splivarot.cpp revision cb66684ade83181895b00b563904d4cbc0d8081c
#define __SP_LIVAROT_C__
/*
* splivarot.cpp
* Inkscape
*
* Created by fred on Fri Dec 05 2003.
* tweaked endlessly by bulia byak <buliabyak@users.sf.net>
* public domain
*
*/
/*
* contains lots of stitched pieces of path-chemistry.c
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "xml/repr.h"
#include "svg/svg.h"
#include "sp-path.h"
#include "sp-text.h"
#include "sp-item-group.h"
#include "style.h"
#include "inkscape.h"
#include "document.h"
#include "message-stack.h"
#include "selection.h"
#include "desktop-handles.h"
#include "desktop.h"
#include "display/canvas-bpath.h"
#include "display/curve.h"
#include <glibmm/i18n.h>
#include "prefs-utils.h"
#include "libnr/n-art-bpath.h"
#include "libnr/nr-path.h"
#include "xml/repr.h"
#include "xml/repr-sorting.h"
#include "livarot/Path.h"
#include "livarot/Shape.h"
#include "splivarot.h"
bool Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who);
void sp_selected_path_boolop(bool_op bop);
void sp_selected_path_do_offset(bool expand, double prefOffset);
void sp_selected_path_create_offset_object(int expand, bool updating);
void
sp_selected_path_union()
{
sp_selected_path_boolop(bool_op_union);
}
void
sp_selected_path_intersect()
{
sp_selected_path_boolop(bool_op_inters);
}
void
sp_selected_path_diff()
{
sp_selected_path_boolop(bool_op_diff);
}
void
sp_selected_path_symdiff()
{
sp_selected_path_boolop(bool_op_symdiff);
}
void
sp_selected_path_cut()
{
sp_selected_path_boolop(bool_op_cut);
}
void
sp_selected_path_slice()
{
sp_selected_path_boolop(bool_op_slice);
}
// boolean operations
// take the source paths from the file, do the operation, delete the originals and add the results
void
sp_selected_path_boolop(bool_op bop)
{
SPDesktop *desktop = SP_ACTIVE_DESKTOP;
Inkscape::Selection *selection = sp_desktop_selection(desktop);
GSList *il = (GSList *) selection->itemList();
if (g_slist_length(il) < 2) {
desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>at least 2 paths</b> to perform a boolean operation."));
return;
}
if (g_slist_length(il) > 2) {
if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Select <b>exactly 2 paths</b> to perform difference, XOR, division, or path cut."));
return;
}
}
// reverseOrderForOp marks whether the order of the list is the top->down order
// it's only used when there are 2 objects, and for operations who need to know the
// topmost object (differences, cuts)
bool reverseOrderForOp = false;
// mettre les elements de la liste dans l'ordre pour ces operations
if (bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice) {
// check in the tree to find which element of the selection list is topmost (for 2-operand commands only)
Inkscape::XML::Node *a = SP_OBJECT_REPR(il->data);
Inkscape::XML::Node *b = SP_OBJECT_REPR(il->next->data);
if (a == NULL || b == NULL) {
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."));
return;
}
if (Ancetre(a, b)) {
// a is the parent of b, already in the proper order
} else if (Ancetre(b, a)) {
// reverse order
reverseOrderForOp = true;
} else {
// objects are not in parent/child relationship;
// find their lowest common ancestor
Inkscape::XML::Node *dad = LCA(a, b);
if (dad == NULL) {
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."));
return;
}
// find the children of the LCA that lead from it to the a and b
Inkscape::XML::Node *as = AncetreFils(a, dad);
Inkscape::XML::Node *bs = AncetreFils(b, dad);
// find out which comes first
for (Inkscape::XML::Node *child = dad->firstChild(); child; child = child->next()) {
if (child == as) {
/* a first, so reverse. */
reverseOrderForOp = true;
break;
}
if (child == bs)
break;
}
}
}
il = g_slist_copy(il);
// first check if all the input objects have shapes
// otherwise bail out
for (GSList *l = il; l != NULL; l = l->next)
{
SPItem *item = SP_ITEM(l->data);
if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
{
desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("One of the objects is <b>not a path</b>, cannot perform boolean operation."));
g_slist_free(il);
return;
}
}
// extract the livarot Paths from the source objects
// also get the winding rule specified in the style
int nbOriginaux = g_slist_length(il);
Path *originaux[nbOriginaux];
FillRule origWind[nbOriginaux];
int curOrig;
{
curOrig = 0;
for (GSList *l = il; l != NULL; l = l->next)
{
SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(il->data), "style");
gchar const *val = sp_repr_css_property(css, "fill-rule", NULL);
if (val && strcmp(val, "nonzero") == 0) {
origWind[curOrig]= fill_nonZero;
} else if (val && strcmp(val, "evenodd") == 0) {
origWind[curOrig]= fill_oddEven;
} else {
origWind[curOrig]= fill_nonZero;
}
originaux[curOrig] = Path_for_item((SPItem *) l->data, true, true);
if (originaux[curOrig] == NULL || originaux[curOrig]->descr_cmd.size() <= 1)
{
for (int i = curOrig; i >= 0; i--) delete originaux[i];
g_slist_free(il);
return;
}
curOrig++;
}
}
// reverse if needed
// note that the selection list keeps its order
if ( reverseOrderForOp ) {
Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
FillRule swai=origWind[0]; origWind[0]=origWind[1]; origWind[1]=swai;
}
// and work
// some temporary instances, first
Shape *theShapeA = new Shape;
Shape *theShapeB = new Shape;
Shape *theShape = new Shape;
Path *res = new Path;
res->SetBackData(false);
Path::cut_position *toCut=NULL;
int nbToCut=0;
if ( bop == bool_op_inters || bop == bool_op_union || bop == bool_op_diff || bop == bool_op_symdiff ) {
// true boolean op
// get the polygons of each path, with the winding rule specified, and apply the operation iteratively
originaux[0]->ConvertWithBackData(0.1);
originaux[0]->Fill(theShape, 0);
theShapeA->ConvertToShape(theShape, origWind[0]);
curOrig = 1;
for (GSList *l = il->next; l != NULL; l = l->next) {
originaux[curOrig]->ConvertWithBackData(0.1);
originaux[curOrig]->Fill(theShape, curOrig);
theShapeB->ConvertToShape(theShape, origWind[curOrig]);
// les elements arrivent en ordre inverse dans la liste
theShape->Booleen(theShapeB, theShapeA, bop);
{
Shape *swap = theShape;
theShape = theShapeA;
theShapeA = swap;
}
curOrig++;
}
{
Shape *swap = theShape;
theShape = theShapeA;
theShapeA = swap;
}
} else if ( bop == bool_op_cut ) {
// cuts= sort of a bastard boolean operation, thus not the axact same modus operandi
// technically, the cut path is not necessarily a polygon (thus has no winding rule)
// it is just uncrossed, and cleaned from duplicate edges and points
// then it's fed to Booleen() which will uncross it against the other path
// then comes the trick: each edge of the cut path is duplicated (one in each direction),
// thus making a polygon. the weight of the edges of the cut are all 0, but
// the Booleen need to invert the ones inside the source polygon (for the subsequent
// ConvertToForme)
// the cut path needs to have the highest pathID in the back data
// that's how the Booleen() function knows it's an edge of the cut
// FIXME: this gives poor results, the final paths are full of extraneous nodes. Decreasing
// ConvertWithBackData parameter below simply increases the number of nodes, so for now I
// left it at 1.0. Investigate replacing this by a combination of difference and
// intersection of the same two paths. -- bb
{
Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
int swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
}
originaux[0]->ConvertWithBackData(1.0);
originaux[0]->Fill(theShape, 0);
theShapeA->ConvertToShape(theShape, origWind[0]);
originaux[1]->ConvertWithBackData(1.0);
originaux[1]->Fill(theShape, 1,false,false,false); //do not closeIfNeeded
theShapeB->ConvertToShape(theShape, fill_justDont); // fill_justDont doesn't computes winding numbers
// les elements arrivent en ordre inverse dans la liste
theShape->Booleen(theShapeB, theShapeA, bool_op_cut, 1);
} else if ( bop == bool_op_slice ) {
// slice is not really a boolean operation
// you just put the 2 shapes in a single polygon, uncross it
// the points where the degree is > 2 are intersections
// just check it's an intersection on the path you want to cut, and keep it
// the intersections you have found are then fed to ConvertPositionsToMoveTo() which will
// make new subpath at each one of these positions
// inversion pour l'opŽration
{
Path* swap=originaux[0];originaux[0]=originaux[1];originaux[1]=swap;
int swai=origWind[0];origWind[0]=origWind[1];origWind[1]=(fill_typ)swai;
}
originaux[0]->ConvertWithBackData(1.0);
originaux[0]->Fill(theShapeA, 0,false,false,false); // don't closeIfNeeded
originaux[1]->ConvertWithBackData(1.0);
originaux[1]->Fill(theShapeA, 1,true,false,false);// don't closeIfNeeded and just dump in the shape, don't reset it
theShape->ConvertToShape(theShapeA, fill_justDont);
if ( theShape->hasBackData() ) {
// should always be the case, but ya never know
{
for (int i = 0; i < theShape->numberOfPoints(); i++) {
if ( theShape->getPoint(i).totalDegree() > 2 ) {
// possibly an intersection
// we need to check that at least one edge from the source path is incident to it
// before we declare it's an intersection
int cb = theShape->getPoint(i).incidentEdge[FIRST];
int nbOrig=0;
int nbOther=0;
int piece=-1;
float t=0.0;
while ( cb >= 0 && cb < theShape->numberOfEdges() ) {
if ( theShape->ebData[cb].pathID == 0 ) {
// the source has an edge incident to the point, get its position on the path
piece=theShape->ebData[cb].pieceID;
if ( theShape->getEdge(cb).st == i ) {
t=theShape->ebData[cb].tSt;
} else {
t=theShape->ebData[cb].tEn;
}
nbOrig++;
}
if ( theShape->ebData[cb].pathID == 1 ) nbOther++; // the cut is incident to this point
cb=theShape->NextAt(i, cb);
}
if ( nbOrig > 0 && nbOther > 0 ) {
// point incident to both path and cut: an intersection
// note that you only keep one position on the source; you could have degenerate
// cases where the source crosses itself at this point, and you wouyld miss an intersection
toCut=(Path::cut_position*)realloc(toCut, (nbToCut+1)*sizeof(Path::cut_position));
toCut[nbToCut].piece=piece;
toCut[nbToCut].t=t;
nbToCut++;
}
}
}
}
{
// i think it's useless now
int i = theShape->numberOfEdges() - 1;
for (;i>=0;i--) {
if ( theShape->ebData[i].pathID == 1 ) {
theShape->SubEdge(i);
}
}
}
}
}
int* nesting=NULL;
int* conts=NULL;
int nbNest=0;
// pour compenser le swap juste avant
if ( bop == bool_op_slice ) {
// theShape->ConvertToForme(res, nbOriginaux, originaux, true);
// res->ConvertForcedToMoveTo();
res->Copy(originaux[0]);
res->ConvertPositionsToMoveTo(nbToCut, toCut); // cut where you found intersections
free(toCut);
} else if ( bop == bool_op_cut ) {
// il faut appeler pour desallouer PointData (pas vital, mais bon)
// the Booleen() function did not deallocated the point_data array in theShape, because this
// function needs it.
// this function uses the point_data to get the winding number of each path (ie: is a hole or not)
// for later reconstruction in objects, you also need to extract which path is parent of holes (nesting info)
theShape->ConvertToFormeNested(res, nbOriginaux, originaux, 1, nbNest, nesting, conts);
} else {
theShape->ConvertToForme(res, nbOriginaux, originaux);
}
delete theShape;
delete theShapeA;
delete theShapeB;
for (int i = 0; i < nbOriginaux; i++) delete originaux[i];
if (res->descr_cmd.size() <= 1)
{
// only one command, presumably a moveto: it isn't a path
for (GSList *l = il; l != NULL; l = l->next)
{
SP_OBJECT(l->data)->deleteObject();
}
sp_document_done(sp_desktop_document(desktop));
selection->clear();
delete res;
g_slist_free(il);
return;
}
// remember important aspects of the source path, to be restored
Inkscape::XML::Node *repr_source;
if ( bop == bool_op_diff || bop == bool_op_symdiff || bop == bool_op_cut || bop == bool_op_slice ) {
if (reverseOrderForOp) {
repr_source = SP_OBJECT_REPR(il->data);
} else {
repr_source = SP_OBJECT_REPR(il->next->data);
}
} else {
// find out the bottom object
GSList *sorted = g_slist_copy((GSList *) selection->reprList());
sorted = g_slist_sort(sorted, (GCompareFunc) sp_repr_compare_position);
repr_source = ((Inkscape::XML::Node *) sorted->data);
g_slist_free(sorted);
}
gint pos = repr_source->position();
Inkscape::XML::Node *parent = sp_repr_parent(repr_source);
char const *id = repr_source->attribute("id");
char const *style = repr_source->attribute("style");
// remove source paths
selection->clear();
for (GSList *l = il; l != NULL; l = l->next) {
// if this is the bottommost object,
if (!strcmp(SP_OBJECT_REPR(l->data)->attribute("id"), id)) {
// delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
SP_OBJECT(l->data)->deleteObject(false);
} else {
// delete the object for real, so that its clones can take appropriate action
SP_OBJECT(l->data)->deleteObject();
}
}
g_slist_free(il);
// premultiply by the inverse of parent's repr
SPItem *parent_item = SP_ITEM(sp_desktop_document(desktop)->getObjectByRepr(parent));
NR::Matrix local = sp_item_i2doc_affine(parent_item);
gchar affinestr[80];
gchar *transform = NULL;
if (!local.test_identity() && sp_svg_transform_write(affinestr, 79, local.inverse())) {
transform = affinestr;
}
// now that we have the result, add it on the canvas
if ( bop == bool_op_cut || bop == bool_op_slice ) {
int nbRP=0;
Path** resPath;
if ( bop == bool_op_slice ) {
// there are moveto's at each intersection, but it's still one unique path
// so break it down and add each subpath independently
// we could call break_apart to do this, but while we have the description...
resPath=res->SubPaths(nbRP, false);
} else {
// cut operation is a bit wicked: you need to keep holes
// that's why you needed the nesting
// ConvertToFormeNested() dumped all the subpath in a single Path "res", so we need
// to get the path for each part of the polygon. that's why you need the nesting info:
// to know in wich subpath to add a subpath
resPath=res->SubPathsWithNesting(nbRP, true, nbNest, nesting, conts);
// cleaning
if ( conts ) free(conts);
if ( nesting ) free(nesting);
}
// add all the pieces resulting from cut or slice
for (int i=0;i<nbRP;i++) {
gchar *d = resPath[i]->svg_dump_path();
Inkscape::XML::Node *repr = sp_repr_new("svg:path");
repr->setAttribute("style", style);
repr->setAttribute("d", d);
g_free(d);
// for slice, remove fill
if (bop == bool_op_slice) {
SPCSSAttr *css;
css = sp_repr_css_attr_new();
sp_repr_css_set_property(css, "fill", "none");
sp_repr_css_change(repr, css, "style");
sp_repr_css_attr_unref(css);
}
// we assign the same id on all pieces, but it on adding to document, it will be changed on all except one
// this means it's basically random which of the pieces inherits the original's id and clones
// a better algorithm might figure out e.g. the biggest piece
repr->setAttribute("id", id);
repr->setAttribute("transform", transform);
// add the new repr to the parent
parent->appendChild(repr);
// move to the saved position
repr->setPosition(pos > 0 ? pos : 0);
selection->add(repr);
Inkscape::GC::release(repr);
delete resPath[i];
}
if ( resPath ) free(resPath);
} else {
gchar *d = res->svg_dump_path();
Inkscape::XML::Node *repr = sp_repr_new("svg:path");
repr->setAttribute("style", style);
repr->setAttribute("d", d);
g_free(d);
repr->setAttribute("transform", transform);
repr->setAttribute("id", id);
parent->appendChild(repr);
repr->setPosition(pos > 0 ? pos : 0);
selection->add(repr);
Inkscape::GC::release(repr);
}
sp_document_done(sp_desktop_document(desktop));
delete res;
}
void
sp_selected_path_outline()
{
SPDesktop *desktop = SP_ACTIVE_DESKTOP;
Inkscape::Selection *selection = sp_desktop_selection(desktop);
if (selection->isEmpty()) {
// TRANSLATORS: "to outline" means "to convert stroke to path"
desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to outline."));
return;
}
bool did = false;
for (GSList *items = g_slist_copy((GSList *) selection->itemList());
items != NULL;
items = items->next) {
SPItem *item = (SPItem *) items->data;
if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
continue;
SPCurve *curve = NULL;
if (SP_IS_SHAPE(item)) {
curve = sp_shape_get_curve(SP_SHAPE(item));
if (curve == NULL)
continue;
}
if (SP_IS_TEXT(item)) {
curve = SP_TEXT(item)->getNormalizedBpath();
if (curve == NULL)
continue;
}
{ // pas de stroke pas de chocolat
SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
gchar const *val = sp_repr_css_property(css, "stroke", NULL);
if (val == NULL || strcmp(val, "none") == 0) {
sp_curve_unref(curve);
continue;
}
}
// remember old stroke style, to be set on fill
SPCSSAttr *ncss;
{
SPCSSAttr *ocss = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
gchar const *val = sp_repr_css_property(ocss, "stroke", NULL);
gchar const *opac = sp_repr_css_property(ocss, "stroke-opacity", NULL);
ncss = sp_repr_css_attr_new();
sp_repr_css_set_property(ncss, "stroke", "none");
sp_repr_css_set_property(ncss, "stroke-opacity", "1.0");
sp_repr_css_set_property(ncss, "fill", val);
if ( opac ) {
sp_repr_css_set_property(ncss, "fill-opacity", opac);
} else {
sp_repr_css_set_property(ncss, "fill-opacity", "1.0");
}
}
NR::Matrix const transform(item->transform);
gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
float o_width, o_miter;
JoinType o_join;
ButtType o_butt;
{
SPStyle *i_style = SP_OBJECT(item)->style;
int jointype, captype;
jointype = i_style->stroke_linejoin.computed;
captype = i_style->stroke_linecap.computed;
o_width = i_style->stroke_width.computed;
switch (jointype) {
case SP_STROKE_LINEJOIN_MITER:
o_join = join_pointy;
break;
case SP_STROKE_LINEJOIN_ROUND:
o_join = join_round;
break;
default:
o_join = join_straight;
break;
}
switch (captype) {
case SP_STROKE_LINECAP_SQUARE:
o_butt = butt_square;
break;
case SP_STROKE_LINECAP_ROUND:
o_butt = butt_round;
break;
default:
o_butt = butt_straight;
break;
}
if (o_width < 0.1)
o_width = 0.1;
o_miter = i_style->stroke_miterlimit.value * o_width;
}
Path *orig = Path_for_item(item, false);
if (orig == NULL) {
g_free(style);
sp_curve_unref(curve);
continue;
}
Path *res = new Path;
res->SetBackData(false);
{
orig->Outline(res, 0.5 * o_width, o_join, o_butt, 0.5 * o_miter);
orig->Coalesce(0.5 * o_width);
Shape *theShape = new Shape;
Shape *theRes = new Shape;
res->ConvertWithBackData(1.0);
res->Fill(theShape, 0);
theRes->ConvertToShape(theShape, fill_positive);
Path *originaux[1];
originaux[0] = res;
theRes->ConvertToForme(orig, 1, originaux);
delete theShape;
delete theRes;
}
if (orig->descr_cmd.size() <= 1) {
// ca a merdŽ, ou bien le resultat est vide
delete res;
delete orig;
g_free(style);
continue;
}
did = true;
sp_curve_unref(curve);
// remember the position of the item
gint pos = SP_OBJECT_REPR(item)->position();
// remember parent
Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
// remember id
char const *id = SP_OBJECT_REPR(item)->attribute("id");
selection->remove(item);
SP_OBJECT(item)->deleteObject(false);
if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
Inkscape::XML::Node *repr = sp_repr_new("svg:path");
// restore old style
repr->setAttribute("style", style);
// set old stroke style on fill
sp_repr_css_change(repr, ncss, "style");
sp_repr_css_attr_unref(ncss);
gchar *str = orig->svg_dump_path();
repr->setAttribute("d", str);
g_free(str);
// add the new repr to the parent
parent->appendChild(repr);
// move to the saved position
repr->setPosition(pos > 0 ? pos : 0);
repr->setAttribute("id", id);
SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
sp_item_write_transform(newitem, repr, transform);
selection->add(repr);
Inkscape::GC::release(repr);
}
delete res;
delete orig;
g_free(style);
}
if (did) {
sp_document_done(sp_desktop_document(desktop));
} else {
// TRANSLATORS: "to outline" means "to convert stroke to path"
desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No stroked paths</b> to outline in the selection."));
return;
}
}
void
sp_selected_path_offset()
{
double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
sp_selected_path_do_offset(true, prefOffset);
}
void
sp_selected_path_inset()
{
double prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", 1.0);
sp_selected_path_do_offset(false, prefOffset);
}
void
sp_selected_path_offset_screen(double pixels)
{
sp_selected_path_do_offset(true, pixels / SP_ACTIVE_DESKTOP->current_zoom());
}
void
sp_selected_path_inset_screen(double pixels)
{
sp_selected_path_do_offset(false, pixels / SP_ACTIVE_DESKTOP->current_zoom());
}
void sp_selected_path_create_offset_object_zero()
{
sp_selected_path_create_offset_object(0, false);
}
void sp_selected_path_create_offset()
{
sp_selected_path_create_offset_object(1, false);
}
void sp_selected_path_create_inset()
{
sp_selected_path_create_offset_object(-1, false);
}
void sp_selected_path_create_updating_offset_object_zero()
{
sp_selected_path_create_offset_object(0, true);
}
void sp_selected_path_create_updating_offset()
{
sp_selected_path_create_offset_object(1, true);
}
void sp_selected_path_create_updating_inset()
{
sp_selected_path_create_offset_object(-1, true);
}
void
sp_selected_path_create_offset_object(int expand, bool updating)
{
Inkscape::Selection *selection;
Inkscape::XML::Node *repr;
SPItem *item;
SPCurve *curve;
gchar *style, *str;
SPDesktop *desktop;
float o_width, o_miter;
JoinType o_join;
ButtType o_butt;
curve = NULL;
desktop = SP_ACTIVE_DESKTOP;
selection = sp_desktop_selection(desktop);
item = selection->singleItem();
if (item == NULL || ( !SP_IS_SHAPE(item) && !SP_IS_TEXT(item) ) ) {
desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("Selected object is <b>not a path</b>, cannot inset/outset."));
return;
}
if (SP_IS_SHAPE(item))
{
curve = sp_shape_get_curve(SP_SHAPE(item));
if (curve == NULL)
return;
}
if (SP_IS_TEXT(item))
{
curve = SP_TEXT(item)->getNormalizedBpath();
if (curve == NULL)
return;
}
NR::Matrix const transform(item->transform);
sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
// remember the position of the item
gint pos = SP_OBJECT_REPR(item)->position();
// remember parent
Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
{
SPStyle *i_style = SP_OBJECT(item)->style;
int jointype, captype;
jointype = i_style->stroke_linejoin.value;
captype = i_style->stroke_linecap.value;
o_width = i_style->stroke_width.computed;
if (jointype == SP_STROKE_LINEJOIN_MITER)
{
o_join = join_pointy;
}
else if (jointype == SP_STROKE_LINEJOIN_ROUND)
{
o_join = join_round;
}
else
{
o_join = join_straight;
}
if (captype == SP_STROKE_LINECAP_SQUARE)
{
o_butt = butt_square;
}
else if (captype == SP_STROKE_LINECAP_ROUND)
{
o_butt = butt_round;
}
else
{
o_butt = butt_straight;
}
{
double prefOffset = 1.0;
prefOffset = prefs_get_double_attribute("options.defaultoffsetwidth", "value", prefOffset);
o_width = prefOffset;
}
if (o_width < 0.01)
o_width = 0.01;
o_miter = i_style->stroke_miterlimit.value * o_width;
}
Path *orig = Path_for_item(item, true, false);
if (orig == NULL)
{
g_free(style);
sp_curve_unref(curve);
return;
}
Path *res = new Path;
res->SetBackData(false);
{
Shape *theShape = new Shape;
Shape *theRes = new Shape;
orig->ConvertWithBackData(1.0);
orig->Fill(theShape, 0);
SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
gchar const *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;
theRes->ConvertToForme(res, 1, originaux);
delete theShape;
delete theRes;
}
sp_curve_unref(curve);
if (res->descr_cmd.size() <= 1)
{
// pas vraiment de points sur le resultat
// donc il ne reste rien
sp_document_done(sp_desktop_document(desktop));
selection->clear();
delete res;
delete orig;
g_free(style);
return;
}
{
gchar tstr[80];
tstr[79] = '\0';
repr = sp_repr_new("svg:path");
repr->setAttribute("sodipodi:type", "inkscape:offset");
sp_repr_set_svg_double(repr, "inkscape:radius", ( expand > 0
? o_width
: expand < 0
? -o_width
: 0 ));
str = res->svg_dump_path();
repr->setAttribute("inkscape:original", str);
g_free(str);
if ( updating ) {
char const *id = SP_OBJECT(item)->repr->attribute("id");
char const *uri = g_strdup_printf("#%s", id);
repr->setAttribute("xlink:href", uri);
g_free((void *) uri);
} else {
repr->setAttribute("inkscape:href", NULL);
}
repr->setAttribute("style", style);
// add the new repr to the parent
parent->appendChild(repr);
// move to the saved position
repr->setPosition(pos > 0 ? pos : 0);
SPItem *nitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
if ( updating ) {
// on conserve l'original
// we reapply the transform to the original (offset will feel it)
sp_item_write_transform(item, SP_OBJECT_REPR(item), transform);
} else {
// delete original, apply the transform to the offset
SP_OBJECT(item)->deleteObject(false);
sp_item_write_transform(nitem, repr, transform);
}
// The object just created from a temporary repr is only a seed.
// We need to invoke its write which will update its real repr (in particular adding d=)
SP_OBJECT(nitem)->updateRepr();
Inkscape::GC::release(repr);
selection->set(nitem);
}
sp_document_done(sp_desktop_document(desktop));
delete res;
delete orig;
g_free(style);
}
void
sp_selected_path_do_offset(bool expand, double prefOffset)
{
SPDesktop *desktop = SP_ACTIVE_DESKTOP;
Inkscape::Selection *selection = sp_desktop_selection(desktop);
if (selection->isEmpty()) {
desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to inset/outset."));
return;
}
bool did = false;
for (GSList *items = g_slist_copy((GSList *) selection->itemList());
items != NULL;
items = items->next) {
SPItem *item = (SPItem *) items->data;
if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item))
continue;
SPCurve *curve = NULL;
if (SP_IS_SHAPE(item)) {
curve = sp_shape_get_curve(SP_SHAPE(item));
if (curve == NULL)
continue;
}
if (SP_IS_TEXT(item)) {
curve = SP_TEXT(item)->getNormalizedBpath();
if (curve == NULL)
continue;
}
NR::Matrix const transform(item->transform);
sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
float o_width, o_miter;
JoinType o_join;
ButtType o_butt;
{
SPStyle *i_style = SP_OBJECT(item)->style;
int jointype, captype;
jointype = i_style->stroke_linejoin.value;
captype = i_style->stroke_linecap.value;
o_width = i_style->stroke_width.computed;
switch (jointype) {
case SP_STROKE_LINEJOIN_MITER:
o_join = join_pointy;
break;
case SP_STROKE_LINEJOIN_ROUND:
o_join = join_round;
break;
default:
o_join = join_straight;
break;
}
switch (captype) {
case SP_STROKE_LINECAP_SQUARE:
o_butt = butt_square;
break;
case SP_STROKE_LINECAP_ROUND:
o_butt = butt_round;
break;
default:
o_butt = butt_straight;
break;
}
o_width = prefOffset;
if (o_width < 0.1)
o_width = 0.1;
o_miter = i_style->stroke_miterlimit.value * o_width;
}
Path *orig = Path_for_item(item, false);
if (orig == NULL) {
g_free(style);
sp_curve_unref(curve);
continue;
}
Path *res = new Path;
res->SetBackData(false);
{
Shape *theShape = new Shape;
Shape *theRes = new Shape;
orig->ConvertWithBackData(0.03);
orig->Fill(theShape, 0);
SPCSSAttr *css = sp_repr_css_attr(SP_OBJECT_REPR(item), "style");
gchar const *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);
}
// et maintenant: offset
// methode inexacte
/* Path *originaux[1];
originaux[0] = orig;
theRes->ConvertToForme(res, 1, originaux);
if (expand) {
res->OutsideOutline(orig, 0.5 * o_width, o_join, o_butt, o_miter);
} else {
res->OutsideOutline(orig, -0.5 * o_width, o_join, o_butt, o_miter);
}
orig->ConvertWithBackData(1.0);
orig->Fill(theShape, 0);
theRes->ConvertToShape(theShape, fill_positive);
originaux[0] = orig;
theRes->ConvertToForme(res, 1, originaux);
if (o_width >= 0.5) {
// res->Coalesce(1.0);
res->ConvertEvenLines(1.0);
res->Simplify(1.0);
} else {
// res->Coalesce(o_width);
res->ConvertEvenLines(1.0*o_width);
res->Simplify(1.0 * o_width);
} */
// methode par makeoffset
if (expand)
{
theShape->MakeOffset(theRes, o_width, o_join, o_miter);
}
else
{
theShape->MakeOffset(theRes, -o_width, o_join, o_miter);
}
theRes->ConvertToShape(theShape, fill_positive);
res->Reset();
theRes->ConvertToForme(res);
if (o_width >= 1.0)
{
res->ConvertEvenLines(1.0);
res->Simplify(1.0);
}
else
{
res->ConvertEvenLines(1.0*o_width);
res->Simplify(1.0 * o_width);
}
delete theShape;
delete theRes;
}
did = true;
sp_curve_unref(curve);
// remember the position of the item
gint pos = SP_OBJECT_REPR(item)->position();
// remember parent
Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
// remember id
char const *id = SP_OBJECT_REPR(item)->attribute("id");
selection->remove(item);
SP_OBJECT(item)->deleteObject(false);
if (res->descr_cmd.size() > 1) { // if there's 0 or 1 node left, drop this path altogether
gchar tstr[80];
tstr[79] = '\0';
Inkscape::XML::Node *repr = sp_repr_new("svg:path");
repr->setAttribute("style", style);
gchar *str = res->svg_dump_path();
repr->setAttribute("d", str);
g_free(str);
// add the new repr to the parent
parent->appendChild(repr);
// move to the saved position
repr->setPosition(pos > 0 ? pos : 0);
SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
// reapply the transform
sp_item_write_transform(newitem, repr, transform);
repr->setAttribute("id", id);
selection->add(repr);
Inkscape::GC::release(repr);
}
delete orig;
delete res;
}
if (did) {
sp_document_done(sp_desktop_document(desktop));
} else {
desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to inset/outset in the selection."));
return;
}
}
//return true if we changed something, else false
bool
sp_selected_path_simplify_item(SPDesktop *desktop, Inkscape::Selection *selection, SPItem *item,
float threshold, bool justCoalesce,
float angleLimit, bool breakableAngles,
gdouble size, bool modifySelection)
{
if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
return false;
//If this is a group, do the children instead
if (SP_IS_GROUP(item)) {
bool didSomething = false;
for ( GSList *children = sp_item_group_item_list(SP_GROUP(item));
children ; children = children->next) {
SPItem *child = (SPItem *) children->data;
didSomething |= sp_selected_path_simplify_item(desktop, selection, child, threshold, justCoalesce,
angleLimit, breakableAngles, size, false);
}
return didSomething;
}
SPCurve *curve = NULL;
if (SP_IS_SHAPE(item)) {
curve = sp_shape_get_curve(SP_SHAPE(item));
if (!curve)
return false;
}
if (SP_IS_TEXT(item)) {
curve = SP_TEXT(item)->getNormalizedBpath();
if (!curve)
return false;
}
// save the transform, to re-apply it after simplification
NR::Matrix const transform(item->transform);
/*
reset the transform, effectively transforming the item by transform.inverse();
this is necessary so that the item is transformed twice back and forth,
allowing all compensations to cancel out regardless of the preferences
*/
sp_item_write_transform(item, SP_OBJECT_REPR(item), NR::identity());
gchar *style = g_strdup(SP_OBJECT_REPR(item)->attribute("style"));
Path *orig = Path_for_item(item, false);
if (orig == NULL) {
g_free(style);
sp_curve_unref(curve);
return false;
}
sp_curve_unref(curve);
// remember the position of the item
gint pos = SP_OBJECT_REPR(item)->position();
// remember parent
Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
// remember id
char const *id = SP_OBJECT_REPR(item)->attribute("id");
//If a group was selected, to not change the selection list
if (modifySelection)
selection->remove(item);
SP_OBJECT(item)->deleteObject(false);
if ( justCoalesce ) {
orig->Coalesce(threshold * size);
} else {
orig->ConvertEvenLines(threshold * size);
orig->Simplify(threshold * size);
}
Inkscape::XML::Node *repr = sp_repr_new("svg:path");
repr->setAttribute("style", style);
gchar *str = orig->svg_dump_path();
repr->setAttribute("d", str);
g_free(str);
// restore id
repr->setAttribute("id", id);
// add the new repr to the parent
parent->appendChild(repr);
// move to the saved position
repr->setPosition(pos > 0 ? pos : 0);
SPItem *newitem = (SPItem *) sp_desktop_document(desktop)->getObjectByRepr(repr);
// reapply the transform
sp_item_write_transform(newitem, repr, transform);
//If we are not in a selected group
if (modifySelection)
selection->add(repr);
Inkscape::GC::release(repr);
// clean up
if (orig) delete orig;
return true;
}
void
sp_selected_path_simplify_selection(float threshold, bool justCoalesce,
float angleLimit, bool breakableAngles)
{
SPDesktop *desktop = SP_ACTIVE_DESKTOP;
Inkscape::Selection *selection = sp_desktop_selection(desktop);
if (selection->isEmpty()) {
desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE,
_("Select <b>path(s)</b> to simplify."));
return;
}
// remember selection size
NR::Rect bbox = selection->bounds();
gdouble size = L2(bbox.dimensions());
bool didSomething = false;
//Loop through all of the items in the selection
for (GSList *items = g_slist_copy((GSList *) selection->itemList());
items != NULL; items = items->next) {
SPItem *item = (SPItem *) items->data;
if (!(SP_IS_GROUP(item) || SP_IS_SHAPE(item) || SP_IS_TEXT(item)))
continue;
didSomething |= sp_selected_path_simplify_item(desktop, selection, item,
threshold, justCoalesce, angleLimit, breakableAngles, size, true);
}
if (didSomething)
sp_document_done(sp_desktop_document(desktop));
else
desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to simplify in the selection."));
}
// globals for keeping track of accelerated simplify
static double previousTime = 0.0;
static gdouble simplifyMultiply = 1.0;
void
sp_selected_path_simplify(void)
{
gdouble simplifyThreshold =
prefs_get_double_attribute("options.simplifythreshold", "value", 0.003);
bool simplifyJustCoalesce =
(bool) prefs_get_int_attribute("options.simplifyjustcoalesce", "value", 0);
//Get the current time
GTimeVal currentTimeVal;
g_get_current_time(&currentTimeVal);
double currentTime = currentTimeVal.tv_sec * 1000000 +
currentTimeVal.tv_usec;
//Was the previous call to this function recent? (<0.5 sec)
if (previousTime > 0.0 && currentTime - previousTime < 500000.0) {
// add to the threshold 1/2 of its original value
simplifyMultiply += 0.5;
simplifyThreshold *= simplifyMultiply;
} else {
// reset to the default
simplifyMultiply = 1;
}
//remember time for next call
previousTime = currentTime;
//g_print("%g\n", simplify_threshold);
//Make the actual call
sp_selected_path_simplify_selection(simplifyThreshold,
simplifyJustCoalesce, 0.0, false);
}
// fonctions utilitaires
bool
Ancetre(Inkscape::XML::Node *a, Inkscape::XML::Node *who)
{
if (who == NULL || a == NULL)
return false;
if (who == a)
return true;
return Ancetre(sp_repr_parent(a), who);
}
Path *
Path_for_item(SPItem *item, bool doTransformation, bool transformFull)
{
SPCurve *curve;
if (!item)
return NULL;
if (SP_IS_SHAPE(item))
{
curve = sp_shape_get_curve(SP_SHAPE(item));
}
else if (SP_IS_TEXT(item))
{
curve = SP_TEXT(item)->getNormalizedBpath();
}
else
{
curve = NULL;
}
if (!curve)
return NULL;
NArtBpath *bpath = curve->bpath;
if (bpath == NULL)
return NULL;
if ( doTransformation ) {
if (transformFull)
bpath = nr_artpath_affine(curve->bpath, sp_item_i2doc_affine(item));
else
bpath = nr_artpath_affine(curve->bpath, item->transform);
sp_curve_unref(curve);
curve=NULL;
} else {
bpath=curve->bpath;
}
Path *dest = new Path;
dest->SetBackData(false);
{
int i;
bool closed = false;
float lastX = 0.0;
float lastY = 0.0;
for (i = 0; bpath[i].code != NR_END; i++) {
switch (bpath[i].code) {
case NR_LINETO:
lastX = bpath[i].x3;
lastY = bpath[i].y3;
{
NR::Point tmp(lastX, lastY);
dest->LineTo(tmp);
}
break;
case NR_CURVETO:
{
NR::Point tmp, tms, tme;
tmp[0]=bpath[i].x3;
tmp[1]=bpath[i].y3;
tms[0]=3 * (bpath[i].x1 - lastX);
tms[1]=3 * (bpath[i].y1 - lastY);
tme[0]=3 * (bpath[i].x3 - bpath[i].x2);
tme[1]=3 * (bpath[i].y3 - bpath[i].y2);
dest->CubicTo(tmp,tms,tme);
}
lastX = bpath[i].x3;
lastY = bpath[i].y3;
break;
case NR_MOVETO_OPEN:
case NR_MOVETO:
if (closed)
dest->Close();
closed = (bpath[i].code == NR_MOVETO);
lastX = bpath[i].x3;
lastY = bpath[i].y3;
{
NR::Point tmp(lastX, lastY);
dest->MoveTo(tmp);
}
break;
default:
break;
}
}
if (closed)
dest->Close();
}
if ( doTransformation ) {
if ( bpath ) nr_free(bpath);
} else {
sp_curve_unref(curve);
}
return dest;
}
NR::Maybe<Path::cut_position> get_nearest_position_on_Path(Path *path, NR::Point p)
{
//get nearest position on path
Path::cut_position pos = path->PointToCurvilignPosition(p);
return pos;
}
NR::Point get_point_on_Path(Path *path, int piece, double t)
{
NR::Point p;
path->PointAt(piece, t, p);
return p;
}
/*
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:encoding=utf-8:textwidth=99 :