src/splivarot.cpp

   1 #define __SP_LIVAROT_C__
   2 /*
   3  *  splivarot.cpp
   4  *  Inkscape
   5  *
   6  *  Created by fred on Fri Dec 05 2003.
   7  *  tweaked endlessly by bulia byak <buliabyak@users.sf.net>
   8  *  public domain
   9  *
  10  */
  11
  12 /*
  13  * contains lots of stitched pieces of path-chemistry.c
  14  */
  15
  16 #ifdef HAVE_CONFIG_H
  17 # include <config.h>
  18 #endif
  19
  20 #include <cstring>
  21 #include <string>
  22 #include <vector>
  23 #include <glib/gmem.h>
  24 #include "xml/repr.h"
  25 #include "svg/svg.h"
  26 #include "sp-path.h"
  27 #include "sp-shape.h"
  28 #include "sp-image.h"
  29 #include "marker.h"
  30 #include "enums.h"
  31 #include "sp-text.h"
  32 #include "sp-flowtext.h"
  33 #include "text-editing.h"
  34 #include "sp-item-group.h"
  35 #include "style.h"
  36 #include "inkscape.h"
  37 #include "document.h"
  38 #include "message-stack.h"
  39 #include "selection.h"
  40 #include "desktop-handles.h"
  41 #include "desktop.h"
  42 #include "display/canvas-bpath.h"
  43 #include "display/curve.h"
  44 #include <glibmm/i18n.h>
  45 #include "prefs-utils.h"
  46
  47 #include "libnr/n-art-bpath.h"
  48 #include "libnr/nr-path.h"
  49 #include "xml/repr.h"
  50 #include "xml/repr-sorting.h"
  51 #include <2geom/pathvector.h>
  52 #include <libnr/nr-matrix-fns.h>
  53 #include <libnr/nr-matrix-ops.h>
  54 #include <libnr/nr-matrix-translate-ops.h>
  55 #include <libnr/nr-scale-matrix-ops.h>
  56 #include <libnr/n-art-bpath-2geom.h>
  57 #include "helper/geom.h"
  58
  59 #include "livarot/Path.h"
  60 #include "livarot/Shape.h"
  61
  62 #include "splivarot.h"
  63
  64 bool   Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who);
  65
  66 void sp_selected_path_boolop(bool_op bop, const unsigned int verb=SP_VERB_NONE, const Glib::ustring description="");
  67 void sp_selected_path_do_offset(bool expand, double prefOffset);
  68 void sp_selected_path_create_offset_object(int expand, bool updating);
  69
  70 void
  71 sp_selected_path_union()
  72 {
  73     sp_selected_path_boolop(bool_op_union, SP_VERB_SELECTION_UNION, _("Union"));
  74 }
  75
  76 void
  77 sp_selected_path_union_skip_undo()
  78 {
  79     sp_selected_path_boolop(bool_op_union, SP_VERB_NONE, _("Union"));
  80 }
  81
  82 void
  83 sp_selected_path_intersect()
  84 {
  85     sp_selected_path_boolop(bool_op_inters, SP_VERB_SELECTION_INTERSECT, _("Intersection"));
  86 }
  87
  88 void
  89 sp_selected_path_diff()
  90 {
  91     sp_selected_path_boolop(bool_op_diff, SP_VERB_SELECTION_DIFF, _("Difference"));
  92 }
  93
  94 void
  95 sp_selected_path_diff_skip_undo()
  96 {
  97     sp_selected_path_boolop(bool_op_diff, SP_VERB_NONE, _("Difference"));
  98 }
  99
 100 void
 101 sp_selected_path_symdiff()
 102 {
 103     sp_selected_path_boolop(bool_op_symdiff, SP_VERB_SELECTION_SYMDIFF, _("Exclusion"));
 104 }
 105 void
 106 sp_selected_path_cut()
 107 {
 108     sp_selected_path_boolop(bool_op_cut, SP_VERB_SELECTION_CUT, _("Division"));
 109 }
 110 void
 111 sp_selected_path_slice()
 112 {
 113     sp_selected_path_boolop(bool_op_slice, SP_VERB_SELECTION_SLICE,  _("Cut path"));
 114 }
 115
 116
 117 // boolean operations
 118 // take the source paths from the file, do the operation, delete the originals and add the results
 119 void
 120 sp_selected_path_boolop(bool_op bop, const unsigned int verb, const Glib::ustring description)
 121 {
 122     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 123
 124     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 125
 126     GSList *il = (GSList *) selection->itemList();
 127
 128     // allow union on a single object for the purpose of removing self overlapse (svn log, revision 13334)
 129     if ( (g_slist_length(il) < 2) && (bop != bool_op_union)) {
 130         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 2 paths</b> to perform a boolean operation."));
 131         return;
 132     }
 133     else if ( g_slist_length(il) < 1 ) {
 134         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 1 path</b> to perform a boolean union."));
 135         return;
 136     }
 137
 138     if (g_slist_length(il) > 2) {
 139         if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 140             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>exactly 2 paths</b> to perform difference, XOR, division, or path cut."));
 141             return;
 142         }
 143     }
 144
 145     // reverseOrderForOp marks whether the order of the list is the top->down order
 146     // it's only used when there are 2 objects, and for operations who need to know the
 147     // topmost object (differences, cuts)
 148     bool reverseOrderForOp = false;
 149
 150     // mettre les elements de la liste dans l'ordre pour ces operations
 151     if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice) {
 152         // check in the tree to find which element of the selection list is topmost (for 2-operand commands only)
 153         Inkscape::XML::Node *a = SP_OBJECT_REPR(il->data);
 154         Inkscape::XML::Node *b = SP_OBJECT_REPR(il->next->data);
 155
 156         if (a == NULL || b == NULL) {
 157             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."));
 158             return;
 159         }
 160
 161         if (Ancetre(a, b)) {
 162             // a is the parent of b, already in the proper order
 163         } else if (Ancetre(b, a)) {
 164             // reverse order
 165             reverseOrderForOp = true;
 166         } else {
 167
 168             // objects are not in parent/child relationship;
 169             // find their lowest common ancestor
 170             Inkscape::XML::Node *dad = LCA(a, b);
 171             if (dad == NULL) {
 172                 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."));
 173                 return;
 174             }
 175
 176             // find the children of the LCA that lead from it to the a and b
 177             Inkscape::XML::Node *as = AncetreFils(a, dad);
 178             Inkscape::XML::Node *bs = AncetreFils(b, dad);
 179
 180             // find out which comes first
 181             for (Inkscape::XML::Node *child = dad->firstChild(); child; child = child->next()) {
 182                 if (child == as) {
 183                     /* a first, so reverse. */
 184                     reverseOrderForOp = true;
 185                     break;
 186                 }
 187                 if (child == bs)
 188                     break;
 189             }
 190         }
 191     }
 192
 193     il = g_slist_copy(il);
 194
 195     // first check if all the input objects have shapes
 196     // otherwise bail out
 197     for (GSList *l = il; l != NULL; l = l->next)
 198     {
 199         SPItem *item = SP_ITEM(l->data);
 200         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item) && !SP_IS_FLOWTEXT(item))
 201         {
 202             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("One of the objects is <b>not a path</b>, cannot perform boolean operation."));
 203             g_slist_free(il);
 204             return;
 205         }
 206     }
 207
 208     // extract the livarot Paths from the source objects
 209     // also get the winding rule specified in the style
 210     int nbOriginaux = g_slist_length(il);
 211     std::vector<Path *> originaux(nbOriginaux);
 212     std::vector<FillRule> origWind(nbOriginaux);
 213     int curOrig;
 214     {
 215         curOrig = 0;
 216         for (GSList *l = il; l != NULL; l = l->next)
 217         {
 218             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(il->data), "style");
 219             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 220             if (val && strcmp(val, "nonzero") == 0) {
 221                 origWind[curOrig]= fill_nonZero;
 222             } else if (val && strcmp(val, "evenodd") == 0) {
 223                 origWind[curOrig]= fill_oddEven;
 224             } else {
 225                 origWind[curOrig]= fill_nonZero;
 226             }
 227
 228             originaux[curOrig] = Path_for_item((SPItem *) l->data, true, true);
 229             if (originaux[curOrig] == NULL || originaux[curOrig]->descr_cmd.size() <= 1)
 230             {
 231                 for (int i = curOrig; i >= 0; i--) delete originaux[i];
 232                 g_slist_free(il);
 233                 return;
 234             }
 235             curOrig++;
 236         }
 237     }
 238     // reverse if needed
 239     // note that the selection list keeps its order
 240     if ( reverseOrderForOp ) {
 241         Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 242         FillRule swai=origWind[0]; origWind[0]=origWind[1]; origWind[1]=swai;
 243     }
 244
 245     // and work
 246     // some temporary instances, first
 247     Shape *theShapeA = new Shape;
 248     Shape *theShapeB = new Shape;
 249     Shape *theShape = new Shape;
 250     Path *res = new Path;
 251     res->SetBackData(false);
 252     Path::cut_position  *toCut=NULL;
 253     int                  nbToCut=0;
 254
 255     if ( bop == bool_op_inters || bop == bool_op_union || bop == bool_op_diff || bop == bool_op_symdiff ) {
 256         // true boolean op
 257         // get the polygons of each path, with the winding rule specified, and apply the operation iteratively
 258         originaux[0]->ConvertWithBackData(0.1);
 259
 260         originaux[0]->Fill(theShape, 0);
 261
 262         theShapeA->ConvertToShape(theShape, origWind[0]);
 263
 264         curOrig = 1;
 265         for (GSList *l = il->next; l != NULL; l = l->next) {
 266             originaux[curOrig]->ConvertWithBackData(0.1);
 267
 268             originaux[curOrig]->Fill(theShape, curOrig);
 269
 270             theShapeB->ConvertToShape(theShape, origWind[curOrig]);
 271
 272             // les elements arrivent en ordre inverse dans la liste
 273             theShape->Booleen(theShapeB, theShapeA, bop);
 274
 275             {
 276                 Shape *swap = theShape;
 277                 theShape = theShapeA;
 278                 theShapeA = swap;
 279             }
 280             curOrig++;
 281         }
 282
 283         {
 284             Shape *swap = theShape;
 285             theShape = theShapeA;
 286             theShapeA = swap;
 287         }
 288
 289     } else if ( bop == bool_op_cut ) {
 290         // cuts= sort of a bastard boolean operation, thus not the axact same modus operandi
 291         // technically, the cut path is not necessarily a polygon (thus has no winding rule)
 292         // it is just uncrossed, and cleaned from duplicate edges and points
 293         // then it's fed to Booleen() which will uncross it against the other path
 294         // then comes the trick: each edge of the cut path is duplicated (one in each direction),
 295         // thus making a polygon. the weight of the edges of the cut are all 0, but
 296         // the Booleen need to invert the ones inside the source polygon (for the subsequent
 297         // ConvertToForme)
 298
 299         // the cut path needs to have the highest pathID in the back data
 300         // that's how the Booleen() function knows it's an edge of the cut
 301
 302         // FIXME: this gives poor results, the final paths are full of extraneous nodes. Decreasing
 303         // ConvertWithBackData parameter below simply increases the number of nodes, so for now I
 304         // left it at 1.0. Investigate replacing this by a combination of difference and
 305         // intersection of the same two paths. -- bb
 306         {
 307             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 308             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 309         }
 310         originaux[0]->ConvertWithBackData(1.0);
 311
 312         originaux[0]->Fill(theShape, 0);
 313
 314         theShapeA->ConvertToShape(theShape, origWind[0]);
 315
 316         originaux[1]->ConvertWithBackData(1.0);
 317
 318         originaux[1]->Fill(theShape, 1,false,false,false); //do not closeIfNeeded
 319
 320         theShapeB->ConvertToShape(theShape, fill_justDont); // fill_justDont doesn't computes winding numbers
 321
 322         // les elements arrivent en ordre inverse dans la liste
 323         theShape->Booleen(theShapeB, theShapeA, bool_op_cut, 1);
 324
 325     } else if ( bop == bool_op_slice ) {
 326         // slice is not really a boolean operation
 327         // you just put the 2 shapes in a single polygon, uncross it
 328         // the points where the degree is > 2 are intersections
 329         // just check it's an intersection on the path you want to cut, and keep it
 330         // the intersections you have found are then fed to ConvertPositionsToMoveTo() which will
 331         // make new subpath at each one of these positions
 332         // inversion pour l'op\8eration
 333         {
 334             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 335             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 336         }
 337         originaux[0]->ConvertWithBackData(1.0);
 338
 339         originaux[0]->Fill(theShapeA, 0,false,false,false); // don't closeIfNeeded
 340
 341         originaux[1]->ConvertWithBackData(1.0);
 342
 343         originaux[1]->Fill(theShapeA, 1,true,false,false);// don't closeIfNeeded and just dump in the shape, don't reset it
 344
 345         theShape->ConvertToShape(theShapeA, fill_justDont);
 346
 347         if ( theShape->hasBackData() ) {
 348             // should always be the case, but ya never know
 349             {
 350                 for (int i = 0; i < theShape->numberOfPoints(); i++) {
 351                     if ( theShape->getPoint(i).totalDegree() > 2 ) {
 352                         // possibly an intersection
 353                         // we need to check that at least one edge from the source path is incident to it
 354                         // before we declare it's an intersection
 355                         int cb = theShape->getPoint(i).incidentEdge[FIRST];
 356                         int   nbOrig=0;
 357                         int   nbOther=0;
 358                         int   piece=-1;
 359                         float t=0.0;
 360                         while ( cb >= 0 && cb < theShape->numberOfEdges() ) {
 361                             if ( theShape->ebData[cb].pathID == 0 ) {
 362                                 // the source has an edge incident to the point, get its position on the path
 363                                 piece=theShape->ebData[cb].pieceID;
 364                                 if ( theShape->getEdge(cb).st == i ) {
 365                                     t=theShape->ebData[cb].tSt;
 366                                 } else {
 367                                     t=theShape->ebData[cb].tEn;
 368                                 }
 369                                 nbOrig++;
 370                             }
 371                             if ( theShape->ebData[cb].pathID == 1 ) nbOther++; // the cut is incident to this point
 372                             cb=theShape->NextAt(i, cb);
 373                         }
 374                         if ( nbOrig > 0 && nbOther > 0 ) {
 375                             // point incident to both path and cut: an intersection
 376                             // note that you only keep one position on the source; you could have degenerate
 377                             // cases where the source crosses itself at this point, and you wouyld miss an intersection
 378                             toCut=(Path::cut_position*)realloc(toCut, (nbToCut+1)*sizeof(Path::cut_position));
 379                             toCut[nbToCut].piece=piece;
 380                             toCut[nbToCut].t=t;
 381                             nbToCut++;
 382                         }
 383                     }
 384                 }
 385             }
 386             {
 387                 // i think it's useless now
 388                 int i = theShape->numberOfEdges() - 1;
 389                 for (;i>=0;i--) {
 390                     if ( theShape->ebData[i].pathID == 1 ) {
 391                         theShape->SubEdge(i);
 392                     }
 393                 }
 394             }
 395
 396         }
 397     }
 398
 399     int*    nesting=NULL;
 400     int*    conts=NULL;
 401     int     nbNest=0;
 402     // pour compenser le swap juste avant
 403     if ( bop == bool_op_slice ) {
 404 //    theShape->ConvertToForme(res, nbOriginaux, originaux, true);
 405 //    res->ConvertForcedToMoveTo();
 406         res->Copy(originaux[0]);
 407         res->ConvertPositionsToMoveTo(nbToCut, toCut); // cut where you found intersections
 408         free(toCut);
 409     } else if ( bop == bool_op_cut ) {
 410         // il faut appeler pour desallouer PointData (pas vital, mais bon)
 411         // the Booleen() function did not deallocated the point_data array in theShape, because this
 412         // function needs it.
 413         // this function uses the point_data to get the winding number of each path (ie: is a hole or not)
 414         // for later reconstruction in objects, you also need to extract which path is parent of holes (nesting info)
 415         theShape->ConvertToFormeNested(res, nbOriginaux, &originaux[0], 1, nbNest, nesting, conts);
 416     } else {
 417         theShape->ConvertToForme(res, nbOriginaux, &originaux[0]);
 418     }
 419
 420     delete theShape;
 421     delete theShapeA;
 422     delete theShapeB;
 423     for (int i = 0; i < nbOriginaux; i++)  delete originaux[i];
 424
 425     if (res->descr_cmd.size() <= 1)
 426     {
 427         // only one command, presumably a moveto: it isn't a path
 428         for (GSList *l = il; l != NULL; l = l->next)
 429         {
 430             SP_OBJECT(l->data)->deleteObject();
 431         }
 432         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 433                          description);
 434         selection->clear();
 435
 436         delete res;
 437         g_slist_free(il);
 438         return;
 439     }
 440
 441     // get the source path object
 442     SPObject *source;
 443     if ( bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 444         if (reverseOrderForOp) {
 445              source = SP_OBJECT(il->data);
 446         } else {
 447              source = SP_OBJECT(il->next->data);
 448         }
 449     } else {
 450         // find out the bottom object
 451         GSList *sorted = g_slist_copy((GSList *) selection->reprList());
 452
 453         sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
 454
 455         source = sp_desktop_document(desktop)->
 456             getObjectByRepr((Inkscape::XML::Node *)sorted->data);
 457
 458         g_slist_free(sorted);
 459     }
 460
 461     // adjust style properties that depend on a possible transform in the source object in order
 462     // to get a correct style attribute for the new path
 463     SPItem* item_source = SP_ITEM(source);
 464     NR::Matrix i2root = from_2geom(sp_item_i2root_affine(item_source));
 465     sp_item_adjust_stroke(item_source, NR::expansion(i2root));
 466     sp_item_adjust_pattern(item_source, i2root);
 467     sp_item_adjust_gradient(item_source, i2root);
 468     sp_item_adjust_livepatheffect(item_source, i2root);
 469
 470     Inkscape::XML::Node *repr_source = SP_OBJECT_REPR(source);
 471
 472     // remember important aspects of the source path, to be restored
 473     gint pos = repr_source->position();
 474     Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
 475     gchar const *id = repr_source->attribute("id");
 476     gchar const *style = repr_source->attribute("style");
 477     gchar const *mask = repr_source->attribute("mask");
 478     gchar const *clip_path = repr_source->attribute("clip-path");
 479
 480     // remove source paths
 481     selection->clear();
 482     for (GSList *l = il; l != NULL; l = l->next) {
 483         // if this is the bottommost object,
 484         if (!strcmp(SP_OBJECT_REPR(l->data)->attribute("id"), id)) {
 485             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 486             SP_OBJECT(l->data)->deleteObject(false);
 487         } else {
 488             // delete the object for real, so that its clones can take appropriate action
 489             SP_OBJECT(l->data)->deleteObject();
 490         }
 491     }
 492     g_slist_free(il);
 493
 494     // premultiply by the inverse of parent's repr
 495     SPItem *parent_item = SP_ITEM(sp_desktop_document(desktop)->getObjectByRepr(parent));
 496     NR::Matrix local = from_2geom(sp_item_i2doc_affine(parent_item));
 497     gchar *transform = sp_svg_transform_write(local.inverse());
 498
 499     // now that we have the result, add it on the canvas
 500     if ( bop == bool_op_cut || bop == bool_op_slice ) {
 501         int    nbRP=0;
 502         Path** resPath;
 503         if ( bop == bool_op_slice ) {
 504             // there are moveto's at each intersection, but it's still one unique path
 505             // so break it down and add each subpath independently
 506             // we could call break_apart to do this, but while we have the description...
 507             resPath=res->SubPaths(nbRP, false);
 508         } else {
 509             // cut operation is a bit wicked: you need to keep holes
 510             // that's why you needed the nesting
 511             // ConvertToFormeNested() dumped all the subpath in a single Path "res", so we need
 512             // to get the path for each part of the polygon. that's why you need the nesting info:
 513             // to know in wich subpath to add a subpath
 514             resPath=res->SubPathsWithNesting(nbRP, true, nbNest, nesting, conts);
 515
 516             // cleaning
 517             if ( conts ) free(conts);
 518             if ( nesting ) free(nesting);
 519         }
 520
 521         // add all the pieces resulting from cut or slice
 522         for (int i=0;i<nbRP;i++) {
 523             gchar *d = resPath[i]->svg_dump_path();
 524
 525             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 526             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 527             repr->setAttribute("style", style);
 528             if (mask)
 529                 repr->setAttribute("mask", mask);
 530             if (clip_path)
 531                 repr->setAttribute("clip-path", clip_path);
 532
 533             repr->setAttribute("d", d);
 534             g_free(d);
 535
 536             // for slice, remove fill
 537             if (bop == bool_op_slice) {
 538                 SPCSSAttr *css;
 539
 540                 css = sp_repr_css_attr_new();
 541                 sp_repr_css_set_property(css, "fill", "none");
 542
 543                 sp_repr_css_change(repr, css, "style");
 544
 545                 sp_repr_css_attr_unref(css);
 546             }
 547
 548             // we assign the same id on all pieces, but it on adding to document, it will be changed on all except one
 549             // this means it's basically random which of the pieces inherits the original's id and clones
 550             // a better algorithm might figure out e.g. the biggest piece
 551             repr->setAttribute("id", id);
 552
 553             repr->setAttribute("transform", transform);
 554
 555             // add the new repr to the parent
 556             parent->appendChild(repr);
 557
 558             // move to the saved position
 559             repr->setPosition(pos > 0 ? pos : 0);
 560
 561             selection->add(repr);
 562             Inkscape::GC::release(repr);
 563
 564             delete resPath[i];
 565         }
 566         if ( resPath ) free(resPath);
 567
 568     } else {
 569         gchar *d = res->svg_dump_path();
 570
 571         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 572         Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 573         repr->setAttribute("style", style);
 574
 575         if ( mask )
 576             repr->setAttribute("mask", mask);
 577
 578         if ( clip_path )
 579             repr->setAttribute("clip-path", clip_path);
 580
 581         repr->setAttribute("d", d);
 582         g_free(d);
 583
 584         repr->setAttribute("transform", transform);
 585
 586         repr->setAttribute("id", id);
 587         parent->appendChild(repr);
 588         repr->setPosition(pos > 0 ? pos : 0);
 589
 590         selection->add(repr);
 591         Inkscape::GC::release(repr);
 592     }
 593
 594     g_free(transform);
 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(from_2geom(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()
 629 {
 630     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 631
 632     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 633
 634     if (selection->isEmpty()) {
 635         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>stroked path(s)</b> to convert stroke to path."));
 636         return;
 637     }
 638
 639     bool did = false;
 640
 641     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 642          items != NULL;
 643          items = items->next) {
 644
 645         SPItem *item = (SPItem *) items->data;
 646
 647         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 648             continue;
 649
 650         SPCurve *curve = NULL;
 651         if (SP_IS_SHAPE(item)) {
 652             curve = sp_shape_get_curve(SP_SHAPE(item));
 653             if (curve == NULL)
 654                 continue;
 655         }
 656         if (SP_IS_TEXT(item)) {
 657             curve = SP_TEXT(item)->getNormalizedBpath();
 658             if (curve == NULL)
 659                 continue;
 660         }
 661
 662         // pas de stroke pas de chocolat
 663         if (!SP_OBJECT_STYLE(item) || SP_OBJECT_STYLE(item)->stroke.noneSet) {
 664             curve->unref();
 665             continue;
 666         }
 667
 668         // remember old stroke style, to be set on fill
 669         SPStyle *i_style = SP_OBJECT_STYLE(item);
 670         SPCSSAttr *ncss;
 671         {
 672             ncss = sp_css_attr_from_style(i_style, SP_STYLE_FLAG_ALWAYS);
 673             gchar const *s_val = sp_repr_css_property(ncss, "stroke", NULL);
 674             gchar const *s_opac = sp_repr_css_property(ncss, "stroke-opacity", NULL);
 675
 676             sp_repr_css_set_property(ncss, "stroke", "none");
 677             sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
 678             sp_repr_css_set_property(ncss, "fill", s_val);
 679             if ( s_opac ) {
 680                 sp_repr_css_set_property(ncss, "fill-opacity", s_opac);
 681             } else {
 682                 sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
 683             }
 684             sp_repr_css_unset_property(ncss, "marker-start");
 685             sp_repr_css_unset_property(ncss, "marker-mid");
 686             sp_repr_css_unset_property(ncss, "marker-end");
 687         }
 688
 689         NR::Matrix const transform(item->transform);
 690         float const scale = NR::expansion(transform);
 691         gchar const *mask = SP_OBJECT_REPR(item)->attribute("mask");
 692         gchar const *clip_path = SP_OBJECT_REPR(item)->attribute("clip-path");
 693
 694         float o_width, o_miter;
 695         JoinType o_join;
 696         ButtType o_butt;
 697
 698         {
 699             int jointype, captype;
 700
 701             jointype = i_style->stroke_linejoin.computed;
 702             captype = i_style->stroke_linecap.computed;
 703             o_width = i_style->stroke_width.computed;
 704
 705             switch (jointype) {
 706                 case SP_STROKE_LINEJOIN_MITER:
 707                     o_join = join_pointy;
 708                     break;
 709                 case SP_STROKE_LINEJOIN_ROUND:
 710                     o_join = join_round;
 711                     break;
 712                 default:
 713                     o_join = join_straight;
 714                     break;
 715             }
 716
 717             switch (captype) {
 718                 case SP_STROKE_LINECAP_SQUARE:
 719                     o_butt = butt_square;
 720                     break;
 721                 case SP_STROKE_LINECAP_ROUND:
 722                     o_butt = butt_round;
 723                     break;
 724                 default:
 725                     o_butt = butt_straight;
 726                     break;
 727             }
 728
 729             if (o_width < 0.1)
 730                 o_width = 0.1;
 731             o_miter = i_style->stroke_miterlimit.value * o_width;
 732         }
 733
 734         SPCurve *curvetemp = curve_for_item(item);
 735         if (curvetemp == NULL) {
 736             curve->unref();
 737             continue;
 738         }
 739         // Livarots outline of arcs is broken. So convert the path to linear and cubics only, for which the outline is created correctly.
 740         Geom::PathVector pathv = pathv_to_linear_and_cubic_beziers( curvetemp->get_pathvector() );
 741         curvetemp->unref();
 742
 743         Path *orig = new Path;
 744         orig->LoadPathVector(pathv);
 745
 746         Path *res = new Path;
 747         res->SetBackData(false);
 748
 749         if (i_style->stroke_dash.n_dash) {
 750             // For dashed strokes, use Stroke method, because Outline can't do dashes
 751             // However Stroke adds lots of extra nodes _or_ makes the path crooked, so consider this a temporary workaround
 752
 753             orig->ConvertWithBackData(0.1);
 754
 755             orig->DashPolylineFromStyle(i_style, scale, 0);
 756
 757             Shape* theShape = new Shape;
 758             orig->Stroke(theShape, false, 0.5*o_width, o_join, o_butt,
 759                          0.5 * o_miter);
 760             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 761
 762             Shape *theRes = new Shape;
 763
 764             theRes->ConvertToShape(theShape, fill_positive);
 765
 766             Path *originaux[1];
 767             originaux[0] = res;
 768             theRes->ConvertToForme(orig, 1, originaux);
 769
 770             res->Coalesce(5.0);
 771
 772             delete theShape;
 773             delete theRes;
 774
 775         } else {
 776
 777             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 778
 779             orig->Coalesce(0.5 * o_width);
 780
 781             Shape *theShape = new Shape;
 782             Shape *theRes = new Shape;
 783
 784             res->ConvertWithBackData(1.0);
 785             res->Fill(theShape, 0);
 786             theRes->ConvertToShape(theShape, fill_positive);
 787
 788             Path *originaux[1];
 789             originaux[0] = res;
 790             theRes->ConvertToForme(orig, 1, originaux);
 791
 792             delete theShape;
 793             delete theRes;
 794         }
 795
 796         if (orig->descr_cmd.size() <= 1) {
 797             // ca a merd\8e, ou bien le resultat est vide
 798             delete res;
 799             delete orig;
 800             continue;
 801         }
 802
 803         did = true;
 804
 805         // remember the position of the item
 806         gint pos = SP_OBJECT_REPR(item)->position();
 807         // remember parent
 808         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 809         // remember id
 810         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 811
 812         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
 813
 814             SPDocument * doc = sp_desktop_document(desktop);
 815             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 816             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 817
 818             // restore old style, but set old stroke style on fill
 819             sp_repr_css_change(repr, ncss, "style");
 820
 821             sp_repr_css_attr_unref(ncss);
 822
 823             gchar *str = orig->svg_dump_path();
 824             repr->setAttribute("d", str);
 825             g_free(str);
 826
 827             if (mask)
 828                 repr->setAttribute("mask", mask);
 829             if (clip_path)
 830                 repr->setAttribute("clip-path", clip_path);
 831
 832             if (SP_IS_SHAPE(item) && sp_shape_has_markers (SP_SHAPE(item))) {
 833
 834                 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 835                 Inkscape::XML::Node *g_repr = xml_doc->createElement("svg:g");
 836
 837                 // add the group to the parent
 838                 parent->appendChild(g_repr);
 839                 // move to the saved position
 840                 g_repr->setPosition(pos > 0 ? pos : 0);
 841
 842                 g_repr->appendChild(repr);
 843                 repr->setAttribute("id", id);
 844                 SPItem *newitem = (SPItem *) doc->getObjectByRepr(repr);
 845                 sp_item_write_transform(newitem, repr, transform);
 846
 847                 SPShape *shape = SP_SHAPE(item);
 848
 849                 Geom::PathVector const & pathv = curve->get_pathvector();
 850                 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
 851                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_START] ) {
 852                         Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
 853                         sp_selected_path_outline_add_marker( marker_obj, m,
 854                                                              NR::scale(i_style->stroke_width.computed), transform,
 855                                                              g_repr, xml_doc, doc );
 856                     }
 857
 858                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_MID] ) {
 859                         Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
 860                         Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
 861                         while (curve_it2 != path_it->end_default())
 862                         {
 863                             /* Put marker between curve_it1 and curve_it2.
 864                              * Loop to end_default (so including closing segment), because when a path is closed,
 865                              * there should be a midpoint marker between last segment and closing straight line segment
 866                              */
 867                             Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
 868                             sp_selected_path_outline_add_marker( marker_obj, m,
 869                                                                  NR::scale(i_style->stroke_width.computed), transform,
 870                                                                  g_repr, xml_doc, doc );
 871
 872                             ++curve_it1;
 873                             ++curve_it2;
 874                         }
 875                     }
 876
 877                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_END] ) {
 878                         Geom::Matrix const m (sp_shape_marker_get_transform_at_end(path_it->back_default()));
 879                         sp_selected_path_outline_add_marker( marker_obj, m,
 880                                                              NR::scale(i_style->stroke_width.computed), transform,
 881                                                              g_repr, xml_doc, doc );
 882                     }
 883                 }
 884
 885                 selection->add(g_repr);
 886
 887                 Inkscape::GC::release(g_repr);
 888
 889
 890             } else {
 891
 892                 // add the new repr to the parent
 893                 parent->appendChild(repr);
 894
 895                 // move to the saved position
 896                 repr->setPosition(pos > 0 ? pos : 0);
 897
 898                 repr->setAttribute("id", id);
 899
 900                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 901                 sp_item_write_transform(newitem, repr, transform);
 902
 903                 selection->add(repr);
 904
 905             }
 906
 907             Inkscape::GC::release(repr);
 908
 909             curve->unref();
 910             selection->remove(item);
 911             SP_OBJECT(item)->deleteObject(false);
 912
 913         }
 914
 915         delete res;
 916         delete orig;
 917     }
 918
 919     if (did) {
 920         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_OUTLINE,
 921                          _("Convert stroke to path"));
 922     } else {
 923         // TRANSLATORS: "to outline" means "to convert stroke to path"
 924         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> in the selection."));
 925         return;
 926     }
 927 }
 928
 929
 930 void
 931 sp_selected_path_offset()
 932 {
 933     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 934
 935     sp_selected_path_do_offset(true, prefOffset);
 936 }
 937 void
 938 sp_selected_path_inset()
 939 {
 940     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 941
 942     sp_selected_path_do_offset(false, prefOffset);
 943 }
 944
 945 void
 946 sp_selected_path_offset_screen(double pixels)
 947 {
 948     sp_selected_path_do_offset(true,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 949 }
 950
 951 void
 952 sp_selected_path_inset_screen(double pixels)
 953 {
 954     sp_selected_path_do_offset(false,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 955 }
 956
 957
 958 void sp_selected_path_create_offset_object_zero()
 959 {
 960     sp_selected_path_create_offset_object(0, false);
 961 }
 962
 963 void sp_selected_path_create_offset()
 964 {
 965     sp_selected_path_create_offset_object(1, false);
 966 }
 967 void sp_selected_path_create_inset()
 968 {
 969     sp_selected_path_create_offset_object(-1, false);
 970 }
 971
 972 void sp_selected_path_create_updating_offset_object_zero()
 973 {
 974     sp_selected_path_create_offset_object(0, true);
 975 }
 976
 977 void sp_selected_path_create_updating_offset()
 978 {
 979     sp_selected_path_create_offset_object(1, true);
 980 }
 981 void sp_selected_path_create_updating_inset()
 982 {
 983     sp_selected_path_create_offset_object(-1, true);
 984 }
 985
 986 void
 987 sp_selected_path_create_offset_object(int expand, bool updating)
 988 {
 989     Inkscape::Selection *selection;
 990     Inkscape::XML::Node *repr;
 991     SPItem *item;
 992     SPCurve *curve;
 993     gchar *style, *str;
 994     SPDesktop *desktop;
 995     float o_width, o_miter;
 996     JoinType o_join;
 997     ButtType o_butt;
 998
 999     curve = NULL;
1000
1001     desktop = SP_ACTIVE_DESKTOP;
1002
1003     selection = sp_desktop_selection(desktop);
1004
1005     item = selection->singleItem();
1006
1007     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
1008         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
1009         return;
1010     }
1011     if (SP_IS_SHAPE(item))
1012     {
1013         curve = sp_shape_get_curve(SP_SHAPE(item));
1014         if (curve == NULL)
1015             return;
1016     }
1017     if (SP_IS_TEXT(item))
1018     {
1019         curve = SP_TEXT(item)->getNormalizedBpath();
1020         if (curve == NULL)
1021             return;
1022     }
1023
1024     NR::Matrix const transform(item->transform);
1025
1026     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1027
1028     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
1029
1030     // remember the position of the item
1031     gint pos = SP_OBJECT_REPR(item)->position();
1032     // remember parent
1033     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1034
1035     {
1036         SPStyle *i_style = SP_OBJECT(item)->style;
1037         int jointype, captype;
1038
1039         jointype = i_style->stroke_linejoin.value;
1040         captype = i_style->stroke_linecap.value;
1041         o_width = i_style->stroke_width.computed;
1042         if (jointype == SP_STROKE_LINEJOIN_MITER)
1043         {
1044             o_join = join_pointy;
1045         }
1046         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
1047         {
1048             o_join = join_round;
1049         }
1050         else
1051         {
1052             o_join = join_straight;
1053         }
1054         if (captype == SP_STROKE_LINECAP_SQUARE)
1055         {
1056             o_butt = butt_square;
1057         }
1058         else if (captype == SP_STROKE_LINECAP_ROUND)
1059         {
1060             o_butt = butt_round;
1061         }
1062         else
1063         {
1064             o_butt = butt_straight;
1065         }
1066
1067         {
1068             double prefOffset = 1.0;
1069             prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", prefOffset);
1070             o_width = prefOffset;
1071         }
1072
1073         if (o_width < 0.01)
1074             o_width = 0.01;
1075         o_miter = i_style->stroke_miterlimit.value * o_width;
1076     }
1077
1078     Path *orig = Path_for_item(item, true, false);
1079     if (orig == NULL)
1080     {
1081         g_free(style);
1082         curve->unref();
1083         return;
1084     }
1085
1086     Path *res = new Path;
1087     res->SetBackData(false);
1088
1089     {
1090         Shape *theShape = new Shape;
1091         Shape *theRes = new Shape;
1092
1093         orig->ConvertWithBackData(1.0);
1094         orig->Fill(theShape, 0);
1095
1096         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1097         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1098         if (val && strcmp(val, "nonzero") == 0)
1099         {
1100             theRes->ConvertToShape(theShape, fill_nonZero);
1101         }
1102         else if (val && strcmp(val, "evenodd") == 0)
1103         {
1104             theRes->ConvertToShape(theShape, fill_oddEven);
1105         }
1106         else
1107         {
1108             theRes->ConvertToShape(theShape, fill_nonZero);
1109         }
1110
1111         Path *originaux[1];
1112         originaux[0] = orig;
1113         theRes->ConvertToForme(res, 1, originaux);
1114
1115         delete theShape;
1116         delete theRes;
1117     }
1118
1119     curve->unref();
1120
1121     if (res->descr_cmd.size() <= 1)
1122     {
1123         // pas vraiment de points sur le resultat
1124         // donc il ne reste rien
1125         sp_document_done(sp_desktop_document(desktop),
1126                          (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1127                           : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1128                          (updating ? _("Create linked offset")
1129                           : _("Create dynamic offset")));
1130         selection->clear();
1131
1132         delete res;
1133         delete orig;
1134         g_free(style);
1135         return;
1136     }
1137
1138     {
1139         gchar tstr[80];
1140
1141         tstr[79] = '\0';
1142
1143         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1144         repr = xml_doc->createElement("svg:path");
1145         repr->setAttribute("sodipodi:type", "inkscape:offset");
1146         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1147                                                           ? o_width
1148                                                           : expand < 0
1149                                                           ? -o_width
1150                                                           : 0 ));
1151
1152         str = res->svg_dump_path();
1153         repr->setAttribute("inkscape:original", str);
1154         g_free(str);
1155
1156         if ( updating ) {
1157             char const *id = SP_OBJECT(item)->repr->attribute("id");
1158             char const *uri = g_strdup_printf("#%s", id);
1159             repr->setAttribute("xlink:href", uri);
1160             g_free((void *) uri);
1161         } else {
1162             repr->setAttribute("inkscape:href", NULL);
1163         }
1164
1165         repr->setAttribute("style", style);
1166
1167         // add the new repr to the parent
1168         parent->appendChild(repr);
1169
1170         // move to the saved position
1171         repr->setPosition(pos > 0 ? pos : 0);
1172
1173         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1174
1175         if ( updating ) {
1176             // on conserve l'original
1177             // we reapply the transform to the original (offset will feel it)
1178             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1179         } else {
1180             // delete original, apply the transform to the offset
1181             SP_OBJECT(item)->deleteObject(false);
1182             sp_item_write_transform(nitem, repr, transform);
1183         }
1184
1185         // The object just created from a temporary repr is only a seed.
1186         // We need to invoke its write which will update its real repr (in particular adding d=)
1187         SP_OBJECT(nitem)->updateRepr();
1188
1189         Inkscape::GC::release(repr);
1190
1191         selection->set(nitem);
1192     }
1193
1194     sp_document_done(sp_desktop_document(desktop),
1195                      (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1196                       : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1197                      (updating ? _("Create linked offset")
1198                       : _("Create dynamic offset")));
1199
1200     delete res;
1201     delete orig;
1202
1203     g_free(style);
1204 }
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217 void
1218 sp_selected_path_do_offset(bool expand, double prefOffset)
1219 {
1220     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1221
1222     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1223
1224     if (selection->isEmpty()) {
1225         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1226         return;
1227     }
1228
1229     bool did = false;
1230
1231     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1232          items != NULL;
1233          items = items->next) {
1234
1235         SPItem *item = (SPItem *) items->data;
1236
1237         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1238             continue;
1239
1240         SPCurve *curve = NULL;
1241         if (SP_IS_SHAPE(item)) {
1242             curve = sp_shape_get_curve(SP_SHAPE(item));
1243             if (curve == NULL)
1244                 continue;
1245         }
1246         if (SP_IS_TEXT(item)) {
1247             curve = SP_TEXT(item)->getNormalizedBpath();
1248             if (curve == NULL)
1249                 continue;
1250         }
1251
1252         NR::Matrix const transform(item->transform);
1253
1254         sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1255
1256         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1257
1258         float o_width, o_miter;
1259         JoinType o_join;
1260         ButtType o_butt;
1261
1262         {
1263             SPStyle *i_style = SP_OBJECT(item)->style;
1264             int jointype, captype;
1265
1266             jointype = i_style->stroke_linejoin.value;
1267             captype = i_style->stroke_linecap.value;
1268             o_width = i_style->stroke_width.computed;
1269
1270             switch (jointype) {
1271                 case SP_STROKE_LINEJOIN_MITER:
1272                     o_join = join_pointy;
1273                     break;
1274                 case SP_STROKE_LINEJOIN_ROUND:
1275                     o_join = join_round;
1276                     break;
1277                 default:
1278                     o_join = join_straight;
1279                     break;
1280             }
1281
1282             switch (captype) {
1283                 case SP_STROKE_LINECAP_SQUARE:
1284                     o_butt = butt_square;
1285                     break;
1286                 case SP_STROKE_LINECAP_ROUND:
1287                     o_butt = butt_round;
1288                     break;
1289                 default:
1290                     o_butt = butt_straight;
1291                     break;
1292             }
1293
1294             o_width = prefOffset;
1295
1296             if (o_width < 0.1)
1297                 o_width = 0.1;
1298             o_miter = i_style->stroke_miterlimit.value * o_width;
1299         }
1300
1301         Path *orig = Path_for_item(item, false);
1302         if (orig == NULL) {
1303             g_free(style);
1304             curve->unref();
1305             continue;
1306         }
1307
1308         Path *res = new Path;
1309         res->SetBackData(false);
1310
1311         {
1312             Shape *theShape = new Shape;
1313             Shape *theRes = new Shape;
1314
1315             orig->ConvertWithBackData(0.03);
1316             orig->Fill(theShape, 0);
1317
1318             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1319             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1320             if (val && strcmp(val, "nonzero") == 0)
1321             {
1322                 theRes->ConvertToShape(theShape, fill_nonZero);
1323             }
1324             else if (val && strcmp(val, "evenodd") == 0)
1325             {
1326                 theRes->ConvertToShape(theShape, fill_oddEven);
1327             }
1328             else
1329             {
1330                 theRes->ConvertToShape(theShape, fill_nonZero);
1331             }
1332
1333             // et maintenant: offset
1334             // methode inexacte
1335 /*                      Path *originaux[1];
1336                         originaux[0] = orig;
1337                         theRes->ConvertToForme(res, 1, originaux);
1338
1339                         if (expand) {
1340                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1341                         } else {
1342                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1343                         }
1344
1345                         orig->ConvertWithBackData(1.0);
1346                         orig->Fill(theShape, 0);
1347                         theRes->ConvertToShape(theShape, fill_positive);
1348                         originaux[0] = orig;
1349                         theRes->ConvertToForme(res, 1, originaux);
1350
1351                         if (o_width >= 0.5) {
1352                         //     res->Coalesce(1.0);
1353                         res->ConvertEvenLines(1.0);
1354                         res->Simplify(1.0);
1355                         } else {
1356                         //      res->Coalesce(o_width);
1357                         res->ConvertEvenLines(1.0*o_width);
1358                         res->Simplify(1.0 * o_width);
1359                         }    */
1360             // methode par makeoffset
1361
1362             if (expand)
1363             {
1364                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1365             }
1366             else
1367             {
1368                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1369             }
1370             theRes->ConvertToShape(theShape, fill_positive);
1371
1372             res->Reset();
1373             theRes->ConvertToForme(res);
1374
1375             if (o_width >= 1.0)
1376             {
1377                 res->ConvertEvenLines(1.0);
1378                 res->Simplify(1.0);
1379             }
1380             else
1381             {
1382                 res->ConvertEvenLines(1.0*o_width);
1383                 res->Simplify(1.0 * o_width);
1384             }
1385
1386             delete theShape;
1387             delete theRes;
1388         }
1389
1390         did = true;
1391
1392         curve->unref();
1393         // remember the position of the item
1394         gint pos = SP_OBJECT_REPR(item)->position();
1395         // remember parent
1396         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1397         // remember id
1398         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1399
1400         selection->remove(item);
1401         SP_OBJECT(item)->deleteObject(false);
1402
1403         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1404
1405             gchar tstr[80];
1406
1407             tstr[79] = '\0';
1408
1409             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1410             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1411
1412             repr->setAttribute("style", style);
1413
1414             gchar *str = res->svg_dump_path();
1415             repr->setAttribute("d", str);
1416             g_free(str);
1417
1418             // add the new repr to the parent
1419             parent->appendChild(repr);
1420
1421             // move to the saved position
1422             repr->setPosition(pos > 0 ? pos : 0);
1423
1424             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1425
1426             // reapply the transform
1427             sp_item_write_transform(newitem, repr, transform);
1428
1429             repr->setAttribute("id", id);
1430
1431             selection->add(repr);
1432
1433             Inkscape::GC::release(repr);
1434         }
1435
1436         delete orig;
1437         delete res;
1438     }
1439
1440     if (did) {
1441         sp_document_done(sp_desktop_document(desktop),
1442                          (expand ? SP_VERB_SELECTION_OFFSET : SP_VERB_SELECTION_INSET),
1443                          (expand ? _("Outset path") : _("Inset path")));
1444     } else {
1445         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1446         return;
1447     }
1448 }
1449
1450
1451 static bool
1452 sp_selected_path_simplify_items(SPDesktop *desktop,
1453                                 Inkscape::Selection *selection, GSList *items,
1454                                 float threshold,  bool justCoalesce,
1455                                 float angleLimit, bool breakableAngles,
1456                                 bool modifySelection);
1457
1458
1459 //return true if we changed something, else false
1460 bool
1461 sp_selected_path_simplify_item(SPDesktop *desktop,
1462                  Inkscape::Selection *selection, SPItem *item,
1463                  float threshold,  bool justCoalesce,
1464                  float angleLimit, bool breakableAngles,
1465                  gdouble size,     bool modifySelection)
1466 {
1467     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1468         return false;
1469
1470     //If this is a group, do the children instead
1471     if (SP_IS_GROUP(item)) {
1472         GSList *items = sp_item_group_item_list(SP_GROUP(item));
1473
1474         return sp_selected_path_simplify_items(desktop, selection, items,
1475                                                threshold, justCoalesce,
1476                                                angleLimit, breakableAngles,
1477                                                false);
1478     }
1479
1480
1481     SPCurve *curve = NULL;
1482
1483     if (SP_IS_SHAPE(item)) {
1484         curve = sp_shape_get_curve(SP_SHAPE(item));
1485         if (!curve)
1486             return false;
1487     }
1488
1489     if (SP_IS_TEXT(item)) {
1490         curve = SP_TEXT(item)->getNormalizedBpath();
1491         if (!curve)
1492             return false;
1493     }
1494
1495     // save the transform, to re-apply it after simplification
1496     NR::Matrix const transform(item->transform);
1497
1498     /*
1499        reset the transform, effectively transforming the item by transform.inverse();
1500        this is necessary so that the item is transformed twice back and forth,
1501        allowing all compensations to cancel out regardless of the preferences
1502     */
1503     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1504
1505     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1506     gchar *mask = g_strdup(SP_OBJECT_REPR(item)->attribute("mask"));
1507     gchar *clip_path = g_strdup(SP_OBJECT_REPR(item)->attribute("clip-path"));
1508
1509     Path *orig = Path_for_item(item, false);
1510     if (orig == NULL) {
1511         g_free(style);
1512         curve->unref();
1513         return false;
1514     }
1515
1516     curve->unref();
1517     // remember the position of the item
1518     gint pos = SP_OBJECT_REPR(item)->position();
1519     // remember parent
1520     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1521     // remember id
1522     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1523     // remember path effect
1524     char const *patheffect = SP_OBJECT_REPR(item)->attribute("inkscape:path-effect");
1525
1526     //If a group was selected, to not change the selection list
1527     if (modifySelection)
1528         selection->remove(item);
1529
1530     SP_OBJECT(item)->deleteObject(false);
1531
1532     if ( justCoalesce ) {
1533         orig->Coalesce(threshold * size);
1534     } else {
1535         orig->ConvertEvenLines(threshold * size);
1536         orig->Simplify(threshold * size);
1537     }
1538
1539     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1540     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1541
1542     // restore style, mask and clip-path
1543     repr->setAttribute("style", style);
1544     g_free(style);
1545
1546     if ( mask ) {
1547         repr->setAttribute("mask", mask);
1548         g_free(mask);
1549     }
1550
1551     if ( clip_path ) {
1552         repr->setAttribute("clip-path", clip_path);
1553         g_free(clip_path);
1554     }
1555
1556     // path
1557     gchar *str = orig->svg_dump_path();
1558     if (patheffect)
1559         repr->setAttribute("inkscape:original-d", str);
1560     else
1561         repr->setAttribute("d", str);
1562     g_free(str);
1563
1564     // restore id
1565     repr->setAttribute("id", id);
1566
1567     // add the new repr to the parent
1568     parent->appendChild(repr);
1569
1570     // move to the saved position
1571     repr->setPosition(pos > 0 ? pos : 0);
1572
1573     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1574
1575     // reapply the transform
1576     sp_item_write_transform(newitem, repr, transform);
1577
1578     // restore path effect
1579     repr->setAttribute("inkscape:path-effect", patheffect);
1580
1581     //If we are not in a selected group
1582     if (modifySelection)
1583         selection->add(repr);
1584
1585     Inkscape::GC::release(repr);
1586
1587     // clean up
1588     if (orig) delete orig;
1589
1590     return true;
1591 }
1592
1593
1594 bool
1595 sp_selected_path_simplify_items(SPDesktop *desktop,
1596                                 Inkscape::Selection *selection, GSList *items,
1597                                 float threshold,  bool justCoalesce,
1598                                 float angleLimit, bool breakableAngles,
1599                                 bool modifySelection)
1600 {
1601   bool simplifyIndividualPaths =
1602     (bool) prefs_get_int_attribute("options.simplifyindividualpaths", "value", 0);
1603
1604   gchar *simplificationType;
1605   if (simplifyIndividualPaths) {
1606       simplificationType = _("Simplifying paths (separately):");
1607   } else {
1608       simplificationType = _("Simplifying paths:");
1609   }
1610
1611   bool didSomething = false;
1612
1613   NR::Maybe<NR::Rect> selectionBbox = selection->bounds();
1614   if (!selectionBbox) {
1615     return false;
1616   }
1617   gdouble selectionSize  = L2(selectionBbox->dimensions());
1618
1619   gdouble simplifySize  = selectionSize;
1620
1621   int pathsSimplified = 0;
1622   int totalPathCount  = g_slist_length(items);
1623
1624   // set "busy" cursor
1625   desktop->setWaitingCursor();
1626
1627   for (; items != NULL; items = items->next) {
1628       SPItem *item = (SPItem *) items->data;
1629
1630       if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1631           continue;
1632
1633       if (simplifyIndividualPaths) {
1634           NR::Maybe<NR::Rect> itemBbox = item->getBounds(from_2geom(sp_item_i2d_affine(item)));
1635           if (itemBbox) {
1636               simplifySize      = L2(itemBbox->dimensions());
1637           } else {
1638               simplifySize      = 0;
1639           }
1640       }
1641
1642       pathsSimplified++;
1643
1644       if (pathsSimplified % 20 == 0) {
1645         gchar *message = g_strdup_printf(_("%s <b>%d</b> of <b>%d</b> paths simplified..."), simplificationType, pathsSimplified, totalPathCount);
1646         desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, message);
1647       }
1648
1649       didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1650                           threshold, justCoalesce, angleLimit, breakableAngles, simplifySize, modifySelection);
1651   }
1652
1653   desktop->clearWaitingCursor();
1654
1655   if (pathsSimplified > 20) {
1656     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, g_strdup_printf(_("<b>%d</b> paths simplified."), pathsSimplified));
1657   }
1658
1659   return didSomething;
1660 }
1661
1662 void
1663 sp_selected_path_simplify_selection(float threshold, bool justCoalesce,
1664                        float angleLimit, bool breakableAngles)
1665 {
1666     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1667
1668     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1669
1670     if (selection->isEmpty()) {
1671         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1672                          _("Select <b>path(s)</b> to simplify."));
1673         return;
1674     }
1675
1676     GSList *items = g_slist_copy((GSList *) selection->itemList());
1677
1678     bool didSomething = sp_selected_path_simplify_items(desktop, selection,
1679                                                         items, threshold,
1680                                                         justCoalesce,
1681                                                         angleLimit,
1682                                                         breakableAngles, true);
1683
1684     if (didSomething)
1685         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_SIMPLIFY,
1686                          _("Simplify"));
1687     else
1688         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1689
1690 }
1691
1692
1693 // globals for keeping track of accelerated simplify
1694 static double previousTime      = 0.0;
1695 static gdouble simplifyMultiply = 1.0;
1696
1697 void
1698 sp_selected_path_simplify(void)
1699 {
1700     gdouble simplifyThreshold =
1701         prefs_get_double_attribute("options.simplifythreshold", "value", 0.003);
1702     bool simplifyJustCoalesce =
1703         (bool) prefs_get_int_attribute("options.simplifyjustcoalesce", "value", 0);
1704
1705     //Get the current time
1706     GTimeVal currentTimeVal;
1707     g_get_current_time(&currentTimeVal);
1708     double currentTime = currentTimeVal.tv_sec * 1000000 +
1709                 currentTimeVal.tv_usec;
1710
1711     //Was the previous call to this function recent? (<0.5 sec)
1712     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1713
1714         // add to the threshold 1/2 of its original value
1715         simplifyMultiply  += 0.5;
1716         simplifyThreshold *= simplifyMultiply;
1717
1718     } else {
1719         // reset to the default
1720         simplifyMultiply = 1;
1721     }
1722
1723     //remember time for next call
1724     previousTime = currentTime;
1725
1726     //g_print("%g\n", simplify_threshold);
1727
1728     //Make the actual call
1729     sp_selected_path_simplify_selection(simplifyThreshold,
1730                       simplifyJustCoalesce, 0.0, false);
1731 }
1732
1733
1734
1735 // fonctions utilitaires
1736
1737 bool
1738 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1739 {
1740     if (who == NULL || a == NULL)
1741         return false;
1742     if (who == a)
1743         return true;
1744     return Ancetre(sp_repr_parent(a), who);
1745 }
1746
1747 Path *
1748 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1749 {
1750     SPCurve *curve = curve_for_item(item);
1751     if (curve == NULL)
1752         return NULL;
1753
1754     Geom::PathVector pathv = pathvector_for_curve(item, curve, doTransformation, transformFull);
1755
1756     Path *dest = new Path;
1757     dest->LoadPathVector(pathv);
1758
1759     curve->unref();
1760
1761     return dest;
1762 }
1763
1764 /*
1765  * This function always returns a new NArtBpath, the caller must g_free the returned path!
1766 */
1767 NArtBpath *
1768 bpath_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull, NR::Matrix extraPreAffine, NR::Matrix extraPostAffine)
1769 {
1770     if (curve == NULL)
1771         return NULL;
1772
1773     NArtBpath *bpath = BPath_from_2GeomPath(curve->get_pathvector());
1774     if (bpath == NULL) {
1775         return NULL;
1776     }
1777
1778     NArtBpath *new_bpath; // we will get a duplicate which has to be freed at some point!
1779     if (doTransformation) {
1780         if (transformFull) {
1781             new_bpath = nr_artpath_affine(bpath, extraPreAffine * from_2geom(sp_item_i2doc_affine(item)) * extraPostAffine);
1782         } else {
1783             new_bpath = nr_artpath_affine(bpath, extraPreAffine * item->transform * extraPostAffine);
1784         }
1785     } else {
1786         new_bpath = nr_artpath_affine(bpath, extraPreAffine * NR::identity() * extraPostAffine);
1787     }
1788
1789     g_free(bpath);
1790     return new_bpath;
1791 }
1792
1793 /*
1794  * NOTE: Returns empty pathvector if curve == NULL
1795  * TODO: see if calling this method can be optimized. All the pathvector copying might be slow.
1796  */
1797 Geom::PathVector
1798 pathvector_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull)
1799 {
1800     if (curve == NULL)
1801         return Geom::PathVector();
1802
1803     if (doTransformation) {
1804         if (transformFull) {
1805             return (curve->get_pathvector()) * sp_item_i2doc_affine(item);
1806         } else {
1807             return (curve->get_pathvector()) * to_2geom(item->transform);
1808         }
1809     } else {
1810         return curve->get_pathvector();
1811     }
1812 }
1813
1814 SPCurve* curve_for_item(SPItem *item)
1815 {
1816     if (!item) {
1817         return NULL;
1818     }
1819
1820     SPCurve *curve = NULL;
1821     if (SP_IS_SHAPE(item)) {
1822         if (SP_IS_PATH(item)) {
1823                 curve = sp_path_get_curve_for_edit(SP_PATH(item));
1824         } else {
1825             curve = sp_shape_get_curve(SP_SHAPE(item));
1826         }
1827     }
1828     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item))
1829     {
1830         curve = te_get_layout(item)->convertToCurves();
1831     }
1832     else if (SP_IS_IMAGE(item))
1833     {
1834         curve = sp_image_get_curve(SP_IMAGE(item));
1835     }
1836
1837     return curve; // do not forget to unref the curve at some point!
1838 }
1839
1840 Path *bpath_to_Path(NArtBpath const *bpath) {
1841     Path *dest = new Path;
1842     dest->SetBackData(false);
1843     {
1844         int   i;
1845         bool  closed = false;
1846         float lastX  = 0.0;
1847         float lastY  = 0.0;
1848
1849         for (i = 0; bpath[i].code != NR_END; i++) {
1850             switch (bpath[i].code) {
1851                 case NR_LINETO:
1852                     lastX = bpath[i].x3;
1853                     lastY = bpath[i].y3;
1854                     {
1855                         NR::Point tmp(lastX, lastY);
1856                         dest->LineTo(tmp);
1857                     }
1858                     break;
1859
1860                 case NR_CURVETO:
1861                 {
1862                     NR::Point tmp, tms, tme;
1863                     tmp[0]=bpath[i].x3;
1864                     tmp[1]=bpath[i].y3;
1865                     tms[0]=3 * (bpath[i].x1 - lastX);
1866                     tms[1]=3 * (bpath[i].y1 - lastY);
1867                     tme[0]=3 * (bpath[i].x3 - bpath[i].x2);
1868                     tme[1]=3 * (bpath[i].y3 - bpath[i].y2);
1869                     dest->CubicTo(tmp,tms,tme);
1870                 }
1871                 lastX = bpath[i].x3;
1872                 lastY = bpath[i].y3;
1873                 break;
1874
1875                 case NR_MOVETO_OPEN:
1876                 case NR_MOVETO:
1877                     if (closed)
1878                         dest->Close();
1879                     closed = (bpath[i].code == NR_MOVETO);
1880                     lastX = bpath[i].x3;
1881                     lastY = bpath[i].y3;
1882                     {
1883                         NR::Point  tmp(lastX, lastY);
1884                         dest->MoveTo(tmp);
1885                     }
1886                     break;
1887                 default:
1888                     break;
1889             }
1890         }
1891         if (closed)
1892             dest->Close();
1893     }
1894     return dest;
1895 }
1896
1897 NR::Maybe<Path::cut_position> get_nearest_position_on_Path(Path *path, NR::Point p, unsigned seg)
1898 {
1899     //get nearest position on path
1900     Path::cut_position pos = path->PointToCurvilignPosition(p, seg);
1901     return pos;
1902 }
1903
1904 NR::Point get_point_on_Path(Path *path, int piece, double t)
1905 {
1906     NR::Point p;
1907     path->PointAt(piece, t, p);
1908     return p;
1909 }
1910
1911
1912 /*
1913   Local Variables:
1914   mode:c++
1915   c-file-style:"stroustrup"
1916   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1917   indent-tabs-mode:nil
1918   fill-column:99
1919   End:
1920 */
1921 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :