![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/src/object-snapper.cpp b/src/object-snapper.cpp
index 71c790c17f44b9281a538e885f5576a02168856f..7d79a5e91a7aa0686dd66cf8694604aad3acb154 100644 (file)
--- a/src/object-snapper.cpp
+++ b/src/object-snapper.cpp
* Carl Hetherington <inkscape@carlh.net>
* Diederik van Lierop <mail@diedenrezi.nl>
*
- * Copyright (C) 2005 - 2007 Authors
+ * Copyright (C) 2005 - 2008 Authors
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
-#include "libnr/n-art-bpath.h"
-#include "libnr/nr-path.h"
-#include "libnr/nr-rect-ops.h"
-#include "libnr/nr-point-fns.h"
-#include "live_effects/n-art-bpath-2geom.h"
-#include "2geom/path-intersection.h"
+#include "svg/svg.h"
+#include <2geom/path-intersection.h>
+#include <2geom/point.h>
+#include <2geom/rect.h>
+#include <2geom/line.h>
#include "document.h"
#include "sp-namedview.h"
#include "sp-image.h"
#include "sp-item.h"
#include "sp-use.h"
#include "display/curve.h"
-#include "desktop.h"
#include "inkscape.h"
-#include "prefs-utils.h"
+#include "preferences.h"
#include "sp-text.h"
#include "sp-flowtext.h"
#include "text-editing.h"
+#include "sp-clippath.h"
+#include "sp-mask.h"
+#include "helper/geom-curves.h"
+#include "desktop.h"
-Inkscape::ObjectSnapper::ObjectSnapper(SPNamedView const *nv, NR::Coord const d)
- : Snapper(nv, d), _snap_to_itemnode(true), _snap_to_itempath(true),
- _snap_to_bboxnode(true), _snap_to_bboxpath(true), _strict_snapping(true),
- _include_item_center(false)
+Inkscape::ObjectSnapper::ObjectSnapper(SnapManager *sm, Geom::Coord const d)
+ : Snapper(sm, d)
{
- _candidates = new std::vector<SPItem*>;
- _points_to_snap_to = new std::vector<NR::Point>;
- _bpaths_to_snap_to = new std::vector<NArtBpath*>;
- _paths_to_snap_to = new std::vector<Path*>;
+ _candidates = new std::vector<SnapCandidateItem>;
+ _points_to_snap_to = new std::vector<Inkscape::SnapCandidatePoint>;
+ _paths_to_snap_to = new std::vector<Inkscape::SnapCandidatePath >;
}
Inkscape::ObjectSnapper::~ObjectSnapper()
{
- _candidates->clear(); //Don't delete the candidates themselves, as these are not ours!
+ _candidates->clear();
delete _candidates;
_points_to_snap_to->clear();
_clear_paths();
delete _paths_to_snap_to;
- delete _bpaths_to_snap_to;
+}
+
+/**
+ * \return Snap tolerance (desktop coordinates); depends on current zoom so that it's always the same in screen pixels
+ */
+Geom::Coord Inkscape::ObjectSnapper::getSnapperTolerance() const
+{
+ SPDesktop const *dt = _snapmanager->getDesktop();
+ double const zoom = dt ? dt->current_zoom() : 1;
+ return _snapmanager->snapprefs.getObjectTolerance() / zoom;
+}
+
+bool Inkscape::ObjectSnapper::getSnapperAlwaysSnap() const
+{
+ return _snapmanager->snapprefs.getObjectTolerance() == 10000; //TODO: Replace this threshold of 10000 by a constant; see also tolerance-slider.cpp
}
/**
* Find all items within snapping range.
- * \param r Pointer to the current document
+ * \param parent Pointer to the document's root, or to a clipped path or mask object
* \param it List of items to ignore
- * \param first_point If true then this point is the first one from a whole bunch of points
- * \param points_to_snap The whole bunch of points, all from the same selection and having the same transformation
+ * \param bbox_to_snap Bounding box hulling the whole bunch of points, all from the same selection and having the same transformation
* \param DimensionToSnap Snap in X, Y, or both directions.
*/
-void Inkscape::ObjectSnapper::_findCandidates(SPObject* r,
- std::list<SPItem const *> const &it,
+void Inkscape::ObjectSnapper::_findCandidates(SPObject* parent,
+ std::vector<SPItem const *> const *it,
bool const &first_point,
- std::vector<NR::Point> &points_to_snap,
- DimensionToSnap const snap_dim) const
+ Geom::Rect const &bbox_to_snap,
+ DimensionToSnap const snap_dim,
+ bool const clip_or_mask,
+ Geom::Matrix const additional_affine) const // transformation of the item being clipped / masked
{
- if (ThisSnapperMightSnap()) {
- SPDesktop const *desktop = SP_ACTIVE_DESKTOP;
+ bool const c1 = (snap_dim == TRANSL_SNAP_XY) && ThisSnapperMightSnap();
+ bool const c2 = (snap_dim != TRANSL_SNAP_XY) && GuidesMightSnap();
- if (first_point) {
- _candidates->clear();
- }
+ if (!(c1 || c2)) {
+ return;
+ }
- for (SPObject* o = sp_object_first_child(r); o != NULL; o = SP_OBJECT_NEXT(o)) {
- if (SP_IS_ITEM(o) && !SP_ITEM(o)->isLocked() && !desktop->itemIsHidden(SP_ITEM(o))) {
+ if (first_point) {
+ _candidates->clear();
+ }
- /* See if this item is on the ignore list */
- std::list<SPItem const *>::const_iterator i = it.begin();
- while (i != it.end() && *i != o) {
+ Geom::Rect bbox_to_snap_incl = bbox_to_snap; // _incl means: will include the snapper tolerance
+ bbox_to_snap_incl.expandBy(getSnapperTolerance()); // see?
+
+ for (SPObject* o = sp_object_first_child(parent); o != NULL; o = SP_OBJECT_NEXT(o)) {
+ g_assert(_snapmanager->getDesktop() != NULL);
+ if (SP_IS_ITEM(o) && !(_snapmanager->getDesktop()->itemIsHidden(SP_ITEM(o)) && !clip_or_mask)) {
+ // Snapping to items in a locked layer is allowed
+ // Don't snap to hidden objects, unless they're a clipped path or a mask
+ /* See if this item is on the ignore list */
+ std::vector<SPItem const *>::const_iterator i;
+ if (it != NULL) {
+ i = it->begin();
+ while (i != it->end() && *i != o) {
i++;
}
+ }
- if (i == it.end()) {
- /* See if the item is within range */
- if (SP_IS_GROUP(o)) {
- _findCandidates(o, it, false, points_to_snap, snap_dim);
+ if (it == NULL || i == it->end()) {
+ SPItem *item = SP_ITEM(o);
+ if (item) {
+ SPObject *obj = NULL;
+ if (!clip_or_mask) { // cannot clip or mask more than once
+ // The current item is not a clipping path or a mask, but might
+ // still be the subject of clipping or masking itself ; if so, then
+ // we should also consider that path or mask for snapping to
+ obj = SP_OBJECT(item->clip_ref->getObject());
+ if (obj) {
+ _findCandidates(obj, it, false, bbox_to_snap, snap_dim, true, sp_item_i2doc_affine(item));
+ }
+ obj = SP_OBJECT(item->mask_ref->getObject());
+ if (obj) {
+ _findCandidates(obj, it, false, bbox_to_snap, snap_dim, true, sp_item_i2doc_affine(item));
+ }
+ }
+ }
+
+ if (SP_IS_GROUP(o)) {
+ _findCandidates(o, it, false, bbox_to_snap, snap_dim, clip_or_mask, additional_affine);
+ } else {
+ Geom::OptRect bbox_of_item = Geom::Rect();
+ if (clip_or_mask) {
+ // Oh oh, this will get ugly. We cannot use sp_item_i2d_affine directly because we need to
+ // insert an additional transformation in document coordinates (code copied from sp_item_i2d_affine)
+ sp_item_invoke_bbox(item,
+ bbox_of_item,
+ sp_item_i2doc_affine(item) * additional_affine * _snapmanager->getDesktop()->doc2dt(),
+ true);
} else {
- // Now let's see if any of the snapping points is within
- // snapping range of this object
- NR::Maybe<NR::Rect> b = sp_item_bbox_desktop(SP_ITEM(o));
- if (b) {
- for (std::vector<NR::Point>::const_iterator i = points_to_snap.begin(); i != points_to_snap.end(); i++) {
- NR::Point b_min = b->min();
- NR::Point b_max = b->max();
- double d = getDistance();
- bool withinX = ((*i)[NR::X] >= b_min[NR::X] - d) && ((*i)[NR::X] <= b_max[NR::X] + d);
- bool withinY = ((*i)[NR::Y] >= b_min[NR::Y] - d) && ((*i)[NR::Y] <= b_max[NR::Y] + d);
- if (snap_dim == SNAP_X && withinX || snap_dim == SNAP_Y && withinY || snap_dim == SNAP_XY && withinX && withinY) {
- //We've found a point that is within snapping range
- //of this object, so record it as a candidate
- _candidates->push_back(SP_ITEM(o));
- break;
- }
- }
+ sp_item_invoke_bbox(item, bbox_of_item, sp_item_i2d_affine(item), true);
+ }
+ if (bbox_of_item) {
+ // See if the item is within range
+ if (bbox_to_snap_incl.intersects(*bbox_of_item)) {
+ // This item is within snapping range, so record it as a candidate
+ _candidates->push_back(SnapCandidateItem(item, clip_or_mask, additional_affine));
+ // For debugging: print the id of the candidate to the console
+ //SPObject *obj = (SPObject*)item;
+ //std::cout << "Snap candidate added: " << obj->id << std::endl;
}
}
}
}
-void Inkscape::ObjectSnapper::_collectNodes(Inkscape::Snapper::PointType const &t,
- bool const &first_point) const
+void Inkscape::ObjectSnapper::_collectNodes(Inkscape::SnapSourceType const &t,
+ bool const &first_point) const
{
// Now, let's first collect all points to snap to. If we have a whole bunch of points to snap,
// e.g. when translating an item using the selector tool, then we will only do this for the
// first point and store the collection for later use. This significantly improves the performance
if (first_point) {
_points_to_snap_to->clear();
-
+
// Determine the type of bounding box we should snap to
SPItem::BBoxType bbox_type = SPItem::GEOMETRIC_BBOX;
-
- bool p_is_a_node = t & Inkscape::Snapper::SNAPPOINT_NODE;
- bool p_is_a_bbox = t & Inkscape::Snapper::SNAPPOINT_BBOX;
- bool p_is_a_guide = t & Inkscape::Snapper::SNAPPOINT_GUIDE;
-
+
+ bool p_is_a_node = t & Inkscape::SNAPSOURCE_NODE_CATEGORY;
+ bool p_is_a_bbox = t & Inkscape::SNAPSOURCE_BBOX_CATEGORY;
+ bool p_is_other = t & Inkscape::SNAPSOURCE_OTHER_CATEGORY;
+
// A point considered for snapping should be either a node, a bbox corner or a guide. Pick only ONE!
- g_assert(!(p_is_a_node && p_is_a_bbox || p_is_a_bbox && p_is_a_guide || p_is_a_node && p_is_a_guide));
-
- if (_snap_to_bboxnode) {
- gchar const *prefs_bbox = prefs_get_string_attribute("tools.select", "bounding_box");
- bbox_type = (prefs_bbox != NULL && strcmp(prefs_bbox, "geometric")==0)? SPItem::GEOMETRIC_BBOX : SPItem::APPROXIMATE_BBOX;
+ g_assert(!((p_is_a_node && p_is_a_bbox) || (p_is_a_bbox && p_is_other) || (p_is_a_node && p_is_other)));
+
+ if (_snapmanager->snapprefs.getSnapToBBoxNode() || _snapmanager->snapprefs.getSnapBBoxEdgeMidpoints() || _snapmanager->snapprefs.getSnapBBoxMidpoints()) {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ bool prefs_bbox = prefs->getBool("/tools/bounding_box");
+ bbox_type = !prefs_bbox ?
+ SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
+ }
+
+ // Consider the page border for snapping to
+ if (_snapmanager->snapprefs.getSnapToPageBorder()) {
+ _getBorderNodes(_points_to_snap_to);
}
- for (std::vector<SPItem*>::const_iterator i = _candidates->begin(); i != _candidates->end(); i++) {
- //NR::Matrix i2doc(NR::identity());
- SPItem *root_item = *i;
- if (SP_IS_USE(*i)) {
- root_item = sp_use_root(SP_USE(*i));
+ for (std::vector<SnapCandidateItem>::const_iterator i = _candidates->begin(); i != _candidates->end(); i++) {
+ //Geom::Matrix i2doc(Geom::identity());
+ SPItem *root_item = (*i).item;
+ if (SP_IS_USE((*i).item)) {
+ root_item = sp_use_root(SP_USE((*i).item));
}
+ g_return_if_fail(root_item);
//Collect all nodes so we can snap to them
- if (_snap_to_itemnode) {
- if (!(_strict_snapping && !p_is_a_node) || p_is_a_guide) {
- sp_item_snappoints(root_item, _include_item_center, SnapPointsIter(*_points_to_snap_to));
+ if (p_is_a_node || !(_snapmanager->snapprefs.getStrictSnapping() && !p_is_a_node) || p_is_other) {
+ // Note: there are two ways in which intersections are considered:
+ // Method 1: Intersections are calculated for each shape individually, for both the
+ // snap source and snap target (see sp_shape_snappoints)
+ // Method 2: Intersections are calculated for each curve or line that we've snapped to, i.e. only for
+ // the target (see the intersect() method in the SnappedCurve and SnappedLine classes)
+ // Some differences:
+ // - Method 1 doesn't find intersections within a set of multiple objects
+ // - Method 2 only works for targets
+ // When considering intersections as snap targets:
+ // - Method 1 only works when snapping to nodes, whereas
+ // - Method 2 only works when snapping to paths
+ // - There will be performance differences too!
+ // If both methods are being used simultaneously, then this might lead to duplicate targets!
+
+ // Well, here we will be looking for snap TARGETS. Both methods can therefore be used.
+ // When snapping to paths, we will get a collection of snapped lines and snapped curves. findBestSnap() will
+ // go hunting for intersections (but only when asked to in the prefs of course). In that case we can just
+ // temporarily block the intersections in sp_item_snappoints, we don't need duplicates. If we're not snapping to
+ // paths though but only to item nodes then we should still look for the intersections in sp_item_snappoints()
+ bool old_pref = _snapmanager->snapprefs.getSnapIntersectionCS();
+ if (_snapmanager->snapprefs.getSnapToItemPath()) {
+ _snapmanager->snapprefs.setSnapIntersectionCS(false);
+ }
+
+ sp_item_snappoints(root_item, *_points_to_snap_to, &_snapmanager->snapprefs);
+
+ if (_snapmanager->snapprefs.getSnapToItemPath()) {
+ _snapmanager->snapprefs.setSnapIntersectionCS(old_pref);
}
}
//Collect the bounding box's corners so we can snap to them
- if (_snap_to_bboxnode) {
- if (!(_strict_snapping && !p_is_a_bbox) || p_is_a_guide) {
- NR::Maybe<NR::Rect> b = sp_item_bbox_desktop(root_item, bbox_type);
- if (b) {
- for ( unsigned k = 0 ; k < 4 ; k++ ) {
- _points_to_snap_to->push_back(b->corner(k));
- }
- }
+ if (p_is_a_bbox || !(_snapmanager->snapprefs.getStrictSnapping() && !p_is_a_bbox) || p_is_other) {
+ // Discard the bbox of a clipped path / mask, because we don't want to snap to both the bbox
+ // of the item AND the bbox of the clipping path at the same time
+ if (!(*i).clip_or_mask) {
+ Geom::OptRect b = sp_item_bbox_desktop(root_item, bbox_type);
+ getBBoxPoints(b, _points_to_snap_to, true, _snapmanager->snapprefs.getSnapToBBoxNode(), _snapmanager->snapprefs.getSnapBBoxEdgeMidpoints(), _snapmanager->snapprefs.getSnapBBoxMidpoints());
}
}
}
@@ -171,49 +248,69 @@ void Inkscape::ObjectSnapper::_collectNodes(Inkscape::Snapper::PointType const &
}
void Inkscape::ObjectSnapper::_snapNodes(SnappedConstraints &sc,
- Inkscape::Snapper::PointType const &t,
- NR::Point const &p,
- bool const &first_point,
- DimensionToSnap const snap_dim) const
+ Inkscape::SnapCandidatePoint const &p,
+ std::vector<SnapCandidatePoint> *unselected_nodes) const
{
- _collectNodes(t, first_point);
-
- //Do the snapping, using all the nodes and corners collected before
- NR::Point snapped_point;
+ // Iterate through all nodes, find out which one is the closest to p, and snap to it!
+
+ _collectNodes(p.getSourceType(), p.getSourceNum() == 0);
+
+ if (unselected_nodes != NULL) {
+ _points_to_snap_to->insert(_points_to_snap_to->end(), unselected_nodes->begin(), unselected_nodes->end());
+ }
+
SnappedPoint s;
bool success = false;
-
- for (std::vector<NR::Point>::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) {
- /* Try to snap to this node of the path */
- NR::Coord dist = NR_HUGE;
- switch (snap_dim) {
- case SNAP_X:
- dist = fabs((*k)[NR::X] - p[NR::X]);
- snapped_point = NR::Point((*k)[NR::X], p[NR::Y]);
- break;
- case SNAP_Y:
- dist = fabs((*k)[NR::Y] - p[NR::Y]);
- snapped_point = NR::Point(p[NR::X], (*k)[NR::Y]);
- break;
- case SNAP_XY:
- dist = NR::L2(*k - p);
- snapped_point = *k;
- break;
- }
- if (dist < getDistance() && dist < s.getDistance()) {
- s = SnappedPoint(snapped_point, dist);
+ for (std::vector<SnapCandidatePoint>::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) {
+ Geom::Coord dist = Geom::L2((*k).getPoint() - p.getPoint());
+ if (dist < getSnapperTolerance() && dist < s.getSnapDistance()) {
+ s = SnappedPoint((*k).getPoint(), p.getSourceType(), p.getSourceNum(), (*k).getTargetType(), dist, getSnapperTolerance(), getSnapperAlwaysSnap(), true, (*k).getTargetBBox());
success = true;
}
}
if (success) {
- sc.points.push_back(s);
+ sc.points.push_back(s);
+ }
+}
+
+void Inkscape::ObjectSnapper::_snapTranslatingGuideToNodes(SnappedConstraints &sc,
+ Geom::Point const &p,
+ Geom::Point const &guide_normal) const
+{
+ // Iterate through all nodes, find out which one is the closest to this guide, and snap to it!
+ _collectNodes(SNAPSOURCE_GUIDE, true);
+
+ // Although we won't snap to paths here (which would give us under constrained snaps) we can still snap to intersections of paths.
+ if (_snapmanager->snapprefs.getSnapToItemPath() || _snapmanager->snapprefs.getSnapToBBoxPath() || _snapmanager->snapprefs.getSnapToPageBorder()) {
+ _collectPaths(Inkscape::SnapCandidatePoint(p, SNAPSOURCE_GUIDE), true);
+ _snapPaths(sc, Inkscape::SnapCandidatePoint(p, SNAPSOURCE_GUIDE), NULL, NULL);
+ // The paths themselves should be discarded in findBestSnap(), as we should only snap to their intersections
+ }
+
+ SnappedPoint s;
+
+ Geom::Coord tol = getSnapperTolerance();
+
+ for (std::vector<SnapCandidatePoint>::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) {
+ // Project each node (*k) on the guide line (running through point p)
+ Geom::Point p_proj = Geom::projection((*k).getPoint(), Geom::Line(p, p + Geom::rot90(guide_normal)));
+ Geom::Coord dist = Geom::L2((*k).getPoint() - p_proj); // distance from node to the guide
+ Geom::Coord dist2 = Geom::L2(p - p_proj); // distance from projection of node on the guide, to the mouse location
+ if ((dist < tol && dist2 < tol) || getSnapperAlwaysSnap()) {
+ s = SnappedPoint((*k).getPoint(), SNAPSOURCE_GUIDE, 0, (*k).getTargetType(), dist, tol, getSnapperAlwaysSnap(), true, (*k).getTargetBBox());
+ sc.points.push_back(s);
+ }
}
}
-void Inkscape::ObjectSnapper::_collectPaths(Inkscape::Snapper::PointType const &t,
+/**
+ * Returns index of first NR_END bpath in array.
+ */
+
+void Inkscape::ObjectSnapper::_collectPaths(Inkscape::SnapCandidatePoint const &p,
bool const &first_point) const
{
// Now, let's first collect all paths to snap to. If we have a whole bunch of points to snap,
@@ -221,36 +318,48 @@ void Inkscape::ObjectSnapper::_collectPaths(Inkscape::Snapper::PointType const &
// first point and store the collection for later use. This significantly improves the performance
if (first_point) {
_clear_paths();
-
+
// Determine the type of bounding box we should snap to
SPItem::BBoxType bbox_type = SPItem::GEOMETRIC_BBOX;
-
- bool p_is_a_node = t & Inkscape::Snapper::SNAPPOINT_NODE;
-
- if (_snap_to_bboxpath) {
- gchar const *prefs_bbox = prefs_get_string_attribute("tools.select", "bounding_box");
- bbox_type = (prefs_bbox != NULL && strcmp(prefs_bbox, "geometric")==0)? SPItem::GEOMETRIC_BBOX : SPItem::APPROXIMATE_BBOX;
+
+ bool p_is_a_node = p.getSourceType() & Inkscape::SNAPSOURCE_NODE_CATEGORY;
+ bool p_is_other = p.getSourceType() & Inkscape::SNAPSOURCE_OTHER_CATEGORY;
+
+ if (_snapmanager->snapprefs.getSnapToBBoxPath()) {
+ Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+ int prefs_bbox = prefs->getBool("/tools/bounding_box", 0);
+ bbox_type = !prefs_bbox ?
+ SPItem::APPROXIMATE_BBOX : SPItem::GEOMETRIC_BBOX;
+ }
+
+ // Consider the page border for snapping
+ if (_snapmanager->snapprefs.getSnapToPageBorder()) {
+ Geom::PathVector *border_path = _getBorderPathv();
+ if (border_path != NULL) {
+ _paths_to_snap_to->push_back(Inkscape::SnapCandidatePath(border_path, SNAPTARGET_PAGE_BORDER, Geom::OptRect()));
+ }
}
-
- for (std::vector<SPItem*>::const_iterator i = _candidates->begin(); i != _candidates->end(); i++) {
+
+ for (std::vector<SnapCandidateItem>::const_iterator i = _candidates->begin(); i != _candidates->end(); i++) {
/* Transform the requested snap point to this item's coordinates */
- NR::Matrix i2doc(NR::identity());
+ Geom::Matrix i2doc(Geom::identity());
SPItem *root_item = NULL;
/* We might have a clone at hand, so make sure we get the root item */
- if (SP_IS_USE(*i)) {
- i2doc = sp_use_get_root_transform(SP_USE(*i));
- root_item = sp_use_root(SP_USE(*i));
+ if (SP_IS_USE((*i).item)) {
+ i2doc = sp_use_get_root_transform(SP_USE((*i).item));
+ root_item = sp_use_root(SP_USE((*i).item));
+ g_return_if_fail(root_item);
} else {
- i2doc = sp_item_i2doc_affine(*i);
- root_item = *i;
+ i2doc = sp_item_i2doc_affine((*i).item);
+ root_item = (*i).item;
}
//Build a list of all paths considered for snapping to
//Add the item's path to snap to
- if (_snap_to_itempath) {
- if (!(_strict_snapping && !p_is_a_node)) {
+ if (_snapmanager->snapprefs.getSnapToItemPath()) {
+ if (p_is_other || !(_snapmanager->snapprefs.getStrictSnapping() && !p_is_a_node)) {
// Snapping to the path of characters is very cool, but for a large
// chunk of text this will take ages! So limit snapping to text paths
// containing max. 240 characters. Snapping the bbox will not be affected
@@ -271,234 +380,311 @@ void Inkscape::ObjectSnapper::_collectPaths(Inkscape::Snapper::PointType const &
}
if (!very_lenghty_prose && !very_complex_path) {
- SPCurve *curve = curve_for_item(root_item);
+ SPCurve *curve = curve_for_item(root_item);
if (curve) {
- NArtBpath *bpath = bpath_for_curve(root_item, curve, true, true);
- _bpaths_to_snap_to->push_back(bpath);
- // Because in bpath_for_curve we set doTransformation to true, we
- // will get a dupe of the path, which must be freed at some point
- sp_curve_unref(curve);
+ // We will get our own copy of the path, which must be freed at some point
+ Geom::PathVector *borderpathv = pathvector_for_curve(root_item, curve, true, true, Geom::identity(), (*i).additional_affine);
+ _paths_to_snap_to->push_back(Inkscape::SnapCandidatePath(borderpathv, SNAPTARGET_PATH, Geom::OptRect())); // Perhaps for speed, get a reference to the Geom::pathvector, and store the transformation besides it.
+ curve->unref();
}
}
}
}
//Add the item's bounding box to snap to
- if (_snap_to_bboxpath) {
- if (!(_strict_snapping && p_is_a_node)) {
- NRRect rect;
- sp_item_invoke_bbox(root_item, &rect, i2doc, TRUE, bbox_type);
- NArtBpath *bpath = nr_path_from_rect(rect);
- _bpaths_to_snap_to->push_back(bpath);
+ if (_snapmanager->snapprefs.getSnapToBBoxPath()) {
+ if (p_is_other || !(_snapmanager->snapprefs.getStrictSnapping() && p_is_a_node)) {
+ // Discard the bbox of a clipped path / mask, because we don't want to snap to both the bbox
+ // of the item AND the bbox of the clipping path at the same time
+ if (!(*i).clip_or_mask) {
+ Geom::OptRect rect;
+ sp_item_invoke_bbox(root_item, rect, i2doc, TRUE, bbox_type);
+ if (rect) {
+ Geom::PathVector *path = _getPathvFromRect(*rect);
+ rect = sp_item_bbox_desktop(root_item, bbox_type);
+ _paths_to_snap_to->push_back(Inkscape::SnapCandidatePath(path, SNAPTARGET_BBOX_EDGE, rect));
+ }
+ }
}
}
}
}
}
-
+
void Inkscape::ObjectSnapper::_snapPaths(SnappedConstraints &sc,
- Inkscape::Snapper::PointType const &t,
- NR::Point const &p,
- bool const &first_point) const
+ Inkscape::SnapCandidatePoint const &p,
+ std::vector<Inkscape::SnapCandidatePoint> *unselected_nodes,
+ SPPath const *selected_path) const
{
- _collectPaths(t, first_point);
-
+ _collectPaths(p, p.getSourceNum() == 0);
// Now we can finally do the real snapping, using the paths collected above
- SnappedPoint s;
- bool success = false;
-
- /* FIXME: this seems like a hack. Perhaps Snappers should be
- ** in SPDesktop rather than SPNamedView?
- */
- SPDesktop const *desktop = SP_ACTIVE_DESKTOP;
- NR::Point const p_doc = desktop->dt2doc(p);
-
- // Convert all bpaths to Paths, because here we really must have Paths
- // (whereas in _snapPathsConstrained we will use the original bpaths)
- if (first_point) {
- for (std::vector<NArtBpath*>::const_iterator k = _bpaths_to_snap_to->begin(); k != _bpaths_to_snap_to->end(); k++) {
- Path *path = bpath_to_Path(*k);
- if (path) {
- path->ConvertWithBackData(0.01); //This is extremely time consuming!
- _paths_to_snap_to->push_back(path);
- }
+
+ g_assert(_snapmanager->getDesktop() != NULL);
+ Geom::Point const p_doc = _snapmanager->getDesktop()->dt2doc(p.getPoint());
+
+ bool const node_tool_active = _snapmanager->snapprefs.getSnapToItemPath() && selected_path != NULL;
+
+ if (p.getSourceNum() == 0) {
+ /* findCandidates() is used for snapping to both paths and nodes. It ignores the path that is
+ * currently being edited, because that path requires special care: when snapping to nodes
+ * only the unselected nodes of that path should be considered, and these will be passed on separately.
+ * This path must not be ignored however when snapping to the paths, so we add it here
+ * manually when applicable.
+ * */
+ if (node_tool_active) {
+ SPCurve *curve = curve_for_item(SP_ITEM(selected_path));
+ if (curve) {
+ Geom::PathVector *pathv = pathvector_for_curve(SP_ITEM(selected_path), curve, true, true, Geom::identity(), Geom::identity()); // We will get our own copy of the path, which must be freed at some point
+ _paths_to_snap_to->push_back(Inkscape::SnapCandidatePath(pathv, SNAPTARGET_PATH, Geom::OptRect(), true));
+ curve->unref();
+ }
}
}
-
- for (std::vector<Path*>::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) {
- if (*k) {
- /* Look for the nearest position on this SPItem to our snap point */
- NR::Maybe<Path::cut_position> const o = get_nearest_position_on_Path(*k, p_doc);
- if (o && o->t >= 0 && o->t <= 1) {
-
- /* Convert the nearest point back to desktop coordinates */
- NR::Point const o_it = get_point_on_Path(*k, o->piece, o->t);
- NR::Point const o_dt = desktop->doc2dt(o_it);
- NR::Coord const dist = NR::L2(o_dt - p);
-
- if (dist < getDistance()) {
- // if we snap to a straight line segment (within a path), then return this line segment
- if ((*k)->IsLineSegment(o->piece)) {
- NR::Point start_point;
- NR::Point end_point;
- (*k)->PointAt(o->piece, 0, start_point);
- (*k)->PointAt(o->piece, 1, end_point);
- start_point = desktop->doc2dt(start_point);
- end_point = desktop->doc2dt(end_point);
- sc.lines.push_back(Inkscape::SnappedLineSegment(o_dt, dist, start_point, end_point));
- } else {
- // for segments other than straight lines of a path, we'll return just the closest snapped point
- if (dist < s.getDistance()) {
- s = SnappedPoint(o_dt, dist);
- success = true;
- }
- }
+
+ for (std::vector<Inkscape::SnapCandidatePath >::const_iterator it_p = _paths_to_snap_to->begin(); it_p != _paths_to_snap_to->end(); it_p++) {
+ bool const being_edited = node_tool_active && (*it_p).currently_being_edited;
+ //if true then this pathvector it_pv is currently being edited in the node tool
+
+ for(Geom::PathVector::iterator it_pv = (it_p->path_vector)->begin(); it_pv != (it_p->path_vector)->end(); ++it_pv) {
+ // Find a nearest point for each curve within this path
+ // n curves will return n time values with 0 <= t <= 1
+ std::vector<double> anp = (*it_pv).nearestPointPerCurve(p_doc);
+
+ std::vector<double>::const_iterator np = anp.begin();
+ unsigned int index = 0;
+ for (; np != anp.end(); np++, index++) {
+ Geom::Curve const *curve = &((*it_pv).at_index(index));
+ Geom::Point const sp_doc = curve->pointAt(*np);
+
+ bool c1 = true;
+ bool c2 = true;
+ if (being_edited) {
+ /* If the path is being edited, then we should only snap though to stationary pieces of the path
+ * and not to the pieces that are being dragged around. This way we avoid
+ * self-snapping. For this we check whether the nodes at both ends of the current
+ * piece are unselected; if they are then this piece must be stationary
+ */
+ g_assert(unselected_nodes != NULL);
+ Geom::Point start_pt = _snapmanager->getDesktop()->doc2dt(curve->pointAt(0));
+ Geom::Point end_pt = _snapmanager->getDesktop()->doc2dt(curve->pointAt(1));
+ c1 = isUnselectedNode(start_pt, unselected_nodes);
+ c2 = isUnselectedNode(end_pt, unselected_nodes);
+ /* Unfortunately, this might yield false positives for coincident nodes. Inkscape might therefore mistakenly
+ * snap to path segments that are not stationary. There are at least two possible ways to overcome this:
+ * - Linking the individual nodes of the SPPath we have here, to the nodes of the NodePath::SubPath class as being
+ * used in sp_nodepath_selected_nodes_move. This class has a member variable called "selected". For this the nodes
+ * should be in the exact same order for both classes, so we can index them
+ * - Replacing the SPPath being used here by the the NodePath::SubPath class; but how?
+ */
+ }
+
+ Geom::Point const sp_dt = _snapmanager->getDesktop()->doc2dt(sp_doc);
+ if (!being_edited || (c1 && c2)) {
+ Geom::Coord const dist = Geom::distance(sp_doc, p_doc);
+ if (dist < getSnapperTolerance()) {
+ sc.curves.push_back(Inkscape::SnappedCurve(sp_dt, dist, getSnapperTolerance(), getSnapperAlwaysSnap(), false, curve, p.getSourceType(), p.getSourceNum(), it_p->target_type, it_p->target_bbox));
+ }
}
}
- }
+ } // End of: for (Geom::PathVector::iterator ....)
+ }
+}
+
+/* Returns true if point is coincident with one of the unselected nodes */
+bool Inkscape::ObjectSnapper::isUnselectedNode(Geom::Point const &point, std::vector<Inkscape::SnapCandidatePoint> const *unselected_nodes) const
+{
+ if (unselected_nodes == NULL) {
+ return false;
}
- if (success) {
- sc.points.push_back(s);
+ if (unselected_nodes->size() == 0) {
+ return false;
}
+
+ for (std::vector<Inkscape::SnapCandidatePoint>::const_iterator i = unselected_nodes->begin(); i != unselected_nodes->end(); i++) {
+ if (Geom::L2(point - (*i).getPoint()) < 1e-4) {
+ return true;
+ }
+ }
+
+ return false;
}
void Inkscape::ObjectSnapper::_snapPathsConstrained(SnappedConstraints &sc,
- Inkscape::Snapper::PointType const &t,
- NR::Point const &p,
- bool const &first_point,
+ Inkscape::SnapCandidatePoint const &p,
ConstraintLine const &c) const
{
- _collectPaths(t, first_point);
-
+
+ _collectPaths(p, p.getSourceNum() == 0);
+
// Now we can finally do the real snapping, using the paths collected above
-
- /* FIXME: this seems like a hack. Perhaps Snappers should be
- ** in SPDesktop rather than SPNamedView?
- */
- SPDesktop const *desktop = SP_ACTIVE_DESKTOP;
- NR::Point const p_doc = desktop->dt2doc(p);
-
- NR::Point direction_vector = c.getDirection();
+
+ g_assert(_snapmanager->getDesktop() != NULL);
+ Geom::Point const p_doc = _snapmanager->getDesktop()->dt2doc(p.getPoint());
+
+ Geom::Point direction_vector = c.getDirection();
if (!is_zero(direction_vector)) {
- direction_vector = NR::unit_vector(direction_vector);
+ direction_vector = Geom::unit_vector(direction_vector);
}
-
- NR::Point const p1_on_cl = c.hasPoint() ? c.getPoint() : p;
- NR::Point const p2_on_cl = p1_on_cl + direction_vector;
-
- // The intersection point of the constraint line with any path,
+
+ // The intersection point of the constraint line with any path,
// must lie within two points on the constraintline: p_min_on_cl and p_max_on_cl
- // The distance between those points is twice the max. snapping distance
- NR::Point const p_proj_on_cl = project_on_linesegment(p, p1_on_cl, p2_on_cl);
- NR::Point const p_min_on_cl = desktop->dt2doc(p_proj_on_cl - getDistance() * direction_vector);
- NR::Point const p_max_on_cl = desktop->dt2doc(p_proj_on_cl + getDistance() * direction_vector);
-
+ // The distance between those points is twice the snapping tolerance
+ Geom::Point const p_proj_on_cl = p.getPoint(); // projection has already been taken care of in constrainedSnap in the snapmanager;
+ Geom::Point const p_min_on_cl = _snapmanager->getDesktop()->dt2doc(p_proj_on_cl - getSnapperTolerance() * direction_vector);
+ Geom::Point const p_max_on_cl = _snapmanager->getDesktop()->dt2doc(p_proj_on_cl + getSnapperTolerance() * direction_vector);
+
Geom::Path cl;
- cl.start(p_min_on_cl.to_2geom());
- cl.appendNew<Geom::LineSegment>(p_max_on_cl.to_2geom());
-
- for (std::vector<NArtBpath*>::const_iterator k = _bpaths_to_snap_to->begin(); k != _bpaths_to_snap_to->end(); k++) {
- if (*k) {
- // convert a Path object (see src/livarot/Path.h) to a 2geom's path object (see 2geom/path.h)
- // TODO (Diederik) Only do this once for the first point, needs some storage of pointers in a member variable
- std::vector<Geom::Path> path_2geom = BPath_to_2GeomPath(*k);
-
- for (std::vector<Geom::Path>::const_iterator l = path_2geom.begin(); l != path_2geom.end(); l++) {
- Geom::SimpleCrosser sxr;
- Geom::Crossings crossings = sxr.crossings(*l, cl);
- for (std::vector<Geom::Crossing>::const_iterator m = crossings.begin(); m != crossings.end(); m++) {
- // Reconstruct the point of intersection
- NR::Point p_inters = p_min_on_cl + ((*m).tb) * (p_max_on_cl - p_min_on_cl);
- // When it's within snapping range, then return it
- // (within snapping range == between p_min_on_cl and p_max_on_cl == 0 < tb < 1)
- if ((*m).tb >= 0 && (*m).tb <= 1 ) {
- SnappedPoint s(desktop->doc2dt(p_inters), NR::L2(p_proj_on_cl - p_inters));
- sc.points.push_back(s);
- }
- }
+ std::vector<Geom::Path> clv;
+ cl.start(p_min_on_cl);
+ cl.appendNew<Geom::LineSegment>(p_max_on_cl);
+ clv.push_back(cl);
+
+ for (std::vector<Inkscape::SnapCandidatePath >::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) {
+ if (k->path_vector) {
+ Geom::CrossingSet cs = Geom::crossings(clv, *(k->path_vector));
+ if (cs.size() > 0) {
+ // We need only the first element of cs, because cl is only a single straight linesegment
+ // This first element contains a vector filled with crossings of cl with k->first
+ for (std::vector<Geom::Crossing>::const_iterator m = cs[0].begin(); m != cs[0].end(); m++) {
+ if ((*m).ta >= 0 && (*m).ta <= 1 ) {
+ // Reconstruct the point of intersection
+ Geom::Point p_inters = p_min_on_cl + ((*m).ta) * (p_max_on_cl - p_min_on_cl);
+ // When it's within snapping range, then return it
+ // (within snapping range == between p_min_on_cl and p_max_on_cl == 0 < ta < 1)
+ Geom::Coord dist = Geom::L2(_snapmanager->getDesktop()->dt2doc(p_proj_on_cl) - p_inters);
+ SnappedPoint s(_snapmanager->getDesktop()->doc2dt(p_inters), p.getSourceType(), p.getSourceNum(), k->target_type, dist, getSnapperTolerance(), getSnapperAlwaysSnap(), true, k->target_bbox);
+ sc.points.push_back(s);
+ }
+ }
}
}
}
}
-void Inkscape::ObjectSnapper::_doFreeSnap(SnappedConstraints &sc,
- Inkscape::Snapper::PointType const &t,
- NR::Point const &p,
- bool const &first_point,
- std::vector<NR::Point> &points_to_snap,
- std::list<SPItem const *> const &it) const
+void Inkscape::ObjectSnapper::freeSnap(SnappedConstraints &sc,
+ Inkscape::SnapCandidatePoint const &p,
+ Geom::OptRect const &bbox_to_snap,
+ std::vector<SPItem const *> const *it,
+ std::vector<SnapCandidatePoint> *unselected_nodes) const
{
- if ( NULL == _named_view ) {
+ if (_snap_enabled == false || _snapmanager->snapprefs.getSnapFrom(p.getSourceType()) == false ) {
return;
}
/* Get a list of all the SPItems that we will try to snap to */
- if (first_point) {
- _findCandidates(sp_document_root(_named_view->document), it, first_point, points_to_snap, SNAP_XY);
+ if (p.getSourceNum() == 0) {
+ Geom::Rect const local_bbox_to_snap = bbox_to_snap ? *bbox_to_snap : Geom::Rect(p.getPoint(), p.getPoint());
+ _findCandidates(sp_document_root(_snapmanager->getDocument()), it, p.getSourceNum() == 0, local_bbox_to_snap, TRANSL_SNAP_XY, false, Geom::identity());
}
- if (_snap_to_itemnode || _snap_to_bboxnode) {
- _snapNodes(sc, t, p, first_point, SNAP_XY);
+ if (_snapmanager->snapprefs.getSnapToItemNode() || _snapmanager->snapprefs.getSnapSmoothNodes()
+ || _snapmanager->snapprefs.getSnapToBBoxNode() || _snapmanager->snapprefs.getSnapToPageBorder()
+ || _snapmanager->snapprefs.getSnapLineMidpoints() || _snapmanager->snapprefs.getSnapObjectMidpoints()
+ || _snapmanager->snapprefs.getSnapBBoxEdgeMidpoints() || _snapmanager->snapprefs.getSnapBBoxMidpoints()
+ || _snapmanager->snapprefs.getIncludeItemCenter()) {
+ _snapNodes(sc, p, unselected_nodes);
}
- if (_snap_to_itempath || _snap_to_bboxpath) {
- _snapPaths(sc, t, p, first_point);
+
+ if (_snapmanager->snapprefs.getSnapToItemPath() || _snapmanager->snapprefs.getSnapToBBoxPath() || _snapmanager->snapprefs.getSnapToPageBorder()) {
+ unsigned n = (unselected_nodes == NULL) ? 0 : unselected_nodes->size();
+ if (n > 0) {
+ /* While editing a path in the node tool, findCandidates must ignore that path because
+ * of the node snapping requirements (i.e. only unselected nodes must be snapable).
+ * That path must not be ignored however when snapping to the paths, so we add it here
+ * manually when applicable
+ */
+ SPPath *path = NULL;
+ if (it != NULL) {
+ if (it->size() == 1 && SP_IS_PATH(*it->begin())) {
+ path = SP_PATH(*it->begin());
+ } // else: *it->begin() might be a SPGroup, e.g. when editing a LPE of text that has been converted to a group of paths
+ // as reported in bug #356743. In that case we can just ignore it, i.e. not snap to this item
+ }
+ _snapPaths(sc, p, unselected_nodes, path);
+ } else {
+ _snapPaths(sc, p, NULL, NULL);
+ }
}
}
-
-
-void Inkscape::ObjectSnapper::_doConstrainedSnap( SnappedConstraints &sc,
- Inkscape::Snapper::PointType const &t,
- NR::Point const &p,
- bool const &first_point,
- std::vector<NR::Point> &points_to_snap,
+void Inkscape::ObjectSnapper::constrainedSnap( SnappedConstraints &sc,
+ Inkscape::SnapCandidatePoint const &p,
+ Geom::OptRect const &bbox_to_snap,
ConstraintLine const &c,
- std::list<SPItem const *> const &it) const
+ std::vector<SPItem const *> const *it) const
{
- if ( NULL == _named_view ) {
+ if (_snap_enabled == false || _snapmanager->snapprefs.getSnapFrom(p.getSourceType()) == false) {
return;
}
/* Get a list of all the SPItems that we will try to snap to */
- if (first_point) {
- _findCandidates(sp_document_root(_named_view->document), it, first_point, points_to_snap, SNAP_XY);
+ if (p.getSourceNum() == 0) {
+ Geom::Rect const local_bbox_to_snap = bbox_to_snap ? *bbox_to_snap : Geom::Rect(p.getPoint(), p.getPoint());
+ _findCandidates(sp_document_root(_snapmanager->getDocument()), it, p.getSourceNum() == 0, local_bbox_to_snap, TRANSL_SNAP_XY, false, Geom::identity());
}
-
+
// A constrained snap, is a snap in only one degree of freedom (specified by the constraint line).
- // This is usefull for example when scaling an object while maintaining a fixed aspect ratio. It's
+ // This is useful for example when scaling an object while maintaining a fixed aspect ratio. It's
// nodes are only allowed to move in one direction (i.e. in one degree of freedom).
-
+
// When snapping to objects, we either snap to their nodes or their paths. It is however very
// unlikely that any node will be exactly at the constrained line, so for a constrained snap
// to objects we will only consider the object's paths. Beside, the nodes will be at these paths,
- // so we will more or less snap to them anyhow.
+ // so we will more or less snap to them anyhow.
- if (_snap_to_itempath || _snap_to_bboxpath) {
- _snapPathsConstrained(sc, t, p, first_point, c);
+ if (_snapmanager->snapprefs.getSnapToItemPath() || _snapmanager->snapprefs.getSnapToBBoxPath() || _snapmanager->snapprefs.getSnapToPageBorder()) {
+ _snapPathsConstrained(sc, p, c);
}
}
-
-void Inkscape::ObjectSnapper::guideSnap(SnappedConstraints &sc,
- NR::Point const &p,
- DimensionToSnap const snap_dim) const
+// This method is used to snap a guide to nodes, while dragging the guide around
+void Inkscape::ObjectSnapper::guideFreeSnap(SnappedConstraints &sc,
+ Geom::Point const &p,
+ Geom::Point const &guide_normal) const
{
- if ( NULL == _named_view ) {
- return;
+ /* Get a list of all the SPItems that we will try to snap to */
+ std::vector<SPItem*> cand;
+ std::vector<SPItem const *> const it; //just an empty list
+
+ DimensionToSnap snap_dim;
+ if (guide_normal == to_2geom(component_vectors[Geom::Y])) {
+ snap_dim = GUIDE_TRANSL_SNAP_Y;
+ } else if (guide_normal == to_2geom(component_vectors[Geom::X])) {
+ snap_dim = GUIDE_TRANSL_SNAP_X;
+ } else {
+ snap_dim = ANGLED_GUIDE_TRANSL_SNAP;
}
+ _findCandidates(sp_document_root(_snapmanager->getDocument()), &it, true, Geom::Rect(p, p), snap_dim, false, Geom::identity());
+ _snapTranslatingGuideToNodes(sc, p, guide_normal);
+
+}
+
+// This method is used to snap the origin of a guide to nodes/paths, while dragging the origin along the guide
+void Inkscape::ObjectSnapper::guideConstrainedSnap(SnappedConstraints &sc,
+ Geom::Point const &p,
+ Geom::Point const &guide_normal,
+ ConstraintLine const &/*c*/) const
+{
/* Get a list of all the SPItems that we will try to snap to */
std::vector<SPItem*> cand;
- std::list<SPItem const *> const it; //just an empty list
+ std::vector<SPItem const *> const it; //just an empty list
+
+ DimensionToSnap snap_dim;
+ if (guide_normal == to_2geom(component_vectors[Geom::Y])) {
+ snap_dim = GUIDE_TRANSL_SNAP_Y;
+ } else if (guide_normal == to_2geom(component_vectors[Geom::X])) {
+ snap_dim = GUIDE_TRANSL_SNAP_X;
+ } else {
+ snap_dim = ANGLED_GUIDE_TRANSL_SNAP;
+ }
- std::vector<NR::Point> points_to_snap;
- points_to_snap.push_back(p);
+ _findCandidates(sp_document_root(_snapmanager->getDocument()), &it, true, Geom::Rect(p, p), snap_dim, false, Geom::identity());
+ _snapTranslatingGuideToNodes(sc, p, guide_normal);
- _findCandidates(sp_document_root(_named_view->document), it, true, points_to_snap, snap_dim);
- _snapNodes(sc, Inkscape::Snapper::SNAPPOINT_GUIDE, p, true, snap_dim);
}
/**
*/
bool Inkscape::ObjectSnapper::ThisSnapperMightSnap() const
{
- bool snap_to_something = _snap_to_itempath || _snap_to_itemnode || _snap_to_bboxpath || _snap_to_bboxnode;
- return (_snap_enabled && _snap_from != 0 && snap_to_something);
+ bool snap_to_something = _snapmanager->snapprefs.getSnapToItemPath()
+ || _snapmanager->snapprefs.getSnapToItemNode()
+ || _snapmanager->snapprefs.getSnapToBBoxPath()
+ || _snapmanager->snapprefs.getSnapToBBoxNode()
+ || _snapmanager->snapprefs.getSnapToPageBorder()
+ || _snapmanager->snapprefs.getSnapLineMidpoints() || _snapmanager->snapprefs.getSnapObjectMidpoints()
+ || _snapmanager->snapprefs.getSnapBBoxEdgeMidpoints() || _snapmanager->snapprefs.getSnapBBoxMidpoints()
+ || _snapmanager->snapprefs.getIncludeItemCenter();
+
+ return (_snap_enabled && _snapmanager->snapprefs.getSnapModeBBoxOrNodes() && snap_to_something);
}
-void Inkscape::ObjectSnapper::_clear_paths() const
+bool Inkscape::ObjectSnapper::GuidesMightSnap() const // almost the same as ThisSnapperMightSnap above, but only looking at points (and not paths)
{
- for (std::vector<NArtBpath*>::const_iterator k = _bpaths_to_snap_to->begin(); k != _bpaths_to_snap_to->end(); k++) {
- g_free(*k);
- }
- _bpaths_to_snap_to->clear();
-
- for (std::vector<Path*>::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) {
- delete *k;
+ bool snap_to_something = _snapmanager->snapprefs.getSnapToItemNode()
+ || _snapmanager->snapprefs.getSnapToPageBorder()
+ || (_snapmanager->snapprefs.getSnapModeBBox() && _snapmanager->snapprefs.getSnapToBBoxNode())
+ || (_snapmanager->snapprefs.getSnapModeBBox() && (_snapmanager->snapprefs.getSnapBBoxEdgeMidpoints() || _snapmanager->snapprefs.getSnapBBoxMidpoints()))
+ || (_snapmanager->snapprefs.getSnapModeNode() && (_snapmanager->snapprefs.getSnapLineMidpoints() || _snapmanager->snapprefs.getSnapObjectMidpoints()))
+ || (_snapmanager->snapprefs.getSnapModeNode() && _snapmanager->snapprefs.getIncludeItemCenter())
+ || (_snapmanager->snapprefs.getSnapModeNode() && (_snapmanager->snapprefs.getSnapToItemPath() && _snapmanager->snapprefs.getSnapIntersectionCS()));
+
+ return (_snap_enabled && _snapmanager->snapprefs.getSnapModeGuide() && snap_to_something);
+}
+
+void Inkscape::ObjectSnapper::_clear_paths() const
+{
+ for (std::vector<Inkscape::SnapCandidatePath >::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) {
+ delete k->path_vector;
}
_paths_to_snap_to->clear();
}
+Geom::PathVector* Inkscape::ObjectSnapper::_getBorderPathv() const
+{
+ Geom::Rect const border_rect = Geom::Rect(Geom::Point(0,0), Geom::Point(sp_document_width(_snapmanager->getDocument()),sp_document_height(_snapmanager->getDocument())));
+ return _getPathvFromRect(border_rect);
+}
+
+Geom::PathVector* Inkscape::ObjectSnapper::_getPathvFromRect(Geom::Rect const rect) const
+{
+ SPCurve const *border_curve = SPCurve::new_from_rect(rect);
+ if (border_curve) {
+ Geom::PathVector *dummy = new Geom::PathVector(border_curve->get_pathvector());
+ return dummy;
+ } else {
+ return NULL;
+ }
+}
+
+void Inkscape::ObjectSnapper::_getBorderNodes(std::vector<SnapCandidatePoint> *points) const
+{
+ Geom::Coord w = sp_document_width(_snapmanager->getDocument());
+ Geom::Coord h = sp_document_height(_snapmanager->getDocument());
+ points->push_back(Inkscape::SnapCandidatePoint(Geom::Point(0,0), SNAPSOURCE_UNDEFINED, SNAPTARGET_PAGE_CORNER));
+ points->push_back(Inkscape::SnapCandidatePoint(Geom::Point(0,h), SNAPSOURCE_UNDEFINED, SNAPTARGET_PAGE_CORNER));
+ points->push_back(Inkscape::SnapCandidatePoint(Geom::Point(w,h), SNAPSOURCE_UNDEFINED, SNAPTARGET_PAGE_CORNER));
+ points->push_back(Inkscape::SnapCandidatePoint(Geom::Point(w,0), SNAPSOURCE_UNDEFINED, SNAPTARGET_PAGE_CORNER));
+}
+
+void Inkscape::getBBoxPoints(Geom::OptRect const bbox,
+ std::vector<SnapCandidatePoint> *points,
+ bool const /*isTarget*/,
+ bool const includeCorners,
+ bool const includeLineMidpoints,
+ bool const includeObjectMidpoints)
+{
+ if (bbox) {
+ // collect the corners of the bounding box
+ for ( unsigned k = 0 ; k < 4 ; k++ ) {
+ if (includeCorners) {
+ points->push_back(Inkscape::SnapCandidatePoint(bbox->corner(k), Inkscape::SNAPSOURCE_BBOX_CORNER, 0, Inkscape::SNAPTARGET_BBOX_CORNER, *bbox));
+ }
+ // optionally, collect the midpoints of the bounding box's edges too
+ if (includeLineMidpoints) {
+ points->push_back(Inkscape::SnapCandidatePoint((bbox->corner(k) + bbox->corner((k+1) % 4))/2, Inkscape::SNAPSOURCE_BBOX_EDGE_MIDPOINT, 0, Inkscape::SNAPTARGET_BBOX_EDGE_MIDPOINT, *bbox));
+ }
+ }
+ if (includeObjectMidpoints) {
+ points->push_back(Inkscape::SnapCandidatePoint(bbox->midpoint(), Inkscape::SNAPSOURCE_BBOX_MIDPOINT, 0, Inkscape::SNAPTARGET_BBOX_MIDPOINT, *bbox));
+ }
+ }
+}
+
/*
Local Variables:
mode:c++