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 <cstring>
  21 #include <string>
  22 #include <vector>
  23 #include <glib/gmem.h>
  24 #include "xml/repr.h"
  25 #include "svg/svg.h"
  26 #include "sp-path.h"
  27 #include "sp-shape.h"
  28 #include "sp-image.h"
  29 #include "marker.h"
  30 #include "enums.h"
  31 #include "sp-text.h"
  32 #include "sp-flowtext.h"
  33 #include "text-editing.h"
  34 #include "sp-item-group.h"
  35 #include "style.h"
  36 #include "inkscape.h"
  37 #include "document.h"
  38 #include "message-stack.h"
  39 #include "selection.h"
  40 #include "desktop-handles.h"
  41 #include "desktop.h"
  42 #include "display/canvas-bpath.h"
  43 #include "display/curve.h"
  44 #include <glibmm/i18n.h>
  45 #include "prefs-utils.h"
  46
  47 #include "libnr/n-art-bpath.h"
  48 #include "libnr/nr-path.h"
  49 #include "xml/repr.h"
  50 #include "xml/repr-sorting.h"
  51 #include <2geom/pathvector.h>
  52 #include <libnr/nr-matrix-fns.h>
  53 #include <libnr/nr-matrix-ops.h>
  54 #include <libnr/nr-matrix-translate-ops.h>
  55 #include <libnr/nr-scale-matrix-ops.h>
  56
  57 #include "livarot/Path.h"
  58 #include "livarot/Shape.h"
  59
  60 #include "splivarot.h"
  61
  62 bool   Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who);
  63
  64 void sp_selected_path_boolop(bool_op bop, const unsigned int verb=SP_VERB_NONE, const Glib::ustring description="");
  65 void sp_selected_path_do_offset(bool expand, double prefOffset);
  66 void sp_selected_path_create_offset_object(int expand, bool updating);
  67
  68 void
  69 sp_selected_path_union()
  70 {
  71     sp_selected_path_boolop(bool_op_union, SP_VERB_SELECTION_UNION, _("Union"));
  72 }
  73
  74 void
  75 sp_selected_path_union_skip_undo()
  76 {
  77     sp_selected_path_boolop(bool_op_union, SP_VERB_NONE, _("Union"));
  78 }
  79
  80 void
  81 sp_selected_path_intersect()
  82 {
  83     sp_selected_path_boolop(bool_op_inters, SP_VERB_SELECTION_INTERSECT, _("Intersection"));
  84 }
  85
  86 void
  87 sp_selected_path_diff()
  88 {
  89     sp_selected_path_boolop(bool_op_diff, SP_VERB_SELECTION_DIFF, _("Difference"));
  90 }
  91
  92 void
  93 sp_selected_path_diff_skip_undo()
  94 {
  95     sp_selected_path_boolop(bool_op_diff, SP_VERB_NONE, _("Difference"));
  96 }
  97
  98 void
  99 sp_selected_path_symdiff()
 100 {
 101     sp_selected_path_boolop(bool_op_symdiff, SP_VERB_SELECTION_SYMDIFF, _("Exclusion"));
 102 }
 103 void
 104 sp_selected_path_cut()
 105 {
 106     sp_selected_path_boolop(bool_op_cut, SP_VERB_SELECTION_CUT, _("Division"));
 107 }
 108 void
 109 sp_selected_path_slice()
 110 {
 111     sp_selected_path_boolop(bool_op_slice, SP_VERB_SELECTION_SLICE,  _("Cut path"));
 112 }
 113
 114
 115 // boolean operations
 116 // take the source paths from the file, do the operation, delete the originals and add the results
 117 void
 118 sp_selected_path_boolop(bool_op bop, const unsigned int verb, const Glib::ustring description)
 119 {
 120     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 121
 122     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 123
 124     GSList *il = (GSList *) selection->itemList();
 125
 126     // allow union on a single object for the purpose of removing self overlapse (svn log, revision 13334)
 127     if ( (g_slist_length(il) < 2) && (bop != bool_op_union)) {
 128         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 2 paths</b> to perform a boolean operation."));
 129         return;
 130     }
 131     else if ( g_slist_length(il) < 1 ) {
 132         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 1 path</b> to perform a boolean union."));
 133         return;
 134     }
 135
 136     if (g_slist_length(il) > 2) {
 137         if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 138             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>exactly 2 paths</b> to perform difference, XOR, division, or path cut."));
 139             return;
 140         }
 141     }
 142
 143     // reverseOrderForOp marks whether the order of the list is the top->down order
 144     // it's only used when there are 2 objects, and for operations who need to know the
 145     // topmost object (differences, cuts)
 146     bool reverseOrderForOp = false;
 147
 148     // mettre les elements de la liste dans l'ordre pour ces operations
 149     if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice) {
 150         // check in the tree to find which element of the selection list is topmost (for 2-operand commands only)
 151         Inkscape::XML::Node *a = SP_OBJECT_REPR(il->data);
 152         Inkscape::XML::Node *b = SP_OBJECT_REPR(il->next->data);
 153
 154         if (a == NULL || b == NULL) {
 155             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."));
 156             return;
 157         }
 158
 159         if (Ancetre(a, b)) {
 160             // a is the parent of b, already in the proper order
 161         } else if (Ancetre(b, a)) {
 162             // reverse order
 163             reverseOrderForOp = true;
 164         } else {
 165
 166             // objects are not in parent/child relationship;
 167             // find their lowest common ancestor
 168             Inkscape::XML::Node *dad = LCA(a, b);
 169             if (dad == NULL) {
 170                 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."));
 171                 return;
 172             }
 173
 174             // find the children of the LCA that lead from it to the a and b
 175             Inkscape::XML::Node *as = AncetreFils(a, dad);
 176             Inkscape::XML::Node *bs = AncetreFils(b, dad);
 177
 178             // find out which comes first
 179             for (Inkscape::XML::Node *child = dad->firstChild(); child; child = child->next()) {
 180                 if (child == as) {
 181                     /* a first, so reverse. */
 182                     reverseOrderForOp = true;
 183                     break;
 184                 }
 185                 if (child == bs)
 186                     break;
 187             }
 188         }
 189     }
 190
 191     il = g_slist_copy(il);
 192
 193     // first check if all the input objects have shapes
 194     // otherwise bail out
 195     for (GSList *l = il; l != NULL; l = l->next)
 196     {
 197         SPItem *item = SP_ITEM(l->data);
 198         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item) && !SP_IS_FLOWTEXT(item))
 199         {
 200             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("One of the objects is <b>not a path</b>, cannot perform boolean operation."));
 201             g_slist_free(il);
 202             return;
 203         }
 204     }
 205
 206     // extract the livarot Paths from the source objects
 207     // also get the winding rule specified in the style
 208     int nbOriginaux = g_slist_length(il);
 209     std::vector<Path *> originaux(nbOriginaux);
 210     std::vector<FillRule> origWind(nbOriginaux);
 211     int curOrig;
 212     {
 213         curOrig = 0;
 214         for (GSList *l = il; l != NULL; l = l->next)
 215         {
 216             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(il->data), "style");
 217             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 218             if (val && strcmp(val, "nonzero") == 0) {
 219                 origWind[curOrig]= fill_nonZero;
 220             } else if (val && strcmp(val, "evenodd") == 0) {
 221                 origWind[curOrig]= fill_oddEven;
 222             } else {
 223                 origWind[curOrig]= fill_nonZero;
 224             }
 225
 226             originaux[curOrig] = Path_for_item((SPItem *) l->data, true, true);
 227             if (originaux[curOrig] == NULL || originaux[curOrig]->descr_cmd.size() <= 1)
 228             {
 229                 for (int i = curOrig; i >= 0; i--) delete originaux[i];
 230                 g_slist_free(il);
 231                 return;
 232             }
 233             curOrig++;
 234         }
 235     }
 236     // reverse if needed
 237     // note that the selection list keeps its order
 238     if ( reverseOrderForOp ) {
 239         Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 240         FillRule swai=origWind[0]; origWind[0]=origWind[1]; origWind[1]=swai;
 241     }
 242
 243     // and work
 244     // some temporary instances, first
 245     Shape *theShapeA = new Shape;
 246     Shape *theShapeB = new Shape;
 247     Shape *theShape = new Shape;
 248     Path *res = new Path;
 249     res->SetBackData(false);
 250     Path::cut_position  *toCut=NULL;
 251     int                  nbToCut=0;
 252
 253     if ( bop == bool_op_inters || bop == bool_op_union || bop == bool_op_diff || bop == bool_op_symdiff ) {
 254         // true boolean op
 255         // get the polygons of each path, with the winding rule specified, and apply the operation iteratively
 256         originaux[0]->ConvertWithBackData(0.1);
 257
 258         originaux[0]->Fill(theShape, 0);
 259
 260         theShapeA->ConvertToShape(theShape, origWind[0]);
 261
 262         curOrig = 1;
 263         for (GSList *l = il->next; l != NULL; l = l->next) {
 264             originaux[curOrig]->ConvertWithBackData(0.1);
 265
 266             originaux[curOrig]->Fill(theShape, curOrig);
 267
 268             theShapeB->ConvertToShape(theShape, origWind[curOrig]);
 269
 270             // les elements arrivent en ordre inverse dans la liste
 271             theShape->Booleen(theShapeB, theShapeA, bop);
 272
 273             {
 274                 Shape *swap = theShape;
 275                 theShape = theShapeA;
 276                 theShapeA = swap;
 277             }
 278             curOrig++;
 279         }
 280
 281         {
 282             Shape *swap = theShape;
 283             theShape = theShapeA;
 284             theShapeA = swap;
 285         }
 286
 287     } else if ( bop == bool_op_cut ) {
 288         // cuts= sort of a bastard boolean operation, thus not the axact same modus operandi
 289         // technically, the cut path is not necessarily a polygon (thus has no winding rule)
 290         // it is just uncrossed, and cleaned from duplicate edges and points
 291         // then it's fed to Booleen() which will uncross it against the other path
 292         // then comes the trick: each edge of the cut path is duplicated (one in each direction),
 293         // thus making a polygon. the weight of the edges of the cut are all 0, but
 294         // the Booleen need to invert the ones inside the source polygon (for the subsequent
 295         // ConvertToForme)
 296
 297         // the cut path needs to have the highest pathID in the back data
 298         // that's how the Booleen() function knows it's an edge of the cut
 299
 300         // FIXME: this gives poor results, the final paths are full of extraneous nodes. Decreasing
 301         // ConvertWithBackData parameter below simply increases the number of nodes, so for now I
 302         // left it at 1.0. Investigate replacing this by a combination of difference and
 303         // intersection of the same two paths. -- bb
 304         {
 305             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 306             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 307         }
 308         originaux[0]->ConvertWithBackData(1.0);
 309
 310         originaux[0]->Fill(theShape, 0);
 311
 312         theShapeA->ConvertToShape(theShape, origWind[0]);
 313
 314         originaux[1]->ConvertWithBackData(1.0);
 315
 316         originaux[1]->Fill(theShape, 1,false,false,false); //do not closeIfNeeded
 317
 318         theShapeB->ConvertToShape(theShape, fill_justDont); // fill_justDont doesn't computes winding numbers
 319
 320         // les elements arrivent en ordre inverse dans la liste
 321         theShape->Booleen(theShapeB, theShapeA, bool_op_cut, 1);
 322
 323     } else if ( bop == bool_op_slice ) {
 324         // slice is not really a boolean operation
 325         // you just put the 2 shapes in a single polygon, uncross it
 326         // the points where the degree is > 2 are intersections
 327         // just check it's an intersection on the path you want to cut, and keep it
 328         // the intersections you have found are then fed to ConvertPositionsToMoveTo() which will
 329         // make new subpath at each one of these positions
 330         // inversion pour l'op\8eration
 331         {
 332             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 333             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 334         }
 335         originaux[0]->ConvertWithBackData(1.0);
 336
 337         originaux[0]->Fill(theShapeA, 0,false,false,false); // don't closeIfNeeded
 338
 339         originaux[1]->ConvertWithBackData(1.0);
 340
 341         originaux[1]->Fill(theShapeA, 1,true,false,false);// don't closeIfNeeded and just dump in the shape, don't reset it
 342
 343         theShape->ConvertToShape(theShapeA, fill_justDont);
 344
 345         if ( theShape->hasBackData() ) {
 346             // should always be the case, but ya never know
 347             {
 348                 for (int i = 0; i < theShape->numberOfPoints(); i++) {
 349                     if ( theShape->getPoint(i).totalDegree() > 2 ) {
 350                         // possibly an intersection
 351                         // we need to check that at least one edge from the source path is incident to it
 352                         // before we declare it's an intersection
 353                         int cb = theShape->getPoint(i).incidentEdge[FIRST];
 354                         int   nbOrig=0;
 355                         int   nbOther=0;
 356                         int   piece=-1;
 357                         float t=0.0;
 358                         while ( cb >= 0 && cb < theShape->numberOfEdges() ) {
 359                             if ( theShape->ebData[cb].pathID == 0 ) {
 360                                 // the source has an edge incident to the point, get its position on the path
 361                                 piece=theShape->ebData[cb].pieceID;
 362                                 if ( theShape->getEdge(cb).st == i ) {
 363                                     t=theShape->ebData[cb].tSt;
 364                                 } else {
 365                                     t=theShape->ebData[cb].tEn;
 366                                 }
 367                                 nbOrig++;
 368                             }
 369                             if ( theShape->ebData[cb].pathID == 1 ) nbOther++; // the cut is incident to this point
 370                             cb=theShape->NextAt(i, cb);
 371                         }
 372                         if ( nbOrig > 0 && nbOther > 0 ) {
 373                             // point incident to both path and cut: an intersection
 374                             // note that you only keep one position on the source; you could have degenerate
 375                             // cases where the source crosses itself at this point, and you wouyld miss an intersection
 376                             toCut=(Path::cut_position*)realloc(toCut, (nbToCut+1)*sizeof(Path::cut_position));
 377                             toCut[nbToCut].piece=piece;
 378                             toCut[nbToCut].t=t;
 379                             nbToCut++;
 380                         }
 381                     }
 382                 }
 383             }
 384             {
 385                 // i think it's useless now
 386                 int i = theShape->numberOfEdges() - 1;
 387                 for (;i>=0;i--) {
 388                     if ( theShape->ebData[i].pathID == 1 ) {
 389                         theShape->SubEdge(i);
 390                     }
 391                 }
 392             }
 393
 394         }
 395     }
 396
 397     int*    nesting=NULL;
 398     int*    conts=NULL;
 399     int     nbNest=0;
 400     // pour compenser le swap juste avant
 401     if ( bop == bool_op_slice ) {
 402 //    theShape->ConvertToForme(res, nbOriginaux, originaux, true);
 403 //    res->ConvertForcedToMoveTo();
 404         res->Copy(originaux[0]);
 405         res->ConvertPositionsToMoveTo(nbToCut, toCut); // cut where you found intersections
 406         free(toCut);
 407     } else if ( bop == bool_op_cut ) {
 408         // il faut appeler pour desallouer PointData (pas vital, mais bon)
 409         // the Booleen() function did not deallocated the point_data array in theShape, because this
 410         // function needs it.
 411         // this function uses the point_data to get the winding number of each path (ie: is a hole or not)
 412         // for later reconstruction in objects, you also need to extract which path is parent of holes (nesting info)
 413         theShape->ConvertToFormeNested(res, nbOriginaux, &originaux[0], 1, nbNest, nesting, conts);
 414     } else {
 415         theShape->ConvertToForme(res, nbOriginaux, &originaux[0]);
 416     }
 417
 418     delete theShape;
 419     delete theShapeA;
 420     delete theShapeB;
 421     for (int i = 0; i < nbOriginaux; i++)  delete originaux[i];
 422
 423     if (res->descr_cmd.size() <= 1)
 424     {
 425         // only one command, presumably a moveto: it isn't a path
 426         for (GSList *l = il; l != NULL; l = l->next)
 427         {
 428             SP_OBJECT(l->data)->deleteObject();
 429         }
 430         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 431                          description);
 432         selection->clear();
 433
 434         delete res;
 435         g_slist_free(il);
 436         return;
 437     }
 438
 439     // get the source path object
 440     SPObject *source;
 441     if ( bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 442         if (reverseOrderForOp) {
 443              source = SP_OBJECT(il->data);
 444         } else {
 445              source = SP_OBJECT(il->next->data);
 446         }
 447     } else {
 448         // find out the bottom object
 449         GSList *sorted = g_slist_copy((GSList *) selection->reprList());
 450
 451         sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
 452
 453         source = sp_desktop_document(desktop)->
 454             getObjectByRepr((Inkscape::XML::Node *)sorted->data);
 455
 456         g_slist_free(sorted);
 457     }
 458
 459     // adjust style properties that depend on a possible transform in the source object in order
 460     // to get a correct style attribute for the new path
 461     SPItem* item_source = SP_ITEM(source);
 462     NR::Matrix i2root = from_2geom(sp_item_i2root_affine(item_source));
 463     sp_item_adjust_stroke(item_source, NR::expansion(i2root));
 464     sp_item_adjust_pattern(item_source, i2root);
 465     sp_item_adjust_gradient(item_source, i2root);
 466     sp_item_adjust_livepatheffect(item_source, i2root);
 467
 468     Inkscape::XML::Node *repr_source = SP_OBJECT_REPR(source);
 469
 470     // remember important aspects of the source path, to be restored
 471     gint pos = repr_source->position();
 472     Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
 473     gchar const *id = repr_source->attribute("id");
 474     gchar const *style = repr_source->attribute("style");
 475     gchar const *mask = repr_source->attribute("mask");
 476     gchar const *clip_path = repr_source->attribute("clip-path");
 477
 478     // remove source paths
 479     selection->clear();
 480     for (GSList *l = il; l != NULL; l = l->next) {
 481         // if this is the bottommost object,
 482         if (!strcmp(SP_OBJECT_REPR(l->data)->attribute("id"), id)) {
 483             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 484             SP_OBJECT(l->data)->deleteObject(false);
 485         } else {
 486             // delete the object for real, so that its clones can take appropriate action
 487             SP_OBJECT(l->data)->deleteObject();
 488         }
 489     }
 490     g_slist_free(il);
 491
 492     // premultiply by the inverse of parent's repr
 493     SPItem *parent_item = SP_ITEM(sp_desktop_document(desktop)->getObjectByRepr(parent));
 494     NR::Matrix local = from_2geom(sp_item_i2doc_affine(parent_item));
 495     gchar *transform = sp_svg_transform_write(local.inverse());
 496
 497     // now that we have the result, add it on the canvas
 498     if ( bop == bool_op_cut || bop == bool_op_slice ) {
 499         int    nbRP=0;
 500         Path** resPath;
 501         if ( bop == bool_op_slice ) {
 502             // there are moveto's at each intersection, but it's still one unique path
 503             // so break it down and add each subpath independently
 504             // we could call break_apart to do this, but while we have the description...
 505             resPath=res->SubPaths(nbRP, false);
 506         } else {
 507             // cut operation is a bit wicked: you need to keep holes
 508             // that's why you needed the nesting
 509             // ConvertToFormeNested() dumped all the subpath in a single Path "res", so we need
 510             // to get the path for each part of the polygon. that's why you need the nesting info:
 511             // to know in wich subpath to add a subpath
 512             resPath=res->SubPathsWithNesting(nbRP, true, nbNest, nesting, conts);
 513
 514             // cleaning
 515             if ( conts ) free(conts);
 516             if ( nesting ) free(nesting);
 517         }
 518
 519         // add all the pieces resulting from cut or slice
 520         for (int i=0;i<nbRP;i++) {
 521             gchar *d = resPath[i]->svg_dump_path();
 522
 523             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 524             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 525             repr->setAttribute("style", style);
 526             if (mask)
 527                 repr->setAttribute("mask", mask);
 528             if (clip_path)
 529                 repr->setAttribute("clip-path", clip_path);
 530
 531             repr->setAttribute("d", d);
 532             g_free(d);
 533
 534             // for slice, remove fill
 535             if (bop == bool_op_slice) {
 536                 SPCSSAttr *css;
 537
 538                 css = sp_repr_css_attr_new();
 539                 sp_repr_css_set_property(css, "fill", "none");
 540
 541                 sp_repr_css_change(repr, css, "style");
 542
 543                 sp_repr_css_attr_unref(css);
 544             }
 545
 546             // we assign the same id on all pieces, but it on adding to document, it will be changed on all except one
 547             // this means it's basically random which of the pieces inherits the original's id and clones
 548             // a better algorithm might figure out e.g. the biggest piece
 549             repr->setAttribute("id", id);
 550
 551             repr->setAttribute("transform", transform);
 552
 553             // add the new repr to the parent
 554             parent->appendChild(repr);
 555
 556             // move to the saved position
 557             repr->setPosition(pos > 0 ? pos : 0);
 558
 559             selection->add(repr);
 560             Inkscape::GC::release(repr);
 561
 562             delete resPath[i];
 563         }
 564         if ( resPath ) free(resPath);
 565
 566     } else {
 567         gchar *d = res->svg_dump_path();
 568
 569         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 570         Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 571         repr->setAttribute("style", style);
 572
 573         if ( mask )
 574             repr->setAttribute("mask", mask);
 575
 576         if ( clip_path )
 577             repr->setAttribute("clip-path", clip_path);
 578
 579         repr->setAttribute("d", d);
 580         g_free(d);
 581
 582         repr->setAttribute("transform", transform);
 583
 584         repr->setAttribute("id", id);
 585         parent->appendChild(repr);
 586         repr->setPosition(pos > 0 ? pos : 0);
 587
 588         selection->add(repr);
 589         Inkscape::GC::release(repr);
 590     }
 591
 592     g_free(transform);
 593
 594     if (verb != SP_VERB_NONE) {
 595         sp_document_done(sp_desktop_document(desktop), verb, description);
 596     }
 597
 598     delete res;
 599 }
 600
 601 static
 602 void sp_selected_path_outline_add_marker( SPObject *marker_object, Geom::Matrix marker_transform, NR::scale stroke_scale, NR::Matrix transform,
 603                                        Inkscape::XML::Node *g_repr, Inkscape::XML::Document *xml_doc, SPDocument * doc )
 604 {
 605     SPMarker* marker = SP_MARKER (marker_object);
 606     SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker_object));
 607
 608     NR::Matrix tr(from_2geom(marker_transform));
 609
 610     if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
 611         tr = stroke_scale * tr;
 612     }
 613
 614     // total marker transform
 615     tr = marker_item->transform * marker->c2p * tr * transform;
 616
 617     if (SP_OBJECT_REPR(marker_item)) {
 618         Inkscape::XML::Node *m_repr = SP_OBJECT_REPR(marker_item)->duplicate(xml_doc);
 619         g_repr->appendChild(m_repr);
 620         SPItem *marker_item = (SPItem *) doc->getObjectByRepr(m_repr);
 621         sp_item_write_transform(marker_item, m_repr, tr);
 622     }
 623 }
 624
 625 void
 626 sp_selected_path_outline()
 627 {
 628     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 629
 630     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 631
 632     if (selection->isEmpty()) {
 633         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>stroked path(s)</b> to convert stroke to path."));
 634         return;
 635     }
 636
 637     bool did = false;
 638
 639     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 640          items != NULL;
 641          items = items->next) {
 642
 643         SPItem *item = (SPItem *) items->data;
 644
 645         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 646             continue;
 647
 648         SPCurve *curve = NULL;
 649         if (SP_IS_SHAPE(item)) {
 650             curve = sp_shape_get_curve(SP_SHAPE(item));
 651             if (curve == NULL)
 652                 continue;
 653         }
 654         if (SP_IS_TEXT(item)) {
 655             curve = SP_TEXT(item)->getNormalizedBpath();
 656             if (curve == NULL)
 657                 continue;
 658         }
 659
 660         {   // pas de stroke pas de chocolat
 661             SPCSSAttr *css = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 662             gchar const *val = sp_repr_css_property(css, "stroke", NULL);
 663
 664             if (val == NULL || strcmp(val, "none") == 0) {
 665                 curve->unref();
 666                 continue;
 667             }
 668         }
 669
 670         // remember old stroke style, to be set on fill
 671         SPCSSAttr *ncss;
 672         {
 673             SPCSSAttr *ocss = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 674             gchar const *val = sp_repr_css_property(ocss, "stroke", NULL);
 675             gchar const *opac = sp_repr_css_property(ocss, "stroke-opacity", NULL);
 676
 677             ncss = sp_repr_css_attr_new();
 678
 679             sp_repr_css_set_property(ncss, "stroke", "none");
 680             sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
 681             sp_repr_css_set_property(ncss, "fill", val);
 682             if ( opac ) {
 683                 sp_repr_css_set_property(ncss, "fill-opacity", opac);
 684             } else {
 685                 sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
 686             }
 687             sp_repr_css_unset_property(ncss, "marker-start");
 688             sp_repr_css_unset_property(ncss, "marker-mid");
 689             sp_repr_css_unset_property(ncss, "marker-end");
 690         }
 691
 692         NR::Matrix const transform(item->transform);
 693         float const scale = NR::expansion(transform);
 694         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
 695         SPStyle *i_style = SP_OBJECT(item)->style;
 696         gchar const *mask = SP_OBJECT_REPR(item)->attribute("mask");
 697         gchar const *clip_path = SP_OBJECT_REPR(item)->attribute("clip-path");
 698
 699         float o_width, o_miter;
 700         JoinType o_join;
 701         ButtType o_butt;
 702
 703         {
 704             int jointype, captype;
 705
 706             jointype = i_style->stroke_linejoin.computed;
 707             captype = i_style->stroke_linecap.computed;
 708             o_width = i_style->stroke_width.computed;
 709
 710             switch (jointype) {
 711                 case SP_STROKE_LINEJOIN_MITER:
 712                     o_join = join_pointy;
 713                     break;
 714                 case SP_STROKE_LINEJOIN_ROUND:
 715                     o_join = join_round;
 716                     break;
 717                 default:
 718                     o_join = join_straight;
 719                     break;
 720             }
 721
 722             switch (captype) {
 723                 case SP_STROKE_LINECAP_SQUARE:
 724                     o_butt = butt_square;
 725                     break;
 726                 case SP_STROKE_LINECAP_ROUND:
 727                     o_butt = butt_round;
 728                     break;
 729                 default:
 730                     o_butt = butt_straight;
 731                     break;
 732             }
 733
 734             if (o_width < 0.1)
 735                 o_width = 0.1;
 736             o_miter = i_style->stroke_miterlimit.value * o_width;
 737         }
 738
 739         Path *orig = Path_for_item(item, false);
 740         if (orig == NULL) {
 741             g_free(style);
 742             curve->unref();
 743             continue;
 744         }
 745
 746         Path *res = new Path;
 747         res->SetBackData(false);
 748
 749         if (i_style->stroke_dash.n_dash) {
 750             // For dashed strokes, use Stroke method, because Outline can't do dashes
 751             // However Stroke adds lots of extra nodes _or_ makes the path crooked, so consider this a temporary workaround
 752
 753             orig->ConvertWithBackData(0.1);
 754
 755             orig->DashPolylineFromStyle(i_style, scale, 0);
 756
 757             Shape* theShape = new Shape;
 758             orig->Stroke(theShape, false, 0.5*o_width, o_join, o_butt,
 759                          0.5 * o_miter);
 760             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 761
 762             Shape *theRes = new Shape;
 763
 764             theRes->ConvertToShape(theShape, fill_positive);
 765
 766             Path *originaux[1];
 767             originaux[0] = res;
 768             theRes->ConvertToForme(orig, 1, originaux);
 769
 770             res->Coalesce(5.0);
 771
 772             delete theShape;
 773             delete theRes;
 774
 775         } else {
 776
 777             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 778
 779             orig->Coalesce(0.5 * o_width);
 780
 781             Shape *theShape = new Shape;
 782             Shape *theRes = new Shape;
 783
 784             res->ConvertWithBackData(1.0);
 785             res->Fill(theShape, 0);
 786             theRes->ConvertToShape(theShape, fill_positive);
 787
 788             Path *originaux[1];
 789             originaux[0] = res;
 790             theRes->ConvertToForme(orig, 1, originaux);
 791
 792             delete theShape;
 793             delete theRes;
 794         }
 795
 796         if (orig->descr_cmd.size() <= 1) {
 797             // ca a merd\8e, ou bien le resultat est vide
 798             delete res;
 799             delete orig;
 800             g_free(style);
 801             continue;
 802         }
 803
 804         did = true;
 805
 806         // remember the position of the item
 807         gint pos = SP_OBJECT_REPR(item)->position();
 808         // remember parent
 809         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 810         // remember id
 811         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 812
 813         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
 814
 815             SPDocument * doc = sp_desktop_document(desktop);
 816             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 817             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 818
 819             // restore old style
 820             repr->setAttribute("style", style);
 821
 822             // set old stroke style on fill
 823             sp_repr_css_change(repr, ncss, "style");
 824
 825             sp_repr_css_attr_unref(ncss);
 826
 827             gchar *str = orig->svg_dump_path();
 828             repr->setAttribute("d", str);
 829             g_free(str);
 830
 831             if (mask)
 832                 repr->setAttribute("mask", mask);
 833             if (clip_path)
 834                 repr->setAttribute("clip-path", clip_path);
 835
 836             if (SP_IS_SHAPE(item) && sp_shape_has_markers (SP_SHAPE(item))) {
 837
 838                 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 839                 Inkscape::XML::Node *g_repr = xml_doc->createElement("svg:g");
 840
 841                 // add the group to the parent
 842                 parent->appendChild(g_repr);
 843                 // move to the saved position
 844                 g_repr->setPosition(pos > 0 ? pos : 0);
 845
 846                 g_repr->appendChild(repr);
 847                 repr->setAttribute("id", id);
 848                 SPItem *newitem = (SPItem *) doc->getObjectByRepr(repr);
 849                 sp_item_write_transform(newitem, repr, transform);
 850
 851                 SPShape *shape = SP_SHAPE(item);
 852
 853                 Geom::PathVector const & pathv = curve->get_pathvector();
 854                 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
 855                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_START] ) {
 856                         Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
 857                         sp_selected_path_outline_add_marker( marker_obj, m,
 858                                                              NR::scale(i_style->stroke_width.computed), transform,
 859                                                              g_repr, xml_doc, doc );
 860                     }
 861
 862                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_MID] ) {
 863                         Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
 864                         Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
 865                         while (curve_it2 != path_it->end_default())
 866                         {
 867                             /* Put marker between curve_it1 and curve_it2.
 868                              * Loop to end_default (so including closing segment), because when a path is closed,
 869                              * there should be a midpoint marker between last segment and closing straight line segment
 870                              */
 871                             Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
 872                             sp_selected_path_outline_add_marker( marker_obj, m,
 873                                                                  NR::scale(i_style->stroke_width.computed), transform,
 874                                                                  g_repr, xml_doc, doc );
 875
 876                             ++curve_it1;
 877                             ++curve_it2;
 878                         }
 879                     }
 880
 881                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_END] ) {
 882                         Geom::Matrix const m (sp_shape_marker_get_transform_at_end(path_it->back_default()));
 883                         sp_selected_path_outline_add_marker( marker_obj, m,
 884                                                              NR::scale(i_style->stroke_width.computed), transform,
 885                                                              g_repr, xml_doc, doc );
 886                     }
 887                 }
 888
 889                 selection->add(g_repr);
 890
 891                 Inkscape::GC::release(g_repr);
 892
 893
 894             } else {
 895
 896                 // add the new repr to the parent
 897                 parent->appendChild(repr);
 898
 899                 // move to the saved position
 900                 repr->setPosition(pos > 0 ? pos : 0);
 901
 902                 repr->setAttribute("id", id);
 903
 904                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 905                 sp_item_write_transform(newitem, repr, transform);
 906
 907                 selection->add(repr);
 908
 909             }
 910
 911             Inkscape::GC::release(repr);
 912
 913             curve->unref();
 914             selection->remove(item);
 915             SP_OBJECT(item)->deleteObject(false);
 916
 917         }
 918
 919         delete res;
 920         delete orig;
 921         g_free(style);
 922
 923     }
 924
 925     if (did) {
 926         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_OUTLINE,
 927                          _("Convert stroke to path"));
 928     } else {
 929         // TRANSLATORS: "to outline" means "to convert stroke to path"
 930         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> in the selection."));
 931         return;
 932     }
 933 }
 934
 935
 936 void
 937 sp_selected_path_offset()
 938 {
 939     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 940
 941     sp_selected_path_do_offset(true, prefOffset);
 942 }
 943 void
 944 sp_selected_path_inset()
 945 {
 946     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 947
 948     sp_selected_path_do_offset(false, prefOffset);
 949 }
 950
 951 void
 952 sp_selected_path_offset_screen(double pixels)
 953 {
 954     sp_selected_path_do_offset(true,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 955 }
 956
 957 void
 958 sp_selected_path_inset_screen(double pixels)
 959 {
 960     sp_selected_path_do_offset(false,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 961 }
 962
 963
 964 void sp_selected_path_create_offset_object_zero()
 965 {
 966     sp_selected_path_create_offset_object(0, false);
 967 }
 968
 969 void sp_selected_path_create_offset()
 970 {
 971     sp_selected_path_create_offset_object(1, false);
 972 }
 973 void sp_selected_path_create_inset()
 974 {
 975     sp_selected_path_create_offset_object(-1, false);
 976 }
 977
 978 void sp_selected_path_create_updating_offset_object_zero()
 979 {
 980     sp_selected_path_create_offset_object(0, true);
 981 }
 982
 983 void sp_selected_path_create_updating_offset()
 984 {
 985     sp_selected_path_create_offset_object(1, true);
 986 }
 987 void sp_selected_path_create_updating_inset()
 988 {
 989     sp_selected_path_create_offset_object(-1, true);
 990 }
 991
 992 void
 993 sp_selected_path_create_offset_object(int expand, bool updating)
 994 {
 995     Inkscape::Selection *selection;
 996     Inkscape::XML::Node *repr;
 997     SPItem *item;
 998     SPCurve *curve;
 999     gchar *style, *str;
1000     SPDesktop *desktop;
1001     float o_width, o_miter;
1002     JoinType o_join;
1003     ButtType o_butt;
1004
1005     curve = NULL;
1006
1007     desktop = SP_ACTIVE_DESKTOP;
1008
1009     selection = sp_desktop_selection(desktop);
1010
1011     item = selection->singleItem();
1012
1013     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
1014         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
1015         return;
1016     }
1017     if (SP_IS_SHAPE(item))
1018     {
1019         curve = sp_shape_get_curve(SP_SHAPE(item));
1020         if (curve == NULL)
1021             return;
1022     }
1023     if (SP_IS_TEXT(item))
1024     {
1025         curve = SP_TEXT(item)->getNormalizedBpath();
1026         if (curve == NULL)
1027             return;
1028     }
1029
1030     NR::Matrix const transform(item->transform);
1031
1032     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1033
1034     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
1035
1036     // remember the position of the item
1037     gint pos = SP_OBJECT_REPR(item)->position();
1038     // remember parent
1039     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1040
1041     {
1042         SPStyle *i_style = SP_OBJECT(item)->style;
1043         int jointype, captype;
1044
1045         jointype = i_style->stroke_linejoin.value;
1046         captype = i_style->stroke_linecap.value;
1047         o_width = i_style->stroke_width.computed;
1048         if (jointype == SP_STROKE_LINEJOIN_MITER)
1049         {
1050             o_join = join_pointy;
1051         }
1052         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
1053         {
1054             o_join = join_round;
1055         }
1056         else
1057         {
1058             o_join = join_straight;
1059         }
1060         if (captype == SP_STROKE_LINECAP_SQUARE)
1061         {
1062             o_butt = butt_square;
1063         }
1064         else if (captype == SP_STROKE_LINECAP_ROUND)
1065         {
1066             o_butt = butt_round;
1067         }
1068         else
1069         {
1070             o_butt = butt_straight;
1071         }
1072
1073         {
1074             double prefOffset = 1.0;
1075             prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", prefOffset);
1076             o_width = prefOffset;
1077         }
1078
1079         if (o_width < 0.01)
1080             o_width = 0.01;
1081         o_miter = i_style->stroke_miterlimit.value * o_width;
1082     }
1083
1084     Path *orig = Path_for_item(item, true, false);
1085     if (orig == NULL)
1086     {
1087         g_free(style);
1088         curve->unref();
1089         return;
1090     }
1091
1092     Path *res = new Path;
1093     res->SetBackData(false);
1094
1095     {
1096         Shape *theShape = new Shape;
1097         Shape *theRes = new Shape;
1098
1099         orig->ConvertWithBackData(1.0);
1100         orig->Fill(theShape, 0);
1101
1102         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1103         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1104         if (val && strcmp(val, "nonzero") == 0)
1105         {
1106             theRes->ConvertToShape(theShape, fill_nonZero);
1107         }
1108         else if (val && strcmp(val, "evenodd") == 0)
1109         {
1110             theRes->ConvertToShape(theShape, fill_oddEven);
1111         }
1112         else
1113         {
1114             theRes->ConvertToShape(theShape, fill_nonZero);
1115         }
1116
1117         Path *originaux[1];
1118         originaux[0] = orig;
1119         theRes->ConvertToForme(res, 1, originaux);
1120
1121         delete theShape;
1122         delete theRes;
1123     }
1124
1125     curve->unref();
1126
1127     if (res->descr_cmd.size() <= 1)
1128     {
1129         // pas vraiment de points sur le resultat
1130         // donc il ne reste rien
1131         sp_document_done(sp_desktop_document(desktop),
1132                          (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1133                           : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1134                          (updating ? _("Create linked offset")
1135                           : _("Create dynamic offset")));
1136         selection->clear();
1137
1138         delete res;
1139         delete orig;
1140         g_free(style);
1141         return;
1142     }
1143
1144     {
1145         gchar tstr[80];
1146
1147         tstr[79] = '\0';
1148
1149         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1150         repr = xml_doc->createElement("svg:path");
1151         repr->setAttribute("sodipodi:type", "inkscape:offset");
1152         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1153                                                           ? o_width
1154                                                           : expand < 0
1155                                                           ? -o_width
1156                                                           : 0 ));
1157
1158         str = res->svg_dump_path();
1159         repr->setAttribute("inkscape:original", str);
1160         g_free(str);
1161
1162         if ( updating ) {
1163             char const *id = SP_OBJECT(item)->repr->attribute("id");
1164             char const *uri = g_strdup_printf("#%s", id);
1165             repr->setAttribute("xlink:href", uri);
1166             g_free((void *) uri);
1167         } else {
1168             repr->setAttribute("inkscape:href", NULL);
1169         }
1170
1171         repr->setAttribute("style", style);
1172
1173         // add the new repr to the parent
1174         parent->appendChild(repr);
1175
1176         // move to the saved position
1177         repr->setPosition(pos > 0 ? pos : 0);
1178
1179         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1180
1181         if ( updating ) {
1182             // on conserve l'original
1183             // we reapply the transform to the original (offset will feel it)
1184             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1185         } else {
1186             // delete original, apply the transform to the offset
1187             SP_OBJECT(item)->deleteObject(false);
1188             sp_item_write_transform(nitem, repr, transform);
1189         }
1190
1191         // The object just created from a temporary repr is only a seed.
1192         // We need to invoke its write which will update its real repr (in particular adding d=)
1193         SP_OBJECT(nitem)->updateRepr();
1194
1195         Inkscape::GC::release(repr);
1196
1197         selection->set(nitem);
1198     }
1199
1200     sp_document_done(sp_desktop_document(desktop),
1201                      (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1202                       : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1203                      (updating ? _("Create linked offset")
1204                       : _("Create dynamic offset")));
1205
1206     delete res;
1207     delete orig;
1208
1209     g_free(style);
1210 }
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223 void
1224 sp_selected_path_do_offset(bool expand, double prefOffset)
1225 {
1226     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1227
1228     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1229
1230     if (selection->isEmpty()) {
1231         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1232         return;
1233     }
1234
1235     bool did = false;
1236
1237     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1238          items != NULL;
1239          items = items->next) {
1240
1241         SPItem *item = (SPItem *) items->data;
1242
1243         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1244             continue;
1245
1246         SPCurve *curve = NULL;
1247         if (SP_IS_SHAPE(item)) {
1248             curve = sp_shape_get_curve(SP_SHAPE(item));
1249             if (curve == NULL)
1250                 continue;
1251         }
1252         if (SP_IS_TEXT(item)) {
1253             curve = SP_TEXT(item)->getNormalizedBpath();
1254             if (curve == NULL)
1255                 continue;
1256         }
1257
1258         NR::Matrix const transform(item->transform);
1259
1260         sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1261
1262         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1263
1264         float o_width, o_miter;
1265         JoinType o_join;
1266         ButtType o_butt;
1267
1268         {
1269             SPStyle *i_style = SP_OBJECT(item)->style;
1270             int jointype, captype;
1271
1272             jointype = i_style->stroke_linejoin.value;
1273             captype = i_style->stroke_linecap.value;
1274             o_width = i_style->stroke_width.computed;
1275
1276             switch (jointype) {
1277                 case SP_STROKE_LINEJOIN_MITER:
1278                     o_join = join_pointy;
1279                     break;
1280                 case SP_STROKE_LINEJOIN_ROUND:
1281                     o_join = join_round;
1282                     break;
1283                 default:
1284                     o_join = join_straight;
1285                     break;
1286             }
1287
1288             switch (captype) {
1289                 case SP_STROKE_LINECAP_SQUARE:
1290                     o_butt = butt_square;
1291                     break;
1292                 case SP_STROKE_LINECAP_ROUND:
1293                     o_butt = butt_round;
1294                     break;
1295                 default:
1296                     o_butt = butt_straight;
1297                     break;
1298             }
1299
1300             o_width = prefOffset;
1301
1302             if (o_width < 0.1)
1303                 o_width = 0.1;
1304             o_miter = i_style->stroke_miterlimit.value * o_width;
1305         }
1306
1307         Path *orig = Path_for_item(item, false);
1308         if (orig == NULL) {
1309             g_free(style);
1310             curve->unref();
1311             continue;
1312         }
1313
1314         Path *res = new Path;
1315         res->SetBackData(false);
1316
1317         {
1318             Shape *theShape = new Shape;
1319             Shape *theRes = new Shape;
1320
1321             orig->ConvertWithBackData(0.03);
1322             orig->Fill(theShape, 0);
1323
1324             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1325             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1326             if (val && strcmp(val, "nonzero") == 0)
1327             {
1328                 theRes->ConvertToShape(theShape, fill_nonZero);
1329             }
1330             else if (val && strcmp(val, "evenodd") == 0)
1331             {
1332                 theRes->ConvertToShape(theShape, fill_oddEven);
1333             }
1334             else
1335             {
1336                 theRes->ConvertToShape(theShape, fill_nonZero);
1337             }
1338
1339             // et maintenant: offset
1340             // methode inexacte
1341 /*                      Path *originaux[1];
1342                         originaux[0] = orig;
1343                         theRes->ConvertToForme(res, 1, originaux);
1344
1345                         if (expand) {
1346                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1347                         } else {
1348                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1349                         }
1350
1351                         orig->ConvertWithBackData(1.0);
1352                         orig->Fill(theShape, 0);
1353                         theRes->ConvertToShape(theShape, fill_positive);
1354                         originaux[0] = orig;
1355                         theRes->ConvertToForme(res, 1, originaux);
1356
1357                         if (o_width >= 0.5) {
1358                         //     res->Coalesce(1.0);
1359                         res->ConvertEvenLines(1.0);
1360                         res->Simplify(1.0);
1361                         } else {
1362                         //      res->Coalesce(o_width);
1363                         res->ConvertEvenLines(1.0*o_width);
1364                         res->Simplify(1.0 * o_width);
1365                         }    */
1366             // methode par makeoffset
1367
1368             if (expand)
1369             {
1370                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1371             }
1372             else
1373             {
1374                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1375             }
1376             theRes->ConvertToShape(theShape, fill_positive);
1377
1378             res->Reset();
1379             theRes->ConvertToForme(res);
1380
1381             if (o_width >= 1.0)
1382             {
1383                 res->ConvertEvenLines(1.0);
1384                 res->Simplify(1.0);
1385             }
1386             else
1387             {
1388                 res->ConvertEvenLines(1.0*o_width);
1389                 res->Simplify(1.0 * o_width);
1390             }
1391
1392             delete theShape;
1393             delete theRes;
1394         }
1395
1396         did = true;
1397
1398         curve->unref();
1399         // remember the position of the item
1400         gint pos = SP_OBJECT_REPR(item)->position();
1401         // remember parent
1402         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1403         // remember id
1404         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1405
1406         selection->remove(item);
1407         SP_OBJECT(item)->deleteObject(false);
1408
1409         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1410
1411             gchar tstr[80];
1412
1413             tstr[79] = '\0';
1414
1415             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1416             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1417
1418             repr->setAttribute("style", style);
1419
1420             gchar *str = res->svg_dump_path();
1421             repr->setAttribute("d", str);
1422             g_free(str);
1423
1424             // add the new repr to the parent
1425             parent->appendChild(repr);
1426
1427             // move to the saved position
1428             repr->setPosition(pos > 0 ? pos : 0);
1429
1430             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1431
1432             // reapply the transform
1433             sp_item_write_transform(newitem, repr, transform);
1434
1435             repr->setAttribute("id", id);
1436
1437             selection->add(repr);
1438
1439             Inkscape::GC::release(repr);
1440         }
1441
1442         delete orig;
1443         delete res;
1444     }
1445
1446     if (did) {
1447         sp_document_done(sp_desktop_document(desktop),
1448                          (expand ? SP_VERB_SELECTION_OFFSET : SP_VERB_SELECTION_INSET),
1449                          (expand ? _("Outset path") : _("Inset path")));
1450     } else {
1451         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1452         return;
1453     }
1454 }
1455
1456
1457 static bool
1458 sp_selected_path_simplify_items(SPDesktop *desktop,
1459                                 Inkscape::Selection *selection, GSList *items,
1460                                 float threshold,  bool justCoalesce,
1461                                 float angleLimit, bool breakableAngles,
1462                                 bool modifySelection);
1463
1464
1465 //return true if we changed something, else false
1466 bool
1467 sp_selected_path_simplify_item(SPDesktop *desktop,
1468                  Inkscape::Selection *selection, SPItem *item,
1469                  float threshold,  bool justCoalesce,
1470                  float angleLimit, bool breakableAngles,
1471                  gdouble size,     bool modifySelection)
1472 {
1473     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1474         return false;
1475
1476     //If this is a group, do the children instead
1477     if (SP_IS_GROUP(item)) {
1478         GSList *items = sp_item_group_item_list(SP_GROUP(item));
1479
1480         return sp_selected_path_simplify_items(desktop, selection, items,
1481                                                threshold, justCoalesce,
1482                                                angleLimit, breakableAngles,
1483                                                false);
1484     }
1485
1486
1487     SPCurve *curve = NULL;
1488
1489     if (SP_IS_SHAPE(item)) {
1490         curve = sp_shape_get_curve(SP_SHAPE(item));
1491         if (!curve)
1492             return false;
1493     }
1494
1495     if (SP_IS_TEXT(item)) {
1496         curve = SP_TEXT(item)->getNormalizedBpath();
1497         if (!curve)
1498             return false;
1499     }
1500
1501     // save the transform, to re-apply it after simplification
1502     NR::Matrix const transform(item->transform);
1503
1504     /*
1505        reset the transform, effectively transforming the item by transform.inverse();
1506        this is necessary so that the item is transformed twice back and forth,
1507        allowing all compensations to cancel out regardless of the preferences
1508     */
1509     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1510
1511     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1512     gchar *mask = g_strdup(SP_OBJECT_REPR(item)->attribute("mask"));
1513     gchar *clip_path = g_strdup(SP_OBJECT_REPR(item)->attribute("clip-path"));
1514
1515     Path *orig = Path_for_item(item, false);
1516     if (orig == NULL) {
1517         g_free(style);
1518         curve->unref();
1519         return false;
1520     }
1521
1522     curve->unref();
1523     // remember the position of the item
1524     gint pos = SP_OBJECT_REPR(item)->position();
1525     // remember parent
1526     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1527     // remember id
1528     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1529     // remember path effect
1530     char const *patheffect = SP_OBJECT_REPR(item)->attribute("inkscape:path-effect");
1531
1532     //If a group was selected, to not change the selection list
1533     if (modifySelection)
1534         selection->remove(item);
1535
1536     SP_OBJECT(item)->deleteObject(false);
1537
1538     if ( justCoalesce ) {
1539         orig->Coalesce(threshold * size);
1540     } else {
1541         orig->ConvertEvenLines(threshold * size);
1542         orig->Simplify(threshold * size);
1543     }
1544
1545     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1546     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1547
1548     // restore style, mask and clip-path
1549     repr->setAttribute("style", style);
1550     g_free(style);
1551
1552     if ( mask ) {
1553         repr->setAttribute("mask", mask);
1554         g_free(mask);
1555     }
1556
1557     if ( clip_path ) {
1558         repr->setAttribute("clip-path", clip_path);
1559         g_free(clip_path);
1560     }
1561
1562     // path
1563     gchar *str = orig->svg_dump_path();
1564     if (patheffect)
1565         repr->setAttribute("inkscape:original-d", str);
1566     else
1567         repr->setAttribute("d", str);
1568     g_free(str);
1569
1570     // restore id
1571     repr->setAttribute("id", id);
1572
1573     // add the new repr to the parent
1574     parent->appendChild(repr);
1575
1576     // move to the saved position
1577     repr->setPosition(pos > 0 ? pos : 0);
1578
1579     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1580
1581     // reapply the transform
1582     sp_item_write_transform(newitem, repr, transform);
1583
1584     // restore path effect
1585     repr->setAttribute("inkscape:path-effect", patheffect);
1586
1587     //If we are not in a selected group
1588     if (modifySelection)
1589         selection->add(repr);
1590
1591     Inkscape::GC::release(repr);
1592
1593     // clean up
1594     if (orig) delete orig;
1595
1596     return true;
1597 }
1598
1599
1600 bool
1601 sp_selected_path_simplify_items(SPDesktop *desktop,
1602                                 Inkscape::Selection *selection, GSList *items,
1603                                 float threshold,  bool justCoalesce,
1604                                 float angleLimit, bool breakableAngles,
1605                                 bool modifySelection)
1606 {
1607   bool simplifyIndividualPaths =
1608     (bool) prefs_get_int_attribute("options.simplifyindividualpaths", "value", 0);
1609
1610   gchar *simplificationType;
1611   if (simplifyIndividualPaths) {
1612       simplificationType = _("Simplifying paths (separately):");
1613   } else {
1614       simplificationType = _("Simplifying paths:");
1615   }
1616
1617   bool didSomething = false;
1618
1619   NR::Maybe<NR::Rect> selectionBbox = selection->bounds();
1620   if (!selectionBbox) {
1621     return false;
1622   }
1623   gdouble selectionSize  = L2(selectionBbox->dimensions());
1624
1625   gdouble simplifySize  = selectionSize;
1626
1627   int pathsSimplified = 0;
1628   int totalPathCount  = g_slist_length(items);
1629
1630   // set "busy" cursor
1631   desktop->setWaitingCursor();
1632
1633   for (; items != NULL; items = items->next) {
1634       SPItem *item = (SPItem *) items->data;
1635
1636       if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1637           continue;
1638
1639       if (simplifyIndividualPaths) {
1640           NR::Maybe<NR::Rect> itemBbox = item->getBounds(from_2geom(sp_item_i2d_affine(item)));
1641           if (itemBbox) {
1642               simplifySize      = L2(itemBbox->dimensions());
1643           } else {
1644               simplifySize      = 0;
1645           }
1646       }
1647
1648       pathsSimplified++;
1649
1650       if (pathsSimplified % 20 == 0) {
1651         gchar *message = g_strdup_printf(_("%s <b>%d</b> of <b>%d</b> paths simplified..."), simplificationType, pathsSimplified, totalPathCount);
1652         desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, message);
1653       }
1654
1655       didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1656                           threshold, justCoalesce, angleLimit, breakableAngles, simplifySize, modifySelection);
1657   }
1658
1659   desktop->clearWaitingCursor();
1660
1661   if (pathsSimplified > 20) {
1662     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, g_strdup_printf(_("<b>%d</b> paths simplified."), pathsSimplified));
1663   }
1664
1665   return didSomething;
1666 }
1667
1668 void
1669 sp_selected_path_simplify_selection(float threshold, bool justCoalesce,
1670                        float angleLimit, bool breakableAngles)
1671 {
1672     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1673
1674     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1675
1676     if (selection->isEmpty()) {
1677         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1678                          _("Select <b>path(s)</b> to simplify."));
1679         return;
1680     }
1681
1682     GSList *items = g_slist_copy((GSList *) selection->itemList());
1683
1684     bool didSomething = sp_selected_path_simplify_items(desktop, selection,
1685                                                         items, threshold,
1686                                                         justCoalesce,
1687                                                         angleLimit,
1688                                                         breakableAngles, true);
1689
1690     if (didSomething)
1691         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_SIMPLIFY,
1692                          _("Simplify"));
1693     else
1694         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1695
1696 }
1697
1698
1699 // globals for keeping track of accelerated simplify
1700 static double previousTime      = 0.0;
1701 static gdouble simplifyMultiply = 1.0;
1702
1703 void
1704 sp_selected_path_simplify(void)
1705 {
1706     gdouble simplifyThreshold =
1707         prefs_get_double_attribute("options.simplifythreshold", "value", 0.003);
1708     bool simplifyJustCoalesce =
1709         (bool) prefs_get_int_attribute("options.simplifyjustcoalesce", "value", 0);
1710
1711     //Get the current time
1712     GTimeVal currentTimeVal;
1713     g_get_current_time(&currentTimeVal);
1714     double currentTime = currentTimeVal.tv_sec * 1000000 +
1715                 currentTimeVal.tv_usec;
1716
1717     //Was the previous call to this function recent? (<0.5 sec)
1718     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1719
1720         // add to the threshold 1/2 of its original value
1721         simplifyMultiply  += 0.5;
1722         simplifyThreshold *= simplifyMultiply;
1723
1724     } else {
1725         // reset to the default
1726         simplifyMultiply = 1;
1727     }
1728
1729     //remember time for next call
1730     previousTime = currentTime;
1731
1732     //g_print("%g\n", simplify_threshold);
1733
1734     //Make the actual call
1735     sp_selected_path_simplify_selection(simplifyThreshold,
1736                       simplifyJustCoalesce, 0.0, false);
1737 }
1738
1739
1740
1741 // fonctions utilitaires
1742
1743 bool
1744 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1745 {
1746     if (who == NULL || a == NULL)
1747         return false;
1748     if (who == a)
1749         return true;
1750     return Ancetre(sp_repr_parent(a), who);
1751 }
1752
1753 Path *
1754 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1755 {
1756     SPCurve *curve = curve_for_item(item);
1757     if (curve == NULL) {
1758         return NULL;
1759     }
1760
1761     Geom::PathVector pathv = pathvector_for_curve(item, curve, doTransformation, transformFull);
1762
1763     Path *dest = new Path;
1764     dest->LoadPathVector(pathv);
1765
1766     curve->unref();
1767
1768     return dest;
1769 }
1770
1771 /*
1772  * This function always returns a new NArtBpath, the caller must g_free the returned path!
1773 */
1774 NArtBpath *
1775 bpath_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull)
1776 {
1777     if (curve == NULL)
1778         return NULL;
1779
1780     NArtBpath const *bpath = SP_CURVE_BPATH(curve);
1781     if (bpath == NULL) {
1782         return NULL;
1783     }
1784
1785     NArtBpath *new_bpath; // we will get a duplicate which has to be freed at some point!
1786     if (doTransformation) {
1787         if (transformFull) {
1788             new_bpath = nr_artpath_affine(bpath, from_2geom(sp_item_i2doc_affine(item)));
1789         } else {
1790             new_bpath = nr_artpath_affine(bpath, item->transform);
1791         }
1792     } else {
1793         new_bpath = nr_artpath_affine(bpath, NR::identity());
1794     }
1795
1796     return new_bpath;
1797 }
1798
1799 /*
1800  * NOTE: Returns empty pathvector if curve == NULL
1801  * TODO: see if calling this method can be optimized. All the pathvector copying might be slow.
1802  */
1803 Geom::PathVector
1804 pathvector_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull)
1805 {
1806     if (curve == NULL)
1807         return Geom::PathVector();
1808
1809     if (doTransformation) {
1810         if (transformFull) {
1811             return (curve->get_pathvector()) * sp_item_i2doc_affine(item);
1812         } else {
1813             return (curve->get_pathvector()) * to_2geom(item->transform);
1814         }
1815     } else {
1816         return curve->get_pathvector();
1817     }
1818 }
1819
1820 SPCurve* curve_for_item(SPItem *item)
1821 {
1822     if (!item)
1823         return NULL;
1824
1825     SPCurve *curve = NULL;
1826
1827     if (SP_IS_SHAPE(item)) {
1828         if (SP_IS_PATH(item)) {
1829             curve = sp_path_get_curve_for_edit(SP_PATH(item));
1830         } else {
1831             curve = sp_shape_get_curve(SP_SHAPE(item));
1832         }
1833     }
1834     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item))
1835     {
1836         curve = te_get_layout(item)->convertToCurves();
1837     }
1838     else if (SP_IS_IMAGE(item))
1839     {
1840         curve = sp_image_get_curve(SP_IMAGE(item));
1841     }
1842
1843     return curve; // do not forget to unref the curve at some point!
1844 }
1845
1846 Path *bpath_to_Path(NArtBpath const *bpath) {
1847     Path *dest = new Path;
1848     dest->SetBackData(false);
1849     {
1850         int   i;
1851         bool  closed = false;
1852         float lastX  = 0.0;
1853         float lastY  = 0.0;
1854
1855         for (i = 0; bpath[i].code != NR_END; i++) {
1856             switch (bpath[i].code) {
1857                 case NR_LINETO:
1858                     lastX = bpath[i].x3;
1859                     lastY = bpath[i].y3;
1860                     {
1861                         NR::Point tmp(lastX, lastY);
1862                         dest->LineTo(tmp);
1863                     }
1864                     break;
1865
1866                 case NR_CURVETO:
1867                 {
1868                     NR::Point tmp, tms, tme;
1869                     tmp[0]=bpath[i].x3;
1870                     tmp[1]=bpath[i].y3;
1871                     tms[0]=3 * (bpath[i].x1 - lastX);
1872                     tms[1]=3 * (bpath[i].y1 - lastY);
1873                     tme[0]=3 * (bpath[i].x3 - bpath[i].x2);
1874                     tme[1]=3 * (bpath[i].y3 - bpath[i].y2);
1875                     dest->CubicTo(tmp,tms,tme);
1876                 }
1877                 lastX = bpath[i].x3;
1878                 lastY = bpath[i].y3;
1879                 break;
1880
1881                 case NR_MOVETO_OPEN:
1882                 case NR_MOVETO:
1883                     if (closed)
1884                         dest->Close();
1885                     closed = (bpath[i].code == NR_MOVETO);
1886                     lastX = bpath[i].x3;
1887                     lastY = bpath[i].y3;
1888                     {
1889                         NR::Point  tmp(lastX, lastY);
1890                         dest->MoveTo(tmp);
1891                     }
1892                     break;
1893                 default:
1894                     break;
1895             }
1896         }
1897         if (closed)
1898             dest->Close();
1899     }
1900     return dest;
1901 }
1902
1903 NR::Maybe<Path::cut_position> get_nearest_position_on_Path(Path *path, NR::Point p, unsigned seg)
1904 {
1905     //get nearest position on path
1906     Path::cut_position pos = path->PointToCurvilignPosition(p, seg);
1907     return pos;
1908 }
1909
1910 NR::Point get_point_on_Path(Path *path, int piece, double t)
1911 {
1912     NR::Point p;
1913     path->PointAt(piece, t, p);
1914     return p;
1915 }
1916
1917
1918 /*
1919   Local Variables:
1920   mode:c++
1921   c-file-style:"stroustrup"
1922   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1923   indent-tabs-mode:nil
1924   fill-column:99
1925   End:
1926 */
1927 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :