Cross Reference: /inkscape/src/nodepath.cpp
nodepath.cpp revision be6b986fa79a3063539b1edf05fc21757116e334
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#define __SP_NODEPATH_C__
/** \file
* Path handler in node edit mode
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* bulia byak <buliabyak@users.sf.net>
*
* Portions of this code are in public domain; node sculpting functions written by bulia byak are under GNU GPL
*/
#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"
#include "verbs.h"
#include "display/bezier-utils.h"
#include <vector>
#include <algorithm>
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_update_handles(Inkscape::NodePath::Node *node, bool fire_move_signals = true);
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);
/* Adjust handle placement, if the node or the other handle is moved */
static void sp_node_adjust_handle(Inkscape::NodePath::Node *node, gint which_adjust);
static void sp_node_adjust_handles(Inkscape::NodePath::Node *node);
/* Node event callbacks */
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);
/* Handle event callbacks */
static void node_handle_clicked(SPKnot *knot, guint state, gpointer data);
static void node_handle_grabbed(SPKnot *knot, guint state, gpointer data);
static void node_handle_ungrabbed(SPKnot *knot, guint state, gpointer data);
static gboolean node_handle_request(SPKnot *knot, NR::Point *p, guint state, gpointer data);
static void node_handle_moved(SPKnot *knot, NR::Point *p, guint state, gpointer data);
static gboolean node_handle_event(SPKnot *knot, GdkEvent *event, Inkscape::NodePath::Node *n);
/* 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, bool show_handles)
{
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
np->livarot_path = NULL;
np->local_change = 0;
np->show_handles = show_handles;
// 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;
// create the subpath(s) from the bpath
NArtBpath *b = bpath;
while (b->code != NR_END) {
b = subpath_from_bpath(np, b, typestr + (b - bpath));
}
// reverse the list, because sp_nodepath_subpath_new() used g_list_prepend instead of append (for speed)
np->subpaths = g_list_reverse(np->subpaths);
g_free(typestr);
sp_curve_unref(curve);
// create the livarot representation from the same item
np->livarot_path = Path_for_item(item, true, true);
if (np->livarot_path)
np->livarot_path->ConvertWithBackData(0.01);
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);
if (np->livarot_path) {
delete np->livarot_path;
np->livarot_path = NULL;
}
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;
}
/**
* Return the subpath count of a given NodePath.
*/
static gint sp_nodepath_get_subpath_count(Inkscape::NodePath::Path *np)
{
if (!np)
return 0;
return g_list_length (np->subpaths);
}
/**
* Return the selected node count of a given NodePath.
*/
static gint sp_nodepath_selection_get_node_count(Inkscape::NodePath::Path *np)
{
if (!np)
return 0;
return g_list_length (np->selected);
}
/**
* Return the number of subpaths where nodes are selected in a given NodePath.
*/
static gint sp_nodepath_selection_get_subpath_count(Inkscape::NodePath::Path *np)
{
if (!np)
return 0;
if (!np->selected)
return 0;
if (!np->selected->next)
return 1;
gint count = 0;
for (GList *spl = np->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 (node->selected) {
count ++;
break;
}
}
}
return count;
}
/**
* 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 closed subpaths to be >=1 nodes, all open 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 && !sp->closed) || (sp_nodepath_subpath_get_node_count(sp)<1 && sp->closed))
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);
}
/**
* 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 nodepath, write it into that nodepath's SPShape item so that display is
* updated but repr is not (for speed). Used during curve and node drag.
*/
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(SP_CURVE_BPATH(curve));
if (repr->attribute("d") == NULL || strcmp(svgpath, repr->attribute("d"))) { // d changed
np->local_change++;
repr->setAttribute("d", svgpath);
}
if (repr->attribute("sodipodi:nodetypes") == NULL || strcmp(typestr, repr->attribute("sodipodi:nodetypes"))) { // nodetypes changed
np->local_change++;
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.
*/
void sp_nodepath_update_repr(Inkscape::NodePath::Path *np, const gchar *annotation)
{
update_repr_internal(np);
sp_document_done(sp_desktop_document(np->desktop), SP_VERB_CONTEXT_NODE,
annotation);
if (np->livarot_path) {
delete np->livarot_path;
np->livarot_path = NULL;
}
if (np->path && SP_IS_ITEM(np->path)) {
np->livarot_path = Path_for_item (np->path, true, true);
if (np->livarot_path)
np->livarot_path->ConvertWithBackData(0.01);
}
}
/**
* Update XML path node with data from path object, commit changes with undo.
*/
static void sp_nodepath_update_repr_keyed(Inkscape::NodePath::Path *np, gchar const *key, const gchar *annotation)
{
update_repr_internal(np);
sp_document_maybe_done(sp_desktop_document(np->desktop), key, SP_VERB_CONTEXT_NODE,
annotation);
if (np->livarot_path) {
delete np->livarot_path;
np->livarot_path = NULL;
}
if (np->path && SP_IS_ITEM(np->path)) {
np->livarot_path = Path_for_item (np->path, true, true);
if (np->livarot_path)
np->livarot_path->ConvertWithBackData(0.01);
}
}
/**
* 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(SP_CURVE_BPATH(curve));
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_desktop_document(np->desktop), SP_VERB_CONTEXT_NODE,
_("Stamp"));
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 handle 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_update_handles(start);
sp_node_update_handles(newnode);
sp_node_update_handles(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_handle_mirror_n_to_p(Inkscape::NodePath::Node *node)
{
node->p.pos = (node->pos + (node->pos - node->n.pos));
}
static void sp_node_handle_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_handle(start, -1);
sp_node_adjust_handle(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_handle(start, 1);
sp_node_adjust_handle(end, -1);
}
sp_node_update_handles(start);
sp_node_update_handles(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) {
node->knot->setShape (SP_KNOT_SHAPE_DIAMOND);
node->knot->setSize (node->selected? 11 : 9);
sp_knot_update_ctrl(node->knot);
} else {
node->knot->setShape (SP_KNOT_SHAPE_SQUARE);
node->knot->setSize (node->selected? 9 : 7);
sp_knot_update_ctrl(node->knot);
}
// if one of handles is mouseovered, preserve its position
if (node->p.knot && SP_KNOT_IS_MOUSEOVER(node->p.knot)) {
sp_node_adjust_handle(node, 1);
} else if (node->n.knot && SP_KNOT_IS_MOUSEOVER(node->n.knot)) {
sp_node_adjust_handle(node, -1);
} else {
sp_node_adjust_handles(node);
}
sp_node_update_handles(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_update_handles(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_update_handles(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_handle(node, 1);
sp_node_adjust_handle(node->p.other, -1);
}
}
if (node->n.other) {
if (node->n.other->code == NR_LINETO) {
sp_node_adjust_handle(node, -1);
sp_node_adjust_handle(node->n.other, 1);
}
}
// this function is only called from batch movers that will update display at the end
// themselves, so here we just move all the knots without emitting move signals, for speed
sp_node_update_handles(node, false);
}
/**
* 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 = NR_HUGE;
NR::Point delta(dx, dy);
NR::Point best_pt = delta;
if (snap) {
SnapManager const &m = nodepath->desktop->namedview->snap_manager;
for (GList *l = nodepath->selected; l != NULL; l = l->next) {
Inkscape::NodePath::Node *n = (Inkscape::NodePath::Node *) l->data;
Inkscape::SnappedPoint const s = m.freeSnap(Inkscape::Snapper::SNAP_POINT, n->pos + delta, NULL);
if (s.getDistance() < best) {
best = s.getDistance();
best_pt = s.getPoint() - n->pos;
}
}
}
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);
}
// do not update repr here so that node dragging is acceptably fast
update_object(nodepath);
}
/**
Function mapping x (in the range 0..1) to y (in the range 1..0) using a smooth half-bell-like
curve; the parameter alpha determines how blunt (alpha > 1) or sharp (alpha < 1) will be the curve
near x = 0.
*/
double
sculpt_profile (double x, double alpha, guint profile)
{
if (x >= 1)
return 0;
if (x <= 0)
return 1;
switch (profile) {
case SCULPT_PROFILE_LINEAR:
return 1 - x;
case SCULPT_PROFILE_BELL:
return (0.5 * cos (M_PI * (pow(x, alpha))) + 0.5);
case SCULPT_PROFILE_ELLIPTIC:
return sqrt(1 - x*x);
}
return 1;
}
double
bezier_length (NR::Point a, NR::Point ah, NR::Point bh, NR::Point b)
{
// extremely primitive for now, don't have time to look for the real one
double lower = NR::L2(b - a);
double upper = NR::L2(ah - a) + NR::L2(bh - ah) + NR::L2(bh - b);
return (lower + upper)/2;
}
void
sp_nodepath_move_node_and_handles (Inkscape::NodePath::Node *n, NR::Point delta, NR::Point delta_n, NR::Point delta_p)
{
n->pos = n->origin + delta;
n->n.pos = n->n.origin + delta_n;
n->p.pos = n->p.origin + delta_p;
sp_node_adjust_handles(n);
sp_node_update_handles(n, false);
}
/**
* Displace selected nodes and their handles by fractions of delta (from their origins), depending
* on how far they are from the dragged node n.
*/
static void
sp_nodepath_selected_nodes_sculpt(Inkscape::NodePath::Path *nodepath, Inkscape::NodePath::Node *n, NR::Point delta)
{
g_assert (n);
g_assert (nodepath);
g_assert (n->subpath->nodepath == nodepath);
double pressure = n->knot->pressure;
if (pressure == 0)
pressure = 0.5; // default
pressure = CLAMP (pressure, 0.2, 0.8);
// map pressure to alpha = 1/5 ... 5
double alpha = 1 - 2 * fabs(pressure - 0.5);
if (pressure > 0.5)
alpha = 1/alpha;
guint profile = prefs_get_int_attribute("tools.nodes", "sculpting_profile", SCULPT_PROFILE_BELL);
if (sp_nodepath_selection_get_subpath_count(nodepath) <= 1) {
// Only one subpath has selected nodes:
// use linear mode, where the distance from n to node being dragged is calculated along the path
double n_sel_range = 0, p_sel_range = 0;
guint n_nodes = 0, p_nodes = 0;
guint n_sel_nodes = 0, p_sel_nodes = 0;
// First pass: calculate ranges (TODO: we could cache them, as they don't change while dragging)
{
double n_range = 0, p_range = 0;
bool n_going = true, p_going = true;
Inkscape::NodePath::Node *n_node = n;
Inkscape::NodePath::Node *p_node = n;
do {
// Do one step in both directions from n, until reaching the end of subpath or bumping into each other
if (n_node && n_going)
n_node = n_node->n.other;
if (n_node == NULL) {
n_going = false;
} else {
n_nodes ++;
n_range += bezier_length (n_node->p.other->origin, n_node->p.other->n.origin, n_node->p.origin, n_node->origin);
if (n_node->selected) {
n_sel_nodes ++;
n_sel_range = n_range;
}
if (n_node == p_node) {
n_going = false;
p_going = false;
}
}
if (p_node && p_going)
p_node = p_node->p.other;
if (p_node == NULL) {
p_going = false;
} else {
p_nodes ++;
p_range += bezier_length (p_node->n.other->origin, p_node->n.other->p.origin, p_node->n.origin, p_node->origin);
if (p_node->selected) {
p_sel_nodes ++;
p_sel_range = p_range;
}
if (p_node == n_node) {
n_going = false;
p_going = false;
}
}
} while (n_going || p_going);
}
// Second pass: actually move nodes in this subpath
sp_nodepath_move_node_and_handles (n, delta, delta, delta);
{
double n_range = 0, p_range = 0;
bool n_going = true, p_going = true;
Inkscape::NodePath::Node *n_node = n;
Inkscape::NodePath::Node *p_node = n;
do {
// Do one step in both directions from n, until reaching the end of subpath or bumping into each other
if (n_node && n_going)
n_node = n_node->n.other;
if (n_node == NULL) {
n_going = false;
} else {
n_range += bezier_length (n_node->p.other->origin, n_node->p.other->n.origin, n_node->p.origin, n_node->origin);
if (n_node->selected) {
sp_nodepath_move_node_and_handles (n_node,
sculpt_profile (n_range / n_sel_range, alpha, profile) * delta,
sculpt_profile ((n_range + NR::L2(n_node->n.origin - n_node->origin)) / n_sel_range, alpha, profile) * delta,
sculpt_profile ((n_range - NR::L2(n_node->p.origin - n_node->origin)) / n_sel_range, alpha, profile) * delta);
}
if (n_node == p_node) {
n_going = false;
p_going = false;
}
}
if (p_node && p_going)
p_node = p_node->p.other;
if (p_node == NULL) {
p_going = false;
} else {
p_range += bezier_length (p_node->n.other->origin, p_node->n.other->p.origin, p_node->n.origin, p_node->origin);
if (p_node->selected) {
sp_nodepath_move_node_and_handles (p_node,
sculpt_profile (p_range / p_sel_range, alpha, profile) * delta,
sculpt_profile ((p_range - NR::L2(p_node->n.origin - p_node->origin)) / p_sel_range, alpha, profile) * delta,
sculpt_profile ((p_range + NR::L2(p_node->p.origin - p_node->origin)) / p_sel_range, alpha, profile) * delta);
}
if (p_node == n_node) {
n_going = false;
p_going = false;
}
}
} while (n_going || p_going);
}
} else {
// Multiple subpaths have selected nodes:
// use spatial mode, where the distance from n to node being dragged is measured directly as NR::L2.
// TODO: correct these distances taking into account their angle relative to the bisector, so as to
// fix the pear-like shape when sculpting e.g. a ring
// First pass: calculate range
gdouble direct_range = 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;
if (node->selected) {
direct_range = MAX(direct_range, NR::L2(node->origin - n->origin));
}
}
}
// Second pass: actually move nodes
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 (node->selected) {
if (direct_range > 1e-6) {
sp_nodepath_move_node_and_handles (node,
sculpt_profile (NR::L2(node->origin - n->origin) / direct_range, alpha, profile) * delta,
sculpt_profile (NR::L2(node->n.origin - n->origin) / direct_range, alpha, profile) * delta,
sculpt_profile (NR::L2(node->p.origin - n->origin) / direct_range, alpha, profile) * delta);
} else {
sp_nodepath_move_node_and_handles (node, delta, delta, delta);
}
}
}
}
}
// do not update repr here so that node dragging is acceptably fast
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) {
sp_nodepath_update_repr_keyed(nodepath, "node:move:vertical", _("Move nodes vertically"));
} else if (dy == 0) {
sp_nodepath_update_repr_keyed(nodepath, "node:move:horizontal", _("Move nodes horizontally"));
} else {
sp_nodepath_update_repr(nodepath, _("Move nodes"));
}
}
/**
* 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) {
sp_nodepath_update_repr_keyed(nodepath, "node:move:vertical", _("Move nodes vertically"));
} else if (dy == 0) {
sp_nodepath_update_repr_keyed(nodepath, "node:move:horizontal", _("Move nodes horizontally"));
} else {
sp_nodepath_update_repr(nodepath, _("Move nodes"));
}
}
/** If they don't yet exist, creates knot and line for the given side of the node */
static void sp_node_ensure_knot_exists (SPDesktop *desktop, Inkscape::NodePath::Node *node, Inkscape::NodePath::NodeSide *side)
{
if (!side->knot) {
side->knot = sp_knot_new(desktop, _("<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"));
side->knot->setShape (SP_KNOT_SHAPE_CIRCLE);
side->knot->setSize (7);
side->knot->setAnchor (GTK_ANCHOR_CENTER);
side->knot->setFill(KNOT_FILL, KNOT_FILL_HI, KNOT_FILL_HI);
side->knot->setStroke(KNOT_STROKE, KNOT_STROKE_HI, KNOT_STROKE_HI);
sp_knot_update_ctrl(side->knot);
g_signal_connect(G_OBJECT(side->knot), "clicked", G_CALLBACK(node_handle_clicked), node);
g_signal_connect(G_OBJECT(side->knot), "grabbed", G_CALLBACK(node_handle_grabbed), node);
g_signal_connect(G_OBJECT(side->knot), "ungrabbed", G_CALLBACK(node_handle_ungrabbed), node);
g_signal_connect(G_OBJECT(side->knot), "request", G_CALLBACK(node_handle_request), node);
g_signal_connect(G_OBJECT(side->knot), "moved", G_CALLBACK(node_handle_moved), node);
g_signal_connect(G_OBJECT(side->knot), "event", G_CALLBACK(node_handle_event), node);
}
if (!side->line) {
side->line = sp_canvas_item_new(sp_desktop_controls(desktop),
SP_TYPE_CTRLLINE, NULL);
}
}
/**
* Ensure the given handle of the node is visible/invisible, update its screen position
*/
static void sp_node_update_handle(Inkscape::NodePath::Node *node, gint which, gboolean show_handle, bool fire_move_signals)
{
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_handle = show_handle && (code == NR_CURVETO) && (NR::L2(side->pos - node->pos) > 1e-6);
if (show_handle) {
if (!side->knot) { // No handle knot at all
sp_node_ensure_knot_exists(node->subpath->nodepath->desktop, node, side);
// Just created, so we shouldn't fire the node_moved callback - instead set the knot position directly
side->knot->pos = side->pos;
if (side->knot->item)
SP_CTRL(side->knot->item)->moveto(side->pos);
sp_ctrlline_set_coords(SP_CTRLLINE(side->line), node->pos, side->pos);
sp_knot_show(side->knot);
} else {
if (side->knot->pos != side->pos) { // only if it's really moved
if (fire_move_signals) {
sp_knot_set_position(side->knot, &side->pos, 0); // this will set coords of the line as well
} else {
sp_knot_moveto(side->knot, &side->pos);
sp_ctrlline_set_coords(SP_CTRLLINE(side->line), node->pos, side->pos);
}
}
if (!SP_KNOT_IS_VISIBLE(side->knot)) {
sp_knot_show(side->knot);
}
}
sp_canvas_item_show(side->line);
} else {
if (side->knot) {
if (SP_KNOT_IS_VISIBLE(side->knot)) {
sp_knot_hide(side->knot);
}
}
if (side->line) {
sp_canvas_item_hide(side->line);
}
}
}
/**
* Ensure the node itself is visible, its handles and those of the neighbours of the node are
* visible if selected, update their screen positions. If fire_move_signals, move the node and its
* handles so that the corresponding signals are fired, callbacks are activated, and curve is
* updated; otherwise, just move the knots silently (used in batch moves).
*/
static void sp_node_update_handles(Inkscape::NodePath::Node *node, bool fire_move_signals)
{
g_assert(node != NULL);
if (!SP_KNOT_IS_VISIBLE(node->knot)) {
sp_knot_show(node->knot);
}
if (node->knot->pos != node->pos) { // visible knot is in a different position, need to update
if (fire_move_signals)
sp_knot_set_position(node->knot, &node->pos, 0);
else
sp_knot_moveto(node->knot, &node->pos);
}
gboolean show_handles = node->selected;
if (node->p.other != NULL) {
if (node->p.other->selected) show_handles = TRUE;
}
if (node->n.other != NULL) {
if (node->n.other->selected) show_handles = TRUE;
}
if (node->subpath->nodepath->show_handles == false)
show_handles = FALSE;
sp_node_update_handle(node, -1, show_handles, fire_move_signals);
sp_node_update_handle(node, 1, show_handles, fire_move_signals);
}
/**
* Call sp_node_update_handles() for all nodes on subpath.
*/
static void sp_nodepath_subpath_update_handles(Inkscape::NodePath::SubPath *subpath)
{
g_assert(subpath != NULL);
for (GList *l = subpath->nodes; l != NULL; l = l->next) {
sp_node_update_handles((Inkscape::NodePath::Node *) l->data);
}
}
/**
* Call sp_nodepath_subpath_update_handles() for all subpaths of nodepath.
*/
static void sp_nodepath_update_handles(Inkscape::NodePath::Path *nodepath)
{
g_assert(nodepath != NULL);
for (GList *l = nodepath->subpaths; l != NULL; l = l->next) {
sp_nodepath_subpath_update_handles((Inkscape::NodePath::SubPath *) l->data);
}
}
void
sp_nodepath_show_handles(bool show)
{
Inkscape::NodePath::Path *nodepath = sp_nodepath_current();
if (nodepath == NULL) return;
nodepath->show_handles = show;
sp_nodepath_update_handles(nodepath);
}
/**
* 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);
}
}
sp_nodepath_update_repr(nodepath, _("Align nodes"));
}
/// 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;
}
sp_nodepath_update_repr(nodepath, _("Distribute nodes"));
}
/**
* 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;
int n_added = 0;
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);
n_added ++;
nl = g_list_remove(nl, t);
}
/** \todo fixme: adjust ? */
sp_nodepath_update_handles(nodepath);
if (n_added > 1) {
sp_nodepath_update_repr(nodepath, _("Add nodes"));
} else if (n_added > 0) {
sp_nodepath_update_repr(nodepath, _("Add node"));
}
sp_nodepath_update_statusbar(nodepath);
}
/**
* Select segment nearest to point
*/
void
sp_nodepath_select_segment_near_point(Inkscape::NodePath::Path *nodepath, NR::Point p, bool toggle)
{
if (!nodepath) {
return;
}
Path::cut_position position = get_nearest_position_on_Path(nodepath->livarot_path, 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 || e->p.other->selected))) {
force = TRUE;
}
sp_nodepath_node_select(e, (gboolean) toggle, force);
if (e->p.other)
sp_nodepath_node_select(e->p.other, TRUE, force);
sp_nodepath_update_handles(nodepath);
sp_nodepath_update_statusbar(nodepath);
}
/**
* Add a node nearest to point
*/
void
sp_nodepath_add_node_near_point(Inkscape::NodePath::Path *nodepath, NR::Point p)
{
if (!nodepath) {
return;
}
Path::cut_position position = get_nearest_position_on_Path(nodepath->livarot_path, 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_update_handles(nodepath);
sp_nodepath_update_repr(nodepath, _("Add node"));
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)
{
/* 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 handles of adjacent nodes where necessary
sp_node_adjust_handle(e,1);
sp_node_adjust_handle(e->p.other,-1);
sp_nodepath_update_handles(e->subpath->nodepath);
update_object(e->subpath->nodepath);
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_update_handles(nodepath);
sp_nodepath_update_repr(nodepath, _("Break path"));
}
/**
* 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_update_handles(nodepath);
sp_nodepath_update_repr(nodepath, _("Duplicate node"));
}
/**
* 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;
if (a->knot && SP_KNOT_IS_MOUSEOVER(a->knot)) {
c = a->pos;
} else if (b->knot && SP_KNOT_IS_MOUSEOVER(b->knot)) {
c = b->pos;
} else {
c = (a->pos + b->pos) / 2;
}
if (a->subpath == b->subpath) {
Inkscape::NodePath::SubPath *sp = a->subpath;
sp_nodepath_subpath_close(sp);
sp_node_moveto (sp->first, c);
sp_nodepath_update_handles(sp->nodepath);
sp_nodepath_update_repr(nodepath, _("Close subpath"));
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_update_handles(sa->nodepath);
sp_nodepath_update_repr(nodepath, _("Join nodes"));
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_handle_mirror_p_to_n(sp->last);
sp_node_handle_mirror_n_to_p(sp->first);
sp->first->code = sp->last->code;
sp->first = sp->last;
sp_nodepath_update_handles(sp->nodepath);
sp_nodepath_update_repr(nodepath, _("Close subpath by segment"));
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_handle_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_handle_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_handle_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_handle_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_update_handles(sa->nodepath);
sp_nodepath_update_repr(nodepath, _("Join nodes by segment"));
}
/**
* Delete one or more selected nodes and preserve the shape of the path as much as possible.
*/
void sp_node_delete_preserve(GList *nodes_to_delete)
{
GSList *nodepaths = NULL;
while (nodes_to_delete) {
Inkscape::NodePath::Node *node = (Inkscape::NodePath::Node*) g_list_first(nodes_to_delete)->data;
Inkscape::NodePath::SubPath *sp = node->subpath;
Inkscape::NodePath::Path *nodepath = sp->nodepath;
Inkscape::NodePath::Node *sample_cursor = NULL;
Inkscape::NodePath::Node *sample_end = NULL;
Inkscape::NodePath::Node *delete_cursor = node;
bool just_delete = false;
//find the start of this contiguous selection
//move left to the first node that is not selected
//or the start of the non-closed path
for (Inkscape::NodePath::Node *curr=node->p.other; curr && curr!=node && g_list_find(nodes_to_delete, curr); curr=curr->p.other) {
delete_cursor = curr;
}
//just delete at the beginning of an open path
if (!delete_cursor->p.other) {
sample_cursor = delete_cursor;
just_delete = true;
} else {
sample_cursor = delete_cursor->p.other;
}
//calculate points for each segment
int rate = 5;
float period = 1.0 / rate;
std::vector<NR::Point> data;
if (!just_delete) {
data.push_back(sample_cursor->pos);
for (Inkscape::NodePath::Node *curr=sample_cursor; curr; curr=curr->n.other) {
//just delete at the end of an open path
if (!sp->closed && curr->n.other == sp->last) {
just_delete = true;
break;
}
//sample points on the contiguous selected segment
NR::Point *bez;
bez = new NR::Point [4];
bez[0] = curr->pos;
bez[1] = curr->n.pos;
bez[2] = curr->n.other->p.pos;
bez[3] = curr->n.other->pos;
for (int i=1; i<rate; i++) {
gdouble t = i * period;
NR::Point p = bezier_pt(3, bez, t);
data.push_back(p);
}
data.push_back(curr->n.other->pos);
sample_end = curr->n.other;
//break if we've come full circle or hit the end of the selection
if (!g_list_find(nodes_to_delete, curr->n.other) || curr->n.other==sample_cursor) {
break;
}
}
}
if (!just_delete) {
//calculate the best fitting single segment and adjust the endpoints
NR::Point *adata;
adata = new NR::Point [data.size()];
copy(data.begin(), data.end(), adata);
NR::Point *bez;
bez = new NR::Point [4];
//would decreasing error create a better fitting approximation?
gdouble error = 1.0;
gint ret;
ret = sp_bezier_fit_cubic (bez, adata, data.size(), error);
//if these nodes are smooth or symmetrical, the endpoints will be thrown out of sync.
//make sure these nodes are changed to cusp nodes so that, once the endpoints are moved,
//the resulting nodes behave as expected.
sp_nodepath_convert_node_type(sample_cursor, Inkscape::NodePath::NODE_CUSP);
sp_nodepath_convert_node_type(sample_end, Inkscape::NodePath::NODE_CUSP);
//adjust endpoints
sample_cursor->n.pos = bez[1];
sample_end->p.pos = bez[2];
}
//destroy this contiguous selection
while (delete_cursor && g_list_find(nodes_to_delete, delete_cursor)) {
Inkscape::NodePath::Node *temp = delete_cursor;
if (delete_cursor->n.other == delete_cursor) {
// delete_cursor->n points to itself, which means this is the last node on a closed subpath
delete_cursor = NULL;
} else {
delete_cursor = delete_cursor->n.other;
}
nodes_to_delete = g_list_remove(nodes_to_delete, temp);
sp_nodepath_node_destroy(temp);
}
sp_nodepath_update_handles(nodepath);
if (!g_slist_find(nodepaths, nodepath))
nodepaths = g_slist_prepend (nodepaths, nodepath);
}
for (GSList *i = nodepaths; i; i = i->next) {
// FIXME: when/if we teach node tool to have more than one nodepath, deleting nodes from
// different nodepaths will give us one undo event per nodepath
Inkscape::NodePath::Path *nodepath = (Inkscape::NodePath::Path *) i->data;
// if the entire nodepath is removed, delete the selected object.
if (nodepath->subpaths == NULL ||
//FIXME: a closed path CAN legally have one node, it's only an open one which must be
//at least 2
sp_nodepath_get_node_count(nodepath) < 2) {
SPDocument *document = sp_desktop_document (nodepath->desktop);
//FIXME: The following line will be wrong when we have mltiple nodepaths: we only want to
//delete this nodepath's object, not the entire selection! (though at this time, this
//does not matter)
sp_selection_delete();
sp_document_done (document, SP_VERB_CONTEXT_NODE,
_("Delete nodes"));
} else {
sp_nodepath_update_repr(nodepath, _("Delete nodes preserving shape"));
sp_nodepath_update_statusbar(nodepath);
}
}
g_slist_free (nodepaths);
}
/**
* 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_update_handles(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_desktop_document (nodepath->desktop);
sp_selection_delete();
sp_document_done (document, SP_VERB_CONTEXT_NODE,
_("Delete nodes"));
return;
}
sp_nodepath_update_repr(nodepath, _("Delete nodes"));
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_update_handles(nodepath);
sp_nodepath_update_repr(nodepath, _("Delete segment"));
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);
}
}
sp_nodepath_update_repr(nodepath, _("Change segment type"));
}
/**
* 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);
}
sp_nodepath_update_repr(nodepath, _("Change node type"));
}
/**
* 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) {
node->knot->setSize ((node->type == Inkscape::NodePath::NODE_CUSP) ? 11 : 9);
node->knot->setFill(NODE_FILL_SEL, NODE_FILL_SEL_HI, NODE_FILL_SEL_HI);
node->knot->setStroke(NODE_STROKE_SEL, NODE_STROKE_SEL_HI, NODE_STROKE_SEL_HI);
sp_knot_update_ctrl(node->knot);
} else {
node->knot->setSize ((node->type == Inkscape::NodePath::NODE_CUSP) ? 9 : 7);
node->knot->setFill(NODE_FILL, NODE_FILL_HI, NODE_FILL_HI);
node->knot->setStroke(NODE_STROKE, NODE_STROKE_HI, NODE_STROKE_HI);
sp_knot_update_ctrl(node->knot);
}
sp_node_update_handles(node);
if (node->n.other) sp_node_update_handles(node->n.other);
if (node->p.other) sp_node_update_handles(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_prepend(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_prepend(nodepath->selected, node);
}
sp_node_set_selected(node, !node->selected);
}
} else {
sp_nodepath_deselect(nodepath);
nodepath->selected = g_list_prepend(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);
}
}
}
}
void
nodepath_grow_selection_linearly (Inkscape::NodePath::Path *nodepath, Inkscape::NodePath::Node *n, int grow)
{
g_assert (n);
g_assert (nodepath);
g_assert (n->subpath->nodepath == nodepath);
if (g_list_length (nodepath->selected) == 0) {
if (grow > 0) {
sp_nodepath_node_select(n, TRUE, TRUE);
}
return;
}
if (g_list_length (nodepath->selected) == 1) {
if (grow < 0) {
sp_nodepath_deselect (nodepath);
return;
}
}
double n_sel_range = 0, p_sel_range = 0;
Inkscape::NodePath::Node *farthest_n_node = n;
Inkscape::NodePath::Node *farthest_p_node = n;
// Calculate ranges
{
double n_range = 0, p_range = 0;
bool n_going = true, p_going = true;
Inkscape::NodePath::Node *n_node = n;
Inkscape::NodePath::Node *p_node = n;
do {
// Do one step in both directions from n, until reaching the end of subpath or bumping into each other
if (n_node && n_going)
n_node = n_node->n.other;
if (n_node == NULL) {
n_going = false;
} else {
n_range += bezier_length (n_node->p.other->pos, n_node->p.other->n.pos, n_node->p.pos, n_node->pos);
if (n_node->selected) {
n_sel_range = n_range;
farthest_n_node = n_node;
}
if (n_node == p_node) {
n_going = false;
p_going = false;
}
}
if (p_node && p_going)
p_node = p_node->p.other;
if (p_node == NULL) {
p_going = false;
} else {
p_range += bezier_length (p_node->n.other->pos, p_node->n.other->p.pos, p_node->n.pos, p_node->pos);
if (p_node->selected) {
p_sel_range = p_range;
farthest_p_node = p_node;
}
if (p_node == n_node) {
n_going = false;
p_going = false;
}
}
} while (n_going || p_going);
}
if (grow > 0) {
if (n_sel_range < p_sel_range && farthest_n_node && farthest_n_node->n.other && !(farthest_n_node->n.other->selected)) {
sp_nodepath_node_select(farthest_n_node->n.other, TRUE, TRUE);
} else if (farthest_p_node && farthest_p_node->p.other && !(farthest_p_node->p.other->selected)) {
sp_nodepath_node_select(farthest_p_node->p.other, TRUE, TRUE);
}
} else {
if (n_sel_range > p_sel_range && farthest_n_node && farthest_n_node->selected) {
sp_nodepath_node_select(farthest_n_node, TRUE, FALSE);
} else if (farthest_p_node && farthest_p_node->selected) {
sp_nodepath_node_select(farthest_p_node, TRUE, FALSE);
}
}
}
void
nodepath_grow_selection_spatially (Inkscape::NodePath::Path *nodepath, Inkscape::NodePath::Node *n, int grow)
{
g_assert (n);
g_assert (nodepath);
g_assert (n->subpath->nodepath == nodepath);
if (g_list_length (nodepath->selected) == 0) {
if (grow > 0) {
sp_nodepath_node_select(n, TRUE, TRUE);
}
return;
}
if (g_list_length (nodepath->selected) == 1) {
if (grow < 0) {
sp_nodepath_deselect (nodepath);
return;
}
}
Inkscape::NodePath::Node *farthest_selected = NULL;
double farthest_dist = 0;
Inkscape::NodePath::Node *closest_unselected = NULL;
double closest_dist = NR_HUGE;
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 (node == n)
continue;
if (node->selected) {
if (NR::L2(node->pos - n->pos) > farthest_dist) {
farthest_dist = NR::L2(node->pos - n->pos);
farthest_selected = node;
}
} else {
if (NR::L2(node->pos - n->pos) < closest_dist) {
closest_dist = NR::L2(node->pos - n->pos);
closest_unselected = node;
}
}
}
}
if (grow > 0) {
if (closest_unselected) {
sp_nodepath_node_select(closest_unselected, TRUE, TRUE);
}
} else {
if (farthest_selected) {
sp_nodepath_node_select(farthest_selected, TRUE, FALSE);
}
}
}
/**
\brief Saves all nodes' and handles' current positions in their origin members
*/
void
sp_nodepath_remember_origins(Inkscape::NodePath::Path *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 *n = (Inkscape::NodePath::Node *) nl->data;
n->origin = n->pos;
n->p.origin = n->p.pos;
n->n.origin = n->n.pos;
}
}
}
/**
\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 handle according to node type and line code.
*/
static void sp_node_adjust_handle(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;
return;
}
if (node->type == Inkscape::NodePath::NODE_SYMM) {
me->pos = 2 * node->pos - other->pos;
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;
}
/**
\brief Adjusts both handles according to node type and line code
*/
static void sp_node_adjust_handles(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_handle(node, 1);
return;
}
if (node->n.other->code == NR_LINETO) {
if (node->code == NR_LINETO) return;
sp_node_adjust_handle(node, -1);
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;
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;
}
/**
* Node event 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;
case GDK_Page_Up:
if (event->key.state & GDK_CONTROL_MASK) {
nodepath_grow_selection_spatially (n->subpath->nodepath, n, +1);
} else {
nodepath_grow_selection_linearly (n->subpath->nodepath, n, +1);
}
break;
case GDK_Page_Down:
if (event->key.state & GDK_CONTROL_MASK) {
nodepath_grow_selection_spatially (n->subpath->nodepath, n, -1);
} else {
nodepath_grow_selection_linearly (n->subpath->nodepath, n, -1);
}
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);
sp_nodepath_update_repr(np, _("Delete node"));
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);
}
sp_nodepath_update_repr(nodepath, _("Change node type"));
sp_nodepath_update_statusbar(nodepath);
} else { //ctrl+alt+click: delete node
GList *node_to_delete = NULL;
node_to_delete = g_list_append(node_to_delete, n);
sp_node_delete_preserve(node_to_delete);
}
} 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;
if (!n->selected) {
sp_nodepath_node_select(n, (state & GDK_SHIFT_MASK), FALSE);
}
sp_nodepath_remember_origins (n->subpath->nodepath);
}
/**
* 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;
sp_nodepath_update_repr(n->subpath->nodepath, _("Move nodes"));
}
/**
* 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);
}
// knots might not be created yet!
sp_node_ensure_knot_exists (n->subpath->nodepath->desktop, n, n->dragging_out);
sp_node_ensure_knot_exists (n->subpath->nodepath->desktop, n, opposite);
}
// pass this on to the handle-moved callback
node_handle_moved(n->dragging_out->knot, &mouse, state, (gpointer) n);
sp_node_update_handles(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->origin[NR::Y] - n->origin[NR::Y]; // use origin because otherwise the direction will change as you drag
xn = n->n.other->origin[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->origin[NR::Y] - n->origin[NR::Y];
xp = n->p.other->origin[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 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;
// 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
if (state & GDK_MOD1_MASK) { // sculpt
sp_nodepath_selected_nodes_sculpt(n->subpath->nodepath, n, (*p) - n->origin);
} else {
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_handle_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_update_handles(n);
Inkscape::NodePath::Path *nodepath = n->subpath->nodepath;
sp_nodepath_update_repr(nodepath, _("Retract handle"));
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_handle_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 point of the handle
if (n->p.knot == knot) {
n->p.origin_radial = n->p.pos - n->pos;
} else if (n->n.knot == knot) {
n->n.origin_radial = n->n.pos - n->pos;
} else {
g_assert_not_reached();
}
}
/**
* Node handle ungrabbed callback.
*/
static void node_handle_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_radial.a = 0;
sp_knot_set_position(knot, &n->p.pos, state);
} else if (n->n.knot == knot) {
n->n.origin_radial.a = 0;
sp_knot_set_position(knot, &n->n.pos, state);
} else {
g_assert_not_reached();
}
sp_nodepath_update_repr(n->subpath->nodepath, _("Move node handle"));
}
/**
* Node handle "request" signal callback.
*/
static gboolean node_handle_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->snap_manager;
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, Inkscape::Snapper::ConstraintLine(*p, ndelta), NULL).getPoint();
} else {
*p = m.freeSnap(Inkscape::Snapper::SNAP_POINT, *p, NULL).getPoint();
}
sp_node_adjust_handle(n, -which);
return FALSE;
}
/**
* Node handle moved callback.
*/
static void node_handle_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 handle, its other handle, 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_radial.a == HUGE_VAL) {
// ortho doesn't exist: original handle 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_radial.a + floor((rnew.a - me->origin_radial.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_radial.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&#176;, 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_handle_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);
}
// this function is only called from sp_nodepath_selected_nodes_rotate that will update display at the end,
// so here we just move all the knots without emitting move signals, for speed
sp_node_update_handles(n, false);
}
/**
* 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_update_handles(n, false);
}
}
sp_nodepath_update_repr_keyed(nodepath, angle > 0 ? "nodes:rot:p" : "nodes:rot:n", _("Rotate nodes"));
}
/**
* 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);
}
// this function is only called from sp_nodepath_selected_nodes_scale that will update display at the end,
// so here we just move all the knots without emitting move signals, for speed
sp_node_update_handles(n, false);
}
/**
* 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_update_handles(n, false);
}
}
sp_nodepath_update_repr_keyed(nodepath, grow > 0 ? "nodes:scale:p" : "nodes:scale:n", _("Scale nodes"));
}
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_update_handles(n, false);
} 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_update_handles(n, false);
}
}
sp_nodepath_update_repr(nodepath, _("Flip nodes"));
}
//-----------------------------------------------
/**
* 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;
// using prepend here saves up to 10% of time on paths with many subpaths, but requires that
// the caller reverses the list after it's ready (this is done in sp_nodepath_new)
nodepath->subpaths = 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->last->pos + (sp->first->n.pos - sp->first->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, _("<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"));
sp_knot_set_position(n->knot, pos, 0);
n->knot->setShape ((n->type == Inkscape::NodePath::NODE_CUSP)? SP_KNOT_SHAPE_DIAMOND : SP_KNOT_SHAPE_SQUARE);
n->knot->setSize ((n->type == Inkscape::NodePath::NODE_CUSP)? 9 : 7);
n->knot->setAnchor (GTK_ANCHOR_CENTER);
n->knot->setFill(NODE_FILL, NODE_FILL_HI, NODE_FILL_HI);
n->knot->setStroke(NODE_STROKE, NODE_STROKE_HI, NODE_STROKE_HI);
sp_knot_update_ctrl(n->knot);
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);
// We only create handle knots and lines on demand
n->p.knot = NULL;
n->p.line = NULL;
n->n.knot = NULL;
n->n.line = NULL;
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));
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));
if (node->p.knot)
g_object_unref(G_OBJECT(node->p.knot));
if (node->n.knot)
g_object_unref(G_OBJECT(node->n.knot));
if (node->p.line)
gtk_object_destroy(GTK_OBJECT(node->p.line));
if (node->n.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 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 the other side of the node, given one of its sides.
*/
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 the given 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>Alt+drag</b> nodes to sculpt; <b>arrow</b> keys to move nodes, <b>&lt; &gt;</b> to scale, <b>[ ]</b> to rotate");
gchar const *when_selected_one = _("<b>Drag</b> the node or its handles; <b>arrow</b> keys to move the node");
gint total_nodes = sp_nodepath_get_node_count(nodepath);
gint selected_nodes = sp_nodepath_selection_get_node_count(nodepath);
gint total_subpaths = sp_nodepath_get_subpath_count(nodepath);
gint selected_subpaths = sp_nodepath_selection_get_subpath_count(nodepath);
SPDesktop *desktop = NULL;
if (nodepath) {
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_nodes == 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_nodes),
total_nodes);
} 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_nodes == 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_nodes),
selected_nodes, total_nodes, sp_node_type_description((Inkscape::NodePath::Node *) nodepath->selected->data), when_selected_one);
} else {
if (selected_subpaths > 1) {
mc->setF(Inkscape::NORMAL_MESSAGE,
ngettext("<b>%i</b> of <b>%i</b> node selected in <b>%i</b> of <b>%i</b> subpaths. %s.",
"<b>%i</b> of <b>%i</b> nodes selected in <b>%i</b> of <b>%i</b> subpaths. %s.",
total_nodes),
selected_nodes, total_nodes, selected_subpaths, total_subpaths, when_selected);
} 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_nodes),
selected_nodes, total_nodes, 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 :