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| author | MenTaLguY <mental@rydia.net> | 2006-01-16 02:36:01 +0000 |
|---|---|---|
| committer | mental <mental@users.sourceforge.net> | 2006-01-16 02:36:01 +0000 |
| commit | 179fa413b047bede6e32109e2ce82437c5fb8d34 (patch) | |
| tree | a5a6ac2c1708bd02288fbd8edb2ff500ff2e0916 /src/nodepath.cpp | |
| download | inkscape-179fa413b047bede6e32109e2ce82437c5fb8d34.tar.gz inkscape-179fa413b047bede6e32109e2ce82437c5fb8d34.zip | |
moving trunk for module inkscape
(bzr r1)
Diffstat (limited to 'src/nodepath.cpp')
| -rw-r--r-- | src/nodepath.cpp | 3675 |
1 files changed, 3675 insertions, 0 deletions
diff --git a/src/nodepath.cpp b/src/nodepath.cpp new file mode 100644 index 000000000..c28ca7b80 --- /dev/null +++ b/src/nodepath.cpp @@ -0,0 +1,3675 @@ +#define __SP_NODEPATH_C__ + +/** \file + * Path handler in node edit mode + * + * Authors: + * Lauris Kaplinski <lauris@kaplinski.com> + * bulia byak <buliabyak@users.sf.net> + * + * This code is in public domain + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <gdk/gdkkeysyms.h> +#include "display/curve.h" +#include "display/sp-ctrlline.h" +#include "display/sodipodi-ctrl.h" +#include <glibmm/i18n.h> +#include "libnr/n-art-bpath.h" +#include "helper/units.h" +#include "knot.h" +#include "inkscape.h" +#include "document.h" +#include "sp-namedview.h" +#include "desktop.h" +#include "desktop-handles.h" +#include "snap.h" +#include "message-stack.h" +#include "message-context.h" +#include "node-context.h" +#include "selection-chemistry.h" +#include "selection.h" +#include "xml/repr.h" +#include "prefs-utils.h" +#include "sp-metrics.h" +#include "sp-path.h" +#include <libnr/nr-matrix-ops.h> +#include "splivarot.h" +#include "svg/svg.h" + +class NR::Matrix; + +/// \todo +/// evil evil evil. FIXME: conflict of two different Path classes! +/// There is a conflict in the namespace between two classes named Path. +/// #include "sp-flowtext.h" +/// #include "sp-flowregion.h" + +#define SP_TYPE_FLOWREGION (sp_flowregion_get_type ()) +#define SP_IS_FLOWREGION(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SP_TYPE_FLOWREGION)) +GType sp_flowregion_get_type (void); +#define SP_TYPE_FLOWTEXT (sp_flowtext_get_type ()) +#define SP_IS_FLOWTEXT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), SP_TYPE_FLOWTEXT)) +GType sp_flowtext_get_type (void); +// end evil workaround + +#include "helper/stlport.h" + + +/// \todo fixme: Implement these via preferences */ + +#define NODE_FILL 0xbfbfbf00 +#define NODE_STROKE 0x000000ff +#define NODE_FILL_HI 0xff000000 +#define NODE_STROKE_HI 0x000000ff +#define NODE_FILL_SEL 0x0000ffff +#define NODE_STROKE_SEL 0x000000ff +#define NODE_FILL_SEL_HI 0xff000000 +#define NODE_STROKE_SEL_HI 0x000000ff +#define KNOT_FILL 0xffffffff +#define KNOT_STROKE 0x000000ff +#define KNOT_FILL_HI 0xff000000 +#define KNOT_STROKE_HI 0x000000ff + +static GMemChunk *nodechunk = NULL; + +/* Creation from object */ + +static NArtBpath *subpath_from_bpath(Inkscape::NodePath::Path *np, NArtBpath *b, gchar const *t); +static gchar *parse_nodetypes(gchar const *types, gint length); + +/* Object updating */ + +static void stamp_repr(Inkscape::NodePath::Path *np); +static SPCurve *create_curve(Inkscape::NodePath::Path *np); +static gchar *create_typestr(Inkscape::NodePath::Path *np); + +static void sp_node_ensure_ctrls(Inkscape::NodePath::Node *node); + +static void sp_nodepath_node_select(Inkscape::NodePath::Node *node, gboolean incremental, gboolean override); + +static void sp_node_set_selected(Inkscape::NodePath::Node *node, gboolean selected); + +/* Control knot placement, if node or other knot is moved */ + +static void sp_node_adjust_knot(Inkscape::NodePath::Node *node, gint which_adjust); +static void sp_node_adjust_knots(Inkscape::NodePath::Node *node); + +/* Knot event handlers */ + +static void node_clicked(SPKnot *knot, guint state, gpointer data); +static void node_grabbed(SPKnot *knot, guint state, gpointer data); +static void node_ungrabbed(SPKnot *knot, guint state, gpointer data); +static gboolean node_request(SPKnot *knot, NR::Point *p, guint state, gpointer data); +static void node_ctrl_clicked(SPKnot *knot, guint state, gpointer data); +static void node_ctrl_grabbed(SPKnot *knot, guint state, gpointer data); +static void node_ctrl_ungrabbed(SPKnot *knot, guint state, gpointer data); +static gboolean node_ctrl_request(SPKnot *knot, NR::Point *p, guint state, gpointer data); +static void node_ctrl_moved(SPKnot *knot, NR::Point *p, guint state, gpointer data); + +/* Constructors and destructors */ + +static Inkscape::NodePath::SubPath *sp_nodepath_subpath_new(Inkscape::NodePath::Path *nodepath); +static void sp_nodepath_subpath_destroy(Inkscape::NodePath::SubPath *subpath); +static void sp_nodepath_subpath_close(Inkscape::NodePath::SubPath *sp); +static void sp_nodepath_subpath_open(Inkscape::NodePath::SubPath *sp,Inkscape::NodePath::Node *n); +static Inkscape::NodePath::Node * sp_nodepath_node_new(Inkscape::NodePath::SubPath *sp,Inkscape::NodePath::Node *next,Inkscape::NodePath::NodeType type, NRPathcode code, + NR::Point *ppos, NR::Point *pos, NR::Point *npos); +static void sp_nodepath_node_destroy(Inkscape::NodePath::Node *node); + +/* Helpers */ + +static Inkscape::NodePath::NodeSide *sp_node_get_side(Inkscape::NodePath::Node *node, gint which); +static Inkscape::NodePath::NodeSide *sp_node_opposite_side(Inkscape::NodePath::Node *node,Inkscape::NodePath::NodeSide *me); +static NRPathcode sp_node_path_code_from_side(Inkscape::NodePath::Node *node,Inkscape::NodePath::NodeSide *me); + +// active_node indicates mouseover node +static Inkscape::NodePath::Node *active_node = NULL; + +/** + * \brief Creates new nodepath from item + */ +Inkscape::NodePath::Path *sp_nodepath_new(SPDesktop *desktop, SPItem *item) +{ + Inkscape::XML::Node *repr = SP_OBJECT(item)->repr; + + /** \todo + * FIXME: remove this. We don't want to edit paths inside flowtext. + * Instead we will build our flowtext with cloned paths, so that the + * real paths are outside the flowtext and thus editable as usual. + */ + if (SP_IS_FLOWTEXT(item)) { + for (SPObject *child = sp_object_first_child(SP_OBJECT(item)) ; child != NULL; child = SP_OBJECT_NEXT(child) ) { + if SP_IS_FLOWREGION(child) { + SPObject *grandchild = sp_object_first_child(SP_OBJECT(child)); + if (grandchild && SP_IS_PATH(grandchild)) { + item = SP_ITEM(grandchild); + break; + } + } + } + } + + if (!SP_IS_PATH(item)) + return NULL; + SPPath *path = SP_PATH(item); + SPCurve *curve = sp_shape_get_curve(SP_SHAPE(path)); + if (curve == NULL) + return NULL; + + NArtBpath *bpath = sp_curve_first_bpath(curve); + gint length = curve->end; + if (length == 0) + return NULL; // prevent crash for one-node paths + + gchar const *nodetypes = repr->attribute("sodipodi:nodetypes"); + gchar *typestr = parse_nodetypes(nodetypes, length); + + //Create new nodepath + Inkscape::NodePath::Path *np = g_new(Inkscape::NodePath::Path, 1); + if (!np) + return NULL; + + // Set defaults + np->desktop = desktop; + np->path = path; + np->subpaths = NULL; + np->selected = NULL; + np->nodeContext = NULL; //Let the context that makes this set it + + // we need to update item's transform from the repr here, + // because they may be out of sync when we respond + // to a change in repr by regenerating nodepath --bb + sp_object_read_attr(SP_OBJECT(item), "transform"); + + np->i2d = sp_item_i2d_affine(SP_ITEM(path)); + np->d2i = np->i2d.inverse(); + np->repr = repr; + + /* Now the bitchy part (lauris) */ + + NArtBpath *b = bpath; + + while (b->code != NR_END) { + b = subpath_from_bpath(np, b, typestr + (b - bpath)); + } + + g_free(typestr); + sp_curve_unref(curve); + + return np; +} + +/** + * Destroys nodepath's subpaths, then itself, also tell context about it. + */ +void sp_nodepath_destroy(Inkscape::NodePath::Path *np) { + + if (!np) //soft fail, like delete + return; + + while (np->subpaths) { + sp_nodepath_subpath_destroy((Inkscape::NodePath::SubPath *) np->subpaths->data); + } + + //Inform the context that made me, if any, that I am gone. + if (np->nodeContext) + np->nodeContext->nodepath = NULL; + + g_assert(!np->selected); + + np->desktop = NULL; + + g_free(np); +} + + +/** + * Return the node count of a given NodeSubPath. + */ +static gint sp_nodepath_subpath_get_node_count(Inkscape::NodePath::SubPath *subpath) +{ + if (!subpath) + return 0; + gint nodeCount = g_list_length(subpath->nodes); + return nodeCount; +} + +/** + * Return the node count of a given NodePath. + */ +static gint sp_nodepath_get_node_count(Inkscape::NodePath::Path *np) +{ + if (!np) + return 0; + gint nodeCount = 0; + for (GList *item = np->subpaths ; item ; item=item->next) { + Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *)item->data; + nodeCount += g_list_length(subpath->nodes); + } + return nodeCount; +} + + +/** + * Clean up a nodepath after editing. + * + * Currently we are deleting trivial subpaths. + */ +static void sp_nodepath_cleanup(Inkscape::NodePath::Path *nodepath) +{ + GList *badSubPaths = NULL; + + //Check all subpaths to be >=2 nodes + for (GList *l = nodepath->subpaths; l ; l=l->next) { + Inkscape::NodePath::SubPath *sp = (Inkscape::NodePath::SubPath *)l->data; + if (sp_nodepath_subpath_get_node_count(sp)<2) + badSubPaths = g_list_append(badSubPaths, sp); + } + + //Delete them. This second step is because sp_nodepath_subpath_destroy() + //also removes the subpath from nodepath->subpaths + for (GList *l = badSubPaths; l ; l=l->next) { + Inkscape::NodePath::SubPath *sp = (Inkscape::NodePath::SubPath *)l->data; + sp_nodepath_subpath_destroy(sp); + } + + g_list_free(badSubPaths); +} + + + +/** + * \brief Returns true if the argument nodepath and the d attribute in + * its repr do not match. + * + * This may happen if repr was changed in, e.g., XML editor or by undo. + * + * \todo + * UGLY HACK, think how we can eliminate it. + */ +gboolean nodepath_repr_d_changed(Inkscape::NodePath::Path *np, char const *newd) +{ + g_assert(np); + + SPCurve *curve = create_curve(np); + + gchar *svgpath = sp_svg_write_path(curve->bpath); + + char const *attr_d = ( newd + ? newd + : SP_OBJECT(np->path)->repr->attribute("d") ); + + gboolean ret; + if (attr_d && svgpath) + ret = strcmp(attr_d, svgpath); + else + ret = TRUE; + + g_free(svgpath); + sp_curve_unref(curve); + + return ret; +} + +/** + * \brief Returns true if the argument nodepath and the sodipodi:nodetypes + * attribute in its repr do not match. + * + * This may happen if repr was changed in, e.g., the XML editor or by undo. + */ +gboolean nodepath_repr_typestr_changed(Inkscape::NodePath::Path *np, char const *newtypestr) +{ + g_assert(np); + gchar *typestr = create_typestr(np); + char const *attr_typestr = ( newtypestr + ? newtypestr + : SP_OBJECT(np->path)->repr->attribute("sodipodi:nodetypes") ); + gboolean const ret = (attr_typestr && strcmp(attr_typestr, typestr)); + + g_free(typestr); + + return ret; +} + +/** + * Create new nodepath from b, make it subpath of np. + * \param t The node type. + * \todo Fixme: t should be a proper type, rather than gchar + */ +static NArtBpath *subpath_from_bpath(Inkscape::NodePath::Path *np, NArtBpath *b, gchar const *t) +{ + NR::Point ppos, pos, npos; + + g_assert((b->code == NR_MOVETO) || (b->code == NR_MOVETO_OPEN)); + + Inkscape::NodePath::SubPath *sp = sp_nodepath_subpath_new(np); + bool const closed = (b->code == NR_MOVETO); + + pos = NR::Point(b->x3, b->y3) * np->i2d; + if (b[1].code == NR_CURVETO) { + npos = NR::Point(b[1].x1, b[1].y1) * np->i2d; + } else { + npos = pos; + } + Inkscape::NodePath::Node *n; + n = sp_nodepath_node_new(sp, NULL, (Inkscape::NodePath::NodeType) *t, NR_MOVETO, &pos, &pos, &npos); + g_assert(sp->first == n); + g_assert(sp->last == n); + + b++; + t++; + while ((b->code == NR_CURVETO) || (b->code == NR_LINETO)) { + pos = NR::Point(b->x3, b->y3) * np->i2d; + if (b->code == NR_CURVETO) { + ppos = NR::Point(b->x2, b->y2) * np->i2d; + } else { + ppos = pos; + } + if (b[1].code == NR_CURVETO) { + npos = NR::Point(b[1].x1, b[1].y1) * np->i2d; + } else { + npos = pos; + } + n = sp_nodepath_node_new(sp, NULL, (Inkscape::NodePath::NodeType)*t, b->code, &ppos, &pos, &npos); + b++; + t++; + } + + if (closed) sp_nodepath_subpath_close(sp); + + return b; +} + +/** + * Convert from sodipodi:nodetypes to new style type string. + */ +static gchar *parse_nodetypes(gchar const *types, gint length) +{ + g_assert(length > 0); + + gchar *typestr = g_new(gchar, length + 1); + + gint pos = 0; + + if (types) { + for (gint i = 0; types[i] && ( i < length ); i++) { + while ((types[i] > '\0') && (types[i] <= ' ')) i++; + if (types[i] != '\0') { + switch (types[i]) { + case 's': + typestr[pos++] =Inkscape::NodePath::NODE_SMOOTH; + break; + case 'z': + typestr[pos++] =Inkscape::NodePath::NODE_SYMM; + break; + case 'c': + typestr[pos++] =Inkscape::NodePath::NODE_CUSP; + break; + default: + typestr[pos++] =Inkscape::NodePath::NODE_NONE; + break; + } + } + } + } + + while (pos < length) typestr[pos++] =Inkscape::NodePath::NODE_NONE; + + return typestr; +} + +/** + * Make curve out of path and associate it with it. + */ +static void update_object(Inkscape::NodePath::Path *np) +{ + g_assert(np); + + SPCurve *curve = create_curve(np); + + sp_shape_set_curve(SP_SHAPE(np->path), curve, TRUE); + + sp_curve_unref(curve); +} + +/** + * Update XML path node with data from path object. + */ +static void update_repr_internal(Inkscape::NodePath::Path *np) +{ + g_assert(np); + + Inkscape::XML::Node *repr = SP_OBJECT(np->path)->repr; + + SPCurve *curve = create_curve(np); + gchar *typestr = create_typestr(np); + gchar *svgpath = sp_svg_write_path(curve->bpath); + + repr->setAttribute("d", svgpath); + repr->setAttribute("sodipodi:nodetypes", typestr); + + g_free(svgpath); + g_free(typestr); + sp_curve_unref(curve); +} + +/** + * Update XML path node with data from path object, commit changes forever. + */ +static void update_repr(Inkscape::NodePath::Path *np) +{ + update_repr_internal(np); + sp_document_done(SP_DT_DOCUMENT(np->desktop)); +} + +/** + * Update XML path node with data from path object, commit changes with undo. + */ +static void update_repr_keyed(Inkscape::NodePath::Path *np, gchar const *key) +{ + update_repr_internal(np); + sp_document_maybe_done(SP_DT_DOCUMENT(np->desktop), key); +} + +/** + * Make duplicate of path, replace corresponding XML node in tree, commit. + */ +static void stamp_repr(Inkscape::NodePath::Path *np) +{ + g_assert(np); + + Inkscape::XML::Node *old_repr = SP_OBJECT(np->path)->repr; + Inkscape::XML::Node *new_repr = old_repr->duplicate(); + + // remember the position of the item + gint pos = old_repr->position(); + // remember parent + Inkscape::XML::Node *parent = sp_repr_parent(old_repr); + + SPCurve *curve = create_curve(np); + gchar *typestr = create_typestr(np); + + gchar *svgpath = sp_svg_write_path(curve->bpath); + + new_repr->setAttribute("d", svgpath); + new_repr->setAttribute("sodipodi:nodetypes", typestr); + + // add the new repr to the parent + parent->appendChild(new_repr); + // move to the saved position + new_repr->setPosition(pos > 0 ? pos : 0); + + sp_document_done(SP_DT_DOCUMENT(np->desktop)); + + Inkscape::GC::release(new_repr); + g_free(svgpath); + g_free(typestr); + sp_curve_unref(curve); +} + +/** + * Create curve from path. + */ +static SPCurve *create_curve(Inkscape::NodePath::Path *np) +{ + SPCurve *curve = sp_curve_new(); + + for (GList *spl = np->subpaths; spl != NULL; spl = spl->next) { + Inkscape::NodePath::SubPath *sp = (Inkscape::NodePath::SubPath *) spl->data; + sp_curve_moveto(curve, + sp->first->pos * np->d2i); + Inkscape::NodePath::Node *n = sp->first->n.other; + while (n) { + NR::Point const end_pt = n->pos * np->d2i; + switch (n->code) { + case NR_LINETO: + sp_curve_lineto(curve, end_pt); + break; + case NR_CURVETO: + sp_curve_curveto(curve, + n->p.other->n.pos * np->d2i, + n->p.pos * np->d2i, + end_pt); + break; + default: + g_assert_not_reached(); + break; + } + if (n != sp->last) { + n = n->n.other; + } else { + n = NULL; + } + } + if (sp->closed) { + sp_curve_closepath(curve); + } + } + + return curve; +} + +/** + * Convert path type string to sodipodi:nodetypes style. + */ +static gchar *create_typestr(Inkscape::NodePath::Path *np) +{ + gchar *typestr = g_new(gchar, 32); + gint len = 32; + gint pos = 0; + + for (GList *spl = np->subpaths; spl != NULL; spl = spl->next) { + Inkscape::NodePath::SubPath *sp = (Inkscape::NodePath::SubPath *) spl->data; + + if (pos >= len) { + typestr = g_renew(gchar, typestr, len + 32); + len += 32; + } + + typestr[pos++] = 'c'; + + Inkscape::NodePath::Node *n; + n = sp->first->n.other; + while (n) { + gchar code; + + switch (n->type) { + case Inkscape::NodePath::NODE_CUSP: + code = 'c'; + break; + case Inkscape::NodePath::NODE_SMOOTH: + code = 's'; + break; + case Inkscape::NodePath::NODE_SYMM: + code = 'z'; + break; + default: + g_assert_not_reached(); + code = '\0'; + break; + } + + if (pos >= len) { + typestr = g_renew(gchar, typestr, len + 32); + len += 32; + } + + typestr[pos++] = code; + + if (n != sp->last) { + n = n->n.other; + } else { + n = NULL; + } + } + } + + if (pos >= len) { + typestr = g_renew(gchar, typestr, len + 1); + len += 1; + } + + typestr[pos++] = '\0'; + + return typestr; +} + +/** + * Returns current path in context. + */ +static Inkscape::NodePath::Path *sp_nodepath_current() +{ + if (!SP_ACTIVE_DESKTOP) { + return NULL; + } + + SPEventContext *event_context = (SP_ACTIVE_DESKTOP)->event_context; + + if (!SP_IS_NODE_CONTEXT(event_context)) { + return NULL; + } + + return SP_NODE_CONTEXT(event_context)->nodepath; +} + + + +/** + \brief Fills node and control positions for three nodes, splitting line + marked by end at distance t. + */ +static void sp_nodepath_line_midpoint(Inkscape::NodePath::Node *new_path,Inkscape::NodePath::Node *end, gdouble t) +{ + g_assert(new_path != NULL); + g_assert(end != NULL); + + g_assert(end->p.other == new_path); + Inkscape::NodePath::Node *start = new_path->p.other; + g_assert(start); + + if (end->code == NR_LINETO) { + new_path->type =Inkscape::NodePath::NODE_CUSP; + new_path->code = NR_LINETO; + new_path->pos = (t * start->pos + (1 - t) * end->pos); + } else { + new_path->type =Inkscape::NodePath::NODE_SMOOTH; + new_path->code = NR_CURVETO; + gdouble s = 1 - t; + for (int dim = 0; dim < 2; dim++) { + NR::Coord const f000 = start->pos[dim]; + NR::Coord const f001 = start->n.pos[dim]; + NR::Coord const f011 = end->p.pos[dim]; + NR::Coord const f111 = end->pos[dim]; + NR::Coord const f00t = s * f000 + t * f001; + NR::Coord const f01t = s * f001 + t * f011; + NR::Coord const f11t = s * f011 + t * f111; + NR::Coord const f0tt = s * f00t + t * f01t; + NR::Coord const f1tt = s * f01t + t * f11t; + NR::Coord const fttt = s * f0tt + t * f1tt; + start->n.pos[dim] = f00t; + new_path->p.pos[dim] = f0tt; + new_path->pos[dim] = fttt; + new_path->n.pos[dim] = f1tt; + end->p.pos[dim] = f11t; + } + } +} + +/** + * Adds new node on direct line between two nodes, activates handles of all + * three nodes. + */ +static Inkscape::NodePath::Node *sp_nodepath_line_add_node(Inkscape::NodePath::Node *end, gdouble t) +{ + g_assert(end); + g_assert(end->subpath); + g_assert(g_list_find(end->subpath->nodes, end)); + + Inkscape::NodePath::Node *start = end->p.other; + g_assert( start->n.other == end ); + Inkscape::NodePath::Node *newnode = sp_nodepath_node_new(end->subpath, + end, + Inkscape::NodePath::NODE_SMOOTH, + (NRPathcode)end->code, + &start->pos, &start->pos, &start->n.pos); + sp_nodepath_line_midpoint(newnode, end, t); + + sp_node_ensure_ctrls(start); + sp_node_ensure_ctrls(newnode); + sp_node_ensure_ctrls(end); + + return newnode; +} + +/** +\brief Break the path at the node: duplicate the argument node, start a new subpath with the duplicate, and copy all nodes after the argument node to it +*/ +static Inkscape::NodePath::Node *sp_nodepath_node_break(Inkscape::NodePath::Node *node) +{ + g_assert(node); + g_assert(node->subpath); + g_assert(g_list_find(node->subpath->nodes, node)); + + Inkscape::NodePath::SubPath *sp = node->subpath; + Inkscape::NodePath::Path *np = sp->nodepath; + + if (sp->closed) { + sp_nodepath_subpath_open(sp, node); + return sp->first; + } else { + // no break for end nodes + if (node == sp->first) return NULL; + if (node == sp->last ) return NULL; + + // create a new subpath + Inkscape::NodePath::SubPath *newsubpath = sp_nodepath_subpath_new(np); + + // duplicate the break node as start of the new subpath + Inkscape::NodePath::Node *newnode = sp_nodepath_node_new(newsubpath, NULL, (Inkscape::NodePath::NodeType)node->type, NR_MOVETO, &node->pos, &node->pos, &node->n.pos); + + while (node->n.other) { // copy the remaining nodes into the new subpath + Inkscape::NodePath::Node *n = node->n.other; + Inkscape::NodePath::Node *nn = sp_nodepath_node_new(newsubpath, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->code, &n->p.pos, &n->pos, &n->n.pos); + if (n->selected) { + sp_nodepath_node_select(nn, TRUE, TRUE); //preserve selection + } + sp_nodepath_node_destroy(n); // remove the point on the original subpath + } + + return newnode; + } +} + +/** + * Duplicate node and connect to neighbours. + */ +static Inkscape::NodePath::Node *sp_nodepath_node_duplicate(Inkscape::NodePath::Node *node) +{ + g_assert(node); + g_assert(node->subpath); + g_assert(g_list_find(node->subpath->nodes, node)); + + Inkscape::NodePath::SubPath *sp = node->subpath; + + NRPathcode code = (NRPathcode) node->code; + if (code == NR_MOVETO) { // if node is the endnode, + node->code = NR_LINETO; // new one is inserted before it, so change that to line + } + + Inkscape::NodePath::Node *newnode = sp_nodepath_node_new(sp, node, (Inkscape::NodePath::NodeType)node->type, code, &node->p.pos, &node->pos, &node->n.pos); + + if (!node->n.other || !node->p.other) // if node is an endnode, select it + return node; + else + return newnode; // otherwise select the newly created node +} + +static void sp_node_control_mirror_n_to_p(Inkscape::NodePath::Node *node) +{ + node->p.pos = (node->pos + (node->pos - node->n.pos)); +} + +static void sp_node_control_mirror_p_to_n(Inkscape::NodePath::Node *node) +{ + node->n.pos = (node->pos + (node->pos - node->p.pos)); +} + +/** + * Change line type at node, with side effects on neighbours. + */ +static void sp_nodepath_set_line_type(Inkscape::NodePath::Node *end, NRPathcode code) +{ + g_assert(end); + g_assert(end->subpath); + g_assert(end->p.other); + + if (end->code == static_cast< guint > ( code ) ) + return; + + Inkscape::NodePath::Node *start = end->p.other; + + end->code = code; + + if (code == NR_LINETO) { + if (start->code == NR_LINETO) start->type =Inkscape::NodePath::NODE_CUSP; + if (end->n.other) { + if (end->n.other->code == NR_LINETO) end->type =Inkscape::NodePath::NODE_CUSP; + } + sp_node_adjust_knot(start, -1); + sp_node_adjust_knot(end, 1); + } else { + NR::Point delta = end->pos - start->pos; + start->n.pos = start->pos + delta / 3; + end->p.pos = end->pos - delta / 3; + sp_node_adjust_knot(start, 1); + sp_node_adjust_knot(end, -1); + } + + sp_node_ensure_ctrls(start); + sp_node_ensure_ctrls(end); +} + +/** + * Change node type, and its handles accordingly. + */ +static Inkscape::NodePath::Node *sp_nodepath_set_node_type(Inkscape::NodePath::Node *node,Inkscape::NodePath::NodeType type) +{ + g_assert(node); + g_assert(node->subpath); + + if (type == static_cast<Inkscape::NodePath::NodeType>(static_cast< guint >(node->type) ) ) + return node; + + if ((node->p.other != NULL) && (node->n.other != NULL)) { + if ((node->code == NR_LINETO) && (node->n.other->code == NR_LINETO)) { + type =Inkscape::NodePath::NODE_CUSP; + } + } + + node->type = type; + + if (node->type == Inkscape::NodePath::NODE_CUSP) { + g_object_set(G_OBJECT(node->knot), "shape", SP_KNOT_SHAPE_DIAMOND, "size", 9, NULL); + } else { + g_object_set(G_OBJECT(node->knot), "shape", SP_KNOT_SHAPE_SQUARE, "size", 7, NULL); + } + + sp_node_adjust_knots(node); + + sp_nodepath_update_statusbar(node->subpath->nodepath); + + return node; +} + +/** + * Same as sp_nodepath_set_node_type(), but also converts, if necessary, + * adjacent segments from lines to curves. +*/ +void sp_nodepath_convert_node_type(Inkscape::NodePath::Node *node, Inkscape::NodePath::NodeType type) +{ + if (type == Inkscape::NodePath::NODE_SYMM || type == Inkscape::NodePath::NODE_SMOOTH) { + if ((node->p.other != NULL) && (node->code == NR_LINETO || node->pos == node->p.pos)) { + // convert adjacent segment BEFORE to curve + node->code = NR_CURVETO; + NR::Point delta; + if (node->n.other != NULL) + delta = node->n.other->pos - node->p.other->pos; + else + delta = node->pos - node->p.other->pos; + node->p.pos = node->pos - delta / 4; + sp_node_ensure_ctrls(node); + } + + if ((node->n.other != NULL) && (node->n.other->code == NR_LINETO || node->pos == node->n.pos)) { + // convert adjacent segment AFTER to curve + node->n.other->code = NR_CURVETO; + NR::Point delta; + if (node->p.other != NULL) + delta = node->p.other->pos - node->n.other->pos; + else + delta = node->pos - node->n.other->pos; + node->n.pos = node->pos - delta / 4; + sp_node_ensure_ctrls(node); + } + } + + sp_nodepath_set_node_type (node, type); +} + +/** + * Move node to point, and adjust its and neighbouring handles. + */ +void sp_node_moveto(Inkscape::NodePath::Node *node, NR::Point p) +{ + NR::Point delta = p - node->pos; + node->pos = p; + + node->p.pos += delta; + node->n.pos += delta; + + if (node->p.other) { + if (node->code == NR_LINETO) { + sp_node_adjust_knot(node, 1); + sp_node_adjust_knot(node->p.other, -1); + } + } + if (node->n.other) { + if (node->n.other->code == NR_LINETO) { + sp_node_adjust_knot(node, -1); + sp_node_adjust_knot(node->n.other, 1); + } + } + + sp_node_ensure_ctrls(node); +} + +/** + * Call sp_node_moveto() for node selection and handle possible snapping. + */ +static void sp_nodepath_selected_nodes_move(Inkscape::NodePath::Path *nodepath, NR::Coord dx, NR::Coord dy, + bool const snap = true) +{ + NR::Coord best[2] = { NR_HUGE, NR_HUGE }; + NR::Point delta(dx, dy); + NR::Point best_pt = delta; + + if (snap) { + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + NR::Point p = n->pos + delta; + for (int dim = 0; dim < 2; dim++) { + NR::Coord dist = namedview_dim_snap(nodepath->desktop->namedview, + Inkscape::Snapper::SNAP_POINT, p, + NR::Dim2(dim), nodepath->path); + if (dist < best[dim]) { + best[dim] = dist; + best_pt[dim] = p[dim] - n->pos[dim]; + } + } + } + } + + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + sp_node_moveto(n, n->pos + best_pt); + } + + update_object(nodepath); +} + +/** + * Move node selection to point, adjust its and neighbouring handles, + * handle possible snapping, and commit the change with possible undo. + */ +void +sp_node_selected_move(gdouble dx, gdouble dy) +{ + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) return; + + sp_nodepath_selected_nodes_move(nodepath, dx, dy, false); + + if (dx == 0) { + update_repr_keyed(nodepath, "node:move:vertical"); + } else if (dy == 0) { + update_repr_keyed(nodepath, "node:move:horizontal"); + } else { + update_repr(nodepath); + } +} + +/** + * Move node selection off screen and commit the change. + */ +void +sp_node_selected_move_screen(gdouble dx, gdouble dy) +{ + // borrowed from sp_selection_move_screen in selection-chemistry.c + // we find out the current zoom factor and divide deltas by it + SPDesktop *desktop = SP_ACTIVE_DESKTOP; + + gdouble zoom = desktop->current_zoom(); + gdouble zdx = dx / zoom; + gdouble zdy = dy / zoom; + + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) return; + + sp_nodepath_selected_nodes_move(nodepath, zdx, zdy, false); + + if (dx == 0) { + update_repr_keyed(nodepath, "node:move:vertical"); + } else if (dy == 0) { + update_repr_keyed(nodepath, "node:move:horizontal"); + } else { + update_repr(nodepath); + } +} + +/** + * Ensure knot on side of node is visible/invisible. + */ +static void sp_node_ensure_knot(Inkscape::NodePath::Node *node, gint which, gboolean show_knot) +{ + g_assert(node != NULL); + + Inkscape::NodePath::NodeSide *side = sp_node_get_side(node, which); + NRPathcode code = sp_node_path_code_from_side(node, side); + + show_knot = show_knot && (code == NR_CURVETO) && (NR::L2(side->pos - node->pos) > 1e-6); + + if (show_knot) { + if (!SP_KNOT_IS_VISIBLE(side->knot)) { + sp_knot_show(side->knot); + } + + sp_knot_set_position(side->knot, &side->pos, 0); + sp_canvas_item_show(side->line); + + } else { + if (SP_KNOT_IS_VISIBLE(side->knot)) { + sp_knot_hide(side->knot); + } + sp_canvas_item_hide(side->line); + } +} + +/** + * Ensure handles on node and neighbours of node are visible if selected. + */ +static void sp_node_ensure_ctrls(Inkscape::NodePath::Node *node) +{ + g_assert(node != NULL); + + if (!SP_KNOT_IS_VISIBLE(node->knot)) { + sp_knot_show(node->knot); + } + + sp_knot_set_position(node->knot, &node->pos, 0); + + gboolean show_knots = node->selected; + if (node->p.other != NULL) { + if (node->p.other->selected) show_knots = TRUE; + } + if (node->n.other != NULL) { + if (node->n.other->selected) show_knots = TRUE; + } + + sp_node_ensure_knot(node, -1, show_knots); + sp_node_ensure_knot(node, 1, show_knots); +} + +/** + * Call sp_node_ensure_ctrls() for all nodes on subpath. + */ +static void sp_nodepath_subpath_ensure_ctrls(Inkscape::NodePath::SubPath *subpath) +{ + g_assert(subpath != NULL); + + for (GList *l = subpath->nodes; l != NULL; l = l->next) { + sp_node_ensure_ctrls((Inkscape::NodePath::Node *) l->data); + } +} + +/** + * Call sp_nodepath_subpath_ensure_ctrls() for all subpaths of nodepath. + */ +static void sp_nodepath_ensure_ctrls(Inkscape::NodePath::Path *nodepath) +{ + g_assert(nodepath != NULL); + + for (GList *l = nodepath->subpaths; l != NULL; l = l->next) { + sp_nodepath_subpath_ensure_ctrls((Inkscape::NodePath::SubPath *) l->data); + } +} + +/** + * Adds all selected nodes in nodepath to list. + */ +void Inkscape::NodePath::Path::selection(std::list<Node *> &l) +{ + StlConv<Node *>::list(l, selected); +/// \todo this adds a copying, rework when the selection becomes a stl list +} + +/** + * Align selected nodes on the specified axis. + */ +void sp_nodepath_selected_align(Inkscape::NodePath::Path *nodepath, NR::Dim2 axis) +{ + if ( !nodepath || !nodepath->selected ) { // no nodepath, or no nodes selected + return; + } + + if ( !nodepath->selected->next ) { // only one node selected + return; + } + Inkscape::NodePath::Node *pNode = reinterpret_cast<Inkscape::NodePath::Node *>(nodepath->selected->data); + NR::Point dest(pNode->pos); + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + pNode = reinterpret_cast<Inkscape::NodePath::Node *>(l->data); + if (pNode) { + dest[axis] = pNode->pos[axis]; + sp_node_moveto(pNode, dest); + } + } + if (axis == NR::X) { + update_repr_keyed(nodepath, "node:move:vertical"); + } else { + update_repr_keyed(nodepath, "node:move:horizontal"); + } +} + +/// Helper struct. +struct NodeSort +{ + Inkscape::NodePath::Node *_node; + NR::Coord _coord; + /// \todo use vectorof pointers instead of calling copy ctor + NodeSort(Inkscape::NodePath::Node *node, NR::Dim2 axis) : + _node(node), _coord(node->pos[axis]) + {} + +}; + +static bool operator<(NodeSort const &a, NodeSort const &b) +{ + return (a._coord < b._coord); +} + +/** + * Distribute selected nodes on the specified axis. + */ +void sp_nodepath_selected_distribute(Inkscape::NodePath::Path *nodepath, NR::Dim2 axis) +{ + if ( !nodepath || !nodepath->selected ) { // no nodepath, or no nodes selected + return; + } + + if ( ! (nodepath->selected->next && nodepath->selected->next->next) ) { // less than 3 nodes selected + return; + } + + Inkscape::NodePath::Node *pNode = reinterpret_cast<Inkscape::NodePath::Node *>(nodepath->selected->data); + std::vector<NodeSort> sorted; + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + pNode = reinterpret_cast<Inkscape::NodePath::Node *>(l->data); + if (pNode) { + NodeSort n(pNode, axis); + sorted.push_back(n); + //dest[axis] = pNode->pos[axis]; + //sp_node_moveto(pNode, dest); + } + } + std::sort(sorted.begin(), sorted.end()); + unsigned int len = sorted.size(); + //overall bboxes span + float dist = (sorted.back()._coord - + sorted.front()._coord); + //new distance between each bbox + float step = (dist) / (len - 1); + float pos = sorted.front()._coord; + for ( std::vector<NodeSort> ::iterator it(sorted.begin()); + it < sorted.end(); + it ++ ) + { + NR::Point dest((*it)._node->pos); + dest[axis] = pos; + sp_node_moveto((*it)._node, dest); + pos += step; + } + + if (axis == NR::X) { + update_repr_keyed(nodepath, "node:move:horizontal"); + } else { + update_repr_keyed(nodepath, "node:move:vertical"); + } +} + + +/** + * Call sp_nodepath_line_add_node() for all selected segments. + */ +void +sp_node_selected_add_node(void) +{ + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) { + return; + } + + GList *nl = NULL; + + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *t = (Inkscape::NodePath::Node *) l->data; + g_assert(t->selected); + if (t->p.other && t->p.other->selected) { + nl = g_list_prepend(nl, t); + } + } + + while (nl) { + Inkscape::NodePath::Node *t = (Inkscape::NodePath::Node *) nl->data; + Inkscape::NodePath::Node *n = sp_nodepath_line_add_node(t, 0.5); + sp_nodepath_node_select(n, TRUE, FALSE); + nl = g_list_remove(nl, t); + } + + /** \todo fixme: adjust ? */ + sp_nodepath_ensure_ctrls(nodepath); + + update_repr(nodepath); + + sp_nodepath_update_statusbar(nodepath); +} + +/** + * Select segment nearest to point + */ +void +sp_nodepath_select_segment_near_point(SPItem * item, NR::Point p, bool toggle) +{ + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) { + return; + } + + Path::cut_position position = get_nearest_position_on_Path(item, p); + + //find segment to segment + Inkscape::NodePath::Node *e = sp_nodepath_get_node_by_index(position.piece); + + gboolean force = FALSE; + if (!(e->selected && e->p.other->selected)) { + force = TRUE; + } + sp_nodepath_node_select(e, (gboolean) toggle, force); + sp_nodepath_node_select(e->p.other, TRUE, force); + + sp_nodepath_ensure_ctrls(nodepath); + + sp_nodepath_update_statusbar(nodepath); +} + +/** + * Add a node nearest to point + */ +void +sp_nodepath_add_node_near_point(SPItem * item, NR::Point p) +{ + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) { + return; + } + + Path::cut_position position = get_nearest_position_on_Path(item, p); + + //find segment to split + Inkscape::NodePath::Node *e = sp_nodepath_get_node_by_index(position.piece); + + //don't know why but t seems to flip for lines + if (sp_node_path_code_from_side(e, sp_node_get_side(e, -1)) == NR_LINETO) { + position.t = 1.0 - position.t; + } + Inkscape::NodePath::Node *n = sp_nodepath_line_add_node(e, position.t); + sp_nodepath_node_select(n, FALSE, TRUE); + + /* fixme: adjust ? */ + sp_nodepath_ensure_ctrls(nodepath); + + update_repr(nodepath); + + sp_nodepath_update_statusbar(nodepath); +} + +/* + * Adjusts a segment so that t moves by a certain delta for dragging + * converts lines to curves + * + * method and idea borrowed from Simon Budig <simon@gimp.org> and the GIMP + * cf. app/vectors/gimpbezierstroke.c, gimp_bezier_stroke_point_move_relative() + */ +void +sp_nodepath_curve_drag(Inkscape::NodePath::Node * e, double t, NR::Point delta, char * key) +{ + /* feel good is an arbitrary parameter that distributes the delta between handles + * if t of the drag point is less than 1/6 distance form the endpoint only + * the corresponding hadle is adjusted. This matches the behavior in GIMP + */ + double feel_good; + if (t <= 1.0 / 6.0) + feel_good = 0; + else if (t <= 0.5) + feel_good = (pow((6 * t - 1) / 2.0, 3)) / 2; + else if (t <= 5.0 / 6.0) + feel_good = (1 - pow((6 * (1-t) - 1) / 2.0, 3)) / 2 + 0.5; + else + feel_good = 1; + + //if we're dragging a line convert it to a curve + if (sp_node_path_code_from_side(e, sp_node_get_side(e, -1))==NR_LINETO) { + sp_nodepath_set_line_type(e, NR_CURVETO); + } + + NR::Point offsetcoord0 = ((1-feel_good)/(3*t*(1-t)*(1-t))) * delta; + NR::Point offsetcoord1 = (feel_good/(3*t*t*(1-t))) * delta; + e->p.other->n.pos += offsetcoord0; + e->p.pos += offsetcoord1; + + // adjust controls of adjacent segments where necessary + sp_node_adjust_knot(e,1); + sp_node_adjust_knot(e->p.other,-1); + + sp_nodepath_ensure_ctrls(e->subpath->nodepath); + + update_repr_keyed(e->subpath->nodepath, key); + + sp_nodepath_update_statusbar(e->subpath->nodepath); +} + + +/** + * Call sp_nodepath_break() for all selected segments. + */ +void sp_node_selected_break() +{ + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) return; + + GList *temp = NULL; + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + Inkscape::NodePath::Node *nn = sp_nodepath_node_break(n); + if (nn == NULL) continue; // no break, no new node + temp = g_list_prepend(temp, nn); + } + + if (temp) { + sp_nodepath_deselect(nodepath); + } + for (GList *l = temp; l != NULL; l = l->next) { + sp_nodepath_node_select((Inkscape::NodePath::Node *) l->data, TRUE, TRUE); + } + + sp_nodepath_ensure_ctrls(nodepath); + + update_repr(nodepath); +} + +/** + * Duplicate the selected node(s). + */ +void sp_node_selected_duplicate() +{ + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) { + return; + } + + GList *temp = NULL; + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + Inkscape::NodePath::Node *nn = sp_nodepath_node_duplicate(n); + if (nn == NULL) continue; // could not duplicate + temp = g_list_prepend(temp, nn); + } + + if (temp) { + sp_nodepath_deselect(nodepath); + } + for (GList *l = temp; l != NULL; l = l->next) { + sp_nodepath_node_select((Inkscape::NodePath::Node *) l->data, TRUE, TRUE); + } + + sp_nodepath_ensure_ctrls(nodepath); + + update_repr(nodepath); +} + +/** + * Join two nodes by merging them into one. + */ +void sp_node_selected_join() +{ + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) return; // there's no nodepath when editing rects, stars, spirals or ellipses + + if (g_list_length(nodepath->selected) != 2) { + nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("To join, you must have <b>two endnodes</b> selected.")); + return; + } + + Inkscape::NodePath::Node *a = (Inkscape::NodePath::Node *) nodepath->selected->data; + Inkscape::NodePath::Node *b = (Inkscape::NodePath::Node *) nodepath->selected->next->data; + + g_assert(a != b); + g_assert(a->p.other || a->n.other); + g_assert(b->p.other || b->n.other); + + if (((a->subpath->closed) || (b->subpath->closed)) || (a->p.other && a->n.other) || (b->p.other && b->n.other)) { + nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("To join, you must have <b>two endnodes</b> selected.")); + return; + } + + /* a and b are endpoints */ + + NR::Point c = (a->pos + b->pos) / 2; + + if (a->subpath == b->subpath) { + Inkscape::NodePath::SubPath *sp = a->subpath; + sp_nodepath_subpath_close(sp); + + sp_nodepath_ensure_ctrls(sp->nodepath); + + update_repr(nodepath); + + return; + } + + /* a and b are separate subpaths */ + Inkscape::NodePath::SubPath *sa = a->subpath; + Inkscape::NodePath::SubPath *sb = b->subpath; + NR::Point p; + Inkscape::NodePath::Node *n; + NRPathcode code; + if (a == sa->first) { + p = sa->first->n.pos; + code = (NRPathcode)sa->first->n.other->code; + Inkscape::NodePath::SubPath *t = sp_nodepath_subpath_new(sa->nodepath); + n = sa->last; + sp_nodepath_node_new(t, NULL,Inkscape::NodePath::NODE_CUSP, NR_MOVETO, &n->n.pos, &n->pos, &n->p.pos); + n = n->p.other; + while (n) { + sp_nodepath_node_new(t, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->n.other->code, &n->n.pos, &n->pos, &n->p.pos); + n = n->p.other; + if (n == sa->first) n = NULL; + } + sp_nodepath_subpath_destroy(sa); + sa = t; + } else if (a == sa->last) { + p = sa->last->p.pos; + code = (NRPathcode)sa->last->code; + sp_nodepath_node_destroy(sa->last); + } else { + code = NR_END; + g_assert_not_reached(); + } + + if (b == sb->first) { + sp_nodepath_node_new(sa, NULL,Inkscape::NodePath::NODE_CUSP, code, &p, &c, &sb->first->n.pos); + for (n = sb->first->n.other; n != NULL; n = n->n.other) { + sp_nodepath_node_new(sa, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->code, &n->p.pos, &n->pos, &n->n.pos); + } + } else if (b == sb->last) { + sp_nodepath_node_new(sa, NULL,Inkscape::NodePath::NODE_CUSP, code, &p, &c, &sb->last->p.pos); + for (n = sb->last->p.other; n != NULL; n = n->p.other) { + sp_nodepath_node_new(sa, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->n.other->code, &n->n.pos, &n->pos, &n->p.pos); + } + } else { + g_assert_not_reached(); + } + /* and now destroy sb */ + + sp_nodepath_subpath_destroy(sb); + + sp_nodepath_ensure_ctrls(sa->nodepath); + + update_repr(nodepath); + + sp_nodepath_update_statusbar(nodepath); +} + +/** + * Join two nodes by adding a segment between them. + */ +void sp_node_selected_join_segment() +{ + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) return; // there's no nodepath when editing rects, stars, spirals or ellipses + + if (g_list_length(nodepath->selected) != 2) { + nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("To join, you must have <b>two endnodes</b> selected.")); + return; + } + + Inkscape::NodePath::Node *a = (Inkscape::NodePath::Node *) nodepath->selected->data; + Inkscape::NodePath::Node *b = (Inkscape::NodePath::Node *) nodepath->selected->next->data; + + g_assert(a != b); + g_assert(a->p.other || a->n.other); + g_assert(b->p.other || b->n.other); + + if (((a->subpath->closed) || (b->subpath->closed)) || (a->p.other && a->n.other) || (b->p.other && b->n.other)) { + nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, _("To join, you must have <b>two endnodes</b> selected.")); + return; + } + + if (a->subpath == b->subpath) { + Inkscape::NodePath::SubPath *sp = a->subpath; + + /*similar to sp_nodepath_subpath_close(sp), without the node destruction*/ + sp->closed = TRUE; + + sp->first->p.other = sp->last; + sp->last->n.other = sp->first; + + sp_node_control_mirror_p_to_n(sp->last); + sp_node_control_mirror_n_to_p(sp->first); + + sp->first->code = sp->last->code; + sp->first = sp->last; + + sp_nodepath_ensure_ctrls(sp->nodepath); + + update_repr(nodepath); + + return; + } + + /* a and b are separate subpaths */ + Inkscape::NodePath::SubPath *sa = a->subpath; + Inkscape::NodePath::SubPath *sb = b->subpath; + + Inkscape::NodePath::Node *n; + NR::Point p; + NRPathcode code; + if (a == sa->first) { + code = (NRPathcode) sa->first->n.other->code; + Inkscape::NodePath::SubPath *t = sp_nodepath_subpath_new(sa->nodepath); + n = sa->last; + sp_nodepath_node_new(t, NULL,Inkscape::NodePath::NODE_CUSP, NR_MOVETO, &n->n.pos, &n->pos, &n->p.pos); + for (n = n->p.other; n != NULL; n = n->p.other) { + sp_nodepath_node_new(t, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->n.other->code, &n->n.pos, &n->pos, &n->p.pos); + } + sp_nodepath_subpath_destroy(sa); + sa = t; + } else if (a == sa->last) { + code = (NRPathcode)sa->last->code; + } else { + code = NR_END; + g_assert_not_reached(); + } + + if (b == sb->first) { + n = sb->first; + sp_node_control_mirror_p_to_n(sa->last); + sp_nodepath_node_new(sa, NULL,Inkscape::NodePath::NODE_CUSP, code, &n->p.pos, &n->pos, &n->n.pos); + sp_node_control_mirror_n_to_p(sa->last); + for (n = n->n.other; n != NULL; n = n->n.other) { + sp_nodepath_node_new(sa, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->code, &n->p.pos, &n->pos, &n->n.pos); + } + } else if (b == sb->last) { + n = sb->last; + sp_node_control_mirror_p_to_n(sa->last); + sp_nodepath_node_new(sa, NULL,Inkscape::NodePath::NODE_CUSP, code, &p, &n->pos, &n->p.pos); + sp_node_control_mirror_n_to_p(sa->last); + for (n = n->p.other; n != NULL; n = n->p.other) { + sp_nodepath_node_new(sa, NULL, (Inkscape::NodePath::NodeType)n->type, (NRPathcode)n->n.other->code, &n->n.pos, &n->pos, &n->p.pos); + } + } else { + g_assert_not_reached(); + } + /* and now destroy sb */ + + sp_nodepath_subpath_destroy(sb); + + sp_nodepath_ensure_ctrls(sa->nodepath); + + update_repr(nodepath); +} + +/** + * Delete one or more selected nodes. + */ +void sp_node_selected_delete() +{ + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) return; + if (!nodepath->selected) return; + + /** \todo fixme: do it the right way */ + while (nodepath->selected) { + Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nodepath->selected->data; + sp_nodepath_node_destroy(node); + } + + + //clean up the nodepath (such as for trivial subpaths) + sp_nodepath_cleanup(nodepath); + + sp_nodepath_ensure_ctrls(nodepath); + + // if the entire nodepath is removed, delete the selected object. + if (nodepath->subpaths == NULL || + sp_nodepath_get_node_count(nodepath) < 2) { + SPDocument *document = SP_DT_DOCUMENT (nodepath->desktop); + sp_nodepath_destroy(nodepath); + sp_selection_delete(); + sp_document_done (document); + return; + } + + update_repr(nodepath); + + sp_nodepath_update_statusbar(nodepath); +} + +/** + * Delete one or more segments between two selected nodes. + * This is the code for 'split'. + */ +void +sp_node_selected_delete_segment(void) +{ + Inkscape::NodePath::Node *start, *end; //Start , end nodes. not inclusive + Inkscape::NodePath::Node *curr, *next; //Iterators + + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) return; // there's no nodepath when editing rects, stars, spirals or ellipses + + if (g_list_length(nodepath->selected) != 2) { + nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, + _("Select <b>two non-endpoint nodes</b> on a path between which to delete segments.")); + return; + } + + //Selected nodes, not inclusive + Inkscape::NodePath::Node *a = (Inkscape::NodePath::Node *) nodepath->selected->data; + Inkscape::NodePath::Node *b = (Inkscape::NodePath::Node *) nodepath->selected->next->data; + + if ( ( a==b) || //same node + (a->subpath != b->subpath ) || //not the same path + (!a->p.other || !a->n.other) || //one of a's sides does not have a segment + (!b->p.other || !b->n.other) ) //one of b's sides does not have a segment + { + nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, + _("Select <b>two non-endpoint nodes</b> on a path between which to delete segments.")); + return; + } + + //########################################### + //# BEGIN EDITS + //########################################### + //################################## + //# CLOSED PATH + //################################## + if (a->subpath->closed) { + + + gboolean reversed = FALSE; + + //Since we can go in a circle, we need to find the shorter distance. + // a->b or b->a + start = end = NULL; + int distance = 0; + int minDistance = 0; + for (curr = a->n.other ; curr && curr!=a ; curr=curr->n.other) { + if (curr==b) { + //printf("a to b:%d\n", distance); + start = a;//go from a to b + end = b; + minDistance = distance; + //printf("A to B :\n"); + break; + } + distance++; + } + + //try again, the other direction + distance = 0; + for (curr = b->n.other ; curr && curr!=b ; curr=curr->n.other) { + if (curr==a) { + //printf("b to a:%d\n", distance); + if (distance < minDistance) { + start = b; //we go from b to a + end = a; + reversed = TRUE; + //printf("B to A\n"); + } + break; + } + distance++; + } + + + //Copy everything from 'end' to 'start' to a new subpath + Inkscape::NodePath::SubPath *t = sp_nodepath_subpath_new(nodepath); + for (curr=end ; curr ; curr=curr->n.other) { + NRPathcode code = (NRPathcode) curr->code; + if (curr == end) + code = NR_MOVETO; + sp_nodepath_node_new(t, NULL, + (Inkscape::NodePath::NodeType)curr->type, code, + &curr->p.pos, &curr->pos, &curr->n.pos); + if (curr == start) + break; + } + sp_nodepath_subpath_destroy(a->subpath); + + + } + + + + //################################## + //# OPEN PATH + //################################## + else { + + //We need to get the direction of the list between A and B + //Can we walk from a to b? + start = end = NULL; + for (curr = a->n.other ; curr && curr!=a ; curr=curr->n.other) { + if (curr==b) { + start = a; //did it! we go from a to b + end = b; + //printf("A to B\n"); + break; + } + } + if (!start) {//didn't work? let's try the other direction + for (curr = b->n.other ; curr && curr!=b ; curr=curr->n.other) { + if (curr==a) { + start = b; //did it! we go from b to a + end = a; + //printf("B to A\n"); + break; + } + } + } + if (!start) { + nodepath->desktop->messageStack()->flash(Inkscape::ERROR_MESSAGE, + _("Cannot find path between nodes.")); + return; + } + + + + //Copy everything after 'end' to a new subpath + Inkscape::NodePath::SubPath *t = sp_nodepath_subpath_new(nodepath); + for (curr=end ; curr ; curr=curr->n.other) { + sp_nodepath_node_new(t, NULL, (Inkscape::NodePath::NodeType)curr->type, (NRPathcode)curr->code, + &curr->p.pos, &curr->pos, &curr->n.pos); + } + + //Now let us do our deletion. Since the tail has been saved, go all the way to the end of the list + for (curr = start->n.other ; curr ; curr=next) { + next = curr->n.other; + sp_nodepath_node_destroy(curr); + } + + } + //########################################### + //# END EDITS + //########################################### + + //clean up the nodepath (such as for trivial subpaths) + sp_nodepath_cleanup(nodepath); + + sp_nodepath_ensure_ctrls(nodepath); + + update_repr(nodepath); + + // if the entire nodepath is removed, delete the selected object. + if (nodepath->subpaths == NULL || + sp_nodepath_get_node_count(nodepath) < 2) { + sp_nodepath_destroy(nodepath); + sp_selection_delete(); + return; + } + + sp_nodepath_update_statusbar(nodepath); +} + +/** + * Call sp_nodepath_set_line() for all selected segments. + */ +void +sp_node_selected_set_line_type(NRPathcode code) +{ + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (nodepath == NULL) return; + + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + g_assert(n->selected); + if (n->p.other && n->p.other->selected) { + sp_nodepath_set_line_type(n, code); + } + } + + update_repr(nodepath); +} + +/** + * Call sp_nodepath_convert_node_type() for all selected nodes. + */ +void +sp_node_selected_set_type(Inkscape::NodePath::NodeType type) +{ + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (nodepath == NULL) return; + + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + sp_nodepath_convert_node_type((Inkscape::NodePath::Node *) l->data, type); + } + + update_repr(nodepath); +} + +/** + * Change select status of node, update its own and neighbour handles. + */ +static void sp_node_set_selected(Inkscape::NodePath::Node *node, gboolean selected) +{ + node->selected = selected; + + if (selected) { + g_object_set(G_OBJECT(node->knot), + "fill", NODE_FILL_SEL, + "fill_mouseover", NODE_FILL_SEL_HI, + "stroke", NODE_STROKE_SEL, + "stroke_mouseover", NODE_STROKE_SEL_HI, + "size", (node->type == Inkscape::NodePath::NODE_CUSP) ? 11 : 9, + NULL); + } else { + g_object_set(G_OBJECT(node->knot), + "fill", NODE_FILL, + "fill_mouseover", NODE_FILL_HI, + "stroke", NODE_STROKE, + "stroke_mouseover", NODE_STROKE_HI, + "size", (node->type == Inkscape::NodePath::NODE_CUSP) ? 9 : 7, + NULL); + } + + sp_node_ensure_ctrls(node); + if (node->n.other) sp_node_ensure_ctrls(node->n.other); + if (node->p.other) sp_node_ensure_ctrls(node->p.other); +} + +/** +\brief Select a node +\param node The node to select +\param incremental If true, add to selection, otherwise deselect others +\param override If true, always select this node, otherwise toggle selected status +*/ +static void sp_nodepath_node_select(Inkscape::NodePath::Node *node, gboolean incremental, gboolean override) +{ + Inkscape::NodePath::Path *nodepath = node->subpath->nodepath; + + if (incremental) { + if (override) { + if (!g_list_find(nodepath->selected, node)) { + nodepath->selected = g_list_append(nodepath->selected, node); + } + sp_node_set_selected(node, TRUE); + } else { // toggle + if (node->selected) { + g_assert(g_list_find(nodepath->selected, node)); + nodepath->selected = g_list_remove(nodepath->selected, node); + } else { + g_assert(!g_list_find(nodepath->selected, node)); + nodepath->selected = g_list_append(nodepath->selected, node); + } + sp_node_set_selected(node, !node->selected); + } + } else { + sp_nodepath_deselect(nodepath); + nodepath->selected = g_list_append(nodepath->selected, node); + sp_node_set_selected(node, TRUE); + } + + sp_nodepath_update_statusbar(nodepath); +} + + +/** +\brief Deselect all nodes in the nodepath +*/ +void +sp_nodepath_deselect(Inkscape::NodePath::Path *nodepath) +{ + if (!nodepath) return; // there's no nodepath when editing rects, stars, spirals or ellipses + + while (nodepath->selected) { + sp_node_set_selected((Inkscape::NodePath::Node *) nodepath->selected->data, FALSE); + nodepath->selected = g_list_remove(nodepath->selected, nodepath->selected->data); + } + sp_nodepath_update_statusbar(nodepath); +} + +/** +\brief Select or invert selection of all nodes in the nodepath +*/ +void +sp_nodepath_select_all(Inkscape::NodePath::Path *nodepath, bool invert) +{ + if (!nodepath) return; + + for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) { + Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data; + for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) { + Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data; + sp_nodepath_node_select(node, TRUE, invert? !node->selected : TRUE); + } + } +} + +/** + * If nothing selected, does the same as sp_nodepath_select_all(); + * otherwise selects/inverts all nodes in all subpaths that have selected nodes + * (i.e., similar to "select all in layer", with the "selected" subpaths + * being treated as "layers" in the path). + */ +void +sp_nodepath_select_all_from_subpath(Inkscape::NodePath::Path *nodepath, bool invert) +{ + if (!nodepath) return; + + if (g_list_length (nodepath->selected) == 0) { + sp_nodepath_select_all (nodepath, invert); + return; + } + + GList *copy = g_list_copy (nodepath->selected); // copy initial selection so that selecting in the loop does not affect us + GSList *subpaths = NULL; + + for (GList *l = copy; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + Inkscape::NodePath::SubPath *subpath = n->subpath; + if (!g_slist_find (subpaths, subpath)) + subpaths = g_slist_prepend (subpaths, subpath); + } + + for (GSList *sp = subpaths; sp != NULL; sp = sp->next) { + Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) sp->data; + for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) { + Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data; + sp_nodepath_node_select(node, TRUE, invert? !g_list_find(copy, node) : TRUE); + } + } + + g_slist_free (subpaths); + g_list_free (copy); +} + +/** + * \brief Select the node after the last selected; if none is selected, + * select the first within path. + */ +void sp_nodepath_select_next(Inkscape::NodePath::Path *nodepath) +{ + if (!nodepath) return; // there's no nodepath when editing rects, stars, spirals or ellipses + + Inkscape::NodePath::Node *last = NULL; + if (nodepath->selected) { + for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) { + Inkscape::NodePath::SubPath *subpath, *subpath_next; + subpath = (Inkscape::NodePath::SubPath *) spl->data; + for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) { + Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data; + if (node->selected) { + if (node->n.other == (Inkscape::NodePath::Node *) subpath->last) { + if (node->n.other == (Inkscape::NodePath::Node *) subpath->first) { // closed subpath + if (spl->next) { // there's a next subpath + subpath_next = (Inkscape::NodePath::SubPath *) spl->next->data; + last = subpath_next->first; + } else if (spl->prev) { // there's a previous subpath + last = NULL; // to be set later to the first node of first subpath + } else { + last = node->n.other; + } + } else { + last = node->n.other; + } + } else { + if (node->n.other) { + last = node->n.other; + } else { + if (spl->next) { // there's a next subpath + subpath_next = (Inkscape::NodePath::SubPath *) spl->next->data; + last = subpath_next->first; + } else if (spl->prev) { // there's a previous subpath + last = NULL; // to be set later to the first node of first subpath + } else { + last = (Inkscape::NodePath::Node *) subpath->first; + } + } + } + } + } + } + sp_nodepath_deselect(nodepath); + } + + if (last) { // there's at least one more node after selected + sp_nodepath_node_select((Inkscape::NodePath::Node *) last, TRUE, TRUE); + } else { // no more nodes, select the first one in first subpath + Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) nodepath->subpaths->data; + sp_nodepath_node_select((Inkscape::NodePath::Node *) subpath->first, TRUE, TRUE); + } +} + +/** + * \brief Select the node before the first selected; if none is selected, + * select the last within path + */ +void sp_nodepath_select_prev(Inkscape::NodePath::Path *nodepath) +{ + if (!nodepath) return; // there's no nodepath when editing rects, stars, spirals or ellipses + + Inkscape::NodePath::Node *last = NULL; + if (nodepath->selected) { + for (GList *spl = g_list_last(nodepath->subpaths); spl != NULL; spl = spl->prev) { + Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data; + for (GList *nl = g_list_last(subpath->nodes); nl != NULL; nl = nl->prev) { + Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data; + if (node->selected) { + if (node->p.other == (Inkscape::NodePath::Node *) subpath->first) { + if (node->p.other == (Inkscape::NodePath::Node *) subpath->last) { // closed subpath + if (spl->prev) { // there's a prev subpath + Inkscape::NodePath::SubPath *subpath_prev = (Inkscape::NodePath::SubPath *) spl->prev->data; + last = subpath_prev->last; + } else if (spl->next) { // there's a next subpath + last = NULL; // to be set later to the last node of last subpath + } else { + last = node->p.other; + } + } else { + last = node->p.other; + } + } else { + if (node->p.other) { + last = node->p.other; + } else { + if (spl->prev) { // there's a prev subpath + Inkscape::NodePath::SubPath *subpath_prev = (Inkscape::NodePath::SubPath *) spl->prev->data; + last = subpath_prev->last; + } else if (spl->next) { // there's a next subpath + last = NULL; // to be set later to the last node of last subpath + } else { + last = (Inkscape::NodePath::Node *) subpath->last; + } + } + } + } + } + } + sp_nodepath_deselect(nodepath); + } + + if (last) { // there's at least one more node before selected + sp_nodepath_node_select((Inkscape::NodePath::Node *) last, TRUE, TRUE); + } else { // no more nodes, select the last one in last subpath + GList *spl = g_list_last(nodepath->subpaths); + Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data; + sp_nodepath_node_select((Inkscape::NodePath::Node *) subpath->last, TRUE, TRUE); + } +} + +/** + * \brief Select all nodes that are within the rectangle. + */ +void sp_nodepath_select_rect(Inkscape::NodePath::Path *nodepath, NR::Rect const &b, gboolean incremental) +{ + if (!incremental) { + sp_nodepath_deselect(nodepath); + } + + for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) { + Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data; + for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) { + Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data; + + if (b.contains(node->pos)) { + sp_nodepath_node_select(node, TRUE, TRUE); + } + } + } +} + +/** +\brief Saves selected nodes in a nodepath into a list containing integer positions of all selected nodes +*/ +GList *save_nodepath_selection(Inkscape::NodePath::Path *nodepath) +{ + if (!nodepath->selected) { + return NULL; + } + + GList *r = NULL; + guint i = 0; + for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) { + Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data; + for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) { + Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data; + i++; + if (node->selected) { + r = g_list_append(r, GINT_TO_POINTER(i)); + } + } + } + return r; +} + +/** +\brief Restores selection by selecting nodes whose positions are in the list +*/ +void restore_nodepath_selection(Inkscape::NodePath::Path *nodepath, GList *r) +{ + sp_nodepath_deselect(nodepath); + + guint i = 0; + for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) { + Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data; + for (GList *nl = subpath->nodes; nl != NULL; nl = nl->next) { + Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node *) nl->data; + i++; + if (g_list_find(r, GINT_TO_POINTER(i))) { + sp_nodepath_node_select(node, TRUE, TRUE); + } + } + } + +} + +/** +\brief Adjusts control point according to node type and line code. +*/ +static void sp_node_adjust_knot(Inkscape::NodePath::Node *node, gint which_adjust) +{ + double len, otherlen, linelen; + + g_assert(node); + + Inkscape::NodePath::NodeSide *me = sp_node_get_side(node, which_adjust); + Inkscape::NodePath::NodeSide *other = sp_node_opposite_side(node, me); + + /** \todo fixme: */ + if (me->other == NULL) return; + if (other->other == NULL) return; + + /* I have line */ + + NRPathcode mecode, ocode; + if (which_adjust == 1) { + mecode = (NRPathcode)me->other->code; + ocode = (NRPathcode)node->code; + } else { + mecode = (NRPathcode)node->code; + ocode = (NRPathcode)other->other->code; + } + + if (mecode == NR_LINETO) return; + + /* I am curve */ + + if (other->other == NULL) return; + + /* Other has line */ + + if (node->type == Inkscape::NodePath::NODE_CUSP) return; + + NR::Point delta; + if (ocode == NR_LINETO) { + /* other is lineto, we are either smooth or symm */ + Inkscape::NodePath::Node *othernode = other->other; + len = NR::L2(me->pos - node->pos); + delta = node->pos - othernode->pos; + linelen = NR::L2(delta); + if (linelen < 1e-18) return; + + me->pos = node->pos + (len / linelen)*delta; + sp_knot_set_position(me->knot, &me->pos, 0); + + sp_node_ensure_ctrls(node); + return; + } + + if (node->type == Inkscape::NodePath::NODE_SYMM) { + + me->pos = 2 * node->pos - other->pos; + sp_knot_set_position(me->knot, &me->pos, 0); + + sp_node_ensure_ctrls(node); + return; + } + + /* We are smooth */ + + len = NR::L2(me->pos - node->pos); + delta = other->pos - node->pos; + otherlen = NR::L2(delta); + if (otherlen < 1e-18) return; + + me->pos = node->pos - (len / otherlen) * delta; + sp_knot_set_position(me->knot, &me->pos, 0); + + sp_node_ensure_ctrls(node); +} + +/** + \brief Adjusts control point according to node type and line code + */ +static void sp_node_adjust_knots(Inkscape::NodePath::Node *node) +{ + g_assert(node); + + if (node->type == Inkscape::NodePath::NODE_CUSP) return; + + /* we are either smooth or symm */ + + if (node->p.other == NULL) return; + + if (node->n.other == NULL) return; + + if (node->code == NR_LINETO) { + if (node->n.other->code == NR_LINETO) return; + sp_node_adjust_knot(node, 1); + sp_node_ensure_ctrls(node); + return; + } + + if (node->n.other->code == NR_LINETO) { + if (node->code == NR_LINETO) return; + sp_node_adjust_knot(node, -1); + sp_node_ensure_ctrls(node); + return; + } + + /* both are curves */ + + NR::Point const delta( node->n.pos - node->p.pos ); + + if (node->type == Inkscape::NodePath::NODE_SYMM) { + node->p.pos = node->pos - delta / 2; + node->n.pos = node->pos + delta / 2; + sp_node_ensure_ctrls(node); + return; + } + + /* We are smooth */ + + double plen = NR::L2(node->p.pos - node->pos); + if (plen < 1e-18) return; + double nlen = NR::L2(node->n.pos - node->pos); + if (nlen < 1e-18) return; + node->p.pos = node->pos - (plen / (plen + nlen)) * delta; + node->n.pos = node->pos + (nlen / (plen + nlen)) * delta; + sp_node_ensure_ctrls(node); +} + +/** + * Knot events handler callback. + */ +static gboolean node_event(SPKnot *knot, GdkEvent *event,Inkscape::NodePath::Node *n) +{ + gboolean ret = FALSE; + switch (event->type) { + case GDK_ENTER_NOTIFY: + active_node = n; + break; + case GDK_LEAVE_NOTIFY: + active_node = NULL; + break; + case GDK_KEY_PRESS: + switch (get_group0_keyval (&event->key)) { + case GDK_space: + if (event->key.state & GDK_BUTTON1_MASK) { + Inkscape::NodePath::Path *nodepath = n->subpath->nodepath; + stamp_repr(nodepath); + ret = TRUE; + } + break; + default: + break; + } + break; + default: + break; + } + + return ret; +} + +/** + * Handle keypress on node; directly called. + */ +gboolean node_key(GdkEvent *event) +{ + Inkscape::NodePath::Path *np; + + // there is no way to verify nodes so set active_node to nil when deleting!! + if (active_node == NULL) return FALSE; + + if ((event->type == GDK_KEY_PRESS) && !(event->key.state & (GDK_SHIFT_MASK | GDK_CONTROL_MASK))) { + gint ret = FALSE; + switch (get_group0_keyval (&event->key)) { + /// \todo FIXME: this does not seem to work, the keys are stolen by tool contexts! + case GDK_BackSpace: + np = active_node->subpath->nodepath; + sp_nodepath_node_destroy(active_node); + update_repr(np); + active_node = NULL; + ret = TRUE; + break; + case GDK_c: + sp_nodepath_set_node_type(active_node,Inkscape::NodePath::NODE_CUSP); + ret = TRUE; + break; + case GDK_s: + sp_nodepath_set_node_type(active_node,Inkscape::NodePath::NODE_SMOOTH); + ret = TRUE; + break; + case GDK_y: + sp_nodepath_set_node_type(active_node,Inkscape::NodePath::NODE_SYMM); + ret = TRUE; + break; + case GDK_b: + sp_nodepath_node_break(active_node); + ret = TRUE; + break; + } + return ret; + } + return FALSE; +} + +/** + * Mouseclick on node callback. + */ +static void node_clicked(SPKnot *knot, guint state, gpointer data) +{ + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data; + + if (state & GDK_CONTROL_MASK) { + Inkscape::NodePath::Path *nodepath = n->subpath->nodepath; + + if (!(state & GDK_MOD1_MASK)) { // ctrl+click: toggle node type + if (n->type == Inkscape::NodePath::NODE_CUSP) { + sp_nodepath_convert_node_type (n,Inkscape::NodePath::NODE_SMOOTH); + } else if (n->type == Inkscape::NodePath::NODE_SMOOTH) { + sp_nodepath_convert_node_type (n,Inkscape::NodePath::NODE_SYMM); + } else { + sp_nodepath_convert_node_type (n,Inkscape::NodePath::NODE_CUSP); + } + update_repr(nodepath); + sp_nodepath_update_statusbar(nodepath); + + } else { //ctrl+alt+click: delete node + sp_nodepath_node_destroy(n); + //clean up the nodepath (such as for trivial subpaths) + sp_nodepath_cleanup(nodepath); + + // if the entire nodepath is removed, delete the selected object. + if (nodepath->subpaths == NULL || + sp_nodepath_get_node_count(nodepath) < 2) { + SPDocument *document = SP_DT_DOCUMENT (nodepath->desktop); + sp_nodepath_destroy(nodepath); + sp_selection_delete(); + sp_document_done (document); + + } else { + sp_nodepath_ensure_ctrls(nodepath); + update_repr(nodepath); + sp_nodepath_update_statusbar(nodepath); + } + } + + } else { + sp_nodepath_node_select(n, (state & GDK_SHIFT_MASK), FALSE); + } +} + +/** + * Mouse grabbed node callback. + */ +static void node_grabbed(SPKnot *knot, guint state, gpointer data) +{ + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data; + + n->origin = knot->pos; + + if (!n->selected) { + sp_nodepath_node_select(n, (state & GDK_SHIFT_MASK), FALSE); + } +} + +/** + * Mouse ungrabbed node callback. + */ +static void node_ungrabbed(SPKnot *knot, guint state, gpointer data) +{ + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data; + + n->dragging_out = NULL; + + update_repr(n->subpath->nodepath); +} + +/** + * The point on a line, given by its angle, closest to the given point. + * \param p A point. + * \param a Angle of the line; it is assumed to go through coordinate origin. + * \param closest Pointer to the point struct where the result is stored. + * \todo FIXME: use dot product perhaps? + */ +static void point_line_closest(NR::Point *p, double a, NR::Point *closest) +{ + if (a == HUGE_VAL) { // vertical + *closest = NR::Point(0, (*p)[NR::Y]); + } else { + (*closest)[NR::X] = ( a * (*p)[NR::Y] + (*p)[NR::X]) / (a*a + 1); + (*closest)[NR::Y] = a * (*closest)[NR::X]; + } +} + +/** + * Distance from the point to a line given by its angle. + * \param p A point. + * \param a Angle of the line; it is assumed to go through coordinate origin. + */ +static double point_line_distance(NR::Point *p, double a) +{ + NR::Point c; + point_line_closest(p, a, &c); + return sqrt(((*p)[NR::X] - c[NR::X])*((*p)[NR::X] - c[NR::X]) + ((*p)[NR::Y] - c[NR::Y])*((*p)[NR::Y] - c[NR::Y])); +} + +/** + * Callback for node "request" signal. + * \todo fixme: This goes to "moved" event? (lauris) + */ +static gboolean +node_request(SPKnot *knot, NR::Point *p, guint state, gpointer data) +{ + double yn, xn, yp, xp; + double an, ap, na, pa; + double d_an, d_ap, d_na, d_pa; + gboolean collinear = FALSE; + NR::Point c; + NR::Point pr; + + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data; + + // If either (Shift and some handle retracted), or (we're already dragging out a handle) + if (((state & GDK_SHIFT_MASK) && ((n->n.other && n->n.pos == n->pos) || (n->p.other && n->p.pos == n->pos))) || n->dragging_out) { + + NR::Point mouse = (*p); + + if (!n->dragging_out) { + // This is the first drag-out event; find out which handle to drag out + double appr_n = (n->n.other ? NR::L2(n->n.other->pos - n->pos) - NR::L2(n->n.other->pos - (*p)) : -HUGE_VAL); + double appr_p = (n->p.other ? NR::L2(n->p.other->pos - n->pos) - NR::L2(n->p.other->pos - (*p)) : -HUGE_VAL); + + if (appr_p == -HUGE_VAL && appr_n == -HUGE_VAL) // orphan node? + return FALSE; + + Inkscape::NodePath::NodeSide *opposite; + if (appr_p > appr_n) { // closer to p + n->dragging_out = &n->p; + opposite = &n->n; + n->code = NR_CURVETO; + } else if (appr_p < appr_n) { // closer to n + n->dragging_out = &n->n; + opposite = &n->p; + n->n.other->code = NR_CURVETO; + } else { // p and n nodes are the same + if (n->n.pos != n->pos) { // n handle already dragged, drag p + n->dragging_out = &n->p; + opposite = &n->n; + n->code = NR_CURVETO; + } else if (n->p.pos != n->pos) { // p handle already dragged, drag n + n->dragging_out = &n->n; + opposite = &n->p; + n->n.other->code = NR_CURVETO; + } else { // find out to which handle of the adjacent node we're closer; note that n->n.other == n->p.other + double appr_other_n = (n->n.other ? NR::L2(n->n.other->n.pos - n->pos) - NR::L2(n->n.other->n.pos - (*p)) : -HUGE_VAL); + double appr_other_p = (n->n.other ? NR::L2(n->n.other->p.pos - n->pos) - NR::L2(n->n.other->p.pos - (*p)) : -HUGE_VAL); + if (appr_other_p > appr_other_n) { // closer to other's p handle + n->dragging_out = &n->n; + opposite = &n->p; + n->n.other->code = NR_CURVETO; + } else { // closer to other's n handle + n->dragging_out = &n->p; + opposite = &n->n; + n->code = NR_CURVETO; + } + } + } + + // if there's another handle, make sure the one we drag out starts parallel to it + if (opposite->pos != n->pos) { + mouse = n->pos - NR::L2(mouse - n->pos) * NR::unit_vector(opposite->pos - n->pos); + } + } + + // pass this on to the handle-moved callback + node_ctrl_moved(n->dragging_out->knot, &mouse, state, (gpointer) n); + sp_node_ensure_ctrls(n); + return TRUE; + } + + if (state & GDK_CONTROL_MASK) { // constrained motion + + // calculate relative distances of handles + // n handle: + yn = n->n.pos[NR::Y] - n->pos[NR::Y]; + xn = n->n.pos[NR::X] - n->pos[NR::X]; + // if there's no n handle (straight line), see if we can use the direction to the next point on path + if ((n->n.other && n->n.other->code == NR_LINETO) || fabs(yn) + fabs(xn) < 1e-6) { + if (n->n.other) { // if there is the next point + if (L2(n->n.other->p.pos - n->n.other->pos) < 1e-6) // and the next point has no handle either + yn = n->n.other->pos[NR::Y] - n->origin[NR::Y]; // use origin because otherwise the direction will change as you drag + xn = n->n.other->pos[NR::X] - n->origin[NR::X]; + } + } + if (xn < 0) { xn = -xn; yn = -yn; } // limit the angle to between 0 and pi + if (yn < 0) { xn = -xn; yn = -yn; } + + // p handle: + yp = n->p.pos[NR::Y] - n->pos[NR::Y]; + xp = n->p.pos[NR::X] - n->pos[NR::X]; + // if there's no p handle (straight line), see if we can use the direction to the prev point on path + if (n->code == NR_LINETO || fabs(yp) + fabs(xp) < 1e-6) { + if (n->p.other) { + if (L2(n->p.other->n.pos - n->p.other->pos) < 1e-6) + yp = n->p.other->pos[NR::Y] - n->origin[NR::Y]; + xp = n->p.other->pos[NR::X] - n->origin[NR::X]; + } + } + if (xp < 0) { xp = -xp; yp = -yp; } // limit the angle to between 0 and pi + if (yp < 0) { xp = -xp; yp = -yp; } + + if (state & GDK_MOD1_MASK && !(xn == 0 && xp == 0)) { + // sliding on handles, only if at least one of the handles is non-vertical + // (otherwise it's the same as ctrl+drag anyway) + + // calculate angles of the control handles + if (xn == 0) { + if (yn == 0) { // no handle, consider it the continuation of the other one + an = 0; + collinear = TRUE; + } + else an = 0; // vertical; set the angle to horizontal + } else an = yn/xn; + + if (xp == 0) { + if (yp == 0) { // no handle, consider it the continuation of the other one + ap = an; + } + else ap = 0; // vertical; set the angle to horizontal + } else ap = yp/xp; + + if (collinear) an = ap; + + // angles of the perpendiculars; HUGE_VAL means vertical + if (an == 0) na = HUGE_VAL; else na = -1/an; + if (ap == 0) pa = HUGE_VAL; else pa = -1/ap; + + //g_print("an %g ap %g\n", an, ap); + + // mouse point relative to the node's original pos + pr = (*p) - n->origin; + + // distances to the four lines (two handles and two perpendiculars) + d_an = point_line_distance(&pr, an); + d_na = point_line_distance(&pr, na); + d_ap = point_line_distance(&pr, ap); + d_pa = point_line_distance(&pr, pa); + + // find out which line is the closest, save its closest point in c + if (d_an <= d_na && d_an <= d_ap && d_an <= d_pa) { + point_line_closest(&pr, an, &c); + } else if (d_ap <= d_an && d_ap <= d_na && d_ap <= d_pa) { + point_line_closest(&pr, ap, &c); + } else if (d_na <= d_an && d_na <= d_ap && d_na <= d_pa) { + point_line_closest(&pr, na, &c); + } else if (d_pa <= d_an && d_pa <= d_ap && d_pa <= d_na) { + point_line_closest(&pr, pa, &c); + } + + // move the node to the closest point + sp_nodepath_selected_nodes_move(n->subpath->nodepath, + n->origin[NR::X] + c[NR::X] - n->pos[NR::X], + n->origin[NR::Y] + c[NR::Y] - n->pos[NR::Y]); + + } else { // constraining to hor/vert + + if (fabs((*p)[NR::X] - n->origin[NR::X]) > fabs((*p)[NR::Y] - n->origin[NR::Y])) { // snap to hor + sp_nodepath_selected_nodes_move(n->subpath->nodepath, (*p)[NR::X] - n->pos[NR::X], n->origin[NR::Y] - n->pos[NR::Y]); + } else { // snap to vert + sp_nodepath_selected_nodes_move(n->subpath->nodepath, n->origin[NR::X] - n->pos[NR::X], (*p)[NR::Y] - n->pos[NR::Y]); + } + } + } else { // move freely + sp_nodepath_selected_nodes_move(n->subpath->nodepath, + (*p)[NR::X] - n->pos[NR::X], + (*p)[NR::Y] - n->pos[NR::Y], + (state & GDK_SHIFT_MASK) == 0); + } + + n->subpath->nodepath->desktop->scroll_to_point(p); + + return TRUE; +} + +/** + * Node handle clicked callback. + */ +static void node_ctrl_clicked(SPKnot *knot, guint state, gpointer data) +{ + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data; + + if (state & GDK_CONTROL_MASK) { // "delete" handle + if (n->p.knot == knot) { + n->p.pos = n->pos; + } else if (n->n.knot == knot) { + n->n.pos = n->pos; + } + sp_node_ensure_ctrls(n); + Inkscape::NodePath::Path *nodepath = n->subpath->nodepath; + update_repr(nodepath); + sp_nodepath_update_statusbar(nodepath); + + } else { // just select or add to selection, depending in Shift + sp_nodepath_node_select(n, (state & GDK_SHIFT_MASK), FALSE); + } +} + +/** + * Node handle grabbed callback. + */ +static void node_ctrl_grabbed(SPKnot *knot, guint state, gpointer data) +{ + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data; + + if (!n->selected) { + sp_nodepath_node_select(n, (state & GDK_SHIFT_MASK), FALSE); + } + + // remember the origin of the control + if (n->p.knot == knot) { + n->p.origin = n->p.pos - n->pos; + } else if (n->n.knot == knot) { + n->n.origin = n->n.pos - n->pos; + } else { + g_assert_not_reached(); + } + +} + +/** + * Node handle ungrabbed callback. + */ +static void node_ctrl_ungrabbed(SPKnot *knot, guint state, gpointer data) +{ + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data; + + // forget origin and set knot position once more (because it can be wrong now due to restrictions) + if (n->p.knot == knot) { + n->p.origin.a = 0; + sp_knot_set_position(knot, &n->p.pos, state); + } else if (n->n.knot == knot) { + n->n.origin.a = 0; + sp_knot_set_position(knot, &n->n.pos, state); + } else { + g_assert_not_reached(); + } + + update_repr(n->subpath->nodepath); +} + +/** + * Node handle "request" signal callback. + */ +static gboolean node_ctrl_request(SPKnot *knot, NR::Point *p, guint state, gpointer data) +{ + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data; + + Inkscape::NodePath::NodeSide *me, *opposite; + gint which; + if (n->p.knot == knot) { + me = &n->p; + opposite = &n->n; + which = -1; + } else if (n->n.knot == knot) { + me = &n->n; + opposite = &n->p; + which = 1; + } else { + me = opposite = NULL; + which = 0; + g_assert_not_reached(); + } + + NRPathcode const othercode = sp_node_path_code_from_side(n, opposite); + + SnapManager const m(n->subpath->nodepath->desktop->namedview); + + if (opposite->other && (n->type != Inkscape::NodePath::NODE_CUSP) && (othercode == NR_LINETO)) { + /* We are smooth node adjacent with line */ + NR::Point const delta = *p - n->pos; + NR::Coord const len = NR::L2(delta); + Inkscape::NodePath::Node *othernode = opposite->other; + NR::Point const ndelta = n->pos - othernode->pos; + NR::Coord const linelen = NR::L2(ndelta); + if (len > NR_EPSILON && linelen > NR_EPSILON) { + NR::Coord const scal = dot(delta, ndelta) / linelen; + (*p) = n->pos + (scal / linelen) * ndelta; + } + *p = m.constrainedSnap(Inkscape::Snapper::SNAP_POINT, *p, ndelta, NULL).getPoint(); + } else { + *p = m.freeSnap(Inkscape::Snapper::SNAP_POINT, *p, NULL).getPoint(); + } + + sp_node_adjust_knot(n, -which); + + return FALSE; +} + +/** + * Node handle moved callback. + */ +static void node_ctrl_moved(SPKnot *knot, NR::Point *p, guint state, gpointer data) +{ + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) data; + + Inkscape::NodePath::NodeSide *me; + Inkscape::NodePath::NodeSide *other; + if (n->p.knot == knot) { + me = &n->p; + other = &n->n; + } else if (n->n.knot == knot) { + me = &n->n; + other = &n->p; + } else { + me = NULL; + other = NULL; + g_assert_not_reached(); + } + + // calculate radial coordinates of the grabbed control, other control, and the mouse point + Radial rme(me->pos - n->pos); + Radial rother(other->pos - n->pos); + Radial rnew(*p - n->pos); + + if (state & GDK_CONTROL_MASK && rnew.a != HUGE_VAL) { + int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12); + /* 0 interpreted as "no snapping". */ + + // The closest PI/snaps angle, starting from zero. + double const a_snapped = floor(rnew.a/(M_PI/snaps) + 0.5) * (M_PI/snaps); + if (me->origin.a == HUGE_VAL) { + // ortho doesn't exist: original control was zero length. + rnew.a = a_snapped; + } else { + /* The closest PI/2 angle, starting from original angle (i.e. snapping to original, + * its opposite and perpendiculars). */ + double const a_ortho = me->origin.a + floor((rnew.a - me->origin.a)/(M_PI/2) + 0.5) * (M_PI/2); + + // Snap to the closest. + rnew.a = ( fabs(a_snapped - rnew.a) < fabs(a_ortho - rnew.a) + ? a_snapped + : a_ortho ); + } + } + + if (state & GDK_MOD1_MASK) { + // lock handle length + rnew.r = me->origin.r; + } + + if (( n->type !=Inkscape::NodePath::NODE_CUSP || (state & GDK_SHIFT_MASK)) + && rme.a != HUGE_VAL && rnew.a != HUGE_VAL && fabs(rme.a - rnew.a) > 0.001) { + // rotate the other handle correspondingly, if both old and new angles exist and are not the same + rother.a += rnew.a - rme.a; + other->pos = NR::Point(rother) + n->pos; + sp_ctrlline_set_coords(SP_CTRLLINE(other->line), n->pos, other->pos); + sp_knot_set_position(other->knot, &other->pos, 0); + } + + me->pos = NR::Point(rnew) + n->pos; + sp_ctrlline_set_coords(SP_CTRLLINE(me->line), n->pos, me->pos); + + // this is what sp_knot_set_position does, but without emitting the signal: + // we cannot emit a "moved" signal because we're now processing it + if (me->knot->item) SP_CTRL(me->knot->item)->moveto(me->pos); + + knot->desktop->set_coordinate_status(me->pos); + + update_object(n->subpath->nodepath); + + /* status text */ + SPDesktop *desktop = n->subpath->nodepath->desktop; + if (!desktop) return; + SPEventContext *ec = desktop->event_context; + if (!ec) return; + Inkscape::MessageContext *mc = SP_NODE_CONTEXT (ec)->_node_message_context; + if (!mc) return; + + double degrees = 180 / M_PI * rnew.a; + if (degrees > 180) degrees -= 360; + if (degrees < -180) degrees += 360; + if (prefs_get_int_attribute("options.compassangledisplay", "value", 0) != 0) + degrees = angle_to_compass (degrees); + + GString *length = SP_PX_TO_METRIC_STRING(rnew.r, desktop->namedview->getDefaultMetric()); + + mc->setF(Inkscape::NORMAL_MESSAGE, + _("<b>Node handle</b>: angle %0.2f°, length %s; with <b>Ctrl</b> to snap angle; with <b>Alt</b> to lock length; with <b>Shift</b> to rotate both handles"), degrees, length->str); + + g_string_free(length, TRUE); +} + +/** + * Node handle event callback. + */ +static gboolean node_ctrl_event(SPKnot *knot, GdkEvent *event,Inkscape::NodePath::Node *n) +{ + gboolean ret = FALSE; + switch (event->type) { + case GDK_KEY_PRESS: + switch (get_group0_keyval (&event->key)) { + case GDK_space: + if (event->key.state & GDK_BUTTON1_MASK) { + Inkscape::NodePath::Path *nodepath = n->subpath->nodepath; + stamp_repr(nodepath); + ret = TRUE; + } + break; + default: + break; + } + break; + default: + break; + } + + return ret; +} + +static void node_rotate_one_internal(Inkscape::NodePath::Node const &n, gdouble const angle, + Radial &rme, Radial &rother, gboolean const both) +{ + rme.a += angle; + if ( both + || ( n.type == Inkscape::NodePath::NODE_SMOOTH ) + || ( n.type == Inkscape::NodePath::NODE_SYMM ) ) + { + rother.a += angle; + } +} + +static void node_rotate_one_internal_screen(Inkscape::NodePath::Node const &n, gdouble const angle, + Radial &rme, Radial &rother, gboolean const both) +{ + gdouble const norm_angle = angle / n.subpath->nodepath->desktop->current_zoom(); + + gdouble r; + if ( both + || ( n.type == Inkscape::NodePath::NODE_SMOOTH ) + || ( n.type == Inkscape::NodePath::NODE_SYMM ) ) + { + r = MAX(rme.r, rother.r); + } else { + r = rme.r; + } + + gdouble const weird_angle = atan2(norm_angle, r); +/* Bulia says norm_angle is just the visible distance that the + * object's end must travel on the screen. Left as 'angle' for want of + * a better name.*/ + + rme.a += weird_angle; + if ( both + || ( n.type == Inkscape::NodePath::NODE_SMOOTH ) + || ( n.type == Inkscape::NodePath::NODE_SYMM ) ) + { + rother.a += weird_angle; + } +} + +/** + * Rotate one node. + */ +static void node_rotate_one (Inkscape::NodePath::Node *n, gdouble angle, int which, gboolean screen) +{ + Inkscape::NodePath::NodeSide *me, *other; + bool both = false; + + double xn = n->n.other? n->n.other->pos[NR::X] : n->pos[NR::X]; + double xp = n->p.other? n->p.other->pos[NR::X] : n->pos[NR::X]; + + if (!n->n.other) { // if this is an endnode, select its single handle regardless of "which" + me = &(n->p); + other = &(n->n); + } else if (!n->p.other) { + me = &(n->n); + other = &(n->p); + } else { + if (which > 0) { // right handle + if (xn > xp) { + me = &(n->n); + other = &(n->p); + } else { + me = &(n->p); + other = &(n->n); + } + } else if (which < 0){ // left handle + if (xn <= xp) { + me = &(n->n); + other = &(n->p); + } else { + me = &(n->p); + other = &(n->n); + } + } else { // both handles + me = &(n->n); + other = &(n->p); + both = true; + } + } + + Radial rme(me->pos - n->pos); + Radial rother(other->pos - n->pos); + + if (screen) { + node_rotate_one_internal_screen (*n, angle, rme, rother, both); + } else { + node_rotate_one_internal (*n, angle, rme, rother, both); + } + + me->pos = n->pos + NR::Point(rme); + + if (both || n->type == Inkscape::NodePath::NODE_SMOOTH || n->type == Inkscape::NodePath::NODE_SYMM) { + other->pos = n->pos + NR::Point(rother); + } + + sp_node_ensure_ctrls(n); +} + +/** + * Rotate selected nodes. + */ +void sp_nodepath_selected_nodes_rotate(Inkscape::NodePath::Path *nodepath, gdouble angle, int which, bool screen) +{ + if (!nodepath || !nodepath->selected) return; + + if (g_list_length(nodepath->selected) == 1) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) nodepath->selected->data; + node_rotate_one (n, angle, which, screen); + } else { + // rotate as an object: + + Inkscape::NodePath::Node *n0 = (Inkscape::NodePath::Node *) nodepath->selected->data; + NR::Rect box (n0->pos, n0->pos); // originally includes the first selected node + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + box.expandTo (n->pos); // contain all selected nodes + } + + gdouble rot; + if (screen) { + gdouble const zoom = nodepath->desktop->current_zoom(); + gdouble const zmove = angle / zoom; + gdouble const r = NR::L2(box.max() - box.midpoint()); + rot = atan2(zmove, r); + } else { + rot = angle; + } + + NR::Matrix t = + NR::Matrix (NR::translate(-box.midpoint())) * + NR::Matrix (NR::rotate(rot)) * + NR::Matrix (NR::translate(box.midpoint())); + + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + n->pos *= t; + n->n.pos *= t; + n->p.pos *= t; + sp_node_ensure_ctrls(n); + } + } + + update_object(nodepath); + /// \todo fixme: use _keyed + update_repr(nodepath); +} + +/** + * Scale one node. + */ +static void node_scale_one (Inkscape::NodePath::Node *n, gdouble grow, int which) +{ + bool both = false; + Inkscape::NodePath::NodeSide *me, *other; + + double xn = n->n.other? n->n.other->pos[NR::X] : n->pos[NR::X]; + double xp = n->p.other? n->p.other->pos[NR::X] : n->pos[NR::X]; + + if (!n->n.other) { // if this is an endnode, select its single handle regardless of "which" + me = &(n->p); + other = &(n->n); + n->code = NR_CURVETO; + } else if (!n->p.other) { + me = &(n->n); + other = &(n->p); + if (n->n.other) + n->n.other->code = NR_CURVETO; + } else { + if (which > 0) { // right handle + if (xn > xp) { + me = &(n->n); + other = &(n->p); + if (n->n.other) + n->n.other->code = NR_CURVETO; + } else { + me = &(n->p); + other = &(n->n); + n->code = NR_CURVETO; + } + } else if (which < 0){ // left handle + if (xn <= xp) { + me = &(n->n); + other = &(n->p); + if (n->n.other) + n->n.other->code = NR_CURVETO; + } else { + me = &(n->p); + other = &(n->n); + n->code = NR_CURVETO; + } + } else { // both handles + me = &(n->n); + other = &(n->p); + both = true; + n->code = NR_CURVETO; + if (n->n.other) + n->n.other->code = NR_CURVETO; + } + } + + Radial rme(me->pos - n->pos); + Radial rother(other->pos - n->pos); + + rme.r += grow; + if (rme.r < 0) rme.r = 0; + if (rme.a == HUGE_VAL) { + if (me->other) { // if direction is unknown, initialize it towards the next node + Radial rme_next(me->other->pos - n->pos); + rme.a = rme_next.a; + } else { // if there's no next, initialize to 0 + rme.a = 0; + } + } + if (both || n->type == Inkscape::NodePath::NODE_SYMM) { + rother.r += grow; + if (rother.r < 0) rother.r = 0; + if (rother.a == HUGE_VAL) { + rother.a = rme.a + M_PI; + } + } + + me->pos = n->pos + NR::Point(rme); + + if (both || n->type == Inkscape::NodePath::NODE_SYMM) { + other->pos = n->pos + NR::Point(rother); + } + + sp_node_ensure_ctrls(n); +} + +/** + * Scale selected nodes. + */ +void sp_nodepath_selected_nodes_scale(Inkscape::NodePath::Path *nodepath, gdouble const grow, int const which) +{ + if (!nodepath || !nodepath->selected) return; + + if (g_list_length(nodepath->selected) == 1) { + // scale handles of the single selected node + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) nodepath->selected->data; + node_scale_one (n, grow, which); + } else { + // scale nodes as an "object": + + Inkscape::NodePath::Node *n0 = (Inkscape::NodePath::Node *) nodepath->selected->data; + NR::Rect box (n0->pos, n0->pos); // originally includes the first selected node + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + box.expandTo (n->pos); // contain all selected nodes + } + + double scale = (box.maxExtent() + grow)/box.maxExtent(); + + NR::Matrix t = + NR::Matrix (NR::translate(-box.midpoint())) * + NR::Matrix (NR::scale(scale, scale)) * + NR::Matrix (NR::translate(box.midpoint())); + + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + n->pos *= t; + n->n.pos *= t; + n->p.pos *= t; + sp_node_ensure_ctrls(n); + } + } + + update_object(nodepath); + /// \todo fixme: use _keyed + update_repr(nodepath); +} + +void sp_nodepath_selected_nodes_scale_screen(Inkscape::NodePath::Path *nodepath, gdouble const grow, int const which) +{ + if (!nodepath) return; + sp_nodepath_selected_nodes_scale(nodepath, grow / nodepath->desktop->current_zoom(), which); +} + +/** + * Flip selected nodes horizontally/vertically. + */ +void sp_nodepath_flip (Inkscape::NodePath::Path *nodepath, NR::Dim2 axis) +{ + if (!nodepath || !nodepath->selected) return; + + if (g_list_length(nodepath->selected) == 1) { + // flip handles of the single selected node + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) nodepath->selected->data; + double temp = n->p.pos[axis]; + n->p.pos[axis] = n->n.pos[axis]; + n->n.pos[axis] = temp; + sp_node_ensure_ctrls(n); + } else { + // scale nodes as an "object": + + Inkscape::NodePath::Node *n0 = (Inkscape::NodePath::Node *) nodepath->selected->data; + NR::Rect box (n0->pos, n0->pos); // originally includes the first selected node + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + box.expandTo (n->pos); // contain all selected nodes + } + + NR::Matrix t = + NR::Matrix (NR::translate(-box.midpoint())) * + NR::Matrix ((axis == NR::X)? NR::scale(-1, 1) : NR::scale(1, -1)) * + NR::Matrix (NR::translate(box.midpoint())); + + for (GList *l = nodepath->selected; l != NULL; l = l->next) { + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data; + n->pos *= t; + n->n.pos *= t; + n->p.pos *= t; + sp_node_ensure_ctrls(n); + } + } + + update_object(nodepath); + /// \todo fixme: use _keyed + update_repr(nodepath); +} + +//----------------------------------------------- +/** + * Return new subpath under given nodepath. + */ +static Inkscape::NodePath::SubPath *sp_nodepath_subpath_new(Inkscape::NodePath::Path *nodepath) +{ + g_assert(nodepath); + g_assert(nodepath->desktop); + + Inkscape::NodePath::SubPath *s = g_new(Inkscape::NodePath::SubPath, 1); + + s->nodepath = nodepath; + s->closed = FALSE; + s->nodes = NULL; + s->first = NULL; + s->last = NULL; + + // do not use prepend here because: + // if you have a path like "subpath_1 subpath_2 ... subpath_k" in the svg, you end up with + // subpath_k -> ... ->subpath_1 in the nodepath structure. thus the i-th node of the svg is not + // the i-th node in the nodepath (only if there are multiple subpaths) + // note that the problem only arise when called from subpath_from_bpath(), since for all the other + // cases, the repr is updated after the call to sp_nodepath_subpath_new() + nodepath->subpaths = g_list_append /*g_list_prepend*/ (nodepath->subpaths, s); + + return s; +} + +/** + * Destroy nodes in subpath, then subpath itself. + */ +static void sp_nodepath_subpath_destroy(Inkscape::NodePath::SubPath *subpath) +{ + g_assert(subpath); + g_assert(subpath->nodepath); + g_assert(g_list_find(subpath->nodepath->subpaths, subpath)); + + while (subpath->nodes) { + sp_nodepath_node_destroy((Inkscape::NodePath::Node *) subpath->nodes->data); + } + + subpath->nodepath->subpaths = g_list_remove(subpath->nodepath->subpaths, subpath); + + g_free(subpath); +} + +/** + * Link head to tail in subpath. + */ +static void sp_nodepath_subpath_close(Inkscape::NodePath::SubPath *sp) +{ + g_assert(!sp->closed); + g_assert(sp->last != sp->first); + g_assert(sp->first->code == NR_MOVETO); + + sp->closed = TRUE; + + //Link the head to the tail + sp->first->p.other = sp->last; + sp->last->n.other = sp->first; + sp->last->n.pos = sp->first->n.pos; + sp->first = sp->last; + + //Remove the extra end node + sp_nodepath_node_destroy(sp->last->n.other); +} + +/** + * Open closed (loopy) subpath at node. + */ +static void sp_nodepath_subpath_open(Inkscape::NodePath::SubPath *sp,Inkscape::NodePath::Node *n) +{ + g_assert(sp->closed); + g_assert(n->subpath == sp); + g_assert(sp->first == sp->last); + + /* We create new startpoint, current node will become last one */ + + Inkscape::NodePath::Node *new_path = sp_nodepath_node_new(sp, n->n.other,Inkscape::NodePath::NODE_CUSP, NR_MOVETO, + &n->pos, &n->pos, &n->n.pos); + + + sp->closed = FALSE; + + //Unlink to make a head and tail + sp->first = new_path; + sp->last = n; + n->n.other = NULL; + new_path->p.other = NULL; +} + +/** + * Returns area in triangle given by points; may be negative. + */ +inline double +triangle_area (NR::Point p1, NR::Point p2, NR::Point p3) +{ + return (p1[NR::X]*p2[NR::Y] + p1[NR::Y]*p3[NR::X] + p2[NR::X]*p3[NR::Y] - p2[NR::Y]*p3[NR::X] - p1[NR::Y]*p2[NR::X] - p1[NR::X]*p3[NR::Y]); +} + +/** + * Return new node in subpath with given properties. + * \param pos Position of node. + * \param ppos Handle position in previous direction + * \param npos Handle position in previous direction + */ +Inkscape::NodePath::Node * +sp_nodepath_node_new(Inkscape::NodePath::SubPath *sp, Inkscape::NodePath::Node *next, Inkscape::NodePath::NodeType type, NRPathcode code, NR::Point *ppos, NR::Point *pos, NR::Point *npos) +{ + g_assert(sp); + g_assert(sp->nodepath); + g_assert(sp->nodepath->desktop); + + if (nodechunk == NULL) + nodechunk = g_mem_chunk_create(Inkscape::NodePath::Node, 32, G_ALLOC_AND_FREE); + + Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node*)g_mem_chunk_alloc(nodechunk); + + n->subpath = sp; + + if (type != Inkscape::NodePath::NODE_NONE) { + // use the type from sodipodi:nodetypes + n->type = type; + } else { + if (fabs (triangle_area (*pos, *ppos, *npos)) < 1e-2) { + // points are (almost) collinear + if (NR::L2(*pos - *ppos) < 1e-6 || NR::L2(*pos - *npos) < 1e-6) { + // endnode, or a node with a retracted handle + n->type = Inkscape::NodePath::NODE_CUSP; + } else { + n->type = Inkscape::NodePath::NODE_SMOOTH; + } + } else { + n->type = Inkscape::NodePath::NODE_CUSP; + } + } + + n->code = code; + n->selected = FALSE; + n->pos = *pos; + n->p.pos = *ppos; + n->n.pos = *npos; + + n->dragging_out = NULL; + + Inkscape::NodePath::Node *prev; + if (next) { + g_assert(g_list_find(sp->nodes, next)); + prev = next->p.other; + } else { + prev = sp->last; + } + + if (prev) + prev->n.other = n; + else + sp->first = n; + + if (next) + next->p.other = n; + else + sp->last = n; + + n->p.other = prev; + n->n.other = next; + + n->knot = sp_knot_new(sp->nodepath->desktop); + sp_knot_set_position(n->knot, pos, 0); + g_object_set(G_OBJECT(n->knot), + "anchor", GTK_ANCHOR_CENTER, + "fill", NODE_FILL, + "fill_mouseover", NODE_FILL_HI, + "stroke", NODE_STROKE, + "stroke_mouseover", NODE_STROKE_HI, + "tip", _("<b>Node</b>: drag to edit the path; with <b>Ctrl</b> to snap to horizontal/vertical; with <b>Ctrl+Alt</b> to snap to handles' directions"), + NULL); + if (n->type == Inkscape::NodePath::NODE_CUSP) + g_object_set(G_OBJECT(n->knot), "shape", SP_KNOT_SHAPE_DIAMOND, "size", 9, NULL); + else + g_object_set(G_OBJECT(n->knot), "shape", SP_KNOT_SHAPE_SQUARE, "size", 7, NULL); + + g_signal_connect(G_OBJECT(n->knot), "event", G_CALLBACK(node_event), n); + g_signal_connect(G_OBJECT(n->knot), "clicked", G_CALLBACK(node_clicked), n); + g_signal_connect(G_OBJECT(n->knot), "grabbed", G_CALLBACK(node_grabbed), n); + g_signal_connect(G_OBJECT(n->knot), "ungrabbed", G_CALLBACK(node_ungrabbed), n); + g_signal_connect(G_OBJECT(n->knot), "request", G_CALLBACK(node_request), n); + sp_knot_show(n->knot); + + n->p.knot = sp_knot_new(sp->nodepath->desktop); + sp_knot_set_position(n->p.knot, ppos, 0); + g_object_set(G_OBJECT(n->p.knot), + "shape", SP_KNOT_SHAPE_CIRCLE, + "size", 7, + "anchor", GTK_ANCHOR_CENTER, + "fill", KNOT_FILL, + "fill_mouseover", KNOT_FILL_HI, + "stroke", KNOT_STROKE, + "stroke_mouseover", KNOT_STROKE_HI, + "tip", _("<b>Node handle</b>: drag to shape the curve; with <b>Ctrl</b> to snap angle; with <b>Alt</b> to lock length; with <b>Shift</b> to rotate both handles"), + NULL); + g_signal_connect(G_OBJECT(n->p.knot), "clicked", G_CALLBACK(node_ctrl_clicked), n); + g_signal_connect(G_OBJECT(n->p.knot), "grabbed", G_CALLBACK(node_ctrl_grabbed), n); + g_signal_connect(G_OBJECT(n->p.knot), "ungrabbed", G_CALLBACK(node_ctrl_ungrabbed), n); + g_signal_connect(G_OBJECT(n->p.knot), "request", G_CALLBACK(node_ctrl_request), n); + g_signal_connect(G_OBJECT(n->p.knot), "moved", G_CALLBACK(node_ctrl_moved), n); + g_signal_connect(G_OBJECT(n->p.knot), "event", G_CALLBACK(node_ctrl_event), n); + + sp_knot_hide(n->p.knot); + n->p.line = sp_canvas_item_new(SP_DT_CONTROLS(n->subpath->nodepath->desktop), + SP_TYPE_CTRLLINE, NULL); + sp_canvas_item_hide(n->p.line); + + n->n.knot = sp_knot_new(sp->nodepath->desktop); + sp_knot_set_position(n->n.knot, npos, 0); + g_object_set(G_OBJECT(n->n.knot), + "shape", SP_KNOT_SHAPE_CIRCLE, + "size", 7, + "anchor", GTK_ANCHOR_CENTER, + "fill", KNOT_FILL, + "fill_mouseover", KNOT_FILL_HI, + "stroke", KNOT_STROKE, + "stroke_mouseover", KNOT_STROKE_HI, + "tip", _("<b>Node handle</b>: drag to shape the curve; with <b>Ctrl</b> to snap angle; with <b>Alt</b> to lock length; with <b>Shift</b> to rotate the opposite handle in sync"), + NULL); + g_signal_connect(G_OBJECT(n->n.knot), "clicked", G_CALLBACK(node_ctrl_clicked), n); + g_signal_connect(G_OBJECT(n->n.knot), "grabbed", G_CALLBACK(node_ctrl_grabbed), n); + g_signal_connect(G_OBJECT(n->n.knot), "ungrabbed", G_CALLBACK(node_ctrl_ungrabbed), n); + g_signal_connect(G_OBJECT(n->n.knot), "request", G_CALLBACK(node_ctrl_request), n); + g_signal_connect(G_OBJECT(n->n.knot), "moved", G_CALLBACK(node_ctrl_moved), n); + g_signal_connect(G_OBJECT(n->n.knot), "event", G_CALLBACK(node_ctrl_event), n); + sp_knot_hide(n->n.knot); + n->n.line = sp_canvas_item_new(SP_DT_CONTROLS(n->subpath->nodepath->desktop), + SP_TYPE_CTRLLINE, NULL); + sp_canvas_item_hide(n->n.line); + + sp->nodes = g_list_prepend(sp->nodes, n); + + return n; +} + +/** + * Destroy node and its knots, link neighbors in subpath. + */ +static void sp_nodepath_node_destroy(Inkscape::NodePath::Node *node) +{ + g_assert(node); + g_assert(node->subpath); + g_assert(SP_IS_KNOT(node->knot)); + g_assert(SP_IS_KNOT(node->p.knot)); + g_assert(SP_IS_KNOT(node->n.knot)); + g_assert(g_list_find(node->subpath->nodes, node)); + + Inkscape::NodePath::SubPath *sp = node->subpath; + + if (node->selected) { // first, deselect + g_assert(g_list_find(node->subpath->nodepath->selected, node)); + node->subpath->nodepath->selected = g_list_remove(node->subpath->nodepath->selected, node); + } + + node->subpath->nodes = g_list_remove(node->subpath->nodes, node); + + g_object_unref(G_OBJECT(node->knot)); + g_object_unref(G_OBJECT(node->p.knot)); + g_object_unref(G_OBJECT(node->n.knot)); + + gtk_object_destroy(GTK_OBJECT(node->p.line)); + gtk_object_destroy(GTK_OBJECT(node->n.line)); + + if (sp->nodes) { // there are others nodes on the subpath + if (sp->closed) { + if (sp->first == node) { + g_assert(sp->last == node); + sp->first = node->n.other; + sp->last = sp->first; + } + node->p.other->n.other = node->n.other; + node->n.other->p.other = node->p.other; + } else { + if (sp->first == node) { + sp->first = node->n.other; + sp->first->code = NR_MOVETO; + } + if (sp->last == node) sp->last = node->p.other; + if (node->p.other) node->p.other->n.other = node->n.other; + if (node->n.other) node->n.other->p.other = node->p.other; + } + } else { // this was the last node on subpath + sp->nodepath->subpaths = g_list_remove(sp->nodepath->subpaths, sp); + } + + g_mem_chunk_free(nodechunk, node); +} + +/** + * Returns one of the node's two knots (node sides). + * \param which Indicates which side. + * \return Pointer to previous node side if which==-1, next if which==1. + */ +static Inkscape::NodePath::NodeSide *sp_node_get_side(Inkscape::NodePath::Node *node, gint which) +{ + g_assert(node); + + switch (which) { + case -1: + return &node->p; + case 1: + return &node->n; + default: + break; + } + + g_assert_not_reached(); + + return NULL; +} + +/** + * Return knot on other side of node. + */ +static Inkscape::NodePath::NodeSide *sp_node_opposite_side(Inkscape::NodePath::Node *node,Inkscape::NodePath::NodeSide *me) +{ + g_assert(node); + + if (me == &node->p) return &node->n; + if (me == &node->n) return &node->p; + + g_assert_not_reached(); + + return NULL; +} + +/** + * Return NRPathcode on this knot's side of the node. + */ +static NRPathcode sp_node_path_code_from_side(Inkscape::NodePath::Node *node,Inkscape::NodePath::NodeSide *me) +{ + g_assert(node); + + if (me == &node->p) { + if (node->p.other) return (NRPathcode)node->code; + return NR_MOVETO; + } + + if (me == &node->n) { + if (node->n.other) return (NRPathcode)node->n.other->code; + return NR_MOVETO; + } + + g_assert_not_reached(); + + return NR_END; +} + +/** + * Call sp_nodepath_line_add_node() at t on the segment denoted by piece + */ +Inkscape::NodePath::Node * +sp_nodepath_get_node_by_index(int index) +{ + Inkscape::NodePath::Node *e = NULL; + + Inkscape::NodePath::Path *nodepath = sp_nodepath_current(); + if (!nodepath) { + return e; + } + + //find segment + for (GList *l = nodepath->subpaths; l ; l=l->next) { + + Inkscape::NodePath::SubPath *sp = (Inkscape::NodePath::SubPath *)l->data; + int n = g_list_length(sp->nodes); + if (sp->closed) { + n++; + } + + //if the piece belongs to this subpath grab it + //otherwise move onto the next subpath + if (index < n) { + e = sp->first; + for (int i = 0; i < index; ++i) { + e = e->n.other; + } + break; + } else { + if (sp->closed) { + index -= (n+1); + } else { + index -= n; + } + } + } + + return e; +} + +/** + * Returns plain text meaning of node type. + */ +static gchar const *sp_node_type_description(Inkscape::NodePath::Node *node) +{ + unsigned retracted = 0; + bool endnode = false; + + for (int which = -1; which <= 1; which += 2) { + Inkscape::NodePath::NodeSide *side = sp_node_get_side(node, which); + if (side->other && NR::L2(side->pos - node->pos) < 1e-6) + retracted ++; + if (!side->other) + endnode = true; + } + + if (retracted == 0) { + if (endnode) { + // TRANSLATORS: "end" is an adjective here (NOT a verb) + return _("end node"); + } else { + switch (node->type) { + case Inkscape::NodePath::NODE_CUSP: + // TRANSLATORS: "cusp" means "sharp" (cusp node); see also the Advanced Tutorial + return _("cusp"); + case Inkscape::NodePath::NODE_SMOOTH: + // TRANSLATORS: "smooth" is an adjective here + return _("smooth"); + case Inkscape::NodePath::NODE_SYMM: + return _("symmetric"); + } + } + } else if (retracted == 1) { + if (endnode) { + // TRANSLATORS: "end" is an adjective here (NOT a verb) + return _("end node, handle retracted (drag with <b>Shift</b> to extend)"); + } else { + return _("one handle retracted (drag with <b>Shift</b> to extend)"); + } + } else { + return _("both handles retracted (drag with <b>Shift</b> to extend)"); + } + + return NULL; +} + +/** + * Handles content of statusbar as long as node tool is active. + */ +void +sp_nodepath_update_statusbar(Inkscape::NodePath::Path *nodepath) +{ + gchar const *when_selected = _("<b>Drag</b> nodes or node handles; <b>arrow</b> keys to move nodes"); + gchar const *when_selected_one = _("<b>Drag</b> the node or its handles; <b>arrow</b> keys to move the node"); + + gint total = 0; + gint selected = 0; + SPDesktop *desktop = NULL; + + if (nodepath) { + for (GList *spl = nodepath->subpaths; spl != NULL; spl = spl->next) { + Inkscape::NodePath::SubPath *subpath = (Inkscape::NodePath::SubPath *) spl->data; + total += g_list_length(subpath->nodes); + } + selected = g_list_length(nodepath->selected); + desktop = nodepath->desktop; + } else { + desktop = SP_ACTIVE_DESKTOP; + } + + SPEventContext *ec = desktop->event_context; + if (!ec) return; + Inkscape::MessageContext *mc = SP_NODE_CONTEXT (ec)->_node_message_context; + if (!mc) return; + + if (selected == 0) { + Inkscape::Selection *sel = desktop->selection; + if (!sel || sel->isEmpty()) { + mc->setF(Inkscape::NORMAL_MESSAGE, + _("Select a single object to edit its nodes or handles.")); + } else { + if (nodepath) { + mc->setF(Inkscape::NORMAL_MESSAGE, + ngettext("<b>0</b> out of <b>%i</b> node selected. <b>Click</b>, <b>Shift+click</b>, or <b>drag around</b> nodes to select.", + "<b>0</b> out of <b>%i</b> nodes selected. <b>Click</b>, <b>Shift+click</b>, or <b>drag around</b> nodes to select.", + total), + total); + } else { + if (g_slist_length((GSList *)sel->itemList()) == 1) { + mc->setF(Inkscape::NORMAL_MESSAGE, _("Drag the handles of the object to modify it.")); + } else { + mc->setF(Inkscape::NORMAL_MESSAGE, _("Select a single object to edit its nodes or handles.")); + } + } + } + } else if (nodepath && selected == 1) { + mc->setF(Inkscape::NORMAL_MESSAGE, + ngettext("<b>%i</b> of <b>%i</b> node selected; %s. %s.", + "<b>%i</b> of <b>%i</b> nodes selected; %s. %s.", + total), + selected, total, sp_node_type_description((Inkscape::NodePath::Node *) nodepath->selected->data), when_selected_one); + } else { + mc->setF(Inkscape::NORMAL_MESSAGE, + ngettext("<b>%i</b> of <b>%i</b> node selected. %s.", + "<b>%i</b> of <b>%i</b> nodes selected. %s.", + total), + selected, total, when_selected); + } +} + + +/* + 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:encoding=utf-8:textwidth=99 : |