Inkscape::GuideSnapper::LineList Inkscape::GuideSnapper::_getSnapLines(Geom::Point const &/*p*/) const
{
LineList s;
if ( NULL == _snapmanager->getNamedView() || ThisSnapperMightSnap() == false) {
return s;
}
SPGuide const *guide_to_ignore = _snapmanager->getGuideToIgnore();
for (GSList const *l = _snapmanager->getNamedView()->guides; l != NULL; l = l->next) {
SPGuide const *g = SP_GUIDE(l->data);
if (g != guide_to_ignore) {
s.push_back(std::make_pair(g->normal_to_line, g->point_on_line));
}
}
return s;
}
void Inkscape::ObjectSnapper::constrainedSnap( IntermSnapResults &isr,
SnapCandidatePoint const &p,
Geom::OptRect const &bbox_to_snap,
SnapConstraint const &c,
std::vector<SPItem const *> const *it,
std::vector<SnapCandidatePoint> *unselected_nodes) const
{
if (_snap_enabled == false || _snapmanager->snapprefs.isSourceSnappable(p.getSourceType()) == false || ThisSnapperMightSnap() == false) {
return;
}
// project the mouse pointer onto the constraint. Only the projected point will be considered for snapping
Geom::Point pp = c.projection(p.getPoint());
/* Get a list of all the SPItems that we will try to snap to */
if (p.getSourceNum() <= 0) {
Geom::Rect const local_bbox_to_snap = bbox_to_snap ? *bbox_to_snap : Geom::Rect(pp, pp);
_findCandidates(_snapmanager->getDocument()->getRoot(), it, p.getSourceNum() <= 0, local_bbox_to_snap, false, Geom::identity());
}
// A constrained snap, is a snap in only one degree of freedom (specified by the constraint line).
// 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).
_snapNodes(isr, p, unselected_nodes, c, pp);
if (_snapmanager->snapprefs.isTargetSnappable(SNAPTARGET_PATH, SNAPTARGET_PATH_INTERSECTION, SNAPTARGET_BBOX_EDGE, SNAPTARGET_PAGE_BORDER, SNAPTARGET_TEXT_BASELINE)) {
_snapPathsConstrained(isr, p, c, pp);
}
}
void Inkscape::ObjectSnapper::freeSnap(IntermSnapResults &isr,
SnapCandidatePoint const &p,
Geom::OptRect const &bbox_to_snap,
std::vector<SPItem const *> const *it,
std::vector<SnapCandidatePoint> *unselected_nodes) const
{
if (_snap_enabled == false || _snapmanager->snapprefs.isSourceSnappable(p.getSourceType()) == false || ThisSnapperMightSnap() == false) {
return;
}
/* Get a list of all the SPItems that we will try to snap to */
if (p.getSourceNum() <= 0) {
Geom::Rect const local_bbox_to_snap = bbox_to_snap ? *bbox_to_snap : Geom::Rect(p.getPoint(), p.getPoint());
_findCandidates(_snapmanager->getDocument()->getRoot(), it, p.getSourceNum() <= 0, local_bbox_to_snap, false, Geom::identity());
}
_snapNodes(isr, p, unselected_nodes);
if (_snapmanager->snapprefs.isTargetSnappable(SNAPTARGET_PATH, SNAPTARGET_PATH_INTERSECTION, SNAPTARGET_BBOX_EDGE, SNAPTARGET_PAGE_BORDER, SNAPTARGET_TEXT_BASELINE)) {
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(isr, p, unselected_nodes, path);
} else {
_snapPaths(isr, p, NULL, NULL);
}
}
}
