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             SPCSSAttr *css = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 663             gchar const *val = sp_repr_css_property(css, "stroke", NULL);
 664
 665             if (val == NULL || strcmp(val, "none") == 0) {
 666                 curve->unref();
 667                 continue;
 668             }
 669         }
 670
 671         // remember old stroke style, to be set on fill
 672         SPCSSAttr *ncss;
 673         {
 674             SPCSSAttr *ocss = sp_repr_css_attr_inherited(SP_OBJECT_REPR(item), "style");
 675             gchar const *val = sp_repr_css_property(ocss, "stroke", NULL);
 676             gchar const *opac = sp_repr_css_property(ocss, "stroke-opacity", NULL);
 677
 678             ncss = sp_repr_css_attr_new();
 679
 680             sp_repr_css_set_property(ncss, "stroke", "none");
 681             sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
 682             sp_repr_css_set_property(ncss, "fill", val);
 683             if ( opac ) {
 684                 sp_repr_css_set_property(ncss, "fill-opacity", opac);
 685             } else {
 686                 sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
 687             }
 688             sp_repr_css_unset_property(ncss, "marker-start");
 689             sp_repr_css_unset_property(ncss, "marker-mid");
 690             sp_repr_css_unset_property(ncss, "marker-end");
 691         }
 692
 693         NR::Matrix const transform(item->transform);
 694         float const scale = NR::expansion(transform);
 695         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
 696         SPStyle *i_style = SP_OBJECT(item)->style;
 697         gchar const *mask = SP_OBJECT_REPR(item)->attribute("mask");
 698         gchar const *clip_path = SP_OBJECT_REPR(item)->attribute("clip-path");
 699
 700         float o_width, o_miter;
 701         JoinType o_join;
 702         ButtType o_butt;
 703
 704         {
 705             int jointype, captype;
 706
 707             jointype = i_style->stroke_linejoin.computed;
 708             captype = i_style->stroke_linecap.computed;
 709             o_width = i_style->stroke_width.computed;
 710
 711             switch (jointype) {
 712                 case SP_STROKE_LINEJOIN_MITER:
 713                     o_join = join_pointy;
 714                     break;
 715                 case SP_STROKE_LINEJOIN_ROUND:
 716                     o_join = join_round;
 717                     break;
 718                 default:
 719                     o_join = join_straight;
 720                     break;
 721             }
 722
 723             switch (captype) {
 724                 case SP_STROKE_LINECAP_SQUARE:
 725                     o_butt = butt_square;
 726                     break;
 727                 case SP_STROKE_LINECAP_ROUND:
 728                     o_butt = butt_round;
 729                     break;
 730                 default:
 731                     o_butt = butt_straight;
 732                     break;
 733             }
 734
 735             if (o_width < 0.1)
 736                 o_width = 0.1;
 737             o_miter = i_style->stroke_miterlimit.value * o_width;
 738         }
 739
 740         Path *orig = Path_for_item(item, false);
 741         if (orig == NULL) {
 742             g_free(style);
 743             curve->unref();
 744             continue;
 745         }
 746
 747         Path *res = new Path;
 748         res->SetBackData(false);
 749
 750         if (i_style->stroke_dash.n_dash) {
 751             // For dashed strokes, use Stroke method, because Outline can't do dashes
 752             // However Stroke adds lots of extra nodes _or_ makes the path crooked, so consider this a temporary workaround
 753
 754             orig->ConvertWithBackData(0.1);
 755
 756             orig->DashPolylineFromStyle(i_style, scale, 0);
 757
 758             Shape* theShape = new Shape;
 759             orig->Stroke(theShape, false, 0.5*o_width, o_join, o_butt,
 760                          0.5 * o_miter);
 761             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 762
 763             Shape *theRes = new Shape;
 764
 765             theRes->ConvertToShape(theShape, fill_positive);
 766
 767             Path *originaux[1];
 768             originaux[0] = res;
 769             theRes->ConvertToForme(orig, 1, originaux);
 770
 771             res->Coalesce(5.0);
 772
 773             delete theShape;
 774             delete theRes;
 775
 776         } else {
 777
 778             orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
 779
 780             orig->Coalesce(0.5 * o_width);
 781
 782             Shape *theShape = new Shape;
 783             Shape *theRes = new Shape;
 784
 785             res->ConvertWithBackData(1.0);
 786             res->Fill(theShape, 0);
 787             theRes->ConvertToShape(theShape, fill_positive);
 788
 789             Path *originaux[1];
 790             originaux[0] = res;
 791             theRes->ConvertToForme(orig, 1, originaux);
 792
 793             delete theShape;
 794             delete theRes;
 795         }
 796
 797         if (orig->descr_cmd.size() <= 1) {
 798             // ca a merd\8e, ou bien le resultat est vide
 799             delete res;
 800             delete orig;
 801             g_free(style);
 802             continue;
 803         }
 804
 805         did = true;
 806
 807         // remember the position of the item
 808         gint pos = SP_OBJECT_REPR(item)->position();
 809         // remember parent
 810         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 811         // remember id
 812         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 813
 814         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
 815
 816             SPDocument * doc = sp_desktop_document(desktop);
 817             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 818             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 819
 820             // restore old style
 821             repr->setAttribute("style", style);
 822
 823             // set old stroke style on fill
 824             sp_repr_css_change(repr, ncss, "style");
 825
 826             sp_repr_css_attr_unref(ncss);
 827
 828             gchar *str = orig->svg_dump_path();
 829             repr->setAttribute("d", str);
 830             g_free(str);
 831
 832             if (mask)
 833                 repr->setAttribute("mask", mask);
 834             if (clip_path)
 835                 repr->setAttribute("clip-path", clip_path);
 836
 837             if (SP_IS_SHAPE(item) && sp_shape_has_markers (SP_SHAPE(item))) {
 838
 839                 Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc);
 840                 Inkscape::XML::Node *g_repr = xml_doc->createElement("svg:g");
 841
 842                 // add the group to the parent
 843                 parent->appendChild(g_repr);
 844                 // move to the saved position
 845                 g_repr->setPosition(pos > 0 ? pos : 0);
 846
 847                 g_repr->appendChild(repr);
 848                 repr->setAttribute("id", id);
 849                 SPItem *newitem = (SPItem *) doc->getObjectByRepr(repr);
 850                 sp_item_write_transform(newitem, repr, transform);
 851
 852                 SPShape *shape = SP_SHAPE(item);
 853
 854                 Geom::PathVector const & pathv = curve->get_pathvector();
 855                 for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
 856                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_START] ) {
 857                         Geom::Matrix const m (sp_shape_marker_get_transform_at_start(path_it->front()));
 858                         sp_selected_path_outline_add_marker( marker_obj, m,
 859                                                              NR::scale(i_style->stroke_width.computed), transform,
 860                                                              g_repr, xml_doc, doc );
 861                     }
 862
 863                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_MID] ) {
 864                         Geom::Path::const_iterator curve_it1 = path_it->begin();      // incoming curve
 865                         Geom::Path::const_iterator curve_it2 = ++(path_it->begin());  // outgoing curve
 866                         while (curve_it2 != path_it->end_default())
 867                         {
 868                             /* Put marker between curve_it1 and curve_it2.
 869                              * Loop to end_default (so including closing segment), because when a path is closed,
 870                              * there should be a midpoint marker between last segment and closing straight line segment
 871                              */
 872                             Geom::Matrix const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
 873                             sp_selected_path_outline_add_marker( marker_obj, m,
 874                                                                  NR::scale(i_style->stroke_width.computed), transform,
 875                                                                  g_repr, xml_doc, doc );
 876
 877                             ++curve_it1;
 878                             ++curve_it2;
 879                         }
 880                     }
 881
 882                     if ( SPObject *marker_obj = shape->marker[SP_MARKER_LOC_END] ) {
 883                         Geom::Matrix const m (sp_shape_marker_get_transform_at_end(path_it->back_default()));
 884                         sp_selected_path_outline_add_marker( marker_obj, m,
 885                                                              NR::scale(i_style->stroke_width.computed), transform,
 886                                                              g_repr, xml_doc, doc );
 887                     }
 888                 }
 889
 890                 selection->add(g_repr);
 891
 892                 Inkscape::GC::release(g_repr);
 893
 894
 895             } else {
 896
 897                 // add the new repr to the parent
 898                 parent->appendChild(repr);
 899
 900                 // move to the saved position
 901                 repr->setPosition(pos > 0 ? pos : 0);
 902
 903                 repr->setAttribute("id", id);
 904
 905                 SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
 906                 sp_item_write_transform(newitem, repr, transform);
 907
 908                 selection->add(repr);
 909
 910             }
 911
 912             Inkscape::GC::release(repr);
 913
 914             curve->unref();
 915             selection->remove(item);
 916             SP_OBJECT(item)->deleteObject(false);
 917
 918         }
 919
 920         delete res;
 921         delete orig;
 922         g_free(style);
 923
 924     }
 925
 926     if (did) {
 927         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_OUTLINE,
 928                          _("Convert stroke to path"));
 929     } else {
 930         // TRANSLATORS: "to outline" means "to convert stroke to path"
 931         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> in the selection."));
 932         return;
 933     }
 934 }
 935
 936
 937 void
 938 sp_selected_path_offset()
 939 {
 940     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 941
 942     sp_selected_path_do_offset(true, prefOffset);
 943 }
 944 void
 945 sp_selected_path_inset()
 946 {
 947     double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
 948
 949     sp_selected_path_do_offset(false, prefOffset);
 950 }
 951
 952 void
 953 sp_selected_path_offset_screen(double pixels)
 954 {
 955     sp_selected_path_do_offset(true,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 956 }
 957
 958 void
 959 sp_selected_path_inset_screen(double pixels)
 960 {
 961     sp_selected_path_do_offset(false,  pixels / SP_ACTIVE_DESKTOP->current_zoom());
 962 }
 963
 964
 965 void sp_selected_path_create_offset_object_zero()
 966 {
 967     sp_selected_path_create_offset_object(0, false);
 968 }
 969
 970 void sp_selected_path_create_offset()
 971 {
 972     sp_selected_path_create_offset_object(1, false);
 973 }
 974 void sp_selected_path_create_inset()
 975 {
 976     sp_selected_path_create_offset_object(-1, false);
 977 }
 978
 979 void sp_selected_path_create_updating_offset_object_zero()
 980 {
 981     sp_selected_path_create_offset_object(0, true);
 982 }
 983
 984 void sp_selected_path_create_updating_offset()
 985 {
 986     sp_selected_path_create_offset_object(1, true);
 987 }
 988 void sp_selected_path_create_updating_inset()
 989 {
 990     sp_selected_path_create_offset_object(-1, true);
 991 }
 992
 993 void
 994 sp_selected_path_create_offset_object(int expand, bool updating)
 995 {
 996     Inkscape::Selection *selection;
 997     Inkscape::XML::Node *repr;
 998     SPItem *item;
 999     SPCurve *curve;
1000     gchar *style, *str;
1001     SPDesktop *desktop;
1002     float o_width, o_miter;
1003     JoinType o_join;
1004     ButtType o_butt;
1005
1006     curve = NULL;
1007
1008     desktop = SP_ACTIVE_DESKTOP;
1009
1010     selection = sp_desktop_selection(desktop);
1011
1012     item = selection->singleItem();
1013
1014     if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
1015         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
1016         return;
1017     }
1018     if (SP_IS_SHAPE(item))
1019     {
1020         curve = sp_shape_get_curve(SP_SHAPE(item));
1021         if (curve == NULL)
1022             return;
1023     }
1024     if (SP_IS_TEXT(item))
1025     {
1026         curve = SP_TEXT(item)->getNormalizedBpath();
1027         if (curve == NULL)
1028             return;
1029     }
1030
1031     NR::Matrix const transform(item->transform);
1032
1033     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1034
1035     style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
1036
1037     // remember the position of the item
1038     gint pos = SP_OBJECT_REPR(item)->position();
1039     // remember parent
1040     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1041
1042     {
1043         SPStyle *i_style = SP_OBJECT(item)->style;
1044         int jointype, captype;
1045
1046         jointype = i_style->stroke_linejoin.value;
1047         captype = i_style->stroke_linecap.value;
1048         o_width = i_style->stroke_width.computed;
1049         if (jointype == SP_STROKE_LINEJOIN_MITER)
1050         {
1051             o_join = join_pointy;
1052         }
1053         else if (jointype == SP_STROKE_LINEJOIN_ROUND)
1054         {
1055             o_join = join_round;
1056         }
1057         else
1058         {
1059             o_join = join_straight;
1060         }
1061         if (captype == SP_STROKE_LINECAP_SQUARE)
1062         {
1063             o_butt = butt_square;
1064         }
1065         else if (captype == SP_STROKE_LINECAP_ROUND)
1066         {
1067             o_butt = butt_round;
1068         }
1069         else
1070         {
1071             o_butt = butt_straight;
1072         }
1073
1074         {
1075             double prefOffset = 1.0;
1076             prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", prefOffset);
1077             o_width = prefOffset;
1078         }
1079
1080         if (o_width < 0.01)
1081             o_width = 0.01;
1082         o_miter = i_style->stroke_miterlimit.value * o_width;
1083     }
1084
1085     Path *orig = Path_for_item(item, true, false);
1086     if (orig == NULL)
1087     {
1088         g_free(style);
1089         curve->unref();
1090         return;
1091     }
1092
1093     Path *res = new Path;
1094     res->SetBackData(false);
1095
1096     {
1097         Shape *theShape = new Shape;
1098         Shape *theRes = new Shape;
1099
1100         orig->ConvertWithBackData(1.0);
1101         orig->Fill(theShape, 0);
1102
1103         SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1104         gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1105         if (val && strcmp(val, "nonzero") == 0)
1106         {
1107             theRes->ConvertToShape(theShape, fill_nonZero);
1108         }
1109         else if (val && strcmp(val, "evenodd") == 0)
1110         {
1111             theRes->ConvertToShape(theShape, fill_oddEven);
1112         }
1113         else
1114         {
1115             theRes->ConvertToShape(theShape, fill_nonZero);
1116         }
1117
1118         Path *originaux[1];
1119         originaux[0] = orig;
1120         theRes->ConvertToForme(res, 1, originaux);
1121
1122         delete theShape;
1123         delete theRes;
1124     }
1125
1126     curve->unref();
1127
1128     if (res->descr_cmd.size() <= 1)
1129     {
1130         // pas vraiment de points sur le resultat
1131         // donc il ne reste rien
1132         sp_document_done(sp_desktop_document(desktop),
1133                          (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1134                           : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1135                          (updating ? _("Create linked offset")
1136                           : _("Create dynamic offset")));
1137         selection->clear();
1138
1139         delete res;
1140         delete orig;
1141         g_free(style);
1142         return;
1143     }
1144
1145     {
1146         gchar tstr[80];
1147
1148         tstr[79] = '\0';
1149
1150         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1151         repr = xml_doc->createElement("svg:path");
1152         repr->setAttribute("sodipodi:type", "inkscape:offset");
1153         sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
1154                                                           ? o_width
1155                                                           : expand < 0
1156                                                           ? -o_width
1157                                                           : 0 ));
1158
1159         str = res->svg_dump_path();
1160         repr->setAttribute("inkscape:original", str);
1161         g_free(str);
1162
1163         if ( updating ) {
1164             char const *id = SP_OBJECT(item)->repr->attribute("id");
1165             char const *uri = g_strdup_printf("#%s", id);
1166             repr->setAttribute("xlink:href", uri);
1167             g_free((void *) uri);
1168         } else {
1169             repr->setAttribute("inkscape:href", NULL);
1170         }
1171
1172         repr->setAttribute("style", style);
1173
1174         // add the new repr to the parent
1175         parent->appendChild(repr);
1176
1177         // move to the saved position
1178         repr->setPosition(pos > 0 ? pos : 0);
1179
1180         SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1181
1182         if ( updating ) {
1183             // on conserve l'original
1184             // we reapply the transform to the original (offset will feel it)
1185             sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
1186         } else {
1187             // delete original, apply the transform to the offset
1188             SP_OBJECT(item)->deleteObject(false);
1189             sp_item_write_transform(nitem, repr, transform);
1190         }
1191
1192         // The object just created from a temporary repr is only a seed.
1193         // We need to invoke its write which will update its real repr (in particular adding d=)
1194         SP_OBJECT(nitem)->updateRepr();
1195
1196         Inkscape::GC::release(repr);
1197
1198         selection->set(nitem);
1199     }
1200
1201     sp_document_done(sp_desktop_document(desktop),
1202                      (updating ? SP_VERB_SELECTION_LINKED_OFFSET
1203                       : SP_VERB_SELECTION_DYNAMIC_OFFSET),
1204                      (updating ? _("Create linked offset")
1205                       : _("Create dynamic offset")));
1206
1207     delete res;
1208     delete orig;
1209
1210     g_free(style);
1211 }
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224 void
1225 sp_selected_path_do_offset(bool expand, double prefOffset)
1226 {
1227     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1228
1229     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1230
1231     if (selection->isEmpty()) {
1232         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
1233         return;
1234     }
1235
1236     bool did = false;
1237
1238     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
1239          items != NULL;
1240          items = items->next) {
1241
1242         SPItem *item = (SPItem *) items->data;
1243
1244         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
1245             continue;
1246
1247         SPCurve *curve = NULL;
1248         if (SP_IS_SHAPE(item)) {
1249             curve = sp_shape_get_curve(SP_SHAPE(item));
1250             if (curve == NULL)
1251                 continue;
1252         }
1253         if (SP_IS_TEXT(item)) {
1254             curve = SP_TEXT(item)->getNormalizedBpath();
1255             if (curve == NULL)
1256                 continue;
1257         }
1258
1259         NR::Matrix const transform(item->transform);
1260
1261         sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1262
1263         gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1264
1265         float o_width, o_miter;
1266         JoinType o_join;
1267         ButtType o_butt;
1268
1269         {
1270             SPStyle *i_style = SP_OBJECT(item)->style;
1271             int jointype, captype;
1272
1273             jointype = i_style->stroke_linejoin.value;
1274             captype = i_style->stroke_linecap.value;
1275             o_width = i_style->stroke_width.computed;
1276
1277             switch (jointype) {
1278                 case SP_STROKE_LINEJOIN_MITER:
1279                     o_join = join_pointy;
1280                     break;
1281                 case SP_STROKE_LINEJOIN_ROUND:
1282                     o_join = join_round;
1283                     break;
1284                 default:
1285                     o_join = join_straight;
1286                     break;
1287             }
1288
1289             switch (captype) {
1290                 case SP_STROKE_LINECAP_SQUARE:
1291                     o_butt = butt_square;
1292                     break;
1293                 case SP_STROKE_LINECAP_ROUND:
1294                     o_butt = butt_round;
1295                     break;
1296                 default:
1297                     o_butt = butt_straight;
1298                     break;
1299             }
1300
1301             o_width = prefOffset;
1302
1303             if (o_width < 0.1)
1304                 o_width = 0.1;
1305             o_miter = i_style->stroke_miterlimit.value * o_width;
1306         }
1307
1308         Path *orig = Path_for_item(item, false);
1309         if (orig == NULL) {
1310             g_free(style);
1311             curve->unref();
1312             continue;
1313         }
1314
1315         Path *res = new Path;
1316         res->SetBackData(false);
1317
1318         {
1319             Shape *theShape = new Shape;
1320             Shape *theRes = new Shape;
1321
1322             orig->ConvertWithBackData(0.03);
1323             orig->Fill(theShape, 0);
1324
1325             SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
1326             gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
1327             if (val && strcmp(val, "nonzero") == 0)
1328             {
1329                 theRes->ConvertToShape(theShape, fill_nonZero);
1330             }
1331             else if (val && strcmp(val, "evenodd") == 0)
1332             {
1333                 theRes->ConvertToShape(theShape, fill_oddEven);
1334             }
1335             else
1336             {
1337                 theRes->ConvertToShape(theShape, fill_nonZero);
1338             }
1339
1340             // et maintenant: offset
1341             // methode inexacte
1342 /*                      Path *originaux[1];
1343                         originaux[0] = orig;
1344                         theRes->ConvertToForme(res, 1, originaux);
1345
1346                         if (expand) {
1347                         res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
1348                         } else {
1349                         res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
1350                         }
1351
1352                         orig->ConvertWithBackData(1.0);
1353                         orig->Fill(theShape, 0);
1354                         theRes->ConvertToShape(theShape, fill_positive);
1355                         originaux[0] = orig;
1356                         theRes->ConvertToForme(res, 1, originaux);
1357
1358                         if (o_width >= 0.5) {
1359                         //     res->Coalesce(1.0);
1360                         res->ConvertEvenLines(1.0);
1361                         res->Simplify(1.0);
1362                         } else {
1363                         //      res->Coalesce(o_width);
1364                         res->ConvertEvenLines(1.0*o_width);
1365                         res->Simplify(1.0 * o_width);
1366                         }    */
1367             // methode par makeoffset
1368
1369             if (expand)
1370             {
1371                 theShape->MakeOffset(theRes, o_width, o_join, o_miter);
1372             }
1373             else
1374             {
1375                 theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
1376             }
1377             theRes->ConvertToShape(theShape, fill_positive);
1378
1379             res->Reset();
1380             theRes->ConvertToForme(res);
1381
1382             if (o_width >= 1.0)
1383             {
1384                 res->ConvertEvenLines(1.0);
1385                 res->Simplify(1.0);
1386             }
1387             else
1388             {
1389                 res->ConvertEvenLines(1.0*o_width);
1390                 res->Simplify(1.0 * o_width);
1391             }
1392
1393             delete theShape;
1394             delete theRes;
1395         }
1396
1397         did = true;
1398
1399         curve->unref();
1400         // remember the position of the item
1401         gint pos = SP_OBJECT_REPR(item)->position();
1402         // remember parent
1403         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1404         // remember id
1405         char const *id = SP_OBJECT_REPR(item)->attribute("id");
1406
1407         selection->remove(item);
1408         SP_OBJECT(item)->deleteObject(false);
1409
1410         if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
1411
1412             gchar tstr[80];
1413
1414             tstr[79] = '\0';
1415
1416             Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1417             Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1418
1419             repr->setAttribute("style", style);
1420
1421             gchar *str = res->svg_dump_path();
1422             repr->setAttribute("d", str);
1423             g_free(str);
1424
1425             // add the new repr to the parent
1426             parent->appendChild(repr);
1427
1428             // move to the saved position
1429             repr->setPosition(pos > 0 ? pos : 0);
1430
1431             SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1432
1433             // reapply the transform
1434             sp_item_write_transform(newitem, repr, transform);
1435
1436             repr->setAttribute("id", id);
1437
1438             selection->add(repr);
1439
1440             Inkscape::GC::release(repr);
1441         }
1442
1443         delete orig;
1444         delete res;
1445     }
1446
1447     if (did) {
1448         sp_document_done(sp_desktop_document(desktop),
1449                          (expand ? SP_VERB_SELECTION_OFFSET : SP_VERB_SELECTION_INSET),
1450                          (expand ? _("Outset path") : _("Inset path")));
1451     } else {
1452         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
1453         return;
1454     }
1455 }
1456
1457
1458 static bool
1459 sp_selected_path_simplify_items(SPDesktop *desktop,
1460                                 Inkscape::Selection *selection, GSList *items,
1461                                 float threshold,  bool justCoalesce,
1462                                 float angleLimit, bool breakableAngles,
1463                                 bool modifySelection);
1464
1465
1466 //return true if we changed something, else false
1467 bool
1468 sp_selected_path_simplify_item(SPDesktop *desktop,
1469                  Inkscape::Selection *selection, SPItem *item,
1470                  float threshold,  bool justCoalesce,
1471                  float angleLimit, bool breakableAngles,
1472                  gdouble size,     bool modifySelection)
1473 {
1474     if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1475         return false;
1476
1477     //If this is a group, do the children instead
1478     if (SP_IS_GROUP(item)) {
1479         GSList *items = sp_item_group_item_list(SP_GROUP(item));
1480
1481         return sp_selected_path_simplify_items(desktop, selection, items,
1482                                                threshold, justCoalesce,
1483                                                angleLimit, breakableAngles,
1484                                                false);
1485     }
1486
1487
1488     SPCurve *curve = NULL;
1489
1490     if (SP_IS_SHAPE(item)) {
1491         curve = sp_shape_get_curve(SP_SHAPE(item));
1492         if (!curve)
1493             return false;
1494     }
1495
1496     if (SP_IS_TEXT(item)) {
1497         curve = SP_TEXT(item)->getNormalizedBpath();
1498         if (!curve)
1499             return false;
1500     }
1501
1502     // save the transform, to re-apply it after simplification
1503     NR::Matrix const transform(item->transform);
1504
1505     /*
1506        reset the transform, effectively transforming the item by transform.inverse();
1507        this is necessary so that the item is transformed twice back and forth,
1508        allowing all compensations to cancel out regardless of the preferences
1509     */
1510     sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
1511
1512     gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
1513     gchar *mask = g_strdup(SP_OBJECT_REPR(item)->attribute("mask"));
1514     gchar *clip_path = g_strdup(SP_OBJECT_REPR(item)->attribute("clip-path"));
1515
1516     Path *orig = Path_for_item(item, false);
1517     if (orig == NULL) {
1518         g_free(style);
1519         curve->unref();
1520         return false;
1521     }
1522
1523     curve->unref();
1524     // remember the position of the item
1525     gint pos = SP_OBJECT_REPR(item)->position();
1526     // remember parent
1527     Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
1528     // remember id
1529     char const *id = SP_OBJECT_REPR(item)->attribute("id");
1530     // remember path effect
1531     char const *patheffect = SP_OBJECT_REPR(item)->attribute("inkscape:path-effect");
1532
1533     //If a group was selected, to not change the selection list
1534     if (modifySelection)
1535         selection->remove(item);
1536
1537     SP_OBJECT(item)->deleteObject(false);
1538
1539     if ( justCoalesce ) {
1540         orig->Coalesce(threshold * size);
1541     } else {
1542         orig->ConvertEvenLines(threshold * size);
1543         orig->Simplify(threshold * size);
1544     }
1545
1546     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
1547     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
1548
1549     // restore style, mask and clip-path
1550     repr->setAttribute("style", style);
1551     g_free(style);
1552
1553     if ( mask ) {
1554         repr->setAttribute("mask", mask);
1555         g_free(mask);
1556     }
1557
1558     if ( clip_path ) {
1559         repr->setAttribute("clip-path", clip_path);
1560         g_free(clip_path);
1561     }
1562
1563     // path
1564     gchar *str = orig->svg_dump_path();
1565     if (patheffect)
1566         repr->setAttribute("inkscape:original-d", str);
1567     else
1568         repr->setAttribute("d", str);
1569     g_free(str);
1570
1571     // restore id
1572     repr->setAttribute("id", id);
1573
1574     // add the new repr to the parent
1575     parent->appendChild(repr);
1576
1577     // move to the saved position
1578     repr->setPosition(pos > 0 ? pos : 0);
1579
1580     SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
1581
1582     // reapply the transform
1583     sp_item_write_transform(newitem, repr, transform);
1584
1585     // restore path effect
1586     repr->setAttribute("inkscape:path-effect", patheffect);
1587
1588     //If we are not in a selected group
1589     if (modifySelection)
1590         selection->add(repr);
1591
1592     Inkscape::GC::release(repr);
1593
1594     // clean up
1595     if (orig) delete orig;
1596
1597     return true;
1598 }
1599
1600
1601 bool
1602 sp_selected_path_simplify_items(SPDesktop *desktop,
1603                                 Inkscape::Selection *selection, GSList *items,
1604                                 float threshold,  bool justCoalesce,
1605                                 float angleLimit, bool breakableAngles,
1606                                 bool modifySelection)
1607 {
1608   bool simplifyIndividualPaths =
1609     (bool) prefs_get_int_attribute("options.simplifyindividualpaths", "value", 0);
1610
1611   gchar *simplificationType;
1612   if (simplifyIndividualPaths) {
1613       simplificationType = _("Simplifying paths (separately):");
1614   } else {
1615       simplificationType = _("Simplifying paths:");
1616   }
1617
1618   bool didSomething = false;
1619
1620   NR::Maybe<NR::Rect> selectionBbox = selection->bounds();
1621   if (!selectionBbox) {
1622     return false;
1623   }
1624   gdouble selectionSize  = L2(selectionBbox->dimensions());
1625
1626   gdouble simplifySize  = selectionSize;
1627
1628   int pathsSimplified = 0;
1629   int totalPathCount  = g_slist_length(items);
1630
1631   // set "busy" cursor
1632   desktop->setWaitingCursor();
1633
1634   for (; items != NULL; items = items->next) {
1635       SPItem *item = (SPItem *) items->data;
1636
1637       if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
1638           continue;
1639
1640       if (simplifyIndividualPaths) {
1641           NR::Maybe<NR::Rect> itemBbox = item->getBounds(from_2geom(sp_item_i2d_affine(item)));
1642           if (itemBbox) {
1643               simplifySize      = L2(itemBbox->dimensions());
1644           } else {
1645               simplifySize      = 0;
1646           }
1647       }
1648
1649       pathsSimplified++;
1650
1651       if (pathsSimplified % 20 == 0) {
1652         gchar *message = g_strdup_printf(_("%s <b>%d</b> of <b>%d</b> paths simplified..."), simplificationType, pathsSimplified, totalPathCount);
1653         desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, message);
1654       }
1655
1656       didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
1657                           threshold, justCoalesce, angleLimit, breakableAngles, simplifySize, modifySelection);
1658   }
1659
1660   desktop->clearWaitingCursor();
1661
1662   if (pathsSimplified > 20) {
1663     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, g_strdup_printf(_("<b>%d</b> paths simplified."), pathsSimplified));
1664   }
1665
1666   return didSomething;
1667 }
1668
1669 void
1670 sp_selected_path_simplify_selection(float threshold, bool justCoalesce,
1671                        float angleLimit, bool breakableAngles)
1672 {
1673     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
1674
1675     Inkscape::Selection *selection = sp_desktop_selection(desktop);
1676
1677     if (selection->isEmpty()) {
1678         desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
1679                          _("Select <b>path(s)</b> to simplify."));
1680         return;
1681     }
1682
1683     GSList *items = g_slist_copy((GSList *) selection->itemList());
1684
1685     bool didSomething = sp_selected_path_simplify_items(desktop, selection,
1686                                                         items, threshold,
1687                                                         justCoalesce,
1688                                                         angleLimit,
1689                                                         breakableAngles, true);
1690
1691     if (didSomething)
1692         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_SIMPLIFY,
1693                          _("Simplify"));
1694     else
1695         desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
1696
1697 }
1698
1699
1700 // globals for keeping track of accelerated simplify
1701 static double previousTime      = 0.0;
1702 static gdouble simplifyMultiply = 1.0;
1703
1704 void
1705 sp_selected_path_simplify(void)
1706 {
1707     gdouble simplifyThreshold =
1708         prefs_get_double_attribute("options.simplifythreshold", "value", 0.003);
1709     bool simplifyJustCoalesce =
1710         (bool) prefs_get_int_attribute("options.simplifyjustcoalesce", "value", 0);
1711
1712     //Get the current time
1713     GTimeVal currentTimeVal;
1714     g_get_current_time(&currentTimeVal);
1715     double currentTime = currentTimeVal.tv_sec * 1000000 +
1716                 currentTimeVal.tv_usec;
1717
1718     //Was the previous call to this function recent? (<0.5 sec)
1719     if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
1720
1721         // add to the threshold 1/2 of its original value
1722         simplifyMultiply  += 0.5;
1723         simplifyThreshold *= simplifyMultiply;
1724
1725     } else {
1726         // reset to the default
1727         simplifyMultiply = 1;
1728     }
1729
1730     //remember time for next call
1731     previousTime = currentTime;
1732
1733     //g_print("%g\n", simplify_threshold);
1734
1735     //Make the actual call
1736     sp_selected_path_simplify_selection(simplifyThreshold,
1737                       simplifyJustCoalesce, 0.0, false);
1738 }
1739
1740
1741
1742 // fonctions utilitaires
1743
1744 bool
1745 Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
1746 {
1747     if (who == NULL || a == NULL)
1748         return false;
1749     if (who == a)
1750         return true;
1751     return Ancetre(sp_repr_parent(a), who);
1752 }
1753
1754 Path *
1755 Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
1756 {
1757     SPCurve *curve = curve_for_item(item);
1758     if (curve == NULL) {
1759         return NULL;
1760     }
1761
1762     Geom::PathVector pathv = pathvector_for_curve(item, curve, doTransformation, transformFull);
1763
1764     Path *dest = new Path;
1765     dest->LoadPathVector(pathv);
1766
1767     curve->unref();
1768
1769     return dest;
1770 }
1771
1772 /*
1773  * This function always returns a new NArtBpath, the caller must g_free the returned path!
1774 */
1775 NArtBpath *
1776 bpath_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull)
1777 {
1778     if (curve == NULL)
1779         return NULL;
1780
1781     NArtBpath *bpath = BPath_from_2GeomPath(curve->get_pathvector());
1782     if (bpath == NULL) {
1783         return NULL;
1784     }
1785
1786     NArtBpath *new_bpath; // we will get a duplicate which has to be freed at some point!
1787     if (doTransformation) {
1788         if (transformFull) {
1789             new_bpath = nr_artpath_affine(bpath, from_2geom(sp_item_i2doc_affine(item)));
1790         } else {
1791             new_bpath = nr_artpath_affine(bpath, item->transform);
1792         }
1793     } else {
1794         new_bpath = nr_artpath_affine(bpath, NR::identity());
1795     }
1796
1797     g_free(bpath);
1798     return new_bpath;
1799 }
1800
1801 /*
1802  * NOTE: Returns empty pathvector if curve == NULL
1803  * TODO: see if calling this method can be optimized. All the pathvector copying might be slow.
1804  */
1805 Geom::PathVector
1806 pathvector_for_curve(SPItem *item, SPCurve *curve, bool doTransformation, bool transformFull)
1807 {
1808     if (curve == NULL)
1809         return Geom::PathVector();
1810
1811     if (doTransformation) {
1812         if (transformFull) {
1813             return (curve->get_pathvector()) * sp_item_i2doc_affine(item);
1814         } else {
1815             return (curve->get_pathvector()) * to_2geom(item->transform);
1816         }
1817     } else {
1818         return curve->get_pathvector();
1819     }
1820 }
1821
1822 SPCurve* curve_for_item(SPItem *item)
1823 {
1824     if (!item)
1825         return NULL;
1826
1827     SPCurve *curve = NULL;
1828
1829     if (SP_IS_SHAPE(item)) {
1830         if (SP_IS_PATH(item)) {
1831             curve = sp_path_get_curve_for_edit(SP_PATH(item));
1832         } else {
1833             curve = sp_shape_get_curve(SP_SHAPE(item));
1834         }
1835     }
1836     else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item))
1837     {
1838         curve = te_get_layout(item)->convertToCurves();
1839     }
1840     else if (SP_IS_IMAGE(item))
1841     {
1842         curve = sp_image_get_curve(SP_IMAGE(item));
1843     }
1844
1845     return curve; // do not forget to unref the curve at some point!
1846 }
1847
1848 Path *bpath_to_Path(NArtBpath const *bpath) {
1849     Path *dest = new Path;
1850     dest->SetBackData(false);
1851     {
1852         int   i;
1853         bool  closed = false;
1854         float lastX  = 0.0;
1855         float lastY  = 0.0;
1856
1857         for (i = 0; bpath[i].code != NR_END; i++) {
1858             switch (bpath[i].code) {
1859                 case NR_LINETO:
1860                     lastX = bpath[i].x3;
1861                     lastY = bpath[i].y3;
1862                     {
1863                         NR::Point tmp(lastX, lastY);
1864                         dest->LineTo(tmp);
1865                     }
1866                     break;
1867
1868                 case NR_CURVETO:
1869                 {
1870                     NR::Point tmp, tms, tme;
1871                     tmp[0]=bpath[i].x3;
1872                     tmp[1]=bpath[i].y3;
1873                     tms[0]=3 * (bpath[i].x1 - lastX);
1874                     tms[1]=3 * (bpath[i].y1 - lastY);
1875                     tme[0]=3 * (bpath[i].x3 - bpath[i].x2);
1876                     tme[1]=3 * (bpath[i].y3 - bpath[i].y2);
1877                     dest->CubicTo(tmp,tms,tme);
1878                 }
1879                 lastX = bpath[i].x3;
1880                 lastY = bpath[i].y3;
1881                 break;
1882
1883                 case NR_MOVETO_OPEN:
1884                 case NR_MOVETO:
1885                     if (closed)
1886                         dest->Close();
1887                     closed = (bpath[i].code == NR_MOVETO);
1888                     lastX = bpath[i].x3;
1889                     lastY = bpath[i].y3;
1890                     {
1891                         NR::Point  tmp(lastX, lastY);
1892                         dest->MoveTo(tmp);
1893                     }
1894                     break;
1895                 default:
1896                     break;
1897             }
1898         }
1899         if (closed)
1900             dest->Close();
1901     }
1902     return dest;
1903 }
1904
1905 NR::Maybe<Path::cut_position> get_nearest_position_on_Path(Path *path, NR::Point p, unsigned seg)
1906 {
1907     //get nearest position on path
1908     Path::cut_position pos = path->PointToCurvilignPosition(p, seg);
1909     return pos;
1910 }
1911
1912 NR::Point get_point_on_Path(Path *path, int piece, double t)
1913 {
1914     NR::Point p;
1915     path->PointAt(piece, t, p);
1916     return p;
1917 }
1918
1919
1920 /*
1921   Local Variables:
1922   mode:c++
1923   c-file-style:"stroustrup"
1924   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1925   indent-tabs-mode:nil
1926   fill-column:99
1927   End:
1928 */
1929 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :