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