X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=src%2Fobject-snapper.cpp;h=43651f002405e12ced35ea1743a6862668ec5bfb;hb=8a2e76b7021b9b960d7c30801a1a14461d9b5939;hp=41866b41ca4c1cd0e076389e5c9704bddc3bd685;hpb=fd119acbea67db412896f0b3c3c270c8785102b7;p=inkscape.git diff --git a/src/object-snapper.cpp b/src/object-snapper.cpp index 41866b41c..43651f002 100644 --- a/src/object-snapper.cpp +++ b/src/object-snapper.cpp @@ -5,18 +5,21 @@ * Authors: * Carl Hetherington * Diederik van Lierop + * Jon A. Cruz + * Abhishek Sharma * - * Copyright (C) 2005 - 2008 Authors + * Copyright (C) 2005 - 2010 Authors * * Released under GNU GPL, read the file 'COPYING' for more information */ #include "svg/svg.h" -#include "libnr/nr-rect-ops.h" -#include "libnr/nr-point-fns.h" #include <2geom/path-intersection.h> +#include <2geom/pathvector.h> #include <2geom/point.h> #include <2geom/rect.h> +#include <2geom/line.h> +#include <2geom/circle.h> #include "document.h" #include "sp-namedview.h" #include "sp-image.h" @@ -25,7 +28,7 @@ #include "sp-use.h" #include "display/curve.h" #include "inkscape.h" -#include "prefs-utils.h" +#include "preferences.h" #include "sp-text.h" #include "sp-flowtext.h" #include "text-editing.h" @@ -34,23 +37,12 @@ #include "helper/geom-curves.h" #include "desktop.h" -Inkscape::SnapCandidate::SnapCandidate(SPItem* item, bool clip_or_mask, Geom::Matrix additional_affine) - : item(item), clip_or_mask(clip_or_mask), additional_affine(additional_affine) -{ -} - -Inkscape::SnapCandidate::~SnapCandidate() -{ -} - -Inkscape::ObjectSnapper::ObjectSnapper(SnapManager const *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), _include_item_center(false) +Inkscape::ObjectSnapper::ObjectSnapper(SnapManager *sm, Geom::Coord const d) + : Snapper(sm, d) { - _candidates = new std::vector; - _points_to_snap_to = new std::vector; - _paths_to_snap_to = new std::vector; + _candidates = new std::vector; + _points_to_snap_to = new std::vector; + _paths_to_snap_to = new std::vector; } Inkscape::ObjectSnapper::~ObjectSnapper() @@ -65,42 +57,56 @@ 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. */ void Inkscape::ObjectSnapper::_findCandidates(SPObject* parent, std::vector const *it, bool const &first_point, 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 { - bool const c1 = (snap_dim == TRANSL_SNAP_XY) && ThisSnapperMightSnap(); - bool const c2 = (snap_dim != TRANSL_SNAP_XY) && GuidesMightSnap(); - - if (!(c1 || c2)) { - return; + if (!ThisSnapperMightSnap()) { + return; } - + + if (_snapmanager->getDesktop() == NULL) { + g_warning("desktop == NULL, so we cannot snap; please inform the developpers of this bug"); + // Apparently the etup() method from the SnapManager class hasn't been called before trying to snap. + } + if (first_point) { _candidates->clear(); } - + 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)) { + + for ( SPObject *o = parent->firstChild(); o; o = o->getNext() ) { 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::const_iterator i; if (it != NULL) { @@ -109,52 +115,49 @@ void Inkscape::ObjectSnapper::_findCandidates(SPObject* parent, i++; } } - + if (it == NULL || i == it->end()) { - SPItem *item = SP_ITEM(o); - Geom::Matrix transform = Geom::identity(); + SPItem *item = SP_ITEM(o); if (item) { SPObject *obj = NULL; - if (clip_or_mask) { // If the current item is a clipping path or a mask - // then store the transformation of the clipped path or mask itself - // but also take into account the additional affine of the object - // being clipped / masked - transform = to_2geom(item->transform) * additional_affine; - } else { // cannot clip or mask more than once + 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, item->transform); - } + _findCandidates(obj, it, false, bbox_to_snap, true, item->i2doc_affine()); + } obj = SP_OBJECT(item->mask_ref->getObject()); if (obj) { - _findCandidates(obj, it, false, bbox_to_snap, snap_dim, true, item->transform); + _findCandidates(obj, it, false, bbox_to_snap, true, item->i2doc_affine()); } } - } - + } + if (SP_IS_GROUP(o)) { - _findCandidates(o, it, false, bbox_to_snap, snap_dim, false, Geom::identity()); + _findCandidates(o, it, false, bbox_to_snap, clip_or_mask, additional_affine); } else { - boost::optional bbox_of_item = NR::Rect(); + 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, - from_2geom(to_2geom(sp_item_i2doc_affine(item)) * matrix_to_desktop(additional_affine, item)), + item->invoke_bbox(bbox_of_item, + item->i2doc_affine() * additional_affine * _snapmanager->getDesktop()->doc2dt(), true); } else { - sp_item_invoke_bbox(item, bbox_of_item, sp_item_i2d_affine(item), true); + item->invoke_bbox( bbox_of_item, item->i2d_affine(), true); } if (bbox_of_item) { - // See if the item is within range - if (bbox_to_snap_incl.intersects(to_2geom(*bbox_of_item))) { + // See if the item is within range + if (bbox_to_snap_incl.intersects(*bbox_of_item) + || (_snapmanager->snapprefs.getIncludeItemCenter() && bbox_to_snap_incl.contains(item->getCenter()))) { // rotation center might be outside of the bounding box // This item is within snapping range, so record it as a candidate - _candidates->push_back(SnapCandidate(item, clip_or_mask, additional_affine)); - } + _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->getId() << std::endl; + } } } } @@ -163,37 +166,38 @@ void Inkscape::ObjectSnapper::_findCandidates(SPObject* parent, } -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) { - int prefs_bbox = prefs_get_int_attribute("tools", "bounding_box", 0); - bbox_type = (prefs_bbox == 0)? + 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 - if (_snap_to_page_border) { - _getBorderNodes(_points_to_snap_to); + + // Consider the page border for snapping to + if (_snapmanager->snapprefs.getSnapToPageBorder()) { + _getBorderNodes(_points_to_snap_to); } - for (std::vector::const_iterator i = _candidates->begin(); i != _candidates->end(); i++) { + for (std::vector::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)) { @@ -202,90 +206,137 @@ void Inkscape::ObjectSnapper::_collectNodes(Inkscape::Snapper::PointType const & 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) { - std::vector dummy_vctr; - sp_item_snappoints(root_item, _include_item_center, SnapPointsIter(dummy_vctr)); - to_2geom(dummy_vctr, *_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); } - } - //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) { - boost::optional b = sp_item_bbox_desktop(root_item, bbox_type); - if (b) { - for ( unsigned k = 0 ; k < 4 ; k++ ) { - _points_to_snap_to->push_back(to_2geom(b->corner(k))); - } + // We should not snap a transformation center to any of the centers of the items in the + // current selection (see the comment in SelTrans::centerRequest()) + bool old_pref2 = _snapmanager->snapprefs.getIncludeItemCenter(); + if (old_pref2) { + for ( GSList const *itemlist = _snapmanager->getRotationCenterSource(); itemlist != NULL; itemlist = g_slist_next(itemlist) ) { + if ((*i).item == reinterpret_cast(itemlist->data)) { + // don't snap to this item's rotation center + _snapmanager->snapprefs.setIncludeItemCenter(false); + break; } } } + + root_item->getSnappoints(*_points_to_snap_to, &_snapmanager->snapprefs); + + // restore the original snap preferences + _snapmanager->snapprefs.setSnapIntersectionCS(old_pref); + _snapmanager->snapprefs.setIncludeItemCenter(old_pref2); + } + + //Collect the bounding box's corners so we can snap to them + 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 = root_item->getBboxDesktop(bbox_type); + getBBoxPoints(b, _points_to_snap_to, true, _snapmanager->snapprefs.getSnapToBBoxNode(), _snapmanager->snapprefs.getSnapBBoxEdgeMidpoints(), _snapmanager->snapprefs.getSnapBBoxMidpoints()); + } } } } } void Inkscape::ObjectSnapper::_snapNodes(SnappedConstraints &sc, - Inkscape::Snapper::PointType const &t, - Geom::Point const &p, - bool const &first_point, - std::vector *unselected_nodes) const + Inkscape::SnapCandidatePoint const &p, + std::vector *unselected_nodes, + SnapConstraint const &c, + Geom::Point const &p_proj_on_constraint) const { // Iterate through all nodes, find out which one is the closest to p, and snap to it! - - _collectNodes(t, first_point); - - if (unselected_nodes != NULL) { + + _collectNodes(p.getSourceType(), p.getSourceNum() <= 0); + + if (unselected_nodes != NULL && unselected_nodes->size() > 0) { + g_assert(_points_to_snap_to != 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::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) { - Geom::Coord dist = Geom::L2(*k - p); - if (dist < getSnapperTolerance() && dist < s.getDistance()) { - s = SnappedPoint(*k, SNAPTARGET_NODE, dist, getSnapperTolerance(), getSnapperAlwaysSnap()); + + for (std::vector::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) { + Geom::Point target_pt = (*k).getPoint(); + Geom::Coord dist = NR_HUGE; + if (!c.isUndefined()) { + // We're snapping to nodes along a constraint only, so find out if this node + // is at the constraint, while allowing for a small margin + if (Geom::L2(target_pt - c.projection(target_pt)) > 1e-9) { + // The distance from the target point to its projection on the constraint + // is too large, so this point is not on the constraint. Skip it! + continue; + } + dist = Geom::L2(target_pt - p_proj_on_constraint); + } else { + // Free (unconstrained) snapping + dist = Geom::L2(target_pt - p.getPoint()); + } + + if (dist < getSnapperTolerance() && dist < s.getSnapDistance()) { + s = SnappedPoint(target_pt, p.getSourceType(), p.getSourceNum(), (*k).getTargetType(), dist, getSnapperTolerance(), getSnapperAlwaysSnap(), false, true, (*k).getTargetBBox()); success = true; } } if (success) { - sc.points.push_back(s); + sc.points.push_back(s); } } -void Inkscape::ObjectSnapper::_snapTranslatingGuideToNodes(SnappedConstraints &sc, - Inkscape::Snapper::PointType const &t, +void Inkscape::ObjectSnapper::_snapTranslatingGuide(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(t, true); - + _collectNodes(SNAPSOURCE_GUIDE, true); + + if (_snapmanager->snapprefs.getSnapToItemPath() || _snapmanager->snapprefs.getSnapToBBoxPath() || _snapmanager->snapprefs.getSnapToPageBorder()) { + _collectPaths(p, SNAPSOURCE_GUIDE, true); + _snapPaths(sc, Inkscape::SnapCandidatePoint(p, SNAPSOURCE_GUIDE), NULL, NULL); + } + SnappedPoint s; - bool success = false; - + Geom::Coord tol = getSnapperTolerance(); - - for (std::vector::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) { + + for (std::vector::const_iterator k = _points_to_snap_to->begin(); k != _points_to_snap_to->end(); k++) { + Geom::Point target_pt = (*k).getPoint(); // 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(target_pt, Geom::Line(p, p + Geom::rot90(guide_normal))); + Geom::Coord dist = Geom::L2(target_pt - 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.getDistance()) { - s = SnappedPoint(*k, SNAPTARGET_NODE, dist, tol, getSnapperAlwaysSnap()); - success = true; + if ((dist < tol && dist2 < tol) || getSnapperAlwaysSnap()) { + s = SnappedPoint(target_pt, SNAPSOURCE_GUIDE, 0, (*k).getTargetType(), dist, tol, getSnapperAlwaysSnap(), false, true, (*k).getTargetBBox()); + sc.points.push_back(s); } } - - if (success) { - sc.points.push_back(s); - } } @@ -293,7 +344,8 @@ void Inkscape::ObjectSnapper::_snapTranslatingGuideToNodes(SnappedConstraints &s * Returns index of first NR_END bpath in array. */ -void Inkscape::ObjectSnapper::_collectPaths(Inkscape::Snapper::PointType const &t, +void Inkscape::ObjectSnapper::_collectPaths(Geom::Point /*p*/, + Inkscape::SnapSourceType const source_type, 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, @@ -301,27 +353,29 @@ 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) { - int prefs_bbox = prefs_get_int_attribute("tools", "bounding_box", 0); - bbox_type = (prefs_bbox ==0)? + + bool p_is_a_node = source_type & Inkscape::SNAPSOURCE_NODE_CATEGORY; + bool p_is_other = source_type & 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 (_snap_to_page_border) { + if (_snapmanager->snapprefs.getSnapToPageBorder() && _snapmanager->snapprefs.getSnapModeBBoxOrNodes()) { Geom::PathVector *border_path = _getBorderPathv(); if (border_path != NULL) { - _paths_to_snap_to->push_back(border_path); + _paths_to_snap_to->push_back(Inkscape::SnapCandidatePath(border_path, SNAPTARGET_PAGE_BORDER, Geom::OptRect())); } } - - for (std::vector::const_iterator i = _candidates->begin(); i != _candidates->end(); i++) { + + for (std::vector::const_iterator i = _candidates->begin(); i != _candidates->end(); i++) { /* Transform the requested snap point to this item's coordinates */ Geom::Matrix i2doc(Geom::identity()); @@ -332,15 +386,15 @@ void Inkscape::ObjectSnapper::_collectPaths(Inkscape::Snapper::PointType const & root_item = sp_use_root(SP_USE((*i).item)); g_return_if_fail(root_item); } else { - i2doc = sp_item_i2doc_affine((*i).item); + i2doc = (*i).item->i2doc_affine(); 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() && _snapmanager->snapprefs.getSnapModeNode()) { + 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 @@ -361,11 +415,16 @@ 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) { - // 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. + // We will get our own copy of the pathvector, which must be freed at some point + + // Geom::PathVector *pv = pathvector_for_curve(root_item, curve, true, true, Geom::identity(), (*i).additional_affine); + + Geom::PathVector *pv = new Geom::PathVector(curve->get_pathvector()); + (*pv) *= root_item->i2d_affine() * (*i).additional_affine * _snapmanager->getDesktop()->doc2dt(); // (_edit_transform * _i2d_transform); + + _paths_to_snap_to->push_back(Inkscape::SnapCandidatePath(pv, SNAPTARGET_PATH, Geom::OptRect())); // Perhaps for speed, get a reference to the Geom::pathvector, and store the transformation besides it. curve->unref(); } } @@ -373,173 +432,216 @@ void Inkscape::ObjectSnapper::_collectPaths(Inkscape::Snapper::PointType const & } //Add the item's bounding box to snap to - if (_snap_to_bboxpath) { - if (!(_strict_snapping && p_is_a_node)) { + if (_snapmanager->snapprefs.getSnapToBBoxPath() && _snapmanager->snapprefs.getSnapModeBBox()) { + 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) { - NRRect rect; - sp_item_invoke_bbox(root_item, &rect, i2doc, TRUE, bbox_type); - Geom::Rect const rect2 = to_2geom(*rect.upgrade()); - Geom::PathVector *path = _getPathvFromRect(rect2); - _paths_to_snap_to->push_back(path); + if (!(*i).clip_or_mask) { + Geom::OptRect rect; + root_item->invoke_bbox( rect, i2doc, TRUE, bbox_type); + if (rect) { + Geom::PathVector *path = _getPathvFromRect(*rect); + rect = root_item->getBboxDesktop(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, - Geom::Point const &p, - bool const &first_point, - std::vector *unselected_nodes, + Inkscape::SnapCandidatePoint const &p, + std::vector *unselected_nodes, SPPath const *selected_path) const { - _collectPaths(t, first_point); + _collectPaths(p.getPoint(), p.getSourceType(), p.getSourceNum() <= 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; - - if (first_point) { - /* 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). + + 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. - * - * Note that this path must be the last in line! - * */ - if (node_tool_active) { - SPCurve *curve = curve_for_item(SP_ITEM(selected_path)); + * 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(pathv); + _paths_to_snap_to->push_back(Inkscape::SnapCandidatePath(pathv, SNAPTARGET_PATH, Geom::OptRect(), true)); curve->unref(); } } } - - for (std::vector::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()); + + int num_path = 0; + int num_segm = 0; + + for (std::vector::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 - - // char * svgd = sp_svg_write_path(**it_p); - // 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->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 anp = (*it_pv).nearestPointPerCurve(p_doc); - + std::vector::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; + 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 + * 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 - */ + * 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)); + 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); + + 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(from_2geom(sp_dt), dist, getSnapperTolerance(), getSnapperAlwaysSnap(), curve)); + sc.curves.push_back(Inkscape::SnappedCurve(sp_dt, num_path, num_segm, dist, getSnapperTolerance(), getSnapperAlwaysSnap(), false, curve, p.getSourceType(), p.getSourceNum(), it_p->target_type, it_p->target_bbox)); } } - } - } // End of: for (Geom::PathVector::iterator ....) - } + } + num_segm++; + } // End of: for (Geom::PathVector::iterator ....) + num_path++; + } } -/* Returns true if point is coincident with one of the unselected nodes */ -bool Inkscape::ObjectSnapper::isUnselectedNode(Geom::Point const &point, std::vector const *unselected_nodes) const +/* Returns true if point is coincident with one of the unselected nodes */ +bool Inkscape::ObjectSnapper::isUnselectedNode(Geom::Point const &point, std::vector const *unselected_nodes) const { if (unselected_nodes == NULL) { return false; } - + if (unselected_nodes->size() == 0) { return false; } - - for (std::vector::const_iterator i = unselected_nodes->begin(); i != unselected_nodes->end(); i++) { - if (Geom::L2(point - *i) < 1e-4) { + + for (std::vector::const_iterator i = unselected_nodes->begin(); i != unselected_nodes->end(); i++) { + if (Geom::L2(point - (*i).getPoint()) < 1e-4) { return true; - } - } - - return false; + } + } + + return false; } void Inkscape::ObjectSnapper::_snapPathsConstrained(SnappedConstraints &sc, - Inkscape::Snapper::PointType const &t, - Geom::Point const &p, - bool const &first_point, - ConstraintLine const &c) const + Inkscape::SnapCandidatePoint const &p, + SnapConstraint const &c, + Geom::Point const &p_proj_on_constraint) const { - - _collectPaths(t, first_point); - + + _collectPaths(p_proj_on_constraint, p.getSourceType(), p.getSourceNum() <= 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); - + Geom::Point const p_doc = _snapmanager->getDesktop()->dt2doc(p_proj_on_constraint); + Geom::Point direction_vector = c.getDirection(); if (!is_zero(direction_vector)) { 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_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; - std::vector clv; - cl.start(p_min_on_cl); - cl.appendNew(p_max_on_cl); - clv.push_back(cl); - - for (std::vector::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) { - if (*k) { - Geom::CrossingSet cs = Geom::crossings(clv, *(*k)); - 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 - for (std::vector::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), SNAPTARGET_PATH, dist, getSnapperTolerance(), getSnapperAlwaysSnap()); - sc.points.push_back(s); - } - } + + // The intersection point of the constraint line with any path, must lie within two points on the + // SnapConstraint: p_min_on_cl and p_max_on_cl. The distance between those points is twice the snapping tolerance + Geom::Point const p_min_on_cl = _snapmanager->getDesktop()->dt2doc(p_proj_on_constraint - getSnapperTolerance() * direction_vector); + Geom::Point const p_max_on_cl = _snapmanager->getDesktop()->dt2doc(p_proj_on_constraint + getSnapperTolerance() * direction_vector); + Geom::Coord tolerance = getSnapperTolerance(); + + // PS: Because the paths we're about to snap to are all expressed relative to document coordinate system, we will have + // to convert the snapper coordinates from the desktop coordinates to document coordinates + + std::vector constraint_path; + if (c.isCircular()) { + Geom::Circle constraint_circle(_snapmanager->getDesktop()->dt2doc(c.getPoint()), c.getRadius()); + constraint_circle.getPath(constraint_path); + } else { + Geom::Path constraint_line; + constraint_line.start(p_min_on_cl); + constraint_line.appendNew(p_max_on_cl); + constraint_path.push_back(constraint_line); + } + // Length of constraint_path will always be one + + // Find all intersections of the constrained path with the snap target candidates + std::vector intersections; + for (std::vector::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) { + if (k->path_vector) { + // Do the intersection math + Geom::CrossingSet cs = Geom::crossings(constraint_path, *(k->path_vector)); + // Store the results as intersection points + unsigned int index = 0; + for (Geom::CrossingSet::const_iterator i = cs.begin(); i != cs.end(); i++) { + if (index >= constraint_path.size()) { + break; + } + // Reconstruct and store the points of intersection + for (Geom::Crossings::const_iterator m = (*i).begin(); m != (*i).end(); m++) { + intersections.push_back(constraint_path[index].pointAt((*m).ta)); + } + index++; + } + + //Geom::crossings will not consider the closing segment apparently, so we'll handle that separately here + //TODO: This should have been fixed in rev. #9859, which makes this workaround obsolete + for(Geom::PathVector::iterator it_pv = k->path_vector->begin(); it_pv != k->path_vector->end(); ++it_pv) { + if (it_pv->closed()) { + // Get the closing linesegment and convert it to a path + Geom::Path cls; + cls.close(false); + cls.append(it_pv->back_closed()); + // Intersect that closing path with the constrained path + Geom::Crossings cs = Geom::crossings(constraint_path.front(), cls); + // Reconstruct and store the points of intersection + index = 0; // assuming the constraint path vector has only one path + for (Geom::Crossings::const_iterator m = cs.begin(); m != cs.end(); m++) { + intersections.push_back(constraint_path[index].pointAt((*m).ta)); + } + } + } + + // Convert the collected points of intersection to snapped points + for (std::vector::iterator p_inters = intersections.begin(); p_inters != intersections.end(); p_inters++) { + // Convert to desktop coordinates + (*p_inters) = _snapmanager->getDesktop()->doc2dt(*p_inters); + // Construct a snapped point + Geom::Coord dist = Geom::L2(p.getPoint() - *p_inters); + SnappedPoint s = SnappedPoint(*p_inters, p.getSourceType(), p.getSourceNum(), k->target_type, dist, getSnapperTolerance(), getSnapperAlwaysSnap(), true, k->target_bbox);; + // Store the snapped point + if (dist <= tolerance) { // If the intersection is within snapping range, then we might snap to it + sc.points.push_back(s); + } } } } @@ -547,112 +649,140 @@ void Inkscape::ObjectSnapper::_snapPathsConstrained(SnappedConstraints &sc, void Inkscape::ObjectSnapper::freeSnap(SnappedConstraints &sc, - Inkscape::Snapper::PointType const &t, - Geom::Point const &p, - bool const &first_point, - boost::optional const &bbox_to_snap, + Inkscape::SnapCandidatePoint const &p, + Geom::OptRect const &bbox_to_snap, std::vector const *it, - std::vector *unselected_nodes) const + std::vector *unselected_nodes) const { - if (_snap_enabled == false || getSnapFrom(t) == false ) { + 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) { - 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()); + 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()); } - - if (_snap_to_itemnode || _snap_to_bboxnode || _snap_to_page_border) { - _snapNodes(sc, t, p, first_point, unselected_nodes); + + // TODO: Argh, UGLY! Get rid of this here, move this logic to the snap manager + bool snap_nodes = (_snapmanager->snapprefs.getSnapModeNode() && ( + _snapmanager->snapprefs.getSnapToItemNode() || + _snapmanager->snapprefs.getSnapSmoothNodes() || + _snapmanager->snapprefs.getSnapLineMidpoints() || + _snapmanager->snapprefs.getSnapObjectMidpoints() + )) || (_snapmanager->snapprefs.getSnapModeBBox() && ( + _snapmanager->snapprefs.getSnapToBBoxNode() || + _snapmanager->snapprefs.getSnapBBoxEdgeMidpoints() || + _snapmanager->snapprefs.getSnapBBoxMidpoints() + )) || (_snapmanager->snapprefs.getSnapModeBBoxOrNodes() && ( + _snapmanager->snapprefs.getIncludeItemCenter() || + _snapmanager->snapprefs.getSnapToPageBorder() + )); + + if (snap_nodes) { + _snapNodes(sc, p, unselected_nodes); } - - if (_snap_to_itempath || _snap_to_bboxpath || _snap_to_page_border) { + + if ((_snapmanager->snapprefs.getSnapModeNode() && _snapmanager->snapprefs.getSnapToItemPath()) || + (_snapmanager->snapprefs.getSnapModeBBox() && _snapmanager->snapprefs.getSnapToBBoxPath()) || + (_snapmanager->snapprefs.getSnapModeBBoxOrNodes() && _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 + /* 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) { - 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, p, unselected_nodes, path); } else { - _snapPaths(sc, t, p, first_point, NULL, NULL); - } + _snapPaths(sc, p, NULL, NULL); + } } } void Inkscape::ObjectSnapper::constrainedSnap( SnappedConstraints &sc, - Inkscape::Snapper::PointType const &t, - Geom::Point const &p, - bool const &first_point, - boost::optional const &bbox_to_snap, - ConstraintLine const &c, - std::vector const *it) const + Inkscape::SnapCandidatePoint const &p, + Geom::OptRect const &bbox_to_snap, + SnapConstraint const &c, + std::vector const *it, + std::vector *unselected_nodes) const { - if (_snap_enabled == false || getSnapFrom(t) == false) { + if (_snap_enabled == false || _snapmanager->snapprefs.getSnapFrom(p.getSourceType()) == 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 (first_point) { - 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()); + 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 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. - - if (_snap_to_itempath || _snap_to_bboxpath || _snap_to_page_border) { - _snapPathsConstrained(sc, t, p, first_point, c); + + // TODO: Argh, UGLY! Get rid of this here, move this logic to the snap manager + bool snap_nodes = (_snapmanager->snapprefs.getSnapModeNode() && ( + _snapmanager->snapprefs.getSnapToItemNode() || + _snapmanager->snapprefs.getSnapSmoothNodes() || + _snapmanager->snapprefs.getSnapLineMidpoints() || + _snapmanager->snapprefs.getSnapObjectMidpoints() + )) || (_snapmanager->snapprefs.getSnapModeBBox() && ( + _snapmanager->snapprefs.getSnapToBBoxNode() || + _snapmanager->snapprefs.getSnapBBoxEdgeMidpoints() || + _snapmanager->snapprefs.getSnapBBoxMidpoints() + )) || (_snapmanager->snapprefs.getSnapModeBBoxOrNodes() && ( + _snapmanager->snapprefs.getIncludeItemCenter() || + _snapmanager->snapprefs.getSnapToPageBorder() + )); + + if (snap_nodes) { + _snapNodes(sc, p, unselected_nodes, c, pp); + } + + if (_snapmanager->snapprefs.getSnapToItemPath() || _snapmanager->snapprefs.getSnapToBBoxPath() || _snapmanager->snapprefs.getSnapToPageBorder()) { + _snapPathsConstrained(sc, p, c, pp); } } // 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 { /* Get a list of all the SPItems that we will try to snap to */ std::vector cand; std::vector 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; - } - - // We don't support ANGLED_GUIDE_ROT_SNAP yet. - - // 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?) - - _findCandidates(sp_document_root(_snapmanager->getDocument()), &it, true, Geom::Rect(p, p), snap_dim, false, Geom::identity()); - _snapTranslatingGuideToNodes(sc, Inkscape::Snapper::SNAPPOINT_GUIDE, p, guide_normal); - // _snapRotatingGuideToNodes has not been implemented yet. + + _findCandidates(_snapmanager->getDocument()->getRoot(), &it, true, Geom::Rect(p, p), false, Geom::identity()); + _snapTranslatingGuide(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, + SnapConstraint const &/*c*/) const +{ + /* Get a list of all the SPItems that we will try to snap to */ + std::vector cand; + std::vector const it; //just an empty list + + _findCandidates(_snapmanager->getDocument()->getRoot(), &it, true, Geom::Rect(p, p), false, Geom::identity()); + _snapTranslatingGuide(sc, p, guide_normal); + } /** @@ -660,49 +790,82 @@ void Inkscape::ObjectSnapper::guideSnap(SnappedConstraints &sc, */ 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; - return (_snap_enabled && _snap_from != 0 && snap_to_something); + bool snap_to_something = (_snapmanager->snapprefs.getSnapModeNode() && ( + _snapmanager->snapprefs.getSnapToItemPath() || + _snapmanager->snapprefs.getSnapToItemNode() || + _snapmanager->snapprefs.getSnapSmoothNodes() || + _snapmanager->snapprefs.getSnapLineMidpoints() || + _snapmanager->snapprefs.getSnapObjectMidpoints() + )) || (_snapmanager->snapprefs.getSnapModeBBox() && ( + _snapmanager->snapprefs.getSnapToBBoxPath() || + _snapmanager->snapprefs.getSnapToBBoxNode() || + _snapmanager->snapprefs.getSnapBBoxEdgeMidpoints() || + _snapmanager->snapprefs.getSnapBBoxMidpoints() + )) || (_snapmanager->snapprefs.getSnapModeBBoxOrNodes() && ( + _snapmanager->snapprefs.getSnapToPageBorder() || + _snapmanager->snapprefs.getIncludeItemCenter() + )); + + return (_snap_enabled && snap_to_something); } -bool Inkscape::ObjectSnapper::GuidesMightSnap() const +void Inkscape::ObjectSnapper::_clear_paths() const { - bool snap_to_something = _snap_to_itemnode || _snap_to_bboxnode; - return (_snap_enabled && (_snap_from & SNAPPOINT_GUIDE) && snap_to_something); -} - -void Inkscape::ObjectSnapper::_clear_paths() const -{ - for (std::vector::const_iterator k = _paths_to_snap_to->begin(); k != _paths_to_snap_to->end(); k++) { - g_free(*k); + for (std::vector::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::Rect const border_rect = Geom::Rect(Geom::Point(0,0), Geom::Point((_snapmanager->getDocument())->getWidth(),(_snapmanager->getDocument())->getHeight())); + return _getPathvFromRect(border_rect); } Geom::PathVector* Inkscape::ObjectSnapper::_getPathvFromRect(Geom::Rect const rect) const { - SPCurve const *border_curve = SPCurve::new_from_rect(rect); + SPCurve const *border_curve = SPCurve::new_from_rect(rect, true); if (border_curve) { Geom::PathVector *dummy = new Geom::PathVector(border_curve->get_pathvector()); return dummy; } else { return NULL; - } + } } -void Inkscape::ObjectSnapper::_getBorderNodes(std::vector *points) const +void Inkscape::ObjectSnapper::_getBorderNodes(std::vector *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)); + Geom::Coord w = (_snapmanager->getDocument())->getWidth(); + Geom::Coord h = (_snapmanager->getDocument())->getHeight(); + 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 *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, -1, 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, -1, Inkscape::SNAPTARGET_BBOX_EDGE_MIDPOINT, *bbox)); + } + } + if (includeObjectMidpoints) { + points->push_back(Inkscape::SnapCandidatePoint(bbox->midpoint(), Inkscape::SNAPSOURCE_BBOX_MIDPOINT, -1, Inkscape::SNAPTARGET_BBOX_MIDPOINT, *bbox)); + } + } } /*