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