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
  58 #include "livarot/Path.h"
  59 #include "livarot/Shape.h"
  60
  61 #include "splivarot.h"
  62
  63 bool   Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who);
  64
  65 void sp_selected_path_boolop(bool_op bop, const unsigned int verb=SP_VERB_NONE, const Glib::ustring description="");
  66 void sp_selected_path_do_offset(bool expand, double prefOffset);
  67 void sp_selected_path_create_offset_object(int expand, bool updating);
  68
  69 void
  70 sp_selected_path_union()
  71 {
  72     sp_selected_path_boolop(bool_op_union, SP_VERB_SELECTION_UNION, _("Union"));
  73 }
  74
  75 void
  76 sp_selected_path_union_skip_undo()
  77 {
  78     sp_selected_path_boolop(bool_op_union, SP_VERB_NONE, _("Union"));
  79 }
  80
  81 void
  82 sp_selected_path_intersect()
  83 {
  84     sp_selected_path_boolop(bool_op_inters, SP_VERB_SELECTION_INTERSECT, _("Intersection"));
  85 }
  86
  87 void
  88 sp_selected_path_diff()
  89 {
  90     sp_selected_path_boolop(bool_op_diff, SP_VERB_SELECTION_DIFF, _("Difference"));
  91 }
  92
  93 void
  94 sp_selected_path_diff_skip_undo()
  95 {
  96     sp_selected_path_boolop(bool_op_diff, SP_VERB_NONE, _("Difference"));
  97 }
  98
  99 void
 100 sp_selected_path_symdiff()
 101 {
 102     sp_selected_path_boolop(bool_op_symdiff, SP_VERB_SELECTION_SYMDIFF, _("Exclusion"));
 103 }
 104 void
 105 sp_selected_path_cut()
 106 {
 107     sp_selected_path_boolop(bool_op_cut, SP_VERB_SELECTION_CUT, _("Division"));
 108 }
 109 void
 110 sp_selected_path_slice()
 111 {
 112     sp_selected_path_boolop(bool_op_slice, SP_VERB_SELECTION_SLICE,  _("Cut path"));
 113 }
 114
 115
 116 // boolean operations
 117 // take the source paths from the file, do the operation, delete the originals and add the results
 118 void
 119 sp_selected_path_boolop(bool_op bop, const unsigned int verb, const Glib::ustring description)
 120 {
 121     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 122
 123     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 124
 125     GSList *il = (GSList *) selection->itemList();
 126
 127     // allow union on a single object for the purpose of removing self overlapse (svn log, revision 13334)
 128     if ( (g_slist_length(il) < 2) && (bop != bool_op_union)) {
 129         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 2 paths</b> to perform a boolean operation."));
 130         return;
 131     }
 132     else if ( g_slist_length(il) < 1 ) {
 133         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 1 path</b> to perform a boolean union."));
 134         return;
 135     }
 136
 137     if (g_slist_length(il) > 2) {
 138         if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 139             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>exactly 2 paths</b> to perform difference, XOR, division, or path cut."));
 140             return;
 141         }
 142     }
 143
 144     // reverseOrderForOp marks whether the order of the list is the top->down order
 145     // it's only used when there are 2 objects, and for operations who need to know the
 146     // topmost object (differences, cuts)
 147     bool reverseOrderForOp = false;
 148
 149     // mettre les elements de la liste dans l'ordre pour ces operations
 150     if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice) {
 151         // check in the tree to find which element of the selection list is topmost (for 2-operand commands only)
 152         Inkscape::XML::Node *a = SP_OBJECT_REPR(il->data);
 153         Inkscape::XML::Node *b = SP_OBJECT_REPR(il->next->data);
 154
 155         if (a == NULL || b == NULL) {
 156             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."));
 157             return;
 158         }
 159
 160         if (Ancetre(a, b)) {
 161             // a is the parent of b, already in the proper order
 162         } else if (Ancetre(b, a)) {
 163             // reverse order
 164             reverseOrderForOp = true;
 165         } else {
 166
 167             // objects are not in parent/child relationship;
 168             // find their lowest common ancestor
 169             Inkscape::XML::Node *dad = LCA(a, b);
 170             if (dad == NULL) {
 171                 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."));
 172                 return;
 173             }
 174
 175             // find the children of the LCA that lead from it to the a and b
 176             Inkscape::XML::Node *as = AncetreFils(a, dad);
 177             Inkscape::XML::Node *bs = AncetreFils(b, dad);
 178
 179             // find out which comes first
 180             for (Inkscape::XML::Node *child = dad->firstChild(); child; child = child->next()) {
 181                 if (child == as) {
 182                     /* a first, so reverse. */
 183                     reverseOrderForOp = true;
 184                     break;
 185                 }
 186                 if (child == bs)
 187                     break;
 188             }
 189         }
 190     }
 191
 192     il = g_slist_copy(il);
 193
 194     // first check if all the input objects have shapes
 195     // otherwise bail out
 196     for (GSList *l = il; l != NULL; l = l->next)
 197     {
 198         SPItem *item = SP_ITEM(l->data);
 199         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item) && !SP_IS_FLOWTEXT(item))
 200         {
 201             desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("One of the objects is <b>not a path</b>, cannot perform boolean operation."));
 202             g_slist_free(il);
 203             return;
 204         }
 205     }
 206
 207     // extract the livarot Paths from the source objects
 208     // also get the winding rule specified in the style
 209     int nbOriginaux = g_slist_length(il);
 210     std::vector<Path *> originaux(nbOriginaux);
 211     std::vector<FillRule> origWind(nbOriginaux);
 212     int curOrig;
 213     {
 214         curOrig = 0;
 215         for (GSList *l = il; l != NULL; l = l->next)
 216         {
 217             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(il->data), "style");
 218             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
 219             if (val && strcmp(val, "nonzero") == 0) {
 220                 origWind[curOrig]= fill_nonZero;
 221             } else if (val && strcmp(val, "evenodd") == 0) {
 222                 origWind[curOrig]= fill_oddEven;
 223             } else {
 224                 origWind[curOrig]= fill_nonZero;
 225             }
 226
 227             originaux[curOrig] = Path_for_item((SPItem *) l->data, true, true);
 228             if (originaux[curOrig] == NULL || originaux[curOrig]->descr_cmd.size() <= 1)
 229             {
 230                 for (int i = curOrig; i >= 0; i--) delete originaux[i];
 231                 g_slist_free(il);
 232                 return;
 233             }
 234             curOrig++;
 235         }
 236     }
 237     // reverse if needed
 238     // note that the selection list keeps its order
 239     if ( reverseOrderForOp ) {
 240         Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 241         FillRule swai=origWind[0]; origWind[0]=origWind[1]; origWind[1]=swai;
 242     }
 243
 244     // and work
 245     // some temporary instances, first
 246     Shape *theShapeA = new Shape;
 247     Shape *theShapeB = new Shape;
 248     Shape *theShape = new Shape;
 249     Path *res = new Path;
 250     res->SetBackData(false);
 251     Path::cut_position  *toCut=NULL;
 252     int                  nbToCut=0;
 253
 254     if ( bop == bool_op_inters || bop == bool_op_union || bop == bool_op_diff || bop == bool_op_symdiff ) {
 255         // true boolean op
 256         // get the polygons of each path, with the winding rule specified, and apply the operation iteratively
 257         originaux[0]->ConvertWithBackData(0.1);
 258
 259         originaux[0]->Fill(theShape, 0);
 260
 261         theShapeA->ConvertToShape(theShape, origWind[0]);
 262
 263         curOrig = 1;
 264         for (GSList *l = il->next; l != NULL; l = l->next) {
 265             originaux[curOrig]->ConvertWithBackData(0.1);
 266
 267             originaux[curOrig]->Fill(theShape, curOrig);
 268
 269             theShapeB->ConvertToShape(theShape, origWind[curOrig]);
 270
 271             // les elements arrivent en ordre inverse dans la liste
 272             theShape->Booleen(theShapeB, theShapeA, bop);
 273
 274             {
 275                 Shape *swap = theShape;
 276                 theShape = theShapeA;
 277                 theShapeA = swap;
 278             }
 279             curOrig++;
 280         }
 281
 282         {
 283             Shape *swap = theShape;
 284             theShape = theShapeA;
 285             theShapeA = swap;
 286         }
 287
 288     } else if ( bop == bool_op_cut ) {
 289         // cuts= sort of a bastard boolean operation, thus not the axact same modus operandi
 290         // technically, the cut path is not necessarily a polygon (thus has no winding rule)
 291         // it is just uncrossed, and cleaned from duplicate edges and points
 292         // then it's fed to Booleen() which will uncross it against the other path
 293         // then comes the trick: each edge of the cut path is duplicated (one in each direction),
 294         // thus making a polygon. the weight of the edges of the cut are all 0, but
 295         // the Booleen need to invert the ones inside the source polygon (for the subsequent
 296         // ConvertToForme)
 297
 298         // the cut path needs to have the highest pathID in the back data
 299         // that's how the Booleen() function knows it's an edge of the cut
 300
 301         // FIXME: this gives poor results, the final paths are full of extraneous nodes. Decreasing
 302         // ConvertWithBackData parameter below simply increases the number of nodes, so for now I
 303         // left it at 1.0. Investigate replacing this by a combination of difference and
 304         // intersection of the same two paths. -- bb
 305         {
 306             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 307             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 308         }
 309         originaux[0]->ConvertWithBackData(1.0);
 310
 311         originaux[0]->Fill(theShape, 0);
 312
 313         theShapeA->ConvertToShape(theShape, origWind[0]);
 314
 315         originaux[1]->ConvertWithBackData(1.0);
 316
 317         originaux[1]->Fill(theShape, 1,false,false,false); //do not closeIfNeeded
 318
 319         theShapeB->ConvertToShape(theShape, fill_justDont); // fill_justDont doesn't computes winding numbers
 320
 321         // les elements arrivent en ordre inverse dans la liste
 322         theShape->Booleen(theShapeB, theShapeA, bool_op_cut, 1);
 323
 324     } else if ( bop == bool_op_slice ) {
 325         // slice is not really a boolean operation
 326         // you just put the 2 shapes in a single polygon, uncross it
 327         // the points where the degree is > 2 are intersections
 328         // just check it's an intersection on the path you want to cut, and keep it
 329         // the intersections you have found are then fed to ConvertPositionsToMoveTo() which will
 330         // make new subpath at each one of these positions
 331         // inversion pour l'op\8eration
 332         {
 333             Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
 334             int   swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
 335         }
 336         originaux[0]->ConvertWithBackData(1.0);
 337
 338         originaux[0]->Fill(theShapeA, 0,false,false,false); // don't closeIfNeeded
 339
 340         originaux[1]->ConvertWithBackData(1.0);
 341
 342         originaux[1]->Fill(theShapeA, 1,true,false,false);// don't closeIfNeeded and just dump in the shape, don't reset it
 343
 344         theShape->ConvertToShape(theShapeA, fill_justDont);
 345
 346         if ( theShape->hasBackData() ) {
 347             // should always be the case, but ya never know
 348             {
 349                 for (int i = 0; i < theShape->numberOfPoints(); i++) {
 350                     if ( theShape->getPoint(i).totalDegree() > 2 ) {
 351                         // possibly an intersection
 352                         // we need to check that at least one edge from the source path is incident to it
 353                         // before we declare it's an intersection
 354                         int cb = theShape->getPoint(i).incidentEdge[FIRST];
 355                         int   nbOrig=0;
 356                         int   nbOther=0;
 357                         int   piece=-1;
 358                         float t=0.0;
 359                         while ( cb >= 0 && cb < theShape->numberOfEdges() ) {
 360                             if ( theShape->ebData[cb].pathID == 0 ) {
 361                                 // the source has an edge incident to the point, get its position on the path
 362                                 piece=theShape->ebData[cb].pieceID;
 363                                 if ( theShape->getEdge(cb).st == i ) {
 364                                     t=theShape->ebData[cb].tSt;
 365                                 } else {
 366                                     t=theShape->ebData[cb].tEn;
 367                                 }
 368                                 nbOrig++;
 369                             }
 370                             if ( theShape->ebData[cb].pathID == 1 ) nbOther++; // the cut is incident to this point
 371                             cb=theShape->NextAt(i, cb);
 372                         }
 373                         if ( nbOrig > 0 && nbOther > 0 ) {
 374                             // point incident to both path and cut: an intersection
 375                             // note that you only keep one position on the source; you could have degenerate
 376                             // cases where the source crosses itself at this point, and you wouyld miss an intersection
 377                             toCut=(Path::cut_position*)realloc(toCut, (nbToCut+1)*sizeof(Path::cut_position));
 378                             toCut[nbToCut].piece=piece;
 379                             toCut[nbToCut].t=t;
 380                             nbToCut++;
 381                         }
 382                     }
 383                 }
 384             }
 385             {
 386                 // i think it's useless now
 387                 int i = theShape->numberOfEdges() - 1;
 388                 for (;i>=0;i--) {
 389                     if ( theShape->ebData[i].pathID == 1 ) {
 390                         theShape->SubEdge(i);
 391                     }
 392                 }
 393             }
 394
 395         }
 396     }
 397
 398     int*    nesting=NULL;
 399     int*    conts=NULL;
 400     int     nbNest=0;
 401     // pour compenser le swap juste avant
 402     if ( bop == bool_op_slice ) {
 403 //    theShape->ConvertToForme(res, nbOriginaux, originaux, true);
 404 //    res->ConvertForcedToMoveTo();
 405         res->Copy(originaux[0]);
 406         res->ConvertPositionsToMoveTo(nbToCut, toCut); // cut where you found intersections
 407         free(toCut);
 408     } else if ( bop == bool_op_cut ) {
 409         // il faut appeler pour desallouer PointData (pas vital, mais bon)
 410         // the Booleen() function did not deallocated the point_data array in theShape, because this
 411         // function needs it.
 412         // this function uses the point_data to get the winding number of each path (ie: is a hole or not)
 413         // for later reconstruction in objects, you also need to extract which path is parent of holes (nesting info)
 414         theShape->ConvertToFormeNested(res, nbOriginaux, &originaux[0], 1, nbNest, nesting, conts);
 415     } else {
 416         theShape->ConvertToForme(res, nbOriginaux, &originaux[0]);
 417     }
 418
 419     delete theShape;
 420     delete theShapeA;
 421     delete theShapeB;
 422     for (int i = 0; i < nbOriginaux; i++)  delete originaux[i];
 423
 424     if (res->descr_cmd.size() <= 1)
 425     {
 426         // only one command, presumably a moveto: it isn't a path
 427         for (GSList *l = il; l != NULL; l = l->next)
 428         {
 429             SP_OBJECT(l->data)->deleteObject();
 430         }
 431         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 432                          description);
 433         selection->clear();
 434
 435         delete res;
 436         g_slist_free(il);
 437         return;
 438     }
 439
 440     // get the source path object
 441     SPObject *source;
 442     if ( bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
 443         if (reverseOrderForOp) {
 444              source = SP_OBJECT(il->data);
 445         } else {
 446              source = SP_OBJECT(il->next->data);
 447         }
 448     } else {
 449         // find out the bottom object
 450         GSList *sorted = g_slist_copy((GSList *) selection->reprList());
 451
 452         sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
 453
 454         source = sp_desktop_document(desktop)->
 455             getObjectByRepr((Inkscape::XML::Node *)sorted->data);
 456
 457         g_slist_free(sorted);
 458     }
 459
 460     // adjust style properties that depend on a possible transform in the source object in order
 461     // to get a correct style attribute for the new path
 462     SPItem* item_source = SP_ITEM(source);
 463     NR::Matrix i2root = from_2geom(sp_item_i2root_affine(item_source));
 464     sp_item_adjust_stroke(item_source, NR::expansion(i2root));
 465     sp_item_adjust_pattern(item_source, i2root);
 466     sp_item_adjust_gradient(item_source, i2root);
 467     sp_item_adjust_livepatheffect(item_source, i2root);
 468
 469     Inkscape::XML::Node *repr_source = SP_OBJECT_REPR(source);
 470
 471     // remember important aspects of the source path, to be restored
 472     gint pos = repr_source->position();
 473     Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
 474     gchar const *id = repr_source->attribute("id");
 475     gchar const *style = repr_source->attribute("style");
 476     gchar const *mask = repr_source->attribute("mask");
 477     gchar const *clip_path = repr_source->attribute("clip-path");
 478
 479     // remove source paths
 480     selection->clear();
 481     for (GSList *l = il; l != NULL; l = l->next) {
 482         // if this is the bottommost object,
 483         if (!strcmp(SP_OBJECT_REPR(l->data)->attribute("id"), id)) {
 484             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 485             SP_OBJECT(l->data)->deleteObject(false);
 486         } else {
 487             // delete the object for real, so that its clones can take appropriate action
 488             SP_OBJECT(l->data)->deleteObject();
 489         }
 490     }
 491     g_slist_free(il);
 492
 493     // premultiply by the inverse of parent's repr
 494     SPItem *parent_item = SP_ITEM(sp_desktop_document(desktop)->getObjectByRepr(parent));
 495     NR::Matrix local = from_2geom(sp_item_i2doc_affine(parent_item));
 496     gchar *transform = sp_svg_transform_write(local.inverse());
 497
 498     // now that we have the result, add it on the canvas
 499     if ( bop == bool_op_cut || bop == bool_op_slice ) {
 500         int    nbRP=0;
 501         Path** resPath;
 502         if ( bop == bool_op_slice ) {
 503             // there are moveto's at each intersection, but it's still one unique path
 504             // so break it down and add each subpath independently
 505             // we could call break_apart to do this, but while we have the description...
 506             resPath=res->SubPaths(nbRP, false);
 507         } else {
 508             // cut operation is a bit wicked: you need to keep holes
 509             // that's why you needed the nesting
 510             // ConvertToFormeNested() dumped all the subpath in a single Path "res", so we need
 511             // to get the path for each part of the polygon. that's why you need the nesting info:
 512             // to know in wich subpath to add a subpath
 513             resPath=res->SubPathsWithNesting(nbRP, true, nbNest, nesting, conts);
 514
 515             // cleaning
 516             if ( conts ) free(conts);
 517             if ( nesting ) free(nesting);
 518         }
 519
 520         // add all the pieces resulting from cut or slice
 521         for (int i=0;i<nbRP;i++) {
 522             gchar *d = resPath[i]->svg_dump_path();
 523
 524             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 525             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 526             repr->setAttribute("style", style);
 527             if (mask)
 528                 repr->setAttribute("mask", mask);
 529             if (clip_path)
 530                 repr->setAttribute("clip-path", clip_path);
 531
 532             repr->setAttribute("d", d);
 533             g_free(d);
 534
 535             // for slice, remove fill
 536             if (bop == bool_op_slice) {
 537                 SPCSSAttr *css;
 538
 539                 css = sp_repr_css_attr_new();
 540                 sp_repr_css_set_property(css, "fill", "none");
 541
 542                 sp_repr_css_change(repr, css, "style");
 543
 544                 sp_repr_css_attr_unref(css);
 545             }
 546
 547             // we assign the same id on all pieces, but it on adding to document, it will be changed on all except one
 548             // this means it's basically random which of the pieces inherits the original's id and clones
 549             // a better algorithm might figure out e.g. the biggest piece
 550             repr->setAttribute("id", id);
 551
 552             repr->setAttribute("transform", transform);
 553
 554             // add the new repr to the parent
 555             parent->appendChild(repr);
 556
 557             // move to the saved position
 558             repr->setPosition(pos > 0 ? pos : 0);
 559
 560             selection->add(repr);
 561             Inkscape::GC::release(repr);
 562
 563             delete resPath[i];
 564         }
 565         if ( resPath ) free(resPath);
 566
 567     } else {
 568         gchar *d = res->svg_dump_path();
 569
 570         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 571         Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 572         repr->setAttribute("style", style);
 573
 574         if ( mask )
 575             repr->setAttribute("mask", mask);
 576
 577         if ( clip_path )
 578             repr->setAttribute("clip-path", clip_path);
 579
 580         repr->setAttribute("d", d);
 581         g_free(d);
 582
 583         repr->setAttribute("transform", transform);
 584
 585         repr->setAttribute("id", id);
 586         parent->appendChild(repr);
 587         repr->setPosition(pos > 0 ? pos : 0);
 588
 589         selection->add(repr);
 590         Inkscape::GC::release(repr);
 591     }
 592
 593     g_free(transform);
 594
 595     if (verb != SP_VERB_NONE) {
 596         sp_document_done(sp_desktop_document(desktop), verb, description);
 597     }
 598
 599     delete res;
 600 }
 601
 602 static
 603 void sp_selected_path_outline_add_marker( SPObject *marker_object, Geom::Matrix marker_transform, NR::scale stroke_scale, NR::Matrix transform,
 604                                        Inkscape::XML::Node *g_repr, Inkscape::XML::Document *xml_doc, SPDocument * doc )
 605 {
 606     SPMarker* marker = SP_MARKER (marker_object);
 607     SPItem* marker_item = sp_item_first_item_child (SP_OBJECT (marker_object));
 608
 609     NR::Matrix tr(from_2geom(marker_transform));
 610
 611     if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
 612         tr = stroke_scale * tr;
 613     }
 614
 615     // total marker transform
 616     tr = marker_item->transform * marker->c2p * tr * transform;
 617
 618     if (SP_OBJECT_REPR(marker_item)) {
 619         Inkscape::XML::Node *m_repr = SP_OBJECT_REPR(marker_item)->duplicate(xml_doc);
 620         g_repr->appendChild(m_repr);
 621         SPItem *marker_item = (SPItem *) doc->getObjectByRepr(m_repr);
 622         sp_item_write_transform(marker_item, m_repr, tr);
 623     }
 624 }
 625
 626 void
 627 sp_selected_path_outline()
 628 {
 629     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 630
 631     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 632
 633     if (selection->isEmpty()) {
 634         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>stroked path(s)</b> to convert stroke to path."));
 635         return;
 636     }
 637
 638     bool did = false;
 639
 640     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 641          items != NULL;
 642          items = items->next) {
 643
 644         SPItem *item = (SPItem *) items->data;
 645
 646         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
 647             continue;
 648
 649         SPCurve *curve = NULL;
 650         if (SP_IS_SHAPE(item)) {
 651             curve = sp_shape_get_curve(SP_SHAPE(item));
 652             if (curve == NULL)
 653                 continue;
 654         }
 655         if (SP_IS_TEXT(item)) {
 656             curve = SP_TEXT(item)->getNormalizedBpath();
 657             if (curve == NULL)
 658                 continue;
 659         }
 660
 661         // pas de stroke pas de chocolat
 662         if (!SP_OBJECT_STYLE(item) || SP_OBJECT_STYLE(item)->stroke.noneSet) {
 663             curve->unref();
 664             continue;
 665         }
 666
 667         // remember old stroke style, to be set on fill
 668         SPStyle *i_style = SP_OBJECT_STYLE(item);
 669         SPCSSAttr *ncss;
 670         {
 671             ncss = sp_css_attr_from_style(i_style, SP_STYLE_FLAG_ALWAYS);
 672             gchar const *s_val = sp_repr_css_property(ncss, "stroke", NULL);
 673             gchar const *s_opac = sp_repr_css_property(ncss, "stroke-opacity", NULL);
 674
 675             sp_repr_css_set_property(ncss, "stroke", "none");
 676             sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
 677             sp_repr_css_set_property(ncss, "fill", s_val);
 678             if ( s_opac ) {
 679                 sp_repr_css_set_property(ncss, "fill-opacity", s_opac);
 680             } else {
 681                 sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
 682             }
 683             sp_repr_css_unset_property(ncss, "marker-start");
 684             sp_repr_css_unset_property(ncss, "marker-mid");
 685             sp_repr_css_unset_property(ncss, "marker-end");
 686         }
 687
 688         NR::Matrix const transform(item->transform);
 689         float const scale = NR::expansion(transform);
 690         gchar const *mask = SP_OBJECT_REPR(item)->attribute("mask");
 691         gchar const *clip_path = SP_OBJECT_REPR(item)->attribute("clip-path");
 692
 693         float o_width, o_miter;
 694         JoinType o_join;
 695         ButtType o_butt;
 696
 697         {
 698             int jointype, captype;
 699
 700             jointype = i_style->stroke_linejoin.computed;
 701             captype = i_style->stroke_linecap.computed;
 702             o_width = i_style->stroke_width.computed;
 703
 704             switch (jointype) {
 705                 case SP_STROKE_LINEJOIN_MITER:
 706                     o_join = join_pointy;
 707                     break;
 708                 case SP_STROKE_LINEJOIN_ROUND:
 709                     o_join = join_round;
 710                     break;
 711                 default:
 712                     o_join = join_straight;
 713                     break;
 714             }
 715
 716             switch (captype) {
 717                 case SP_STROKE_LINECAP_SQUARE:
 718                     o_butt = butt_square;
 719                     break;
 720                 case SP_STROKE_LINECAP_ROUND:
 721                     o_butt = butt_round;
 722                     break;
 723                 default:
 724                     o_butt = butt_straight;
 725                     break;
 726             }
 727
 728             if (o_width < 0.1)
 729                 o_width = 0.1;
 730             o_miter = i_style->stroke_miterlimit.value * o_width;
 731         }
 732
 733         Path *orig = Path_for_item(item, false);
 734         if (orig == NULL) {
 735             curve->unref();
 736             continue;
 737         }
 738
 739         Path *res = new Path;
 740         res->SetBackData(false);
 741
 742         if (i_style->stroke_dash.n_dash) {
 743             // For dashed strokes, use Stroke method, because Outline can't do dashes
 744             // However Stroke adds lots of extra nodes _or_ makes the path crooked, so consider this a temporary workaround
 745
 746             orig->ConvertWithBackData(0.1);
 747
 748             orig->DashPolylineFromStyle(i_style, scale, 0);
 749
 750             Shape* theShape = new Shape;
 751             orig->Stroke(theShape, false, 0.5*o_width, o_join, o_butt,
 752                          0.5 * o_miter);
 753             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 754
 755             Shape *theRes = new Shape;
 756
 757             theRes->ConvertToShape(theShape, fill_positive);
 758
 759             Path *originaux[1];
 760             originaux[0] = res;
 761             theRes->ConvertToForme(orig, 1, originaux);
 762
 763             res->Coalesce(5.0);
 764
 765             delete theShape;
 766             delete theRes;
 767
 768         } else {
 769
 770             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 771
 772             orig->Coalesce(0.5 * o_width);
 773
 774             Shape *theShape = new Shape;
 775             Shape *theRes = new Shape;
 776
 777             res->ConvertWithBackData(1.0);
 778             res->Fill(theShape, 0);
 779             theRes->ConvertToShape(theShape, fill_positive);
 780
 781             Path *originaux[1];
 782             originaux[0] = res;
 783             theRes->ConvertToForme(orig, 1, originaux);
 784
 785             delete theShape;
 786             delete theRes;
 787         }
 788
 789         if (orig->descr_cmd.size() <= 1) {
 790             // ca a merd\8e, ou bien le resultat est vide
 791             delete res;
 792             delete orig;
 793             continue;
 794         }
 795
 796         did = true;
 797
 798         // remember the position of the item
 799         gint pos = SP_OBJECT_REPR(item)->position();
 800         // remember parent
 801         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 802         // remember id
 803         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 804
 805         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
 806
 807             SPDocument * doc = sp_desktop_document(desktop);
 808             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 809             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 810
 811             // restore old style, but set old stroke style on fill
 812             sp_repr_css_change(repr, ncss, "style");
 813
 814             sp_repr_css_attr_unref(ncss);
 815
 816             gchar *str = orig->svg_dump_path();
 817             repr->setAttribute("d", str);
 818             g_free(str);
 819
 820             if (mask)
 821                 repr->setAttribute("mask", mask);
 822             if (clip_path)
 823                 repr->setAttribute("clip-path", clip_path);
 824
 825             if (SP_IS_SHAPE(item) && sp_shape_has_markers (SP_SHAPE(item))) {
 826
 827                 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 828                 Inkscape::XML::Node *g_repr = xml_doc->createElement("svg:g");
 829
 830                 // add the group to the parent
 831                 parent->appendChild(g_repr);
 832                 // move to the saved position
 833                 g_repr->setPosition(pos > 0 ? pos : 0);
 834
 835                 g_repr->appendChild(repr);
 836                 repr->setAttribute("id", id);
 837                 SPItem *newitem = (SPItem *) doc->getObjectByRepr(repr);
 838                 sp_item_write_transform(newitem, repr, transform);
 839
 840                 SPShape *shape = SP_SHAPE(item);
 841
 842                 Geom::PathVector const & pathv = curve->get_pathvector();
 843                 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
 844                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_START] ) {
 845                         Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
 846                         sp_selected_path_outline_add_marker( marker_obj, m,
 847                                                              NR::scale(i_style->stroke_width.computed), transform,
 848                                                              g_repr, xml_doc, doc );
 849                     }
 850
 851                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_MID] ) {
 852                         Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
 853                         Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
 854                         while (curve_it2 != path_it->end_default())
 855                         {
 856                             /* Put marker between curve_it1 and curve_it2.
 857                              * Loop to end_default (so including closing segment), because when a path is closed,
 858                              * there should be a midpoint marker between last segment and closing straight line segment
 859                              */
 860                             Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
 861                             sp_selected_path_outline_add_marker( marker_obj, m,
 862                                                                  NR::scale(i_style->stroke_width.computed), transform,
 863                                                                  g_repr, xml_doc, doc );
 864
 865                             ++curve_it1;
 866                             ++curve_it2;
 867                         }
 868                     }
 869
 870                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_END] ) {
 871                         Geom::Matrix const m (sp_shape_marker_get_transform_at_end(path_it->back_default()));
 872                         sp_selected_path_outline_add_marker( marker_obj, m,
 873                                                              NR::scale(i_style->stroke_width.computed), transform,
 874                                                              g_repr, xml_doc, doc );
 875                     }
 876                 }
 877
 878                 selection->add(g_repr);
 879
 880                 Inkscape::GC::release(g_repr);
 881
 882
 883             } else {
 884
 885                 // add the new repr to the parent
 886                 parent->appendChild(repr);
 887
 888                 // move to the saved position
 889                 repr->setPosition(pos > 0 ? pos : 0);
 890
 891                 repr->setAttribute("id", id);
 892
 893                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 894                 sp_item_write_transform(newitem, repr, transform);
 895
 896                 selection->add(repr);
 897
 898             }
 899
 900             Inkscape::GC::release(repr);
 901
 902             curve->unref();
 903             selection->remove(item);
 904             SP_OBJECT(item)->deleteObject(false);
 905
 906         }
 907
 908         delete res;
 909         delete orig;
 910     }
 911
 912     if (did) {
 913         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_OUTLINE,
 914                          _("Convert stroke to path"));
 915     } else {
 916         // TRANSLATORS: "to outline" means "to convert stroke to path"
 917         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> in the selection."));
 918         return;
 919     }
 920 }
 921
 922
 923 void
 924 sp_selected_path_offset()
 925 {
 926     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 927
 928     sp_selected_path_do_offset(true, prefOffset);
 929 }
 930 void
 931 sp_selected_path_inset()
 932 {
 933     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 934
 935     sp_selected_path_do_offset(false, prefOffset);
 936 }
 937
 938 void
 939 sp_selected_path_offset_screen(double pixels)
 940 {
 941     sp_selected_path_do_offset(true,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 942 }
 943
 944 void
 945 sp_selected_path_inset_screen(double pixels)
 946 {
 947     sp_selected_path_do_offset(false,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 948 }
 949
 950
 951 void sp_selected_path_create_offset_object_zero()
 952 {
 953     sp_selected_path_create_offset_object(0, false);
 954 }
 955
 956 void sp_selected_path_create_offset()
 957 {
 958     sp_selected_path_create_offset_object(1, false);
 959 }
 960 void sp_selected_path_create_inset()
 961 {
 962     sp_selected_path_create_offset_object(-1, false);
 963 }
 964
 965 void sp_selected_path_create_updating_offset_object_zero()
 966 {
 967     sp_selected_path_create_offset_object(0, true);
 968 }
 969
 970 void sp_selected_path_create_updating_offset()
 971 {
 972     sp_selected_path_create_offset_object(1, true);
 973 }
 974 void sp_selected_path_create_updating_inset()
 975 {
 976     sp_selected_path_create_offset_object(-1, true);
 977 }
 978
 979 void
 980 sp_selected_path_create_offset_object(int expand, bool updating)
 981 {
 982     Inkscape::Selection *selection;
 983     Inkscape::XML::Node *repr;
 984     SPItem *item;
 985     SPCurve *curve;
 986     gchar *style, *str;
 987     SPDesktop *desktop;
 988     float o_width, o_miter;
 989     JoinType o_join;
 990     ButtType o_butt;
 991
 992     curve = NULL;
 993
 994     desktop = SP_ACTIVE_DESKTOP;
 995
 996     selection = sp_desktop_selection(desktop);
 997
 998     item = selection->singleItem();
 999
1000     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
1001         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
1002         return;
1003     }
1004     if (SP_IS_SHAPE(item))
1005     {
1006         curve = sp_shape_get_curve(SP_SHAPE(item));
1007         if (curve == NULL)
1008             return;
1009     }
1010     if (SP_IS_TEXT(item))
1011     {
1012         curve = SP_TEXT(item)->getNormalizedBpath();
1013         if (curve == NULL)
1014             return;
1015     }
1016
1017     NR::Matrix const transform(item->transform);
1018
1019     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1020
1021     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
1022
1023     // remember the position of the item
1024     gint pos = SP_OBJECT_REPR(item)->position();
1025     // remember parent
1026     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1027
1028     {
1029         SPStyle *i_style = SP_OBJECT(item)->style;
1030         int jointype, captype;
1031
1032         jointype = i_style->stroke_linejoin.value;
1033         captype = i_style->stroke_linecap.value;
1034         o_width = i_style->stroke_width.computed;
1035         if (jointype == SP_STROKE_LINEJOIN_MITER)
1036         {
1037             o_join = join_pointy;
1038         }
1039         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
1040         {
1041             o_join = join_round;
1042         }
1043         else
1044         {
1045             o_join = join_straight;
1046         }
1047         if (captype == SP_STROKE_LINECAP_SQUARE)
1048         {
1049             o_butt = butt_square;
1050         }
1051         else if (captype == SP_STROKE_LINECAP_ROUND)
1052         {
1053             o_butt = butt_round;
1054         }
1055         else
1056         {
1057             o_butt = butt_straight;
1058         }
1059
1060         {
1061             double prefOffset = 1.0;
1062             prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", prefOffset);
1063             o_width = prefOffset;
1064         }
1065
1066         if (o_width < 0.01)
1067             o_width = 0.01;
1068         o_miter = i_style->stroke_miterlimit.value * o_width;
1069     }
1070
1071     Path *orig = Path_for_item(item, true, false);
1072     if (orig == NULL)
1073     {
1074         g_free(style);
1075         curve->unref();
1076         return;
1077     }
1078
1079     Path *res = new Path;
1080     res->SetBackData(false);
1081
1082     {
1083         Shape *theShape = new Shape;
1084         Shape *theRes = new Shape;
1085
1086         orig->ConvertWithBackData(1.0);
1087         orig->Fill(theShape, 0);
1088
1089         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1090         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1091         if (val && strcmp(val, "nonzero") == 0)
1092         {
1093             theRes->ConvertToShape(theShape, fill_nonZero);
1094         }
1095         else if (val && strcmp(val, "evenodd") == 0)
1096         {
1097             theRes->ConvertToShape(theShape, fill_oddEven);
1098         }
1099         else
1100         {
1101             theRes->ConvertToShape(theShape, fill_nonZero);
1102         }
1103
1104         Path *originaux[1];
1105         originaux[0] = orig;
1106         theRes->ConvertToForme(res, 1, originaux);
1107
1108         delete theShape;
1109         delete theRes;
1110     }
1111
1112     curve->unref();
1113
1114     if (res->descr_cmd.size() <= 1)
1115     {
1116         // pas vraiment de points sur le resultat
1117         // donc il ne reste rien
1118         sp_document_done(sp_desktop_document(desktop),
1119                          (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1120                           : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1121                          (updating ? _("Create linked offset")
1122                           : _("Create dynamic offset")));
1123         selection->clear();
1124
1125         delete res;
1126         delete orig;
1127         g_free(style);
1128         return;
1129     }
1130
1131     {
1132         gchar tstr[80];
1133
1134         tstr[79] = '\0';
1135
1136         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1137         repr = xml_doc->createElement("svg:path");
1138         repr->setAttribute("sodipodi:type", "inkscape:offset");
1139         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1140                                                           ? o_width
1141                                                           : expand < 0
1142                                                           ? -o_width
1143                                                           : 0 ));
1144
1145         str = res->svg_dump_path();
1146         repr->setAttribute("inkscape:original", str);
1147         g_free(str);
1148
1149         if ( updating ) {
1150             char const *id = SP_OBJECT(item)->repr->attribute("id");
1151             char const *uri = g_strdup_printf("#%s", id);
1152             repr->setAttribute("xlink:href", uri);
1153             g_free((void *) uri);
1154         } else {
1155             repr->setAttribute("inkscape:href", NULL);
1156         }
1157
1158         repr->setAttribute("style", style);
1159
1160         // add the new repr to the parent
1161         parent->appendChild(repr);
1162
1163         // move to the saved position
1164         repr->setPosition(pos > 0 ? pos : 0);
1165
1166         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1167
1168         if ( updating ) {
1169             // on conserve l'original
1170             // we reapply the transform to the original (offset will feel it)
1171             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1172         } else {
1173             // delete original, apply the transform to the offset
1174             SP_OBJECT(item)->deleteObject(false);
1175             sp_item_write_transform(nitem, repr, transform);
1176         }
1177
1178         // The object just created from a temporary repr is only a seed.
1179         // We need to invoke its write which will update its real repr (in particular adding d=)
1180         SP_OBJECT(nitem)->updateRepr();
1181
1182         Inkscape::GC::release(repr);
1183
1184         selection->set(nitem);
1185     }
1186
1187     sp_document_done(sp_desktop_document(desktop),
1188                      (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1189                       : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1190                      (updating ? _("Create linked offset")
1191                       : _("Create dynamic offset")));
1192
1193     delete res;
1194     delete orig;
1195
1196     g_free(style);
1197 }
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210 void
1211 sp_selected_path_do_offset(bool expand, double prefOffset)
1212 {
1213     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1214
1215     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1216
1217     if (selection->isEmpty()) {
1218         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1219         return;
1220     }
1221
1222     bool did = false;
1223
1224     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1225          items != NULL;
1226          items = items->next) {
1227
1228         SPItem *item = (SPItem *) items->data;
1229
1230         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1231             continue;
1232
1233         SPCurve *curve = NULL;
1234         if (SP_IS_SHAPE(item)) {
1235             curve = sp_shape_get_curve(SP_SHAPE(item));
1236             if (curve == NULL)
1237                 continue;
1238         }
1239         if (SP_IS_TEXT(item)) {
1240             curve = SP_TEXT(item)->getNormalizedBpath();
1241             if (curve == NULL)
1242                 continue;
1243         }
1244
1245         NR::Matrix const transform(item->transform);
1246
1247         sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1248
1249         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1250
1251         float o_width, o_miter;
1252         JoinType o_join;
1253         ButtType o_butt;
1254
1255         {
1256             SPStyle *i_style = SP_OBJECT(item)->style;
1257             int jointype, captype;
1258
1259             jointype = i_style->stroke_linejoin.value;
1260             captype = i_style->stroke_linecap.value;
1261             o_width = i_style->stroke_width.computed;
1262
1263             switch (jointype) {
1264                 case SP_STROKE_LINEJOIN_MITER:
1265                     o_join = join_pointy;
1266                     break;
1267                 case SP_STROKE_LINEJOIN_ROUND:
1268                     o_join = join_round;
1269                     break;
1270                 default:
1271                     o_join = join_straight;
1272                     break;
1273             }
1274
1275             switch (captype) {
1276                 case SP_STROKE_LINECAP_SQUARE:
1277                     o_butt = butt_square;
1278                     break;
1279                 case SP_STROKE_LINECAP_ROUND:
1280                     o_butt = butt_round;
1281                     break;
1282                 default:
1283                     o_butt = butt_straight;
1284                     break;
1285             }
1286
1287             o_width = prefOffset;
1288
1289             if (o_width < 0.1)
1290                 o_width = 0.1;
1291             o_miter = i_style->stroke_miterlimit.value * o_width;
1292         }
1293
1294         Path *orig = Path_for_item(item, false);
1295         if (orig == NULL) {
1296             g_free(style);
1297             curve->unref();
1298             continue;
1299         }
1300
1301         Path *res = new Path;
1302         res->SetBackData(false);
1303
1304         {
1305             Shape *theShape = new Shape;
1306             Shape *theRes = new Shape;
1307
1308             orig->ConvertWithBackData(0.03);
1309             orig->Fill(theShape, 0);
1310
1311             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1312             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1313             if (val && strcmp(val, "nonzero") == 0)
1314             {
1315                 theRes->ConvertToShape(theShape, fill_nonZero);
1316             }
1317             else if (val && strcmp(val, "evenodd") == 0)
1318             {
1319                 theRes->ConvertToShape(theShape, fill_oddEven);
1320             }
1321             else
1322             {
1323                 theRes->ConvertToShape(theShape, fill_nonZero);
1324             }
1325
1326             // et maintenant: offset
1327             // methode inexacte
1328 /*                      Path *originaux[1];
1329                         originaux[0] = orig;
1330                         theRes->ConvertToForme(res, 1, originaux);
1331
1332                         if (expand) {
1333                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1334                         } else {
1335                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1336                         }
1337
1338                         orig->ConvertWithBackData(1.0);
1339                         orig->Fill(theShape, 0);
1340                         theRes->ConvertToShape(theShape, fill_positive);
1341                         originaux[0] = orig;
1342                         theRes->ConvertToForme(res, 1, originaux);
1343
1344                         if (o_width >= 0.5) {
1345                         //     res->Coalesce(1.0);
1346                         res->ConvertEvenLines(1.0);
1347                         res->Simplify(1.0);
1348                         } else {
1349                         //      res->Coalesce(o_width);
1350                         res->ConvertEvenLines(1.0*o_width);
1351                         res->Simplify(1.0 * o_width);
1352                         }    */
1353             // methode par makeoffset
1354
1355             if (expand)
1356             {
1357                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1358             }
1359             else
1360             {
1361                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1362             }
1363             theRes->ConvertToShape(theShape, fill_positive);
1364
1365             res->Reset();
1366             theRes->ConvertToForme(res);
1367
1368             if (o_width >= 1.0)
1369             {
1370                 res->ConvertEvenLines(1.0);
1371                 res->Simplify(1.0);
1372             }
1373             else
1374             {
1375                 res->ConvertEvenLines(1.0*o_width);
1376                 res->Simplify(1.0 * o_width);
1377             }
1378
1379             delete theShape;
1380             delete theRes;
1381         }
1382
1383         did = true;
1384
1385         curve->unref();
1386         // remember the position of the item
1387         gint pos = SP_OBJECT_REPR(item)->position();
1388         // remember parent
1389         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1390         // remember id
1391         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1392
1393         selection->remove(item);
1394         SP_OBJECT(item)->deleteObject(false);
1395
1396         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1397
1398             gchar tstr[80];
1399
1400             tstr[79] = '\0';
1401
1402             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1403             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1404
1405             repr->setAttribute("style", style);
1406
1407             gchar *str = res->svg_dump_path();
1408             repr->setAttribute("d", str);
1409             g_free(str);
1410
1411             // add the new repr to the parent
1412             parent->appendChild(repr);
1413
1414             // move to the saved position
1415             repr->setPosition(pos > 0 ? pos : 0);
1416
1417             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1418
1419             // reapply the transform
1420             sp_item_write_transform(newitem, repr, transform);
1421
1422             repr->setAttribute("id", id);
1423
1424             selection->add(repr);
1425
1426             Inkscape::GC::release(repr);
1427         }
1428
1429         delete orig;
1430         delete res;
1431     }
1432
1433     if (did) {
1434         sp_document_done(sp_desktop_document(desktop),
1435                          (expand ? SP_VERB_SELECTION_OFFSET : SP_VERB_SELECTION_INSET),
1436                          (expand ? _("Outset path") : _("Inset path")));
1437     } else {
1438         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1439         return;
1440     }
1441 }
1442
1443
1444 static bool
1445 sp_selected_path_simplify_items(SPDesktop *desktop,
1446                                 Inkscape::Selection *selection, GSList *items,
1447                                 float threshold,  bool justCoalesce,
1448                                 float angleLimit, bool breakableAngles,
1449                                 bool modifySelection);
1450
1451
1452 //return true if we changed something, else false
1453 bool
1454 sp_selected_path_simplify_item(SPDesktop *desktop,
1455                  Inkscape::Selection *selection, SPItem *item,
1456                  float threshold,  bool justCoalesce,
1457                  float angleLimit, bool breakableAngles,
1458                  gdouble size,     bool modifySelection)
1459 {
1460     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1461         return false;
1462
1463     //If this is a group, do the children instead
1464     if (SP_IS_GROUP(item)) {
1465         GSList *items = sp_item_group_item_list(SP_GROUP(item));
1466
1467         return sp_selected_path_simplify_items(desktop, selection, items,
1468                                                threshold, justCoalesce,
1469                                                angleLimit, breakableAngles,
1470                                                false);
1471     }
1472
1473
1474     SPCurve *curve = NULL;
1475
1476     if (SP_IS_SHAPE(item)) {
1477         curve = sp_shape_get_curve(SP_SHAPE(item));
1478         if (!curve)
1479             return false;
1480     }
1481
1482     if (SP_IS_TEXT(item)) {
1483         curve = SP_TEXT(item)->getNormalizedBpath();
1484         if (!curve)
1485             return false;
1486     }
1487
1488     // save the transform, to re-apply it after simplification
1489     NR::Matrix const transform(item->transform);
1490
1491     /*
1492        reset the transform, effectively transforming the item by transform.inverse();
1493        this is necessary so that the item is transformed twice back and forth,
1494        allowing all compensations to cancel out regardless of the preferences
1495     */
1496     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1497
1498     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1499     gchar *mask = g_strdup(SP_OBJECT_REPR(item)->attribute("mask"));
1500     gchar *clip_path = g_strdup(SP_OBJECT_REPR(item)->attribute("clip-path"));
1501
1502     Path *orig = Path_for_item(item, false);
1503     if (orig == NULL) {
1504         g_free(style);
1505         curve->unref();
1506         return false;
1507     }
1508
1509     curve->unref();
1510     // remember the position of the item
1511     gint pos = SP_OBJECT_REPR(item)->position();
1512     // remember parent
1513     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1514     // remember id
1515     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1516     // remember path effect
1517     char const *patheffect = SP_OBJECT_REPR(item)->attribute("inkscape:path-effect");
1518
1519     //If a group was selected, to not change the selection list
1520     if (modifySelection)
1521         selection->remove(item);
1522
1523     SP_OBJECT(item)->deleteObject(false);
1524
1525     if ( justCoalesce ) {
1526         orig->Coalesce(threshold * size);
1527     } else {
1528         orig->ConvertEvenLines(threshold * size);
1529         orig->Simplify(threshold * size);
1530     }
1531
1532     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1533     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1534
1535     // restore style, mask and clip-path
1536     repr->setAttribute("style", style);
1537     g_free(style);
1538
1539     if ( mask ) {
1540         repr->setAttribute("mask", mask);
1541         g_free(mask);
1542     }
1543
1544     if ( clip_path ) {
1545         repr->setAttribute("clip-path", clip_path);
1546         g_free(clip_path);
1547     }
1548
1549     // path
1550     gchar *str = orig->svg_dump_path();
1551     if (patheffect)
1552         repr->setAttribute("inkscape:original-d", str);
1553     else
1554         repr->setAttribute("d", str);
1555     g_free(str);
1556
1557     // restore id
1558     repr->setAttribute("id", id);
1559
1560     // add the new repr to the parent
1561     parent->appendChild(repr);
1562
1563     // move to the saved position
1564     repr->setPosition(pos > 0 ? pos : 0);
1565
1566     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1567
1568     // reapply the transform
1569     sp_item_write_transform(newitem, repr, transform);
1570
1571     // restore path effect
1572     repr->setAttribute("inkscape:path-effect", patheffect);
1573
1574     //If we are not in a selected group
1575     if (modifySelection)
1576         selection->add(repr);
1577
1578     Inkscape::GC::release(repr);
1579
1580     // clean up
1581     if (orig) delete orig;
1582
1583     return true;
1584 }
1585
1586
1587 bool
1588 sp_selected_path_simplify_items(SPDesktop *desktop,
1589                                 Inkscape::Selection *selection, GSList *items,
1590                                 float threshold,  bool justCoalesce,
1591                                 float angleLimit, bool breakableAngles,
1592                                 bool modifySelection)
1593 {
1594   bool simplifyIndividualPaths =
1595     (bool) prefs_get_int_attribute("options.simplifyindividualpaths", "value", 0);
1596
1597   gchar *simplificationType;
1598   if (simplifyIndividualPaths) {
1599       simplificationType = _("Simplifying paths (separately):");
1600   } else {
1601       simplificationType = _("Simplifying paths:");
1602   }
1603
1604   bool didSomething = false;
1605
1606   NR::Maybe<NR::Rect> selectionBbox = selection->bounds();
1607   if (!selectionBbox) {
1608     return false;
1609   }
1610   gdouble selectionSize  = L2(selectionBbox->dimensions());
1611
1612   gdouble simplifySize  = selectionSize;
1613
1614   int pathsSimplified = 0;
1615   int totalPathCount  = g_slist_length(items);
1616
1617   // set "busy" cursor
1618   desktop->setWaitingCursor();
1619
1620   for (; items != NULL; items = items->next) {
1621       SPItem *item = (SPItem *) items->data;
1622
1623       if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1624           continue;
1625
1626       if (simplifyIndividualPaths) {
1627           NR::Maybe<NR::Rect> itemBbox = item->getBounds(from_2geom(sp_item_i2d_affine(item)));
1628           if (itemBbox) {
1629               simplifySize      = L2(itemBbox->dimensions());
1630           } else {
1631               simplifySize      = 0;
1632           }
1633       }
1634
1635       pathsSimplified++;
1636
1637       if (pathsSimplified % 20 == 0) {
1638         gchar *message = g_strdup_printf(_("%s <b>%d</b> of <b>%d</b> paths simplified..."), simplificationType, pathsSimplified, totalPathCount);
1639         desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, message);
1640       }
1641
1642       didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1643                           threshold, justCoalesce, angleLimit, breakableAngles, simplifySize, modifySelection);
1644   }
1645
1646   desktop->clearWaitingCursor();
1647
1648   if (pathsSimplified > 20) {
1649     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, g_strdup_printf(_("<b>%d</b> paths simplified."), pathsSimplified));
1650   }
1651
1652   return didSomething;
1653 }
1654
1655 void
1656 sp_selected_path_simplify_selection(float threshold, bool justCoalesce,
1657                        float angleLimit, bool breakableAngles)
1658 {
1659     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1660
1661     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1662
1663     if (selection->isEmpty()) {
1664         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1665                          _("Select <b>path(s)</b> to simplify."));
1666         return;
1667     }
1668
1669     GSList *items = g_slist_copy((GSList *) selection->itemList());
1670
1671     bool didSomething = sp_selected_path_simplify_items(desktop, selection,
1672                                                         items, threshold,
1673                                                         justCoalesce,
1674                                                         angleLimit,
1675                                                         breakableAngles, true);
1676
1677     if (didSomething)
1678         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_SIMPLIFY,
1679                          _("Simplify"));
1680     else
1681         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1682
1683 }
1684
1685
1686 // globals for keeping track of accelerated simplify
1687 static double previousTime      = 0.0;
1688 static gdouble simplifyMultiply = 1.0;
1689
1690 void
1691 sp_selected_path_simplify(void)
1692 {
1693     gdouble simplifyThreshold =
1694         prefs_get_double_attribute("options.simplifythreshold", "value", 0.003);
1695     bool simplifyJustCoalesce =
1696         (bool) prefs_get_int_attribute("options.simplifyjustcoalesce", "value", 0);
1697
1698     //Get the current time
1699     GTimeVal currentTimeVal;
1700     g_get_current_time(&currentTimeVal);
1701     double currentTime = currentTimeVal.tv_sec * 1000000 +
1702                 currentTimeVal.tv_usec;
1703
1704     //Was the previous call to this function recent? (<0.5 sec)
1705     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1706
1707         // add to the threshold 1/2 of its original value
1708         simplifyMultiply  += 0.5;
1709         simplifyThreshold *= simplifyMultiply;
1710
1711     } else {
1712         // reset to the default
1713         simplifyMultiply = 1;
1714     }
1715
1716     //remember time for next call
1717     previousTime = currentTime;
1718
1719     //g_print("%g\n", simplify_threshold);
1720
1721     //Make the actual call
1722     sp_selected_path_simplify_selection(simplifyThreshold,
1723                       simplifyJustCoalesce, 0.0, false);
1724 }
1725
1726
1727
1728 // fonctions utilitaires
1729
1730 bool
1731 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1732 {
1733     if (who == NULL || a == NULL)
1734         return false;
1735     if (who == a)
1736         return true;
1737     return Ancetre(sp_repr_parent(a), who);
1738 }
1739
1740 Path *
1741 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1742 {
1743     SPCurve *curve = curve_for_item(item);
1744     NArtBpath *bpath = bpath_for_curve(item, curve, doTransformation, transformFull, NR::identity(), NR::identity());
1745
1746     if (bpath == NULL) {
1747         return NULL;
1748     }
1749
1750     Geom::PathVector pathv = pathvector_for_curve(item, curve, doTransformation, transformFull);
1751
1752     Path *dest = new Path;
1753     dest->LoadPathVector(pathv);
1754
1755     curve->unref();
1756
1757     return dest;
1758 }
1759
1760 /*
1761  * This function always returns a new NArtBpath, the caller must g_free the returned path!
1762 */
1763 NArtBpath *
1764 bpath_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull, NR::Matrix extraPreAffine, NR::Matrix extraPostAffine)
1765 {
1766     if (curve == NULL)
1767         return NULL;
1768
1769     NArtBpath *bpath = BPath_from_2GeomPath(curve->get_pathvector());
1770     if (bpath == NULL) {
1771         return NULL;
1772     }
1773
1774     NArtBpath *new_bpath; // we will get a duplicate which has to be freed at some point!
1775     if (doTransformation) {
1776         if (transformFull) {
1777             new_bpath = nr_artpath_affine(bpath, extraPreAffine * from_2geom(sp_item_i2doc_affine(item)) * extraPostAffine);
1778         } else {
1779             new_bpath = nr_artpath_affine(bpath, extraPreAffine * item->transform * extraPostAffine);
1780         }
1781     } else {
1782         new_bpath = nr_artpath_affine(bpath, extraPreAffine * NR::identity() * extraPostAffine);
1783     }
1784
1785     g_free(bpath);
1786     return new_bpath;
1787 }
1788
1789 /*
1790  * NOTE: Returns empty pathvector if curve == NULL
1791  * TODO: see if calling this method can be optimized. All the pathvector copying might be slow.
1792  */
1793 Geom::PathVector
1794 pathvector_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull)
1795 {
1796     if (curve == NULL)
1797         return Geom::PathVector();
1798
1799     if (doTransformation) {
1800         if (transformFull) {
1801             return (curve->get_pathvector()) * sp_item_i2doc_affine(item);
1802         } else {
1803             return (curve->get_pathvector()) * to_2geom(item->transform);
1804         }
1805     } else {
1806         return curve->get_pathvector();
1807     }
1808 }
1809
1810 SPCurve* curve_for_item(SPItem *item)
1811 {
1812     if (!item) {
1813         return NULL;
1814     }
1815
1816     SPCurve *curve = NULL;
1817     if (SP_IS_SHAPE(item)) {
1818         if (SP_IS_PATH(item)) {
1819                 curve = sp_path_get_curve_for_edit(SP_PATH(item));
1820         } else {
1821             curve = sp_shape_get_curve(SP_SHAPE(item));
1822         }
1823     }
1824     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item))
1825     {
1826         curve = te_get_layout(item)->convertToCurves();
1827     }
1828     else if (SP_IS_IMAGE(item))
1829     {
1830         curve = sp_image_get_curve(SP_IMAGE(item));
1831     }
1832
1833     return curve; // do not forget to unref the curve at some point!
1834 }
1835
1836 Path *bpath_to_Path(NArtBpath const *bpath) {
1837     Path *dest = new Path;
1838     dest->SetBackData(false);
1839     {
1840         int   i;
1841         bool  closed = false;
1842         float lastX  = 0.0;
1843         float lastY  = 0.0;
1844
1845         for (i = 0; bpath[i].code != NR_END; i++) {
1846             switch (bpath[i].code) {
1847                 case NR_LINETO:
1848                     lastX = bpath[i].x3;
1849                     lastY = bpath[i].y3;
1850                     {
1851                         NR::Point tmp(lastX, lastY);
1852                         dest->LineTo(tmp);
1853                     }
1854                     break;
1855
1856                 case NR_CURVETO:
1857                 {
1858                     NR::Point tmp, tms, tme;
1859                     tmp[0]=bpath[i].x3;
1860                     tmp[1]=bpath[i].y3;
1861                     tms[0]=3 * (bpath[i].x1 - lastX);
1862                     tms[1]=3 * (bpath[i].y1 - lastY);
1863                     tme[0]=3 * (bpath[i].x3 - bpath[i].x2);
1864                     tme[1]=3 * (bpath[i].y3 - bpath[i].y2);
1865                     dest->CubicTo(tmp,tms,tme);
1866                 }
1867                 lastX = bpath[i].x3;
1868                 lastY = bpath[i].y3;
1869                 break;
1870
1871                 case NR_MOVETO_OPEN:
1872                 case NR_MOVETO:
1873                     if (closed)
1874                         dest->Close();
1875                     closed = (bpath[i].code == NR_MOVETO);
1876                     lastX = bpath[i].x3;
1877                     lastY = bpath[i].y3;
1878                     {
1879                         NR::Point  tmp(lastX, lastY);
1880                         dest->MoveTo(tmp);
1881                     }
1882                     break;
1883                 default:
1884                     break;
1885             }
1886         }
1887         if (closed)
1888             dest->Close();
1889     }
1890     return dest;
1891 }
1892
1893 NR::Maybe<Path::cut_position> get_nearest_position_on_Path(Path *path, NR::Point p, unsigned seg)
1894 {
1895     //get nearest position on path
1896     Path::cut_position pos = path->PointToCurvilignPosition(p, seg);
1897     return pos;
1898 }
1899
1900 NR::Point get_point_on_Path(Path *path, int piece, double t)
1901 {
1902     NR::Point p;
1903     path->PointAt(piece, t, p);
1904     return p;
1905 }
1906
1907
1908 /*
1909   Local Variables:
1910   mode:c++
1911   c-file-style:"stroustrup"
1912   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1913   indent-tabs-mode:nil
1914   fill-column:99
1915   End:
1916 */
1917 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :