#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include "live_effects/lpe-patternalongpath.h"

#include "live_effects/effect.h"

#include "live_effects/lpe-bendpath.h"

#include "live_effects/lpe-sketch.h"

#include "live_effects/lpe-vonkoch.h"

#include "live_effects/lpe-knot.h"

#include "live_effects/lpe-rough-hatches.h"

#include "live_effects/lpe-dynastroke.h"

#include "live_effects/lpe-test-doEffect-stack.h"

#include "live_effects/lpe-gears.h"

#include "live_effects/lpe-curvestitch.h"

#include "live_effects/lpe-circle_with_radius.h"

#include "live_effects/lpe-perspective_path.h"

#include "live_effects/lpe-spiro.h"

#include "live_effects/lpe-lattice.h"

#include "live_effects/lpe-lattice2.h"

#include "live_effects/lpe-simplify.h"

#include "live_effects/lpe-envelope.h"

#include "live_effects/lpe-constructgrid.h"

#include "live_effects/lpe-perp_bisector.h"

#include "live_effects/lpe-tangent_to_curve.h"

#include "live_effects/lpe-mirror_symmetry.h"

#include "live_effects/lpe-circle_3pts.h"

#include "live_effects/lpe-angle_bisector.h"

#include "live_effects/lpe-parallel.h"

#include "live_effects/lpe-copy_rotate.h"

#include "live_effects/lpe-offset.h"

#include "live_effects/lpe-ruler.h"

#include "live_effects/lpe-boolops.h"

#include "live_effects/lpe-interpolate.h"

#include "live_effects/lpe-text_label.h"

#include "live_effects/lpe-path_length.h"

#include "live_effects/lpe-line_segment.h"

#include "live_effects/lpe-recursiveskeleton.h"

#include "live_effects/lpe-extrude.h"

#include "live_effects/lpe-powerstroke.h"

#include "live_effects/lpe-clone-original.h"

#include "live_effects/lpe-bspline.h"

#include "live_effects/lpe-attach-path.h"

#include "live_effects/lpe-fill-between-strokes.h"

#include "live_effects/lpe-fill-between-many.h"

#include "live_effects/lpe-ellipse_5pts.h"

#include "live_effects/lpe-bounding-box.h"

#include "live_effects/lpe-jointype.h"

#include "live_effects/lpe-taperstroke.h"

#include "live_effects/lpe-envelope-perspective.h"

#include "live_effects/lpe-fillet-chamfer.h"

#include "xml/node-event-vector.h"

#include "sp-object.h"

#include "attributes.h"

#include "message-stack.h"

#include "desktop.h"

#include "inkscape.h"

#include "document.h"

#include "document-private.h"

#include "xml/document.h"

#include <glibmm/i18n.h>

#include "ui/tools/pen-tool.h"

#include "tools-switch.h"

#include "message-stack.h"

#include "desktop.h"

#include "knotholder.h"

#include "sp-lpe-item.h"

#include "live_effects/lpeobject.h"

#include "live_effects/parameter/parameter.h"

#include <glibmm/ustring.h>

#include "display/curve.h"

#include <exception>

#include <2geom/sbasis-to-bezier.h>

#include <2geom/affine.h>

#include <2geom/pathvector.h>

namespace Inkscape {

namespace LivePathEffect {

const Util::EnumData<EffectType> LPETypeData[] = {

// {constant defined in effect-enum.h, N_("name of your effect"), "name of your effect in SVG"}

#ifdef LPE_ENABLE_TEST_EFFECTS

{DOEFFECTSTACK_TEST, N_("doEffect stack test"), "doeffectstacktest"},

{ANGLE_BISECTOR, N_("Angle bisector"), "angle_bisector"},

// TRANSLATORS: boolean operations

{BOOLOPS, N_("Boolops"), "boolops"},

{CIRCLE_WITH_RADIUS, N_("Circle (by center and radius)"), "circle_with_radius"},

{CIRCLE_3PTS, N_("Circle by 3 points"), "circle_3pts"},

{DYNASTROKE, N_("Dynamic stroke"), "dynastroke"},

{EXTRUDE, N_("Extrude"), "extrude"},

{LATTICE, N_("Lattice Deformation"), "lattice"},

{LINE_SEGMENT, N_("Line Segment"), "line_segment"},

{MIRROR_SYMMETRY, N_("Mirror symmetry"), "mirror_symmetry"},

{OFFSET, N_("Offset"), "offset"},

{PARALLEL, N_("Parallel"), "parallel"},

{PATH_LENGTH, N_("Path length"), "path_length"},

{PERP_BISECTOR, N_("Perpendicular bisector"), "perp_bisector"},

{PERSPECTIVE_PATH, N_("Perspective path"), "perspective_path"},

{COPY_ROTATE, N_("Rotate copies"), "copy_rotate"},

{RECURSIVE_SKELETON, N_("Recursive skeleton"), "recursive_skeleton"},

{TANGENT_TO_CURVE, N_("Tangent to curve"), "tangent_to_curve"},

{TEXT_LABEL, N_("Text label"), "text_label"},

#endif

{BEND_PATH, N_("Bend"), "bend_path"},

{GEARS, N_("Gears"), "gears"},

{PATTERN_ALONG_PATH, N_("Pattern Along Path"), "skeletal"}, // for historic reasons, this effect is called skeletal(strokes) in Inkscape:SVG

{CURVE_STITCH, N_("Stitch Sub-Paths"), "curvestitching"},

{VONKOCH, N_("VonKoch"), "vonkoch"},

{KNOT, N_("Knot"), "knot"},

{CONSTRUCT_GRID, N_("Construct grid"), "construct_grid"},

{SPIRO, N_("Spiro spline"), "spiro"},

{ENVELOPE, N_("Envelope Deformation"), "envelope"},

{INTERPOLATE, N_("Interpolate Sub-Paths"), "interpolate"},

{ROUGH_HATCHES, N_("Hatches (rough)"), "rough_hatches"},

{SKETCH, N_("Sketch"), "sketch"},

{RULER, N_("Ruler"), "ruler"},

{POWERSTROKE, N_("Power stroke"), "powerstroke"},

{CLONE_ORIGINAL, N_("Clone original path"), "clone_original"},

{BSPLINE, N_("BSpline"), "bspline"},

{JOIN_TYPE, N_("Join type"), "join_type"},

{TAPER_STROKE, N_("Taper stroke"), "taper_stroke"},

{ATTACH_PATH, N_("Attach path"), "attach_path"},

{FILL_BETWEEN_STROKES, N_("Fill between strokes"), "fill_between_strokes"},

{FILL_BETWEEN_MANY, N_("Fill between many"), "fill_between_many"},

{ELLIPSE_5PTS, N_("Ellipse by 5 points"), "ellipse_5pts"},

{BOUNDING_BOX, N_("Bounding Box"), "bounding_box"},

{SIMPLIFY, N_("Simplify"), "simplify"},

{LATTICE2, N_("Lattice Deformation 2"), "lattice2"},

{ENVELOPE_PERSPECTIVE, N_("Envelope-Perspective"), "envelope-perspective"},

};

const Util::EnumDataConverter<EffectType> LPETypeConverter(LPETypeData, sizeof(LPETypeData)/sizeof(*LPETypeData));

Effect::acceptsNumClicks(EffectType type) {

switch (type) {

case INVALID_LPE: return -1; // in case we want to distinguish between invalid LPE and valid ones that expect zero clicks

case ANGLE_BISECTOR: return 3;

case CIRCLE_3PTS: return 3;

case CIRCLE_WITH_RADIUS: return 2;

case LINE_SEGMENT: return 2;

case PERP_BISECTOR: return 2;

default: return 0;

}

}

Effect*

Effect::New(EffectType lpenr, LivePathEffectObject *lpeobj)

{

Effect* neweffect = NULL;

switch (lpenr) {

case PATTERN_ALONG_PATH:

neweffect = static_cast<Effect*> ( new LPEPatternAlongPath(lpeobj) );

break;

case BEND_PATH:

neweffect = static_cast<Effect*> ( new LPEBendPath(lpeobj) );

break;

case SKETCH:

neweffect = static_cast<Effect*> ( new LPESketch(lpeobj) );

break;

case ROUGH_HATCHES:

neweffect = static_cast<Effect*> ( new LPERoughHatches(lpeobj) );

break;

case VONKOCH:

neweffect = static_cast<Effect*> ( new LPEVonKoch(lpeobj) );

break;

case KNOT:

neweffect = static_cast<Effect*> ( new LPEKnot(lpeobj) );

break;

case GEARS:

neweffect = static_cast<Effect*> ( new LPEGears(lpeobj) );

break;

case CURVE_STITCH:

neweffect = static_cast<Effect*> ( new LPECurveStitch(lpeobj) );

break;

case LATTICE:

neweffect = static_cast<Effect*> ( new LPELattice(lpeobj) );

break;

case ENVELOPE:

neweffect = static_cast<Effect*> ( new LPEEnvelope(lpeobj) );

break;

case CIRCLE_WITH_RADIUS:

neweffect = static_cast<Effect*> ( new LPECircleWithRadius(lpeobj) );

break;

case PERSPECTIVE_PATH:

neweffect = static_cast<Effect*> ( new LPEPerspectivePath(lpeobj) );

break;

case SPIRO:

neweffect = static_cast<Effect*> ( new LPESpiro(lpeobj) );

break;

case CONSTRUCT_GRID:

neweffect = static_cast<Effect*> ( new LPEConstructGrid(lpeobj) );

break;

case PERP_BISECTOR:

neweffect = static_cast<Effect*> ( new LPEPerpBisector(lpeobj) );

break;

case TANGENT_TO_CURVE:

neweffect = static_cast<Effect*> ( new LPETangentToCurve(lpeobj) );

break;

case MIRROR_SYMMETRY:

neweffect = static_cast<Effect*> ( new LPEMirrorSymmetry(lpeobj) );

break;

case CIRCLE_3PTS:

neweffect = static_cast<Effect*> ( new LPECircle3Pts(lpeobj) );

break;

case ANGLE_BISECTOR:

neweffect = static_cast<Effect*> ( new LPEAngleBisector(lpeobj) );

break;

case PARALLEL:

neweffect = static_cast<Effect*> ( new LPEParallel(lpeobj) );

break;

case COPY_ROTATE:

neweffect = static_cast<Effect*> ( new LPECopyRotate(lpeobj) );

break;

case OFFSET:

neweffect = static_cast<Effect*> ( new LPEOffset(lpeobj) );

break;

case RULER:

neweffect = static_cast<Effect*> ( new LPERuler(lpeobj) );

break;

case BOOLOPS:

neweffect = static_cast<Effect*> ( new LPEBoolops(lpeobj) );

break;

case INTERPOLATE:

neweffect = static_cast<Effect*> ( new LPEInterpolate(lpeobj) );

break;

case TEXT_LABEL:

neweffect = static_cast<Effect*> ( new LPETextLabel(lpeobj) );

break;

case PATH_LENGTH:

neweffect = static_cast<Effect*> ( new LPEPathLength(lpeobj) );

break;

case LINE_SEGMENT:

neweffect = static_cast<Effect*> ( new LPELineSegment(lpeobj) );

break;

case DOEFFECTSTACK_TEST:

neweffect = static_cast<Effect*> ( new LPEdoEffectStackTest(lpeobj) );

break;

case BSPLINE:

neweffect = static_cast<Effect*> ( new LPEBSpline(lpeobj) );

break;

case DYNASTROKE:

neweffect = static_cast<Effect*> ( new LPEDynastroke(lpeobj) );

break;

case RECURSIVE_SKELETON:

neweffect = static_cast<Effect*> ( new LPERecursiveSkeleton(lpeobj) );

break;

case EXTRUDE:

neweffect = static_cast<Effect*> ( new LPEExtrude(lpeobj) );

break;

case POWERSTROKE:

neweffect = static_cast<Effect*> ( new LPEPowerStroke(lpeobj) );

break;

case CLONE_ORIGINAL:

neweffect = static_cast<Effect*> ( new LPECloneOriginal(lpeobj) );

break;

case ATTACH_PATH:

neweffect = static_cast<Effect*> ( new LPEAttachPath(lpeobj) );

break;

case FILL_BETWEEN_STROKES:

neweffect = static_cast<Effect*> ( new LPEFillBetweenStrokes(lpeobj) );

break;

case FILL_BETWEEN_MANY:

neweffect = static_cast<Effect*> ( new LPEFillBetweenMany(lpeobj) );

break;

case ELLIPSE_5PTS:

neweffect = static_cast<Effect*> ( new LPEEllipse5Pts(lpeobj) );

break;

case BOUNDING_BOX:

neweffect = static_cast<Effect*> ( new LPEBoundingBox(lpeobj) );

break;

case JOIN_TYPE:

neweffect = static_cast<Effect*> ( new LPEJoinType(lpeobj) );

break;

case TAPER_STROKE:

neweffect = static_cast<Effect*> ( new LPETaperStroke(lpeobj) );

break;

case SIMPLIFY:

neweffect = static_cast<Effect*> ( new LPESimplify(lpeobj) );

break;

case LATTICE2:

neweffect = static_cast<Effect*> ( new LPELattice2(lpeobj) );

break;

case ENVELOPE_PERSPECTIVE:

neweffect = static_cast<Effect*> ( new LPEEnvelopePerspective(lpeobj) );

break;

case FILLET_CHAMFER:

neweffect = static_cast<Effect*> ( new LPEFilletChamfer(lpeobj) );

break;

default:

g_warning("LivePathEffect::Effect::New called with invalid patheffect type (%d)", lpenr);

neweffect = NULL;

break;

}

if (neweffect) {

neweffect->readallParameters(lpeobj->getRepr());

}

return neweffect;

}

void Effect::createAndApply(const char* name, SPDocument *doc, SPItem *item)

{

// Path effect definition

Inkscape::XML::Document *xml_doc = doc->getReprDoc();

Inkscape::XML::Node *repr = xml_doc->createElement("inkscape:path-effect");

repr->setAttribute("effect", name);

doc->getDefs()->getRepr()->addChild(repr, NULL); // adds to <defs> and assigns the 'id' attribute

const gchar * repr_id = repr->attribute("id");

Inkscape::GC::release(repr);

gchar *href = g_strdup_printf("#%s", repr_id);

SP_LPE_ITEM(item)->addPathEffect(href, true);

g_free(href);

}

Effect::createAndApply(EffectType type, SPDocument *doc, SPItem *item)

{

createAndApply(LPETypeConverter.get_key(type).c_str(), doc, item);

}

Effect::Effect(LivePathEffectObject *lpeobject)

: _provides_knotholder_entities(false),

oncanvasedit_it(0),

is_visible(_("Is visible?"), _("If unchecked, the effect remains applied to the object but is temporarily disabled on canvas"), "is_visible", &wr, this, true),

show_orig_path(false),

lpeobj(lpeobject),

concatenate_before_pwd2(false),

provides_own_flash_paths(true), // is automatically set to false if providesOwnFlashPaths() is not overridden

is_ready(false) // is automatically set to false if providesOwnFlashPaths() is not overridden

{

registerParameter( dynamic_cast<Parameter *>(&is_visible) );

is_visible.widget_is_visible = false;

}

Effect::~Effect()

{

}

Glib::ustring

Effect::getName() const

{

if (lpeobj->effecttype_set && LPETypeConverter.is_valid_id(lpeobj->effecttype) )

return Glib::ustring( _(LPETypeConverter.get_label(lpeobj->effecttype).c_str()) );

else

return Glib::ustring( _("No effect") );

}

Effect::effectType() const {

return lpeobj->effecttype;

}

Effect::doOnApply (SPLPEItem const*/*lpeitem*/)

{

}

Effect::doBeforeEffect (SPLPEItem const*/*lpeitem*/)

{

//Do nothing for simple effects

}

void Effect::doAfterEffect (SPLPEItem const* lpeitem)

{

}

void Effect::doOnRemove (SPLPEItem const* lpeitem)

{

}

void Effect::doOnApply_impl(SPLPEItem const* lpeitem)

{

sp_lpe_item = const_cast<SPLPEItem *>(lpeitem);

/*sp_curve = SP_SHAPE(sp_lpe_item)->getCurve();

doOnApply(lpeitem);

}

void Effect::doBeforeEffect_impl(SPLPEItem const* lpeitem)

{

sp_lpe_item = const_cast<SPLPEItem *>(lpeitem);

//printf("(SPLPEITEM*) %p\n", sp_lpe_item);

sp_curve = SP_SHAPE(sp_lpe_item)->getCurve();

pathvector_before_effect = sp_curve->get_pathvector();

doBeforeEffect(lpeitem);

}

Effect::doAcceptPathPreparations(SPLPEItem *lpeitem)

{

// switch to pen context

SPDesktop *desktop = inkscape_active_desktop(); // TODO: Is there a better method to find the item's desktop?

if (!tools_isactive(desktop, TOOLS_FREEHAND_PEN)) {

tools_switch(desktop, TOOLS_FREEHAND_PEN);

}

Inkscape::UI::Tools::ToolBase *ec = desktop->event_context;

Inkscape::UI::Tools::PenTool *pc = SP_PEN_CONTEXT(ec);

pc->expecting_clicks_for_LPE = this->acceptsNumClicks();

pc->waiting_LPE = this;

pc->waiting_item = lpeitem;

pc->polylines_only = true;

ec->desktop->messageStack()->flash(Inkscape::INFORMATION_MESSAGE,

g_strdup_printf(_("Please specify a parameter path for the LPE '%s' with %d mouse clicks"),

getName().c_str(), acceptsNumClicks()));

}

Effect::writeParamsToSVG() {

std::vector<Inkscape::LivePathEffect::Parameter *>::iterator p;

for (p = param_vector.begin(); p != param_vector.end(); ++p) {

(*p)->write_to_SVG();

}

}

Effect::acceptParamPath (SPPath const*/*param_path*/) {

setReady();

}

Effect::doEffect (SPCurve * curve)

{

std::vector<Geom::Path> orig_pathv = curve->get_pathvector();

std::vector<Geom::Path> result_pathv = doEffect_path(orig_pathv);

curve->set_pathvector(result_pathv);

}

std::vector<Geom::Path>

Effect::doEffect_path (std::vector<Geom::Path> const & path_in)

{

std::vector<Geom::Path> path_out;

if ( !concatenate_before_pwd2 ) {

// default behavior

for (unsigned int i=0; i < path_in.size(); i++) {

Geom::Piecewise<Geom::D2<Geom::SBasis> > pwd2_in = path_in[i].toPwSb();

Geom::Piecewise<Geom::D2<Geom::SBasis> > pwd2_out = doEffect_pwd2(pwd2_in);

std::vector<Geom::Path> path = Geom::path_from_piecewise( pwd2_out, LPE_CONVERSION_TOLERANCE);

// add the output path vector to the already accumulated vector:

for (unsigned int j=0; j < path.size(); j++) {

path_out.push_back(path[j]);

}

}

} else {

// concatenate the path into possibly discontinuous pwd2

Geom::Piecewise<Geom::D2<Geom::SBasis> > pwd2_in;

for (unsigned int i=0; i < path_in.size(); i++) {

pwd2_in.concat( path_in[i].toPwSb() );

}

Geom::Piecewise<Geom::D2<Geom::SBasis> > pwd2_out = doEffect_pwd2(pwd2_in);

path_out = Geom::path_from_piecewise( pwd2_out, LPE_CONVERSION_TOLERANCE);

}

return path_out;

}

Geom::Piecewise<Geom::D2<Geom::SBasis> >

Effect::doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in)

{

g_warning("Effect has no doEffect implementation");

return pwd2_in;

}

Effect::readallParameters(Inkscape::XML::Node const* repr)

{

std::vector<Parameter *>::iterator it = param_vector.begin();

while (it != param_vector.end()) {

Parameter * param = *it;

const gchar * key = param->param_key.c_str();

const gchar * value = repr->attribute(key);

if (value) {

bool accepted = param->param_readSVGValue(value);

if (!accepted) {

g_warning("Effect::readallParameters - '%s' not accepted for %s", value, key);

}

} else {

// set default value

param->param_set_default();

}

++it;

}

}

Effect::setParameter(const gchar * key, const gchar * new_value)

{

Parameter * param = getParameter(key);

if (param) {

if (new_value) {

bool accepted = param->param_readSVGValue(new_value);

if (!accepted) {

g_warning("Effect::setParameter - '%s' not accepted for %s", new_value, key);

}

} else {

// set default value

param->param_set_default();

}

}

}

Effect::registerParameter(Parameter * param)

{

param_vector.push_back(param);

}

Effect::addHandles(KnotHolder *knotholder, SPDesktop *desktop, SPItem *item) {

using namespace Inkscape::LivePathEffect;

// add handles provided by the effect itself

addKnotHolderEntities(knotholder, desktop, item);

// add handles provided by the effect's parameters (if any)

for (std::vector<Parameter *>::iterator p = param_vector.begin(); p != param_vector.end(); ++p) {

(*p)->addKnotHolderEntities(knotholder, desktop, item);

}

}

std::vector<Geom::PathVector>

Effect::getCanvasIndicators(SPLPEItem const* lpeitem)

{

std::vector<Geom::PathVector> hp_vec;

// add indicators provided by the effect itself

addCanvasIndicators(lpeitem, hp_vec);

// add indicators provided by the effect's parameters

for (std::vector<Parameter *>::iterator p = param_vector.begin(); p != param_vector.end(); ++p) {

(*p)->addCanvasIndicators(lpeitem, hp_vec);

}

return hp_vec;

}

Effect::addCanvasIndicators(SPLPEItem const*/*lpeitem*/, std::vector<Geom::PathVector> &/*hp_vec*/)

{

}

Gtk::Widget *

Effect::newWidget()

{

// use manage here, because after deletion of Effect object, others might still be pointing to this widget.

Gtk::VBox * vbox = Gtk::manage( new Gtk::VBox() );

vbox->set_border_width(5);

std::vector<Parameter *>::iterator it = param_vector.begin();

while (it != param_vector.end()) {

if ((*it)->widget_is_visible) {

Parameter * param = *it;

Gtk::Widget * widg = param->param_newWidget();

Glib::ustring * tip = param->param_getTooltip();

if (widg) {

vbox->pack_start(*widg, true, true, 2);

if (tip) {

widg->set_tooltip_text(*tip);

} else {

widg->set_tooltip_text("");

widg->set_has_tooltip(false);

}

}

}

++it;

}

return dynamic_cast<Gtk::Widget *>(vbox);

}

Inkscape::XML::Node *Effect::getRepr()

{

return lpeobj->getRepr();

}

SPDocument *Effect::getSPDoc()

{

if (lpeobj->document == NULL) {

g_message("Effect::getSPDoc() returns NULL");

}

return lpeobj->document;

}

Parameter *

Effect::getParameter(const char * key)

{

Glib::ustring stringkey(key);

std::vector<Parameter *>::iterator it = param_vector.begin();

while (it != param_vector.end()) {

Parameter * param = *it;

if ( param->param_key == key) {

return param;

}

++it;

}

return NULL;

}

Parameter *

Effect::getNextOncanvasEditableParam()

{

if (param_vector.size() == 0) // no parameters

return NULL;

oncanvasedit_it++;

if (oncanvasedit_it >= static_cast<int>(param_vector.size())) {

oncanvasedit_it = 0;

}

int old_it = oncanvasedit_it;

do {

Parameter * param = param_vector[oncanvasedit_it];

if(param && param->oncanvas_editable) {

return param;

} else {

oncanvasedit_it++;

if (oncanvasedit_it == static_cast<int>(param_vector.size())) { // loop round the map

oncanvasedit_it = 0;

}

}

} while (oncanvasedit_it != old_it); // iterate until complete loop through map has been made

return NULL;

}

Effect::editNextParamOncanvas(SPItem * item, SPDesktop * desktop)

{

if (!desktop) return;

Parameter * param = getNextOncanvasEditableParam();

if (param) {

param->param_editOncanvas(item, desktop);

gchar *message = g_strdup_printf(_("Editing parameter <b>%s</b>."), param->param_label.c_str());

desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, message);

g_free(message);

} else {

desktop->messageStack()->flash( Inkscape::WARNING_MESSAGE,

_("None of the applied path effect's parameters can be edited on-canvas.") );

}

}

Effect::resetDefaults(SPItem const* /*item*/)

{

std::vector<Inkscape::LivePathEffect::Parameter *>::iterator p;

for (p = param_vector.begin(); p != param_vector.end(); ++p) {

(*p)->param_set_default();

(*p)->write_to_SVG();

}

}

Effect::transform_multiply(Geom::Affine const& postmul, bool set)

{

// cycle through all parameters. Most parameters will not need transformation, but path and point params do.

for (std::vector<Parameter *>::iterator it = param_vector.begin(); it != param_vector.end(); ++it) {

Parameter * param = *it;

param->param_transform_multiply(postmul, set);

}

}

Effect::providesKnotholder() const

{

// does the effect actively provide any knotholder entities of its own?

if (_provides_knotholder_entities) {

return true;

}

// otherwise: are there any parameters that have knotholderentities?

for (std::vector<Parameter *>::const_iterator p = param_vector.begin(); p != param_vector.end(); ++p) {

if ((*p)->providesKnotHolderEntities()) {

return true;

}

}

return false;

}

} /* namespace LivePathEffect */

} /* namespace Inkscape */