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| -rw-r--r-- | src/distribution-snapper.cpp | 648 |
1 files changed, 648 insertions, 0 deletions
diff --git a/src/distribution-snapper.cpp b/src/distribution-snapper.cpp new file mode 100644 index 0000000..b5ed582 --- /dev/null +++ b/src/distribution-snapper.cpp @@ -0,0 +1,648 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** \file + * Snapping equidistant objects + * + * Authors: + * Parth Pant <parthpant4@gmail.com> + * + * Copyright (C) 2021 Authors + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <2geom/circle.h> +#include <2geom/line.h> +#include <2geom/path-intersection.h> +#include <2geom/path-sink.h> +#include <memory> + +#include "desktop.h" +#include "display/curve.h" +#include "document.h" +#include "inkscape.h" +#include "live_effects/effect-enum.h" +#include "object/sp-clippath.h" +#include "object/sp-flowtext.h" +#include "object/sp-image.h" +#include "object/sp-item-group.h" +#include "object/sp-mask.h" +#include "object/sp-namedview.h" +#include "object/sp-path.h" +#include "object/sp-root.h" +#include "object/sp-shape.h" +#include "object/sp-text.h" +#include "object/sp-use.h" +#include "path/path-util.h" // curve_for_item +#include "preferences.h" +#include "style.h" +#include "svg/svg.h" + +#define DISTRIBUTION_SNAPPING_EPSILON 0.5e-4f + +static bool compare_double(double x, double y, double epsilon = DISTRIBUTION_SNAPPING_EPSILON) +{ + if (abs(x - y) < epsilon) + return true; + return false; +} + +static int sortBoxesRight(Geom::Rect const &a, Geom::Rect const &b) +{ + if (a.midpoint().x() < b.midpoint().x()) + return 1; + return 0; +} + +static int sortBoxesLeft(Geom::Rect const &a, Geom::Rect const &b) +{ + if (a.midpoint().x() > b.midpoint().x()) + return 1; + return 0; +} + +static int sortBoxesUp(Geom::Rect const &a, Geom::Rect const &b) +{ + if (a.midpoint().y() > b.midpoint().y()) + return 1; + return 0; +} + +static int sortBoxesDown(Geom::Rect const &a, Geom::Rect const &b) +{ + if (a.midpoint().y() < b.midpoint().y()) + return 1; + return 0; +} + +Inkscape::DistributionSnapper::DistributionSnapper(SnapManager *sm, Geom::Coord const d) + : Snapper(sm, d) +{ + _bboxes_right = std::make_unique<std::vector<Geom::Rect>>(); + _bboxes_left = std::make_unique<std::vector<Geom::Rect>>(); + _bboxes_up = std::make_unique<std::vector<Geom::Rect>>(); + _bboxes_down = std::make_unique<std::vector<Geom::Rect>>(); +} + +Inkscape::DistributionSnapper::~DistributionSnapper() +{ + _bboxes_right->clear(); + _bboxes_left->clear(); + _bboxes_up->clear(); + _bboxes_down->clear(); +} + +Geom::Coord Inkscape::DistributionSnapper::distRight(Geom::Rect const &a, Geom::Rect const &b) +{ + return -a.max().x() + b.min().x(); +} + +Geom::Coord Inkscape::DistributionSnapper::distLeft(Geom::Rect const &a, Geom::Rect const &b) +{ + return a.min().x() - b.max().x(); +} + +Geom::Coord Inkscape::DistributionSnapper::distUp(Geom::Rect const &a, Geom::Rect const &b) +{ + return a.min().y() - b.max().y(); +} + +Geom::Coord Inkscape::DistributionSnapper::distDown(Geom::Rect const &a, Geom::Rect const &b) +{ + return -a.max().y() + b.min().y(); +} + +bool Inkscape::DistributionSnapper::_findSidewaysSnaps( + Geom::Rect const &source_bbox, + std::vector<Geom::Rect>::iterator it, + std::vector<Geom::Rect>::iterator end, + std::vector<Geom::Rect> &vec, + Geom::Coord &dist, + Geom::Coord tol, + std::function<Geom::Coord(Geom::Rect const &, Geom::Rect const &)> const &distance_func, + int level) const +{ + std::vector<Geom::Rect>::iterator next_bbox = it; + std::vector<Geom::Rect>::iterator _next_bbox = it; + + if (level == 0) { + int max_length = 0; + + // check each consecutive box for a snap + Geom::Rect optimum_start; + while (std::next(next_bbox) != end) { + auto first_dist = distance_func(source_bbox, *next_bbox); + level = 0; + + // temporary result for this particular item + std::vector<Geom::Rect> result; + if (_findSidewaysSnaps(*next_bbox, ++it, end, result, first_dist, tol, distance_func, ++level)) { + if (result.size() > max_length) { + // if this item has the most number of items equidistant form each other + // then make this the final result + optimum_start = *next_bbox; + max_length = result.size(); + vec = result; + dist = first_dist; + } + } + + ++next_bbox; + } + + // if there is no snap, just add the first item and return false + // this is useful to find in-between snaps (see _snapEquidistantPoints()) + if (max_length == 0) { + vec.push_back(*_next_bbox); + return false; + } else { + // insert the first item to the list, this does not happen automatically if level==1 (see below) + vec.insert(vec.begin(), optimum_start); + return true; + } + } + + // if not the zeroth level + if (level != 1) + vec.push_back(source_bbox); + + if (it == end || level > 10) + return true; + + int og_level = level; + std::vector<Geom::Rect> best_result; + + while (next_bbox != end) { + level = og_level; + Geom::Coord this_dist; + Geom::Coord next_dist = distance_func(source_bbox, *next_bbox); + + std::vector<Geom::Rect> temp_result; + + if (level == 1 && compare_double(dist, next_dist, tol)){ + // if this is the first level, check if the snap is within tolerance + // we cancel here if the possible snap in not whithing tolerance, saves us some time! + this_dist = next_dist; + if (_findSidewaysSnaps(*next_bbox, ++it, end, temp_result, this_dist, tol, distance_func, ++level)) { + if (temp_result.size() > 0) { + dist = this_dist; + best_result = temp_result; + break; + } + } + + } else if (compare_double(dist, next_dist, level * DISTRIBUTION_SNAPPING_EPSILON)) { + + if (_findSidewaysSnaps(*next_bbox, ++it, end, temp_result, dist, tol, distance_func, ++level)) { + if (temp_result.size() > 0) { + best_result = temp_result; + break; + } + } + } + + if (best_result.size() > 10) + break; + + ++next_bbox; + } + + vec.insert(vec.end(), best_result.begin(), best_result.end()); + return true; +} + +void Inkscape::DistributionSnapper::_collectBBoxes(Geom::OptRect const &bbox_to_snap, bool const &first_point) const +{ + if (!first_point) + return; + + _bboxes_right->clear(); + _bboxes_left->clear(); + _bboxes_down->clear(); + _bboxes_up->clear(); + + SPItem::BBoxType bbox_type = SPItem::GEOMETRIC_BBOX; + + Preferences *prefs = Preferences::get(); + bool prefs_bbox = prefs->getBool("/tools/bounding_box"); + bbox_type = !prefs_bbox ? SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX; + + // collect bounding boxes of other objects + for (const auto &candidate : *(_snapmanager->_align_snapper_candidates)) { + SPItem *root_item = candidate.item; + + // get the root item in case we have a duplicate at hand + SPUse *use = dynamic_cast<SPUse *>(candidate.item); + if (use) { + root_item = use->root(); + } + g_return_if_fail(root_item); + + // if candidate is not a clip or a mask object then extract its BBox points + if (!candidate.clip_or_mask) { + Geom::OptRect b = root_item->desktopBounds(bbox_type); + if (!b.intersects(bbox_to_snap)) { + auto diff_vec = b->midpoint() - bbox_to_snap->midpoint(); + + Geom::Rect Xbounds = *bbox_to_snap; + Xbounds.expandBy(_snapmanager->_desktop->get_display_area().maxExtent(), 0); + + Geom::Rect Ybounds = *bbox_to_snap; + Ybounds.expandBy(0, _snapmanager->_desktop->get_display_area().maxExtent()); + + if (Xbounds.intersects(b)) { + if (diff_vec.x() > 0) { + _bboxes_right->push_back(*b); + } else { + _bboxes_left->push_back(*b); + } + } else if (Ybounds.intersects(b)) { + if (diff_vec.y() < 0) { + _bboxes_up->push_back(*b); + } else { + _bboxes_down->push_back(*b); + } + } + } + } + } + + std::stable_sort(_bboxes_right->begin(), _bboxes_right->end(), sortBoxesRight); + std::stable_sort(_bboxes_left->begin(), _bboxes_left->end(), sortBoxesLeft); + std::stable_sort(_bboxes_up->begin(), _bboxes_up->end(), sortBoxesUp); + std::stable_sort(_bboxes_down->begin(), _bboxes_down->end(), sortBoxesDown); + + _addBBoxForIntersectingBoxes(_bboxes_right.get(), Direction::RIGHT); + _addBBoxForIntersectingBoxes(_bboxes_left.get(), Direction::LEFT); + _addBBoxForIntersectingBoxes(_bboxes_up.get(), Direction::UP); + _addBBoxForIntersectingBoxes(_bboxes_down.get(), Direction::DOWN); +} + +void Inkscape::DistributionSnapper::_addBBoxForIntersectingBoxes(std::vector<Geom::Rect> *vec, Direction dir) const { + if (vec->size() < 1) { + return; + } + + int count = 0; + std::vector<std::pair<int, Geom::Rect>> insertPositions; + + for (auto it = vec->begin(); it != vec->end(); it++, count++) { + Geom::Rect comb(*it); + int num = 0; + int insertPos = count; + + while (std::next(it) != vec->end() && it->intersects(*std::next(it))) { + comb.unionWith(*std::next(it)); + ++it; + ++num; + ++count; + } + + if (num > 0) { + insertPositions.emplace_back(insertPos, comb); + } + } + + if (insertPositions.size() != 0) { + // TODO: Does this improve performance? + vec->reserve(vec->size() + insertPositions.size()); + + count = 0; + for (auto pair : insertPositions) { + vec->insert(vec->begin() + pair.first + count, pair.second); + ++count; + } + } +} + +void Inkscape::DistributionSnapper::_snapEquidistantPoints(IntermSnapResults &isr, + SnapCandidatePoint const &p, + Geom::OptRect const &bbox_to_snap, + std::vector<SnapCandidatePoint> *unselected_nodes, + SnapConstraint const &c, + Geom::Point const &p_proj_on_constraint) const +{ + bool consider_x = true; + bool consider_y = true; + if (!c.isUndefined() && c.isLinear()) { + if (c.getDirection().x() == 0) + consider_x = false; // consider horizontal snapping if moving vertically + else + consider_y = false; // consider vertical snapping if moving horizontally + } + + _collectBBoxes(bbox_to_snap, p.getSourceNum() <= 0); + + Geom::Coord offset; + + if (p.getSourceType() != SNAPSOURCE_BBOX_MIDPOINT) + return; + + Geom::Coord equal_dist; + + SnappedPoint sr, sl, sx, su, sd, sy; + Geom::Coord dist_x, dist_y; + bool snap_x = false, snap_y = false; + + // 1. look right + // if there is a snap then add right bboxes and look left, if there is a snap to the left then + // add those bboxes too + std::vector<Geom::Rect> vecRight; + std::vector<Geom::Rect> vecLeft; + if (consider_x && _bboxes_right->size() > 0) { + if (_findSidewaysSnaps(*bbox_to_snap, _bboxes_right->begin(), _bboxes_right->end(), vecRight, equal_dist, getSnapperTolerance(), &DistributionSnapper::distRight)) { + auto first_dist = distRight(*bbox_to_snap, vecRight.front()); + Geom::Coord offset = first_dist - equal_dist; + Geom::Point target = bbox_to_snap->midpoint() + Geom::Point(offset, 0); + + Geom::Affine translation = Geom::Translate(target - bbox_to_snap->midpoint()); + Geom::Rect bbox = *bbox_to_snap * translation; + vecRight.insert(vecRight.begin(), bbox); + + _correctSelectionBBox(target, p.getPoint(), *bbox_to_snap); + + if (_bboxes_left->size() > 0) { + first_dist = distLeft(bbox, _bboxes_left->front()); + Geom::Coord left_dist; + vecLeft.clear(); + if (_findSidewaysSnaps(*bbox_to_snap, _bboxes_left->begin(), _bboxes_left->end(), vecLeft, left_dist, getSnapperTolerance(), &DistributionSnapper::distLeft)) { + if (compare_double(left_dist, equal_dist)) { + std::reverse(vecLeft.begin(), vecLeft.end()); + vecRight.insert(vecRight.begin(), vecLeft.begin(), vecLeft.end()); + } + + } else if (compare_double(first_dist, equal_dist)) { + vecRight.insert(vecRight.begin(), vecLeft.front()); + } + } + + dist_x = abs(offset); + sx = SnappedPoint(target, vecRight, bbox, equal_dist, p.getSourceType(), p.getSourceNum(), SNAPTARGET_DISTRIBUTION_RIGHT, dist_x, getSnapperTolerance(), getSnapperAlwaysSnap(), false, true); + snap_x = true; + } + } + + // 2. if no snap to right, look left + // if there is a snap then add left bboxes and right left, if there is a snap to the right then + // add those bboxes too + if (consider_x && !snap_x && _bboxes_left->size() > 0) { + vecLeft.clear(); + if (_findSidewaysSnaps(*bbox_to_snap, _bboxes_left->begin(), _bboxes_left->end(), vecLeft, equal_dist, getSnapperTolerance(), &DistributionSnapper::distLeft)) { + auto first_dist = distLeft(*bbox_to_snap, vecLeft.front()); + Geom::Coord offset = first_dist - equal_dist; + Geom::Point target = bbox_to_snap->midpoint() - Geom::Point(offset, 0); + + // translate the source bbox to the snap position + Geom::Affine translation = Geom::Translate(target - bbox_to_snap->midpoint()); + Geom::Rect bbox = *bbox_to_snap * translation; + std::reverse(vecLeft.begin(), vecLeft.end()); + vecLeft.push_back(bbox); + + _correctSelectionBBox(target, p.getPoint(), *bbox_to_snap); + + if (_bboxes_right->size() > 0) { + first_dist = distRight(bbox, _bboxes_right->front()); + Geom::Coord right_dist; + vecRight.clear(); + if (_findSidewaysSnaps(*bbox_to_snap, _bboxes_right->begin(), _bboxes_right->end(), vecRight, right_dist, getSnapperTolerance(), &DistributionSnapper::distRight)) { + if (compare_double(right_dist, equal_dist)) { + vecLeft.insert(vecLeft.end(), vecRight.begin(), vecRight.end()); + } + + } else if (compare_double(first_dist, equal_dist)) { + vecLeft.push_back(vecRight.front()); + } + } + + dist_x = abs(offset); + sx = SnappedPoint(target, vecLeft, bbox, equal_dist, p.getSourceType(), p.getSourceNum(), SNAPTARGET_DISTRIBUTION_LEFT, dist_x, getSnapperTolerance(), getSnapperAlwaysSnap(), false, true); + snap_x = true; + } + } + + // 3. if no snap to right or left just add the center snap + if (consider_x && !snap_x && vecRight.size() > 0 && vecLeft.size() > 0) { + auto x = Geom::Point((vecRight.front().min() + vecLeft.front().max()) / 2).x(); + offset = abs(x - bbox_to_snap->midpoint().x()); + if (offset < getSnapperTolerance()) { + Geom::Point target = Geom::Point(x, bbox_to_snap->midpoint().y()); + // translate the source bbox to the snap position + Geom::Affine translation = Geom::Translate(target - bbox_to_snap->midpoint()); + Geom::Rect bbox = *bbox_to_snap * translation; + std::vector<Geom::Rect> bboxes = {vecLeft.front(), bbox, vecRight.front()}; + + _correctSelectionBBox(target, p.getPoint(), *bbox_to_snap); + + equal_dist = bbox.min().x() - vecLeft.front().max().x(); + sx = SnappedPoint(target, bboxes, bbox, equal_dist, p.getSourceType(), p.getSourceNum(), SNAPTARGET_DISTRIBUTION_X, offset, getSnapperTolerance(), getSnapperAlwaysSnap(), false, true); + snap_x = true; + } + } + + // 1. look Up + // if there is a snap then add top bboxes and look down, if there is a snap at the bottom then + // add those bboxes too + std::vector<Geom::Rect> vecUp; + std::vector<Geom::Rect> vecDown; + if (consider_y && _bboxes_up->size() > 0) { + if (_findSidewaysSnaps(*bbox_to_snap, _bboxes_up->begin(), _bboxes_up->end(), vecUp, equal_dist, getSnapperTolerance(), &DistributionSnapper::distUp)) { + auto first_dist = distUp(*bbox_to_snap, vecUp.front()); + Geom::Coord offset = first_dist - equal_dist; + Geom::Point target = bbox_to_snap->midpoint() - Geom::Point(0, offset); + + // translate the source bbox to the snap position + Geom::Affine translation = Geom::Translate(target - bbox_to_snap->midpoint()); + Geom::Rect bbox = *bbox_to_snap * translation; + std::reverse(vecUp.begin(), vecUp.end()); + vecUp.push_back(bbox); + + _correctSelectionBBox(target, p.getPoint(), *bbox_to_snap); + + if (_bboxes_down->size() > 0) { + first_dist = distDown(bbox, _bboxes_down->front()); + Geom::Coord down_dist; + vecDown.clear(); + if (_findSidewaysSnaps(*bbox_to_snap, _bboxes_down->begin(), _bboxes_down->end(), vecDown, down_dist, + getSnapperTolerance(), &DistributionSnapper::distDown)) { + if (abs(down_dist - equal_dist) < 1e-4) { + vecUp.insert(vecUp.end(), vecDown.begin(), vecDown.end()); + } + + } else if (abs(first_dist - equal_dist) < 1e-4) { + vecUp.insert(vecUp.end(), vecDown.front()); + } + } + + dist_y = abs(offset); + sy = SnappedPoint(target, vecUp, bbox, equal_dist, p.getSourceType(), p.getSourceNum(), SNAPTARGET_DISTRIBUTION_UP, dist_y, getSnapperTolerance(), getSnapperAlwaysSnap(), false, true); + snap_y = true; + } + } + + // 2. if no snaps on top, look Down + // if there is a snap then add bottom bboxes and look Up, if there is a snap above then + // add those bboxes too + if (consider_y && !snap_y && _bboxes_down->size() > 0) { + vecDown.clear(); + if (_findSidewaysSnaps(*bbox_to_snap, _bboxes_down->begin(), _bboxes_down->end(), vecDown, equal_dist, getSnapperTolerance(), &DistributionSnapper::distDown)) { + auto first_dist = distDown(*bbox_to_snap, vecDown.front()); + Geom::Coord offset = first_dist - equal_dist; + Geom::Point target = bbox_to_snap->midpoint() + Geom::Point(0, offset); + + // translate the source bbox to the snap position + Geom::Affine translation = Geom::Translate(target - bbox_to_snap->midpoint()); + Geom::Rect bbox = *bbox_to_snap * translation; + vecDown.insert(vecDown.begin(), bbox); + + _correctSelectionBBox(target, p.getPoint(), *bbox_to_snap); + + if (_bboxes_up->size() > 0) { + first_dist = distUp(bbox, _bboxes_up->front()); + Geom::Coord up_dist; + vecUp.clear(); + + if (_findSidewaysSnaps(*bbox_to_snap, _bboxes_up->begin(), _bboxes_up->end(), vecUp, up_dist, getSnapperTolerance(), &DistributionSnapper::distUp)) { + if (compare_double(up_dist, equal_dist)) { + std::reverse(vecUp.begin(), vecUp.end()); + vecDown.insert(vecDown.begin(), vecUp.begin(), vecUp.end()); + } + } else if (compare_double(first_dist, equal_dist)) { + vecDown.insert(vecDown.begin(), vecUp.front()); + } + } + + dist_y = abs(offset); + sy = SnappedPoint(target, vecDown, bbox, equal_dist, p.getSourceType(), p.getSourceNum(), SNAPTARGET_DISTRIBUTION_DOWN, dist_y, getSnapperTolerance(), getSnapperAlwaysSnap(), false, true); + snap_y = true; + } + } + + // 3. if no snap to right or left just add the center snap + if (consider_y && !snap_y && vecUp.size() > 0 && vecDown.size() > 0) { + auto y = Geom::Point((vecUp.front().max() + vecDown.front().min()) / 2).y(); + offset = abs(y - bbox_to_snap->midpoint().y()); + if (consider_y && offset < getSnapperTolerance()) { + Geom::Point target = Geom::Point(bbox_to_snap->midpoint().x(), y); + // translate the source bbox to the snap position + Geom::Affine translation = Geom::Translate(target - bbox_to_snap->midpoint()); + Geom::Rect bbox = *bbox_to_snap * translation; + std::vector<Geom::Rect> bboxes = {vecUp.front(), bbox, vecDown.front()}; + + _correctSelectionBBox(target, p.getPoint(), *bbox_to_snap); + + equal_dist = bbox.min().y() - vecUp.front().max().y(); + sy = SnappedPoint(target, bboxes, bbox, equal_dist, p.getSourceType(), p.getSourceNum(), SNAPTARGET_DISTRIBUTION_Y, offset, getSnapperTolerance(), getSnapperAlwaysSnap(), false, true); + snap_y = true; + } + } + + if (snap_x && snap_y) { + Geom::Point target = Geom::Point(sx.getPoint().x(), sy.getPoint().y()); + Geom::Affine translation = Geom::Translate(target - bbox_to_snap->midpoint()); + Geom::Rect bbox = *bbox_to_snap * translation; + std::vector<Geom::Rect> bboxes_x = sx.getBBoxes(); + std::vector<Geom::Rect> bboxes_y = sy.getBBoxes(); + + // Do not need to correct here, already did that earlier for each direction separately + //_correctSelectionBBox(target, p.getPoint(), *bbox_to_snap); + auto si = SnappedPoint(target, bboxes_x, bboxes_y, bbox, sx.getDistributionDistance(), sy.getDistributionDistance(), p.getSourceType(), p.getSourceNum(), SNAPTARGET_DISTRIBUTION_XY, offset, getSnapperTolerance(), getSnapperAlwaysSnap(), false, true); + isr.points.push_back(si); + return; + } + + if (snap_x) { + isr.points.push_back(sx); + } + + if (snap_y) { + isr.points.push_back(sy); + } +} + +void Inkscape::DistributionSnapper::_correctSelectionBBox(Geom::Point &target, + Geom::Point const &p, + Geom::Rect const &bbox_to_snap) const +{ + if (_snapmanager->_desktop->selection->size() > 1) { + auto correction = bbox_to_snap.midpoint() - p; + target -= correction; + } +} + +void Inkscape::DistributionSnapper::freeSnap(IntermSnapResults &isr, + Inkscape::SnapCandidatePoint const &p, + Geom::OptRect const &bbox_to_snap, + std::vector<SPObject const *> const *it, + std::vector<SnapCandidatePoint> *unselected_nodes) const +{ + if (bbox_to_snap.empty()) + return; + + if (!(p.getSourceType() & SNAPSOURCE_BBOX_CATEGORY)) { + return; + } + + // toggle checks + if (!_snap_enabled || !_snapmanager->snapprefs.isTargetSnappable(SNAPTARGET_DISTRIBUTION_CATEGORY)) + return; + + if (p.getSourceNum() <= 0) { + Geom::Rect const local_bbox_to_snap = bbox_to_snap ? *bbox_to_snap : Geom::Rect(p.getPoint(), p.getPoint()); + _snapmanager->_findCandidates(_snapmanager->getDocument()->getRoot(), it, local_bbox_to_snap, false, Geom::identity()); + } + + _snapEquidistantPoints(isr, p, bbox_to_snap, unselected_nodes); +} + +void Inkscape::DistributionSnapper::constrainedSnap(IntermSnapResults &isr, + Inkscape::SnapCandidatePoint const &p, + Geom::OptRect const &bbox_to_snap, + SnapConstraint const &c, + std::vector<SPObject const *> const *it, + std::vector<SnapCandidatePoint> *unselected_nodes) const +{ + if (bbox_to_snap.empty()) + return; + + // toggle checks + if (!_snap_enabled || !_snapmanager->snapprefs.isTargetSnappable(SNAPTARGET_DISTRIBUTION_CATEGORY)) + return; + + // project the mouse pointer onto the constraint. Only the projected point will be considered for snapping + Geom::Point pp = c.projection(p.getPoint()); + + if (p.getSourceNum() <= 0) { + Geom::Rect const local_bbox_to_snap = bbox_to_snap ? *bbox_to_snap : Geom::Rect(p.getPoint(), p.getPoint()); + _snapmanager->_findCandidates(_snapmanager->getDocument()->getRoot(), it, local_bbox_to_snap, false, Geom::identity()); + } + + _snapEquidistantPoints(isr, p, bbox_to_snap, unselected_nodes, c, pp); +} + +bool Inkscape::DistributionSnapper::ThisSnapperMightSnap() const +{ + return true; +} + +bool Inkscape::DistributionSnapper::getSnapperAlwaysSnap() const +{ + // TODO: Replace this threshold of 10000 by a constant; see also tolerance-slider.cpp + return _snapmanager->snapprefs.getDistributionTolerance() == 10000; +} + +Geom::Coord Inkscape::DistributionSnapper::getSnapperTolerance() const +{ + SPDesktop const *dt = _snapmanager->getDesktop(); + double const zoom = dt ? dt->current_zoom() : 1; + return _snapmanager->snapprefs.getDistributionTolerance() / zoom; +} + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |