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 <glibmm/i18n.h>
  23 #include "sp-path.h"
  24 #include "sp-text.h"
  25 #include "sp-flowtext.h"
  26 #include "libnr/nr-path.h"
  27 #include "text-editing.h"
  28 #include "style.h"
  29 #include "inkscape.h"
  30 #include "document.h"
  31 #include "message-stack.h"
  32 #include "selection.h"
  33 #include "desktop-handles.h"
  34
  35 /* Helper functions for sp_selected_path_to_curves */
  36 static void sp_selected_path_to_curves0(gboolean do_document_done, guint32 text_grouping_policy);
  37 static Inkscape::XML::Node *sp_selected_item_to_curved_repr(SPItem *item, guint32 text_grouping_policy);
  38 enum {
  39     /* Not used yet. This is the placeholder of Lauris's idea. */
  40     SP_TOCURVE_INTERACTIVE       = 1 << 0,
  41     SP_TOCURVE_GROUPING_BY_WORD  = 1 << 1,
  42     SP_TOCURVE_GROUPING_BY_LINE  = 1 << 2,
  43     SP_TOCURVE_GROUPING_BY_WHOLE = 1 << 3
  44 };
  45
  46 void
  47 sp_selected_path_combine(void)
  48 {
  49     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
  50
  51     Inkscape::Selection *selection = sp_desktop_selection(desktop);
  52     GSList *items = (GSList *) selection->itemList();
  53
  54     if (g_slist_length(items) < 2) {
  55         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>at least two objects</b> to combine."));
  56         return;
  57     }
  58
  59     for (GSList *i = items; i != NULL; i = i->next) {
  60         SPItem *item = (SPItem *) i->data;
  61         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item)) {
  62             sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("At least one of the objects is <b>not a path</b>, cannot combine."));
  63             return;
  64         }
  65     }
  66
  67     Inkscape::XML::Node *parent = SP_OBJECT_REPR((SPItem *) items->data)->parent();
  68     for (GSList *i = items; i != NULL; i = i->next) {
  69         if ( SP_OBJECT_REPR((SPItem *) i->data)->parent() != parent ) {
  70             sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("You cannot combine objects from <b>different groups</b> or <b>layers</b>."));
  71             return;
  72         }
  73     }
  74
  75     sp_selected_path_to_curves0(FALSE, 0);
  76
  77     items = (GSList *) selection->itemList();
  78
  79     items = g_slist_copy(items);
  80
  81     items = g_slist_sort(items, (GCompareFunc) sp_item_repr_compare_position);
  82
  83     // remember the position of the topmost object
  84     gint topmost = (SP_OBJECT_REPR((SPItem *) g_slist_last(items)->data))->position();
  85
  86     // remember the id of the bottomost object
  87     char const *id = SP_OBJECT_REPR((SPItem *) items->data)->attribute("id");
  88
  89     // FIXME: merge styles of combined objects instead of using the first one's style
  90     gchar *style = g_strdup(SP_OBJECT_REPR((SPItem *) items->data)->attribute("style"));
  91
  92     GString *dstring = g_string_new("");
  93     for (GSList *i = items; i != NULL; i = i->next) {
  94
  95         SPPath *path = (SPPath *) i->data;
  96         SPCurve *c = sp_shape_get_curve(SP_SHAPE(path));
  97
  98         NArtBpath *abp = nr_artpath_affine(c->bpath, SP_ITEM(path)->transform);
  99         sp_curve_unref(c);
 100         gchar *str = sp_svg_write_path(abp);
 101         nr_free(abp);
 102
 103         dstring = g_string_append(dstring, str);
 104         g_free(str);
 105
 106         // if this is the bottommost object,
 107         if (!strcmp(SP_OBJECT_REPR(path)->attribute("id"), id)) {
 108             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 109             SP_OBJECT(path)->deleteObject(false);
 110         } else {
 111             // delete the object for real, so that its clones can take appropriate action
 112             SP_OBJECT(path)->deleteObject();
 113         }
 114
 115         topmost--;
 116     }
 117
 118     g_slist_free(items);
 119
 120     Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 121
 122     // restore id
 123     repr->setAttribute("id", id);
 124
 125     repr->setAttribute("style", style);
 126     g_free(style);
 127
 128     repr->setAttribute("d", dstring->str);
 129     g_string_free(dstring, TRUE);
 130
 131     // add the new group to the group members' common parent
 132     parent->appendChild(repr);
 133
 134     // move to the position of the topmost, reduced by the number of deleted items
 135     repr->setPosition(topmost > 0 ? topmost + 1 : 0);
 136
 137     sp_document_done(sp_desktop_document(desktop));
 138
 139     selection->set(repr);
 140
 141     Inkscape::GC::release(repr);
 142 }
 143
 144 void
 145 sp_selected_path_break_apart(void)
 146 {
 147     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 148
 149     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 150
 151     if (selection->isEmpty()) {
 152         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to break apart."));
 153         return;
 154     }
 155
 156     bool did = false;
 157
 158     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 159          items != NULL;
 160          items = items->next) {
 161
 162         SPItem *item = (SPItem *) items->data;
 163
 164         if (!SP_IS_PATH(item))
 165             continue;
 166
 167         SPPath *path = SP_PATH(item);
 168
 169         SPCurve *curve = sp_shape_get_curve(SP_SHAPE(path));
 170         if (curve == NULL)
 171             continue;
 172
 173         did = true;
 174
 175         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 176         gint pos = SP_OBJECT_REPR(item)->position();
 177         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 178
 179         gchar *style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
 180
 181         NArtBpath *abp = nr_artpath_affine(curve->bpath, (SP_ITEM(path))->transform);
 182
 183         sp_curve_unref(curve);
 184
 185         // it's going to resurrect as one of the pieces, so we delete without advertisement
 186         SP_OBJECT(item)->deleteObject(false);
 187
 188         curve = sp_curve_new_from_bpath(abp);
 189         g_assert(curve != NULL);
 190
 191         GSList *list = sp_curve_split(curve);
 192
 193         sp_curve_unref(curve);
 194
 195         for (GSList *l = g_slist_reverse(list); l != NULL; l = l->next) {
 196             curve = (SPCurve *) l->data;
 197
 198             Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 199             repr->setAttribute("style", style);
 200
 201             gchar *str = sp_svg_write_path(curve->bpath);
 202             repr->setAttribute("d", str);
 203             g_free(str);
 204
 205             // add the new repr to the parent
 206             parent->appendChild(repr);
 207
 208             // move to the saved position
 209             repr->setPosition(pos > 0 ? pos : 0);
 210
 211             // if it's the first one, restore id
 212             if (l == list)
 213                 repr->setAttribute("id", id);
 214
 215             selection->add(repr);
 216
 217             Inkscape::GC::release(repr);
 218         }
 219
 220         g_slist_free(list);
 221         g_free(style);
 222
 223     }
 224
 225     if (did) {
 226         sp_document_done(sp_desktop_document(desktop));
 227     } else {
 228         sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No path(s)</b> to break apart in the selection."));
 229         return;
 230     }
 231 }
 232
 233 /* This function is an entry point from GUI */
 234 void
 235 sp_selected_path_to_curves(void)
 236 {
 237     sp_selected_path_to_curves0(TRUE, SP_TOCURVE_INTERACTIVE);
 238 }
 239
 240 static void
 241 sp_selected_path_to_curves0(gboolean interactive, guint32 text_grouping_policy)
 242 {
 243     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 244
 245     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 246
 247     if (selection->isEmpty()) {
 248         if (interactive)
 249             sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to convert to path."));
 250         return;
 251     }
 252
 253     bool did = false;
 254
 255     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 256          items != NULL;
 257          items = items->next) {
 258
 259         SPItem *item = SP_ITEM(items->data);
 260
 261         Inkscape::XML::Node *repr = sp_selected_item_to_curved_repr(item, 0);
 262         if (!repr)
 263             continue;
 264
 265         did = true;
 266
 267         // remember the position of the item
 268         gint pos = SP_OBJECT_REPR(item)->position();
 269         // remember parent
 270         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 271         // remember id
 272         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 273
 274         selection->remove(item);
 275
 276         // it's going to resurrect, so we delete without advertisement
 277         SP_OBJECT(item)->deleteObject(false);
 278
 279         // restore id
 280         repr->setAttribute("id", id);
 281         // add the new repr to the parent
 282         parent->appendChild(repr);
 283         // move to the saved position
 284         repr->setPosition(pos > 0 ? pos : 0);
 285
 286         selection->add(repr);
 287         Inkscape::GC::release(repr);
 288     }
 289
 290     if (interactive) {
 291         if (did) {
 292             sp_document_done(sp_desktop_document(desktop));
 293         } else {
 294             sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No objects</b> to convert to path in the selection."));
 295             return;
 296         }
 297     }
 298 }
 299
 300 static Inkscape::XML::Node *
 301 sp_selected_item_to_curved_repr(SPItem *item, guint32 text_grouping_policy)
 302 {
 303     if (!item)
 304         return NULL;
 305
 306     SPCurve *curve = NULL;
 307     if (SP_IS_SHAPE(item)) {
 308         curve = sp_shape_get_curve(SP_SHAPE(item));
 309     } else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 310         curve = te_get_layout(item)->convertToCurves();
 311     }
 312
 313     if (!curve)
 314         return NULL;
 315
 316     Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 317     /* Transformation */
 318     repr->setAttribute("transform", SP_OBJECT_REPR(item)->attribute("transform"));
 319     /* Style */
 320     gchar *style_str = sp_style_write_difference(SP_OBJECT_STYLE(item),
 321                                                  SP_OBJECT_STYLE(SP_OBJECT_PARENT(item)));
 322     repr->setAttribute("style", style_str);
 323     g_free(style_str);
 324     /* Rotation center */
 325     sp_repr_set_attr(repr, "inkscape:transform-center-x", SP_OBJECT_REPR(item)->attribute("inkscape:transform-center-x"));
 326     sp_repr_set_attr(repr, "inkscape:transform-center-y", SP_OBJECT_REPR(item)->attribute("inkscape:transform-center-y"));
 327
 328     /* Definition */
 329     gchar *def_str = sp_svg_write_path(curve->bpath);
 330     repr->setAttribute("d", def_str);
 331     g_free(def_str);
 332     sp_curve_unref(curve);
 333     return repr;
 334 }
 335
 336 void
 337 sp_selected_path_reverse()
 338 {
 339     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 340
 341     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 342     GSList *items = (GSList *) selection->itemList();
 343
 344     if (!items) {
 345         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to reverse."));
 346         return;
 347     }
 348
 349
 350     bool did = false;
 351     for (GSList *i = items; i != NULL; i = i->next) {
 352
 353         if (!SP_IS_SHAPE(i->data))
 354             continue;
 355
 356         did = true;
 357         SPShape *shape = SP_SHAPE(i->data);
 358
 359         SPCurve *rcurve = sp_curve_reverse(shape->curve);
 360
 361         gchar *str = sp_svg_write_path(rcurve->bpath);
 362         SP_OBJECT_REPR(shape)->setAttribute("d", str);
 363         g_free(str);
 364
 365         sp_curve_unref(rcurve);
 366     }
 367
 368     if (did) {
 369         sp_document_done(sp_desktop_document(desktop));
 370     } else {
 371         sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to reverse in the selection."));
 372     }
 373 }
 374
 375 /*
 376   Local Variables:
 377   mode:c++
 378   c-file-style:"stroustrup"
 379   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 380   indent-tabs-mode:nil
 381   fill-column:99
 382   End:
 383 */
 384 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :