src/path-chemistry.cpp

   1 #define __SP_PATH_CHEMISTRY_C__
   2
   3 /*
   4  * Here are handlers for modifying selections, specific to paths
   5  *
   6  * Authors:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *   bulia byak <buliabyak@users.sf.net>
   9  *   Jasper van de Gronde <th.v.d.gronde@hccnet.nl>
  10  *
  11  * Copyright (C) 1999-2008 Authors
  12  * Copyright (C) 2001-2002 Ximian, Inc.
  13  *
  14  * Released under GNU GPL, read the file 'COPYING' for more information
  15  */
  16
  17 #ifdef HAVE_CONFIG_H
  18 # include <config.h>
  19 #endif
  20 #include <cstring>
  21 #include <string>
  22 #include "xml/repr.h"
  23 #include "svg/svg.h"
  24 #include "display/curve.h"
  25 #include <glib/gmem.h>
  26 #include <glibmm/i18n.h>
  27 #include "sp-path.h"
  28 #include "sp-text.h"
  29 #include "sp-flowtext.h"
  30 #include "libnr/nr-path.h"
  31 #include "text-editing.h"
  32 #include "style.h"
  33 #include "inkscape.h"
  34 #include "desktop.h"
  35 #include "document.h"
  36 #include "message-stack.h"
  37 #include "selection.h"
  38 #include "desktop-handles.h"
  39 #include "box3d.h"
  40
  41 #include "path-chemistry.h"
  42
  43 /* Helper functions for sp_selected_path_to_curves */
  44 static void sp_selected_path_to_curves0(gboolean do_document_done, guint32 text_grouping_policy);
  45 static bool sp_item_list_to_curves(const GSList *items, GSList **selected, GSList **to_select);
  46
  47 enum {
  48     /* Not used yet. This is the placeholder of Lauris's idea. */
  49     SP_TOCURVE_INTERACTIVE       = 1 << 0,
  50     SP_TOCURVE_GROUPING_BY_WORD  = 1 << 1,
  51     SP_TOCURVE_GROUPING_BY_LINE  = 1 << 2,
  52     SP_TOCURVE_GROUPING_BY_WHOLE = 1 << 3
  53 };
  54
  55 void
  56 sp_selected_path_combine(void)
  57 {
  58     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
  59     Inkscape::Selection *selection = sp_desktop_selection(desktop);
  60
  61     if (g_slist_length((GSList *) selection->itemList()) < 2) {
  62         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>at least two objects</b> to combine."));
  63         return;
  64     }
  65
  66     desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, _("Combining paths..."));
  67     // set "busy" cursor
  68     desktop->setWaitingCursor();
  69
  70     sp_selected_path_to_curves0(FALSE, 0);
  71
  72     GSList *items = g_slist_copy((GSList *) selection->itemList());
  73     items = g_slist_sort(items, (GCompareFunc) sp_item_repr_compare_position);
  74     items = g_slist_reverse(items);
  75
  76     // remember the position, id, transform and style of the topmost path, they will be assigned to the combined one
  77     gint position = 0;
  78     char const *id = NULL;
  79     char const *transform = NULL;
  80     gchar *style = NULL;
  81
  82     SPCurve* curve = 0;
  83     bool did = false;
  84     SPItem *first = NULL;
  85     Inkscape::XML::Node *parent = NULL;
  86
  87     for (GSList *i = items; i != NULL; i = i->next) {  // going from top to bottom
  88
  89         SPItem *item = (SPItem *) i->data;
  90         if (!SP_IS_PATH(item))
  91             continue;
  92         did = true;
  93
  94         SPCurve *c = sp_shape_get_curve(SP_SHAPE(item));
  95         if (first == NULL) {  // this is the topmost path
  96             first = item;
  97             parent = SP_OBJECT_REPR(first)->parent();
  98             position = SP_OBJECT_REPR(first)->position();
  99             id = SP_OBJECT_REPR(first)->attribute("id");
 100             transform = SP_OBJECT_REPR(first)->attribute("transform");
 101             // FIXME: merge styles of combined objects instead of using the first one's style
 102             style = g_strdup(SP_OBJECT_REPR(first)->attribute("style"));
 103             //sp_curve_transform(c, item->transform);
 104             curve = c;
 105         } else {
 106             sp_curve_transform(c, item->getRelativeTransform(SP_OBJECT(first)));
 107             sp_curve_append(curve, c, false);
 108             sp_curve_unref(c);
 109         }
 110
 111         // unless this is the topmost object,
 112         if (item != first) {
 113             // reduce position only if the same parent
 114             if (SP_OBJECT_REPR(item)->parent() == parent)
 115                 position--;
 116             // delete the object for real, so that its clones can take appropriate action
 117             SP_OBJECT(item)->deleteObject();
 118         }
 119     }
 120
 121     g_slist_free(items);
 122
 123     if (did) {
 124         selection->clear();
 125
 126         // delete the topmost one so that its clones don't get alerted; this object will be
 127         // restored shortly, with the same id
 128         SP_OBJECT(first)->deleteObject(false);
 129
 130         Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 131         Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 132
 133         // restore id, transform and style
 134         repr->setAttribute("id", id);
 135         if (transform) repr->setAttribute("transform", transform);
 136         repr->setAttribute("style", style);
 137         g_free(style);
 138
 139         // set path data corresponding to new curve
 140         gchar *dstring = sp_svg_write_path(SP_CURVE_BPATH(curve));
 141         sp_curve_unref(curve);
 142         repr->setAttribute("d", dstring);
 143         g_free(dstring);
 144
 145         // add the new group to the parent of the topmost
 146         parent->appendChild(repr);
 147
 148         // move to the position of the topmost, reduced by the number of deleted items
 149         repr->setPosition(position > 0 ? position : 0);
 150
 151         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_COMBINE,
 152                          _("Combine"));
 153
 154         selection->set(repr);
 155
 156         Inkscape::GC::release(repr);
 157
 158     } else {
 159         sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No path(s)</b> to combine in the selection."));
 160     }
 161
 162     desktop->clearWaitingCursor();
 163 }
 164
 165 void
 166 sp_selected_path_break_apart(void)
 167 {
 168     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 169
 170     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 171
 172     if (selection->isEmpty()) {
 173         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to break apart."));
 174         return;
 175     }
 176
 177     desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, _("Breaking apart paths..."));
 178     // set "busy" cursor
 179     desktop->setWaitingCursor();
 180
 181     bool did = false;
 182
 183     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 184          items != NULL;
 185          items = items->next) {
 186
 187         SPItem *item = (SPItem *) items->data;
 188
 189         if (!SP_IS_PATH(item))
 190             continue;
 191
 192         SPPath *path = SP_PATH(item);
 193
 194         SPCurve *curve = sp_shape_get_curve(SP_SHAPE(path));
 195         if (curve == NULL)
 196             continue;
 197
 198         did = true;
 199
 200         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 201         gint pos = SP_OBJECT_REPR(item)->position();
 202         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 203
 204         gchar *style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
 205
 206         NArtBpath *abp = nr_artpath_affine(SP_CURVE_BPATH(curve), (SP_ITEM(path))->transform);
 207
 208         sp_curve_unref(curve);
 209
 210         // it's going to resurrect as one of the pieces, so we delete without advertisement
 211         SP_OBJECT(item)->deleteObject(false);
 212
 213         curve = sp_curve_new_from_bpath(abp);
 214         g_assert(curve != NULL);
 215
 216         GSList *list = sp_curve_split(curve);
 217
 218         sp_curve_unref(curve);
 219
 220         GSList *reprs = NULL;
 221         for (GSList *l = list; l != NULL; l = l->next) {
 222             curve = (SPCurve *) l->data;
 223
 224             Inkscape::XML::Node *repr = parent->document()->createElement("svg:path");
 225             repr->setAttribute("style", style);
 226
 227             gchar *str = sp_svg_write_path(SP_CURVE_BPATH(curve));
 228             repr->setAttribute("d", str);
 229             g_free(str);
 230
 231             // add the new repr to the parent
 232             parent->appendChild(repr);
 233
 234             // move to the saved position
 235             repr->setPosition(pos > 0 ? pos : 0);
 236
 237             // if it's the first one, restore id
 238             if (l == list)
 239                 repr->setAttribute("id", id);
 240
 241             reprs = g_slist_prepend (reprs, repr);
 242
 243             Inkscape::GC::release(repr);
 244         }
 245
 246         selection->setReprList(reprs);
 247
 248         g_slist_free(reprs);
 249         g_slist_free(list);
 250         g_free(style);
 251
 252     }
 253
 254     desktop->clearWaitingCursor();
 255
 256     if (did) {
 257         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_BREAK_APART,
 258                          _("Break apart"));
 259     } else {
 260         sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No path(s)</b> to break apart in the selection."));
 261     }
 262 }
 263
 264 /* This function is an entry point from GUI */
 265 void
 266 sp_selected_path_to_curves(bool interactive)
 267 {
 268     if (interactive) {
 269         sp_selected_path_to_curves0(TRUE, SP_TOCURVE_INTERACTIVE);
 270     } else {
 271         sp_selected_path_to_curves0(false, 0);
 272     }
 273 }
 274
 275 static void
 276 sp_selected_path_to_curves0(gboolean interactive, guint32 /*text_grouping_policy*/)
 277 {
 278     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 279
 280     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 281
 282     if (selection->isEmpty()) {
 283         if (interactive)
 284             sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to convert to path."));
 285         return;
 286     }
 287
 288     bool did = false;
 289     if (interactive) {
 290         desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, _("Converting objects to paths..."));
 291         // set "busy" cursor
 292         desktop->setWaitingCursor();
 293     }
 294
 295     GSList *selected = g_slist_copy((GSList *) selection->itemList());
 296     GSList *to_select = NULL;
 297     selection->clear();
 298     GSList *items = g_slist_copy(selected);
 299
 300     did = sp_item_list_to_curves(items, &selected, &to_select);
 301
 302     g_slist_free (items);
 303     selection->setReprList(to_select);
 304     selection->addList(selected);
 305     g_slist_free (to_select);
 306     g_slist_free (selected);
 307
 308     if (interactive) {
 309         desktop->clearWaitingCursor();
 310         if (did) {
 311             sp_document_done(sp_desktop_document(desktop), SP_VERB_OBJECT_TO_CURVE,
 312                              _("Object to path"));
 313         } else {
 314             sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No objects</b> to convert to path in the selection."));
 315             return;
 316         }
 317     }
 318 }
 319
 320 static bool
 321 sp_item_list_to_curves(const GSList *items, GSList **selected, GSList **to_select)
 322 {
 323     bool did = false;
 324
 325     for (;
 326          items != NULL;
 327          items = items->next) {
 328
 329         SPItem *item = SP_ITEM(items->data);
 330
 331         if (SP_IS_PATH(item) && !SP_PATH(item)->original_curve) {
 332             continue; // already a path, and no path effect
 333         }
 334
 335         if (SP_IS_BOX3D(item)) {
 336             // convert 3D box to ordinary group of paths; replace the old element in 'selected' with the new group
 337             Inkscape::XML::Node *repr = SP_OBJECT_REPR(box3d_convert_to_group(SP_BOX3D(item)));
 338
 339             if (repr) {
 340                 *to_select = g_slist_prepend (*to_select, repr);
 341                 did = true;
 342                 *selected = g_slist_remove (*selected, item);
 343             }
 344
 345             continue;
 346         }
 347
 348         if (SP_IS_GROUP(item)) {
 349             sp_lpe_item_remove_path_effect(SP_LPE_ITEM(item), true);
 350             GSList *item_list = sp_item_group_item_list(SP_GROUP(item));
 351
 352             GSList *item_to_select = NULL;
 353             GSList *item_selected = NULL;
 354
 355             if (sp_item_list_to_curves(item_list, &item_selected, &item_to_select))
 356                 did = true;
 357
 358             g_slist_free(item_list);
 359             g_slist_free(item_to_select);
 360             g_slist_free(item_selected);
 361
 362             continue;
 363         }
 364
 365         Inkscape::XML::Node *repr = sp_selected_item_to_curved_repr(item, 0);
 366         if (!repr)
 367             continue;
 368
 369         did = true;
 370         *selected = g_slist_remove (*selected, item);
 371
 372         // remember the position of the item
 373         gint pos = SP_OBJECT_REPR(item)->position();
 374         // remember parent
 375         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 376         // remember id
 377         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 378
 379         // It's going to resurrect, so we delete without notifying listeners.
 380         SP_OBJECT(item)->deleteObject(false);
 381
 382         // restore id
 383         repr->setAttribute("id", id);
 384         // add the new repr to the parent
 385         parent->appendChild(repr);
 386         // move to the saved position
 387         repr->setPosition(pos > 0 ? pos : 0);
 388
 389         /* Buglet: We don't re-add the (new version of the) object to the selection of any other
 390          * desktops where it was previously selected. */
 391         *to_select = g_slist_prepend (*to_select, repr);
 392         Inkscape::GC::release(repr);
 393     }
 394
 395     return did;
 396 }
 397
 398 Inkscape::XML::Node *
 399 sp_selected_item_to_curved_repr(SPItem *item, guint32 /*text_grouping_policy*/)
 400 {
 401     if (!item)
 402         return NULL;
 403
 404     SPCurve *curve = NULL;
 405     if (SP_IS_SHAPE(item)) {
 406         curve = sp_shape_get_curve(SP_SHAPE(item));
 407     } else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 408         curve = te_get_layout(item)->convertToCurves();
 409     }
 410
 411     if (!curve)
 412         return NULL;
 413
 414     // Prevent empty paths from being added to the document
 415     // otherwise we end up with zomby markup in the SVG file
 416     if(curve->end <= 0)
 417     {
 418         sp_curve_unref(curve);
 419         return NULL;
 420     }
 421
 422     Inkscape::XML::Document *xml_doc = SP_OBJECT_REPR(item)->document();
 423     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 424     /* Transformation */
 425     repr->setAttribute("transform", SP_OBJECT_REPR(item)->attribute("transform"));
 426     /* Style */
 427     gchar *style_str = sp_style_write_difference(SP_OBJECT_STYLE(item),
 428                                                  SP_OBJECT_STYLE(SP_OBJECT_PARENT(item)));
 429     repr->setAttribute("style", style_str);
 430     g_free(style_str);
 431
 432     /* Mask */
 433     gchar *mask_str = (gchar *) SP_OBJECT_REPR(item)->attribute("mask");
 434     if ( mask_str )
 435         repr->setAttribute("mask", mask_str);
 436
 437     /* Clip path */
 438     gchar *clip_path_str = (gchar *) SP_OBJECT_REPR(item)->attribute("clip-path");
 439     if ( clip_path_str )
 440         repr->setAttribute("clip-path", clip_path_str);
 441
 442     /* Rotation center */
 443     sp_repr_set_attr(repr, "inkscape:transform-center-x", SP_OBJECT_REPR(item)->attribute("inkscape:transform-center-x"));
 444     sp_repr_set_attr(repr, "inkscape:transform-center-y", SP_OBJECT_REPR(item)->attribute("inkscape:transform-center-y"));
 445
 446     /* Definition */
 447     gchar *def_str = sp_svg_write_path(SP_CURVE_BPATH(curve));
 448     repr->setAttribute("d", def_str);
 449     g_free(def_str);
 450     sp_curve_unref(curve);
 451     return repr;
 452 }
 453
 454
 455 // FIXME: THIS DOES NOT REVERSE THE NODETYPES ORDER!
 456 void
 457 sp_selected_path_reverse()
 458 {
 459     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 460
 461     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 462     GSList *items = (GSList *) selection->itemList();
 463
 464     if (!items) {
 465         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to reverse."));
 466         return;
 467     }
 468
 469
 470     // set "busy" cursor
 471     desktop->setWaitingCursor();
 472
 473     bool did = false;
 474     desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, _("Reversing paths..."));
 475
 476     for (GSList *i = items; i != NULL; i = i->next) {
 477
 478         if (!SP_IS_PATH(i->data))
 479             continue;
 480
 481         did = true;
 482         SPPath *path = SP_PATH(i->data);
 483
 484         SPCurve *rcurve = sp_curve_reverse(sp_path_get_curve_reference(path));
 485
 486         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(rcurve));
 487         if ( sp_lpe_item_has_path_effect_recursive(SP_LPE_ITEM(path)) ) {
 488             SP_OBJECT_REPR(path)->setAttribute("inkscape:original-d", str);
 489         } else {
 490             SP_OBJECT_REPR(path)->setAttribute("d", str);
 491         }
 492         g_free(str);
 493
 494         sp_curve_unref(rcurve);
 495     }
 496
 497     desktop->clearWaitingCursor();
 498
 499     if (did) {
 500         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_REVERSE,
 501                          _("Reverse path"));
 502     } else {
 503         sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to reverse in the selection."));
 504     }
 505 }
 506
 507 /*
 508   Local Variables:
 509   mode:c++
 510   c-file-style:"stroustrup"
 511   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 512   indent-tabs-mode:nil
 513   fill-column:99
 514   End:
 515 */
 516 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :