
 926         if (curve == NULL)
 927             return;
 928     }
 929     if (SP_IS_TEXT(item))
 930     {
 931         curve = SP_TEXT(item)->getNormalizedBpath();
 932         if (curve == NULL)
 933             return;
 934     }
 935
 936     NR::Matrix const transform(item->transform);
 937
 938     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
 939
 940     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
 941
 942     // remember the position of the item
 943     gint pos = SP_OBJECT_REPR(item)->position();
 944     // remember parent
 945     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 946
 947     {
 948         SPStyle *i_style = SP_OBJECT(item)->style;
 949         int jointype, captype;
 950
 951         jointype = i_style->stroke_linejoin.value;
 952         captype = i_style->stroke_linecap.value;
 953         o_width = i_style->stroke_width.computed;
 954         if (jointype == SP_STROKE_LINEJOIN_MITER)
 955         {
 956             o_join = join_pointy;
 957         }
 958         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
 959         {
 960             o_join = join_round;
 961         }
 962         else
 963         {
 964             o_join = join_straight;
 965         }
 966         if (captype == SP_STROKE_LINECAP_SQUARE)
 967         {
 968             o_butt = butt_square;
 969         }
 970         else if (captype == SP_STROKE_LINECAP_ROUND)
 971         {
 972             o_butt = butt_round;
 973         }
 974         else
 975         {
 976             o_butt = butt_straight;
 977         }
 978
 979         {
 980             double prefOffset = 1.0;
 981             prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", prefOffset);
 982             o_width = prefOffset;
 983         }
 984
 985         if (o_width < 0.01)
 986             o_width = 0.01;
 987         o_miter = i_style->stroke_miterlimit.value * o_width;
 988     }
 989
 990     Path *orig = Path_for_item(item, true, false);
 991     if (orig == NULL)
 992     {
 993         g_free(style);
 994         sp_curve_unref(curve);
 995         return;
 996     }
 997
 998     Path *res = new Path;
 999     res->SetBackData(false);
1000
1001     {
1002         Shape *theShape = new Shape;
1003         Shape *theRes = new Shape;
1004
1005         orig->ConvertWithBackData(1.0);
1006         orig->Fill(theShape, 0);
1007
1008         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1009         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1010         if (val && strcmp(val, "nonzero") == 0)
1011         {
1012             theRes->ConvertToShape(theShape, fill_nonZero);
1013         }
1014         else if (val && strcmp(val, "evenodd") == 0)
1015         {
1016             theRes->ConvertToShape(theShape, fill_oddEven);
1017         }
1018         else
1019         {
1020             theRes->ConvertToShape(theShape, fill_nonZero);
1021         }
1022
1023         Path *originaux[1];
1024         originaux[0] = orig;
1025         theRes->ConvertToForme(res, 1, originaux);
1026
1027         delete theShape;
1028         delete theRes;
1029     }
1030
1031     sp_curve_unref(curve);
1032
1033     if (res->descr_cmd.size() <= 1)
1034     {
1035         // pas vraiment de points sur le resultat
1036         // donc il ne reste rien
1037         sp_document_done(sp_desktop_document(desktop));
1038         selection->clear();
1039
1040         delete res;
1041         delete orig;
1042         g_free(style);
1043         return;
1044     }
1045
1046     {
1047         gchar tstr[80];
1048
1049         tstr[79] = '\0';
1050
1051         repr = sp_repr_new("svg:path");
1052         repr->setAttribute("sodipodi:type", "inkscape:offset");
1053         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1054                                                           ? o_width
1055                                                           : expand < 0
1056                                                           ? -o_width
1057                                                           : 0 ));
1058
1059         str = res->svg_dump_path();
1060         repr->setAttribute("inkscape:original", str);
1061         g_free(str);
1062
1063         if ( updating ) {
1064             char const *id = SP_OBJECT(item)->repr->attribute("id");
1065             char const *uri = g_strdup_printf("#%s", id);
1066             repr->setAttribute("xlink:href", uri);
1067             g_free((void *) uri);
1068         } else {
1069             repr->setAttribute("inkscape:href", NULL);
1070         }
1071
1072         repr->setAttribute("style", style);
1073
1074         // add the new repr to the parent
1075         parent->appendChild(repr);
1076
1077         // move to the saved position
1078         repr->setPosition(pos > 0 ? pos : 0);
1079
1080         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1081
1082         if ( updating ) {
1083             // on conserve l'original
1084             // we reapply the transform to the original (offset will feel it)
1085             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1086         } else {
1087             // delete original, apply the transform to the offset
1088             SP_OBJECT(item)->deleteObject(false);
1089             sp_item_write_transform(nitem, repr, transform);
1090         }
1091
1092         // The object just created from a temporary repr is only a seed.
1093         // We need to invoke its write which will update its real repr (in particular adding d=)
1094         SP_OBJECT(nitem)->updateRepr();
1095
1096         Inkscape::GC::release(repr);
1097
1098         selection->set(nitem);
1099     }
1100
1101     sp_document_done(sp_desktop_document(desktop));
1102
1103     delete res;
1104     delete orig;
1105
1106     g_free(style);
1107 }
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120 void
1121 sp_selected_path_do_offset(bool expand, double prefOffset)
1122 {
1123     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1124
1125     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1126
1127     if (selection->isEmpty()) {
1128         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1129         return;
1130     }
1131
1132     bool did = false;
1133
1134     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1135          items != NULL;
1136          items = items->next) {
1137
1138         SPItem *item = (SPItem *) items->data;
1139
1140         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1141             continue;
1142
1143         SPCurve *curve = NULL;
1144         if (SP_IS_SHAPE(item)) {
1145             curve = sp_shape_get_curve(SP_SHAPE(item));
1146             if (curve == NULL)
1147                 continue;
1148         }
1149         if (SP_IS_TEXT(item)) {
1150             curve = SP_TEXT(item)->getNormalizedBpath();
1151             if (curve == NULL)
1152                 continue;
1153         }
1154
1155         NR::Matrix const transform(item->transform);
1156
1157         sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1158
1159         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1160
1161         float o_width, o_miter;
1162         JoinType o_join;
1163         ButtType o_butt;
1164
1165         {
1166             SPStyle *i_style = SP_OBJECT(item)->style;
1167             int jointype, captype;
1168
1169             jointype = i_style->stroke_linejoin.value;
1170             captype = i_style->stroke_linecap.value;
1171             o_width = i_style->stroke_width.computed;
1172
1173             switch (jointype) {
1174                 case SP_STROKE_LINEJOIN_MITER:
1175                     o_join = join_pointy;
1176                     break;
1177                 case SP_STROKE_LINEJOIN_ROUND:
1178                     o_join = join_round;
1179                     break;
1180                 default:
1181                     o_join = join_straight;
1182                     break;
1183             }
1184
1185             switch (captype) {
1186                 case SP_STROKE_LINECAP_SQUARE:
1187                     o_butt = butt_square;
1188                     break;
1189                 case SP_STROKE_LINECAP_ROUND:
1190                     o_butt = butt_round;
1191                     break;
1192                 default:
1193                     o_butt = butt_straight;
1194                     break;
1195             }
1196
1197             o_width = prefOffset;
1198
1199             if (o_width < 0.1)
1200                 o_width = 0.1;
1201             o_miter = i_style->stroke_miterlimit.value * o_width;
1202         }
1203
1204         Path *orig = Path_for_item(item, false);
1205         if (orig == NULL) {
1206             g_free(style);
1207             sp_curve_unref(curve);
1208             continue;
1209         }
1210
1211         Path *res = new Path;
1212         res->SetBackData(false);
1213
1214         {
1215             Shape *theShape = new Shape;
1216             Shape *theRes = new Shape;
1217
1218             orig->ConvertWithBackData(0.03);
1219             orig->Fill(theShape, 0);
1220
1221             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1222             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1223             if (val && strcmp(val, "nonzero") == 0)
1224             {
1225                 theRes->ConvertToShape(theShape, fill_nonZero);
1226             }
1227             else if (val && strcmp(val, "evenodd") == 0)
1228             {
1229                 theRes->ConvertToShape(theShape, fill_oddEven);
1230             }
1231             else
1232             {
1233                 theRes->ConvertToShape(theShape, fill_nonZero);
1234             }
1235
1236             // et maintenant: offset
1237             // methode inexacte
1238 /*                      Path *originaux[1];
1239                         originaux[0] = orig;
1240                         theRes->ConvertToForme(res, 1, originaux);
1241
1242                         if (expand) {
1243                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1244                         } else {
1245                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1246                         }
1247
1248                         orig->ConvertWithBackData(1.0);
1249                         orig->Fill(theShape, 0);
1250                         theRes->ConvertToShape(theShape, fill_positive);
1251                         originaux[0] = orig;
1252                         theRes->ConvertToForme(res, 1, originaux);
1253
1254                         if (o_width >= 0.5) {
1255                         //     res->Coalesce(1.0);
1256                         res->ConvertEvenLines(1.0);
1257                         res->Simplify(1.0);
1258                         } else {
1259                         //      res->Coalesce(o_width);
1260                         res->ConvertEvenLines(1.0*o_width);
1261                         res->Simplify(1.0 * o_width);
1262                         }    */
1263             // methode par makeoffset
1264
1265             if (expand)
1266             {
1267                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1268             }
1269             else
1270             {
1271                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1272             }
1273             theRes->ConvertToShape(theShape, fill_positive);
1274
1275             res->Reset();
1276             theRes->ConvertToForme(res);
1277
1278             if (o_width >= 1.0)
1279             {
1280                 res->ConvertEvenLines(1.0);
1281                 res->Simplify(1.0);
1282             }
1283             else
1284             {
1285                 res->ConvertEvenLines(1.0*o_width);
1286                 res->Simplify(1.0 * o_width);
1287             }
1288
1289             delete theShape;
1290             delete theRes;
1291         }
1292
1293         did = true;
1294
1295         sp_curve_unref(curve);
1296         // remember the position of the item
1297         gint pos = SP_OBJECT_REPR(item)->position();
1298         // remember parent
1299         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1300         // remember id
1301         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1302
1303         selection->remove(item);
1304         SP_OBJECT(item)->deleteObject(false);
1305
1306         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1307
1308             gchar tstr[80];
1309
1310             tstr[79] = '\0';
1311
1312             Inkscape::XML::Node *repr = sp_repr_new("svg:path");
1313
1314             repr->setAttribute("style", style);
1315
1316             gchar *str = res->svg_dump_path();
1317             repr->setAttribute("d", str);
1318             g_free(str);
1319
1320             // add the new repr to the parent
1321             parent->appendChild(repr);
1322
1323             // move to the saved position
1324             repr->setPosition(pos > 0 ? pos : 0);
1325
1326             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1327
1328             // reapply the transform
1329             sp_item_write_transform(newitem, repr, transform);
1330
1331             repr->setAttribute("id", id);
1332
1333             selection->add(repr);
1334
1335             Inkscape::GC::release(repr);
1336         }
1337
1338         delete orig;
1339         delete res;
1340     }
1341
1342     if (did) {
1343         sp_document_done(sp_desktop_document(desktop));
1344     } else {
1345         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1346         return;
1347     }
1348 }
1349
1350
1351
1352 //return true if we changed something, else false
1353 bool
1354 sp_selected_path_simplify_item(SPDesktop *desktop, Inkscape::Selection *selection, SPItem *item,
1355                  float threshold,  bool justCoalesce,
1356                  float angleLimit, bool breakableAngles,
1357                  gdouble size,     bool modifySelection)
1358 {
1359     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1360         return false;
1361
1362     //If this is a group, do the children instead
1363     if (SP_IS_GROUP(item)) {
1364
1365         bool didSomething = false;
1366
1367         for ( GSList *children = sp_item_group_item_list(SP_GROUP(item));
1368                  children  ; children = children->next) {
1369
1370             SPItem *child = (SPItem *) children->data;
1371             didSomething |= sp_selected_path_simplify_item(desktop, selection, child, threshold, justCoalesce,
1372                    angleLimit, breakableAngles, size, false);
1373         }
1374
1375         return didSomething;
1376     }
1377
1378
1379     SPCurve *curve = NULL;
1380
1381     if (SP_IS_SHAPE(item)) {
1382         curve = sp_shape_get_curve(SP_SHAPE(item));
1383         if (!curve)
1384             return false;
1385     }
1386
1387     if (SP_IS_TEXT(item)) {
1388         curve = SP_TEXT(item)->getNormalizedBpath();
1389         if (!curve)
1390             return false;
1391     }
1392
1393     // save the transform, to re-apply it after simplification
1394     NR::Matrix const transform(item->transform);
1395
1396     /*
1397        reset the transform, effectively transforming the item by transform.inverse();
1398        this is necessary so that the item is transformed twice back and forth,
1399        allowing all compensations to cancel out regardless of the preferences
1400     */
1401     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1402
1403     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1404
1405     Path *orig = Path_for_item(item, false);
1406     if (orig == NULL) {
1407         g_free(style);
1408         sp_curve_unref(curve);
1409         return false;
1410     }
1411
1412     sp_curve_unref(curve);
1413     // remember the position of the item
1414     gint pos = SP_OBJECT_REPR(item)->position();
1415     // remember parent
1416     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1417     // remember id
1418     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1419
1420     //If a group was selected, to not change the selection list
1421     if (modifySelection)
1422         selection->remove(item);
1423
1424     SP_OBJECT(item)->deleteObject(false);
1425
1426     if ( justCoalesce ) {
1427         orig->Coalesce(threshold * size);
1428     } else {
1429         orig->ConvertEvenLines(threshold * size);
1430         orig->Simplify(threshold * size);
1431     }
1432
1433     Inkscape::XML::Node *repr = sp_repr_new("svg:path");
1434
1435     repr->setAttribute("style", style);
1436
1437     gchar *str = orig->svg_dump_path();
1438     repr->setAttribute("d", str);
1439     g_free(str);
1440
1441     // restore id
1442     repr->setAttribute("id", id);
1443
1444     // add the new repr to the parent
1445     parent->appendChild(repr);
1446
1447     // move to the saved position
1448     repr->setPosition(pos > 0 ? pos : 0);
1449
1450     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1451
1452     // reapply the transform
1453     sp_item_write_transform(newitem, repr, transform);
1454
1455     //If we are not in a selected group
1456     if (modifySelection)
1457         selection->add(repr);
1458
1459     Inkscape::GC::release(repr);
1460
1461     // clean up
1462     if (orig) delete orig;
1463
1464     return true;
1465 }
1466
1467
1468 void
1469 sp_selected_path_simplify_selection(float threshold, bool justCoalesce,
1470                        float angleLimit, bool breakableAngles)
1471 {
1472     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1473
1474     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1475
1476     if (selection->isEmpty()) {
1477         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1478                          _("Select <b>path(s)</b> to simplify."));
1479         return;
1480     }
1481
1482     // remember selection size
1483     NR::Rect bbox = selection->bounds();
1484     gdouble size  = L2(bbox.dimensions());
1485
1486     bool didSomething = false;
1487
1488     //Loop through all of the items in the selection
1489     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1490                         items != NULL; items = items->next) {
1491
1492         SPItem *item = (SPItem *) items->data;
1493
1494         if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1495             continue;
1496
1497         didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1498                            threshold, justCoalesce, angleLimit, breakableAngles, size, true);
1499     }
1500
1501
1502     if (didSomething)
1503         sp_document_done(sp_desktop_document(desktop));
1504     else
1505         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1506
1507 }
1508
1509
1510 // globals for keeping track of accelerated simplify
1511 static double previousTime      = 0.0;
1512 static gdouble simplifyMultiply = 1.0;
1513
1514 void
1515 sp_selected_path_simplify(void)
1516 {
1517     gdouble simplifyThreshold =
1518         prefs_get_double_attribute("options.simplifythreshold", "value", 0.003);
1519     bool simplifyJustCoalesce =
1520         (bool) prefs_get_int_attribute("options.simplifyjustcoalesce", "value", 0);
1521
1522     //Get the current time
1523     GTimeVal currentTimeVal;
1524     g_get_current_time(&currentTimeVal);
1525     double currentTime = currentTimeVal.tv_sec * 1000000 +
1526                 currentTimeVal.tv_usec;
1527
1528     //Was the previous call to this function recent? (<0.5 sec)
1529     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1530
1531         // add to the threshold 1/2 of its original value
1532         simplifyMultiply  += 0.5;
1533         simplifyThreshold *= simplifyMultiply;
1534
1535     } else {
1536         // reset to the default
1537         simplifyMultiply = 1;
1538     }
1539
1540     //remember time for next call
1541     previousTime = currentTime;
1542
1543     //g_print("%g\n", simplify_threshold);
1544
1545     //Make the actual call
1546     sp_selected_path_simplify_selection(simplifyThreshold,
1547                       simplifyJustCoalesce, 0.0, false);
1548 }
1549
1550
1551
1552 // fonctions utilitaires
1553
1554 bool
1555 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1556 {
1557     if (who == NULL || a == NULL)
1558         return false;
1559     if (who == a)
1560         return true;
1561     return Ancetre(sp_repr_parent(a), who);
1562 }
1563
1564 Path *
1565 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1566 {
1567     SPCurve *curve;
1568
1569     if (!item)
1570         return NULL;
1571
1572     if (SP_IS_SHAPE(item))
1573     {
1574         curve = sp_shape_get_curve(SP_SHAPE(item));
1575     }
1576     else if (SP_IS_TEXT(item))
1577     {
1578         curve = SP_TEXT(item)->getNormalizedBpath();
1579     }
1580     else
1581     {
1582         curve = NULL;
1583     }
1584
1585     if (!curve)
1586         return NULL;
1587     NArtBpath *bpath = SP_CURVE_BPATH(curve);
1588     if (bpath == NULL)
1589         return NULL;
1590
1591     if ( doTransformation ) {
1592         if (transformFull)
1593             bpath = nr_artpath_affine(SP_CURVE_BPATH(curve), sp_item_i2doc_affine(item));
1594         else
1595             bpath = nr_artpath_affine(SP_CURVE_BPATH(curve), item->transform);
1596         sp_curve_unref(curve);
1597         curve=NULL;
1598     } else {
1599         bpath=SP_CURVE_BPATH(curve);
1600     }
1601
1602     Path *dest = new Path;
1603     dest->SetBackData(false);
1604     {
1605         int   i;
1606         bool  closed = false;
1607         float lastX  = 0.0;
1608         float lastY  = 0.0;
1609
1610         for (i = 0; bpath[i].code != NR_END; i++) {
1611             switch (bpath[i].code) {
1612                 case NR_LINETO:
1613                     lastX = bpath[i].x3;
1614                     lastY = bpath[i].y3;
1615                     {
1616                         NR::Point tmp(lastX, lastY);
1617                         dest->LineTo(tmp);
1618                     }
1619                     break;
1620
1621                 case NR_CURVETO:
1622                 {
1623                     NR::Point tmp, tms, tme;
1624                     tmp[0]=bpath[i].x3;
1625                     tmp[1]=bpath[i].y3;
1626                     tms[0]=3 * (bpath[i].x1 - lastX);
1627                     tms[1]=3 * (bpath[i].y1 - lastY);
1628                     tme[0]=3 * (bpath[i].x3 - bpath[i].x2);
1629                     tme[1]=3 * (bpath[i].y3 - bpath[i].y2);
1630                     dest->CubicTo(tmp,tms,tme);
1631                 }
1632                 lastX = bpath[i].x3;
1633                 lastY = bpath[i].y3;
1634                 break;
1635
1636                 case NR_MOVETO_OPEN:
1637                 case NR_MOVETO:
1638                     if (closed)
1639                         dest->Close();
1640                     closed = (bpath[i].code == NR_MOVETO);
1641                     lastX = bpath[i].x3;
1642                     lastY = bpath[i].y3;
1643                     {
1644                         NR::Point  tmp(lastX, lastY);
1645                         dest->MoveTo(tmp);
1646                     }
1647                     break;
1648                 default:
1649                     break;
1650             }
1651         }
1652         if (closed)
1653             dest->Close();
1654     }
1655
1656     if ( doTransformation ) {
1657         if ( bpath ) g_free(bpath);
1658     } else {
1659         sp_curve_unref(curve);
1660     }
1661     return dest;
1662 }
1663
1664 NR::Maybe<Path::cut_position> get_nearest_position_on_Path(Path *path, NR::Point p)
1665 {
1666     //get nearest position on path
1667     Path::cut_position pos = path->PointToCurvilignPosition(p);
1668     return pos;
1669 }
1670
1671 NR::Point get_point_on_Path(Path *path, int piece, double t)
1672 {
1673     NR::Point p;
1674     path->PointAt(piece, t, p);
1675     return p;
1676 }
1677
1678
1679 /*
1680   Local Variables:
1681   mode:c++
1682   c-file-style:"stroustrup"
1683   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1684   indent-tabs-mode:nil
1685   fill-column:99
1686   End:
1687 */
1688 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :