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diff --git a/src/snap.cpp b/src/snap.cpp
index 9e41603def439c24d21feca5763dabdc80a54c19..3dda92ecbcd73504c982a36737f9205cdc57a693 100644 (file)
--- a/src/snap.cpp
+++ b/src/snap.cpp
* Frank Felfe <innerspace@iname.com>
* Carl Hetherington <inkscape@carlh.net>
*
+ * Copyright (C) 2006-2007 Johan Engelen <johan@shouraizou.nl>
* Copyright (C) 1999-2002 Authors
*
* Released under GNU GPL, read the file 'COPYING' for more information
#include <libnr/nr-scale-ops.h>
#include <libnr/nr-values.h>
+#include "display/canvas-grid.h"
+
+#include "inkscape.h"
+#include "desktop.h"
+
/**
* Construct a SnapManager for a SPNamedView.
*
* \param v `Owning' SPNamedView.
*/
-SnapManager::SnapManager(SPNamedView const *v) : grid(v, 0), guide(v, 0), object(v, 0)
+SnapManager::SnapManager(SPNamedView const *v) :
+ guide(v, 0),
+ object(v, 0),
+ _named_view(v)
{
}
@@ -35,13 +44,36 @@ SnapManager::SnapManager(SPNamedView const *v) : grid(v, 0), guide(v, 0), object
/**
* \return List of snappers that we use.
*/
-
-SnapManager::SnapperList SnapManager::getSnappers() const
+SnapManager::SnapperList
+SnapManager::getSnappers() const
{
SnapManager::SnapperList s;
- s.push_back(&grid);
s.push_back(&guide);
s.push_back(&object);
+
+ SnapManager::SnapperList gs = getGridSnappers();
+ s.splice(s.begin(), gs);
+
+ return s;
+}
+
+/**
+ * \return List of gridsnappers that we use.
+ */
+SnapManager::SnapperList
+SnapManager::getGridSnappers() const
+{
+ SnapperList s;
+
+ //FIXME: this code should actually do this: add new grid snappers that are active for this desktop. now it just adds all gridsnappers
+ SPDesktop* desktop = SP_ACTIVE_DESKTOP;
+ if (desktop && desktop->gridsEnabled()) {
+ for ( GSList const *l = _named_view->grids; l != NULL; l = l->next) {
+ Inkscape::CanvasGrid *grid = (Inkscape::CanvasGrid*) l->data;
+ s.push_back(grid->snapper);
+ }
+ }
+
return s;
}
* \return true if one of the snappers will try to snap something.
*/
-bool SnapManager::willSnapSomething() const
+bool SnapManager::SomeSnapperMightSnap() const
{
SnapperList const s = getSnappers();
SnapperList::const_iterator i = s.begin();
- while (i != s.end() && (*i)->willSnapSomething() == false) {
+ while (i != s.end() && (*i)->ThisSnapperMightSnap() == false) {
i++;
}
+
return (i != s.end());
}
Inkscape::SnappedPoint SnapManager::freeSnap(Inkscape::Snapper::PointType t,
NR::Point const &p,
std::list<SPItem const *> const &it) const
+{
+ SnapperList const snappers = getSnappers();
+
+ return freeSnap(t, p, it, snappers);
+}
+
+/**
+ * Try to snap a point to any of the specified snappers.
+ *
+ * \param t Type of point.
+ * \param p Point.
+ * \param it List of items to ignore when snapping.
+ * \param snappers List of snappers to try to snap to
+ * \return Snapped point.
+ */
+
+Inkscape::SnappedPoint SnapManager::freeSnap(Inkscape::Snapper::PointType t,
+ NR::Point const &p,
+ std::list<SPItem const *> const &it,
+ SnapperList const &snappers) const
{
Inkscape::SnappedPoint r(p, NR_HUGE);
- SnapperList const snappers = getSnappers();
for (SnapperList::const_iterator i = snappers.begin(); i != snappers.end(); i++) {
Inkscape::SnappedPoint const s = (*i)->freeSnap(t, p, it);
if (s.getDistance() < r.getDistance()) {
return r;
}
+/**
+ * Try to snap a point to any of the specified snappers. Snap always, ignoring the snap-distance
+ *
+ * \param t Type of point.
+ * \param p Point.
+ * \param it Item to ignore when snapping.
+ * \param snappers List of snappers to try to snap to
+ * \return Snapped point.
+ */
+
+Inkscape::SnappedPoint
+SnapManager::freeSnapAlways( Inkscape::Snapper::PointType t,
+ NR::Point const &p,
+ SPItem const *it,
+ SnapperList &snappers )
+{
+ std::list<SPItem const *> lit;
+ lit.push_back(it);
+ return freeSnapAlways(t, p, lit, snappers);
+}
+
+/**
+ * Try to snap a point to any of the specified snappers. Snap always, ignoring the snap-distance
+ *
+ * \param t Type of point.
+ * \param p Point.
+ * \param it List of items to ignore when snapping.
+ * \param snappers List of snappers to try to snap to
+ * \return Snapped point.
+ */
+
+Inkscape::SnappedPoint
+SnapManager::freeSnapAlways( Inkscape::Snapper::PointType t,
+ NR::Point const &p,
+ std::list<SPItem const *> const &it,
+ SnapperList &snappers )
+{
+ Inkscape::SnappedPoint r(p, NR_HUGE);
+
+ for (SnapperList::iterator i = snappers.begin(); i != snappers.end(); i++) {
+ gdouble const curr_gridsnap = (*i)->getDistance();
+ const_cast<Inkscape::Snapper*> (*i)->setDistance(NR_HUGE);
+ Inkscape::SnappedPoint const s = (*i)->freeSnap(t, p, it);
+ const_cast<Inkscape::Snapper*> (*i)->setDistance(curr_gridsnap);
+
+ if (s.getDistance() < r.getDistance()) {
+ r = s;
+ }
+ }
+
+ return r;
+}
+
+
/**
* Try to snap a point to any interested snappers. A snap will only occur along
*/
/* Quick check to see if we have any snappers that are enabled */
- if (willSnapSomething() == false) {
+ if (SomeSnapperMightSnap() == false) {
return std::make_pair(transformation, false);
}
/* The current best transformation */
NR::Point best_transformation = transformation;
-
+
/* The current best metric for the best transformation; lower is better, NR_HUGE
** means that we haven't snapped anything.
*/
default:
g_assert_not_reached();
}
-
+
/* Snap it */
Inkscape::SnappedPoint const snapped = constrained ?
constrainedSnap(type, transformed, constraint, ignore) : freeSnap(type, transformed, ignore);
}
}
}
-
- return std::make_pair(best_transformation, best_metric < NR_HUGE);
+
+ // Using " < 1e6" instead of " < NR::HUGE" for catching some rounding errors
+ // These rounding errors might be caused by NRRects, see bug #1584301
+ return std::make_pair(best_transformation, best_metric < 1e6);
}