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     if (this->nodepath)
 100         return (this->nodepath->local_change != 0);
 101     else if (this->knotholder)
 102         return (this->knotholder->local_change != 0);
 103     else
 104         return false;
 105 }
 106
 107 void ShapeEditor::decrement_local_change () {
 108     if (this->nodepath) {
 109         if (this->nodepath->local_change > 0)
 110             this->nodepath->local_change--;
 111     } else if (this->knotholder) {
 112         this->knotholder->local_change = FALSE;
 113     }
 114 }
 115
 116 SPItem *ShapeEditor::get_item () {
 117     SPItem *item = NULL;
 118     if (this->has_nodepath()) {
 119         item = this->nodepath->item;
 120     } else if (this->has_knotholder()) {
 121         item = SP_ITEM(this->knotholder->item);
 122     }
 123     return item;
 124 }
 125
 126 GList *ShapeEditor::save_nodepath_selection () {
 127     if (this->nodepath)
 128         return ::save_nodepath_selection (this->nodepath);
 129     return NULL;
 130 }
 131
 132 void ShapeEditor::restore_nodepath_selection (GList *saved) {
 133     if (this->nodepath && saved)
 134         ::restore_nodepath_selection (this->nodepath, saved);
 135 }
 136
 137 bool ShapeEditor::nodepath_edits_repr_key(gchar const *name) {
 138     if (nodepath && name) {
 139         return ( !strcmp(name, nodepath->repr_key) || !strcmp(name, nodepath->repr_nodetypes_key) );
 140     }
 141
 142     return false;
 143 }
 144
 145 static void shapeeditor_event_attr_changed(Inkscape::XML::Node */*repr*/, gchar const *name,
 146                                            gchar const */*old_value*/, gchar const */*new_value*/,
 147                                            bool /*is_interactive*/, gpointer data)
 148 {
 149     gboolean changed = FALSE;
 150
 151     g_assert(data);
 152     ShapeEditor *sh = ((ShapeEditor *) data);
 153
 154     if ( sh->has_knotholder() || ( sh->has_nodepath() && sh->nodepath_edits_repr_key(name) ) )
 155     {
 156         changed = !sh->has_local_change();
 157         sh->decrement_local_change();
 158     }
 159
 160     if (changed) {
 161         GList *saved = NULL;
 162         if (sh->has_nodepath()) {
 163             saved = sh->save_nodepath_selection();
 164         }
 165
 166         sh->reset_item ();
 167
 168         if (sh->has_nodepath() && saved) {
 169             sh->restore_nodepath_selection(saved);
 170             g_list_free (saved);
 171         }
 172     }
 173
 174     sh->update_statusbar(); //TODO: sh->get_container()->update_statusbar();
 175 }
 176
 177 static Inkscape::XML::NodeEventVector shapeeditor_repr_events = {
 178     NULL, /* child_added */
 179     NULL, /* child_removed */
 180     shapeeditor_event_attr_changed,
 181     NULL, /* content_changed */
 182     NULL  /* order_changed */
 183 };
 184
 185
 186 void ShapeEditor::set_item(SPItem *item) {
 187
 188     unset_item();
 189
 190     this->grab_node = -1;
 191
 192     if (item) {
 193         if (SP_IS_LPE_ITEM(item)) {
 194             SPLPEItem *lpeitem = SP_LPE_ITEM(item);
 195             Inkscape::LivePathEffect::Effect *lpe = sp_lpe_item_get_current_lpe(lpeitem);
 196             if (!(lpe && lpe->isVisible() && lpe->providesKnotholder())) {
 197                 // only create nodepath if the item either doesn't have an LPE
 198                 // or the LPE is invisible or it doesn't provide a knotholder itself
 199                 this->nodepath = sp_nodepath_new(desktop, item,
 200                                                  (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0));
 201             } else if (lpe && lpe->isVisible() && lpe->showOrigPath()) {
 202                 sp_lpe_item_add_temporary_canvasitems(lpeitem, desktop);
 203             }
 204         }
 205
 206         if (this->nodepath) {
 207             this->nodepath->shape_editor = this;
 208         }
 209         this->knotholder = sp_item_knot_holder(item, desktop);
 210
 211         if (this->nodepath || this->knotholder) {
 212             // setting new listener
 213             Inkscape::XML::Node *repr;
 214             if (this->knotholder)
 215                 repr = this->knotholder->repr;
 216             else
 217                 repr = SP_OBJECT_REPR(item);
 218             if (repr) {
 219                 Inkscape::GC::anchor(repr);
 220                 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
 221             }
 222         }
 223     }
 224 }
 225
 226 /** Please note that this function only works for path parameters.
 227 *  All other parameters probably will crash Inkscape!
 228 */
 229 void ShapeEditor::set_item_lpe_path_parameter(SPItem *item, SPObject *lpeobject, const char * key)
 230 {
 231     unset_item();
 232
 233     this->grab_node = -1;
 234
 235     if (lpeobject) {
 236         this->nodepath = sp_nodepath_new( desktop, lpeobject,
 237                                           (prefs_get_int_attribute("tools.nodes", "show_handles", 1) != 0),
 238                                           key, item);
 239         if (this->nodepath) {
 240             this->nodepath->shape_editor = this;
 241
 242             // setting new listener
 243             Inkscape::XML::Node *repr = SP_OBJECT_REPR(lpeobject);
 244             if (repr) {
 245                 Inkscape::GC::anchor(repr);
 246                 sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
 247             }
 248         }
 249     }
 250 }
 251
 252 /**
 253 *  pass a new knotholder to ShapeEditor to manage (and delete)
 254 */
 255 void
 256 ShapeEditor::set_knotholder(KnotHolder * knot_holder)
 257 {
 258     unset_item();
 259
 260     this->grab_node = -1;
 261
 262     if (knot_holder) {
 263         this->knotholder = knot_holder;
 264     }
 265 }
 266
 267
 268 /** FIXME: think about this. Is this thing only called when the item needs to be updated?
 269    Why not make a reload function in NodePath and in KnotHolder? */
 270 void ShapeEditor::reset_item ()
 271 {
 272     if ( (this->nodepath) && (IS_LIVEPATHEFFECT(this->nodepath->object)) ) {
 273         SPItem * item = this->nodepath->item;
 274         SPObject *obj = this->nodepath->object;
 275         char * key = g_strdup(this->nodepath->repr_key);
 276         set_item_lpe_path_parameter(item, obj, key); // the above checks for nodepath, so it is indeed a path that we are editing
 277         g_free(key);
 278     } else {
 279         SPItem * item = get_item();
 280         set_item(item);
 281     }
 282 }
 283
 284 void ShapeEditor::nodepath_destroyed () {
 285     this->nodepath = NULL;
 286 }
 287
 288 void ShapeEditor::update_statusbar () {
 289     if (this->nodepath)
 290         sp_nodepath_update_statusbar(this->nodepath);
 291 }
 292
 293 bool ShapeEditor::is_over_stroke (NR::Point event_p, bool remember) {
 294
 295     if (!this->nodepath)
 296         return false; // no stroke in knotholder
 297
 298     SPItem *item = get_item();
 299
 300     //Translate click point into proper coord system
 301     this->curvepoint_doc = desktop->w2d(event_p);
 302     this->curvepoint_doc *= from_2geom(sp_item_dt2i_affine(item));
 303
 304     sp_nodepath_ensure_livarot_path(this->nodepath);
 305
 306     NR::Maybe<Path::cut_position> position = get_nearest_position_on_Path(this->nodepath->livarot_path, this->curvepoint_doc);
 307     if (!position) {
 308         return false;
 309     }
 310
 311     NR::Point nearest = get_point_on_Path(this->nodepath->livarot_path, position->piece, position->t);
 312     NR::Point delta = nearest - this->curvepoint_doc;
 313
 314     delta = desktop->d2w(delta);
 315
 316     double stroke_tolerance =
 317         (( !SP_OBJECT_STYLE(item)->stroke.isNone() ?
 318            desktop->current_zoom() *
 319            SP_OBJECT_STYLE (item)->stroke_width.computed * 0.5 *
 320            NR::expansion(from_2geom(sp_item_i2d_affine(item)))
 321          : 0.0)
 322          + prefs_get_int_attribute_limited("options.dragtolerance", "value", 0, 0, 100)) /NR::expansion(from_2geom(sp_item_i2d_affine(item)));
 323     bool close = (NR::L2 (delta) < stroke_tolerance);
 324
 325     if (remember && close) {
 326         this->curvepoint_event[NR::X] = (gint) event_p [NR::X];
 327         this->curvepoint_event[NR::Y] = (gint) event_p [NR::Y];
 328         this->hit = true;
 329         this->grab_t = position->t;
 330         this->grab_node = position->piece;
 331     }
 332
 333     return close;
 334 }
 335
 336 void ShapeEditor::add_node_near_point() {
 337     if (this->nodepath) {
 338         sp_nodepath_add_node_near_point(this->nodepath, this->curvepoint_doc);
 339     } else if (this->knotholder) {
 340         // we do not add nodes in knotholder... yet
 341     }
 342 }
 343
 344 void ShapeEditor::select_segment_near_point(bool toggle) {
 345     if (this->nodepath) {
 346         sp_nodepath_select_segment_near_point(this->nodepath, this->curvepoint_doc, toggle);
 347     } else if (this->knotholder) {
 348         // we do not select segments in knotholder... yet?
 349     }
 350 }
 351
 352 void ShapeEditor::cancel_hit() {
 353     this->hit = false;
 354 }
 355
 356 bool ShapeEditor::hits_curve() {
 357     return (this->hit);
 358 }
 359
 360
 361 void ShapeEditor::curve_drag(gdouble eventx, gdouble eventy) {
 362     if (this->nodepath && !this->nodepath->straight_path) {
 363
 364         if (this->grab_node == -1) // don't know which segment to drag
 365             return;
 366
 367         // We round off the extra precision in the motion coordinates provided
 368         // by some input devices (like tablets). As we'll store the coordinates
 369         // as integers in curvepoint_event we need to do this rounding before
 370         // comparing them with the last coordinates from curvepoint_event.
 371         // See bug #1593499 for details.
 372
 373         gint x = (gint) Inkscape::round(eventx);
 374         gint y = (gint) Inkscape::round(eventy);
 375
 376
 377         // The coordinates hasn't changed since the last motion event, abort
 378         if (this->curvepoint_event[NR::X] == x &&
 379             this->curvepoint_event[NR::Y] == y)
 380             return;
 381
 382         NR::Point const delta_w(eventx - this->curvepoint_event[NR::X],
 383                                 eventy - this->curvepoint_event[NR::Y]);
 384         NR::Point const delta_dt(this->desktop->w2d(delta_w));
 385
 386         sp_nodepath_curve_drag (this->grab_node, this->grab_t, delta_dt); //!!! FIXME: which nodepath?!!! also uses current!!!
 387         this->curvepoint_event[NR::X] = x;
 388         this->curvepoint_event[NR::Y] = y;
 389
 390     } else if (this->knotholder) {
 391         // we do not drag curve in knotholder
 392     }
 393
 394 }
 395
 396 void ShapeEditor::finish_drag() {
 397     if (this->nodepath && this->hit) {
 398         sp_nodepath_update_repr (this->nodepath, _("Drag curve"));
 399     }
 400 }
 401
 402 void ShapeEditor::select_rect(NR::Rect const &rect, bool add) {
 403     if (this->nodepath) {
 404         sp_nodepath_select_rect(this->nodepath, rect, add);
 405     }
 406 }
 407
 408 bool ShapeEditor::has_selection() {
 409     if (this->nodepath)
 410         return this->nodepath->selected;
 411     return false; //  so far, knotholder cannot have selection
 412 }
 413
 414 void ShapeEditor::deselect() {
 415     if (this->nodepath)
 416         sp_nodepath_deselect(this->nodepath);
 417 }
 418
 419 void ShapeEditor::add_node () {
 420     sp_node_selected_add_node(this->nodepath);
 421 }
 422
 423 void ShapeEditor::delete_nodes () {
 424     sp_node_selected_delete(this->nodepath);
 425 }
 426
 427 void ShapeEditor::delete_nodes_preserving_shape () {
 428     if (this->nodepath && this->nodepath->selected) {
 429         sp_node_delete_preserve(g_list_copy(this->nodepath->selected));
 430     }
 431 }
 432
 433 void ShapeEditor::delete_segment () {
 434     sp_node_selected_delete_segment(this->nodepath);
 435 }
 436
 437 void ShapeEditor::set_node_type(int type) {
 438     sp_node_selected_set_type(this->nodepath, (Inkscape::NodePath::NodeType) type);
 439 }
 440
 441 void ShapeEditor::break_at_nodes() {
 442     sp_node_selected_break(this->nodepath);
 443 }
 444
 445 void ShapeEditor::join_nodes() {
 446     sp_node_selected_join(this->nodepath);
 447 }
 448
 449 void ShapeEditor::join_segments() {
 450     sp_node_selected_join_segment(this->nodepath);
 451 }
 452
 453 void ShapeEditor::duplicate_nodes() {
 454     sp_node_selected_duplicate(this->nodepath);
 455 }
 456
 457 void ShapeEditor::set_type_of_segments(NRPathcode code) {
 458     sp_node_selected_set_line_type(this->nodepath, code);
 459 }
 460
 461 void ShapeEditor::move_nodes_screen(gdouble dx, gdouble dy) {
 462     sp_node_selected_move_screen(this->nodepath, dx, dy);
 463 }
 464 void ShapeEditor::move_nodes(gdouble dx, gdouble dy) {
 465     sp_node_selected_move(this->nodepath, dx, dy);
 466 }
 467
 468 void ShapeEditor::rotate_nodes(gdouble angle, int which, bool screen) {
 469     if (this->nodepath)
 470         sp_nodepath_selected_nodes_rotate (this->nodepath, angle, which, screen);
 471 }
 472
 473 void ShapeEditor::scale_nodes(gdouble const grow, int const which) {
 474     sp_nodepath_selected_nodes_scale(this->nodepath, grow, which);
 475 }
 476 void ShapeEditor::scale_nodes_screen(gdouble const grow, int const which) {
 477     sp_nodepath_selected_nodes_scale_screen(this->nodepath, grow, which);
 478 }
 479
 480 void ShapeEditor::select_all (bool invert) {
 481     if (this->nodepath)
 482         sp_nodepath_select_all (this->nodepath, invert);
 483 }
 484 void ShapeEditor::select_all_from_subpath (bool invert) {
 485     if (this->nodepath)
 486         sp_nodepath_select_all_from_subpath (this->nodepath, invert);
 487 }
 488 void ShapeEditor::select_next () {
 489     if (this->nodepath) {
 490         sp_nodepath_select_next (this->nodepath);
 491         if (this->nodepath->numSelected() >= 1) {
 492             this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
 493         }
 494     }
 495 }
 496 void ShapeEditor::select_prev () {
 497     if (this->nodepath) {
 498         sp_nodepath_select_prev (this->nodepath);
 499         if (this->nodepath->numSelected() >= 1) {
 500             this->desktop->scroll_to_point(&(this->nodepath->singleSelectedCoords()), 1.0);
 501         }
 502     }
 503 }
 504
 505 void ShapeEditor::show_handles (bool show) {
 506     if (this->nodepath && !this->nodepath->straight_path)
 507         sp_nodepath_show_handles (this->nodepath, show);
 508 }
 509
 510 void ShapeEditor::show_helperpath (bool show) {
 511     if (this->nodepath)
 512         sp_nodepath_show_helperpath (this->nodepath, show);
 513 }
 514
 515 void ShapeEditor::flip (NR::Dim2 axis, NR::Maybe<NR::Point> center) {
 516     if (this->nodepath)
 517         sp_nodepath_flip (this->nodepath, axis, center);
 518 }
 519
 520 void ShapeEditor::distribute (NR::Dim2 axis) {
 521     if (this->nodepath)
 522         sp_nodepath_selected_distribute (this->nodepath, axis);
 523 }
 524 void ShapeEditor::align (NR::Dim2 axis) {
 525     if (this->nodepath)
 526         sp_nodepath_selected_align (this->nodepath, axis);
 527 }
 528
 529
 530 /*
 531   Local Variables:
 532   mode:c++
 533   c-file-style:"stroustrup"
 534   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 535   indent-tabs-mode:nil
 536   fill-column:99
 537   End:
 538 */
 539 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :