src/sp-namedview.cpp

   1 #define __SP_NAMEDVIEW_C__
   2
   3 /*
   4  * <sodipodi:namedview> implementation
   5  *
   6  * Authors:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *   bulia byak <buliabyak@users.sf.net>
   9  *
  10  * Copyright (C) 2006      Johan Engelen <johan@shouraizou.nl>
  11  * Copyright (C) 1999-2005 Authors
  12  * Copyright (C) 2000-2001 Ximian, Inc.
  13  *
  14  * Released under GNU GPL, read the file 'COPYING' for more information
  15  */
  16
  17 #include "config.h"
  18
  19 #include "display/canvas-grid.h"
  20 #include "display/canvas-axonomgrid.h"
  21 #include "helper/units.h"
  22 #include "svg/svg-color.h"
  23 #include "xml/repr.h"
  24 #include "attributes.h"
  25 #include "document.h"
  26 #include "desktop-events.h"
  27 #include "desktop-handles.h"
  28 #include "event-log.h"
  29 #include "sp-guide.h"
  30 #include "sp-item-group.h"
  31 #include "sp-namedview.h"
  32 #include "prefs-utils.h"
  33 #include "desktop.h"
  34 #include "conn-avoid-ref.h" // for defaultConnSpacing.
  35
  36 #include "isnan.h" //temp fix for isnan().  include last
  37
  38 #define DEFAULTTOLERANCE 0.4
  39 #define DEFAULTGRIDCOLOR 0x3f3fff25
  40 #define DEFAULTGRIDEMPCOLOR 0x3f3fff60
  41 #define DEFAULTGRIDEMPSPACING 5
  42 #define DEFAULTGUIDECOLOR 0x0000ff7f
  43 #define DEFAULTGUIDEHICOLOR 0xff00007f
  44 #define DEFAULTBORDERCOLOR 0x000000ff
  45 #define DEFAULTPAGECOLOR 0xffffff00
  46
  47 static void sp_namedview_class_init(SPNamedViewClass *klass);
  48 static void sp_namedview_init(SPNamedView *namedview);
  49
  50 static void sp_namedview_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
  51 static void sp_namedview_release(SPObject *object);
  52 static void sp_namedview_set(SPObject *object, unsigned int key, const gchar *value);
  53 static void sp_namedview_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref);
  54 static void sp_namedview_remove_child(SPObject *object, Inkscape::XML::Node *child);
  55 static Inkscape::XML::Node *sp_namedview_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
  56
  57 static void sp_namedview_setup_guides(SPNamedView * nv);
  58
  59 static void sp_namedview_setup_grid(SPNamedView * nv);
  60 static void sp_namedview_setup_grid_item(SPNamedView * nv, SPCanvasItem * item);
  61
  62 static gboolean sp_str_to_bool(const gchar *str);
  63 static gboolean sp_nv_read_length(const gchar *str, guint base, gdouble *val, const SPUnit **unit);
  64 static gboolean sp_nv_read_opacity(const gchar *str, guint32 *color);
  65
  66 static SPObjectGroupClass * parent_class;
  67
  68 GType
  69 sp_namedview_get_type()
  70 {
  71     static GType namedview_type = 0;
  72     if (!namedview_type) {
  73         GTypeInfo namedview_info = {
  74             sizeof(SPNamedViewClass),
  75             NULL,       /* base_init */
  76             NULL,       /* base_finalize */
  77             (GClassInitFunc) sp_namedview_class_init,
  78             NULL,       /* class_finalize */
  79             NULL,       /* class_data */
  80             sizeof(SPNamedView),
  81             16, /* n_preallocs */
  82             (GInstanceInitFunc) sp_namedview_init,
  83             NULL,       /* value_table */
  84         };
  85         namedview_type = g_type_register_static(SP_TYPE_OBJECTGROUP, "SPNamedView", &namedview_info, (GTypeFlags)0);
  86     }
  87     return namedview_type;
  88 }
  89
  90 static void sp_namedview_class_init(SPNamedViewClass * klass)
  91 {
  92     GObjectClass * gobject_class;
  93     SPObjectClass * sp_object_class;
  94
  95     gobject_class = (GObjectClass *) klass;
  96     sp_object_class = (SPObjectClass *) klass;
  97
  98     parent_class = (SPObjectGroupClass*) g_type_class_ref(SP_TYPE_OBJECTGROUP);
  99
 100     sp_object_class->build = sp_namedview_build;
 101     sp_object_class->release = sp_namedview_release;
 102     sp_object_class->set = sp_namedview_set;
 103     sp_object_class->child_added = sp_namedview_child_added;
 104     sp_object_class->remove_child = sp_namedview_remove_child;
 105     sp_object_class->write = sp_namedview_write;
 106 }
 107
 108 static void sp_namedview_init(SPNamedView *nv)
 109 {
 110     nv->editable = TRUE;
 111     nv->showgrid = FALSE;
 112     nv->gridtype = 0;
 113     nv->showguides = TRUE;
 114     nv->showborder = TRUE;
 115     nv->showpageshadow = TRUE;
 116
 117     nv->guides = NULL;
 118     nv->viewcount = 0;
 119
 120     nv->default_layer_id = 0;
 121
 122     nv->connector_spacing = defaultConnSpacing;
 123
 124     new (&nv->snap_manager) SnapManager(nv);
 125 }
 126
 127 static void sp_namedview_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
 128 {
 129     SPNamedView *nv = (SPNamedView *) object;
 130     SPObjectGroup *og = (SPObjectGroup *) object;
 131
 132     if (((SPObjectClass *) (parent_class))->build) {
 133         (* ((SPObjectClass *) (parent_class))->build)(object, document, repr);
 134     }
 135
 136     sp_object_read_attr(object, "inkscape:document-units");
 137     sp_object_read_attr(object, "viewonly");
 138     sp_object_read_attr(object, "showgrid");
 139     sp_object_read_attr(object, "gridtype");
 140     sp_object_read_attr(object, "showguides");
 141     sp_object_read_attr(object, "gridtolerance");
 142     sp_object_read_attr(object, "guidetolerance");
 143     sp_object_read_attr(object, "objecttolerance");
 144     sp_object_read_attr(object, "inkscape:has_abs_tolerance");
 145     sp_object_read_attr(object, "gridoriginx");
 146     sp_object_read_attr(object, "gridoriginy");
 147     sp_object_read_attr(object, "gridspacingx");
 148     sp_object_read_attr(object, "gridspacingy");
 149     sp_object_read_attr(object, "gridanglex");
 150     sp_object_read_attr(object, "gridanglez");
 151     sp_object_read_attr(object, "gridempspacing");
 152     sp_object_read_attr(object, "gridcolor");
 153     sp_object_read_attr(object, "gridempcolor");
 154     sp_object_read_attr(object, "gridopacity");
 155     sp_object_read_attr(object, "gridempopacity");
 156     sp_object_read_attr(object, "guidecolor");
 157     sp_object_read_attr(object, "guideopacity");
 158     sp_object_read_attr(object, "guidehicolor");
 159     sp_object_read_attr(object, "guidehiopacity");
 160     sp_object_read_attr(object, "showborder");
 161     sp_object_read_attr(object, "inkscape:showpageshadow");
 162     sp_object_read_attr(object, "borderlayer");
 163     sp_object_read_attr(object, "bordercolor");
 164     sp_object_read_attr(object, "borderopacity");
 165     sp_object_read_attr(object, "pagecolor");
 166     sp_object_read_attr(object, "inkscape:pageopacity");
 167     sp_object_read_attr(object, "inkscape:pageshadow");
 168     sp_object_read_attr(object, "inkscape:zoom");
 169     sp_object_read_attr(object, "inkscape:cx");
 170     sp_object_read_attr(object, "inkscape:cy");
 171     sp_object_read_attr(object, "inkscape:window-width");
 172     sp_object_read_attr(object, "inkscape:window-height");
 173     sp_object_read_attr(object, "inkscape:window-x");
 174     sp_object_read_attr(object, "inkscape:window-y");
 175     sp_object_read_attr(object, "inkscape:grid-bbox");
 176     sp_object_read_attr(object, "inkscape:guide-bbox");
 177     sp_object_read_attr(object, "inkscape:object-bbox");
 178     sp_object_read_attr(object, "inkscape:grid-points");
 179     sp_object_read_attr(object, "inkscape:guide-points");
 180     sp_object_read_attr(object, "inkscape:object-points");
 181     sp_object_read_attr(object, "inkscape:object-paths");
 182     sp_object_read_attr(object, "inkscape:object-nodes");
 183     sp_object_read_attr(object, "inkscape:current-layer");
 184     sp_object_read_attr(object, "inkscape:connector-spacing");
 185
 186     /* Construct guideline list */
 187
 188     for (SPObject *o = sp_object_first_child(SP_OBJECT(og)) ; o != NULL; o = SP_OBJECT_NEXT(o) ) {
 189         if (SP_IS_GUIDE(o)) {
 190             SPGuide * g = SP_GUIDE(o);
 191             nv->guides = g_slist_prepend(nv->guides, g);
 192             g_object_set(G_OBJECT(g), "color", nv->guidecolor, "hicolor", nv->guidehicolor, NULL);
 193         }
 194     }
 195 }
 196
 197 static void sp_namedview_release(SPObject *object)
 198 {
 199     SPNamedView *namedview = (SPNamedView *) object;
 200
 201     if (namedview->guides) {
 202         g_slist_free(namedview->guides);
 203         namedview->guides = NULL;
 204     }
 205
 206     while (namedview->gridviews) {
 207         gtk_object_unref(GTK_OBJECT(namedview->gridviews->data));
 208         namedview->gridviews = g_slist_remove(namedview->gridviews, namedview->gridviews->data);
 209     }
 210
 211     if (((SPObjectClass *) parent_class)->release) {
 212         ((SPObjectClass *) parent_class)->release(object);
 213     }
 214
 215     namedview->snap_manager.~SnapManager();
 216 }
 217
 218 static void sp_namedview_set(SPObject *object, unsigned int key, const gchar *value)
 219 {
 220     SPNamedView *nv = SP_NAMEDVIEW(object);
 221     SPUnit const &px = sp_unit_get_by_id(SP_UNIT_PX);
 222
 223     switch (key) {
 224         case SP_ATTR_VIEWONLY:
 225             nv->editable = (!value);
 226             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 227             break;
 228         case SP_ATTR_SHOWGRID:
 229             nv->showgrid = sp_str_to_bool(value);
 230             sp_namedview_setup_grid(nv);
 231             /* Disable grid snaps if the grid is turned off */
 232             nv->snap_manager.grid.setEnabled(nv->showgrid);
 233             nv->snap_manager.axonomgrid.setEnabled(nv->showgrid);
 234             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 235             break;
 236         case SP_ATTR_GRIDTYPE:
 237             nv->gridtype = sp_str_to_bool(value);
 238             sp_namedview_setup_grid(nv);
 239             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 240             break;
 241         case SP_ATTR_SHOWGUIDES:
 242             if (!value) { // show guides if not specified, for backwards compatibility
 243                 nv->showguides = TRUE;
 244             } else {
 245                 nv->showguides = sp_str_to_bool(value);
 246             }
 247             sp_namedview_setup_guides(nv);
 248             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 249             break;
 250         case SP_ATTR_GRIDTOLERANCE:
 251             nv->gridtoleranceunit = &px;
 252             nv->gridtolerance = DEFAULTTOLERANCE;
 253             if (value) {
 254                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->gridtolerance, &nv->gridtoleranceunit);
 255             }
 256             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 257             break;
 258         case SP_ATTR_GUIDETOLERANCE:
 259             nv->guidetoleranceunit = &px;
 260             nv->guidetolerance = DEFAULTTOLERANCE;
 261             if (value) {
 262                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->guidetolerance, &nv->guidetoleranceunit);
 263             }
 264             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 265             break;
 266         case SP_ATTR_OBJECTTOLERANCE:
 267             nv->objecttoleranceunit = &px;
 268             nv->objecttolerance = DEFAULTTOLERANCE;
 269             if (value) {
 270                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->objecttolerance, &nv->objecttoleranceunit);
 271             }
 272             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 273             break;
 274         case SP_ATTR_ABS_TOLERANCE:
 275              if (!value)
 276                  nv->has_abs_tolerance = true;
 277              else
 278                  nv->has_abs_tolerance = (sp_str_to_bool (value) == TRUE);
 279              object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 280              break;
 281         case SP_ATTR_GRIDORIGINX:
 282         case SP_ATTR_GRIDORIGINY:
 283         {
 284             unsigned const d = (key == SP_ATTR_GRIDORIGINY);
 285             nv->gridunit = nv->doc_units;
 286             nv->gridorigin[d] = 0.0;
 287             if (value) {
 288                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->gridorigin[d], &nv->gridunit);
 289             }
 290             nv->gridorigin[d] = sp_units_get_pixels(nv->gridorigin[d], *(nv->gridunit));
 291             sp_namedview_setup_grid(nv);
 292             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 293             break;
 294         }
 295         case SP_ATTR_GRIDSPACINGX:
 296         case SP_ATTR_GRIDSPACINGY:
 297         {
 298             unsigned const d = (key == SP_ATTR_GRIDSPACINGY);
 299             nv->gridunit = nv->doc_units;
 300             nv->gridspacing[d] = 1.0;
 301             if (value) {
 302                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->gridspacing[d], &nv->gridunit);
 303             }
 304             nv->gridspacing[d] = sp_units_get_pixels(nv->gridspacing[d], *(nv->gridunit));
 305             sp_namedview_setup_grid(nv);
 306             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 307             break;
 308         }
 309         case SP_ATTR_GRIDANGLEX:
 310         case SP_ATTR_GRIDANGLEZ:
 311         {
 312             unsigned const d = (key == SP_ATTR_GRIDANGLEZ); // 0=X  1=Z
 313             nv->gridangle[d] = 30; // 30 deg default
 314             if (value) {
 315                 nv->gridangle[d] = g_ascii_strtod(value, NULL);
 316             }
 317             sp_namedview_setup_grid(nv);
 318             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 319             break;
 320         }
 321         case SP_ATTR_GRIDCOLOR:
 322             nv->gridcolor = (nv->gridcolor & 0xff) | (DEFAULTGRIDCOLOR & 0xffffff00);
 323             if (value) {
 324                 nv->gridcolor = (nv->gridcolor & 0xff) | sp_svg_read_color(value, nv->gridcolor);
 325             }
 326             sp_namedview_setup_grid(nv);
 327             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 328             break;
 329         case SP_ATTR_GRIDEMPCOLOR:
 330             nv->gridempcolor = (nv->gridempcolor & 0xff) | (DEFAULTGRIDEMPCOLOR & 0xffffff00);
 331             if (value) {
 332                 nv->gridempcolor = (nv->gridempcolor & 0xff) | sp_svg_read_color(value, nv->gridempcolor);
 333             }
 334             sp_namedview_setup_grid(nv);
 335             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 336             break;
 337         case SP_ATTR_GRIDOPACITY:
 338             nv->gridcolor = (nv->gridcolor & 0xffffff00) | (DEFAULTGRIDCOLOR & 0xff);
 339             sp_nv_read_opacity(value, &nv->gridcolor);
 340             sp_namedview_setup_grid(nv);
 341             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 342             break;
 343         case SP_ATTR_GRIDEMPOPACITY:
 344             nv->gridempcolor = (nv->gridempcolor & 0xffffff00) | (DEFAULTGRIDEMPCOLOR & 0xff);
 345             sp_nv_read_opacity(value, &nv->gridempcolor);
 346             sp_namedview_setup_grid(nv);
 347             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 348             break;
 349         case SP_ATTR_GRIDEMPSPACING:
 350             nv->gridempspacing = DEFAULTGRIDEMPSPACING;
 351             if (value != NULL)
 352                 nv->gridempspacing = atoi(value);
 353             sp_namedview_setup_grid(nv);
 354             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 355             break;
 356         case SP_ATTR_GUIDECOLOR:
 357             nv->guidecolor = (nv->guidecolor & 0xff) | (DEFAULTGUIDECOLOR & 0xffffff00);
 358             if (value) {
 359                 nv->guidecolor = (nv->guidecolor & 0xff) | sp_svg_read_color(value, nv->guidecolor);
 360             }
 361             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 362                 g_object_set(G_OBJECT(l->data), "color", nv->guidecolor, NULL);
 363             }
 364             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 365             break;
 366         case SP_ATTR_GUIDEOPACITY:
 367             nv->guidecolor = (nv->guidecolor & 0xffffff00) | (DEFAULTGUIDECOLOR & 0xff);
 368             sp_nv_read_opacity(value, &nv->guidecolor);
 369             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 370                 g_object_set(G_OBJECT(l->data), "color", nv->guidecolor, NULL);
 371             }
 372             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 373             break;
 374         case SP_ATTR_GUIDEHICOLOR:
 375             nv->guidehicolor = (nv->guidehicolor & 0xff) | (DEFAULTGUIDEHICOLOR & 0xffffff00);
 376             if (value) {
 377                 nv->guidehicolor = (nv->guidehicolor & 0xff) | sp_svg_read_color(value, nv->guidehicolor);
 378             }
 379             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 380                 g_object_set(G_OBJECT(l->data), "hicolor", nv->guidehicolor, NULL);
 381             }
 382             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 383             break;
 384         case SP_ATTR_GUIDEHIOPACITY:
 385             nv->guidehicolor = (nv->guidehicolor & 0xffffff00) | (DEFAULTGUIDEHICOLOR & 0xff);
 386             sp_nv_read_opacity(value, &nv->guidehicolor);
 387             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 388                 g_object_set(G_OBJECT(l->data), "hicolor", nv->guidehicolor, NULL);
 389             }
 390             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 391             break;
 392         case SP_ATTR_SHOWBORDER:
 393             nv->showborder = (value) ? sp_str_to_bool (value) : TRUE;
 394             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 395             break;
 396         case SP_ATTR_BORDERLAYER:
 397             nv->borderlayer = SP_BORDER_LAYER_BOTTOM;
 398             if (value && !strcasecmp(value, "true")) nv->borderlayer = SP_BORDER_LAYER_TOP;
 399             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 400             break;
 401         case SP_ATTR_BORDERCOLOR:
 402             nv->bordercolor = (nv->bordercolor & 0xff) | (DEFAULTBORDERCOLOR & 0xffffff00);
 403             if (value) {
 404                 nv->bordercolor = (nv->bordercolor & 0xff) | sp_svg_read_color (value, nv->bordercolor);
 405             }
 406             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 407             break;
 408         case SP_ATTR_BORDEROPACITY:
 409             nv->bordercolor = (nv->bordercolor & 0xffffff00) | (DEFAULTBORDERCOLOR & 0xff);
 410             sp_nv_read_opacity(value, &nv->bordercolor);
 411             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 412             break;
 413         case SP_ATTR_PAGECOLOR:
 414             nv->pagecolor = (nv->pagecolor & 0xff) | (DEFAULTPAGECOLOR & 0xffffff00);
 415             if (value) {
 416                 nv->pagecolor = (nv->pagecolor & 0xff) | sp_svg_read_color(value, nv->pagecolor);
 417             }
 418             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 419             break;
 420         case SP_ATTR_INKSCAPE_PAGEOPACITY:
 421             nv->pagecolor = (nv->pagecolor & 0xffffff00) | (DEFAULTPAGECOLOR & 0xff);
 422             sp_nv_read_opacity(value, &nv->pagecolor);
 423             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 424             break;
 425         case SP_ATTR_INKSCAPE_PAGESHADOW:
 426             nv->pageshadow = value? atoi(value) : 2; // 2 is the default
 427             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 428             break;
 429         case SP_ATTR_SHOWPAGESHADOW:
 430             nv->showpageshadow = (value) ? sp_str_to_bool(value) : TRUE;
 431             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 432             break;
 433         case SP_ATTR_INKSCAPE_ZOOM:
 434             nv->zoom = value ? g_ascii_strtod(value, NULL) : 0; // zero means not set
 435             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 436             break;
 437         case SP_ATTR_INKSCAPE_CX:
 438             nv->cx = value ? g_ascii_strtod(value, NULL) : HUGE_VAL; // HUGE_VAL means not set
 439             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 440             break;
 441         case SP_ATTR_INKSCAPE_CY:
 442             nv->cy = value ? g_ascii_strtod(value, NULL) : HUGE_VAL; // HUGE_VAL means not set
 443             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 444             break;
 445         case SP_ATTR_INKSCAPE_WINDOW_WIDTH:
 446             nv->window_width = value? atoi(value) : -1; // -1 means not set
 447             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 448             break;
 449         case SP_ATTR_INKSCAPE_WINDOW_HEIGHT:
 450             nv->window_height = value ? atoi(value) : -1; // -1 means not set
 451             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 452             break;
 453         case SP_ATTR_INKSCAPE_WINDOW_X:
 454             nv->window_x = value ? atoi(value) : -1; // -1 means not set
 455             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 456             break;
 457         case SP_ATTR_INKSCAPE_WINDOW_Y:
 458             nv->window_y = value ? atoi(value) : -1; // -1 means not set
 459             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 460             break;
 461         case SP_ATTR_INKSCAPE_GRID_BBOX:
 462             nv->snap_manager.grid.setSnapTo(Inkscape::Snapper::BBOX_POINT, value ? sp_str_to_bool(value) : TRUE);
 463             nv->snap_manager.axonomgrid.setSnapTo(Inkscape::Snapper::BBOX_POINT, value ? sp_str_to_bool(value) : TRUE);
 464             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 465             break;
 466         case SP_ATTR_INKSCAPE_GRID_POINTS:
 467             nv->snap_manager.grid.setSnapTo(Inkscape::Snapper::SNAP_POINT, value ? sp_str_to_bool(value) : FALSE);
 468             nv->snap_manager.axonomgrid.setSnapTo(Inkscape::Snapper::SNAP_POINT, value ? sp_str_to_bool(value) : FALSE);
 469             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 470             break;
 471         case SP_ATTR_INKSCAPE_GUIDE_BBOX:
 472             nv->snap_manager.guide.setSnapTo(Inkscape::Snapper::BBOX_POINT, value ? sp_str_to_bool(value) : TRUE);
 473             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 474             break;
 475         case SP_ATTR_INKSCAPE_GUIDE_POINTS:
 476             nv->snap_manager.guide.setSnapTo(Inkscape::Snapper::SNAP_POINT, value ? sp_str_to_bool(value) : FALSE);
 477             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 478             break;
 479         case SP_ATTR_INKSCAPE_OBJECT_BBOX:
 480             nv->snap_manager.object.setSnapTo(Inkscape::Snapper::BBOX_POINT, (value) ? sp_str_to_bool(value) : FALSE);
 481             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 482             break;
 483         case SP_ATTR_INKSCAPE_OBJECT_POINTS:
 484             nv->snap_manager.object.setSnapTo(Inkscape::Snapper::SNAP_POINT, (value) ? sp_str_to_bool(value) : FALSE);
 485             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 486             break;
 487         case SP_ATTR_INKSCAPE_OBJECT_PATHS:
 488             nv->snap_manager.object.setSnapToPaths(value ? sp_str_to_bool(value) : TRUE);
 489             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 490             break;
 491         case SP_ATTR_INKSCAPE_OBJECT_NODES:
 492             nv->snap_manager.object.setSnapToNodes(value ? sp_str_to_bool(value) : TRUE);
 493             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 494             break;
 495         case SP_ATTR_INKSCAPE_CURRENT_LAYER:
 496             nv->default_layer_id = value ? g_quark_from_string(value) : 0;
 497             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 498             break;
 499         case SP_ATTR_INKSCAPE_CONNECTOR_SPACING:
 500             nv->connector_spacing = value ? g_ascii_strtod(value, NULL) :
 501                     defaultConnSpacing;
 502             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 503             break;
 504         case SP_ATTR_INKSCAPE_DOCUMENT_UNITS: {
 505             /* The default unit if the document doesn't override this: e.g. for files saved as
 506              * `plain SVG', or non-inkscape files, or files created by an inkscape 0.40 &
 507              * earlier.
 508              *
 509              * Here we choose `px': useful for screen-destined SVGs, and fewer bug reports
 510              * about "not the same numbers as what's in the SVG file" (at least for documents
 511              * without a viewBox attribute on the root <svg> element).  Similarly, it's also
 512              * the most reliable unit (i.e. least likely to be wrong in different viewing
 513              * conditions) for viewBox-less SVG files given that it's the unit that inkscape
 514              * uses for all coordinates.
 515              *
 516              * For documents that do have a viewBox attribute on the root <svg> element, it
 517              * might be better if we used either viewBox coordinates or if we used the unit of
 518              * say the width attribute of the root <svg> element.  However, these pose problems
 519              * in that they aren't in general absolute units as currently required by
 520              * doc_units.
 521              */
 522             SPUnit const *new_unit = &sp_unit_get_by_id(SP_UNIT_PX);
 523
 524             if (value) {
 525                 SPUnit const *const req_unit = sp_unit_get_by_abbreviation(value);
 526                 if ( req_unit == NULL ) {
 527                     g_warning("Unrecognized unit `%s'", value);
 528                     /* fixme: Document errors should be reported in the status bar or
 529                      * the like (e.g. as per
 530                      * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing); g_log
 531                      * should be only for programmer errors. */
 532                 } else if ( req_unit->base == SP_UNIT_ABSOLUTE ||
 533                             req_unit->base == SP_UNIT_DEVICE     ) {
 534                     new_unit = req_unit;
 535                 } else {
 536                     g_warning("Document units must be absolute like `mm', `pt' or `px', but found `%s'",
 537                               value);
 538                     /* fixme: Don't use g_log (see above). */
 539                 }
 540             }
 541             nv->doc_units = new_unit;
 542             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 543             break;
 544         }
 545         default:
 546             if (((SPObjectClass *) (parent_class))->set) {
 547                 ((SPObjectClass *) (parent_class))->set(object, key, value);
 548             }
 549             break;
 550     }
 551 }
 552
 553 static void sp_namedview_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
 554 {
 555     SPNamedView *nv = (SPNamedView *) object;
 556
 557     if (((SPObjectClass *) (parent_class))->child_added) {
 558         (* ((SPObjectClass *) (parent_class))->child_added)(object, child, ref);
 559     }
 560
 561     const gchar *id = child->attribute("id");
 562     SPObject *no = object->document->getObjectById(id);
 563     g_assert(SP_IS_OBJECT(no));
 564
 565     if (SP_IS_GUIDE(no)) {
 566         SPGuide *g = (SPGuide *) no;
 567         nv->guides = g_slist_prepend(nv->guides, g);
 568         g_object_set(G_OBJECT(g), "color", nv->guidecolor, "hicolor", nv->guidehicolor, NULL);
 569         if (nv->editable) {
 570             for (GSList *l = nv->views; l != NULL; l = l->next) {
 571                 sp_guide_show(g, static_cast<SPDesktop*>(l->data)->guides, (GCallback) sp_dt_guide_event);
 572                 if (static_cast<SPDesktop*>(l->data)->guides_active)
 573                     sp_guide_sensitize(g,
 574                                        sp_desktop_canvas(static_cast<SPDesktop*> (l->data)),
 575                                        TRUE);
 576                 if (nv->showguides) {
 577                     for (GSList *v = SP_GUIDE(g)->views; v != NULL; v = v->next) {
 578                         sp_canvas_item_show(SP_CANVAS_ITEM(v->data));
 579                     }
 580                 } else {
 581                     for (GSList *v = SP_GUIDE(g)->views; v != NULL; v = v->next) {
 582                         sp_canvas_item_hide(SP_CANVAS_ITEM(v->data));
 583                     }
 584                 }
 585             }
 586         }
 587     }
 588 }
 589
 590 static void sp_namedview_remove_child(SPObject *object, Inkscape::XML::Node *child)
 591 {
 592     SPNamedView *nv = (SPNamedView *) object;
 593
 594     GSList **ref = &nv->guides;
 595     for ( GSList *iter = nv->guides ; iter ; iter = iter->next ) {
 596         if ( SP_OBJECT_REPR((SPObject *)iter->data) == child ) {
 597             *ref = iter->next;
 598             iter->next = NULL;
 599             g_slist_free_1(iter);
 600             break;
 601         }
 602         ref = &iter->next;
 603     }
 604
 605     if (((SPObjectClass *) (parent_class))->remove_child) {
 606         (* ((SPObjectClass *) (parent_class))->remove_child)(object, child);
 607     }
 608 }
 609
 610 static Inkscape::XML::Node *sp_namedview_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 611 {
 612     if ( ( flags & SP_OBJECT_WRITE_EXT ) &&
 613          repr != SP_OBJECT_REPR(object) )
 614     {
 615         if (repr) {
 616             repr->mergeFrom(SP_OBJECT_REPR(object), "id");
 617         } else {
 618             repr = SP_OBJECT_REPR(object)->duplicate();
 619         }
 620     }
 621
 622     return repr;
 623 }
 624
 625 void SPNamedView::show(SPDesktop *desktop)
 626 {
 627     for (GSList *l = guides; l != NULL; l = l->next) {
 628         sp_guide_show(SP_GUIDE(l->data), desktop->guides, (GCallback) sp_dt_guide_event);
 629         if (desktop->guides_active) {
 630             sp_guide_sensitize(SP_GUIDE(l->data), sp_desktop_canvas(desktop), TRUE);
 631         }
 632         if (showguides) {
 633             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 634                 sp_canvas_item_show(SP_CANVAS_ITEM(v->data));
 635             }
 636         } else {
 637             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 638                 sp_canvas_item_hide(SP_CANVAS_ITEM(v->data));
 639             }
 640         }
 641     }
 642
 643     views = g_slist_prepend(views, desktop);
 644
 645     SPCanvasItem * item = sp_canvas_item_new(sp_desktop_grid(desktop), INKSCAPE_TYPE_CXYGRID, NULL);
 646     // since we're keeping a copy, we need to bump up the ref count
 647     gtk_object_ref(GTK_OBJECT(item));
 648     gridviews = g_slist_prepend(gridviews, item);
 649
 650     item = sp_canvas_item_new(sp_desktop_grid(desktop), SP_TYPE_CAXONOMGRID, NULL);
 651     // since we're keeping a copy, we need to bump up the ref count
 652     gtk_object_ref(GTK_OBJECT(item));
 653     gridviews = g_slist_prepend(gridviews, item);
 654
 655     sp_namedview_setup_grid(this);
 656 }
 657
 658 #define MIN_ONSCREEN_DISTANCE 50
 659
 660 /*
 661  * Restores window geometry from the document settings
 662  */
 663 void sp_namedview_window_from_document(SPDesktop *desktop)
 664 {
 665     SPNamedView *nv = desktop->namedview;
 666     gint save_geometry = prefs_get_int_attribute("options.savewindowgeometry", "value", 0);
 667
 668     // restore window size and position
 669     if (save_geometry) {
 670         gint w = MIN(gdk_screen_width(), nv->window_width);
 671         gint h = MIN(gdk_screen_height(), nv->window_height);
 672         gint x = MIN(gdk_screen_width() - MIN_ONSCREEN_DISTANCE, nv->window_x);
 673         gint y = MIN(gdk_screen_height() - MIN_ONSCREEN_DISTANCE, nv->window_y);
 674         if (w>0 && h>0 && x>0 && y>0) {
 675             x = MIN(gdk_screen_width() - w, x);
 676             y = MIN(gdk_screen_height() - h, y);
 677         }
 678         if (w>0 && h>0)
 679             desktop->setWindowSize(w, h);
 680         if (x>0 && y>0)
 681             desktop->setWindowPosition(NR::Point(x, y));
 682     }
 683
 684     // restore zoom and view
 685     if (nv->zoom != 0 && nv->zoom != HUGE_VAL && !isNaN(nv->zoom)
 686         && nv->cx != HUGE_VAL && !isNaN(nv->cx)
 687         && nv->cy != HUGE_VAL && !isNaN(nv->cy)) {
 688         desktop->zoom_absolute(nv->cx, nv->cy, nv->zoom);
 689     } else if (sp_desktop_document(desktop)) { // document without saved zoom, zoom to its page
 690         desktop->zoom_page();
 691     }
 692
 693     // cancel any history of zooms up to this point
 694     if (desktop->zooms_past) {
 695         g_list_free(desktop->zooms_past);
 696         desktop->zooms_past = NULL;
 697     }
 698 }
 699
 700 void sp_namedview_update_layers_from_document (SPDesktop *desktop)
 701 {
 702     SPObject *layer = NULL;
 703     SPDocument *document = desktop->doc();
 704     SPNamedView *nv = desktop->namedview;
 705     if ( nv->default_layer_id != 0 ) {
 706         layer = document->getObjectById(g_quark_to_string(nv->default_layer_id));
 707     }
 708     // don't use that object if it's not at least group
 709     if ( !layer || !SP_IS_GROUP(layer) ) {
 710         layer = NULL;
 711     }
 712     // if that didn't work out, look for the topmost layer
 713     if (!layer) {
 714         SPObject *iter = sp_object_first_child(SP_DOCUMENT_ROOT(document));
 715         for ( ; iter ; iter = SP_OBJECT_NEXT(iter) ) {
 716             if (desktop->isLayer(iter)) {
 717                 layer = iter;
 718             }
 719         }
 720     }
 721     if (layer) {
 722         desktop->setCurrentLayer(layer);
 723     }
 724
 725     // FIXME: find a better place to do this
 726     desktop->event_log->updateUndoVerbs();
 727 }
 728
 729 void sp_namedview_document_from_window(SPDesktop *desktop)
 730 {
 731     gint save_geometry = prefs_get_int_attribute("options.savewindowgeometry", "value", 0);
 732     Inkscape::XML::Node *view = SP_OBJECT_REPR(desktop->namedview);
 733     NR::Rect const r = desktop->get_display_area();
 734
 735     // saving window geometry is not undoable
 736     bool saved = sp_document_get_undo_sensitive(sp_desktop_document(desktop));
 737     sp_document_set_undo_sensitive(sp_desktop_document(desktop), false);
 738
 739     sp_repr_set_svg_double(view, "inkscape:zoom", desktop->current_zoom());
 740     sp_repr_set_svg_double(view, "inkscape:cx", r.midpoint()[NR::X]);
 741     sp_repr_set_svg_double(view, "inkscape:cy", r.midpoint()[NR::Y]);
 742
 743     if (save_geometry) {
 744         gint w, h, x, y;
 745         desktop->getWindowGeometry(x, y, w, h);
 746         sp_repr_set_int(view, "inkscape:window-width", w);
 747         sp_repr_set_int(view, "inkscape:window-height", h);
 748         sp_repr_set_int(view, "inkscape:window-x", x);
 749         sp_repr_set_int(view, "inkscape:window-y", y);
 750     }
 751
 752     view->setAttribute("inkscape:current-layer", SP_OBJECT_ID(desktop->currentLayer()));
 753
 754     // restore undoability
 755     sp_document_set_undo_sensitive(sp_desktop_document(desktop), saved);
 756 }
 757
 758 void SPNamedView::hide(SPDesktop const *desktop)
 759 {
 760     g_assert(desktop != NULL);
 761     g_assert(g_slist_find(views, desktop));
 762
 763     for (GSList *l = guides; l != NULL; l = l->next) {
 764         sp_guide_hide(SP_GUIDE(l->data), sp_desktop_canvas(desktop));
 765     }
 766
 767     views = g_slist_remove(views, desktop);
 768
 769     GSList *l;
 770     for (l = gridviews; l != NULL; l = l->next) {
 771         if (SP_CANVAS_ITEM(l->data)->canvas == sp_desktop_canvas(desktop)) {
 772             sp_canvas_item_hide(SP_CANVAS_ITEM(l->data));
 773             gtk_object_unref(GTK_OBJECT(l->data));
 774             gridviews = g_slist_remove(gridviews, l->data);
 775         }
 776     }
 777 }
 778
 779 void SPNamedView::activateGuides(gpointer desktop, gboolean active)
 780 {
 781     g_assert(desktop != NULL);
 782     g_assert(g_slist_find(views, desktop));
 783
 784     SPDesktop *dt = static_cast<SPDesktop*>(desktop);
 785
 786     for (GSList *l = guides; l != NULL; l = l->next) {
 787         sp_guide_sensitize(SP_GUIDE(l->data), sp_desktop_canvas(dt), active);
 788     }
 789 }
 790
 791 static void sp_namedview_setup_guides(SPNamedView *nv)
 792 {
 793     for (GSList *l = nv->guides; l != NULL; l = l->next) {
 794         if (nv->showguides) {
 795             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 796                 sp_canvas_item_show(SP_CANVAS_ITEM(v->data));
 797             }
 798         } else {
 799             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 800                 sp_canvas_item_hide(SP_CANVAS_ITEM(v->data));
 801             }
 802         }
 803     }
 804 }
 805
 806 void sp_namedview_toggle_guides(SPDocument *doc, Inkscape::XML::Node *repr)
 807 {
 808     unsigned int v;
 809     unsigned int set = sp_repr_get_boolean(repr, "showguides", &v);
 810     if (!set) { // hide guides if not specified, for backwards compatibility
 811         v = FALSE;
 812     } else {
 813         v = !v;
 814     }
 815
 816     bool saved = sp_document_get_undo_sensitive(doc);
 817     sp_document_set_undo_sensitive(doc, false);
 818
 819     sp_repr_set_boolean(repr, "showguides", v);
 820
 821     doc->rroot->setAttribute("sodipodi:modified", "true");
 822     sp_document_set_undo_sensitive(doc, saved);
 823 }
 824
 825 void sp_namedview_toggle_grid(SPDocument *doc, Inkscape::XML::Node *repr)
 826 {
 827     unsigned int v;
 828     sp_repr_get_boolean(repr, "showgrid", &v);
 829     v = !v;
 830
 831     bool saved = sp_document_get_undo_sensitive(doc);
 832     sp_document_set_undo_sensitive(doc, false);
 833
 834     sp_repr_set_boolean(repr, "showgrid", v);
 835
 836     doc->rroot->setAttribute("sodipodi:modified", "true");
 837     sp_document_set_undo_sensitive(doc, saved);
 838 }
 839
 840 void sp_namedview_set_gridtype(unsigned int type, SPDocument *doc, Inkscape::XML::Node *repr)
 841 {
 842     bool saved = sp_document_get_undo_sensitive(doc);
 843     sp_document_set_undo_sensitive(doc, false);
 844
 845     sp_repr_set_int(repr, "gridtype", (gint)type);
 846
 847     doc->rroot->setAttribute("sodipodi:modified", "true");
 848     sp_document_set_undo_sensitive(doc, saved);
 849 }
 850
 851 static void sp_namedview_setup_grid(SPNamedView *nv)
 852 {
 853     for (GSList *l = nv->gridviews; l != NULL; l = l->next) {
 854         sp_namedview_setup_grid_item(nv, SP_CANVAS_ITEM(l->data));
 855     }
 856 }
 857
 858 static void sp_namedview_setup_grid_item(SPNamedView *nv, SPCanvasItem *item)
 859 {
 860     bool btype = SP_IS_CAXONOMGRID(GTK_OBJECT(item));
 861
 862     if ( nv->showgrid && (nv->gridtype == btype) ) {
 863         sp_canvas_item_show(item);
 864     } else {
 865         sp_canvas_item_hide(item);
 866     }
 867
 868     sp_canvas_item_set((GtkObject *) item,
 869                        "color", nv->gridcolor,
 870                        "originx", nv->gridorigin[NR::X],
 871                        "originy", nv->gridorigin[NR::Y],
 872                        "spacingy", nv->gridspacing[NR::Y],
 873                        "empcolor", nv->gridempcolor,
 874                        "empspacing", nv->gridempspacing,
 875                        NULL);
 876     if (!btype){
 877         // CXYGRID
 878         sp_canvas_item_set((GtkObject *) item,
 879                            "spacingx", nv->gridspacing[NR::X],
 880                            NULL);
 881     } else {
 882         // CAXONOMGRID
 883         sp_canvas_item_set((GtkObject *) item,
 884                            "anglex", nv->gridangle[0],
 885                            "anglez", nv->gridangle[1],
 886                            NULL);
 887     }
 888 }
 889
 890
 891 gchar const *SPNamedView::getName() const
 892 {
 893     SPException ex;
 894     SP_EXCEPTION_INIT(&ex);
 895     return sp_object_getAttribute(SP_OBJECT(this), "id", &ex);
 896 }
 897
 898 guint SPNamedView::getViewCount()
 899 {
 900     return ++viewcount;
 901 }
 902
 903 GSList const *SPNamedView::getViewList() const
 904 {
 905     return views;
 906 }
 907
 908 /* This should be moved somewhere */
 909
 910 static gboolean sp_str_to_bool(const gchar *str)
 911 {
 912     if (str) {
 913         if (!g_strcasecmp(str, "true") ||
 914             !g_strcasecmp(str, "yes") ||
 915             !g_strcasecmp(str, "y") ||
 916             (atoi(str) != 0)) {
 917             return TRUE;
 918         }
 919     }
 920
 921     return FALSE;
 922 }
 923
 924 /* fixme: Collect all these length parsing methods and think common sane API */
 925
 926 static gboolean sp_nv_read_length(const gchar *str, guint base, gdouble *val, const SPUnit **unit)
 927 {
 928     if (!str) {
 929         return FALSE;
 930     }
 931
 932     gchar *u;
 933     gdouble v = g_ascii_strtod(str, &u);
 934     if (!u) {
 935         return FALSE;
 936     }
 937     while (isspace(*u)) {
 938         u += 1;
 939     }
 940
 941     if (!*u) {
 942         /* No unit specified - keep default */
 943         *val = v;
 944         return TRUE;
 945     }
 946
 947     if (base & SP_UNIT_DEVICE) {
 948         if (u[0] && u[1] && !isalnum(u[2]) && !strncmp(u, "px", 2)) {
 949             *unit = &sp_unit_get_by_id(SP_UNIT_PX);
 950             *val = v;
 951             return TRUE;
 952         }
 953     }
 954
 955     if (base & SP_UNIT_ABSOLUTE) {
 956         if (!strncmp(u, "pt", 2)) {
 957             *unit = &sp_unit_get_by_id(SP_UNIT_PT);
 958         } else if (!strncmp(u, "mm", 2)) {
 959             *unit = &sp_unit_get_by_id(SP_UNIT_MM);
 960         } else if (!strncmp(u, "cm", 2)) {
 961             *unit = &sp_unit_get_by_id(SP_UNIT_CM);
 962         } else if (!strncmp(u, "m", 1)) {
 963             *unit = &sp_unit_get_by_id(SP_UNIT_M);
 964         } else if (!strncmp(u, "in", 2)) {
 965             *unit = &sp_unit_get_by_id(SP_UNIT_IN);
 966         } else {
 967             return FALSE;
 968         }
 969         *val = v;
 970         return TRUE;
 971     }
 972
 973     return FALSE;
 974 }
 975
 976 static gboolean sp_nv_read_opacity(const gchar *str, guint32 *color)
 977 {
 978     if (!str) {
 979         return FALSE;
 980     }
 981
 982     gchar *u;
 983     gdouble v = g_ascii_strtod(str, &u);
 984     if (!u) {
 985         return FALSE;
 986     }
 987     v = CLAMP(v, 0.0, 1.0);
 988
 989     *color = (*color & 0xffffff00) | (guint32) floor(v * 255.9999);
 990
 991     return TRUE;
 992 }
 993
 994 SPNamedView *sp_document_namedview(SPDocument *document, const gchar *id)
 995 {
 996     g_return_val_if_fail(document != NULL, NULL);
 997
 998     SPObject *nv = sp_item_group_get_child_by_name((SPGroup *) document->root, NULL, "sodipodi:namedview");
 999     g_assert(nv != NULL);
1000
1001     if (id == NULL) {
1002         return (SPNamedView *) nv;
1003     }
1004
1005     while (nv && strcmp(nv->id, id)) {
1006         nv = sp_item_group_get_child_by_name((SPGroup *) document->root, nv, "sodipodi:namedview");
1007     }
1008
1009     return (SPNamedView *) nv;
1010 }
1011
1012 /**
1013  * Returns namedview's default metric.
1014  */
1015 SPMetric SPNamedView::getDefaultMetric() const
1016 {
1017     if (doc_units) {
1018         return sp_unit_get_metric(doc_units);
1019     } else {
1020         return SP_PT;
1021     }
1022 }
1023
1024 /*
1025   Local Variables:
1026   mode:c++
1027   c-file-style:"stroustrup"
1028   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1029   indent-tabs-mode:nil
1030   fill-column:99
1031   End:
1032 */
1033 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :