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  *
  10  * Copyright (C) 1999-2004 Authors
  11  * Copyright (C) 2001-2002 Ximian, Inc.
  12  *
  13  * Released under GNU GPL, read the file 'COPYING' for more information
  14  */
  15
  16 #ifdef HAVE_CONFIG_H
  17 # include <config.h>
  18 #endif
  19 #include <cstring>
  20 #include <string>
  21 #include "xml/repr.h"
  22 #include "svg/svg.h"
  23 #include "display/curve.h"
  24 #include <glib/gmem.h>
  25 #include <glibmm/i18n.h>
  26 #include "sp-path.h"
  27 #include "sp-text.h"
  28 #include "sp-flowtext.h"
  29 #include "libnr/nr-path.h"
  30 #include "text-editing.h"
  31 #include "style.h"
  32 #include "inkscape.h"
  33 #include "desktop.h"
  34 #include "document.h"
  35 #include "message-stack.h"
  36 #include "selection.h"
  37 #include "desktop-handles.h"
  38 #include "box3d.h"
  39
  40 #include "path-chemistry.h"
  41
  42 /* Helper functions for sp_selected_path_to_curves */
  43 static void sp_selected_path_to_curves0(gboolean do_document_done, guint32 text_grouping_policy);
  44 enum {
  45     /* Not used yet. This is the placeholder of Lauris's idea. */
  46     SP_TOCURVE_INTERACTIVE       = 1 << 0,
  47     SP_TOCURVE_GROUPING_BY_WORD  = 1 << 1,
  48     SP_TOCURVE_GROUPING_BY_LINE  = 1 << 2,
  49     SP_TOCURVE_GROUPING_BY_WHOLE = 1 << 3
  50 };
  51
  52 void
  53 sp_selected_path_combine(void)
  54 {
  55     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
  56
  57     Inkscape::Selection *selection = sp_desktop_selection(desktop);
  58     GSList *items = (GSList *) selection->itemList();
  59
  60     if (g_slist_length(items) < 2) {
  61         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>at least two objects</b> to combine."));
  62         return;
  63     }
  64
  65     for (GSList *i = items; i != NULL; i = i->next) {
  66         SPItem *item = (SPItem *) i->data;
  67         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item)) {
  68             sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("At least one of the objects is <b>not a path</b>, cannot combine."));
  69             return;
  70         }
  71     }
  72
  73     Inkscape::XML::Node *parent = SP_OBJECT_REPR((SPItem *) items->data)->parent();
  74     for (GSList *i = items; i != NULL; i = i->next) {
  75         if ( SP_OBJECT_REPR((SPItem *) i->data)->parent() != parent ) {
  76             sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("You cannot combine objects from <b>different groups</b> or <b>layers</b>."));
  77             return;
  78         }
  79     }
  80
  81     desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, _("Combining paths..."));
  82     // set "busy" cursor
  83     desktop->setWaitingCursor();
  84
  85     sp_selected_path_to_curves0(FALSE, 0);
  86
  87     items = g_slist_copy((GSList *) selection->itemList());
  88     items = g_slist_sort(items, (GCompareFunc) sp_item_repr_compare_position);
  89     selection->clear();
  90
  91     // remember the position of the topmost object
  92     gint topmost = (SP_OBJECT_REPR((SPItem *) g_slist_last(items)->data))->position();
  93
  94     // remember the id of the bottomost object
  95     char const *id = SP_OBJECT_REPR((SPItem *) items->data)->attribute("id");
  96
  97     // FIXME: merge styles of combined objects instead of using the first one's style
  98     gchar *style = g_strdup(SP_OBJECT_REPR((SPItem *) items->data)->attribute("style"));
  99
 100     GString *dstring = g_string_new("");
 101     for (GSList *i = items; i != NULL; i = i->next) {
 102
 103         SPPath *path = (SPPath *) i->data;
 104         SPCurve *c = sp_shape_get_curve(SP_SHAPE(path));
 105
 106         NArtBpath *abp = nr_artpath_affine(SP_CURVE_BPATH(c), SP_ITEM(path)->transform);
 107         sp_curve_unref(c);
 108         gchar *str = sp_svg_write_path(abp);
 109         g_free(abp);
 110
 111         dstring = g_string_append(dstring, str);
 112         g_free(str);
 113
 114         // if this is the bottommost object,
 115         if (!strcmp(SP_OBJECT_REPR(path)->attribute("id"), id)) {
 116             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 117             SP_OBJECT(path)->deleteObject(false);
 118         } else {
 119             // delete the object for real, so that its clones can take appropriate action
 120             SP_OBJECT(path)->deleteObject();
 121         }
 122
 123         topmost--;
 124     }
 125
 126     g_slist_free(items);
 127
 128     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 129     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 130
 131     // restore id
 132     repr->setAttribute("id", id);
 133
 134     repr->setAttribute("style", style);
 135     g_free(style);
 136
 137     repr->setAttribute("d", dstring->str);
 138     g_string_free(dstring, TRUE);
 139
 140     // add the new group to the group members' common parent
 141     parent->appendChild(repr);
 142
 143     // move to the position of the topmost, reduced by the number of deleted items
 144     repr->setPosition(topmost > 0 ? topmost + 1 : 0);
 145
 146     desktop->clearWaitingCursor();
 147
 148     sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_COMBINE,
 149                          _("Combine"));
 150
 151     selection->set(repr);
 152
 153     Inkscape::GC::release(repr);
 154 }
 155
 156 void
 157 sp_selected_path_break_apart(void)
 158 {
 159     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 160
 161     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 162
 163     if (selection->isEmpty()) {
 164         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to break apart."));
 165         return;
 166     }
 167
 168     desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, _("Breaking apart paths..."));
 169     // set "busy" cursor
 170     desktop->setWaitingCursor();
 171
 172     bool did = false;
 173
 174     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 175          items != NULL;
 176          items = items->next) {
 177
 178         SPItem *item = (SPItem *) items->data;
 179
 180         if (!SP_IS_PATH(item))
 181             continue;
 182
 183         SPPath *path = SP_PATH(item);
 184
 185         SPCurve *curve = sp_shape_get_curve(SP_SHAPE(path));
 186         if (curve == NULL)
 187             continue;
 188
 189         did = true;
 190
 191         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 192         gint pos = SP_OBJECT_REPR(item)->position();
 193         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 194
 195         gchar *style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
 196
 197         NArtBpath *abp = nr_artpath_affine(SP_CURVE_BPATH(curve), (SP_ITEM(path))->transform);
 198
 199         sp_curve_unref(curve);
 200
 201         // it's going to resurrect as one of the pieces, so we delete without advertisement
 202         SP_OBJECT(item)->deleteObject(false);
 203
 204         curve = sp_curve_new_from_bpath(abp);
 205         g_assert(curve != NULL);
 206
 207         GSList *list = sp_curve_split(curve);
 208
 209         sp_curve_unref(curve);
 210
 211         GSList *reprs = NULL;
 212         for (GSList *l = list; l != NULL; l = l->next) {
 213             curve = (SPCurve *) l->data;
 214
 215             Inkscape::XML::Node *repr = parent->document()->createElement("svg:path");
 216             repr->setAttribute("style", style);
 217
 218             gchar *str = sp_svg_write_path(SP_CURVE_BPATH(curve));
 219             repr->setAttribute("d", str);
 220             g_free(str);
 221
 222             // add the new repr to the parent
 223             parent->appendChild(repr);
 224
 225             // move to the saved position
 226             repr->setPosition(pos > 0 ? pos : 0);
 227
 228             // if it's the first one, restore id
 229             if (l == list)
 230                 repr->setAttribute("id", id);
 231
 232             reprs = g_slist_prepend (reprs, repr);
 233
 234             Inkscape::GC::release(repr);
 235         }
 236
 237         selection->setReprList(reprs);
 238
 239         g_slist_free(reprs);
 240         g_slist_free(list);
 241         g_free(style);
 242
 243     }
 244
 245     desktop->clearWaitingCursor();
 246
 247     if (did) {
 248         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_BREAK_APART,
 249                          _("Break apart"));
 250     } else {
 251         sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No path(s)</b> to break apart in the selection."));
 252         return;
 253     }
 254 }
 255
 256 /* This function is an entry point from GUI */
 257 void
 258 sp_selected_path_to_curves(void)
 259 {
 260     sp_selected_path_to_curves0(TRUE, SP_TOCURVE_INTERACTIVE);
 261 }
 262
 263 static void
 264 sp_selected_path_to_curves0(gboolean interactive, guint32 /*text_grouping_policy*/)
 265 {
 266     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 267
 268     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 269
 270     if (selection->isEmpty()) {
 271         if (interactive)
 272             sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to convert to path."));
 273         return;
 274     }
 275
 276     bool did = false;
 277     if (interactive) {
 278         desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, _("Converting objects to paths..."));
 279         // set "busy" cursor
 280         desktop->setWaitingCursor();
 281     }
 282
 283     GSList *selected = g_slist_copy((GSList *) selection->itemList());
 284     GSList *to_select = NULL;
 285     selection->clear();
 286     GSList *items = g_slist_copy(selected);
 287
 288     for (;
 289          items != NULL;
 290          items = items->next) {
 291
 292         SPItem *item = SP_ITEM(items->data);
 293
 294         if (SP_IS_PATH(item) && !SP_PATH(item)->original_curve) {
 295             continue; // already a path, and no path effect
 296         }
 297
 298         if (SP_IS_BOX3D(item)) {
 299             // convert 3D box to ordinary group of paths; replace the old element in 'selected' with the new group
 300             GSList *sel_it = g_slist_find(selected, item);
 301             sel_it->data = box3d_convert_to_group(SP_BOX3D(item));
 302             item = SP_ITEM(sel_it->data);
 303
 304             did = true;
 305             selected = g_slist_remove (selected, item);
 306
 307             continue;
 308         }
 309
 310         Inkscape::XML::Node *repr = sp_selected_item_to_curved_repr(item, 0);
 311         if (!repr)
 312             continue;
 313
 314         did = true;
 315         selected = g_slist_remove (selected, item);
 316
 317         // remember the position of the item
 318         gint pos = SP_OBJECT_REPR(item)->position();
 319         // remember parent
 320         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 321         // remember id
 322         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 323
 324         // It's going to resurrect, so we delete without notifying listeners.
 325         SP_OBJECT(item)->deleteObject(false);
 326
 327         // restore id
 328         repr->setAttribute("id", id);
 329         // add the new repr to the parent
 330         parent->appendChild(repr);
 331         // move to the saved position
 332         repr->setPosition(pos > 0 ? pos : 0);
 333
 334         /* Buglet: We don't re-add the (new version of the) object to the selection of any other
 335          * desktops where it was previously selected. */
 336         to_select = g_slist_prepend (to_select, repr);
 337         Inkscape::GC::release(repr);
 338     }
 339
 340     g_slist_free (items);
 341     selection->setReprList(to_select);
 342     selection->addList(selected);
 343     g_slist_free (to_select);
 344     g_slist_free (selected);
 345
 346     if (interactive) {
 347         desktop->clearWaitingCursor();
 348         if (did) {
 349             sp_document_done(sp_desktop_document(desktop), SP_VERB_OBJECT_TO_CURVE,
 350                              _("Object to path"));
 351         } else {
 352             sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No objects</b> to convert to path in the selection."));
 353             return;
 354         }
 355     }
 356 }
 357
 358 Inkscape::XML::Node *
 359 sp_selected_item_to_curved_repr(SPItem *item, guint32 /*text_grouping_policy*/)
 360 {
 361     if (!item)
 362         return NULL;
 363
 364     SPCurve *curve = NULL;
 365     if (SP_IS_SHAPE(item)) {
 366         curve = sp_shape_get_curve(SP_SHAPE(item));
 367     } else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 368         curve = te_get_layout(item)->convertToCurves();
 369     }
 370
 371     if (!curve)
 372         return NULL;
 373
 374     Inkscape::XML::Document *xml_doc = SP_OBJECT_REPR(item)->document();
 375     Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
 376     /* Transformation */
 377     repr->setAttribute("transform", SP_OBJECT_REPR(item)->attribute("transform"));
 378     /* Style */
 379     gchar *style_str = sp_style_write_difference(SP_OBJECT_STYLE(item),
 380                                                  SP_OBJECT_STYLE(SP_OBJECT_PARENT(item)));
 381     repr->setAttribute("style", style_str);
 382     g_free(style_str);
 383
 384     /* Mask */
 385     gchar *mask_str = (gchar *) SP_OBJECT_REPR(item)->attribute("mask");
 386     if ( mask_str )
 387         repr->setAttribute("mask", mask_str);
 388
 389     /* Clip path */
 390     gchar *clip_path_str = (gchar *) SP_OBJECT_REPR(item)->attribute("clip-path");
 391     if ( clip_path_str )
 392         repr->setAttribute("clip-path", clip_path_str);
 393
 394     /* Rotation center */
 395     sp_repr_set_attr(repr, "inkscape:transform-center-x", SP_OBJECT_REPR(item)->attribute("inkscape:transform-center-x"));
 396     sp_repr_set_attr(repr, "inkscape:transform-center-y", SP_OBJECT_REPR(item)->attribute("inkscape:transform-center-y"));
 397
 398     /* Definition */
 399     gchar *def_str = sp_svg_write_path(SP_CURVE_BPATH(curve));
 400     repr->setAttribute("d", def_str);
 401     g_free(def_str);
 402     sp_curve_unref(curve);
 403     return repr;
 404 }
 405
 406
 407 // FIXME: THIS DOES NOT REVERSE THE NODETYPES ORDER!
 408 void
 409 sp_selected_path_reverse()
 410 {
 411     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 412
 413     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 414     GSList *items = (GSList *) selection->itemList();
 415
 416     if (!items) {
 417         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to reverse."));
 418         return;
 419     }
 420
 421
 422     // set "busy" cursor
 423     desktop->setWaitingCursor();
 424
 425     bool did = false;
 426     desktop->messageStack()->flash(Inkscape::IMMEDIATE_MESSAGE, _("Reversing paths..."));
 427
 428     for (GSList *i = items; i != NULL; i = i->next) {
 429
 430         if (!SP_IS_PATH(i->data))
 431             continue;
 432
 433         did = true;
 434         SPPath *path = SP_PATH(i->data);
 435
 436         SPCurve *rcurve = sp_curve_reverse(sp_path_get_curve_reference(path));
 437
 438         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(rcurve));
 439         if ( sp_shape_has_path_effect(SP_SHAPE(path)) ) {
 440             SP_OBJECT_REPR(path)->setAttribute("inkscape:original-d", str);
 441         } else {
 442             SP_OBJECT_REPR(path)->setAttribute("d", str);
 443         }
 444         g_free(str);
 445
 446         sp_curve_unref(rcurve);
 447     }
 448
 449     desktop->clearWaitingCursor();
 450
 451     if (did) {
 452         sp_document_done(sp_desktop_document(desktop), SP_VERB_SELECTION_REVERSE,
 453                          _("Reverse path"));
 454     } else {
 455         sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to reverse in the selection."));
 456     }
 457 }
 458
 459 /*
 460   Local Variables:
 461   mode:c++
 462   c-file-style:"stroustrup"
 463   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 464   indent-tabs-mode:nil
 465   fill-column:99
 466   End:
 467 */
 468 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :