/*
* Base class for shapes, including <path> element
*
* Author:
* Lauris Kaplinski <lauris@kaplinski.com>
* Abhishek Sharma
*
* Copyright (C) 1999-2002 Lauris Kaplinski
* Copyright (C) 2000-2001 Ximian, Inc.
* Copyright (C) 2004 John Cliff
* Copyright (C) 2007-2008 Johan Engelen
* Copyright (C) 2010 Jon A. Cruz <jon@joncruz.org>
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <2geom/rect.h>
#include <2geom/transforms.h>
#include <2geom/pathvector.h>
#include <2geom/path-intersection.h>
#include <2geom/exception.h>
#include "helper/geom.h"
#include "helper/geom-nodetype.h"
#include <sigc++/functors/ptr_fun.h>
#include <sigc++/adaptors/bind.h>
#include "macros.h"
#include "display/drawing-shape.h"
#include "display/curve.h"
#include "print.h"
#include "document.h"
#include "style.h"
#include "sp-marker.h"
#include "sp-path.h"
#include "preferences.h"
#include "attributes.h"
#include "live_effects/lpeobject.h"
#include "uri.h"
#include "extract-uri.h"
#include "uri-references.h"
#include "bad-uri-exception.h"
#include "xml/repr.h"
#include "helper/mathfns.h" // for triangle_area()
#include "splivarot.h" // for bounding box calculation
#define noSHAPE_VERBOSE
static void sp_shape_update_marker_view (SPShape *shape, Inkscape::DrawingItem *ai);
SPShape::SPShape() : SPLPEItem() {
for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) {
this->_marker[i] = NULL;
}
this->_curve = NULL;
this->_curve_before_lpe = NULL;
}
SPShape::~SPShape() {
for ( int i = 0 ; i < SP_MARKER_LOC_QTY ; i++ ) {
this->_release_connect[i].disconnect();
this->_modified_connect[i].disconnect();
}
}
void SPShape::build(SPDocument *document, Inkscape::XML::Node *repr) {
SPLPEItem::build(document, repr);
for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
sp_shape_set_marker (this, i, this->style->marker_ptrs[i]->value);
}
}
/**
* Removes, releases and unrefs all children of object
*
* This is the inverse of sp_shape_build(). It must be invoked as soon
* as the shape is removed from the tree, even if it is still referenced
* by other objects. This routine also disconnects/unrefs markers and
* curves attached to it.
*
* \see SPObject::release()
*/
void SPShape::release() {
for (int i = 0; i < SP_MARKER_LOC_QTY; i++) {
if (this->_marker[i]) {
for (SPItemView *v = this->display; v != NULL; v = v->next) {
sp_marker_hide(_marker[i], v->arenaitem->key() + i);
}
this->_release_connect[i].disconnect();
this->_modified_connect[i].disconnect();
_marker[i] = static_cast<SPMarker *>(sp_object_hunref(_marker[i], this));
}
}
if (this->_curve) {
this->_curve = this->_curve->unref();
}
if (this->_curve_before_lpe) {
this->_curve_before_lpe = this->_curve_before_lpe->unref();
}
SPLPEItem::release();
}
void SPShape::set(unsigned int key, const gchar* value) {
SPLPEItem::set(key, value);
}
Inkscape::XML::Node* SPShape::write(Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) {
SPLPEItem::write(xml_doc, repr, flags);
return repr;
}
void SPShape::update(SPCtx* ctx, guint flags) {
// std::cout << "SPShape::update(): " << (getId()?getId():"null") << std::endl;
SPLPEItem::update(ctx, flags);
/* This stanza checks that an object's marker style agrees with
* the marker objects it has allocated. sp_shape_set_marker ensures
* that the appropriate marker objects are present (or absent) to
* match the style.
*/
for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
sp_shape_set_marker (this, i, this->style->marker_ptrs[i]->value);
}
if (flags & (SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) {
if (this->style->stroke_width.unit == SP_CSS_UNIT_PERCENT) {
SPItemCtx *ictx = (SPItemCtx *) ctx;
double const aw = 1.0 / ictx->i2vp.descrim();
this->style->stroke_width.computed = this->style->stroke_width.value * aw;
for (SPItemView *v = ((SPItem *) (this))->display; v != NULL; v = v->next) {
Inkscape::DrawingShape *sh = dynamic_cast<Inkscape::DrawingShape *>(v->arenaitem);
if (hasMarkers()) {
this->context_style = this->style;
sh->setStyle(this->style, this->context_style);
// Done at end:
// sh->setChildrenStyle(this->context_style); //Resolve 'context-xxx' in children.
} else if (this->parent) {
this->context_style = this->parent->context_style;
sh->setStyle(this->style, this->context_style);
}
}
}
}
if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_PARENT_MODIFIED_FLAG)) {
/* This is suboptimal, because changing parent style schedules recalculation */
/* But on the other hand - how can we know that parent does not tie style and transform */
for (SPItemView *v = this->display; v != NULL; v = v->next) {
Inkscape::DrawingShape *sh = dynamic_cast<Inkscape::DrawingShape *>(v->arenaitem);
if (flags & SP_OBJECT_MODIFIED_FLAG) {
sh->setPath(this->_curve);
}
}
}
if (this->hasMarkers ()) {
/* Dimension marker views */
for (SPItemView *v = this->display; v != NULL; v = v->next) {
if (!v->arenaitem->key()) {
v->arenaitem->setKey(SPItem::display_key_new (SP_MARKER_LOC_QTY));
}
for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
if (_marker[i]) {
sp_marker_show_dimension(_marker[i],
v->arenaitem->key() + i,
numberOfMarkers(i));
}
}
}
/* Update marker views */
for (SPItemView *v = this->display; v != NULL; v = v->next) {
sp_shape_update_marker_view (this, v->arenaitem);
}
// Marker selector needs this here or marker previews are not rendered.
for (SPItemView *v = this->display; v != NULL; v = v->next) {
Inkscape::DrawingShape *sh = dynamic_cast<Inkscape::DrawingShape *>(v->arenaitem);
sh->setChildrenStyle(this->context_style); // Resolve 'context-xxx' in children.
}
}
}
/**
* Calculate the transform required to get a marker's path object in the
* right place for particular path segment on a shape.
*
* \see sp_shape_marker_update_marker_view.
*
* From SVG spec:
* The axes of the temporary new user coordinate system are aligned according to the orient attribute on the 'marker'
* element and the slope of the curve at the given vertex. (Note: if there is a discontinuity at a vertex, the slope
* is the average of the slopes of the two segments of the curve that join at the given vertex. If a slope cannot be
* determined, the slope is assumed to be zero.)
*
* Reference: http://www.w3.org/TR/SVG11/painting.html#MarkerElement, the `orient' attribute.
* Reference for behaviour of zero-length segments:
* http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes
*/
Geom::Affine sp_shape_marker_get_transform(Geom::Curve const & c1, Geom::Curve const & c2)
{
Geom::Point p = c1.pointAt(1);
Geom::Curve * c1_reverse = c1.reverse();
Geom::Point tang1 = - c1_reverse->unitTangentAt(0);
delete c1_reverse;
Geom::Point tang2 = c2.unitTangentAt(0);
double const angle1 = Geom::atan2(tang1);
double const angle2 = Geom::atan2(tang2);
double ret_angle = .5 * (angle1 + angle2);
if ( fabs( angle2 - angle1 ) > M_PI ) {
/* ret_angle is in the middle of the larger of the two sectors between angle1 and
* angle2, so flip it by 180degrees to force it to the middle of the smaller sector.
*
* (Imagine a circle with rays drawn at angle1 and angle2 from the centre of the
* circle. Those two rays divide the circle into two sectors.)
*/
ret_angle += M_PI;
}
return Geom::Rotate(ret_angle) * Geom::Translate(p);
}
Geom::Affine sp_shape_marker_get_transform_at_start(Geom::Curve const & c)
{
Geom::Point p = c.pointAt(0);
Geom::Affine ret = Geom::Translate(p);
if ( !c.isDegenerate() ) {
Geom::Point tang = c.unitTangentAt(0);
double const angle = Geom::atan2(tang);
ret = Geom::Rotate(angle) * Geom::Translate(p);
} else {
/* FIXME: the svg spec says to search for a better alternative than zero angle directionality:
* http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */
}
return ret;
}
Geom::Affine sp_shape_marker_get_transform_at_end(Geom::Curve const & c)
{
Geom::Point p = c.pointAt(1);
Geom::Affine ret = Geom::Translate(p);
if ( !c.isDegenerate() ) {
Geom::Curve * c_reverse = c.reverse();
Geom::Point tang = - c_reverse->unitTangentAt(0);
delete c_reverse;
double const angle = Geom::atan2(tang);
ret = Geom::Rotate(angle) * Geom::Translate(p);
} else {
/* FIXME: the svg spec says to search for a better alternative than zero angle directionality:
* http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes */
}
return ret;
}
/**
* Updates the instances (views) of a given marker in a shape.
* Marker views have to be scaled already. The transformation
* is retrieved and then shown by calling sp_marker_show_instance.
*
* @todo figure out what to do when both 'marker' and for instance 'marker-end' are set.
*/
static void
sp_shape_update_marker_view(SPShape *shape, Inkscape::DrawingItem *ai)
{
// position arguments to sp_marker_show_instance, basically counts the amount of markers.
int counter[4] = {0};
if (!shape->_curve) return;
Geom::PathVector const & pathv = shape->_curve->get_pathvector();
if (pathv.empty()) return;
// the first vertex should get a start marker, the last an end marker, and all the others a mid marker
// see bug 456148
// START marker
{
Geom::Affine const m (sp_shape_marker_get_transform_at_start(pathv.begin()->front()));
for (int i = 0; i < 2; i++) { // SP_MARKER_LOC and SP_MARKER_LOC_START
if ( shape->_marker[i] ) {
Geom::Affine m_auto = m;
// Reverse start marker if necessary.
if (shape->_marker[i]->orient_mode == MARKER_ORIENT_AUTO_START_REVERSE) {
m_auto = Geom::Rotate::from_degrees( 180.0 ) * m;
}
sp_marker_show_instance(shape->_marker[i], ai,
ai->key() + i, counter[i], m_auto,
shape->style->stroke_width.computed);
counter[i]++;
}
}
}
// MID marker
if (shape->_marker[SP_MARKER_LOC_MID] || shape->_marker[SP_MARKER_LOC]) {
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
// START position
if ( path_it != pathv.begin()
&& ! ((path_it == (pathv.end()-1)) && (path_it->size_default() == 0)) ) // if this is the last path and it is a moveto-only, don't draw mid marker there
{
Geom::Affine const m (sp_shape_marker_get_transform_at_start(path_it->front()));
for (int i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
if ( shape->_marker[i] ) {
sp_marker_show_instance(shape->_marker[i], ai,
ai->key() + i, counter[i], m,
shape->style->stroke_width.computed);
counter[i]++;
}
}
}
// MID position
if ( path_it->size_default() > 1) {
Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
while (curve_it2 != path_it->end_default())
{
/* Put marker between curve_it1 and curve_it2.
* Loop to end_default (so including closing segment), because when a path is closed,
* there should be a midpoint marker between last segment and closing straight line segment
*/
Geom::Affine const m (sp_shape_marker_get_transform(*curve_it1, *curve_it2));
for (int i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
if (shape->_marker[i]) {
sp_marker_show_instance(shape->_marker[i], ai,
ai->key() + i, counter[i], m,
shape->style->stroke_width.computed);
counter[i]++;
}
}
++curve_it1;
++curve_it2;
}
}
// END position
if ( path_it != (pathv.end()-1) && !path_it->empty()) {
Geom::Curve const &lastcurve = path_it->back_default();
Geom::Affine const m = sp_shape_marker_get_transform_at_end(lastcurve);
for (int i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
if (shape->_marker[i]) {
sp_marker_show_instance(shape->_marker[i], ai,
ai->key() + i, counter[i], m,
shape->style->stroke_width.computed);
counter[i]++;
}
}
}
}
}
// END marker
if ( shape->_marker[SP_MARKER_LOC_END] || shape->_marker[SP_MARKER_LOC] ) {
/* Get reference to last curve in the path.
* For moveto-only path, this returns the "closing line segment". */
Geom::Path const &path_last = pathv.back();
unsigned int index = path_last.size_default();
if (index > 0) {
index--;
}
Geom::Curve const &lastcurve = path_last[index];
Geom::Affine const m = sp_shape_marker_get_transform_at_end(lastcurve);
for (int i = 0; i < 4; i += 3) { // SP_MARKER_LOC and SP_MARKER_LOC_END
if (shape->_marker[i]) {
sp_marker_show_instance(shape->_marker[i], ai,
ai->key() + i, counter[i], m,
shape->style->stroke_width.computed);
counter[i]++;
}
}
}
}
void SPShape::modified(unsigned int flags) {
// std::cout << "SPShape::modified(): " << (getId()?getId():"null") << std::endl;
SPLPEItem::modified(flags);
if (flags & SP_OBJECT_STYLE_MODIFIED_FLAG) {
for (SPItemView *v = this->display; v != NULL; v = v->next) {
Inkscape::DrawingShape *sh = dynamic_cast<Inkscape::DrawingShape *>(v->arenaitem);
if (hasMarkers()) {
this->context_style = this->style;
sh->setStyle(this->style, this->context_style);
// Note: marker selector preview does not trigger SP_OBJECT_STYLE_MODIFIED_FLAG so
// this is not called when marker previews are generated, however there is code in
// SPShape::update() that calls this routine so we don't worry about it here.
sh->setChildrenStyle(this->context_style); // Resolve 'context-xxx' in children.
} else if (this->parent) {
this->context_style = this->parent->context_style;
sh->setStyle(this->style, this->context_style);
}
}
}
}
Geom::OptRect SPShape::bbox(Geom::Affine const &transform, SPItem::BBoxType bboxtype) const {
Geom::OptRect bbox;
if (!this->_curve) {
return bbox;
}
bbox = bounds_exact_transformed(this->_curve->get_pathvector(), transform);
if (!bbox) {
return bbox;
}
if (bboxtype == SPItem::VISUAL_BBOX) {
// convert the stroke to a path and calculate that path's geometric bbox
if (!this->style->stroke.isNone()) {
Geom::PathVector *pathv = item_outline(this, true); // calculate bbox_only
if (pathv) {
bbox |= bounds_exact_transformed(*pathv, transform);
delete pathv;
}
}
// Union with bboxes of the markers, if any
if ( this->hasMarkers() && !this->_curve->get_pathvector().empty() ) {
/** \todo make code prettier! */
Geom::PathVector const & pathv = this->_curve->get_pathvector();
// START marker
for (unsigned i = 0; i < 2; i++) { // SP_MARKER_LOC and SP_MARKER_LOC_START
if ( this->_marker[i] ) {
SPItem* marker_item = sp_item_first_item_child( _marker[i] );
if (marker_item) {
Geom::Affine tr(sp_shape_marker_get_transform_at_start(pathv.begin()->front()));
if (_marker[i]->orient_mode == MARKER_ORIENT_AUTO_START_REVERSE) {
// Reverse start marker if necessary
tr = Geom::Rotate::from_degrees( 180.0 ) * tr;
} else if (_marker[i]->orient_mode == MARKER_ORIENT_ANGLE) {
Geom::Point transl = tr.translation();
tr = Geom::Rotate::from_degrees(_marker[i]->orient.computed) * Geom::Translate(transl);
}
if (_marker[i]->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
tr = Geom::Scale(this->style->stroke_width.computed) * tr;
}
// total marker transform
tr = marker_item->transform * _marker[i]->c2p * tr * transform;
// get bbox of the marker with that transform
bbox |= marker_item->visualBounds(tr);
}
}
}
// MID marker
for (unsigned i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
if ( !this->_marker[i] ) {
continue;
}
SPMarker* marker = _marker[i];
SPItem* marker_item = sp_item_first_item_child( marker );
if ( !marker_item ) {
continue;
}
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
// START position
if ( path_it != pathv.begin()
&& ! ((path_it == (pathv.end()-1)) && (path_it->size_default() == 0)) ) // if this is the last path and it is a moveto-only, there is no mid marker there
{
Geom::Affine tr(sp_shape_marker_get_transform_at_start(path_it->front()));
if (marker->orient_mode == MARKER_ORIENT_ANGLE) {
Geom::Point transl = tr.translation();
tr = Geom::Rotate::from_degrees(marker->orient.computed) * Geom::Translate(transl);
}
if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
tr = Geom::Scale(this->style->stroke_width.computed) * tr;
}
tr = marker_item->transform * marker->c2p * tr * transform;
bbox |= marker_item->visualBounds(tr);
}
// MID position
if ( path_it->size_default() > 1) {
Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
while (curve_it2 != path_it->end_default())
{
/* Put marker between curve_it1 and curve_it2.
* Loop to end_default (so including closing segment), because when a path is closed,
* there should be a midpoint marker between last segment and closing straight line segment */
SPMarker* marker = _marker[i];
SPItem* marker_item = sp_item_first_item_child( marker );
if (marker_item) {
Geom::Affine tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
if (marker->orient_mode == MARKER_ORIENT_ANGLE) {
Geom::Point transl = tr.translation();
tr = Geom::Rotate::from_degrees(marker->orient.computed) * Geom::Translate(transl);
}
if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
tr = Geom::Scale(this->style->stroke_width.computed) * tr;
}
tr = marker_item->transform * marker->c2p * tr * transform;
bbox |= marker_item->visualBounds(tr);
}
++curve_it1;
++curve_it2;
}
}
// END position
if ( path_it != (pathv.end()-1) && !path_it->empty()) {
Geom::Curve const &lastcurve = path_it->back_default();
Geom::Affine tr = sp_shape_marker_get_transform_at_end(lastcurve);
if (marker->orient_mode == MARKER_ORIENT_ANGLE) {
Geom::Point transl = tr.translation();
tr = Geom::Rotate::from_degrees(marker->orient.computed) * Geom::Translate(transl);
}
if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
tr = Geom::Scale(this->style->stroke_width.computed) * tr;
}
tr = marker_item->transform * marker->c2p * tr * transform;
bbox |= marker_item->visualBounds(tr);
}
}
}
// END marker
for (unsigned i = 0; i < 4; i += 3) { // SP_MARKER_LOC and SP_MARKER_LOC_END
if ( _marker[i] ) {
SPMarker* marker = _marker[i];
SPItem* marker_item = sp_item_first_item_child( marker );
if (marker_item) {
/* Get reference to last curve in the path.
* For moveto-only path, this returns the "closing line segment". */
Geom::Path const &path_last = pathv.back();
unsigned int index = path_last.size_default();
if (index > 0) {
index--;
}
Geom::Curve const &lastcurve = path_last[index];
Geom::Affine tr = sp_shape_marker_get_transform_at_end(lastcurve);
if (marker->orient_mode == MARKER_ORIENT_ANGLE) {
Geom::Point transl = tr.translation();
tr = Geom::Rotate::from_degrees(marker->orient.computed) * Geom::Translate(transl);
}
if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
tr = Geom::Scale(this->style->stroke_width.computed) * tr;
}
// total marker transform
tr = marker_item->transform * marker->c2p * tr * transform;
// get bbox of the marker with that transform
bbox |= marker_item->visualBounds(tr);
}
}
}
}
}
return bbox;
}
static void
sp_shape_print_invoke_marker_printing(SPObject *obj, Geom::Affine tr, SPStyle const *style, SPPrintContext *ctx)
{
SPMarker *marker = SP_MARKER(obj);
if (marker->markerUnits == SP_MARKER_UNITS_STROKEWIDTH) {
tr = Geom::Scale(style->stroke_width.computed) * tr;
}
SPItem* marker_item = sp_item_first_item_child( marker );
if (marker_item) {
tr = marker_item->transform * marker->c2p * tr;
Geom::Affine old_tr = marker_item->transform;
marker_item->transform = tr;
marker_item->invoke_print (ctx);
marker_item->transform = old_tr;
}
}
void SPShape::print(SPPrintContext* ctx) {
if (!this->_curve) {
return;
}
Geom::PathVector const & pathv = this->_curve->get_pathvector();
if (pathv.empty()) {
return;
}
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
gint add_comments = prefs->getBool("/printing/debug/add-label-comments");
if (add_comments) {
gchar * comment = g_strdup_printf("begin '%s'", this->defaultLabel());
sp_print_comment(ctx, comment);
g_free(comment);
}
/* fixme: Think (Lauris) */
Geom::OptRect pbox, dbox, bbox;
pbox = this->geometricBounds();
bbox = this->desktopVisualBounds();
dbox = Geom::Rect::from_xywh(Geom::Point(0,0), this->document->getDimensions());
Geom::Affine const i2dt(this->i2dt_affine());
SPStyle* style = this->style;
if (!style->fill.isNone()) {
sp_print_fill (ctx, pathv, i2dt, style, pbox, dbox, bbox);
}
if (!style->stroke.isNone()) {
sp_print_stroke (ctx, pathv, i2dt, style, pbox, dbox, bbox);
}
/** \todo make code prettier */
// START marker
for (int i = 0; i < 2; i++) { // SP_MARKER_LOC and SP_MARKER_LOC_START
if ( this->_marker[i] ) {
Geom::Affine tr(sp_shape_marker_get_transform_at_start(pathv.begin()->front()));
sp_shape_print_invoke_marker_printing(this->_marker[i], tr, style, ctx);
}
}
// MID marker
for (int i = 0; i < 3; i += 2) { // SP_MARKER_LOC and SP_MARKER_LOC_MID
if (this->_marker[i]) {
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
// START position
if ( path_it != pathv.begin()
&& ! ((path_it == (pathv.end()-1)) && (path_it->size_default() == 0)) ) // if this is the last path and it is a moveto-only, there is no mid marker there
{
Geom::Affine tr(sp_shape_marker_get_transform_at_start(path_it->front()));
sp_shape_print_invoke_marker_printing(this->_marker[i], tr, style, ctx);
}
// MID position
if ( path_it->size_default() > 1) {
Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
while (curve_it2 != path_it->end_default())
{
/* Put marker between curve_it1 and curve_it2.
* Loop to end_default (so including closing segment), because when a path is closed,
* there should be a midpoint marker between last segment and closing straight line segment */
Geom::Affine tr(sp_shape_marker_get_transform(*curve_it1, *curve_it2));
sp_shape_print_invoke_marker_printing(this->_marker[i], tr, style, ctx);
++curve_it1;
++curve_it2;
}
}
if ( path_it != (pathv.end()-1) && !path_it->empty()) {
Geom::Curve const &lastcurve = path_it->back_default();
Geom::Affine tr = sp_shape_marker_get_transform_at_end(lastcurve);
sp_shape_print_invoke_marker_printing(this->_marker[i], tr, style, ctx);
}
}
}
}
// END marker
if ( this->_marker[SP_MARKER_LOC_END] || this->_marker[SP_MARKER_LOC]) {
/* Get reference to last curve in the path.
* For moveto-only path, this returns the "closing line segment". */
Geom::Path const &path_last = pathv.back();
unsigned int index = path_last.size_default();
if (index > 0) {
index--;
}
Geom::Curve const &lastcurve = path_last[index];
Geom::Affine tr = sp_shape_marker_get_transform_at_end(lastcurve);
for (int i = 0; i < 4; i += 3) { // SP_MARKER_LOC and SP_MARKER_LOC_END
if (this->_marker[i]) {
sp_shape_print_invoke_marker_printing(this->_marker[i], tr, style, ctx);
}
}
}
if (add_comments) {
gchar * comment = g_strdup_printf("end '%s'",
this->defaultLabel());
sp_print_comment(ctx, comment);
g_free(comment);
}
}
Inkscape::DrawingItem* SPShape::show(Inkscape::Drawing &drawing, unsigned int /*key*/, unsigned int /*flags*/) {
// std::cout << "SPShape::show(): " << (getId()?getId():"null") << std::endl;
Inkscape::DrawingShape *s = new Inkscape::DrawingShape(drawing);
bool has_markers = this->hasMarkers();
s->setPath(this->_curve);
/* This stanza checks that an object's marker style agrees with
* the marker objects it has allocated. sp_shape_set_marker ensures
* that the appropriate marker objects are present (or absent) to
* match the style.
*/
for (int i = 0 ; i < SP_MARKER_LOC_QTY ; i++) {
sp_shape_set_marker (this, i, this->style->marker_ptrs[i]->value);
}
if (has_markers) {
/* provide key and dimension the marker views */
if (!s->key()) {
s->setKey(SPItem::display_key_new (SP_MARKER_LOC_QTY));
}
for (int i = 0; i < SP_MARKER_LOC_QTY; i++) {
if (_marker[i]) {
sp_marker_show_dimension(_marker[i],
s->key() + i,
numberOfMarkers(i));
}
}
/* Update marker views */
sp_shape_update_marker_view (this, s);
this->context_style = this->style;
s->setStyle(this->style, this->context_style);
s->setChildrenStyle(this->context_style); // Resolve 'context-xxx' in children.
} else if (this->parent) {
this->context_style = this->parent->context_style;
s->setStyle(this->style, this->context_style);
}
return s;
}
/**
* Sets style, path, and paintbox. Updates marker views, including dimensions.
*/
void SPShape::hide(unsigned int key) {
for (int i = 0; i < SP_MARKER_LOC_QTY; ++i) {
if (_marker[i]) {
for (SPItemView* v = display; v != NULL; v = v->next) {
if (key == v->key) {
sp_marker_hide(_marker[i], v->arenaitem->key() + i);
}
}
}
}
//SPLPEItem::onHide(key);
}
/**
* \param shape Shape.
* \return TRUE if the shape has any markers, or FALSE if not.
*/
int SPShape::hasMarkers() const
{
/* Note, we're ignoring 'marker' settings, which technically should apply for
all three settings. This should be fixed later such that if 'marker' is
specified, then all three should appear. */
// Ignore markers for objects which are inside markers themselves.
for (SPObject *parent = this->parent; parent != NULL; parent = parent->parent) {
if (dynamic_cast<SPMarker *>(parent)) {
return 0;
}
}
return (
this->_curve &&
(this->_marker[SP_MARKER_LOC] ||
this->_marker[SP_MARKER_LOC_START] ||
this->_marker[SP_MARKER_LOC_MID] ||
this->_marker[SP_MARKER_LOC_END])
);
}
/**
* \param shape Shape.
* \param type Marker type (e.g. SP_MARKER_LOC_START)
* \return Number of markers that the shape has of this type.
*/
int SPShape::numberOfMarkers(int type) const {
Geom::PathVector const & pathv = this->_curve->get_pathvector();
if (pathv.size() == 0) {
return 0;
}
switch(type) {
case SP_MARKER_LOC:
{
if ( this->_marker[SP_MARKER_LOC] ) {
guint n = 0;
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
n += path_it->size_default() + 1;
}
return n;
} else {
return 0;
}
}
case SP_MARKER_LOC_START:
// there is only a start marker on the first path of a pathvector
return this->_marker[SP_MARKER_LOC_START] ? 1 : 0;
case SP_MARKER_LOC_MID:
{
if ( this->_marker[SP_MARKER_LOC_MID] ) {
guint n = 0;
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
n += path_it->size_default() + 1;
}
n = (n > 1) ? (n - 2) : 0; // Minus the start and end marker, but never negative.
// A path or polyline may have only one point.
return n;
} else {
return 0;
}
}
case SP_MARKER_LOC_END:
{
// there is only an end marker on the last path of a pathvector
return this->_marker[SP_MARKER_LOC_END] ? 1 : 0;
}
default:
return 0;
}
}
/**
* Checks if the given marker is used in the shape, and if so, it
* releases it by calling sp_marker_hide. Also detaches signals
* and unrefs the marker from the shape.
*/
static void
sp_shape_marker_release (SPObject *marker, SPShape *shape)
{
SPItem *item = dynamic_cast<SPItem *>(shape);
g_return_if_fail(item != NULL);
for (int i = 0; i < SP_MARKER_LOC_QTY; i++) {
if (marker == shape->_marker[i]) {
SPItemView *v;
/* Hide marker */
for (v = item->display; v != NULL; v = v->next) {
sp_marker_hide(shape->_marker[i], v->arenaitem->key() + i);
}
/* Detach marker */
shape->_release_connect[i].disconnect();
shape->_modified_connect[i].disconnect();
shape->_marker[i] = static_cast<SPMarker *>(sp_object_hunref(shape->_marker[i], item));
}
}
}
/**
* No-op. Exists for handling 'modified' messages
*/
static void
sp_shape_marker_modified (SPObject */*marker*/, guint /*flags*/, SPItem */*item*/)
{
/* I think mask does update automagically */
/* g_warning ("Item %s mask %s modified", item->getId(), mask->getId()); */
}
/**
* Adds a new marker to shape object at the location indicated by key. value
* must be a valid URI reference resolvable from the shape object (i.e., present
* in the document <defs>). If the shape object already has a marker
* registered at the given position, it is removed first. Then the
* new marker is hrefed and its signals connected.
*/
void
sp_shape_set_marker (SPObject *object, unsigned int key, const gchar *value)
{
SPShape *shape = dynamic_cast<SPShape *>(object);
g_return_if_fail(shape != NULL);
if (key > SP_MARKER_LOC_END) {
return;
}
SPObject *mrk = sp_css_uri_reference_resolve(object->document, value);
SPMarker *marker = dynamic_cast<SPMarker *>(mrk);
if (marker != shape->_marker[key]) {
if (shape->_marker[key]) {
SPItemView *v;
/* Detach marker */
shape->_release_connect[key].disconnect();
shape->_modified_connect[key].disconnect();
/* Hide marker */
for (v = shape->display; v != NULL; v = v->next) {
sp_marker_hide(shape->_marker[key],
v->arenaitem->key() + key);
}
/* Unref marker */
shape->_marker[key] = static_cast<SPMarker *>(sp_object_hunref(shape->_marker[key], object));
}
if (marker) {
shape->_marker[key] = static_cast<SPMarker *>(sp_object_href(marker, object));
shape->_release_connect[key] = marker->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_shape_marker_release), shape));
shape->_modified_connect[key] = marker->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_shape_marker_modified), shape));
}
}
}
// CPPIFY: make pure virtual
void SPShape::set_shape() {
//throw;
}
/* Shape section */
/**
* Calls any registered handlers for the set_shape action
*/
/**
* Adds a curve to the shape. If owner is specified, a reference
* will be made, otherwise the curve will be copied into the shape.
* Any existing curve in the shape will be unreferenced first.
* This routine also triggers a request to update the display.
*/
void SPShape::setCurve(SPCurve *new_curve, unsigned int owner)
{
if (_curve) {
_curve = _curve->unref();
}
if (new_curve) {
if (owner) {
_curve = new_curve->ref();
} else {
_curve = new_curve->copy();
}
}
this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
}
/**
* Sets _curve_before_lpe to refer to the curve.
*/
void
SPShape::setCurveBeforeLPE (SPCurve *new_curve)
{
if (_curve_before_lpe) {
_curve_before_lpe = _curve_before_lpe->unref();
}
if (new_curve) {
_curve_before_lpe = new_curve->ref();
}
}
/**
* Return duplicate of curve (if any exists) or NULL if there is no curve
*/
SPCurve * SPShape::getCurve() const
{
if (_curve) {
return _curve->copy();
}
return NULL;
}
/**
* Return duplicate of curve *before* LPE (if any exists) or NULL if there is no curve
*/
SPCurve * SPShape::getCurveBeforeLPE() const
{
if (hasPathEffect()) {
if (_curve_before_lpe) {
return this->_curve_before_lpe->copy();
}
} else {
if (_curve) {
return _curve->copy();
}
}
return NULL;
}
/**
* Same as sp_shape_set_curve but without updating the display
*/
void SPShape::setCurveInsync(SPCurve *new_curve, unsigned int owner)
{
if (_curve) {
_curve = _curve->unref();
}
if (new_curve) {
if (owner) {
_curve = new_curve->ref();
} else {
_curve = new_curve->copy();
}
}
}
void SPShape::snappoints(std::vector<Inkscape::SnapCandidatePoint> &p, Inkscape::SnapPreferences const *snapprefs) const {
if (this->_curve == NULL) {
return;
}
Geom::PathVector const &pathv = this->_curve->get_pathvector();
if (pathv.empty()) {
return;
}
Geom::Affine const i2dt (this->i2dt_affine ());
if (snapprefs->isTargetSnappable(Inkscape::SNAPTARGET_OBJECT_MIDPOINT)) {
Geom::OptRect bbox = this->desktopVisualBounds();
if (bbox) {
p.push_back(Inkscape::SnapCandidatePoint(bbox->midpoint(), Inkscape::SNAPSOURCE_OBJECT_MIDPOINT, Inkscape::SNAPTARGET_OBJECT_MIDPOINT));
}
}
for(Geom::PathVector::const_iterator path_it = pathv.begin(); path_it != pathv.end(); ++path_it) {
if (snapprefs->isTargetSnappable(Inkscape::SNAPTARGET_NODE_CUSP)) {
// Add the first point of the path
p.push_back(Inkscape::SnapCandidatePoint(path_it->initialPoint() * i2dt, Inkscape::SNAPSOURCE_NODE_CUSP, Inkscape::SNAPTARGET_NODE_CUSP));
}
Geom::Path::const_iterator curve_it1 = path_it->begin(); // incoming curve
Geom::Path::const_iterator curve_it2 = ++(path_it->begin()); // outgoing curve
while (curve_it1 != path_it->end_default())
{
// For each path: consider midpoints of line segments for snapping
if (snapprefs->isTargetSnappable(Inkscape::SNAPTARGET_LINE_MIDPOINT)) {
if (Geom::LineSegment const* line_segment = dynamic_cast<Geom::LineSegment const*>(&(*curve_it1))) {
p.push_back(Inkscape::SnapCandidatePoint(Geom::middle_point(*line_segment) * i2dt, Inkscape::SNAPSOURCE_LINE_MIDPOINT, Inkscape::SNAPTARGET_LINE_MIDPOINT));
}
}
if (curve_it2 == path_it->end_default()) { // Test will only pass for the last iteration of the while loop
if (snapprefs->isTargetSnappable(Inkscape::SNAPTARGET_NODE_CUSP) && !path_it->closed()) {
// Add the last point of the path, but only for open paths
// (for closed paths the first and last point will coincide)
p.push_back(Inkscape::SnapCandidatePoint((*curve_it1).finalPoint() * i2dt, Inkscape::SNAPSOURCE_NODE_CUSP, Inkscape::SNAPTARGET_NODE_CUSP));
}
} else {
/* Test whether to add the node between curve_it1 and curve_it2.
* Loop to end_default (so only iterating through the stroked part); */
Geom::NodeType nodetype = Geom::get_nodetype(*curve_it1, *curve_it2);
bool c1 = snapprefs->isTargetSnappable(Inkscape::SNAPTARGET_NODE_CUSP) && (nodetype == Geom::NODE_CUSP || nodetype == Geom::NODE_NONE);
bool c2 = snapprefs->isTargetSnappable(Inkscape::SNAPTARGET_NODE_SMOOTH) && (nodetype == Geom::NODE_SMOOTH || nodetype == Geom::NODE_SYMM);
if (c1 || c2) {
Inkscape::SnapSourceType sst;
Inkscape::SnapTargetType stt;
switch (nodetype) {
case Geom::NODE_CUSP:
sst = Inkscape::SNAPSOURCE_NODE_CUSP;
stt = Inkscape::SNAPTARGET_NODE_CUSP;
break;
case Geom::NODE_SMOOTH:
case Geom::NODE_SYMM:
sst = Inkscape::SNAPSOURCE_NODE_SMOOTH;
stt = Inkscape::SNAPTARGET_NODE_SMOOTH;
break;
default:
sst = Inkscape::SNAPSOURCE_UNDEFINED;
stt = Inkscape::SNAPTARGET_UNDEFINED;
break;
}
p.push_back(Inkscape::SnapCandidatePoint(curve_it1->finalPoint() * i2dt, sst, stt));
}
}
++curve_it1;
++curve_it2;
}
// Find the internal intersections of each path and consider these for snapping
// (using "Method 1" as described in Inkscape::ObjectSnapper::_collectNodes())
if (snapprefs->isTargetSnappable(Inkscape::SNAPTARGET_PATH_INTERSECTION) || snapprefs->isSourceSnappable(Inkscape::SNAPSOURCE_PATH_INTERSECTION)) {
Geom::Crossings cs;
try {
cs = self_crossings(*path_it); // This can be slow!
if (!cs.empty()) { // There might be multiple intersections...
for (Geom::Crossings::const_iterator i = cs.begin(); i != cs.end(); ++i) {
Geom::Point p_ix = (*path_it).pointAt((*i).ta);
p.push_back(Inkscape::SnapCandidatePoint(p_ix * i2dt, Inkscape::SNAPSOURCE_PATH_INTERSECTION, Inkscape::SNAPTARGET_PATH_INTERSECTION));
}
}
} catch (Geom::RangeError &e) {
// do nothing
// The exception could be Geom::InfiniteSolutions: then no snappoints should be added
}
}
}
}
/*
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 :