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 "document.h"
  37 #include "message-stack.h"
  38 #include "selection.h"
  39 #include "desktop-handles.h"
  40 #include "desktop.h"
  41 #include "display/canvas-bpath.h"
  42 #include "display/curve.h"
  43 #include <glibmm/i18n.h>
  44 #include "preferences.h"
  45
  46 #include "xml/repr.h"
  47 #include "xml/repr-sorting.h"
  48 #include <2geom/pathvector.h>
  49 #include <libnr/nr-scale-matrix-ops.h>
  50 #include "helper/geom.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(SPDesktop *desktop, bool_op bop, const unsigned int verb=SP_VERB_NONE, const Glib::ustring description="");
  60 void sp_selected_path_do_offset(SPDesktop *desktop, bool expand, double prefOffset);
  61 void sp_selected_path_create_offset_object(SPDesktop *desktop, int expand, bool updating);
  62
  63 void
  64 sp_selected_path_union(SPDesktop *desktop)
  65 {
  66     sp_selected_path_boolop(desktop, bool_op_union, SP_VERB_SELECTION_UNION, _("Union"));
  67 }
  68
  69 void
  70 sp_selected_path_union_skip_undo(SPDesktop *desktop)
  71 {
  72     sp_selected_path_boolop(desktop, bool_op_union, SP_VERB_NONE, _("Union"));
  73 }
  74
  75 void
  76 sp_selected_path_intersect(SPDesktop *desktop)
  77 {
  78     sp_selected_path_boolop(desktop, bool_op_inters, SP_VERB_SELECTION_INTERSECT, _("Intersection"));
  79 }
  80
  81 void
  82 sp_selected_path_diff(SPDesktop *desktop)
  83 {
  84     sp_selected_path_boolop(desktop, bool_op_diff, SP_VERB_SELECTION_DIFF, _("Difference"));
  85 }
  86
  87 void
  88 sp_selected_path_diff_skip_undo(SPDesktop *desktop)
  89 {
  90     sp_selected_path_boolop(desktop, bool_op_diff, SP_VERB_NONE, _("Difference"));
  91 }
  92
  93 void
  94 sp_selected_path_symdiff(SPDesktop *desktop)
  95 {
  96     sp_selected_path_boolop(desktop, bool_op_symdiff, SP_VERB_SELECTION_SYMDIFF, _("Exclusion"));
  97 }
  98 void
  99 sp_selected_path_cut(SPDesktop *desktop)
 100 {
 101     sp_selected_path_boolop(desktop, bool_op_cut, SP_VERB_SELECTION_CUT, _("Division"));
 102 }
 103 void
 104 sp_selected_path_slice(SPDesktop *desktop)
 105 {
 106     sp_selected_path_boolop(desktop, bool_op_slice, SP_VERB_SELECTION_SLICE,  _("Cut path"));
 107 }
 108
 109
 110 // boolean operations
 111 // take the source paths from the file, do the operation, delete the originals and add the results
 112 void
 113 sp_selected_path_boolop(SPDesktop *desktop, bool_op bop, const unsigned int verb, const Glib::ustring description)
 114 {
 115     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 116
 117     GSList *il = (GSList *) selection->itemList();
 118
 119     // allow union on a single object for the purpose of removing self overlapse (svn log, revision 13334)
 120     if ( (g_slist_length(il) < 2) && (bop != bool_op_union)) {
 121         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 2 paths</b> to perform a boolean operation."));
 122         return;
 123     }
 124     else if ( g_slist_length(il) < 1 ) {
 125         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 1 path</b> to perform a boolean union."));
 126         return;
 127     }
 128
 129     if (g_slist_length(il) > 2) {
 130         if (bop == bool_op_diff || bop == bool_op_cut || bop == bool_op_slice ) {
 131             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>exactly 2 paths</b> to perform difference, division, or path cut."));
 132             return;
 133         }
 134     }
 135
 136     // reverseOrderForOp marks whether the order of the list is the top->down order
 137     // it's only used when there are 2 objects, and for operations who need to know the
 138     // topmost object (differences, cuts)
 139     bool reverseOrderForOp = false;
 140
 141     if (bop == bool_op_diff || bop == bool_op_cut || bop == bool_op_slice) {
 142         // check in the tree to find which element of the selection list is topmost (for 2-operand commands only)
 143         Inkscape::XML::Node *a = SP_OBJECT_REPR(il->data);
 144         Inkscape::XML::Node *b = SP_OBJECT_REPR(il->next->data);
 145
 146         if (a == NULL || b == NULL) {
 147             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Unable to determine the <b>z-order</b> of the objects selected for difference, XOR, division, or path cut."));
 148             return;
 149         }
 150
 151         if (Ancetre(a, b)) {
 152             // a is the parent of b, already in the proper order
 153         } else if (Ancetre(b, a)) {
 154             // reverse order
 155             reverseOrderForOp = true;
 156         } else {
 157
 158             // objects are not in parent/child relationship;
 159             // find their lowest common ancestor
 160             Inkscape::XML::Node *dad = LCA(a, b);
 161             if (dad == NULL) {
 162                 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."));
 163                 return;
 164             }
 165
 166             // find the children of the LCA that lead from it to the a and b
 167             Inkscape::XML::Node *as = AncetreFils(a, dad);
 168             Inkscape::XML::Node *bs = AncetreFils(b, dad);
 169
 170             // find out which comes first
 171             for (Inkscape::XML::Node *child = dad->firstChild(); child; child = child->next()) {
 172                 if (child == as) {
 173                     /* a first, so reverse. */
 174                     reverseOrderForOp = true;
 175                     break;
 176                 }
 177                 if (child == bs)
 178                     break;
 179             }
 180         }
 181     }
 182
 183     il = g_slist_copy(il);
 184
 185     // first check if all the input objects have shapes
 186     // otherwise bail out
 187     for (GSList *l = il; l != NULL; l = l->next)
 188     {
 189         SPItem *item = SP_ITEM(l->data);
 190         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item) && !SP_IS_FLOWTEXT(item))
 191         {
 192             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("One of the objects is <b>not a path</b>, cannot perform boolean operation."));
 193             g_slist_free(il);
 194             return;
 195         }
 196     }
 197
 198     // extract the livarot Paths from the source objects
 199     // also get the winding rule specified in the style
 200     int nbOriginaux = g_slist_length(il);
 201     std::vector<Path *> originaux(nbOriginaux);
 202     std::vector<FillRule> origWind(nbOriginaux);
 203     int curOrig;
 204     {
 205         curOrig = 0;
 206         for (GSList *l = il; l != NULL; l = l->next)
 207         {
 208             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(il->data), "style");
 209             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 210             if (val && strcmp(val, "nonzero") == 0) {
 211                 origWind[curOrig]= fill_nonZero;
 212             } else if (val && strcmp(val, "evenodd") == 0) {
 213                 origWind[curOrig]= fill_oddEven;
 214             } else {
 215                 origWind[curOrig]= fill_nonZero;
 216             }
 217
 218             originaux[curOrig] = Path_for_item((SPItem *) l->data, true, true);
 219             if (originaux[curOrig] == NULL || originaux[curOrig]->descr_cmd.size() <= 1)
 220             {
 221                 for (int i = curOrig; i >= 0; i--) delete originaux[i];
 222                 g_slist_free(il);
 223                 return;
 224             }
 225             curOrig++;
 226         }
 227     }
 228     // reverse if needed
 229     // note that the selection list keeps its order
 230     if ( reverseOrderForOp ) {
 231         Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 232         FillRule swai=origWind[0]; origWind[0]=origWind[1]; origWind[1]=swai;
 233     }
 234
 235     // and work
 236     // some temporary instances, first
 237     Shape *theShapeA = new Shape;
 238     Shape *theShapeB = new Shape;
 239     Shape *theShape = new Shape;
 240     Path *res = new Path;
 241     res->SetBackData(false);
 242     Path::cut_position  *toCut=NULL;
 243     int                  nbToCut=0;
 244
 245     if ( bop == bool_op_inters || bop == bool_op_union || bop == bool_op_diff || bop == bool_op_symdiff ) {
 246         // true boolean op
 247         // get the polygons of each path, with the winding rule specified, and apply the operation iteratively
 248         originaux[0]->ConvertWithBackData(0.1);
 249
 250         originaux[0]->Fill(theShape, 0);
 251
 252         theShapeA->ConvertToShape(theShape, origWind[0]);
 253
 254         curOrig = 1;
 255         for (GSList *l = il->next; l != NULL; l = l->next) {
 256             originaux[curOrig]->ConvertWithBackData(0.1);
 257
 258             originaux[curOrig]->Fill(theShape, curOrig);
 259
 260             theShapeB->ConvertToShape(theShape, origWind[curOrig]);
 261
 262             // les elements arrivent en ordre inverse dans la liste
 263             theShape->Booleen(theShapeB, theShapeA, bop);
 264
 265             {
 266                 Shape *swap = theShape;
 267                 theShape = theShapeA;
 268                 theShapeA = swap;
 269             }
 270             curOrig++;
 271         }
 272
 273         {
 274             Shape *swap = theShape;
 275             theShape = theShapeA;
 276             theShapeA = swap;
 277         }
 278
 279     } else if ( bop == bool_op_cut ) {
 280         // cuts= sort of a bastard boolean operation, thus not the axact same modus operandi
 281         // technically, the cut path is not necessarily a polygon (thus has no winding rule)
 282         // it is just uncrossed, and cleaned from duplicate edges and points
 283         // then it's fed to Booleen() which will uncross it against the other path
 284         // then comes the trick: each edge of the cut path is duplicated (one in each direction),
 285         // thus making a polygon. the weight of the edges of the cut are all 0, but
 286         // the Booleen need to invert the ones inside the source polygon (for the subsequent
 287         // ConvertToForme)
 288
 289         // the cut path needs to have the highest pathID in the back data
 290         // that's how the Booleen() function knows it's an edge of the cut
 291
 292         // FIXME: this gives poor results, the final paths are full of extraneous nodes. Decreasing
 293         // ConvertWithBackData parameter below simply increases the number of nodes, so for now I
 294         // left it at 1.0. Investigate replacing this by a combination of difference and
 295         // intersection of the same two paths. -- bb
 296         {
 297             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 298             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 299         }
 300         originaux[0]->ConvertWithBackData(1.0);
 301
 302         originaux[0]->Fill(theShape, 0);
 303
 304         theShapeA->ConvertToShape(theShape, origWind[0]);
 305
 306         originaux[1]->ConvertWithBackData(1.0);
 307
 308         originaux[1]->Fill(theShape, 1,false,false,false); //do not closeIfNeeded
 309
 310         theShapeB->ConvertToShape(theShape, fill_justDont); // fill_justDont doesn't computes winding numbers
 311
 312         // les elements arrivent en ordre inverse dans la liste
 313         theShape->Booleen(theShapeB, theShapeA, bool_op_cut, 1);
 314
 315     } else if ( bop == bool_op_slice ) {
 316         // slice is not really a boolean operation
 317         // you just put the 2 shapes in a single polygon, uncross it
 318         // the points where the degree is > 2 are intersections
 319         // just check it's an intersection on the path you want to cut, and keep it
 320         // the intersections you have found are then fed to ConvertPositionsToMoveTo() which will
 321         // make new subpath at each one of these positions
 322         // inversion pour l'op\8eration
 323         {
 324             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 325             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 326         }
 327         originaux[0]->ConvertWithBackData(1.0);
 328
 329         originaux[0]->Fill(theShapeA, 0,false,false,false); // don't closeIfNeeded
 330
 331         originaux[1]->ConvertWithBackData(1.0);
 332
 333         originaux[1]->Fill(theShapeA, 1,true,false,false);// don't closeIfNeeded and just dump in the shape, don't reset it
 334
 335         theShape->ConvertToShape(theShapeA, fill_justDont);
 336
 337         if ( theShape->hasBackData() ) {
 338             // should always be the case, but ya never know
 339             {
 340                 for (int i = 0; i < theShape->numberOfPoints(); i++) {
 341                     if ( theShape->getPoint(i).totalDegree() > 2 ) {
 342                         // possibly an intersection
 343                         // we need to check that at least one edge from the source path is incident to it
 344                         // before we declare it's an intersection
 345                         int cb = theShape->getPoint(i).incidentEdge[FIRST];
 346                         int   nbOrig=0;
 347                         int   nbOther=0;
 348                         int   piece=-1;
 349                         float t=0.0;
 350                         while ( cb >= 0 && cb < theShape->numberOfEdges() ) {
 351                             if ( theShape->ebData[cb].pathID == 0 ) {
 352                                 // the source has an edge incident to the point, get its position on the path
 353                                 piece=theShape->ebData[cb].pieceID;
 354                                 if ( theShape->getEdge(cb).st == i ) {
 355                                     t=theShape->ebData[cb].tSt;
 356                                 } else {
 357                                     t=theShape->ebData[cb].tEn;
 358                                 }
 359                                 nbOrig++;
 360                             }
 361                             if ( theShape->ebData[cb].pathID == 1 ) nbOther++; // the cut is incident to this point
 362                             cb=theShape->NextAt(i, cb);
 363                         }
 364                         if ( nbOrig > 0 && nbOther > 0 ) {
 365                             // point incident to both path and cut: an intersection
 366                             // note that you only keep one position on the source; you could have degenerate
 367                             // cases where the source crosses itself at this point, and you wouyld miss an intersection
 368                             toCut=(Path::cut_position*)realloc(toCut, (nbToCut+1)*sizeof(Path::cut_position));
 369                             toCut[nbToCut].piece=piece;
 370                             toCut[nbToCut].t=t;
 371                             nbToCut++;
 372                         }
 373                     }
 374                 }
 375             }
 376             {
 377                 // i think it's useless now
 378                 int i = theShape->numberOfEdges() - 1;
 379                 for (;i>=0;i--) {
 380                     if ( theShape->ebData[i].pathID == 1 ) {
 381                         theShape->SubEdge(i);
 382                     }
 383                 }
 384             }
 385
 386         }
 387     }
 388
 389     int*    nesting=NULL;
 390     int*    conts=NULL;
 391     int     nbNest=0;
 392     // pour compenser le swap juste avant
 393     if ( bop == bool_op_slice ) {
 394 //    theShape->ConvertToForme(res, nbOriginaux, originaux, true);
 395 //    res->ConvertForcedToMoveTo();
 396         res->Copy(originaux[0]);
 397         res->ConvertPositionsToMoveTo(nbToCut, toCut); // cut where you found intersections
 398         free(toCut);
 399     } else if ( bop == bool_op_cut ) {
 400         // il faut appeler pour desallouer PointData (pas vital, mais bon)
 401         // the Booleen() function did not deallocated the point_data array in theShape, because this
 402         // function needs it.
 403         // this function uses the point_data to get the winding number of each path (ie: is a hole or not)
 404         // for later reconstruction in objects, you also need to extract which path is parent of holes (nesting info)
 405         theShape->ConvertToFormeNested(res, nbOriginaux, &originaux[0], 1, nbNest, nesting, conts);
 406     } else {
 407         theShape->ConvertToForme(res, nbOriginaux, &originaux[0]);
 408     }
 409
 410     delete theShape;
 411     delete theShapeA;
 412     delete theShapeB;
 413     for (int i = 0; i < nbOriginaux; i++)  delete originaux[i];
 414
 415     if (res->descr_cmd.size() <= 1)
 416     {
 417         // only one command, presumably a moveto: it isn't a path
 418         for (GSList *l = il; l != NULL; l = l->next)
 419         {
 420             SP_OBJECT(l->data)->deleteObject();
 421         }
 422         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 423                          description);
 424         selection->clear();
 425
 426         delete res;
 427         g_slist_free(il);
 428         return;
 429     }
 430
 431     // get the source path object
 432     SPObject *source;
 433     if ( bop == bool_op_diff || bop == bool_op_cut || bop == bool_op_slice ) {
 434         if (reverseOrderForOp) {
 435              source = SP_OBJECT(il->data);
 436         } else {
 437              source = SP_OBJECT(il->next->data);
 438         }
 439     } else {
 440         // find out the bottom object
 441         GSList *sorted = g_slist_copy((GSList *) selection->reprList());
 442
 443         sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
 444
 445         source = sp_desktop_document(desktop)->
 446             getObjectByRepr((Inkscape::XML::Node *)sorted->data);
 447
 448         g_slist_free(sorted);
 449     }
 450
 451     // adjust style properties that depend on a possible transform in the source object in order
 452     // to get a correct style attribute for the new path
 453     SPItem* item_source = SP_ITEM(source);
 454     Geom::Matrix i2doc(sp_item_i2doc_affine(item_source));
 455     sp_item_adjust_stroke(item_source, i2doc.descrim());
 456     sp_item_adjust_pattern(item_source, i2doc);
 457     sp_item_adjust_gradient(item_source, i2doc);
 458     sp_item_adjust_livepatheffect(item_source, i2doc);
 459
 460     Inkscape::XML::Node *repr_source = SP_OBJECT_REPR(source);
 461
 462     // remember important aspects of the source path, to be restored
 463     gint pos = repr_source->position();
 464     Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
 465     gchar const *id = repr_source->attribute("id");
 466     gchar const *style = repr_source->attribute("style");
 467     gchar const *mask = repr_source->attribute("mask");
 468     gchar const *clip_path = repr_source->attribute("clip-path");
 469     gchar *title = source->title();
 470     gchar *desc = source->desc();
 471     // remove source paths
 472     selection->clear();
 473     for (GSList *l = il; l != NULL; l = l->next) {
 474         // if this is the bottommost object,
 475         if (!strcmp(SP_OBJECT_REPR(l->data)->attribute("id"), id)) {
 476             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 477             SP_OBJECT(l->data)->deleteObject(false);
 478         } else {
 479             // delete the object for real, so that its clones can take appropriate action
 480             SP_OBJECT(l->data)->deleteObject();
 481         }
 482     }
 483     g_slist_free(il);
 484
 485     // premultiply by the inverse of parent's repr
 486     SPItem *parent_item = SP_ITEM(sp_desktop_document(desktop)->getObjectByRepr(parent));
 487     Geom::Matrix local (sp_item_i2doc_affine(parent_item));
 488     gchar *transform = sp_svg_transform_write(local.inverse());
 489
 490     // now that we have the result, add it on the canvas
 491     if ( bop == bool_op_cut || bop == bool_op_slice ) {
 492         int    nbRP=0;
 493         Path** resPath;
 494         if ( bop == bool_op_slice ) {
 495             // there are moveto's at each intersection, but it's still one unique path
 496             // so break it down and add each subpath independently
 497             // we could call break_apart to do this, but while we have the description...
 498             resPath=res->SubPaths(nbRP, false);
 499         } else {
 500             // cut operation is a bit wicked: you need to keep holes
 501             // that's why you needed the nesting
 502             // ConvertToFormeNested() dumped all the subpath in a single Path "res", so we need
 503             // to get the path for each part of the polygon. that's why you need the nesting info:
 504             // to know in wich subpath to add a subpath
 505             resPath=res->SubPathsWithNesting(nbRP, true, nbNest, nesting, conts);
 506
 507             // cleaning
 508             if ( conts ) free(conts);
 509             if ( nesting ) free(nesting);
 510         }
 511
 512         // add all the pieces resulting from cut or slice
 513         for (int i=0;i<nbRP;i++) {
 514             gchar *d = resPath[i]->svg_dump_path();
 515
 516             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 517             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 518             repr->setAttribute("style", style);
 519             if (mask)
 520                 repr->setAttribute("mask", mask);
 521             if (clip_path)
 522                 repr->setAttribute("clip-path", clip_path);
 523
 524             repr->setAttribute("d", d);
 525             g_free(d);
 526
 527             // for slice, remove fill
 528             if (bop == bool_op_slice) {
 529                 SPCSSAttr *css;
 530
 531                 css = sp_repr_css_attr_new();
 532                 sp_repr_css_set_property(css, "fill", "none");
 533
 534                 sp_repr_css_change(repr, css, "style");
 535
 536                 sp_repr_css_attr_unref(css);
 537             }
 538
 539             // we assign the same id on all pieces, but it on adding to document, it will be changed on all except one
 540             // this means it's basically random which of the pieces inherits the original's id and clones
 541             // a better algorithm might figure out e.g. the biggest piece
 542             repr->setAttribute("id", id);
 543
 544             repr->setAttribute("transform", transform);
 545
 546             // add the new repr to the parent
 547             parent->appendChild(repr);
 548
 549             // move to the saved position
 550             repr->setPosition(pos > 0 ? pos : 0);
 551
 552             selection->add(repr);
 553             Inkscape::GC::release(repr);
 554
 555             delete resPath[i];
 556         }
 557         if ( resPath ) free(resPath);
 558
 559     } else {
 560         gchar *d = res->svg_dump_path();
 561
 562         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 563         Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 564         repr->setAttribute("style", style);
 565
 566         if ( mask )
 567             repr->setAttribute("mask", mask);
 568
 569         if ( clip_path )
 570             repr->setAttribute("clip-path", clip_path);
 571
 572         repr->setAttribute("d", d);
 573         g_free(d);
 574
 575         repr->setAttribute("transform", transform);
 576
 577         repr->setAttribute("id", id);
 578         parent->appendChild(repr);
 579         if (title) {
 580                 sp_desktop_document(desktop)->getObjectByRepr(repr)->setTitle(title);
 581         }
 582         if (desc) {
 583                 sp_desktop_document(desktop)->getObjectByRepr(repr)->setDesc(desc);
 584         }
 585                 repr->setPosition(pos > 0 ? pos : 0);
 586
 587         selection->add(repr);
 588         Inkscape::GC::release(repr);
 589     }
 590
 591     g_free(transform);
 592     if (title) g_free(title);
 593     if (desc) g_free(desc);
 594
 595     if (verb != SP_VERB_NONE) {
 596         sp_document_done(sp_desktop_document(desktop), verb, description);
 597     }
 598
 599     delete res;
 600 }
 601
 602 static
 603 void sp_selected_path_outline_add_marker( SPObject *marker_object, Geom::Matrix marker_transform,
 604                                           Geom::Scale stroke_scale, Geom::Matrix transform,
 605                                           Inkscape::XML::Node *g_repr, Inkscape::XML::Document *xml_doc, SPDocument * doc )
 606 {
 607     SPMarker* marker = SP_MARKER (marker_object);
 608     SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker_object));
 609
 610     Geom::Matrix tr(marker_transform);
 611
 612     if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
 613         tr = stroke_scale * tr;
 614     }
 615
 616     // total marker transform
 617     tr = marker_item->transform * marker->c2p * tr * transform;
 618
 619     if (SP_OBJECT_REPR(marker_item)) {
 620         Inkscape::XML::Node *m_repr = SP_OBJECT_REPR(marker_item)->duplicate(xml_doc);
 621         g_repr->appendChild(m_repr);
 622         SPItem *marker_item = (SPItem *) doc->getObjectByRepr(m_repr);
 623         sp_item_write_transform(marker_item, m_repr, tr);
 624     }
 625 }
 626
 627 void
 628 sp_selected_path_outline(SPDesktop *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         if (!SP_OBJECT_STYLE(item) || SP_OBJECT_STYLE(item)->stroke.noneSet) {
 662             curve->unref();
 663             continue;
 664         }
 665
 666         // remember old stroke style, to be set on fill
 667         SPStyle *i_style = SP_OBJECT_STYLE(item);
 668         SPCSSAttr *ncss;
 669         {
 670             ncss = sp_css_attr_from_style(i_style, SP_STYLE_FLAG_ALWAYS);
 671             gchar const *s_val = sp_repr_css_property(ncss, "stroke", NULL);
 672             gchar const *s_opac = sp_repr_css_property(ncss, "stroke-opacity", NULL);
 673
 674             sp_repr_css_set_property(ncss, "stroke", "none");
 675             sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
 676             sp_repr_css_set_property(ncss, "fill", s_val);
 677             if ( s_opac ) {
 678                 sp_repr_css_set_property(ncss, "fill-opacity", s_opac);
 679             } else {
 680                 sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
 681             }
 682             sp_repr_css_unset_property(ncss, "marker-start");
 683             sp_repr_css_unset_property(ncss, "marker-mid");
 684             sp_repr_css_unset_property(ncss, "marker-end");
 685         }
 686
 687         Geom::Matrix const transform(item->transform);
 688         float const scale = transform.descrim();
 689         gchar const *mask = SP_OBJECT_REPR(item)->attribute("mask");
 690         gchar const *clip_path = SP_OBJECT_REPR(item)->attribute("clip-path");
 691
 692         float o_width, o_miter;
 693         JoinType o_join;
 694         ButtType o_butt;
 695
 696         {
 697             int jointype, captype;
 698
 699             jointype = i_style->stroke_linejoin.computed;
 700             captype = i_style->stroke_linecap.computed;
 701             o_width = i_style->stroke_width.computed;
 702
 703             switch (jointype) {
 704                 case SP_STROKE_LINEJOIN_MITER:
 705                     o_join = join_pointy;
 706                     break;
 707                 case SP_STROKE_LINEJOIN_ROUND:
 708                     o_join = join_round;
 709                     break;
 710                 default:
 711                     o_join = join_straight;
 712                     break;
 713             }
 714
 715             switch (captype) {
 716                 case SP_STROKE_LINECAP_SQUARE:
 717                     o_butt = butt_square;
 718                     break;
 719                 case SP_STROKE_LINECAP_ROUND:
 720                     o_butt = butt_round;
 721                     break;
 722                 default:
 723                     o_butt = butt_straight;
 724                     break;
 725             }
 726
 727             if (o_width < 0.1)
 728                 o_width = 0.1;
 729             o_miter = i_style->stroke_miterlimit.value * o_width;
 730         }
 731
 732         SPCurve *curvetemp = curve_for_item(item);
 733         if (curvetemp == NULL) {
 734             curve->unref();
 735             continue;
 736         }
 737         // Livarots outline of arcs is broken. So convert the path to linear and cubics only, for which the outline is created correctly.
 738         Geom::PathVector pathv = pathv_to_linear_and_cubic_beziers( curvetemp->get_pathvector() );
 739         curvetemp->unref();
 740
 741         Path *orig = new Path;
 742         orig->LoadPathVector(pathv);
 743
 744         Path *res = new Path;
 745         res->SetBackData(false);
 746
 747         if (i_style->stroke_dash.n_dash) {
 748             // For dashed strokes, use Stroke method, because Outline can't do dashes
 749             // However Stroke adds lots of extra nodes _or_ makes the path crooked, so consider this a temporary workaround
 750
 751             orig->ConvertWithBackData(0.1);
 752
 753             orig->DashPolylineFromStyle(i_style, scale, 0);
 754
 755             Shape* theShape = new Shape;
 756             orig->Stroke(theShape, false, 0.5*o_width, o_join, o_butt,
 757                          0.5 * o_miter);
 758             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 759
 760             Shape *theRes = new Shape;
 761
 762             theRes->ConvertToShape(theShape, fill_positive);
 763
 764             Path *originaux[1];
 765             originaux[0] = res;
 766             theRes->ConvertToForme(orig, 1, originaux);
 767
 768             res->Coalesce(5.0);
 769
 770             delete theShape;
 771             delete theRes;
 772
 773         } else {
 774
 775             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 776
 777             orig->Coalesce(0.5 * o_width);
 778
 779             Shape *theShape = new Shape;
 780             Shape *theRes = new Shape;
 781
 782             res->ConvertWithBackData(1.0);
 783             res->Fill(theShape, 0);
 784             theRes->ConvertToShape(theShape, fill_positive);
 785
 786             Path *originaux[1];
 787             originaux[0] = res;
 788             theRes->ConvertToForme(orig, 1, originaux);
 789
 790             delete theShape;
 791             delete theRes;
 792         }
 793
 794         if (orig->descr_cmd.size() <= 1) {
 795             // ca a merd\8e, ou bien le resultat est vide
 796             delete res;
 797             delete orig;
 798             continue;
 799         }
 800
 801         did = true;
 802
 803         // remember the position of the item
 804         gint pos = SP_OBJECT_REPR(item)->position();
 805         // remember parent
 806         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 807         // remember id
 808         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 809         // remember title
 810         gchar *title = item->title();
 811         // remember description
 812         gchar *desc = item->desc();
 813
 814         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
 815
 816             SPDocument * doc = sp_desktop_document(desktop);
 817             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 818             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 819
 820             // restore old style, but set old stroke style on fill
 821             sp_repr_css_change(repr, ncss, "style");
 822
 823             sp_repr_css_attr_unref(ncss);
 824
 825             gchar *str = orig->svg_dump_path();
 826             repr->setAttribute("d", str);
 827             g_free(str);
 828
 829             if (mask)
 830                 repr->setAttribute("mask", mask);
 831             if (clip_path)
 832                 repr->setAttribute("clip-path", clip_path);
 833
 834             if (SP_IS_SHAPE(item) && sp_shape_has_markers (SP_SHAPE(item))) {
 835
 836                 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 837                 Inkscape::XML::Node *g_repr = xml_doc->createElement("svg:g");
 838
 839                 // add the group to the parent
 840                 parent->appendChild(g_repr);
 841                 // move to the saved position
 842                 g_repr->setPosition(pos > 0 ? pos : 0);
 843
 844                 g_repr->appendChild(repr);
 845                 // restore title, description, id, transform
 846                 repr->setAttribute("id", id);
 847                 SPItem *newitem = (SPItem *) doc->getObjectByRepr(repr);
 848                 sp_item_write_transform(newitem, repr, transform);
 849                 if (title) {
 850                         newitem->setTitle(title);
 851                 }
 852                 if (desc) {
 853                         newitem->setDesc(desc);
 854                 }
 855
 856                 SPShape *shape = SP_SHAPE(item);
 857
 858                 Geom::PathVector const & pathv = curve->get_pathvector();
 859                 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
 860                     for (int i = 0; i < 2; i++) {  // SP_MARKER_LOC and SP_MARKER_LOC_START
 861                         if ( SPObject *marker_obj = shape->marker[i] ) {
 862                             Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
 863                             sp_selected_path_outline_add_marker( marker_obj, m,
 864                                                                  Geom::Scale(i_style->stroke_width.computed), transform,
 865                                                                  g_repr, xml_doc, doc );
 866                         }
 867                     }
 868
 869                     for (int i = 0; i < 3; i += 2) {  // SP_MARKER_LOC and SP_MARKER_LOC_MID
 870                         SPObject *midmarker_obj = shape->marker[i];
 871                         if ( midmarker_obj && (path_it->size_default() > 1) ) {
 872                             Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
 873                             Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
 874                             while (curve_it2 != path_it->end_default())
 875                             {
 876                                 /* Put marker between curve_it1 and curve_it2.
 877                                  * Loop to end_default (so including closing segment), because when a path is closed,
 878                                  * there should be a midpoint marker between last segment and closing straight line segment
 879                                  */
 880                                 Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
 881                                 sp_selected_path_outline_add_marker(midmarker_obj, m,
 882                                                                     Geom::Scale(i_style->stroke_width.computed), transform,
 883                                                                     g_repr, xml_doc, doc);
 884
 885                                 ++curve_it1;
 886                                 ++curve_it2;
 887                             }
 888                         }
 889                     }
 890
 891                     for (int i = 0; i < 4; i += 3) {  // SP_MARKER_LOC and SP_MARKER_LOC_END
 892                         if ( SPObject *marker_obj = shape->marker[i] ) {
 893                             /* Get reference to last curve in the path.
 894                              * For moveto-only path, this returns the "closing line segment". */
 895                             unsigned int index = path_it->size_default();
 896                             if (index > 0) {
 897                                 index--;
 898                             }
 899                             Geom::Curve const &lastcurve = (*path_it)[index];
 900
 901                             Geom::Matrix const m = sp_shape_marker_get_transform_at_end(lastcurve);
 902                             sp_selected_path_outline_add_marker( marker_obj, m,
 903                                                                  Geom::Scale(i_style->stroke_width.computed), transform,
 904                                                                  g_repr, xml_doc, doc );
 905                         }
 906                     }
 907                 }
 908
 909                 selection->add(g_repr);
 910
 911                 Inkscape::GC::release(g_repr);
 912
 913
 914             } else {
 915
 916                 // add the new repr to the parent
 917                 parent->appendChild(repr);
 918
 919                 // move to the saved position
 920                 repr->setPosition(pos > 0 ? pos : 0);
 921
 922                 // restore title, description, id, transform
 923                 repr->setAttribute("id", id);
 924
 925                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 926                 sp_item_write_transform(newitem, repr, transform);
 927                 if (title) {
 928                         newitem->setTitle(title);
 929                 }
 930                 if (desc) {
 931                         newitem->setDesc(desc);
 932                 }
 933
 934                 selection->add(repr);
 935
 936             }
 937
 938             Inkscape::GC::release(repr);
 939
 940             curve->unref();
 941             selection->remove(item);
 942             SP_OBJECT(item)->deleteObject(false);
 943
 944         }
 945         if (title) g_free(title);
 946         if (desc) g_free(desc);
 947
 948         delete res;
 949         delete orig;
 950     }
 951
 952     if (did) {
 953         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_OUTLINE,
 954                          _("Convert stroke to path"));
 955     } else {
 956         // TRANSLATORS: "to outline" means "to convert stroke to path"
 957         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> in the selection."));
 958         return;
 959     }
 960 }
 961
 962
 963 void
 964 sp_selected_path_offset(SPDesktop *desktop)
 965 {
 966     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 967     double prefOffset = prefs->getDouble("/options/defaultoffsetwidth/value", 1.0);
 968
 969     sp_selected_path_do_offset(desktop, true, prefOffset);
 970 }
 971 void
 972 sp_selected_path_inset(SPDesktop *desktop)
 973 {
 974     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 975     double prefOffset = prefs->getDouble("/options/defaultoffsetwidth/value", 1.0);
 976
 977     sp_selected_path_do_offset(desktop, false, prefOffset);
 978 }
 979
 980 void
 981 sp_selected_path_offset_screen(SPDesktop *desktop, double pixels)
 982 {
 983     sp_selected_path_do_offset(desktop, true,  pixels / desktop->current_zoom());
 984 }
 985
 986 void
 987 sp_selected_path_inset_screen(SPDesktop *desktop, double pixels)
 988 {
 989     sp_selected_path_do_offset(desktop, false,  pixels / desktop->current_zoom());
 990 }
 991
 992
 993 void sp_selected_path_create_offset_object_zero(SPDesktop *desktop)
 994 {
 995     sp_selected_path_create_offset_object(desktop, 0, false);
 996 }
 997
 998 void sp_selected_path_create_offset(SPDesktop *desktop)
 999 {
1000     sp_selected_path_create_offset_object(desktop, 1, false);
1001 }
1002 void sp_selected_path_create_inset(SPDesktop *desktop)
1003 {
1004     sp_selected_path_create_offset_object(desktop, -1, false);
1005 }
1006
1007 void sp_selected_path_create_updating_offset_object_zero(SPDesktop *desktop)
1008 {
1009     sp_selected_path_create_offset_object(desktop, 0, true);
1010 }
1011
1012 void sp_selected_path_create_updating_offset(SPDesktop *desktop)
1013 {
1014     sp_selected_path_create_offset_object(desktop, 1, true);
1015 }
1016 void sp_selected_path_create_updating_inset(SPDesktop *desktop)
1017 {
1018     sp_selected_path_create_offset_object(desktop, -1, true);
1019 }
1020
1021 void
1022 sp_selected_path_create_offset_object(SPDesktop *desktop, int expand, bool updating)
1023 {
1024     Inkscape::Selection *selection;
1025     Inkscape::XML::Node *repr;
1026     SPItem *item;
1027     SPCurve *curve;
1028     gchar *style, *str;
1029     float o_width, o_miter;
1030     JoinType o_join;
1031     ButtType o_butt;
1032
1033     curve = NULL;
1034
1035     selection = sp_desktop_selection(desktop);
1036
1037     item = selection->singleItem();
1038
1039     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
1040         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
1041         return;
1042     }
1043     if (SP_IS_SHAPE(item))
1044     {
1045         curve = sp_shape_get_curve(SP_SHAPE(item));
1046         if (curve == NULL)
1047             return;
1048     }
1049     if (SP_IS_TEXT(item))
1050     {
1051         curve = SP_TEXT(item)->getNormalizedBpath();
1052         if (curve == NULL)
1053             return;
1054     }
1055
1056     Geom::Matrix const transform(item->transform);
1057
1058     sp_item_write_transform(item, SP_OBJECT_REPR(item), Geom::identity());
1059
1060     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
1061
1062     // remember the position of the item
1063     gint pos = SP_OBJECT_REPR(item)->position();
1064     // remember parent
1065     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1066
1067     {
1068         SPStyle *i_style = SP_OBJECT(item)->style;
1069         int jointype, captype;
1070
1071         jointype = i_style->stroke_linejoin.value;
1072         captype = i_style->stroke_linecap.value;
1073         o_width = i_style->stroke_width.computed;
1074         if (jointype == SP_STROKE_LINEJOIN_MITER)
1075         {
1076             o_join = join_pointy;
1077         }
1078         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
1079         {
1080             o_join = join_round;
1081         }
1082         else
1083         {
1084             o_join = join_straight;
1085         }
1086         if (captype == SP_STROKE_LINECAP_SQUARE)
1087         {
1088             o_butt = butt_square;
1089         }
1090         else if (captype == SP_STROKE_LINECAP_ROUND)
1091         {
1092             o_butt = butt_round;
1093         }
1094         else
1095         {
1096             o_butt = butt_straight;
1097         }
1098
1099         {
1100             Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1101             o_width = prefs->getDouble("/options/defaultoffsetwidth/value", 1.0);
1102         }
1103
1104         if (o_width < 0.01)
1105             o_width = 0.01;
1106         o_miter = i_style->stroke_miterlimit.value * o_width;
1107     }
1108
1109     Path *orig = Path_for_item(item, true, false);
1110     if (orig == NULL)
1111     {
1112         g_free(style);
1113         curve->unref();
1114         return;
1115     }
1116
1117     Path *res = new Path;
1118     res->SetBackData(false);
1119
1120     {
1121         Shape *theShape = new Shape;
1122         Shape *theRes = new Shape;
1123
1124         orig->ConvertWithBackData(1.0);
1125         orig->Fill(theShape, 0);
1126
1127         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1128         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1129         if (val && strcmp(val, "nonzero") == 0)
1130         {
1131             theRes->ConvertToShape(theShape, fill_nonZero);
1132         }
1133         else if (val && strcmp(val, "evenodd") == 0)
1134         {
1135             theRes->ConvertToShape(theShape, fill_oddEven);
1136         }
1137         else
1138         {
1139             theRes->ConvertToShape(theShape, fill_nonZero);
1140         }
1141
1142         Path *originaux[1];
1143         originaux[0] = orig;
1144         theRes->ConvertToForme(res, 1, originaux);
1145
1146         delete theShape;
1147         delete theRes;
1148     }
1149
1150     curve->unref();
1151
1152     if (res->descr_cmd.size() <= 1)
1153     {
1154         // pas vraiment de points sur le resultat
1155         // donc il ne reste rien
1156         sp_document_done(sp_desktop_document(desktop),
1157                          (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1158                           : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1159                          (updating ? _("Create linked offset")
1160                           : _("Create dynamic offset")));
1161         selection->clear();
1162
1163         delete res;
1164         delete orig;
1165         g_free(style);
1166         return;
1167     }
1168
1169     {
1170         gchar tstr[80];
1171
1172         tstr[79] = '\0';
1173
1174         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1175         repr = xml_doc->createElement("svg:path");
1176         repr->setAttribute("sodipodi:type", "inkscape:offset");
1177         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1178                                                           ? o_width
1179                                                           : expand < 0
1180                                                           ? -o_width
1181                                                           : 0 ));
1182
1183         str = res->svg_dump_path();
1184         repr->setAttribute("inkscape:original", str);
1185         g_free(str);
1186
1187         if ( updating ) {
1188             char const *id = SP_OBJECT(item)->repr->attribute("id");
1189             char const *uri = g_strdup_printf("#%s", id);
1190             repr->setAttribute("xlink:href", uri);
1191             g_free((void *) uri);
1192         } else {
1193             repr->setAttribute("inkscape:href", NULL);
1194         }
1195
1196         repr->setAttribute("style", style);
1197
1198         // add the new repr to the parent
1199         parent->appendChild(repr);
1200
1201         // move to the saved position
1202         repr->setPosition(pos > 0 ? pos : 0);
1203
1204         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1205
1206         if ( updating ) {
1207             // on conserve l'original
1208             // we reapply the transform to the original (offset will feel it)
1209             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1210         } else {
1211             // delete original, apply the transform to the offset
1212             SP_OBJECT(item)->deleteObject(false);
1213             sp_item_write_transform(nitem, repr, transform);
1214         }
1215
1216         // The object just created from a temporary repr is only a seed.
1217         // We need to invoke its write which will update its real repr (in particular adding d=)
1218         SP_OBJECT(nitem)->updateRepr();
1219
1220         Inkscape::GC::release(repr);
1221
1222         selection->set(nitem);
1223     }
1224
1225     sp_document_done(sp_desktop_document(desktop),
1226                      (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1227                       : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1228                      (updating ? _("Create linked offset")
1229                       : _("Create dynamic offset")));
1230
1231     delete res;
1232     delete orig;
1233
1234     g_free(style);
1235 }
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248 void
1249 sp_selected_path_do_offset(SPDesktop *desktop, bool expand, double prefOffset)
1250 {
1251     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1252
1253     if (selection->isEmpty()) {
1254         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1255         return;
1256     }
1257
1258     bool did = false;
1259
1260     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1261          items != NULL;
1262          items = items->next) {
1263
1264         SPItem *item = (SPItem *) items->data;
1265
1266         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1267             continue;
1268
1269         SPCurve *curve = NULL;
1270         if (SP_IS_SHAPE(item)) {
1271             curve = sp_shape_get_curve(SP_SHAPE(item));
1272             if (curve == NULL)
1273                 continue;
1274         }
1275         if (SP_IS_TEXT(item)) {
1276             curve = SP_TEXT(item)->getNormalizedBpath();
1277             if (curve == NULL)
1278                 continue;
1279         }
1280
1281         Geom::Matrix const transform(item->transform);
1282
1283         sp_item_write_transform(item, SP_OBJECT_REPR(item), Geom::identity());
1284
1285         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1286
1287         float o_width, o_miter;
1288         JoinType o_join;
1289         ButtType o_butt;
1290
1291         {
1292             SPStyle *i_style = SP_OBJECT(item)->style;
1293             int jointype, captype;
1294
1295             jointype = i_style->stroke_linejoin.value;
1296             captype = i_style->stroke_linecap.value;
1297             o_width = i_style->stroke_width.computed;
1298
1299             switch (jointype) {
1300                 case SP_STROKE_LINEJOIN_MITER:
1301                     o_join = join_pointy;
1302                     break;
1303                 case SP_STROKE_LINEJOIN_ROUND:
1304                     o_join = join_round;
1305                     break;
1306                 default:
1307                     o_join = join_straight;
1308                     break;
1309             }
1310
1311             switch (captype) {
1312                 case SP_STROKE_LINECAP_SQUARE:
1313                     o_butt = butt_square;
1314                     break;
1315                 case SP_STROKE_LINECAP_ROUND:
1316                     o_butt = butt_round;
1317                     break;
1318                 default:
1319                     o_butt = butt_straight;
1320                     break;
1321             }
1322
1323             o_width = prefOffset;
1324
1325             if (o_width < 0.1)
1326                 o_width = 0.1;
1327             o_miter = i_style->stroke_miterlimit.value * o_width;
1328         }
1329
1330         Path *orig = Path_for_item(item, false);
1331         if (orig == NULL) {
1332             g_free(style);
1333             curve->unref();
1334             continue;
1335         }
1336
1337         Path *res = new Path;
1338         res->SetBackData(false);
1339
1340         {
1341             Shape *theShape = new Shape;
1342             Shape *theRes = new Shape;
1343
1344             orig->ConvertWithBackData(0.03);
1345             orig->Fill(theShape, 0);
1346
1347             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1348             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1349             if (val && strcmp(val, "nonzero") == 0)
1350             {
1351                 theRes->ConvertToShape(theShape, fill_nonZero);
1352             }
1353             else if (val && strcmp(val, "evenodd") == 0)
1354             {
1355                 theRes->ConvertToShape(theShape, fill_oddEven);
1356             }
1357             else
1358             {
1359                 theRes->ConvertToShape(theShape, fill_nonZero);
1360             }
1361
1362             // et maintenant: offset
1363             // methode inexacte
1364 /*                      Path *originaux[1];
1365                         originaux[0] = orig;
1366                         theRes->ConvertToForme(res, 1, originaux);
1367
1368                         if (expand) {
1369                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1370                         } else {
1371                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1372                         }
1373
1374                         orig->ConvertWithBackData(1.0);
1375                         orig->Fill(theShape, 0);
1376                         theRes->ConvertToShape(theShape, fill_positive);
1377                         originaux[0] = orig;
1378                         theRes->ConvertToForme(res, 1, originaux);
1379
1380                         if (o_width >= 0.5) {
1381                         //     res->Coalesce(1.0);
1382                         res->ConvertEvenLines(1.0);
1383                         res->Simplify(1.0);
1384                         } else {
1385                         //      res->Coalesce(o_width);
1386                         res->ConvertEvenLines(1.0*o_width);
1387                         res->Simplify(1.0 * o_width);
1388                         }    */
1389             // methode par makeoffset
1390
1391             if (expand)
1392             {
1393                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1394             }
1395             else
1396             {
1397                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1398             }
1399             theRes->ConvertToShape(theShape, fill_positive);
1400
1401             res->Reset();
1402             theRes->ConvertToForme(res);
1403
1404             if (o_width >= 1.0)
1405             {
1406                 res->ConvertEvenLines(1.0);
1407                 res->Simplify(1.0);
1408             }
1409             else
1410             {
1411                 res->ConvertEvenLines(1.0*o_width);
1412                 res->Simplify(1.0 * o_width);
1413             }
1414
1415             delete theShape;
1416             delete theRes;
1417         }
1418
1419         did = true;
1420
1421         curve->unref();
1422         // remember the position of the item
1423         gint pos = SP_OBJECT_REPR(item)->position();
1424         // remember parent
1425         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1426         // remember id
1427         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1428
1429         selection->remove(item);
1430         SP_OBJECT(item)->deleteObject(false);
1431
1432         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1433
1434             gchar tstr[80];
1435
1436             tstr[79] = '\0';
1437
1438             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1439             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1440
1441             repr->setAttribute("style", style);
1442
1443             gchar *str = res->svg_dump_path();
1444             repr->setAttribute("d", str);
1445             g_free(str);
1446
1447             // add the new repr to the parent
1448             parent->appendChild(repr);
1449
1450             // move to the saved position
1451             repr->setPosition(pos > 0 ? pos : 0);
1452
1453             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1454
1455             // reapply the transform
1456             sp_item_write_transform(newitem, repr, transform);
1457
1458             repr->setAttribute("id", id);
1459
1460             selection->add(repr);
1461
1462             Inkscape::GC::release(repr);
1463         }
1464
1465         delete orig;
1466         delete res;
1467     }
1468
1469     if (did) {
1470         sp_document_done(sp_desktop_document(desktop),
1471                          (expand ? SP_VERB_SELECTION_OFFSET : SP_VERB_SELECTION_INSET),
1472                          (expand ? _("Outset path") : _("Inset path")));
1473     } else {
1474         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1475         return;
1476     }
1477 }
1478
1479
1480 static bool
1481 sp_selected_path_simplify_items(SPDesktop *desktop,
1482                                 Inkscape::Selection *selection, GSList *items,
1483                                 float threshold,  bool justCoalesce,
1484                                 float angleLimit, bool breakableAngles,
1485                                 bool modifySelection);
1486
1487
1488 //return true if we changed something, else false
1489 bool
1490 sp_selected_path_simplify_item(SPDesktop *desktop,
1491                  Inkscape::Selection *selection, SPItem *item,
1492                  float threshold,  bool justCoalesce,
1493                  float angleLimit, bool breakableAngles,
1494                  gdouble size,     bool modifySelection)
1495 {
1496     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1497         return false;
1498
1499     //If this is a group, do the children instead
1500     if (SP_IS_GROUP(item)) {
1501         GSList *items = sp_item_group_item_list(SP_GROUP(item));
1502
1503         return sp_selected_path_simplify_items(desktop, selection, items,
1504                                                threshold, justCoalesce,
1505                                                angleLimit, breakableAngles,
1506                                                false);
1507     }
1508
1509
1510     SPCurve *curve = NULL;
1511
1512     if (SP_IS_SHAPE(item)) {
1513         curve = sp_shape_get_curve(SP_SHAPE(item));
1514         if (!curve)
1515             return false;
1516     }
1517
1518     if (SP_IS_TEXT(item)) {
1519         curve = SP_TEXT(item)->getNormalizedBpath();
1520         if (!curve)
1521             return false;
1522     }
1523
1524     // correct virtual size by full transform (bug #166937)
1525     size /= sp_item_i2doc_affine(item).descrim();
1526
1527     // save the transform, to re-apply it after simplification
1528     Geom::Matrix const transform(item->transform);
1529
1530     /*
1531        reset the transform, effectively transforming the item by transform.inverse();
1532        this is necessary so that the item is transformed twice back and forth,
1533        allowing all compensations to cancel out regardless of the preferences
1534     */
1535     sp_item_write_transform(item, SP_OBJECT_REPR(item), Geom::identity());
1536
1537     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1538     gchar *mask = g_strdup(SP_OBJECT_REPR(item)->attribute("mask"));
1539     gchar *clip_path = g_strdup(SP_OBJECT_REPR(item)->attribute("clip-path"));
1540
1541     Path *orig = Path_for_item(item, false);
1542     if (orig == NULL) {
1543         g_free(style);
1544         curve->unref();
1545         return false;
1546     }
1547
1548     curve->unref();
1549     // remember the position of the item
1550     gint pos = SP_OBJECT_REPR(item)->position();
1551     // remember parent
1552     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1553     // remember id
1554     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1555     // remember path effect
1556     char const *patheffect = SP_OBJECT_REPR(item)->attribute("inkscape:path-effect");
1557     // remember title
1558     gchar *title = item->title();
1559     // remember description
1560     gchar *desc = item->desc();
1561
1562     //If a group was selected, to not change the selection list
1563     if (modifySelection)
1564         selection->remove(item);
1565
1566     SP_OBJECT(item)->deleteObject(false);
1567
1568     if ( justCoalesce ) {
1569         orig->Coalesce(threshold * size);
1570     } else {
1571         orig->ConvertEvenLines(threshold * size);
1572         orig->Simplify(threshold * size);
1573     }
1574
1575     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1576     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1577
1578     // restore style, mask and clip-path
1579     repr->setAttribute("style", style);
1580     g_free(style);
1581
1582     if ( mask ) {
1583         repr->setAttribute("mask", mask);
1584         g_free(mask);
1585     }
1586
1587     if ( clip_path ) {
1588         repr->setAttribute("clip-path", clip_path);
1589         g_free(clip_path);
1590     }
1591
1592     // path
1593     gchar *str = orig->svg_dump_path();
1594     if (patheffect)
1595         repr->setAttribute("inkscape:original-d", str);
1596     else
1597         repr->setAttribute("d", str);
1598     g_free(str);
1599
1600     // restore id
1601     repr->setAttribute("id", id);
1602
1603     // add the new repr to the parent
1604     parent->appendChild(repr);
1605
1606     // move to the saved position
1607     repr->setPosition(pos > 0 ? pos : 0);
1608
1609     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1610
1611     // reapply the transform
1612     sp_item_write_transform(newitem, repr, transform);
1613
1614     // restore path effect
1615     repr->setAttribute("inkscape:path-effect", patheffect);
1616
1617     // restore title & description
1618     if (title) {
1619         newitem->setTitle(title);
1620         g_free(title);
1621     }
1622     if (desc) {
1623         newitem->setDesc(desc);
1624         g_free(desc);
1625     }
1626
1627     //If we are not in a selected group
1628     if (modifySelection)
1629         selection->add(repr);
1630
1631     Inkscape::GC::release(repr);
1632
1633     // clean up
1634     if (orig) delete orig;
1635
1636     return true;
1637 }
1638
1639
1640 bool
1641 sp_selected_path_simplify_items(SPDesktop *desktop,
1642                                 Inkscape::Selection *selection, GSList *items,
1643                                 float threshold,  bool justCoalesce,
1644                                 float angleLimit, bool breakableAngles,
1645                                 bool modifySelection)
1646 {
1647     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1648     bool simplifyIndividualPaths = prefs->getBool("/options/simplifyindividualpaths/value");
1649
1650     gchar *simplificationType;
1651     if (simplifyIndividualPaths) {
1652         simplificationType = _("Simplifying paths (separately):");
1653     } else {
1654         simplificationType = _("Simplifying paths:");
1655     }
1656
1657     bool didSomething = false;
1658
1659     Geom::OptRect selectionBbox = selection->bounds();
1660     if (!selectionBbox) {
1661         return false;
1662     }
1663     gdouble selectionSize  = L2(selectionBbox->dimensions());
1664
1665     gdouble simplifySize  = selectionSize;
1666
1667     int pathsSimplified = 0;
1668     int totalPathCount  = g_slist_length(items);
1669
1670     // set "busy" cursor
1671     desktop->setWaitingCursor();
1672
1673     for (; items != NULL; items = items->next) {
1674         SPItem *item = (SPItem *) items->data;
1675
1676         if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1677           continue;
1678
1679         if (simplifyIndividualPaths) {
1680             Geom::OptRect itemBbox = item->getBounds(sp_item_i2d_affine(item));
1681             if (itemBbox) {
1682                 simplifySize      = L2(itemBbox->dimensions());
1683             } else {
1684                 simplifySize      = 0;
1685             }
1686         }
1687
1688         pathsSimplified++;
1689
1690         if (pathsSimplified % 20 == 0) {
1691             gchar *message = g_strdup_printf(_("%s <b>%d</b> of <b>%d</b> paths simplified..."),
1692                 simplificationType, pathsSimplified, totalPathCount);
1693             desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, message);
1694         }
1695
1696         didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1697             threshold, justCoalesce, angleLimit, breakableAngles, simplifySize, modifySelection);
1698     }
1699
1700     desktop->clearWaitingCursor();
1701
1702     if (pathsSimplified > 20) {
1703         desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, g_strdup_printf(_("<b>%d</b> paths simplified."), pathsSimplified));
1704     }
1705
1706     return didSomething;
1707 }
1708
1709 void
1710 sp_selected_path_simplify_selection(SPDesktop *desktop, float threshold, bool justCoalesce,
1711                                     float angleLimit, bool breakableAngles)
1712 {
1713     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1714
1715     if (selection->isEmpty()) {
1716         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1717                          _("Select <b>path(s)</b> to simplify."));
1718         return;
1719     }
1720
1721     GSList *items = g_slist_copy((GSList *) selection->itemList());
1722
1723     bool didSomething = sp_selected_path_simplify_items(desktop, selection,
1724                                                         items, threshold,
1725                                                         justCoalesce,
1726                                                         angleLimit,
1727                                                         breakableAngles, true);
1728
1729     if (didSomething)
1730         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_SIMPLIFY,
1731                          _("Simplify"));
1732     else
1733         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1734
1735 }
1736
1737
1738 // globals for keeping track of accelerated simplify
1739 static double previousTime      = 0.0;
1740 static gdouble simplifyMultiply = 1.0;
1741
1742 void
1743 sp_selected_path_simplify(SPDesktop *desktop)
1744 {
1745     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
1746     gdouble simplifyThreshold =
1747         prefs->getDouble("/options/simplifythreshold/value", 0.003);
1748     bool simplifyJustCoalesce = prefs->getBool("/options/simplifyjustcoalesce/value", 0);
1749
1750     //Get the current time
1751     GTimeVal currentTimeVal;
1752     g_get_current_time(&currentTimeVal);
1753     double currentTime = currentTimeVal.tv_sec * 1000000 +
1754                 currentTimeVal.tv_usec;
1755
1756     //Was the previous call to this function recent? (<0.5 sec)
1757     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1758
1759         // add to the threshold 1/2 of its original value
1760         simplifyMultiply  += 0.5;
1761         simplifyThreshold *= simplifyMultiply;
1762
1763     } else {
1764         // reset to the default
1765         simplifyMultiply = 1;
1766     }
1767
1768     //remember time for next call
1769     previousTime = currentTime;
1770
1771     //g_print("%g\n", simplify_threshold);
1772
1773     //Make the actual call
1774     sp_selected_path_simplify_selection(desktop, simplifyThreshold,
1775                                         simplifyJustCoalesce, 0.0, false);
1776 }
1777
1778
1779
1780 // fonctions utilitaires
1781
1782 bool
1783 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1784 {
1785     if (who == NULL || a == NULL)
1786         return false;
1787     if (who == a)
1788         return true;
1789     return Ancetre(sp_repr_parent(a), who);
1790 }
1791
1792 Path *
1793 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1794 {
1795     SPCurve *curve = curve_for_item(item);
1796
1797     if (curve == NULL)
1798         return NULL;
1799
1800     Geom::PathVector *pathv = pathvector_for_curve(item, curve, doTransformation, transformFull, Geom::identity(), Geom::identity());
1801     curve->unref();
1802
1803     Path *dest = new Path;
1804     dest->LoadPathVector(*pathv);
1805     delete pathv;
1806
1807     return dest;
1808 }
1809
1810 /*
1811  * NOTE: Returns empty pathvector if curve == NULL
1812  * TODO: see if calling this method can be optimized. All the pathvector copying might be slow.
1813  */
1814 Geom::PathVector*
1815 pathvector_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull, Geom::Matrix extraPreAffine, Geom::Matrix extraPostAffine)
1816 {
1817     if (curve == NULL)
1818         return NULL;
1819
1820     Geom::PathVector *dest = new Geom::PathVector;
1821     *dest = curve->get_pathvector(); // Make a copy; must be freed by the caller!
1822
1823     if (doTransformation) {
1824         if (transformFull) {
1825             *dest *= extraPreAffine * sp_item_i2doc_affine(item) * extraPostAffine;
1826         } else {
1827             *dest *= extraPreAffine * (Geom::Matrix)item->transform * extraPostAffine;
1828         }
1829     } else {
1830         *dest *= extraPreAffine * extraPostAffine;
1831     }
1832
1833     return dest;
1834 }
1835
1836 SPCurve* curve_for_item(SPItem *item)
1837 {
1838     if (!item)
1839         return NULL;
1840
1841     SPCurve *curve = NULL;
1842     if (SP_IS_SHAPE(item)) {
1843         if (SP_IS_PATH(item)) {
1844             curve = sp_path_get_curve_for_edit(SP_PATH(item));
1845         } else {
1846             curve = sp_shape_get_curve(SP_SHAPE(item));
1847         }
1848     }
1849     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item))
1850     {
1851         curve = te_get_layout(item)->convertToCurves();
1852     }
1853     else if (SP_IS_IMAGE(item))
1854     {
1855     curve = sp_image_get_curve(SP_IMAGE(item));
1856     }
1857
1858     return curve; // do not forget to unref the curve at some point!
1859 }
1860
1861 boost::optional<Path::cut_position> get_nearest_position_on_Path(Path *path, Geom::Point p, unsigned seg)
1862 {
1863     //get nearest position on path
1864     Path::cut_position pos = path->PointToCurvilignPosition(p, seg);
1865     return pos;
1866 }
1867
1868 Geom::Point get_point_on_Path(Path *path, int piece, double t)
1869 {
1870     Geom::Point p;
1871     path->PointAt(piece, t, p);
1872     return p;
1873 }
1874
1875
1876 /*
1877   Local Variables:
1878   mode:c++
1879   c-file-style:"stroustrup"
1880   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1881   indent-tabs-mode:nil
1882   fill-column:99
1883   End:
1884 */
1885 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :