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 "prefs-utils.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_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 131             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>exactly 2 paths</b> to perform difference, XOR, 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     // mettre les elements de la liste dans l'ordre pour ces operations
 142     if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice) {
 143         // check in the tree to find which element of the selection list is topmost (for 2-operand commands only)
 144         Inkscape::XML::Node *a = SP_OBJECT_REPR(il->data);
 145         Inkscape::XML::Node *b = SP_OBJECT_REPR(il->next->data);
 146
 147         if (a == NULL || b == NULL) {
 148             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Unable to determine the <b>z-order</b> of the objects selected for difference, XOR, division, or path cut."));
 149             return;
 150         }
 151
 152         if (Ancetre(a, b)) {
 153             // a is the parent of b, already in the proper order
 154         } else if (Ancetre(b, a)) {
 155             // reverse order
 156             reverseOrderForOp = true;
 157         } else {
 158
 159             // objects are not in parent/child relationship;
 160             // find their lowest common ancestor
 161             Inkscape::XML::Node *dad = LCA(a, b);
 162             if (dad == NULL) {
 163                 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."));
 164                 return;
 165             }
 166
 167             // find the children of the LCA that lead from it to the a and b
 168             Inkscape::XML::Node *as = AncetreFils(a, dad);
 169             Inkscape::XML::Node *bs = AncetreFils(b, dad);
 170
 171             // find out which comes first
 172             for (Inkscape::XML::Node *child = dad->firstChild(); child; child = child->next()) {
 173                 if (child == as) {
 174                     /* a first, so reverse. */
 175                     reverseOrderForOp = true;
 176                     break;
 177                 }
 178                 if (child == bs)
 179                     break;
 180             }
 181         }
 182     }
 183
 184     il = g_slist_copy(il);
 185
 186     // first check if all the input objects have shapes
 187     // otherwise bail out
 188     for (GSList *l = il; l != NULL; l = l->next)
 189     {
 190         SPItem *item = SP_ITEM(l->data);
 191         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item) && !SP_IS_FLOWTEXT(item))
 192         {
 193             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("One of the objects is <b>not a path</b>, cannot perform boolean operation."));
 194             g_slist_free(il);
 195             return;
 196         }
 197     }
 198
 199     // extract the livarot Paths from the source objects
 200     // also get the winding rule specified in the style
 201     int nbOriginaux = g_slist_length(il);
 202     std::vector<Path *> originaux(nbOriginaux);
 203     std::vector<FillRule> origWind(nbOriginaux);
 204     int curOrig;
 205     {
 206         curOrig = 0;
 207         for (GSList *l = il; l != NULL; l = l->next)
 208         {
 209             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(il->data), "style");
 210             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 211             if (val && strcmp(val, "nonzero") == 0) {
 212                 origWind[curOrig]= fill_nonZero;
 213             } else if (val && strcmp(val, "evenodd") == 0) {
 214                 origWind[curOrig]= fill_oddEven;
 215             } else {
 216                 origWind[curOrig]= fill_nonZero;
 217             }
 218
 219             originaux[curOrig] = Path_for_item((SPItem *) l->data, true, true);
 220             if (originaux[curOrig] == NULL || originaux[curOrig]->descr_cmd.size() <= 1)
 221             {
 222                 for (int i = curOrig; i >= 0; i--) delete originaux[i];
 223                 g_slist_free(il);
 224                 return;
 225             }
 226             curOrig++;
 227         }
 228     }
 229     // reverse if needed
 230     // note that the selection list keeps its order
 231     if ( reverseOrderForOp ) {
 232         Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 233         FillRule swai=origWind[0]; origWind[0]=origWind[1]; origWind[1]=swai;
 234     }
 235
 236     // and work
 237     // some temporary instances, first
 238     Shape *theShapeA = new Shape;
 239     Shape *theShapeB = new Shape;
 240     Shape *theShape = new Shape;
 241     Path *res = new Path;
 242     res->SetBackData(false);
 243     Path::cut_position  *toCut=NULL;
 244     int                  nbToCut=0;
 245
 246     if ( bop == bool_op_inters || bop == bool_op_union || bop == bool_op_diff || bop == bool_op_symdiff ) {
 247         // true boolean op
 248         // get the polygons of each path, with the winding rule specified, and apply the operation iteratively
 249         originaux[0]->ConvertWithBackData(0.1);
 250
 251         originaux[0]->Fill(theShape, 0);
 252
 253         theShapeA->ConvertToShape(theShape, origWind[0]);
 254
 255         curOrig = 1;
 256         for (GSList *l = il->next; l != NULL; l = l->next) {
 257             originaux[curOrig]->ConvertWithBackData(0.1);
 258
 259             originaux[curOrig]->Fill(theShape, curOrig);
 260
 261             theShapeB->ConvertToShape(theShape, origWind[curOrig]);
 262
 263             // les elements arrivent en ordre inverse dans la liste
 264             theShape->Booleen(theShapeB, theShapeA, bop);
 265
 266             {
 267                 Shape *swap = theShape;
 268                 theShape = theShapeA;
 269                 theShapeA = swap;
 270             }
 271             curOrig++;
 272         }
 273
 274         {
 275             Shape *swap = theShape;
 276             theShape = theShapeA;
 277             theShapeA = swap;
 278         }
 279
 280     } else if ( bop == bool_op_cut ) {
 281         // cuts= sort of a bastard boolean operation, thus not the axact same modus operandi
 282         // technically, the cut path is not necessarily a polygon (thus has no winding rule)
 283         // it is just uncrossed, and cleaned from duplicate edges and points
 284         // then it's fed to Booleen() which will uncross it against the other path
 285         // then comes the trick: each edge of the cut path is duplicated (one in each direction),
 286         // thus making a polygon. the weight of the edges of the cut are all 0, but
 287         // the Booleen need to invert the ones inside the source polygon (for the subsequent
 288         // ConvertToForme)
 289
 290         // the cut path needs to have the highest pathID in the back data
 291         // that's how the Booleen() function knows it's an edge of the cut
 292
 293         // FIXME: this gives poor results, the final paths are full of extraneous nodes. Decreasing
 294         // ConvertWithBackData parameter below simply increases the number of nodes, so for now I
 295         // left it at 1.0. Investigate replacing this by a combination of difference and
 296         // intersection of the same two paths. -- bb
 297         {
 298             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 299             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 300         }
 301         originaux[0]->ConvertWithBackData(1.0);
 302
 303         originaux[0]->Fill(theShape, 0);
 304
 305         theShapeA->ConvertToShape(theShape, origWind[0]);
 306
 307         originaux[1]->ConvertWithBackData(1.0);
 308
 309         originaux[1]->Fill(theShape, 1,false,false,false); //do not closeIfNeeded
 310
 311         theShapeB->ConvertToShape(theShape, fill_justDont); // fill_justDont doesn't computes winding numbers
 312
 313         // les elements arrivent en ordre inverse dans la liste
 314         theShape->Booleen(theShapeB, theShapeA, bool_op_cut, 1);
 315
 316     } else if ( bop == bool_op_slice ) {
 317         // slice is not really a boolean operation
 318         // you just put the 2 shapes in a single polygon, uncross it
 319         // the points where the degree is > 2 are intersections
 320         // just check it's an intersection on the path you want to cut, and keep it
 321         // the intersections you have found are then fed to ConvertPositionsToMoveTo() which will
 322         // make new subpath at each one of these positions
 323         // inversion pour l'op\8eration
 324         {
 325             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 326             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 327         }
 328         originaux[0]->ConvertWithBackData(1.0);
 329
 330         originaux[0]->Fill(theShapeA, 0,false,false,false); // don't closeIfNeeded
 331
 332         originaux[1]->ConvertWithBackData(1.0);
 333
 334         originaux[1]->Fill(theShapeA, 1,true,false,false);// don't closeIfNeeded and just dump in the shape, don't reset it
 335
 336         theShape->ConvertToShape(theShapeA, fill_justDont);
 337
 338         if ( theShape->hasBackData() ) {
 339             // should always be the case, but ya never know
 340             {
 341                 for (int i = 0; i < theShape->numberOfPoints(); i++) {
 342                     if ( theShape->getPoint(i).totalDegree() > 2 ) {
 343                         // possibly an intersection
 344                         // we need to check that at least one edge from the source path is incident to it
 345                         // before we declare it's an intersection
 346                         int cb = theShape->getPoint(i).incidentEdge[FIRST];
 347                         int   nbOrig=0;
 348                         int   nbOther=0;
 349                         int   piece=-1;
 350                         float t=0.0;
 351                         while ( cb >= 0 && cb < theShape->numberOfEdges() ) {
 352                             if ( theShape->ebData[cb].pathID == 0 ) {
 353                                 // the source has an edge incident to the point, get its position on the path
 354                                 piece=theShape->ebData[cb].pieceID;
 355                                 if ( theShape->getEdge(cb).st == i ) {
 356                                     t=theShape->ebData[cb].tSt;
 357                                 } else {
 358                                     t=theShape->ebData[cb].tEn;
 359                                 }
 360                                 nbOrig++;
 361                             }
 362                             if ( theShape->ebData[cb].pathID == 1 ) nbOther++; // the cut is incident to this point
 363                             cb=theShape->NextAt(i, cb);
 364                         }
 365                         if ( nbOrig > 0 && nbOther > 0 ) {
 366                             // point incident to both path and cut: an intersection
 367                             // note that you only keep one position on the source; you could have degenerate
 368                             // cases where the source crosses itself at this point, and you wouyld miss an intersection
 369                             toCut=(Path::cut_position*)realloc(toCut, (nbToCut+1)*sizeof(Path::cut_position));
 370                             toCut[nbToCut].piece=piece;
 371                             toCut[nbToCut].t=t;
 372                             nbToCut++;
 373                         }
 374                     }
 375                 }
 376             }
 377             {
 378                 // i think it's useless now
 379                 int i = theShape->numberOfEdges() - 1;
 380                 for (;i>=0;i--) {
 381                     if ( theShape->ebData[i].pathID == 1 ) {
 382                         theShape->SubEdge(i);
 383                     }
 384                 }
 385             }
 386
 387         }
 388     }
 389
 390     int*    nesting=NULL;
 391     int*    conts=NULL;
 392     int     nbNest=0;
 393     // pour compenser le swap juste avant
 394     if ( bop == bool_op_slice ) {
 395 //    theShape->ConvertToForme(res, nbOriginaux, originaux, true);
 396 //    res->ConvertForcedToMoveTo();
 397         res->Copy(originaux[0]);
 398         res->ConvertPositionsToMoveTo(nbToCut, toCut); // cut where you found intersections
 399         free(toCut);
 400     } else if ( bop == bool_op_cut ) {
 401         // il faut appeler pour desallouer PointData (pas vital, mais bon)
 402         // the Booleen() function did not deallocated the point_data array in theShape, because this
 403         // function needs it.
 404         // this function uses the point_data to get the winding number of each path (ie: is a hole or not)
 405         // for later reconstruction in objects, you also need to extract which path is parent of holes (nesting info)
 406         theShape->ConvertToFormeNested(res, nbOriginaux, &originaux[0], 1, nbNest, nesting, conts);
 407     } else {
 408         theShape->ConvertToForme(res, nbOriginaux, &originaux[0]);
 409     }
 410
 411     delete theShape;
 412     delete theShapeA;
 413     delete theShapeB;
 414     for (int i = 0; i < nbOriginaux; i++)  delete originaux[i];
 415
 416     if (res->descr_cmd.size() <= 1)
 417     {
 418         // only one command, presumably a moveto: it isn't a path
 419         for (GSList *l = il; l != NULL; l = l->next)
 420         {
 421             SP_OBJECT(l->data)->deleteObject();
 422         }
 423         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 424                          description);
 425         selection->clear();
 426
 427         delete res;
 428         g_slist_free(il);
 429         return;
 430     }
 431
 432     // get the source path object
 433     SPObject *source;
 434     if ( bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 435         if (reverseOrderForOp) {
 436              source = SP_OBJECT(il->data);
 437         } else {
 438              source = SP_OBJECT(il->next->data);
 439         }
 440     } else {
 441         // find out the bottom object
 442         GSList *sorted = g_slist_copy((GSList *) selection->reprList());
 443
 444         sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
 445
 446         source = sp_desktop_document(desktop)->
 447             getObjectByRepr((Inkscape::XML::Node *)sorted->data);
 448
 449         g_slist_free(sorted);
 450     }
 451
 452     // adjust style properties that depend on a possible transform in the source object in order
 453     // to get a correct style attribute for the new path
 454     SPItem* item_source = SP_ITEM(source);
 455     NR::Matrix i2root(sp_item_i2root_affine(item_source));
 456     sp_item_adjust_stroke(item_source, NR::expansion(i2root));
 457     sp_item_adjust_pattern(item_source, i2root);
 458     sp_item_adjust_gradient(item_source, i2root);
 459     sp_item_adjust_livepatheffect(item_source, i2root);
 460
 461     Inkscape::XML::Node *repr_source = SP_OBJECT_REPR(source);
 462
 463     // remember important aspects of the source path, to be restored
 464     gint pos = repr_source->position();
 465     Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
 466     gchar const *id = repr_source->attribute("id");
 467     gchar const *style = repr_source->attribute("style");
 468     gchar const *mask = repr_source->attribute("mask");
 469     gchar const *clip_path = repr_source->attribute("clip-path");
 470     gchar *title = source->title();
 471     gchar *desc = source->desc();
 472     // remove source paths
 473     selection->clear();
 474     for (GSList *l = il; l != NULL; l = l->next) {
 475         // if this is the bottommost object,
 476         if (!strcmp(SP_OBJECT_REPR(l->data)->attribute("id"), id)) {
 477             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 478             SP_OBJECT(l->data)->deleteObject(false);
 479         } else {
 480             // delete the object for real, so that its clones can take appropriate action
 481             SP_OBJECT(l->data)->deleteObject();
 482         }
 483     }
 484     g_slist_free(il);
 485
 486     // premultiply by the inverse of parent's repr
 487     SPItem *parent_item = SP_ITEM(sp_desktop_document(desktop)->getObjectByRepr(parent));
 488     NR::Matrix local (sp_item_i2doc_affine(parent_item));
 489     gchar *transform = sp_svg_transform_write(local.inverse());
 490
 491     // now that we have the result, add it on the canvas
 492     if ( bop == bool_op_cut || bop == bool_op_slice ) {
 493         int    nbRP=0;
 494         Path** resPath;
 495         if ( bop == bool_op_slice ) {
 496             // there are moveto's at each intersection, but it's still one unique path
 497             // so break it down and add each subpath independently
 498             // we could call break_apart to do this, but while we have the description...
 499             resPath=res->SubPaths(nbRP, false);
 500         } else {
 501             // cut operation is a bit wicked: you need to keep holes
 502             // that's why you needed the nesting
 503             // ConvertToFormeNested() dumped all the subpath in a single Path "res", so we need
 504             // to get the path for each part of the polygon. that's why you need the nesting info:
 505             // to know in wich subpath to add a subpath
 506             resPath=res->SubPathsWithNesting(nbRP, true, nbNest, nesting, conts);
 507
 508             // cleaning
 509             if ( conts ) free(conts);
 510             if ( nesting ) free(nesting);
 511         }
 512
 513         // add all the pieces resulting from cut or slice
 514         for (int i=0;i<nbRP;i++) {
 515             gchar *d = resPath[i]->svg_dump_path();
 516
 517             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 518             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 519             repr->setAttribute("style", style);
 520             if (mask)
 521                 repr->setAttribute("mask", mask);
 522             if (clip_path)
 523                 repr->setAttribute("clip-path", clip_path);
 524
 525             repr->setAttribute("d", d);
 526             g_free(d);
 527
 528             // for slice, remove fill
 529             if (bop == bool_op_slice) {
 530                 SPCSSAttr *css;
 531
 532                 css = sp_repr_css_attr_new();
 533                 sp_repr_css_set_property(css, "fill", "none");
 534
 535                 sp_repr_css_change(repr, css, "style");
 536
 537                 sp_repr_css_attr_unref(css);
 538             }
 539
 540             // we assign the same id on all pieces, but it on adding to document, it will be changed on all except one
 541             // this means it's basically random which of the pieces inherits the original's id and clones
 542             // a better algorithm might figure out e.g. the biggest piece
 543             repr->setAttribute("id", id);
 544
 545             repr->setAttribute("transform", transform);
 546
 547             // add the new repr to the parent
 548             parent->appendChild(repr);
 549
 550             // move to the saved position
 551             repr->setPosition(pos > 0 ? pos : 0);
 552
 553             selection->add(repr);
 554             Inkscape::GC::release(repr);
 555
 556             delete resPath[i];
 557         }
 558         if ( resPath ) free(resPath);
 559
 560     } else {
 561         gchar *d = res->svg_dump_path();
 562
 563         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 564         Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 565         repr->setAttribute("style", style);
 566
 567         if ( mask )
 568             repr->setAttribute("mask", mask);
 569
 570         if ( clip_path )
 571             repr->setAttribute("clip-path", clip_path);
 572
 573         repr->setAttribute("d", d);
 574         g_free(d);
 575
 576         repr->setAttribute("transform", transform);
 577
 578         repr->setAttribute("id", id);
 579         parent->appendChild(repr);
 580         if (title) {
 581                 sp_desktop_document(desktop)->getObjectByRepr(repr)->setTitle(title);
 582         }
 583         if (desc) {
 584                 sp_desktop_document(desktop)->getObjectByRepr(repr)->setDesc(desc);
 585         }
 586                 repr->setPosition(pos > 0 ? pos : 0);
 587
 588         selection->add(repr);
 589         Inkscape::GC::release(repr);
 590     }
 591
 592     g_free(transform);
 593     if (title) g_free(title);
 594     if (desc) g_free(desc);
 595
 596     if (verb != SP_VERB_NONE) {
 597         sp_document_done(sp_desktop_document(desktop), verb, description);
 598     }
 599
 600     delete res;
 601 }
 602
 603 static
 604 void sp_selected_path_outline_add_marker( SPObject *marker_object, Geom::Matrix marker_transform, NR::scale stroke_scale, NR::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     NR::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         NR::Matrix const transform(item->transform);
 688         float const scale = NR::expansion(transform);
 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                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_START] ) {
 861                         Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
 862                         sp_selected_path_outline_add_marker( marker_obj, m,
 863                                                              NR::scale(i_style->stroke_width.computed), transform,
 864                                                              g_repr, xml_doc, doc );
 865                     }
 866
 867                     SPObject *midmarker_obj = shape->marker[SP_MARKER_LOC_MID];
 868                     if ( midmarker_obj && (path_it->size_default() > 1) ) {
 869                         Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
 870                         Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
 871                         while (curve_it2 != path_it->end_default())
 872                         {
 873                             /* Put marker between curve_it1 and curve_it2.
 874                              * Loop to end_default (so including closing segment), because when a path is closed,
 875                              * there should be a midpoint marker between last segment and closing straight line segment
 876                              */
 877                             Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
 878                             sp_selected_path_outline_add_marker( midmarker_obj, m,
 879                                                                  NR::scale(i_style->stroke_width.computed), transform,
 880                                                                  g_repr, xml_doc, doc );
 881
 882                             ++curve_it1;
 883                             ++curve_it2;
 884                         }
 885                     }
 886
 887                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_END] ) {
 888                         /* Get reference to last curve in the path.
 889                          * For moveto-only path, this returns the "closing line segment". */
 890                         unsigned int index = path_it->size_default();
 891                         if (index > 0) {
 892                             index--;
 893                         }
 894                         Geom::Curve const &lastcurve = (*path_it)[index];
 895
 896                         Geom::Matrix const m = sp_shape_marker_get_transform_at_end(lastcurve);
 897                         sp_selected_path_outline_add_marker( marker_obj, m,
 898                                                              NR::scale(i_style->stroke_width.computed), transform,
 899                                                              g_repr, xml_doc, doc );
 900                     }
 901                 }
 902
 903                 selection->add(g_repr);
 904
 905                 Inkscape::GC::release(g_repr);
 906
 907
 908             } else {
 909
 910                 // add the new repr to the parent
 911                 parent->appendChild(repr);
 912
 913                 // move to the saved position
 914                 repr->setPosition(pos > 0 ? pos : 0);
 915
 916                 // restore title, description, id, transform
 917                 repr->setAttribute("id", id);
 918
 919                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 920                 sp_item_write_transform(newitem, repr, transform);
 921                 if (title) {
 922                         newitem->setTitle(title);
 923                 }
 924                 if (desc) {
 925                         newitem->setDesc(desc);
 926                 }
 927
 928                 selection->add(repr);
 929
 930             }
 931
 932             Inkscape::GC::release(repr);
 933
 934             curve->unref();
 935             selection->remove(item);
 936             SP_OBJECT(item)->deleteObject(false);
 937
 938         }
 939         if (title) g_free(title);
 940         if (desc) g_free(desc);
 941
 942         delete res;
 943         delete orig;
 944     }
 945
 946     if (did) {
 947         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_OUTLINE,
 948                          _("Convert stroke to path"));
 949     } else {
 950         // TRANSLATORS: "to outline" means "to convert stroke to path"
 951         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> in the selection."));
 952         return;
 953     }
 954 }
 955
 956
 957 void
 958 sp_selected_path_offset(SPDesktop *desktop)
 959 {
 960     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 961
 962     sp_selected_path_do_offset(desktop, true, prefOffset);
 963 }
 964 void
 965 sp_selected_path_inset(SPDesktop *desktop)
 966 {
 967     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 968
 969     sp_selected_path_do_offset(desktop, false, prefOffset);
 970 }
 971
 972 void
 973 sp_selected_path_offset_screen(SPDesktop *desktop, double pixels)
 974 {
 975     sp_selected_path_do_offset(desktop, true,  pixels / desktop->current_zoom());
 976 }
 977
 978 void
 979 sp_selected_path_inset_screen(SPDesktop *desktop, double pixels)
 980 {
 981     sp_selected_path_do_offset(desktop, false,  pixels / desktop->current_zoom());
 982 }
 983
 984
 985 void sp_selected_path_create_offset_object_zero(SPDesktop *desktop)
 986 {
 987     sp_selected_path_create_offset_object(desktop, 0, false);
 988 }
 989
 990 void sp_selected_path_create_offset(SPDesktop *desktop)
 991 {
 992     sp_selected_path_create_offset_object(desktop, 1, false);
 993 }
 994 void sp_selected_path_create_inset(SPDesktop *desktop)
 995 {
 996     sp_selected_path_create_offset_object(desktop, -1, false);
 997 }
 998
 999 void sp_selected_path_create_updating_offset_object_zero(SPDesktop *desktop)
1000 {
1001     sp_selected_path_create_offset_object(desktop, 0, true);
1002 }
1003
1004 void sp_selected_path_create_updating_offset(SPDesktop *desktop)
1005 {
1006     sp_selected_path_create_offset_object(desktop, 1, true);
1007 }
1008 void sp_selected_path_create_updating_inset(SPDesktop *desktop)
1009 {
1010     sp_selected_path_create_offset_object(desktop, -1, true);
1011 }
1012
1013 void
1014 sp_selected_path_create_offset_object(SPDesktop *desktop, int expand, bool updating)
1015 {
1016     Inkscape::Selection *selection;
1017     Inkscape::XML::Node *repr;
1018     SPItem *item;
1019     SPCurve *curve;
1020     gchar *style, *str;
1021     float o_width, o_miter;
1022     JoinType o_join;
1023     ButtType o_butt;
1024
1025     curve = NULL;
1026
1027     selection = sp_desktop_selection(desktop);
1028
1029     item = selection->singleItem();
1030
1031     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
1032         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
1033         return;
1034     }
1035     if (SP_IS_SHAPE(item))
1036     {
1037         curve = sp_shape_get_curve(SP_SHAPE(item));
1038         if (curve == NULL)
1039             return;
1040     }
1041     if (SP_IS_TEXT(item))
1042     {
1043         curve = SP_TEXT(item)->getNormalizedBpath();
1044         if (curve == NULL)
1045             return;
1046     }
1047
1048     NR::Matrix const transform(item->transform);
1049
1050     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1051
1052     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
1053
1054     // remember the position of the item
1055     gint pos = SP_OBJECT_REPR(item)->position();
1056     // remember parent
1057     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1058
1059     {
1060         SPStyle *i_style = SP_OBJECT(item)->style;
1061         int jointype, captype;
1062
1063         jointype = i_style->stroke_linejoin.value;
1064         captype = i_style->stroke_linecap.value;
1065         o_width = i_style->stroke_width.computed;
1066         if (jointype == SP_STROKE_LINEJOIN_MITER)
1067         {
1068             o_join = join_pointy;
1069         }
1070         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
1071         {
1072             o_join = join_round;
1073         }
1074         else
1075         {
1076             o_join = join_straight;
1077         }
1078         if (captype == SP_STROKE_LINECAP_SQUARE)
1079         {
1080             o_butt = butt_square;
1081         }
1082         else if (captype == SP_STROKE_LINECAP_ROUND)
1083         {
1084             o_butt = butt_round;
1085         }
1086         else
1087         {
1088             o_butt = butt_straight;
1089         }
1090
1091         {
1092             double prefOffset = 1.0;
1093             prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", prefOffset);
1094             o_width = prefOffset;
1095         }
1096
1097         if (o_width < 0.01)
1098             o_width = 0.01;
1099         o_miter = i_style->stroke_miterlimit.value * o_width;
1100     }
1101
1102     Path *orig = Path_for_item(item, true, false);
1103     if (orig == NULL)
1104     {
1105         g_free(style);
1106         curve->unref();
1107         return;
1108     }
1109
1110     Path *res = new Path;
1111     res->SetBackData(false);
1112
1113     {
1114         Shape *theShape = new Shape;
1115         Shape *theRes = new Shape;
1116
1117         orig->ConvertWithBackData(1.0);
1118         orig->Fill(theShape, 0);
1119
1120         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1121         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1122         if (val && strcmp(val, "nonzero") == 0)
1123         {
1124             theRes->ConvertToShape(theShape, fill_nonZero);
1125         }
1126         else if (val && strcmp(val, "evenodd") == 0)
1127         {
1128             theRes->ConvertToShape(theShape, fill_oddEven);
1129         }
1130         else
1131         {
1132             theRes->ConvertToShape(theShape, fill_nonZero);
1133         }
1134
1135         Path *originaux[1];
1136         originaux[0] = orig;
1137         theRes->ConvertToForme(res, 1, originaux);
1138
1139         delete theShape;
1140         delete theRes;
1141     }
1142
1143     curve->unref();
1144
1145     if (res->descr_cmd.size() <= 1)
1146     {
1147         // pas vraiment de points sur le resultat
1148         // donc il ne reste rien
1149         sp_document_done(sp_desktop_document(desktop),
1150                          (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1151                           : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1152                          (updating ? _("Create linked offset")
1153                           : _("Create dynamic offset")));
1154         selection->clear();
1155
1156         delete res;
1157         delete orig;
1158         g_free(style);
1159         return;
1160     }
1161
1162     {
1163         gchar tstr[80];
1164
1165         tstr[79] = '\0';
1166
1167         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1168         repr = xml_doc->createElement("svg:path");
1169         repr->setAttribute("sodipodi:type", "inkscape:offset");
1170         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1171                                                           ? o_width
1172                                                           : expand < 0
1173                                                           ? -o_width
1174                                                           : 0 ));
1175
1176         str = res->svg_dump_path();
1177         repr->setAttribute("inkscape:original", str);
1178         g_free(str);
1179
1180         if ( updating ) {
1181             char const *id = SP_OBJECT(item)->repr->attribute("id");
1182             char const *uri = g_strdup_printf("#%s", id);
1183             repr->setAttribute("xlink:href", uri);
1184             g_free((void *) uri);
1185         } else {
1186             repr->setAttribute("inkscape:href", NULL);
1187         }
1188
1189         repr->setAttribute("style", style);
1190
1191         // add the new repr to the parent
1192         parent->appendChild(repr);
1193
1194         // move to the saved position
1195         repr->setPosition(pos > 0 ? pos : 0);
1196
1197         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1198
1199         if ( updating ) {
1200             // on conserve l'original
1201             // we reapply the transform to the original (offset will feel it)
1202             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1203         } else {
1204             // delete original, apply the transform to the offset
1205             SP_OBJECT(item)->deleteObject(false);
1206             sp_item_write_transform(nitem, repr, transform);
1207         }
1208
1209         // The object just created from a temporary repr is only a seed.
1210         // We need to invoke its write which will update its real repr (in particular adding d=)
1211         SP_OBJECT(nitem)->updateRepr();
1212
1213         Inkscape::GC::release(repr);
1214
1215         selection->set(nitem);
1216     }
1217
1218     sp_document_done(sp_desktop_document(desktop),
1219                      (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1220                       : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1221                      (updating ? _("Create linked offset")
1222                       : _("Create dynamic offset")));
1223
1224     delete res;
1225     delete orig;
1226
1227     g_free(style);
1228 }
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241 void
1242 sp_selected_path_do_offset(SPDesktop *desktop, bool expand, double prefOffset)
1243 {
1244     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1245
1246     if (selection->isEmpty()) {
1247         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1248         return;
1249     }
1250
1251     bool did = false;
1252
1253     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1254          items != NULL;
1255          items = items->next) {
1256
1257         SPItem *item = (SPItem *) items->data;
1258
1259         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1260             continue;
1261
1262         SPCurve *curve = NULL;
1263         if (SP_IS_SHAPE(item)) {
1264             curve = sp_shape_get_curve(SP_SHAPE(item));
1265             if (curve == NULL)
1266                 continue;
1267         }
1268         if (SP_IS_TEXT(item)) {
1269             curve = SP_TEXT(item)->getNormalizedBpath();
1270             if (curve == NULL)
1271                 continue;
1272         }
1273
1274         NR::Matrix const transform(item->transform);
1275
1276         sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1277
1278         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1279
1280         float o_width, o_miter;
1281         JoinType o_join;
1282         ButtType o_butt;
1283
1284         {
1285             SPStyle *i_style = SP_OBJECT(item)->style;
1286             int jointype, captype;
1287
1288             jointype = i_style->stroke_linejoin.value;
1289             captype = i_style->stroke_linecap.value;
1290             o_width = i_style->stroke_width.computed;
1291
1292             switch (jointype) {
1293                 case SP_STROKE_LINEJOIN_MITER:
1294                     o_join = join_pointy;
1295                     break;
1296                 case SP_STROKE_LINEJOIN_ROUND:
1297                     o_join = join_round;
1298                     break;
1299                 default:
1300                     o_join = join_straight;
1301                     break;
1302             }
1303
1304             switch (captype) {
1305                 case SP_STROKE_LINECAP_SQUARE:
1306                     o_butt = butt_square;
1307                     break;
1308                 case SP_STROKE_LINECAP_ROUND:
1309                     o_butt = butt_round;
1310                     break;
1311                 default:
1312                     o_butt = butt_straight;
1313                     break;
1314             }
1315
1316             o_width = prefOffset;
1317
1318             if (o_width < 0.1)
1319                 o_width = 0.1;
1320             o_miter = i_style->stroke_miterlimit.value * o_width;
1321         }
1322
1323         Path *orig = Path_for_item(item, false);
1324         if (orig == NULL) {
1325             g_free(style);
1326             curve->unref();
1327             continue;
1328         }
1329
1330         Path *res = new Path;
1331         res->SetBackData(false);
1332
1333         {
1334             Shape *theShape = new Shape;
1335             Shape *theRes = new Shape;
1336
1337             orig->ConvertWithBackData(0.03);
1338             orig->Fill(theShape, 0);
1339
1340             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1341             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1342             if (val && strcmp(val, "nonzero") == 0)
1343             {
1344                 theRes->ConvertToShape(theShape, fill_nonZero);
1345             }
1346             else if (val && strcmp(val, "evenodd") == 0)
1347             {
1348                 theRes->ConvertToShape(theShape, fill_oddEven);
1349             }
1350             else
1351             {
1352                 theRes->ConvertToShape(theShape, fill_nonZero);
1353             }
1354
1355             // et maintenant: offset
1356             // methode inexacte
1357 /*                      Path *originaux[1];
1358                         originaux[0] = orig;
1359                         theRes->ConvertToForme(res, 1, originaux);
1360
1361                         if (expand) {
1362                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1363                         } else {
1364                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1365                         }
1366
1367                         orig->ConvertWithBackData(1.0);
1368                         orig->Fill(theShape, 0);
1369                         theRes->ConvertToShape(theShape, fill_positive);
1370                         originaux[0] = orig;
1371                         theRes->ConvertToForme(res, 1, originaux);
1372
1373                         if (o_width >= 0.5) {
1374                         //     res->Coalesce(1.0);
1375                         res->ConvertEvenLines(1.0);
1376                         res->Simplify(1.0);
1377                         } else {
1378                         //      res->Coalesce(o_width);
1379                         res->ConvertEvenLines(1.0*o_width);
1380                         res->Simplify(1.0 * o_width);
1381                         }    */
1382             // methode par makeoffset
1383
1384             if (expand)
1385             {
1386                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1387             }
1388             else
1389             {
1390                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1391             }
1392             theRes->ConvertToShape(theShape, fill_positive);
1393
1394             res->Reset();
1395             theRes->ConvertToForme(res);
1396
1397             if (o_width >= 1.0)
1398             {
1399                 res->ConvertEvenLines(1.0);
1400                 res->Simplify(1.0);
1401             }
1402             else
1403             {
1404                 res->ConvertEvenLines(1.0*o_width);
1405                 res->Simplify(1.0 * o_width);
1406             }
1407
1408             delete theShape;
1409             delete theRes;
1410         }
1411
1412         did = true;
1413
1414         curve->unref();
1415         // remember the position of the item
1416         gint pos = SP_OBJECT_REPR(item)->position();
1417         // remember parent
1418         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1419         // remember id
1420         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1421
1422         selection->remove(item);
1423         SP_OBJECT(item)->deleteObject(false);
1424
1425         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1426
1427             gchar tstr[80];
1428
1429             tstr[79] = '\0';
1430
1431             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1432             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1433
1434             repr->setAttribute("style", style);
1435
1436             gchar *str = res->svg_dump_path();
1437             repr->setAttribute("d", str);
1438             g_free(str);
1439
1440             // add the new repr to the parent
1441             parent->appendChild(repr);
1442
1443             // move to the saved position
1444             repr->setPosition(pos > 0 ? pos : 0);
1445
1446             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1447
1448             // reapply the transform
1449             sp_item_write_transform(newitem, repr, transform);
1450
1451             repr->setAttribute("id", id);
1452
1453             selection->add(repr);
1454
1455             Inkscape::GC::release(repr);
1456         }
1457
1458         delete orig;
1459         delete res;
1460     }
1461
1462     if (did) {
1463         sp_document_done(sp_desktop_document(desktop),
1464                          (expand ? SP_VERB_SELECTION_OFFSET : SP_VERB_SELECTION_INSET),
1465                          (expand ? _("Outset path") : _("Inset path")));
1466     } else {
1467         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1468         return;
1469     }
1470 }
1471
1472
1473 static bool
1474 sp_selected_path_simplify_items(SPDesktop *desktop,
1475                                 Inkscape::Selection *selection, GSList *items,
1476                                 float threshold,  bool justCoalesce,
1477                                 float angleLimit, bool breakableAngles,
1478                                 bool modifySelection);
1479
1480
1481 //return true if we changed something, else false
1482 bool
1483 sp_selected_path_simplify_item(SPDesktop *desktop,
1484                  Inkscape::Selection *selection, SPItem *item,
1485                  float threshold,  bool justCoalesce,
1486                  float angleLimit, bool breakableAngles,
1487                  gdouble size,     bool modifySelection)
1488 {
1489     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1490         return false;
1491
1492     //If this is a group, do the children instead
1493     if (SP_IS_GROUP(item)) {
1494         GSList *items = sp_item_group_item_list(SP_GROUP(item));
1495
1496         return sp_selected_path_simplify_items(desktop, selection, items,
1497                                                threshold, justCoalesce,
1498                                                angleLimit, breakableAngles,
1499                                                false);
1500     }
1501
1502
1503     SPCurve *curve = NULL;
1504
1505     if (SP_IS_SHAPE(item)) {
1506         curve = sp_shape_get_curve(SP_SHAPE(item));
1507         if (!curve)
1508             return false;
1509     }
1510
1511     if (SP_IS_TEXT(item)) {
1512         curve = SP_TEXT(item)->getNormalizedBpath();
1513         if (!curve)
1514             return false;
1515     }
1516
1517     // save the transform, to re-apply it after simplification
1518     NR::Matrix const transform(item->transform);
1519
1520     /*
1521        reset the transform, effectively transforming the item by transform.inverse();
1522        this is necessary so that the item is transformed twice back and forth,
1523        allowing all compensations to cancel out regardless of the preferences
1524     */
1525     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1526
1527     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1528     gchar *mask = g_strdup(SP_OBJECT_REPR(item)->attribute("mask"));
1529     gchar *clip_path = g_strdup(SP_OBJECT_REPR(item)->attribute("clip-path"));
1530
1531     Path *orig = Path_for_item(item, false);
1532     if (orig == NULL) {
1533         g_free(style);
1534         curve->unref();
1535         return false;
1536     }
1537
1538     curve->unref();
1539     // remember the position of the item
1540     gint pos = SP_OBJECT_REPR(item)->position();
1541     // remember parent
1542     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1543     // remember id
1544     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1545     // remember path effect
1546     char const *patheffect = SP_OBJECT_REPR(item)->attribute("inkscape:path-effect");
1547     // remember title
1548     gchar *title = item->title();
1549     // remember description
1550     gchar *desc = item->desc();
1551
1552     //If a group was selected, to not change the selection list
1553     if (modifySelection)
1554         selection->remove(item);
1555
1556     SP_OBJECT(item)->deleteObject(false);
1557
1558     if ( justCoalesce ) {
1559         orig->Coalesce(threshold * size);
1560     } else {
1561         orig->ConvertEvenLines(threshold * size);
1562         orig->Simplify(threshold * size);
1563     }
1564
1565     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1566     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1567
1568     // restore style, mask and clip-path
1569     repr->setAttribute("style", style);
1570     g_free(style);
1571
1572     if ( mask ) {
1573         repr->setAttribute("mask", mask);
1574         g_free(mask);
1575     }
1576
1577     if ( clip_path ) {
1578         repr->setAttribute("clip-path", clip_path);
1579         g_free(clip_path);
1580     }
1581
1582     // path
1583     gchar *str = orig->svg_dump_path();
1584     if (patheffect)
1585         repr->setAttribute("inkscape:original-d", str);
1586     else
1587         repr->setAttribute("d", str);
1588     g_free(str);
1589
1590     // restore id
1591     repr->setAttribute("id", id);
1592
1593     // add the new repr to the parent
1594     parent->appendChild(repr);
1595
1596     // move to the saved position
1597     repr->setPosition(pos > 0 ? pos : 0);
1598
1599     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1600
1601     // reapply the transform
1602     sp_item_write_transform(newitem, repr, transform);
1603
1604     // restore path effect
1605     repr->setAttribute("inkscape:path-effect", patheffect);
1606
1607     // restore title & description
1608     if (title) {
1609         newitem->setTitle(title);
1610         g_free(title);
1611     }
1612     if (desc) {
1613         newitem->setDesc(desc);
1614         g_free(desc);
1615     }
1616
1617     //If we are not in a selected group
1618     if (modifySelection)
1619         selection->add(repr);
1620
1621     Inkscape::GC::release(repr);
1622
1623     // clean up
1624     if (orig) delete orig;
1625
1626     return true;
1627 }
1628
1629
1630 bool
1631 sp_selected_path_simplify_items(SPDesktop *desktop,
1632                                 Inkscape::Selection *selection, GSList *items,
1633                                 float threshold,  bool justCoalesce,
1634                                 float angleLimit, bool breakableAngles,
1635                                 bool modifySelection)
1636 {
1637   bool simplifyIndividualPaths =
1638     (bool) prefs_get_int_attribute("options.simplifyindividualpaths", "value", 0);
1639
1640   gchar *simplificationType;
1641   if (simplifyIndividualPaths) {
1642       simplificationType = _("Simplifying paths (separately):");
1643   } else {
1644       simplificationType = _("Simplifying paths:");
1645   }
1646
1647   bool didSomething = false;
1648
1649   boost::optional<NR::Rect> selectionBbox = selection->bounds();
1650   if (!selectionBbox) {
1651     return false;
1652   }
1653   gdouble selectionSize  = L2(selectionBbox->dimensions());
1654
1655   gdouble simplifySize  = selectionSize;
1656
1657   int pathsSimplified = 0;
1658   int totalPathCount  = g_slist_length(items);
1659
1660   // set "busy" cursor
1661   desktop->setWaitingCursor();
1662
1663   for (; items != NULL; items = items->next) {
1664       SPItem *item = (SPItem *) items->data;
1665
1666       if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1667           continue;
1668
1669       if (simplifyIndividualPaths) {
1670           boost::optional<NR::Rect> itemBbox = item->getBounds(sp_item_i2d_affine(item));
1671           if (itemBbox) {
1672               simplifySize      = L2(itemBbox->dimensions());
1673           } else {
1674               simplifySize      = 0;
1675           }
1676       }
1677
1678       pathsSimplified++;
1679
1680       if (pathsSimplified % 20 == 0) {
1681         gchar *message = g_strdup_printf(_("%s <b>%d</b> of <b>%d</b> paths simplified..."), simplificationType, pathsSimplified, totalPathCount);
1682         desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, message);
1683       }
1684
1685       didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1686                           threshold, justCoalesce, angleLimit, breakableAngles, simplifySize, modifySelection);
1687   }
1688
1689   desktop->clearWaitingCursor();
1690
1691   if (pathsSimplified > 20) {
1692     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, g_strdup_printf(_("<b>%d</b> paths simplified."), pathsSimplified));
1693   }
1694
1695   return didSomething;
1696 }
1697
1698 void
1699 sp_selected_path_simplify_selection(SPDesktop *desktop, float threshold, bool justCoalesce,
1700                                     float angleLimit, bool breakableAngles)
1701 {
1702     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1703
1704     if (selection->isEmpty()) {
1705         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1706                          _("Select <b>path(s)</b> to simplify."));
1707         return;
1708     }
1709
1710     GSList *items = g_slist_copy((GSList *) selection->itemList());
1711
1712     bool didSomething = sp_selected_path_simplify_items(desktop, selection,
1713                                                         items, threshold,
1714                                                         justCoalesce,
1715                                                         angleLimit,
1716                                                         breakableAngles, true);
1717
1718     if (didSomething)
1719         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_SIMPLIFY,
1720                          _("Simplify"));
1721     else
1722         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1723
1724 }
1725
1726
1727 // globals for keeping track of accelerated simplify
1728 static double previousTime      = 0.0;
1729 static gdouble simplifyMultiply = 1.0;
1730
1731 void
1732 sp_selected_path_simplify(SPDesktop *desktop)
1733 {
1734     gdouble simplifyThreshold =
1735         prefs_get_double_attribute("options.simplifythreshold", "value", 0.003);
1736     bool simplifyJustCoalesce =
1737         (bool) prefs_get_int_attribute("options.simplifyjustcoalesce", "value", 0);
1738
1739     //Get the current time
1740     GTimeVal currentTimeVal;
1741     g_get_current_time(&currentTimeVal);
1742     double currentTime = currentTimeVal.tv_sec * 1000000 +
1743                 currentTimeVal.tv_usec;
1744
1745     //Was the previous call to this function recent? (<0.5 sec)
1746     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1747
1748         // add to the threshold 1/2 of its original value
1749         simplifyMultiply  += 0.5;
1750         simplifyThreshold *= simplifyMultiply;
1751
1752     } else {
1753         // reset to the default
1754         simplifyMultiply = 1;
1755     }
1756
1757     //remember time for next call
1758     previousTime = currentTime;
1759
1760     //g_print("%g\n", simplify_threshold);
1761
1762     //Make the actual call
1763     sp_selected_path_simplify_selection(desktop, simplifyThreshold,
1764                                         simplifyJustCoalesce, 0.0, false);
1765 }
1766
1767
1768
1769 // fonctions utilitaires
1770
1771 bool
1772 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1773 {
1774     if (who == NULL || a == NULL)
1775         return false;
1776     if (who == a)
1777         return true;
1778     return Ancetre(sp_repr_parent(a), who);
1779 }
1780
1781 Path *
1782 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1783 {
1784     SPCurve *curve = curve_for_item(item);
1785
1786     if (curve == NULL)
1787         return NULL;
1788
1789     Geom::PathVector *pathv = pathvector_for_curve(item, curve, doTransformation, transformFull, Geom::identity(), Geom::identity());
1790     curve->unref();
1791
1792     Path *dest = new Path;
1793     dest->LoadPathVector(*pathv);
1794     delete pathv;
1795
1796     return dest;
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, Geom::Matrix extraPreAffine, Geom::Matrix extraPostAffine)
1805 {
1806     if (curve == NULL)
1807         return NULL;
1808
1809     Geom::PathVector *dest = new Geom::PathVector;
1810     *dest = curve->get_pathvector(); // Make a copy; must be freed by the caller!
1811
1812     if (doTransformation) {
1813         if (transformFull) {
1814             *dest *= extraPreAffine * sp_item_i2doc_affine(item) * extraPostAffine;
1815         } else {
1816             *dest *= extraPreAffine * (Geom::Matrix)item->transform * extraPostAffine;
1817         }
1818     } else {
1819         *dest *= extraPreAffine * extraPostAffine;
1820     }
1821
1822     return dest;
1823 }
1824
1825 SPCurve* curve_for_item(SPItem *item)
1826 {
1827     if (!item)
1828         return NULL;
1829
1830     SPCurve *curve = NULL;
1831     if (SP_IS_SHAPE(item)) {
1832         if (SP_IS_PATH(item)) {
1833             curve = sp_path_get_curve_for_edit(SP_PATH(item));
1834         } else {
1835             curve = sp_shape_get_curve(SP_SHAPE(item));
1836         }
1837     }
1838     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item))
1839     {
1840         curve = te_get_layout(item)->convertToCurves();
1841     }
1842     else if (SP_IS_IMAGE(item))
1843     {
1844     curve = sp_image_get_curve(SP_IMAGE(item));
1845     }
1846
1847     return curve; // do not forget to unref the curve at some point!
1848 }
1849
1850 boost::optional<Path::cut_position> get_nearest_position_on_Path(Path *path, NR::Point p, unsigned seg)
1851 {
1852     //get nearest position on path
1853     Path::cut_position pos = path->PointToCurvilignPosition(p, seg);
1854     return pos;
1855 }
1856
1857 NR::Point get_point_on_Path(Path *path, int piece, double t)
1858 {
1859     NR::Point p;
1860     path->PointAt(piece, t, p);
1861     return p;
1862 }
1863
1864
1865 /*
1866   Local Variables:
1867   mode:c++
1868   c-file-style:"stroustrup"
1869   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1870   indent-tabs-mode:nil
1871   fill-column:99
1872   End:
1873 */
1874 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :