src/shape-editor.cpp

   1 #define __SHAPE_EDITOR_CPP__
   2
   3 /*
   4  * Inkscape::ShapeEditor
   5  *
   6  * Authors:
   7  *   bulia byak <buliabyak@users.sf.net>
   8  *
   9  */
  10
  11 #ifdef HAVE_CONFIG_H
  12 #include "config.h"
  13 #endif
  14
  15 #include <string.h>
  16 #include <glibmm/i18n.h>
  17
  18 #include "sp-object.h"
  19 #include "sp-item.h"
  20 #include "live_effects/lpeobject.h"
  21 #include "selection.h"
  22 #include "desktop.h"
  23 #include "desktop-handles.h"
  24 #include "knotholder.h"
  25 #include "live_effects/parameter/pointparam-knotholder.h"
  26 #include "node-context.h"
  27 #include "xml/node-event-vector.h"
  28 #include "prefs-utils.h"
  29 #include "object-edit.h"
  30 #include "splivarot.h"
  31 #include "style.h"
  32
  33 #include "shape-editor.h"
  34
  35
  36 ShapeEditorsCollective::ShapeEditorsCollective(SPDesktop */*dt*/) {
  37 }
  38
  39 ShapeEditorsCollective::~ShapeEditorsCollective() {
  40 }
  41
  42
  43 void ShapeEditorsCollective::update_statusbar() {
  44
  45 //!!! move from nodepath: sp_nodepath_update_statusbar but summing for all nodepaths
  46
  47 }
  48
  49 ShapeEditor::ShapeEditor(SPDesktop *dt) {
  50     this->desktop = dt;
  51     this->grab_node = -1;
  52     this->nodepath = NULL;
  53     this->knotholder = NULL;
  54     this->hit = false;
  55 }
  56
  57 ShapeEditor::~ShapeEditor() {
  58     unset_item();
  59 }
  60
  61 void ShapeEditor::unset_item() {
  62
  63     Inkscape::XML::Node *old_repr = NULL;
  64
  65     if (this->nodepath) {
  66         old_repr = this->nodepath->repr;
  67     }
  68
  69     if (!old_repr && this->knotholder) {
  70         old_repr = this->knotholder->repr;
  71     }
  72
  73     if (old_repr) { // remove old listener
  74         sp_repr_remove_listener_by_data(old_repr, this);
  75         Inkscape::GC::release(old_repr);
  76     }
  77
  78     if (this->nodepath) {
  79         this->grab_node = -1;
  80         sp_nodepath_destroy(this->nodepath);
  81         this->nodepath = NULL;
  82     }
  83
  84     if (this->knotholder) {
  85         delete this->knotholder;
  86         this->knotholder = NULL;
  87     }
  88 }
  89
  90 bool ShapeEditor::has_nodepath () {
  91     return (this->nodepath != NULL);
  92 }
  93
  94 bool ShapeEditor::has_knotholder () {
  95     return (this->knotholder != NULL);
  96 }
  97
  98 bool ShapeEditor::has_local_change () {
  99     return ((this->nodepath && this->nodepath->local_change) ||
 100             (this->knotholder && this->knotholder->local_change != 0));
 101 }
 102
 103 void ShapeEditor::decrement_local_change () {
 104     if (this->nodepath && this->nodepath->local_change > 0) {
 105         this->nodepath->local_change--;
 106     } else if (this->knotholder) {
 107         this->knotholder->local_change = FALSE;
 108     }
 109 }
 110
 111 SPItem *ShapeEditor::get_item () {
 112     SPItem *item = NULL;
 113     if (this->has_nodepath()) {
 114         item = this->nodepath->item;
 115     } else if (this->has_knotholder()) {
 116         item = SP_ITEM(this->knotholder->item);
 117     }
 118     return item;
 119 }
 120
 121 GList *ShapeEditor::save_nodepath_selection () {
 122     if (this->nodepath)
 123         return ::save_nodepath_selection (this->nodepath);
 124     return NULL;
 125 }
 126
 127 void ShapeEditor::restore_nodepath_selection (GList *saved) {
 128     if (this->nodepath && saved)
 129         ::restore_nodepath_selection (this->nodepath, saved);
 130 }
 131
 132 bool ShapeEditor::nodepath_edits_repr_key(gchar const *name) {
 133     if (nodepath && name) {
 134         return ( !strcmp(name, nodepath->repr_key) || !strcmp(name, nodepath->repr_nodetypes_key) );
 135     }
 136
 137     return false;
 138 }
 139
 140 static void shapeeditor_event_attr_changed(Inkscape::XML::Node */*repr*/, gchar const *name,
 141                                            gchar const */*old_value*/, gchar const */*new_value*/,
 142                                            bool /*is_interactive*/, gpointer data)
 143 {
 144     gboolean changed = FALSE;
 145
 146     g_assert(data);
 147     ShapeEditor *sh = ((ShapeEditor *) data);
 148
 149     if ( sh->has_knotholder() || ( sh->has_nodepath() && sh->nodepath_edits_repr_key(name) ) )
 150     {
 151         changed = !sh->has_local_change();
 152         sh->decrement_local_change();
 153     }
 154
 155     if (changed) {
 156         GList *saved = NULL;
 157         if (sh->has_nodepath()) {
 158             saved = sh->save_nodepath_selection();
 159         }
 160
 161         sh->reset_item ();
 162
 163         if (sh->has_nodepath() && saved) {
 164             sh->restore_nodepath_selection(saved);
 165             g_list_free (saved);
 166         }
 167     }
 168
 169     sh->update_statusbar(); //TODO: sh->get_container()->update_statusbar();
 170 }
 171
 172 static Inkscape::XML::NodeEventVector shapeeditor_repr_events = {
 173     NULL, /* child_added */
 174     NULL, /* child_removed */
 175     shapeeditor_event_attr_changed,
 176     NULL, /* content_changed */
 177     NULL  /* order_changed */
 178 };
 179
 180
 181 void ShapeEditor::set_item(SPItem *item) {
 182
 183     unset_item();
 184
 185     this->grab_node = -1;
 186
 187     if (item) {
 188         if (SP_IS_LPE_ITEM(item)) {
 189             SPLPEItem *lpeitem = SP_LPE_ITEM(item);
 190             Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(lpeitem);
 191             if (!(lpe && lpe->isVisible() && lpe->providesKnotholder())) {
 192                 // only create nodepath if the item either doesn't have an LPE
 193                 // or the LPE is invisible or it doesn't provide a knotholder itself
 194                 this->nodepath = sp_nodepath_new(desktop, item,
 195                                                  (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0));
 196             } else if (lpe && lpe->isVisible()) {
 197                 sp_lpe_item_add_temporary_canvasitems(lpeitem, desktop);
 198             }
 199         }
 200
 201         if (this->nodepath) {
 202             this->nodepath->shape_editor = this;
 203         }
 204         this->knotholder = sp_item_knot_holder(item, desktop);
 205
 206         if (this->nodepath || this->knotholder) {
 207             // setting new listener
 208             Inkscape::XML::Node *repr;
 209             if (this->knotholder)
 210                 repr = this->knotholder->repr;
 211             else
 212                 repr = SP_OBJECT_REPR(item);
 213             if (repr) {
 214                 Inkscape::GC::anchor(repr);
 215                 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
 216             }
 217         }
 218     }
 219 }
 220
 221 /** Please note that this function only works for path parameters.
 222 *  All other parameters probably will crash Inkscape!
 223 */
 224 void ShapeEditor::set_item_lpe_path_parameter(SPItem *item, SPObject *lpeobject, const char * key)
 225 {
 226     unset_item();
 227
 228     this->grab_node = -1;
 229
 230     if (lpeobject) {
 231         this->nodepath = sp_nodepath_new( desktop, lpeobject,
 232                                           (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0),
 233                                           key, item);
 234         if (this->nodepath) {
 235             this->nodepath->shape_editor = this;
 236
 237             // setting new listener
 238             Inkscape::XML::Node *repr = SP_OBJECT_REPR(lpeobject);
 239             if (repr) {
 240                 Inkscape::GC::anchor(repr);
 241                 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
 242             }
 243         }
 244     }
 245 }
 246
 247 /**
 248 *  pass a new knotholder to ShapeEditor to manage (and delete)
 249 */
 250 void
 251 ShapeEditor::set_knotholder(KnotHolder * knot_holder)
 252 {
 253     unset_item();
 254
 255     this->grab_node = -1;
 256
 257     if (knot_holder) {
 258         this->knotholder = knot_holder;
 259     }
 260 }
 261
 262
 263 /** FIXME: think about this. Is this thing only called when the item needs to be updated?
 264    Why not make a reload function in NodePath and in KnotHolder? */
 265 void ShapeEditor::reset_item ()
 266 {
 267     if ( (this->nodepath) && (IS_LIVEPATHEFFECT(this->nodepath->object)) ) {
 268         SPItem * item = this->nodepath->item;
 269         SPObject *obj = this->nodepath->object;
 270         char * key = g_strdup(this->nodepath->repr_key);
 271         set_item_lpe_path_parameter(item, obj, key); // the above checks for nodepath, so it is indeed a path that we are editing
 272         g_free(key);
 273     } else {
 274         SPItem * item = get_item();
 275         set_item(item);
 276     }
 277 }
 278
 279 void ShapeEditor::nodepath_destroyed () {
 280     this->nodepath = NULL;
 281 }
 282
 283 void ShapeEditor::update_statusbar () {
 284     if (this->nodepath)
 285         sp_nodepath_update_statusbar(this->nodepath);
 286 }
 287
 288 bool ShapeEditor::is_over_stroke (NR::Point event_p, bool remember) {
 289
 290     if (!this->nodepath)
 291         return false; // no stroke in knotholder
 292
 293     SPItem *item = get_item();
 294
 295     //Translate click point into proper coord system
 296     this->curvepoint_doc = desktop->w2d(event_p);
 297     this->curvepoint_doc *= from_2geom(sp_item_dt2i_affine(item));
 298
 299     sp_nodepath_ensure_livarot_path(this->nodepath);
 300
 301     NR::Maybe<Path::cut_position> position = get_nearest_position_on_Path(this->nodepath->livarot_path, this->curvepoint_doc);
 302     if (!position) {
 303         return false;
 304     }
 305
 306     NR::Point nearest = get_point_on_Path(this->nodepath->livarot_path, position->piece, position->t);
 307     NR::Point delta = nearest - this->curvepoint_doc;
 308
 309     delta = desktop->d2w(delta);
 310
 311     double stroke_tolerance =
 312         (( !SP_OBJECT_STYLE(item)->stroke.isNone() ?
 313            desktop->current_zoom() *
 314            SP_OBJECT_STYLE (item)->stroke_width.computed * 0.5 *
 315            NR::expansion(from_2geom(sp_item_i2d_affine(item)))
 316          : 0.0)
 317          + prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100)) /NR::expansion(from_2geom(sp_item_i2d_affine(item)));
 318     bool close = (NR::L2 (delta) < stroke_tolerance);
 319
 320     if (remember && close) {
 321         this->curvepoint_event[NR::X] = (gint) event_p [NR::X];
 322         this->curvepoint_event[NR::Y] = (gint) event_p [NR::Y];
 323         this->hit = true;
 324         this->grab_t = position->t;
 325         this->grab_node = position->piece;
 326     }
 327
 328     return close;
 329 }
 330
 331 void ShapeEditor::add_node_near_point() {
 332     if (this->nodepath) {
 333         sp_nodepath_add_node_near_point(this->nodepath, this->curvepoint_doc);
 334     } else if (this->knotholder) {
 335         // we do not add nodes in knotholder... yet
 336     }
 337 }
 338
 339 void ShapeEditor::select_segment_near_point(bool toggle) {
 340     if (this->nodepath) {
 341         sp_nodepath_select_segment_near_point(this->nodepath, this->curvepoint_doc, toggle);
 342     } else if (this->knotholder) {
 343         // we do not select segments in knotholder... yet?
 344     }
 345 }
 346
 347 void ShapeEditor::cancel_hit() {
 348     this->hit = false;
 349 }
 350
 351 bool ShapeEditor::hits_curve() {
 352     return (this->hit);
 353 }
 354
 355
 356 void ShapeEditor::curve_drag(gdouble eventx, gdouble eventy) {
 357     if (this->nodepath && !this->nodepath->straight_path) {
 358
 359         if (this->grab_node == -1) // don't know which segment to drag
 360             return;
 361
 362         // We round off the extra precision in the motion coordinates provided
 363         // by some input devices (like tablets). As we'll store the coordinates
 364         // as integers in curvepoint_event we need to do this rounding before
 365         // comparing them with the last coordinates from curvepoint_event.
 366         // See bug #1593499 for details.
 367
 368         gint x = (gint) Inkscape::round(eventx);
 369         gint y = (gint) Inkscape::round(eventy);
 370
 371
 372         // The coordinates hasn't changed since the last motion event, abort
 373         if (this->curvepoint_event[NR::X] == x &&
 374             this->curvepoint_event[NR::Y] == y)
 375             return;
 376
 377         NR::Point const delta_w(eventx - this->curvepoint_event[NR::X],
 378                                 eventy - this->curvepoint_event[NR::Y]);
 379         NR::Point const delta_dt(this->desktop->w2d(delta_w));
 380
 381         sp_nodepath_curve_drag (this->grab_node, this->grab_t, delta_dt); //!!! FIXME: which nodepath?!!! also uses current!!!
 382         this->curvepoint_event[NR::X] = x;
 383         this->curvepoint_event[NR::Y] = y;
 384
 385     } else if (this->knotholder) {
 386         // we do not drag curve in knotholder
 387     }
 388
 389 }
 390
 391 void ShapeEditor::finish_drag() {
 392     if (this->nodepath && this->hit) {
 393         sp_nodepath_update_repr (this->nodepath, _("Drag curve"));
 394     }
 395 }
 396
 397 void ShapeEditor::select_rect(NR::Rect const &rect, bool add) {
 398     if (this->nodepath) {
 399         sp_nodepath_select_rect(this->nodepath, rect, add);
 400     }
 401 }
 402
 403 bool ShapeEditor::has_selection() {
 404     if (this->nodepath)
 405         return this->nodepath->selected;
 406     return false; //  so far, knotholder cannot have selection
 407 }
 408
 409 void ShapeEditor::deselect() {
 410     if (this->nodepath)
 411         sp_nodepath_deselect(this->nodepath);
 412 }
 413
 414 void ShapeEditor::add_node () {
 415     sp_node_selected_add_node(this->nodepath);
 416 }
 417
 418 void ShapeEditor::delete_nodes () {
 419     sp_node_selected_delete(this->nodepath);
 420 }
 421
 422 void ShapeEditor::delete_nodes_preserving_shape () {
 423     if (this->nodepath && this->nodepath->selected) {
 424         sp_node_delete_preserve(g_list_copy(this->nodepath->selected));
 425     }
 426 }
 427
 428 void ShapeEditor::delete_segment () {
 429     sp_node_selected_delete_segment(this->nodepath);
 430 }
 431
 432 void ShapeEditor::set_node_type(int type) {
 433     sp_node_selected_set_type(this->nodepath, (Inkscape::NodePath::NodeType) type);
 434 }
 435
 436 void ShapeEditor::break_at_nodes() {
 437     sp_node_selected_break(this->nodepath);
 438 }
 439
 440 void ShapeEditor::join_nodes() {
 441     sp_node_selected_join(this->nodepath);
 442 }
 443
 444 void ShapeEditor::join_segments() {
 445     sp_node_selected_join_segment(this->nodepath);
 446 }
 447
 448 void ShapeEditor::duplicate_nodes() {
 449     sp_node_selected_duplicate(this->nodepath);
 450 }
 451
 452 void ShapeEditor::set_type_of_segments(NRPathcode code) {
 453     sp_node_selected_set_line_type(this->nodepath, code);
 454 }
 455
 456 void ShapeEditor::move_nodes_screen(gdouble dx, gdouble dy) {
 457     sp_node_selected_move_screen(this->nodepath, dx, dy);
 458 }
 459 void ShapeEditor::move_nodes(gdouble dx, gdouble dy) {
 460     sp_node_selected_move(this->nodepath, dx, dy);
 461 }
 462
 463 void ShapeEditor::rotate_nodes(gdouble angle, int which, bool screen) {
 464     if (this->nodepath)
 465         sp_nodepath_selected_nodes_rotate (this->nodepath, angle, which, screen);
 466 }
 467
 468 void ShapeEditor::scale_nodes(gdouble const grow, int const which) {
 469     sp_nodepath_selected_nodes_scale(this->nodepath, grow, which);
 470 }
 471 void ShapeEditor::scale_nodes_screen(gdouble const grow, int const which) {
 472     sp_nodepath_selected_nodes_scale_screen(this->nodepath, grow, which);
 473 }
 474
 475 void ShapeEditor::select_all (bool invert) {
 476     if (this->nodepath)
 477         sp_nodepath_select_all (this->nodepath, invert);
 478 }
 479 void ShapeEditor::select_all_from_subpath (bool invert) {
 480     if (this->nodepath)
 481         sp_nodepath_select_all_from_subpath (this->nodepath, invert);
 482 }
 483 void ShapeEditor::select_next () {
 484     if (this->nodepath) {
 485         sp_nodepath_select_next (this->nodepath);
 486         if (this->nodepath->numSelected() >= 1) {
 487             this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
 488         }
 489     }
 490 }
 491 void ShapeEditor::select_prev () {
 492     if (this->nodepath) {
 493         sp_nodepath_select_prev (this->nodepath);
 494         if (this->nodepath->numSelected() >= 1) {
 495             this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
 496         }
 497     }
 498 }
 499
 500 void ShapeEditor::show_handles (bool show) {
 501     if (this->nodepath && !this->nodepath->straight_path)
 502         sp_nodepath_show_handles (this->nodepath, show);
 503 }
 504
 505 void ShapeEditor::show_helperpath (bool show) {
 506     if (this->nodepath)
 507         sp_nodepath_show_helperpath (this->nodepath, show);
 508 }
 509
 510 void ShapeEditor::flip (NR::Dim2 axis, NR::Maybe<NR::Point> center) {
 511     if (this->nodepath)
 512         sp_nodepath_flip (this->nodepath, axis, center);
 513 }
 514
 515 void ShapeEditor::distribute (NR::Dim2 axis) {
 516     if (this->nodepath)
 517         sp_nodepath_selected_distribute (this->nodepath, axis);
 518 }
 519 void ShapeEditor::align (NR::Dim2 axis) {
 520     if (this->nodepath)
 521         sp_nodepath_selected_align (this->nodepath, axis);
 522 }
 523
 524
 525 /*
 526   Local Variables:
 527   mode:c++
 528   c-file-style:"stroustrup"
 529   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 530   indent-tabs-mode:nil
 531   fill-column:99
 532   End:
 533 */
 534 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :