void SnapManager::freeSnapReturnByRef(Geom::Point &p,
Inkscape::SnapSourceType const source_type,
Geom::OptRect const &bbox_to_snap) const
{
Inkscape::SnappedPoint const s = freeSnap(Inkscape::SnapCandidatePoint(p, source_type, Inkscape::SNAPTARGET_PATH), bbox_to_snap);
s.getPointIfSnapped(p);
}
void SnapManager::guideConstrainedSnap(Geom::Point &p, SPGuide const &guideline) const
{
if (!snapprefs.getSnapEnabledGlobally() || snapprefs.getSnapPostponedGlobally() || !snapprefs.isTargetSnappable(Inkscape::SNAPTARGET_GUIDE)) {
return;
}
Inkscape::SnapCandidatePoint candidate(p, Inkscape::SNAPSOURCE_GUIDE_ORIGIN, Inkscape::SNAPTARGET_UNDEFINED);
IntermSnapResults isr;
Inkscape::Snapper::SnapConstraint cl(guideline.getPoint(), Geom::rot90(guideline.getNormal()));
SnapperList snappers = getSnappers();
for (SnapperList::const_iterator i = snappers.begin(); i != snappers.end(); ++i) {
(*i)->constrainedSnap(isr, candidate, Geom::OptRect(), cl, NULL, NULL);
}
Inkscape::SnappedPoint const s = findBestSnap(candidate, isr, false);
s.getPointIfSnapped(p);
}
void SnapManager::guideFreeSnap(Geom::Point &p, Geom::Point &origin_or_vector, bool origin, bool freeze_angle) const
{
if (freeze_angle && origin) {
g_warning("Dear developer, when snapping guides you shouldn't ask me to freeze the guide's vector when you haven't specified one");
// You've supplied me with an origin instead of a vector
}
if (!snapprefs.getSnapEnabledGlobally() || snapprefs.getSnapPostponedGlobally() || !snapprefs.isTargetSnappable(Inkscape::SNAPTARGET_GUIDE)) {
return;
}
Inkscape::SnapCandidatePoint candidate(p, Inkscape::SNAPSOURCE_GUIDE);
if (origin) {
candidate.addOrigin(origin_or_vector);
} else {
candidate = Inkscape::SnapCandidatePoint(p, Inkscape::SNAPSOURCE_GUIDE_ORIGIN);
candidate.addVector(Geom::rot90(origin_or_vector));
}
IntermSnapResults isr;
SnapperList snappers = getSnappers();
for (SnapperList::const_iterator i = snappers.begin(); i != snappers.end(); ++i) {
(*i)->freeSnap(isr, candidate, Geom::OptRect(), NULL, NULL);
}
Inkscape::SnappedPoint const s = findBestSnap(candidate, isr, false);
s.getPointIfSnapped(p);
if (!freeze_angle && s.getSnapped()) {
if (!Geom::are_near(s.getTangent(), Geom::Point(0,0))) { // If the tangent has been set ...
origin_or_vector = Geom::rot90(s.getTangent()); // then use it to update the normal of the guide
// PS: The tangent might not have been set if we snapped for example to a node
}
}
}