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