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diff --git a/src/object-snapper.cpp b/src/object-snapper.cpp
index c03a7c288414508928e3e810d37ea004629a14a4..88c2607822d16ddb0af335940992f9019902ab50 100644 (file)
--- a/src/object-snapper.cpp
+++ b/src/object-snapper.cpp
*/
#include "svg/svg.h"
-#include "libnr/nr-rect-ops.h"
-#include "libnr/nr-point-fns.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"
}
Inkscape::ObjectSnapper::ObjectSnapper(SnapManager *sm, Geom::Coord const d)
- : Snapper(sm, d), _snap_to_itemnode(true), _snap_to_itempath(true),
- _snap_to_bboxnode(true), _snap_to_bboxpath(true), _snap_to_page_border(false),
- _strict_snapping(true)
+ : Snapper(sm, d)
{
_candidates = new std::vector<SnapCandidate>;
- _points_to_snap_to = new std::vector<Geom::Point>;
- _paths_to_snap_to = new std::vector<Geom::PathVector*>;
+ _points_to_snap_to = new std::vector<std::pair<Geom::Point, int> >;
+ _paths_to_snap_to = new std::vector<std::pair<Geom::PathVector*, SnapTargetType> >;
}
Inkscape::ObjectSnapper::~ObjectSnapper()
delete _paths_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 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 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.
*/
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) && !SP_ITEM(o)->isLocked() && !(_snapmanager->getDesktop()->itemIsHidden(SP_ITEM(o)) && !clip_or_mask)) {
- // Don't snap to locked items, and
- // don't snap to hidden objects, unless they're a clipped path or a mask
+ 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) {
if (bbox_to_snap_incl.intersects(*bbox_of_item)) {
// This item is within snapping range, so record it as a candidate
_candidates->push_back(SnapCandidate(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::SnapPreferences::PointType const &t,
- bool const &first_point) const
+ 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
@@ -176,15 +190,15 @@ void Inkscape::ObjectSnapper::_collectNodes(Inkscape::SnapPreferences::PointType
// 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) {
+ 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
- if (_snap_to_page_border) {
+ // Consider the page border for snapping to
+ if (_snapmanager->snapprefs.getSnapToPageBorder()) {
_getBorderNodes(_points_to_snap_to);
}
@@ -197,53 +211,45 @@ void Inkscape::ObjectSnapper::_collectNodes(Inkscape::SnapPreferences::PointType
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) {
- // 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 (_snap_to_itempath) {
- _snapmanager->snapprefs.setSnapIntersectionCS(false);
- }
+ if (p_is_a_node || !(_snapmanager->snapprefs.getStrictSnapping() && !p_is_a_node) || p_is_a_guide) {
+ // 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, SnapPointsIter(*_points_to_snap_to), &_snapmanager->snapprefs);
+ sp_item_snappoints(root_item, true, *_points_to_snap_to, &_snapmanager->snapprefs);
- if (_snap_to_itempath) {
- _snapmanager->snapprefs.setSnapIntersectionCS(old_pref);
- }
+ 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) {
- // 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);
- 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_a_guide) {
+ // 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());
}
}
}
@@ -253,12 +259,13 @@ void Inkscape::ObjectSnapper::_collectNodes(Inkscape::SnapPreferences::PointType
void Inkscape::ObjectSnapper::_snapNodes(SnappedConstraints &sc,
Inkscape::SnapPreferences::PointType const &t,
Geom::Point const &p,
- bool const &first_point,
- std::vector<Geom::Point> *unselected_nodes) const
+ SnapSourceType const &source_type,
+ long source_num,
+ std::vector<std::pair<Geom::Point, int> > *unselected_nodes) const
{
// Iterate through all nodes, find out which one is the closest to p, and snap to it!
- _collectNodes(t, first_point);
+ _collectNodes(t, source_num == 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<Geom::Point>::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) {
- Geom::Coord dist = Geom::L2(*k - p);
+ for (std::vector<std::pair<Geom::Point, int> >::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) {
+ Geom::Coord dist = Geom::L2((*k).first - p);
if (dist < getSnapperTolerance() && dist < s.getSnapDistance()) {
- s = SnappedPoint(*k, SNAPTARGET_NODE, dist, getSnapperTolerance(), getSnapperAlwaysSnap(), true);
+ s = SnappedPoint((*k).first, source_type, source_num, static_cast<Inkscape::SnapTargetType>((*k).second), dist, getSnapperTolerance(), getSnapperAlwaysSnap(), true);
success = true;
}
}
@@ -288,25 +295,27 @@ void Inkscape::ObjectSnapper::_snapTranslatingGuideToNodes(SnappedConstraints &s
// Iterate through all nodes, find out which one is the closest to this guide, and snap to it!
_collectNodes(t, 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(t, true);
+ _snapPaths(sc, t, p, SNAPSOURCE_GUIDE, 0, NULL, NULL);
+ // The paths themselves should be discarded in findBestSnap(), as we should only snap to their intersections
+ }
+
SnappedPoint s;
- bool success = false;
Geom::Coord tol = getSnapperTolerance();
- for (std::vector<Geom::Point>::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) {
+ for (std::vector<std::pair<Geom::Point, int> >::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 = project_on_linesegment(*k, p, p + Geom::rot90(guide_normal));
- Geom::Coord dist = Geom::L2(*k - p_proj); // distance from node to the guide
+ Geom::Point p_proj = Geom::projection((*k).first, Geom::Line(p, p + Geom::rot90(guide_normal)));
+ Geom::Coord dist = Geom::L2((*k).first - 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() && dist < s.getSnapDistance())) {
- s = SnappedPoint(*k, SNAPTARGET_NODE, dist, tol, getSnapperAlwaysSnap(), true);
- success = true;
+ if ((dist < tol && dist2 < tol) || getSnapperAlwaysSnap()) {
+ s = SnappedPoint((*k).first, SNAPSOURCE_GUIDE, 0, static_cast<Inkscape::SnapTargetType>((*k).second), dist, tol, getSnapperAlwaysSnap(), true);
+ sc.points.push_back(s);
}
}
-
- if (success) {
- sc.points.push_back(s);
- }
}
@@ -327,8 +336,9 @@ void Inkscape::ObjectSnapper::_collectPaths(Inkscape::SnapPreferences::PointType
SPItem::BBoxType bbox_type = SPItem::GEOMETRIC_BBOX;
bool p_is_a_node = t & Inkscape::SnapPreferences::SNAPPOINT_NODE;
+ bool p_is_a_guide = t & Inkscape::SnapPreferences::SNAPPOINT_GUIDE;
- if (_snap_to_bboxpath) {
+ if (_snapmanager->snapprefs.getSnapToBBoxPath()) {
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
int prefs_bbox = prefs->getBool("/tools/bounding_box", 0);
bbox_type = !prefs_bbox ?
@@ -336,10 +346,10 @@ void Inkscape::ObjectSnapper::_collectPaths(Inkscape::SnapPreferences::PointType
}
// Consider the page border for snapping
- if (_snap_to_page_border) {
+ if (_snapmanager->snapprefs.getSnapToPageBorder()) {
Geom::PathVector *border_path = _getBorderPathv();
if (border_path != NULL) {
- _paths_to_snap_to->push_back(border_path);
+ _paths_to_snap_to->push_back(std::make_pair(border_path, SNAPTARGET_PAGE_BORDER));
}
}
@@ -361,8 +371,8 @@ void Inkscape::ObjectSnapper::_collectPaths(Inkscape::SnapPreferences::PointType
//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_a_guide || !(_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
@@ -387,7 +397,7 @@ void Inkscape::ObjectSnapper::_collectPaths(Inkscape::SnapPreferences::PointType
if (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(borderpathv); // Perhaps for speed, get a reference to the Geom::pathvector, and store the transformation besides it.
+ _paths_to_snap_to->push_back(std::make_pair(borderpathv, SNAPTARGET_PATH)); // Perhaps for speed, get a reference to the Geom::pathvector, and store the transformation besides it.
curve->unref();
}
}
@@ -395,8 +405,8 @@ void Inkscape::ObjectSnapper::_collectPaths(Inkscape::SnapPreferences::PointType
}
//Add the item's bounding box to snap to
- if (_snap_to_bboxpath) {
- if (!(_strict_snapping && p_is_a_node)) {
+ if (_snapmanager->snapprefs.getSnapToBBoxPath()) {
+ if (p_is_a_guide || !(_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) {
@@ -404,7 +414,7 @@ void Inkscape::ObjectSnapper::_collectPaths(Inkscape::SnapPreferences::PointType
sp_item_invoke_bbox(root_item, rect, i2doc, TRUE, bbox_type);
if (rect) {
Geom::PathVector *path = _getPathvFromRect(*rect);
- _paths_to_snap_to->push_back(path);
+ _paths_to_snap_to->push_back(std::make_pair(path, SNAPTARGET_BBOX_EDGE));
}
}
}
@@ -416,19 +426,20 @@ void Inkscape::ObjectSnapper::_collectPaths(Inkscape::SnapPreferences::PointType
void Inkscape::ObjectSnapper::_snapPaths(SnappedConstraints &sc,
Inkscape::SnapPreferences::PointType const &t,
Geom::Point const &p,
- bool const &first_point,
- std::vector<Geom::Point> *unselected_nodes,
+ SnapSourceType const &source_type,
+ long source_num,
+ std::vector<std::pair<Geom::Point, int> > *unselected_nodes,
SPPath const *selected_path) const
{
- _collectPaths(t, first_point);
+ _collectPaths(t, source_num == 0);
// Now we can finally do the real snapping, using the paths collected above
g_assert(_snapmanager->getDesktop() != NULL);
Geom::Point const p_doc = _snapmanager->getDesktop()->dt2doc(p);
- bool const node_tool_active = _snap_to_itempath && selected_path != NULL;
+ bool const node_tool_active = _snapmanager->snapprefs.getSnapToItemPath() && selected_path != NULL;
- if (first_point) {
+ if (source_num == 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.
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(pathv);
+ _paths_to_snap_to->push_back(std::make_pair(pathv, SNAPTARGET_PATH));
curve->unref();
}
}
}
- for (std::vector<Geom::PathVector*>::const_iterator it_p = _paths_to_snap_to->begin(); it_p != _paths_to_snap_to->end(); it_p++) {
+ for (std::vector<std::pair<Geom::PathVector*, SnapTargetType> >::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) == _paths_to_snap_to->back());
//if true then this pathvector it_pv is currently being edited in the node tool
- // char * svgd = sp_svg_write_path(**it_p);
+ // char * svgd = sp_svg_write_path(**it_p->first);
// std::cout << "Dumping the pathvector: " << svgd << std::endl;
- for(Geom::PathVector::iterator it_pv = (*it_p)->begin(); it_pv != (*it_p)->end(); ++it_pv) {
+ for(Geom::PathVector::iterator it_pv = (it_p->first)->begin(); it_pv != (it_p->first)->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);
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));
+ sc.curves.push_back(Inkscape::SnappedCurve(sp_dt, dist, getSnapperTolerance(), getSnapperAlwaysSnap(), false, curve, source_type, source_num, it_p->second));
}
}
}
}
/* Returns true if point is coincident with one of the unselected nodes */
-bool Inkscape::ObjectSnapper::isUnselectedNode(Geom::Point const &point, std::vector<Geom::Point> const *unselected_nodes) const
+bool Inkscape::ObjectSnapper::isUnselectedNode(Geom::Point const &point, std::vector<std::pair<Geom::Point, int> > const *unselected_nodes) const
{
if (unselected_nodes == NULL) {
return false;
@@ -510,8 +521,8 @@ bool Inkscape::ObjectSnapper::isUnselectedNode(Geom::Point const &point, std::ve
return false;
}
- for (std::vector<Geom::Point>::const_iterator i = unselected_nodes->begin(); i != unselected_nodes->end(); i++) {
- if (Geom::L2(point - *i) < 1e-4) {
+ for (std::vector<std::pair<Geom::Point, int> >::const_iterator i = unselected_nodes->begin(); i != unselected_nodes->end(); i++) {
+ if (Geom::L2(point - (*i).first) < 1e-4) {
return true;
}
}
@@ -522,11 +533,12 @@ bool Inkscape::ObjectSnapper::isUnselectedNode(Geom::Point const &point, std::ve
void Inkscape::ObjectSnapper::_snapPathsConstrained(SnappedConstraints &sc,
Inkscape::SnapPreferences::PointType const &t,
Geom::Point const &p,
- bool const &first_point,
+ SnapSourceType const source_type,
+ long source_num,
ConstraintLine const &c) const
{
- _collectPaths(t, first_point);
+ _collectPaths(t, source_num == 0);
// Now we can finally do the real snapping, using the paths collected above
direction_vector = Geom::unit_vector(direction_vector);
}
- Geom::Point const p1_on_cl = c.hasPoint() ? c.getPoint() : p;
- Geom::Point const p2_on_cl = p1_on_cl + direction_vector;
-
// 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 snapping tolerance
- Geom::Point const p_proj_on_cl = project_on_linesegment(p, p1_on_cl, p2_on_cl);
+ Geom::Point const p_proj_on_cl = p; // 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);
cl.appendNew<Geom::LineSegment>(p_max_on_cl);
clv.push_back(cl);
- for (std::vector<Geom::PathVector*>::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) {
- if (*k) {
- Geom::CrossingSet cs = Geom::crossings(clv, *(*k));
+ for (std::vector<std::pair<Geom::PathVector*, SnapTargetType> >::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) {
+ if (k->first) {
+ Geom::CrossingSet cs = Geom::crossings(clv, *(k->first));
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
+ // 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
// 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), SNAPTARGET_PATH, dist, getSnapperTolerance(), getSnapperAlwaysSnap(), true);
+ SnappedPoint s(_snapmanager->getDesktop()->doc2dt(p_inters), source_type, source_num, k->second, dist, getSnapperTolerance(), getSnapperAlwaysSnap(), true);
sc.points.push_back(s);
}
}
void Inkscape::ObjectSnapper::freeSnap(SnappedConstraints &sc,
Inkscape::SnapPreferences::PointType const &t,
Geom::Point const &p,
- bool const &first_point,
+ SnapSourceType const &source_type,
+ long source_num,
Geom::OptRect const &bbox_to_snap,
std::vector<SPItem const *> const *it,
- std::vector<Geom::Point> *unselected_nodes) const
+ std::vector<std::pair<Geom::Point, int> > *unselected_nodes) const
{
if (_snap_enabled == false || _snapmanager->snapprefs.getSnapFrom(t) == false ) {
return;
}
/* Get a list of all the SPItems that we will try to snap to */
- if (first_point) {
+ if (source_num == 0) {
Geom::Rect const local_bbox_to_snap = bbox_to_snap ? *bbox_to_snap : Geom::Rect(p, p);
- _findCandidates(sp_document_root(_snapmanager->getDocument()), it, first_point, local_bbox_to_snap, TRANSL_SNAP_XY, false, Geom::identity());
+ _findCandidates(sp_document_root(_snapmanager->getDocument()), it, source_num == 0, local_bbox_to_snap, TRANSL_SNAP_XY, false, Geom::identity());
}
- if (_snap_to_itemnode || _snap_to_bboxnode || _snap_to_page_border) {
- _snapNodes(sc, t, p, first_point, unselected_nodes);
+ 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, t, p, source_type, source_num, unselected_nodes);
}
- if (_snap_to_itempath || _snap_to_bboxpath || _snap_to_page_border) {
+ 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
*/
SPPath *path = NULL;
if (it != NULL) {
- g_assert(SP_IS_PATH(*it->begin()));
- g_assert(it->size() == 1);
- path = SP_PATH(*it->begin());
+ 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, t, p, first_point, unselected_nodes, path);
+ _snapPaths(sc, t, p, source_type, source_num, unselected_nodes, path);
} else {
- _snapPaths(sc, t, p, first_point, NULL, NULL);
+ _snapPaths(sc, t, p, source_type, source_num, NULL, NULL);
}
}
}
void Inkscape::ObjectSnapper::constrainedSnap( SnappedConstraints &sc,
Inkscape::SnapPreferences::PointType const &t,
Geom::Point const &p,
- bool const &first_point,
+ SnapSourceType const &source_type,
+ long source_num,
Geom::OptRect const &bbox_to_snap,
ConstraintLine const &c,
std::vector<SPItem const *> const *it) const
}
/* Get a list of all the SPItems that we will try to snap to */
- if (first_point) {
+ if (source_num == 0) {
Geom::Rect const local_bbox_to_snap = bbox_to_snap ? *bbox_to_snap : Geom::Rect(p, p);
- _findCandidates(sp_document_root(_snapmanager->getDocument()), it, first_point, local_bbox_to_snap, TRANSL_SNAP_XY, false, Geom::identity());
+ _findCandidates(sp_document_root(_snapmanager->getDocument()), it, source_num == 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
// 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.
- if (_snap_to_itempath || _snap_to_bboxpath || _snap_to_page_border) {
- _snapPathsConstrained(sc, t, p, first_point, c);
+ if (_snapmanager->snapprefs.getSnapToItemPath() || _snapmanager->snapprefs.getSnapToBBoxPath() || _snapmanager->snapprefs.getSnapToPageBorder()) {
+ _snapPathsConstrained(sc, t, p, source_type, 0, c);
}
}
// This method is used to snap a guide to nodes, while dragging the guide around
-void Inkscape::ObjectSnapper::guideSnap(SnappedConstraints &sc,
+void Inkscape::ObjectSnapper::guideFreeSnap(SnappedConstraints &sc,
Geom::Point const &p,
Geom::Point const &guide_normal) const
{
snap_dim = ANGLED_GUIDE_TRANSL_SNAP;
}
- // We don't support ANGLED_GUIDE_ROT_SNAP yet.
+ _findCandidates(sp_document_root(_snapmanager->getDocument()), &it, true, Geom::Rect(p, p), snap_dim, false, Geom::identity());
+ _snapTranslatingGuideToNodes(sc, Inkscape::SnapPreferences::SNAPPOINT_GUIDE, p, guide_normal);
+
+}
- // It would be cool to allow the user to rotate a guide by dragging it, instead of
- // only translating it. (For example when CTRL is pressed). We will need an UI part
- // for that first; and some important usability choices need to be made:
- // E.g. which point should be used for pivoting? A previously snapped point,
- // or a transformation center (which can be moved after clicking for the
- // second time on an object; but should this point then be constrained to the
- // line, or can it be located anywhere?)
+// 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::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, Inkscape::SnapPreferences::SNAPPOINT_GUIDE, p, guide_normal);
- // _snapRotatingGuideToNodes has not been implemented yet.
+
}
/**
*/
bool Inkscape::ObjectSnapper::ThisSnapperMightSnap() const
{
- bool snap_to_something = _snap_to_itempath || _snap_to_itemnode || _snap_to_bboxpath || _snap_to_bboxnode || _snap_to_page_border;
+ 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);
}
-bool Inkscape::ObjectSnapper::GuidesMightSnap() const
+bool Inkscape::ObjectSnapper::GuidesMightSnap() const // almost the same as ThisSnapperMightSnap above, but only looking at points (and not paths)
{
- bool snap_to_something = _snap_to_itemnode || _snap_to_bboxnode;
+ 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<Geom::PathVector*>::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) {
- g_free(*k);
+ for (std::vector<std::pair<Geom::PathVector*, SnapTargetType> >::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) {
+ g_free(k->first);
}
_paths_to_snap_to->clear();
}
@@ -726,14 +771,33 @@ Geom::PathVector* Inkscape::ObjectSnapper::_getPathvFromRect(Geom::Rect const re
}
}
-void Inkscape::ObjectSnapper::_getBorderNodes(std::vector<Geom::Point> *points) const
+void Inkscape::ObjectSnapper::_getBorderNodes(std::vector<std::pair<Geom::Point, int> > *points) const
{
Geom::Coord w = sp_document_width(_snapmanager->getDocument());
Geom::Coord h = sp_document_height(_snapmanager->getDocument());
- points->push_back(Geom::Point(0,0));
- points->push_back(Geom::Point(0,h));
- points->push_back(Geom::Point(w,h));
- points->push_back(Geom::Point(w,0));
+ points->push_back(std::make_pair(Geom::Point(0,0), SNAPTARGET_PAGE_CORNER));
+ points->push_back(std::make_pair(Geom::Point(0,h), SNAPTARGET_PAGE_CORNER));
+ points->push_back(std::make_pair(Geom::Point(w,h), SNAPTARGET_PAGE_CORNER));
+ points->push_back(std::make_pair(Geom::Point(w,0), SNAPTARGET_PAGE_CORNER));
+}
+
+void Inkscape::getBBoxPoints(Geom::OptRect const bbox, std::vector<std::pair<Geom::Point, int> > *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(std::make_pair((bbox->corner(k)), isTarget ? int(Inkscape::SNAPTARGET_BBOX_CORNER) : int(Inkscape::SNAPSOURCE_BBOX_CORNER)));
+ }
+ // optionally, collect the midpoints of the bounding box's edges too
+ if (includeLineMidpoints) {
+ points->push_back(std::make_pair((bbox->corner(k) + bbox->corner((k+1) % 4))/2, isTarget ? int(Inkscape::SNAPTARGET_BBOX_EDGE_MIDPOINT) : int(Inkscape::SNAPSOURCE_BBOX_EDGE_MIDPOINT)));
+ }
+ }
+ if (includeObjectMidpoints) {
+ points->push_back(std::make_pair(bbox->midpoint(), isTarget ? int(Inkscape::SNAPTARGET_BBOX_MIDPOINT) : int(Inkscape::SNAPSOURCE_BBOX_MIDPOINT)));
+ }
+ }
}
/*