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Diffstat (limited to 'src/sp-offset.cpp')
| -rw-r--r-- | src/sp-offset.cpp | 1224 |
1 files changed, 0 insertions, 1224 deletions
diff --git a/src/sp-offset.cpp b/src/sp-offset.cpp deleted file mode 100644 index 82e0b4947..000000000 --- a/src/sp-offset.cpp +++ /dev/null @@ -1,1224 +0,0 @@ -/** \file - * Implementation of <path sodipodi:type="inkscape:offset">. - */ - -/* - * Authors: (of the sp-spiral.c upon which this file was constructed): - * Mitsuru Oka <oka326@parkcity.ne.jp> - * Lauris Kaplinski <lauris@kaplinski.com> - * Abhishek Sharma - * - * Copyright (C) 1999-2002 Lauris Kaplinski - * Copyright (C) 2000-2001 Ximian, Inc. - * - * Released under GNU GPL, read the file 'COPYING' for more information - */ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include "sp-offset.h" - -#include <cstring> -#include <string> - -#include <glibmm/i18n.h> - -#include "bad-uri-exception.h" -#include "svg/svg.h" -#include "attributes.h" -#include "display/curve.h" - -#include "livarot/Path.h" -#include "livarot/Shape.h" - -#include "enums.h" -#include "preferences.h" -#include "sp-text.h" -#include "sp-use-reference.h" -#include "uri.h" - -class SPDocument; - -#define noOFFSET_VERBOSE - -/** \note - * SPOffset is a derivative of SPShape, much like the SPSpiral or SPRect. - * The goal is to have a source shape (= originalPath), an offset (= radius) - * and compute the offset of the source by the radius. To get it to work, - * one needs to know what the source is and what the radius is, and how it's - * stored in the xml representation. The object itself is a "path" element, - * to get lots of shape functionality for free. The source is the easy part: - * it's stored in a "inkscape:original" attribute in the path. In case of - * "linked" offset, as they've been dubbed, there is an additional - * "inkscape:href" that contains the id of an element of the svg. - * When built, the object will attach a listener vector to that object and - * rebuild the "inkscape:original" whenever the href'd object changes. This - * is of course grossly inefficient, and also does not react to changes - * to the href'd during context stuff (like changing the shape of a star by - * dragging control points) unless the path of that object is changed during - * the context (seems to be the case for SPEllipse). The computation of the - * offset is done in sp_offset_set_shape(), a function that is called whenever - * a change occurs to the offset (change of source or change of radius). - * just like the sp-star and other, this path derivative can make control - * points, or more precisely one control point, that's enough to define the - * radius (look in shape-editor-knotholders). - */ - -static void refresh_offset_source(SPOffset* offset); - -static void sp_offset_start_listening(SPOffset *offset,SPObject* to); -static void sp_offset_quit_listening(SPOffset *offset); -static void sp_offset_href_changed(SPObject *old_ref, SPObject *ref, SPOffset *offset); -static void sp_offset_move_compensate(Geom::Affine const *mp, SPItem *original, SPOffset *self); -static void sp_offset_delete_self(SPObject *deleted, SPOffset *self); -static void sp_offset_source_modified (SPObject *iSource, guint flags, SPItem *item); - - -// slow= source path->polygon->offset of polygon->polygon->path -// fast= source path->offset of source path->polygon->path -// fast is not mathematically correct, because computing the offset of a single -// cubic bezier patch is not trivial; in particular, there are problems with holes -// reappearing in offset when the radius becomes too large -//TODO: need fix for bug: #384688 with fix released in r.14156 -//but reverted because bug #1507049 seems has more priority. -static bool use_slow_but_correct_offset_method = false; - -SPOffset::SPOffset() : SPShape() { - this->rad = 1.0; - this->original = NULL; - this->originalPath = NULL; - this->knotSet = false; - this->sourceDirty=false; - this->isUpdating=false; - // init various connections - this->sourceHref = NULL; - this->sourceRepr = NULL; - this->sourceObject = NULL; - - // set up the uri reference - this->sourceRef = new SPUseReference(this); - this->_changed_connection = this->sourceRef->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_offset_href_changed), this)); -} - -SPOffset::~SPOffset() { - delete this->sourceRef; - - this->_modified_connection.disconnect(); - this->_delete_connection.disconnect(); - this->_changed_connection.disconnect(); - this->_transformed_connection.disconnect(); -} - -void SPOffset::build(SPDocument *document, Inkscape::XML::Node *repr) { - SPShape::build(document, repr); - - //XML Tree being used directly here while it shouldn't be. - if (this->getRepr()->attribute("inkscape:radius")) { - this->readAttr( "inkscape:radius" ); - } else { - //XML Tree being used directly here (as object->getRepr) - //in all the below lines in the block while it shouldn't be. - gchar const *oldA = this->getRepr()->attribute("sodipodi:radius"); - this->getRepr()->setAttribute("inkscape:radius",oldA); - this->getRepr()->setAttribute("sodipodi:radius",NULL); - - this->readAttr( "inkscape:radius" ); - } - - if (this->getRepr()->attribute("inkscape:original")) { - this->readAttr( "inkscape:original" ); - } else { - gchar const *oldA = this->getRepr()->attribute("sodipodi:original"); - this->getRepr()->setAttribute("inkscape:original",oldA); - this->getRepr()->setAttribute("sodipodi:original",NULL); - - this->readAttr( "inkscape:original" ); - } - - if (this->getRepr()->attribute("xlink:href")) { - this->readAttr( "xlink:href" ); - } else { - gchar const *oldA = this->getRepr()->attribute("inkscape:href"); - - if (oldA) { - size_t lA = strlen(oldA); - char *nA=(char*)malloc((1+lA+1)*sizeof(char)); - - memcpy(nA+1,oldA,lA*sizeof(char)); - - nA[0]='#'; - nA[lA+1]=0; - - this->getRepr()->setAttribute("xlink:href",nA); - - free(nA); - - this->getRepr()->setAttribute("inkscape:href",NULL); - } - - this->readAttr( "xlink:href" ); - } -} - -Inkscape::XML::Node* SPOffset::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) { - if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) { - repr = xml_doc->createElement("svg:path"); - } - - if (flags & SP_OBJECT_WRITE_EXT) { - /** \todo - * Fixme: we may replace these attributes by - * inkscape:offset="cx cy exp revo rad arg t0" - */ - repr->setAttribute("sodipodi:type", "inkscape:offset"); - sp_repr_set_svg_double(repr, "inkscape:radius", this->rad); - repr->setAttribute("inkscape:original", this->original); - repr->setAttribute("inkscape:href", this->sourceHref); - } - - - // Make sure the offset has curve - SPCurve *curve = SP_SHAPE (this)->getCurve(); - - if (curve == NULL) { - this->set_shape(); - } - - // write that curve to "d" - char *d = sp_svg_write_path (this->_curve->get_pathvector()); - repr->setAttribute("d", d); - g_free (d); - - SPShape::write(xml_doc, repr, flags | SP_SHAPE_WRITE_PATH); - - return repr; -} - -void SPOffset::release() { - if (this->original) { - free (this->original); - } - - if (this->originalPath) { - delete ((Path *) this->originalPath); - } - - this->original = NULL; - this->originalPath = NULL; - - sp_offset_quit_listening(this); - - this->_changed_connection.disconnect(); - - g_free(this->sourceHref); - - this->sourceHref = NULL; - this->sourceRef->detach(); - - SPShape::release(); -} - -void SPOffset::set(unsigned int key, const gchar* value) { - if ( this->sourceDirty ) { - refresh_offset_source(this); - } - - /* fixme: we should really collect updates */ - switch (key) - { - case SP_ATTR_INKSCAPE_ORIGINAL: - case SP_ATTR_SODIPODI_ORIGINAL: - if (value == NULL) { - } else { - if (this->original) { - free (this->original); - delete ((Path *) this->originalPath); - - this->original = NULL; - this->originalPath = NULL; - } - - this->original = strdup (value); - - Geom::PathVector pv = sp_svg_read_pathv(this->original); - - this->originalPath = new Path; - reinterpret_cast<Path *>(this->originalPath)->LoadPathVector(pv); - - this->knotSet = false; - - if ( this->isUpdating == false ) { - this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); - } - } - break; - - case SP_ATTR_INKSCAPE_RADIUS: - case SP_ATTR_SODIPODI_RADIUS: - if (!sp_svg_length_read_computed_absolute (value, &this->rad)) { - if (fabs (this->rad) < 0.01) { - this->rad = (this->rad < 0) ? -0.01 : 0.01; - } - - this->knotSet = false; // knotset=false because it's not set from the context - } - - if ( this->isUpdating == false ) { - this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); - } - break; - - case SP_ATTR_INKSCAPE_HREF: - case SP_ATTR_XLINK_HREF: - if ( value == NULL ) { - sp_offset_quit_listening(this); - if ( this->sourceHref ) { - g_free(this->sourceHref); - } - - this->sourceHref = NULL; - this->sourceRef->detach(); - } else { - if ( this->sourceHref && ( strcmp(value, this->sourceHref) == 0 ) ) { - } else { - if ( this->sourceHref ) { - g_free(this->sourceHref); - } - - this->sourceHref = g_strdup(value); - - try { - this->sourceRef->attach(Inkscape::URI(value)); - } catch (Inkscape::BadURIException &e) { - g_warning("%s", e.what()); - this->sourceRef->detach(); - } - } - } - break; - - default: - SPShape::set(key, value); - break; - } -} - -void SPOffset::update(SPCtx *ctx, guint flags) { - this->isUpdating=true; // prevent sp_offset_set from requesting updates - - if ( this->sourceDirty ) { - refresh_offset_source(this); - } - - if (flags & - (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | - SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) { - - this->set_shape(); - } - - this->isUpdating=false; - - SPShape::update(ctx, flags); -} - -const char* SPOffset::displayName() const { - if ( this->sourceHref ) { - return _("Linked Offset"); - } else { - return _("Dynamic Offset"); - } -} - -gchar* SPOffset::description() const { - // TRANSLATORS COMMENT: %s is either "outset" or "inset" depending on sign - return g_strdup_printf(_("%s by %f pt"), (this->rad >= 0) ? - _("outset") : _("inset"), fabs (this->rad)); -} - -void SPOffset::set_shape() { - if ( this->originalPath == NULL ) { - // oops : no path?! (the offset object should do harakiri) - return; - } -#ifdef OFFSET_VERBOSE - g_print ("rad=%g\n", offset->rad); -#endif - // au boulot - - if ( fabs(this->rad) < 0.01 ) { - // grosso modo: 0 - // just put the source this as the offseted one, no one will notice - // it's also useless to compute the offset with a 0 radius - - //XML Tree being used directly here while it shouldn't be. - const char *res_d = this->getRepr()->attribute("inkscape:original"); - - if ( res_d ) { - Geom::PathVector pv = sp_svg_read_pathv(res_d); - SPCurve *c = new SPCurve(pv); - g_assert(c != NULL); - - this->setCurveInsync (c, TRUE); - this->setCurveBeforeLPE(c); - - c->unref(); - } - - return; - } - - // extra paraniac careful check. the preceding if () should take care of this case - if (fabs (this->rad) < 0.01) { - this->rad = (this->rad < 0) ? -0.01 : 0.01; - } - - Path *orig = new Path; - orig->Copy ((Path *)this->originalPath); - - if ( use_slow_but_correct_offset_method == false ) { - // version par outline - Shape *theShape = new Shape; - Shape *theRes = new Shape; - Path *originaux[1]; - Path *res = new Path; - res->SetBackData (false); - - // and now: offset - float o_width; - if (this->rad >= 0) - { - o_width = this->rad; - orig->OutsideOutline (res, o_width, join_round, butt_straight, 20.0); - } - else - { - o_width = -this->rad; - orig->OutsideOutline (res, -o_width, join_round, butt_straight, 20.0); - } - - if (o_width >= 1.0) - { - // res->ConvertForOffset (1.0, orig, offset->rad); - res->ConvertWithBackData (1.0); - } - else - { - // res->ConvertForOffset (o_width, orig, offset->rad); - res->ConvertWithBackData (o_width); - } - res->Fill (theShape, 0); - theRes->ConvertToShape (theShape, fill_positive); - originaux[0] = res; - - theRes->ConvertToForme (orig, 1, originaux); - - Geom::OptRect bbox = this->desktopVisualBounds(); - - if ( bbox ) { - gdouble size = L2(bbox->dimensions()); - gdouble const exp = this->transform.descrim(); - - if (exp != 0) { - size /= exp; - } - - orig->Coalesce (size * 0.001); - //g_print ("coa %g exp %g item %p\n", size * 0.001, exp, item); - } - - - // if (o_width >= 1.0) - // { - // orig->Coalesce (0.1); // small treshhold, since we only want to get rid of small segments - // the curve should already be computed by the Outline() function - // orig->ConvertEvenLines (1.0); - // orig->Simplify (0.5); - // } - // else - // { - // orig->Coalesce (0.1*o_width); - // orig->ConvertEvenLines (o_width); - // orig->Simplify (0.5 * o_width); - // } - - delete theShape; - delete theRes; - delete res; - } else { - // version par makeoffset - Shape *theShape = new Shape; - Shape *theRes = new Shape; - - - // and now: offset - float o_width; - if (this->rad >= 0) - { - o_width = this->rad; - } - else - { - o_width = -this->rad; - } - - // one has to have a measure of the details - if (o_width >= 1.0) - { - orig->ConvertWithBackData (0.5); - } - else - { - orig->ConvertWithBackData (0.5*o_width); - } - - orig->Fill (theShape, 0); - theRes->ConvertToShape (theShape, fill_positive); - - Path *originaux[1]; - originaux[0]=orig; - - Path *res = new Path; - theRes->ConvertToForme (res, 1, originaux); - - int nbPart=0; - Path** parts=res->SubPaths(nbPart,true); - char *holes=(char*)malloc(nbPart*sizeof(char)); - - // we offset contours separately, because we can. - // this way, we avoid doing a unique big ConvertToShape when dealing with big shapes with lots of holes - { - Shape* onePart=new Shape; - Shape* oneCleanPart=new Shape; - - theShape->Reset(); - - for (int i=0;i<nbPart;i++) { - double partSurf=parts[i]->Surface(); - parts[i]->Convert(1.0); - - { - // raffiner si besoin - double bL,bT,bR,bB; - parts[i]->PolylineBoundingBox(bL,bT,bR,bB); - double mesure=((bR-bL)+(bB-bT))*0.5; - if ( mesure < 10.0 ) { - parts[i]->Convert(0.02*mesure); - } - } - - if ( partSurf < 0 ) { // inverse par rapport a la realite - // plein - holes[i]=0; - parts[i]->Fill(oneCleanPart,0); - onePart->ConvertToShape(oneCleanPart,fill_positive); // there aren't intersections in that one, but maybe duplicate points and null edges - oneCleanPart->MakeOffset(onePart,this->rad,join_round,20.0); - onePart->ConvertToShape(oneCleanPart,fill_positive); - - onePart->CalcBBox(); - double typicalSize=0.5*((onePart->rightX-onePart->leftX)+(onePart->bottomY-onePart->topY)); - - if ( typicalSize < 0.05 ) { - typicalSize=0.05; - } - - typicalSize*=0.01; - - if ( typicalSize > 1.0 ) { - typicalSize=1.0; - } - - onePart->ConvertToForme (parts[i]); - parts[i]->ConvertEvenLines (typicalSize); - parts[i]->Simplify (typicalSize); - - double nPartSurf=parts[i]->Surface(); - - if ( nPartSurf >= 0 ) { - // inversion de la surface -> disparait - delete parts[i]; - parts[i]=NULL; - } else { - } - -/* int firstP=theShape->nbPt; - for (int j=0;j<onePart->nbPt;j++) theShape->AddPoint(onePart->pts[j].x); - for (int j=0;j<onePart->nbAr;j++) theShape->AddEdge(firstP+onePart->aretes[j].st,firstP+onePart->aretes[j].en);*/ - } else { - // trou - holes[i]=1; - parts[i]->Fill(oneCleanPart,0,false,true,true); - onePart->ConvertToShape(oneCleanPart,fill_positive); - oneCleanPart->MakeOffset(onePart,-this->rad,join_round,20.0); - onePart->ConvertToShape(oneCleanPart,fill_positive); -// for (int j=0;j<onePart->nbAr;j++) onePart->Inverse(j); // pas oublier de reinverser - - onePart->CalcBBox(); - double typicalSize=0.5*((onePart->rightX-onePart->leftX)+(onePart->bottomY-onePart->topY)); - - if ( typicalSize < 0.05 ) { - typicalSize=0.05; - } - - typicalSize*=0.01; - - if ( typicalSize > 1.0 ) { - typicalSize=1.0; - } - - onePart->ConvertToForme (parts[i]); - parts[i]->ConvertEvenLines (typicalSize); - parts[i]->Simplify (typicalSize); - double nPartSurf=parts[i]->Surface(); - - if ( nPartSurf >= 0 ) { - // inversion de la surface -> disparait - delete parts[i]; - parts[i]=NULL; - } else { - } - - /* int firstP=theShape->nbPt; - for (int j=0;j<onePart->nbPt;j++) theShape->AddPoint(onePart->pts[j].x); - for (int j=0;j<onePart->nbAr;j++) theShape->AddEdge(firstP+onePart->aretes[j].en,firstP+onePart->aretes[j].st);*/ - } -// delete parts[i]; - } -// theShape->MakeOffset(theRes,offset->rad,join_round,20.0); - delete onePart; - delete oneCleanPart; - } - - if ( nbPart > 1 ) { - theShape->Reset(); - - for (int i=0;i<nbPart;i++) { - if ( parts[i] ) { - parts[i]->ConvertWithBackData(1.0); - - if ( holes[i] ) { - parts[i]->Fill(theShape,i,true,true,true); - } else { - parts[i]->Fill(theShape,i,true,true,false); - } - } - } - - theRes->ConvertToShape (theShape, fill_positive); - theRes->ConvertToForme (orig,nbPart,parts); - - for (int i=0;i<nbPart;i++) { - if ( parts[i] ) { - delete parts[i]; - } - } - } else if ( nbPart == 1 ) { - orig->Copy(parts[0]); - - for (int i=0;i<nbPart;i++) { - if ( parts[i] ) { - delete parts[i]; - } - } - } else { - orig->Reset(); - } -// theRes->ConvertToShape (theShape, fill_positive); -// theRes->ConvertToForme (orig); - -/* if (o_width >= 1.0) { - orig->ConvertEvenLines (1.0); - orig->Simplify (1.0); - } else { - orig->ConvertEvenLines (1.0*o_width); - orig->Simplify (1.0 * o_width); - }*/ - - if ( parts ) { - free(parts); - } - - if ( holes ) { - free(holes); - } - - delete res; - delete theShape; - delete theRes; - } - { - char *res_d = NULL; - - if (orig->descr_cmd.size() <= 1) - { - // Aie.... nothing left. - res_d = strdup ("M 0 0 L 0 0 z"); - //printf("%s\n",res_d); - } - else - { - - res_d = orig->svg_dump_path (); - } - - delete orig; - - Geom::PathVector pv = sp_svg_read_pathv(res_d); - SPCurve *c = new SPCurve(pv); - g_assert(c != NULL); - - this->setCurveInsync (c, TRUE); - this->setCurveBeforeLPE(c); - c->unref(); - - free (res_d); - } -} - -void SPOffset::snappoints(std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs) const { - SPShape::snappoints(p, snapprefs); -} - - -// utilitaires pour les poignees -// used to get the distance to the shape: distance to polygon give the fabs(radius), we still need -// the sign. for edges, it's easy to determine which side the point is on, for points of the polygon -// it's trickier: we need to identify which angle the point is in; to that effect, we take each -// successive clockwise angle (A,C) and check if the vector B given by the point is in the angle or -// outside. -// another method would be to use the Winding() function to test whether the point is inside or outside -// the polygon (it would be wiser to do so, in fact, but i like being stupid) - -/** - * - * \todo - * FIXME: This can be done using linear operations, more stably and - * faster. method: transform A and C into B's space, A should be - * negative and B should be positive in the orthogonal component. I - * think this is equivalent to - * dot(A, rot90(B))*dot(C, rot90(B)) == -1. - * -- njh - */ -static bool -vectors_are_clockwise (Geom::Point A, Geom::Point B, Geom::Point C) -{ - using Geom::rot90; - double ab_s = dot(A, rot90(B)); - double ab_c = dot(A, B); - double bc_s = dot(B, rot90(C)); - double bc_c = dot(B, C); - double ca_s = dot(C, rot90(A)); - double ca_c = dot(C, A); - - double ab_a = acos (ab_c); - - if (ab_c <= -1.0) { - ab_a = M_PI; - } - - if (ab_c >= 1.0) { - ab_a = 0; - } - - if (ab_s < 0) { - ab_a = 2 * M_PI - ab_a; - } - - double bc_a = acos (bc_c); - - if (bc_c <= -1.0) { - bc_a = M_PI; - } - - if (bc_c >= 1.0) { - bc_a = 0; - } - - if (bc_s < 0) { - bc_a = 2 * M_PI - bc_a; - } - - double ca_a = acos (ca_c); - - if (ca_c <= -1.0) { - ca_a = M_PI; - } - - if (ca_c >= 1.0) { - ca_a = 0; - } - - if (ca_s < 0) { - ca_a = 2 * M_PI - ca_a; - } - - double lim = 2 * M_PI - ca_a; - - if (ab_a < lim) { - return true; - } - - return false; -} - -/** - * Distance to the original path; that function is called from shape-editor-knotholders - * to set the radius when the control knot moves. - * - * The sign of the result is the radius we're going to offset the shape with, - * so result > 0 ==outset and result < 0 ==inset. thus result<0 means - * 'px inside source'. - */ -double -sp_offset_distance_to_original (SPOffset * offset, Geom::Point px) -{ - if (offset == NULL || offset->originalPath == NULL || ((Path *) offset->originalPath)->descr_cmd.size() <= 1) { - return 1.0; - } - - double dist = 1.0; - Shape *theShape = new Shape; - Shape *theRes = new Shape; - - /** \todo - * Awfully damn stupid method: uncross the source path EACH TIME you - * need to compute the distance. The good way to do this would be to - * store the uncrossed source path somewhere, and delete it when the - * context is finished. Hopefully this part is much faster than actually - * computing the offset (which happen just after), so the time spent in - * this function should end up being negligible with respect to the - * delay of one context. - */ - // move - ((Path *) offset->originalPath)->Convert (1.0); - ((Path *) offset->originalPath)->Fill (theShape, 0); - theRes->ConvertToShape (theShape, fill_oddEven); - - if (theRes->numberOfEdges() <= 1) - { - - } - else - { - double ptDist = -1.0; - bool ptSet = false; - double arDist = -1.0; - bool arSet = false; - - // first get the minimum distance to the points - for (int i = 0; i < theRes->numberOfPoints(); i++) - { - if (theRes->getPoint(i).totalDegree() > 0) - { - Geom::Point nx = theRes->getPoint(i).x; - Geom::Point nxpx = px-nx; - double ndist = sqrt (dot(nxpx,nxpx)); - - if (ptSet == false || fabs (ndist) < fabs (ptDist)) - { - // we have a new minimum distance - // now we need to wheck if px is inside or outside (for the sign) - nx = px - theRes->getPoint(i).x; - double nlen = sqrt (dot(nx , nx)); - nx /= nlen; - int pb, cb, fb; - fb = theRes->getPoint(i).incidentEdge[LAST]; - pb = theRes->getPoint(i).incidentEdge[LAST]; - cb = theRes->getPoint(i).incidentEdge[FIRST]; - - do - { - // one angle - Geom::Point prx, nex; - prx = theRes->getEdge(pb).dx; - nlen = sqrt (dot(prx, prx)); - prx /= nlen; - nex = theRes->getEdge(cb).dx; - nlen = sqrt (dot(nex , nex)); - nex /= nlen; - - if (theRes->getEdge(pb).en == i) - { - prx = -prx; - } - - if (theRes->getEdge(cb).en == i) - { - nex = -nex; - } - - if (vectors_are_clockwise (nex, nx, prx)) - { - // we're in that angle. set the sign, and exit that loop - if (theRes->getEdge(cb).st == i) - { - ptDist = -ndist; - ptSet = true; - } - else - { - ptDist = ndist; - ptSet = true; - } - break; - } - - pb = cb; - cb = theRes->NextAt (i, cb); - } - - while (cb >= 0 && pb >= 0 && pb != fb); - } - } - } - - // loop over the edges to try to improve the distance - for (int i = 0; i < theRes->numberOfEdges(); i++) - { - Geom::Point sx = theRes->getPoint(theRes->getEdge(i).st).x; - Geom::Point ex = theRes->getPoint(theRes->getEdge(i).en).x; - Geom::Point nx = ex - sx; - double len = sqrt (dot(nx,nx)); - - if (len > 0.0001) - { - Geom::Point pxsx=px-sx; - double ab = dot(nx,pxsx); - - if (ab > 0 && ab < len * len) - { - // we're in the zone of influence of the segment - double ndist = (cross(nx, pxsx)) / len; - - if (arSet == false || fabs (ndist) < fabs (arDist)) - { - arDist = ndist; - arSet = true; - } - } - } - } - - if (arSet || ptSet) - { - if (arSet == false) { - arDist = ptDist; - } - - if (ptSet == false) { - ptDist = arDist; - } - - if (fabs (ptDist) < fabs (arDist)) { - dist = ptDist; - } else { - dist = arDist; - } - } - } - - delete theShape; - delete theRes; - - return dist; -} - -/** - * Computes a point on the offset; used to set a "seed" position for - * the control knot. - * - * \return the topmost point on the offset. - */ -void -sp_offset_top_point (SPOffset const * offset, Geom::Point *px) -{ - (*px) = Geom::Point(0, 0); - - if (offset == NULL) { - return; - } - - if (offset->knotSet) - { - (*px) = offset->knot; - return; - } - - SPCurve *curve = SP_SHAPE (offset)->getCurve(); - - if (curve == NULL) - { - // CPPIFY - //offset->set_shape(); - const_cast<SPOffset*>(offset)->set_shape(); - - curve = SP_SHAPE (offset)->getCurve(); - - if (curve == NULL) - return; - } - - if (curve->is_empty()) - { - curve->unref(); - return; - } - - Path *finalPath = new Path; - finalPath->LoadPathVector(curve->get_pathvector()); - - Shape *theShape = new Shape; - - finalPath->Convert (1.0); - finalPath->Fill (theShape, 0); - - if (theShape->hasPoints()) - { - theShape->SortPoints (); - *px = theShape->getPoint(0).x; - } - - delete theShape; - delete finalPath; - curve->unref(); -} - -// the listening functions -static void sp_offset_start_listening(SPOffset *offset,SPObject* to) -{ - if ( to == NULL ) { - return; - } - - offset->sourceObject = to; - offset->sourceRepr = to->getRepr(); - - offset->_delete_connection = to->connectDelete(sigc::bind(sigc::ptr_fun(&sp_offset_delete_self), offset)); - offset->_transformed_connection = SP_ITEM(to)->connectTransformed(sigc::bind(sigc::ptr_fun(&sp_offset_move_compensate), offset)); - offset->_modified_connection = to->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_offset_source_modified), offset)); -} - -static void sp_offset_quit_listening(SPOffset *offset) -{ - if ( offset->sourceObject == NULL ) { - return; - } - - offset->_modified_connection.disconnect(); - offset->_delete_connection.disconnect(); - offset->_transformed_connection.disconnect(); - - offset->sourceRepr = NULL; - offset->sourceObject = NULL; -} - -static void -sp_offset_href_changed(SPObject */*old_ref*/, SPObject */*ref*/, SPOffset *offset) -{ - sp_offset_quit_listening(offset); - - if (offset->sourceRef) { - SPItem *refobj = offset->sourceRef->getObject(); - - if (refobj) { - sp_offset_start_listening(offset,refobj); - } - - offset->sourceDirty=true; - offset->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); - } -} - -static void sp_offset_move_compensate(Geom::Affine const *mp, SPItem */*original*/, SPOffset *self) -{ - Inkscape::Preferences *prefs = Inkscape::Preferences::get(); - guint mode = prefs->getInt("/options/clonecompensation/value", SP_CLONE_COMPENSATION_PARALLEL); - - Geom::Affine m(*mp); - - if (!(m.isTranslation()) || mode == SP_CLONE_COMPENSATION_NONE) { - self->sourceDirty=true; - self->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); - return; - } - - // calculate the compensation matrix and the advertized movement matrix - self->readAttr("transform"); - - Geom::Affine t = self->transform; - Geom::Affine offset_move = t.inverse() * m * t; - - Geom::Affine advertized_move; - if (mode == SP_CLONE_COMPENSATION_PARALLEL) { - offset_move = offset_move.inverse() * m; - advertized_move = m; - } else if (mode == SP_CLONE_COMPENSATION_UNMOVED) { - offset_move = offset_move.inverse(); - advertized_move.setIdentity(); - } else { - g_assert_not_reached(); - } - - self->sourceDirty=true; - - // commit the compensation - self->transform *= offset_move; - self->doWriteTransform(self->transform, &advertized_move); - self->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); -} - -static void -sp_offset_delete_self(SPObject */*deleted*/, SPOffset *offset) -{ - Inkscape::Preferences *prefs = Inkscape::Preferences::get(); - guint const mode = prefs->getInt("/options/cloneorphans/value", SP_CLONE_ORPHANS_UNLINK); - - if (mode == SP_CLONE_ORPHANS_UNLINK) { - // leave it be. just forget about the source - sp_offset_quit_listening(offset); - - if ( offset->sourceHref ) { - g_free(offset->sourceHref); - } - - offset->sourceHref = NULL; - offset->sourceRef->detach(); - } else if (mode == SP_CLONE_ORPHANS_DELETE) { - offset->deleteObject(); - } -} - -static void -sp_offset_source_modified (SPObject */*iSource*/, guint flags, SPItem *item) -{ - SPOffset *offset = SP_OFFSET(item); - offset->sourceDirty=true; - - if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_CHILD_MODIFIED_FLAG)) { - offset->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); - } -} - -static void -refresh_offset_source(SPOffset* offset) -{ - if ( offset == NULL ) { - return; - } - - offset->sourceDirty=false; - - // le mauvais cas: pas d'attribut d => il faut verifier que c'est une SPShape puis prendre le contour - // The bad case: no d attribute. Must check that it's an SPShape and then take the outline. - SPObject *refobj=offset->sourceObject; - - if ( refobj == NULL ) { - return; - } - - SPItem *item = SP_ITEM (refobj); - SPCurve *curve = NULL; - - if (SP_IS_SHAPE (item)) { - curve = SP_SHAPE (item)->getCurve (); - } - else if (SP_IS_TEXT (item)) { - curve = SP_TEXT (item)->getNormalizedBpath (); - } - else { - return; - } - - if (curve == NULL) { - return; - } - - Path *orig = new Path; - orig->LoadPathVector(curve->get_pathvector()); - curve->unref(); - - if (!item->transform.isIdentity()) { - gchar const *t_attr = item->getRepr()->attribute("transform"); - - if (t_attr) { - Geom::Affine t; - - if (sp_svg_transform_read(t_attr, &t)) { - orig->Transform(t); - } - } - } - - // Finish up. - { - SPCSSAttr *css; - const gchar *val; - Shape *theShape = new Shape; - Shape *theRes = new Shape; - - orig->ConvertWithBackData (1.0); - orig->Fill (theShape, 0); - - css = sp_repr_css_attr (offset->sourceRepr , "style"); - val = sp_repr_css_property (css, "fill-rule", NULL); - - if (val && strcmp (val, "nonzero") == 0) - { - theRes->ConvertToShape (theShape, fill_nonZero); - } - else if (val && strcmp (val, "evenodd") == 0) - { - theRes->ConvertToShape (theShape, fill_oddEven); - } - else - { - theRes->ConvertToShape (theShape, fill_nonZero); - } - - Path *originaux[1]; - originaux[0] = orig; - Path *res = new Path; - theRes->ConvertToForme (res, 1, originaux); - - delete theShape; - delete theRes; - - char *res_d = res->svg_dump_path (); - delete res; - delete orig; - - // TODO fix: - //XML Tree being used diectly here while it shouldn't be. - offset->getRepr()->setAttribute("inkscape:original", res_d); - - free (res_d); - } -} - -SPItem * -sp_offset_get_source (SPOffset *offset) -{ - if (offset && offset->sourceRef) { - SPItem *refobj = offset->sourceRef->getObject(); - - if (SP_IS_ITEM (refobj)) { - return (SPItem *) refobj; - } - } - - return NULL; -} - - -/* - Local Variables: - mode:c++ - c-file-style:"stroustrup" - c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) - indent-tabs-mode:nil - fill-column:99 - End: -*/ -// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |