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 "document.h"
  32 #include "message-stack.h"
  33 #include "selection.h"
  34 #include "desktop-handles.h"
  35
  36 /* Helper functions for sp_selected_path_to_curves */
  37 static void sp_selected_path_to_curves0(gboolean do_document_done, guint32 text_grouping_policy);
  38 static Inkscape::XML::Node *sp_selected_item_to_curved_repr(SPItem *item, guint32 text_grouping_policy);
  39 enum {
  40     /* Not used yet. This is the placeholder of Lauris's idea. */
  41     SP_TOCURVE_INTERACTIVE       = 1 << 0,
  42     SP_TOCURVE_GROUPING_BY_WORD  = 1 << 1,
  43     SP_TOCURVE_GROUPING_BY_LINE  = 1 << 2,
  44     SP_TOCURVE_GROUPING_BY_WHOLE = 1 << 3
  45 };
  46
  47 void
  48 sp_selected_path_combine(void)
  49 {
  50     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
  51
  52     Inkscape::Selection *selection = sp_desktop_selection(desktop);
  53     GSList *items = (GSList *) selection->itemList();
  54
  55     if (g_slist_length(items) < 2) {
  56         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>at least two objects</b> to combine."));
  57         return;
  58     }
  59
  60     for (GSList *i = items; i != NULL; i = i->next) {
  61         SPItem *item = (SPItem *) i->data;
  62         if (!SP_IS_SHAPE(item) && !SP_IS_TEXT(item)) {
  63             sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("At least one of the objects is <b>not a path</b>, cannot combine."));
  64             return;
  65         }
  66     }
  67
  68     Inkscape::XML::Node *parent = SP_OBJECT_REPR((SPItem *) items->data)->parent();
  69     for (GSList *i = items; i != NULL; i = i->next) {
  70         if ( SP_OBJECT_REPR((SPItem *) i->data)->parent() != parent ) {
  71             sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("You cannot combine objects from <b>different groups</b> or <b>layers</b>."));
  72             return;
  73         }
  74     }
  75
  76     sp_selected_path_to_curves0(FALSE, 0);
  77
  78     items = (GSList *) selection->itemList();
  79
  80     items = g_slist_copy(items);
  81
  82     items = g_slist_sort(items, (GCompareFunc) sp_item_repr_compare_position);
  83
  84     // remember the position of the topmost object
  85     gint topmost = (SP_OBJECT_REPR((SPItem *) g_slist_last(items)->data))->position();
  86
  87     // remember the id of the bottomost object
  88     char const *id = SP_OBJECT_REPR((SPItem *) items->data)->attribute("id");
  89
  90     // FIXME: merge styles of combined objects instead of using the first one's style
  91     gchar *style = g_strdup(SP_OBJECT_REPR((SPItem *) items->data)->attribute("style"));
  92
  93     GString *dstring = g_string_new("");
  94     for (GSList *i = items; i != NULL; i = i->next) {
  95
  96         SPPath *path = (SPPath *) i->data;
  97         SPCurve *c = sp_shape_get_curve(SP_SHAPE(path));
  98
  99         NArtBpath *abp = nr_artpath_affine(SP_CURVE_BPATH(c), SP_ITEM(path)->transform);
 100         sp_curve_unref(c);
 101         gchar *str = sp_svg_write_path(abp);
 102         g_free(abp);
 103
 104         dstring = g_string_append(dstring, str);
 105         g_free(str);
 106
 107         // if this is the bottommost object,
 108         if (!strcmp(SP_OBJECT_REPR(path)->attribute("id"), id)) {
 109             // delete it so that its clones don't get alerted; this object will be restored shortly, with the same id
 110             SP_OBJECT(path)->deleteObject(false);
 111         } else {
 112             // delete the object for real, so that its clones can take appropriate action
 113             SP_OBJECT(path)->deleteObject();
 114         }
 115
 116         topmost--;
 117     }
 118
 119     g_slist_free(items);
 120
 121     Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 122
 123     // restore id
 124     repr->setAttribute("id", id);
 125
 126     repr->setAttribute("style", style);
 127     g_free(style);
 128
 129     repr->setAttribute("d", dstring->str);
 130     g_string_free(dstring, TRUE);
 131
 132     // add the new group to the group members' common parent
 133     parent->appendChild(repr);
 134
 135     // move to the position of the topmost, reduced by the number of deleted items
 136     repr->setPosition(topmost > 0 ? topmost + 1 : 0);
 137
 138     sp_document_done(sp_desktop_document(desktop));
 139
 140     selection->set(repr);
 141
 142     Inkscape::GC::release(repr);
 143 }
 144
 145 void
 146 sp_selected_path_break_apart(void)
 147 {
 148     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 149
 150     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 151
 152     if (selection->isEmpty()) {
 153         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to break apart."));
 154         return;
 155     }
 156
 157     bool did = false;
 158
 159     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 160          items != NULL;
 161          items = items->next) {
 162
 163         SPItem *item = (SPItem *) items->data;
 164
 165         if (!SP_IS_PATH(item))
 166             continue;
 167
 168         SPPath *path = SP_PATH(item);
 169
 170         SPCurve *curve = sp_shape_get_curve(SP_SHAPE(path));
 171         if (curve == NULL)
 172             continue;
 173
 174         did = true;
 175
 176         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 177         gint pos = SP_OBJECT_REPR(item)->position();
 178         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 179
 180         gchar *style = g_strdup(SP_OBJECT(item)->repr->attribute("style"));
 181
 182         NArtBpath *abp = nr_artpath_affine(SP_CURVE_BPATH(curve), (SP_ITEM(path))->transform);
 183
 184         sp_curve_unref(curve);
 185
 186         // it's going to resurrect as one of the pieces, so we delete without advertisement
 187         SP_OBJECT(item)->deleteObject(false);
 188
 189         curve = sp_curve_new_from_bpath(abp);
 190         g_assert(curve != NULL);
 191
 192         GSList *list = sp_curve_split(curve);
 193
 194         sp_curve_unref(curve);
 195
 196         GSList *reprs = NULL;
 197         for (GSList *l = list; l != NULL; l = l->next) {
 198             curve = (SPCurve *) l->data;
 199
 200             Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 201             repr->setAttribute("style", style);
 202
 203             gchar *str = sp_svg_write_path(SP_CURVE_BPATH(curve));
 204             repr->setAttribute("d", str);
 205             g_free(str);
 206
 207             // add the new repr to the parent
 208             parent->appendChild(repr);
 209
 210             // move to the saved position
 211             repr->setPosition(pos > 0 ? pos : 0);
 212
 213             // if it's the first one, restore id
 214             if (l == list)
 215                 repr->setAttribute("id", id);
 216
 217             reprs = g_slist_prepend (reprs, repr);
 218
 219             Inkscape::GC::release(repr);
 220         }
 221
 222         selection->setReprList(reprs);
 223
 224         g_slist_free(reprs);
 225         g_slist_free(list);
 226         g_free(style);
 227
 228     }
 229
 230     if (did) {
 231         sp_document_done(sp_desktop_document(desktop));
 232     } else {
 233         sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No path(s)</b> to break apart in the selection."));
 234         return;
 235     }
 236 }
 237
 238 /* This function is an entry point from GUI */
 239 void
 240 sp_selected_path_to_curves(void)
 241 {
 242     sp_selected_path_to_curves0(TRUE, SP_TOCURVE_INTERACTIVE);
 243 }
 244
 245 static void
 246 sp_selected_path_to_curves0(gboolean interactive, guint32 text_grouping_policy)
 247 {
 248     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 249
 250     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 251
 252     if (selection->isEmpty()) {
 253         if (interactive)
 254             sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>object(s)</b> to convert to path."));
 255         return;
 256     }
 257
 258     bool did = false;
 259
 260     for (GSList *items = g_slist_copy((GSList *) selection->itemList());
 261          items != NULL;
 262          items = items->next) {
 263
 264         SPItem *item = SP_ITEM(items->data);
 265
 266         Inkscape::XML::Node *repr = sp_selected_item_to_curved_repr(item, 0);
 267         if (!repr)
 268             continue;
 269
 270         did = true;
 271
 272         // remember the position of the item
 273         gint pos = SP_OBJECT_REPR(item)->position();
 274         // remember parent
 275         Inkscape::XML::Node *parent = SP_OBJECT_REPR(item)->parent();
 276         // remember id
 277         char const *id = SP_OBJECT_REPR(item)->attribute("id");
 278
 279         selection->remove(item);
 280
 281         // it's going to resurrect, so we delete without advertisement
 282         SP_OBJECT(item)->deleteObject(false);
 283
 284         // restore id
 285         repr->setAttribute("id", id);
 286         // add the new repr to the parent
 287         parent->appendChild(repr);
 288         // move to the saved position
 289         repr->setPosition(pos > 0 ? pos : 0);
 290
 291         selection->add(repr);
 292         Inkscape::GC::release(repr);
 293     }
 294
 295     if (interactive) {
 296         if (did) {
 297             sp_document_done(sp_desktop_document(desktop));
 298         } else {
 299             sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No objects</b> to convert to path in the selection."));
 300             return;
 301         }
 302     }
 303 }
 304
 305 static Inkscape::XML::Node *
 306 sp_selected_item_to_curved_repr(SPItem *item, guint32 text_grouping_policy)
 307 {
 308     if (!item)
 309         return NULL;
 310
 311     SPCurve *curve = NULL;
 312     if (SP_IS_SHAPE(item)) {
 313         curve = sp_shape_get_curve(SP_SHAPE(item));
 314     } else if (SP_IS_TEXT(item) || SP_IS_FLOWTEXT(item)) {
 315         curve = te_get_layout(item)->convertToCurves();
 316     }
 317
 318     if (!curve)
 319         return NULL;
 320
 321     Inkscape::XML::Node *repr = sp_repr_new("svg:path");
 322     /* Transformation */
 323     repr->setAttribute("transform", SP_OBJECT_REPR(item)->attribute("transform"));
 324     /* Style */
 325     gchar *style_str = sp_style_write_difference(SP_OBJECT_STYLE(item),
 326                                                  SP_OBJECT_STYLE(SP_OBJECT_PARENT(item)));
 327     repr->setAttribute("style", style_str);
 328     g_free(style_str);
 329     /* Rotation center */
 330     sp_repr_set_attr(repr, "inkscape:transform-center-x", SP_OBJECT_REPR(item)->attribute("inkscape:transform-center-x"));
 331     sp_repr_set_attr(repr, "inkscape:transform-center-y", SP_OBJECT_REPR(item)->attribute("inkscape:transform-center-y"));
 332
 333     /* Definition */
 334     gchar *def_str = sp_svg_write_path(SP_CURVE_BPATH(curve));
 335     repr->setAttribute("d", def_str);
 336     g_free(def_str);
 337     sp_curve_unref(curve);
 338     return repr;
 339 }
 340
 341 void
 342 sp_selected_path_reverse()
 343 {
 344     SPDesktop *desktop = SP_ACTIVE_DESKTOP;
 345
 346     Inkscape::Selection *selection = sp_desktop_selection(desktop);
 347     GSList *items = (GSList *) selection->itemList();
 348
 349     if (!items) {
 350         sp_desktop_message_stack(desktop)->flash(Inkscape::WARNING_MESSAGE, _("Select <b>path(s)</b> to reverse."));
 351         return;
 352     }
 353
 354
 355     bool did = false;
 356     for (GSList *i = items; i != NULL; i = i->next) {
 357
 358         if (!SP_IS_SHAPE(i->data))
 359             continue;
 360
 361         did = true;
 362         SPShape *shape = SP_SHAPE(i->data);
 363
 364         SPCurve *rcurve = sp_curve_reverse(shape->curve);
 365
 366         gchar *str = sp_svg_write_path(SP_CURVE_BPATH(rcurve));
 367         SP_OBJECT_REPR(shape)->setAttribute("d", str);
 368         g_free(str);
 369
 370         sp_curve_unref(rcurve);
 371     }
 372
 373     if (did) {
 374         sp_document_done(sp_desktop_document(desktop));
 375     } else {
 376         sp_desktop_message_stack(desktop)->flash(Inkscape::ERROR_MESSAGE, _("<b>No paths</b> to reverse in the selection."));
 377     }
 378 }
 379
 380 /*
 381   Local Variables:
 382   mode:c++
 383   c-file-style:"stroustrup"
 384   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 385   indent-tabs-mode:nil
 386   fill-column:99
 387   End:
 388 */
 389 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :