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 "helper/units.h"
  21 #include "svg/svg-color.h"
  22 #include "xml/repr.h"
  23 #include "attributes.h"
  24 #include "document.h"
  25 #include "desktop-events.h"
  26 #include "desktop-handles.h"
  27 #include "event-log.h"
  28 #include "sp-guide.h"
  29 #include "sp-item-group.h"
  30 #include "sp-namedview.h"
  31 #include "prefs-utils.h"
  32 #include "desktop.h"
  33 #include "conn-avoid-ref.h" // for defaultConnSpacing.
  34
  35 #include "isnan.h" //temp fix for isnan().  include last
  36
  37 #define DEFAULTTOLERANCE 0.4
  38 #define DEFAULTGRIDCOLOR 0x3f3fff25
  39 #define DEFAULTGRIDEMPCOLOR 0x3f3fff60
  40 #define DEFAULTGRIDEMPSPACING 5
  41 #define DEFAULTGUIDECOLOR 0x0000ff7f
  42 #define DEFAULTGUIDEHICOLOR 0xff00007f
  43 #define DEFAULTBORDERCOLOR 0x000000ff
  44 #define DEFAULTPAGECOLOR 0xffffff00
  45
  46 static void sp_namedview_class_init(SPNamedViewClass *klass);
  47 static void sp_namedview_init(SPNamedView *namedview);
  48
  49 static void sp_namedview_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr);
  50 static void sp_namedview_release(SPObject *object);
  51 static void sp_namedview_set(SPObject *object, unsigned int key, const gchar *value);
  52 static void sp_namedview_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref);
  53 static void sp_namedview_remove_child(SPObject *object, Inkscape::XML::Node *child);
  54 static Inkscape::XML::Node *sp_namedview_write(SPObject *object, Inkscape::XML::Node *repr, guint flags);
  55
  56 static void sp_namedview_setup_guides(SPNamedView * nv);
  57
  58 static void sp_namedview_setup_grid(SPNamedView * nv);
  59 static void sp_namedview_setup_grid_item(SPNamedView * nv, SPCanvasItem * item);
  60
  61 static gboolean sp_str_to_bool(const gchar *str);
  62 static gboolean sp_nv_read_length(const gchar *str, guint base, gdouble *val, const SPUnit **unit);
  63 static gboolean sp_nv_read_opacity(const gchar *str, guint32 *color);
  64
  65 static SPObjectGroupClass * parent_class;
  66
  67 GType
  68 sp_namedview_get_type()
  69 {
  70     static GType namedview_type = 0;
  71     if (!namedview_type) {
  72         GTypeInfo namedview_info = {
  73             sizeof(SPNamedViewClass),
  74             NULL,       /* base_init */
  75             NULL,       /* base_finalize */
  76             (GClassInitFunc) sp_namedview_class_init,
  77             NULL,       /* class_finalize */
  78             NULL,       /* class_data */
  79             sizeof(SPNamedView),
  80             16, /* n_preallocs */
  81             (GInstanceInitFunc) sp_namedview_init,
  82             NULL,       /* value_table */
  83         };
  84         namedview_type = g_type_register_static(SP_TYPE_OBJECTGROUP, "SPNamedView", &namedview_info, (GTypeFlags)0);
  85     }
  86     return namedview_type;
  87 }
  88
  89 static void sp_namedview_class_init(SPNamedViewClass * klass)
  90 {
  91     GObjectClass * gobject_class;
  92     SPObjectClass * sp_object_class;
  93
  94     gobject_class = (GObjectClass *) klass;
  95     sp_object_class = (SPObjectClass *) klass;
  96
  97     parent_class = (SPObjectGroupClass*) g_type_class_ref(SP_TYPE_OBJECTGROUP);
  98
  99     sp_object_class->build = sp_namedview_build;
 100     sp_object_class->release = sp_namedview_release;
 101     sp_object_class->set = sp_namedview_set;
 102     sp_object_class->child_added = sp_namedview_child_added;
 103     sp_object_class->remove_child = sp_namedview_remove_child;
 104     sp_object_class->write = sp_namedview_write;
 105 }
 106
 107 static void sp_namedview_init(SPNamedView *nv)
 108 {
 109     nv->editable = TRUE;
 110     nv->showgrid = FALSE;
 111     nv->showguides = TRUE;
 112     nv->showborder = TRUE;
 113     nv->showpageshadow = TRUE;
 114
 115     nv->guides = NULL;
 116     nv->viewcount = 0;
 117     nv->grids = NULL;
 118
 119     nv->default_layer_id = 0;
 120
 121     nv->connector_spacing = defaultConnSpacing;
 122
 123     new (&nv->snap_manager) SnapManager(nv);
 124 }
 125
 126 static void sp_namedview_build(SPObject *object, SPDocument *document, Inkscape::XML::Node *repr)
 127 {
 128     SPNamedView *nv = (SPNamedView *) object;
 129     SPObjectGroup *og = (SPObjectGroup *) object;
 130
 131     if (((SPObjectClass *) (parent_class))->build) {
 132         (* ((SPObjectClass *) (parent_class))->build)(object, document, repr);
 133     }
 134
 135     sp_object_read_attr(object, "inkscape:document-units");
 136     sp_object_read_attr(object, "viewonly");
 137     sp_object_read_attr(object, "showgrid");
 138     sp_object_read_attr(object, "showguides");
 139     sp_object_read_attr(object, "gridtolerance");
 140     sp_object_read_attr(object, "guidetolerance");
 141     sp_object_read_attr(object, "objecttolerance");
 142     sp_object_read_attr(object, "inkscape:has_abs_tolerance");
 143     sp_object_read_attr(object, "gridoriginx");
 144     sp_object_read_attr(object, "gridoriginy");
 145     sp_object_read_attr(object, "gridspacingx");
 146     sp_object_read_attr(object, "gridspacingy");
 147     sp_object_read_attr(object, "gridempspacing");
 148     sp_object_read_attr(object, "gridcolor");
 149     sp_object_read_attr(object, "gridempcolor");
 150     sp_object_read_attr(object, "gridopacity");
 151     sp_object_read_attr(object, "gridempopacity");
 152     sp_object_read_attr(object, "guidecolor");
 153     sp_object_read_attr(object, "guideopacity");
 154     sp_object_read_attr(object, "guidehicolor");
 155     sp_object_read_attr(object, "guidehiopacity");
 156     sp_object_read_attr(object, "showborder");
 157     sp_object_read_attr(object, "inkscape:showpageshadow");
 158     sp_object_read_attr(object, "borderlayer");
 159     sp_object_read_attr(object, "bordercolor");
 160     sp_object_read_attr(object, "borderopacity");
 161     sp_object_read_attr(object, "pagecolor");
 162     sp_object_read_attr(object, "inkscape:pageopacity");
 163     sp_object_read_attr(object, "inkscape:pageshadow");
 164     sp_object_read_attr(object, "inkscape:zoom");
 165     sp_object_read_attr(object, "inkscape:cx");
 166     sp_object_read_attr(object, "inkscape:cy");
 167     sp_object_read_attr(object, "inkscape:window-width");
 168     sp_object_read_attr(object, "inkscape:window-height");
 169     sp_object_read_attr(object, "inkscape:window-x");
 170     sp_object_read_attr(object, "inkscape:window-y");
 171     sp_object_read_attr(object, "inkscape:grid-bbox");
 172     sp_object_read_attr(object, "inkscape:guide-bbox");
 173     sp_object_read_attr(object, "inkscape:object-bbox");
 174     sp_object_read_attr(object, "inkscape:grid-points");
 175     sp_object_read_attr(object, "inkscape:guide-points");
 176     sp_object_read_attr(object, "inkscape:object-points");
 177     sp_object_read_attr(object, "inkscape:object-paths");
 178     sp_object_read_attr(object, "inkscape:object-nodes");
 179     sp_object_read_attr(object, "inkscape:current-layer");
 180     sp_object_read_attr(object, "inkscape:connector-spacing");
 181
 182     /* Construct guideline list */
 183
 184     for (SPObject *o = sp_object_first_child(SP_OBJECT(og)) ; o != NULL; o = SP_OBJECT_NEXT(o) ) {
 185         if (SP_IS_GUIDE(o)) {
 186             SPGuide * g = SP_GUIDE(o);
 187             nv->guides = g_slist_prepend(nv->guides, g);
 188             g_object_set(G_OBJECT(g), "color", nv->guidecolor, "hicolor", nv->guidehicolor, NULL);
 189         }
 190     }
 191 }
 192
 193 static void sp_namedview_release(SPObject *object)
 194 {
 195     SPNamedView *namedview = (SPNamedView *) object;
 196
 197     if (namedview->guides) {
 198         g_slist_free(namedview->guides);
 199         namedview->guides = NULL;
 200     }
 201
 202     while (namedview->gridviews) {
 203         gtk_object_unref(GTK_OBJECT(namedview->gridviews->data));
 204         namedview->gridviews = g_slist_remove(namedview->gridviews, namedview->gridviews->data);
 205     }
 206
 207     // delete grids:
 208     while ( namedview->grids ) {
 209         Inkscape::CanvasGrid *gr = (Inkscape::CanvasGrid *)namedview->grids->data;
 210         delete gr;
 211         namedview->grids = g_slist_remove_link(namedview->grids, namedview->grids);
 212     }
 213
 214     if (((SPObjectClass *) parent_class)->release) {
 215         ((SPObjectClass *) parent_class)->release(object);
 216     }
 217
 218     namedview->snap_manager.~SnapManager();
 219 }
 220
 221 static void sp_namedview_set(SPObject *object, unsigned int key, const gchar *value)
 222 {
 223     SPNamedView *nv = SP_NAMEDVIEW(object);
 224     SPUnit const &px = sp_unit_get_by_id(SP_UNIT_PX);
 225
 226     switch (key) {
 227         case SP_ATTR_VIEWONLY:
 228             nv->editable = (!value);
 229             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 230             break;
 231         case SP_ATTR_SHOWGRID:
 232             nv->showgrid = sp_str_to_bool(value);
 233             sp_namedview_setup_grid(nv);
 234             /* Disable grid snaps if the grid is turned off */
 235             nv->snap_manager.grid.setEnabled(nv->showgrid);
 236             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 237             break;
 238         case SP_ATTR_SHOWGUIDES:
 239             if (!value) { // show guides if not specified, for backwards compatibility
 240                 nv->showguides = TRUE;
 241             } else {
 242                 nv->showguides = sp_str_to_bool(value);
 243             }
 244             sp_namedview_setup_guides(nv);
 245             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 246             break;
 247         case SP_ATTR_GRIDTOLERANCE:
 248             nv->gridtoleranceunit = &px;
 249             nv->gridtolerance = DEFAULTTOLERANCE;
 250             if (value) {
 251                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->gridtolerance, &nv->gridtoleranceunit);
 252             }
 253             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 254             break;
 255         case SP_ATTR_GUIDETOLERANCE:
 256             nv->guidetoleranceunit = &px;
 257             nv->guidetolerance = DEFAULTTOLERANCE;
 258             if (value) {
 259                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->guidetolerance, &nv->guidetoleranceunit);
 260             }
 261             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 262             break;
 263         case SP_ATTR_OBJECTTOLERANCE:
 264             nv->objecttoleranceunit = &px;
 265             nv->objecttolerance = DEFAULTTOLERANCE;
 266             if (value) {
 267                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->objecttolerance, &nv->objecttoleranceunit);
 268             }
 269             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 270             break;
 271         case SP_ATTR_ABS_TOLERANCE:
 272              if (!value)
 273                  nv->has_abs_tolerance = true;
 274              else
 275                  nv->has_abs_tolerance = (sp_str_to_bool (value) == TRUE);
 276              object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 277              break;
 278         case SP_ATTR_GRIDORIGINX:
 279         case SP_ATTR_GRIDORIGINY:
 280         {
 281             unsigned const d = (key == SP_ATTR_GRIDORIGINY);
 282             nv->gridunit = nv->doc_units;
 283             nv->gridorigin[d] = 0.0;
 284             if (value) {
 285                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->gridorigin[d], &nv->gridunit);
 286             }
 287             nv->gridorigin[d] = sp_units_get_pixels(nv->gridorigin[d], *(nv->gridunit));
 288             sp_namedview_setup_grid(nv);
 289             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 290             break;
 291         }
 292         case SP_ATTR_GRIDSPACINGX:
 293         case SP_ATTR_GRIDSPACINGY:
 294         {
 295             unsigned const d = (key == SP_ATTR_GRIDSPACINGY);
 296             nv->gridunit = nv->doc_units;
 297             nv->gridspacing[d] = 1.0;
 298             if (value) {
 299                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->gridspacing[d], &nv->gridunit);
 300             }
 301             nv->gridspacing[d] = sp_units_get_pixels(nv->gridspacing[d], *(nv->gridunit));
 302             sp_namedview_setup_grid(nv);
 303             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 304             break;
 305         }
 306     case SP_ATTR_GRIDCOLOR:
 307             nv->gridcolor = (nv->gridcolor & 0xff) | (DEFAULTGRIDCOLOR & 0xffffff00);
 308             if (value) {
 309                 nv->gridcolor = (nv->gridcolor & 0xff) | sp_svg_read_color(value, nv->gridcolor);
 310             }
 311             sp_namedview_setup_grid(nv);
 312             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 313             break;
 314         case SP_ATTR_GRIDEMPCOLOR:
 315             nv->gridempcolor = (nv->gridempcolor & 0xff) | (DEFAULTGRIDEMPCOLOR & 0xffffff00);
 316             if (value) {
 317                 nv->gridempcolor = (nv->gridempcolor & 0xff) | sp_svg_read_color(value, nv->gridempcolor);
 318             }
 319             sp_namedview_setup_grid(nv);
 320             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 321             break;
 322         case SP_ATTR_GRIDOPACITY:
 323             nv->gridcolor = (nv->gridcolor & 0xffffff00) | (DEFAULTGRIDCOLOR & 0xff);
 324             sp_nv_read_opacity(value, &nv->gridcolor);
 325             sp_namedview_setup_grid(nv);
 326             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 327             break;
 328         case SP_ATTR_GRIDEMPOPACITY:
 329             nv->gridempcolor = (nv->gridempcolor & 0xffffff00) | (DEFAULTGRIDEMPCOLOR & 0xff);
 330             sp_nv_read_opacity(value, &nv->gridempcolor);
 331             sp_namedview_setup_grid(nv);
 332             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 333             break;
 334         case SP_ATTR_GRIDEMPSPACING:
 335             nv->gridempspacing = DEFAULTGRIDEMPSPACING;
 336             if (value != NULL)
 337                 nv->gridempspacing = atoi(value);
 338             sp_namedview_setup_grid(nv);
 339             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 340             break;
 341         case SP_ATTR_GUIDECOLOR:
 342             nv->guidecolor = (nv->guidecolor & 0xff) | (DEFAULTGUIDECOLOR & 0xffffff00);
 343             if (value) {
 344                 nv->guidecolor = (nv->guidecolor & 0xff) | sp_svg_read_color(value, nv->guidecolor);
 345             }
 346             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 347                 g_object_set(G_OBJECT(l->data), "color", nv->guidecolor, NULL);
 348             }
 349             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 350             break;
 351         case SP_ATTR_GUIDEOPACITY:
 352             nv->guidecolor = (nv->guidecolor & 0xffffff00) | (DEFAULTGUIDECOLOR & 0xff);
 353             sp_nv_read_opacity(value, &nv->guidecolor);
 354             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 355                 g_object_set(G_OBJECT(l->data), "color", nv->guidecolor, NULL);
 356             }
 357             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 358             break;
 359         case SP_ATTR_GUIDEHICOLOR:
 360             nv->guidehicolor = (nv->guidehicolor & 0xff) | (DEFAULTGUIDEHICOLOR & 0xffffff00);
 361             if (value) {
 362                 nv->guidehicolor = (nv->guidehicolor & 0xff) | sp_svg_read_color(value, nv->guidehicolor);
 363             }
 364             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 365                 g_object_set(G_OBJECT(l->data), "hicolor", nv->guidehicolor, NULL);
 366             }
 367             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 368             break;
 369         case SP_ATTR_GUIDEHIOPACITY:
 370             nv->guidehicolor = (nv->guidehicolor & 0xffffff00) | (DEFAULTGUIDEHICOLOR & 0xff);
 371             sp_nv_read_opacity(value, &nv->guidehicolor);
 372             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 373                 g_object_set(G_OBJECT(l->data), "hicolor", nv->guidehicolor, NULL);
 374             }
 375             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 376             break;
 377         case SP_ATTR_SHOWBORDER:
 378             nv->showborder = (value) ? sp_str_to_bool (value) : TRUE;
 379             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 380             break;
 381         case SP_ATTR_BORDERLAYER:
 382             nv->borderlayer = SP_BORDER_LAYER_BOTTOM;
 383             if (value && !strcasecmp(value, "true")) nv->borderlayer = SP_BORDER_LAYER_TOP;
 384             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 385             break;
 386         case SP_ATTR_BORDERCOLOR:
 387             nv->bordercolor = (nv->bordercolor & 0xff) | (DEFAULTBORDERCOLOR & 0xffffff00);
 388             if (value) {
 389                 nv->bordercolor = (nv->bordercolor & 0xff) | sp_svg_read_color (value, nv->bordercolor);
 390             }
 391             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 392             break;
 393         case SP_ATTR_BORDEROPACITY:
 394             nv->bordercolor = (nv->bordercolor & 0xffffff00) | (DEFAULTBORDERCOLOR & 0xff);
 395             sp_nv_read_opacity(value, &nv->bordercolor);
 396             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 397             break;
 398         case SP_ATTR_PAGECOLOR:
 399             nv->pagecolor = (nv->pagecolor & 0xff) | (DEFAULTPAGECOLOR & 0xffffff00);
 400             if (value) {
 401                 nv->pagecolor = (nv->pagecolor & 0xff) | sp_svg_read_color(value, nv->pagecolor);
 402             }
 403             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 404             break;
 405         case SP_ATTR_INKSCAPE_PAGEOPACITY:
 406             nv->pagecolor = (nv->pagecolor & 0xffffff00) | (DEFAULTPAGECOLOR & 0xff);
 407             sp_nv_read_opacity(value, &nv->pagecolor);
 408             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 409             break;
 410         case SP_ATTR_INKSCAPE_PAGESHADOW:
 411             nv->pageshadow = value? atoi(value) : 2; // 2 is the default
 412             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 413             break;
 414         case SP_ATTR_SHOWPAGESHADOW:
 415             nv->showpageshadow = (value) ? sp_str_to_bool(value) : TRUE;
 416             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 417             break;
 418         case SP_ATTR_INKSCAPE_ZOOM:
 419             nv->zoom = value ? g_ascii_strtod(value, NULL) : 0; // zero means not set
 420             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 421             break;
 422         case SP_ATTR_INKSCAPE_CX:
 423             nv->cx = value ? g_ascii_strtod(value, NULL) : HUGE_VAL; // HUGE_VAL means not set
 424             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 425             break;
 426         case SP_ATTR_INKSCAPE_CY:
 427             nv->cy = value ? g_ascii_strtod(value, NULL) : HUGE_VAL; // HUGE_VAL means not set
 428             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 429             break;
 430         case SP_ATTR_INKSCAPE_WINDOW_WIDTH:
 431             nv->window_width = value? atoi(value) : -1; // -1 means not set
 432             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 433             break;
 434         case SP_ATTR_INKSCAPE_WINDOW_HEIGHT:
 435             nv->window_height = value ? atoi(value) : -1; // -1 means not set
 436             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 437             break;
 438         case SP_ATTR_INKSCAPE_WINDOW_X:
 439             nv->window_x = value ? atoi(value) : -1; // -1 means not set
 440             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 441             break;
 442         case SP_ATTR_INKSCAPE_WINDOW_Y:
 443             nv->window_y = value ? atoi(value) : -1; // -1 means not set
 444             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 445             break;
 446         case SP_ATTR_INKSCAPE_GRID_BBOX:
 447             nv->snap_manager.grid.setSnapTo(Inkscape::Snapper::BBOX_POINT, value ? sp_str_to_bool(value) : TRUE);
 448             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 449             break;
 450         case SP_ATTR_INKSCAPE_GRID_POINTS:
 451             nv->snap_manager.grid.setSnapTo(Inkscape::Snapper::SNAP_POINT, value ? sp_str_to_bool(value) : FALSE);
 452             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 453             break;
 454         case SP_ATTR_INKSCAPE_GUIDE_BBOX:
 455             nv->snap_manager.guide.setSnapTo(Inkscape::Snapper::BBOX_POINT, value ? sp_str_to_bool(value) : TRUE);
 456             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 457             break;
 458         case SP_ATTR_INKSCAPE_GUIDE_POINTS:
 459             nv->snap_manager.guide.setSnapTo(Inkscape::Snapper::SNAP_POINT, value ? sp_str_to_bool(value) : FALSE);
 460             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 461             break;
 462         case SP_ATTR_INKSCAPE_OBJECT_BBOX:
 463             nv->snap_manager.object.setSnapTo(Inkscape::Snapper::BBOX_POINT, (value) ? sp_str_to_bool(value) : FALSE);
 464             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 465             break;
 466         case SP_ATTR_INKSCAPE_OBJECT_POINTS:
 467             nv->snap_manager.object.setSnapTo(Inkscape::Snapper::SNAP_POINT, (value) ? sp_str_to_bool(value) : FALSE);
 468             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 469             break;
 470         case SP_ATTR_INKSCAPE_OBJECT_PATHS:
 471             nv->snap_manager.object.setSnapToPaths(value ? sp_str_to_bool(value) : TRUE);
 472             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 473             break;
 474         case SP_ATTR_INKSCAPE_OBJECT_NODES:
 475             nv->snap_manager.object.setSnapToNodes(value ? sp_str_to_bool(value) : TRUE);
 476             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 477             break;
 478         case SP_ATTR_INKSCAPE_CURRENT_LAYER:
 479             nv->default_layer_id = value ? g_quark_from_string(value) : 0;
 480             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 481             break;
 482         case SP_ATTR_INKSCAPE_CONNECTOR_SPACING:
 483             nv->connector_spacing = value ? g_ascii_strtod(value, NULL) :
 484                     defaultConnSpacing;
 485             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 486             break;
 487         case SP_ATTR_INKSCAPE_DOCUMENT_UNITS: {
 488             /* The default unit if the document doesn't override this: e.g. for files saved as
 489              * `plain SVG', or non-inkscape files, or files created by an inkscape 0.40 &
 490              * earlier.
 491              *
 492              * Here we choose `px': useful for screen-destined SVGs, and fewer bug reports
 493              * about "not the same numbers as what's in the SVG file" (at least for documents
 494              * without a viewBox attribute on the root <svg> element).  Similarly, it's also
 495              * the most reliable unit (i.e. least likely to be wrong in different viewing
 496              * conditions) for viewBox-less SVG files given that it's the unit that inkscape
 497              * uses for all coordinates.
 498              *
 499              * For documents that do have a viewBox attribute on the root <svg> element, it
 500              * might be better if we used either viewBox coordinates or if we used the unit of
 501              * say the width attribute of the root <svg> element.  However, these pose problems
 502              * in that they aren't in general absolute units as currently required by
 503              * doc_units.
 504              */
 505             SPUnit const *new_unit = &sp_unit_get_by_id(SP_UNIT_PX);
 506
 507             if (value) {
 508                 SPUnit const *const req_unit = sp_unit_get_by_abbreviation(value);
 509                 if ( req_unit == NULL ) {
 510                     g_warning("Unrecognized unit `%s'", value);
 511                     /* fixme: Document errors should be reported in the status bar or
 512                      * the like (e.g. as per
 513                      * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing); g_log
 514                      * should be only for programmer errors. */
 515                 } else if ( req_unit->base == SP_UNIT_ABSOLUTE ||
 516                             req_unit->base == SP_UNIT_DEVICE     ) {
 517                     new_unit = req_unit;
 518                 } else {
 519                     g_warning("Document units must be absolute like `mm', `pt' or `px', but found `%s'",
 520                               value);
 521                     /* fixme: Don't use g_log (see above). */
 522                 }
 523             }
 524             nv->doc_units = new_unit;
 525             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 526             break;
 527         }
 528         default:
 529             if (((SPObjectClass *) (parent_class))->set) {
 530                 ((SPObjectClass *) (parent_class))->set(object, key, value);
 531             }
 532             break;
 533     }
 534 }
 535
 536 static void sp_namedview_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
 537 {
 538 g_message("named view:: child added");
 539
 540     SPNamedView *nv = (SPNamedView *) object;
 541
 542     if (((SPObjectClass *) (parent_class))->child_added) {
 543         (* ((SPObjectClass *) (parent_class))->child_added)(object, child, ref);
 544     }
 545
 546     const gchar *id = child->attribute("id");
 547     if (!strcmp(child->name(), "inkscape:grid")) {
 548         // check for which grid-type
 549         Inkscape::CanvasGrid* addedgrid;
 550         const char * gridtype = child->attribute("type");
 551         if (!gridtype) {
 552             gridtype = "xygrid"; // use this as default gridtype when none is specified
 553             child->setAttribute("type", gridtype);
 554         }
 555         addedgrid = Inkscape::CanvasGrid::NewGrid( (SPDesktop*) nv->views->data, child, gridtype);
 556         if (addedgrid) {
 557             nv->grids = g_slist_append(nv->grids, addedgrid);
 558             addedgrid->show();
 559         }
 560     } else {
 561         SPObject *no = object->document->getObjectById(id);
 562         g_assert(SP_IS_OBJECT(no));
 563
 564         if (SP_IS_GUIDE(no)) {
 565             SPGuide *g = (SPGuide *) no;
 566             nv->guides = g_slist_prepend(nv->guides, g);
 567             g_object_set(G_OBJECT(g), "color", nv->guidecolor, "hicolor", nv->guidehicolor, NULL);
 568             if (nv->editable) {
 569                 for (GSList *l = nv->views; l != NULL; l = l->next) {
 570                     sp_guide_show(g, static_cast<SPDesktop*>(l->data)->guides, (GCallback) sp_dt_guide_event);
 571                     if (static_cast<SPDesktop*>(l->data)->guides_active)
 572                         sp_guide_sensitize(g,
 573                                            sp_desktop_canvas(static_cast<SPDesktop*> (l->data)),
 574                                            TRUE);
 575                     if (nv->showguides) {
 576                         for (GSList *v = SP_GUIDE(g)->views; v != NULL; v = v->next) {
 577                             sp_canvas_item_show(SP_CANVAS_ITEM(v->data));
 578                         }
 579                     } else {
 580                         for (GSList *v = SP_GUIDE(g)->views; v != NULL; v = v->next) {
 581                             sp_canvas_item_hide(SP_CANVAS_ITEM(v->data));
 582                         }
 583                     }
 584                 }
 585             }
 586         }
 587     }
 588 }
 589
 590 static void sp_namedview_remove_child(SPObject *object, Inkscape::XML::Node *child)
 591 {
 592 g_message("named view:: child removed");
 593     SPNamedView *nv = (SPNamedView *) object;
 594
 595     if (!strcmp(child->name(), "inkscape:grid")) {
 596         for ( GSList *iter = nv->grids ; iter ; iter = iter->next ) {
 597             Inkscape::CanvasGrid *gr = (Inkscape::CanvasGrid *)iter->data;
 598             if ( gr->repr == child ) {
 599                 delete gr;
 600                 nv->grids = g_slist_remove_link(nv->grids, iter);
 601                 break;
 602             }
 603         }
 604     } else {
 605         GSList **ref = &nv->guides;
 606         for ( GSList *iter = nv->guides ; iter ; iter = iter->next ) {
 607             if ( SP_OBJECT_REPR((SPObject *)iter->data) == child ) {
 608                 *ref = iter->next;
 609                 iter->next = NULL;
 610                 g_slist_free_1(iter);
 611                 break;
 612             }
 613             ref = &iter->next;
 614         }
 615     }
 616
 617     if (((SPObjectClass *) (parent_class))->remove_child) {
 618         (* ((SPObjectClass *) (parent_class))->remove_child)(object, child);
 619     }
 620 }
 621
 622 static Inkscape::XML::Node *sp_namedview_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 623 {
 624     if ( ( flags & SP_OBJECT_WRITE_EXT ) &&
 625          repr != SP_OBJECT_REPR(object) )
 626     {
 627         if (repr) {
 628             repr->mergeFrom(SP_OBJECT_REPR(object), "id");
 629         } else {
 630              /// \todo FIXME:  Plumb an appropriate XML::Document into this
 631              repr = SP_OBJECT_REPR(object)->duplicate(NULL);
 632         }
 633     }
 634
 635     return repr;
 636 }
 637
 638 void SPNamedView::show(SPDesktop *desktop)
 639 {
 640     for (GSList *l = guides; l != NULL; l = l->next) {
 641         sp_guide_show(SP_GUIDE(l->data), desktop->guides, (GCallback) sp_dt_guide_event);
 642         if (desktop->guides_active) {
 643             sp_guide_sensitize(SP_GUIDE(l->data), sp_desktop_canvas(desktop), TRUE);
 644         }
 645         if (showguides) {
 646             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 647                 sp_canvas_item_show(SP_CANVAS_ITEM(v->data));
 648             }
 649         } else {
 650             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 651                 sp_canvas_item_hide(SP_CANVAS_ITEM(v->data));
 652             }
 653         }
 654     }
 655
 656     views = g_slist_prepend(views, desktop);
 657
 658     SPCanvasItem * item = sp_canvas_item_new(sp_desktop_grid(desktop), INKSCAPE_TYPE_CXYGRID, NULL);
 659     // since we're keeping a copy, we need to bump up the ref count
 660     gtk_object_ref(GTK_OBJECT(item));
 661     gridviews = g_slist_prepend(gridviews, item);
 662
 663     // generate grids specified in SVG:
 664     Inkscape::XML::Node *repr = SP_OBJECT_REPR(this);
 665     if (repr) {
 666         for (Inkscape::XML::Node * child = repr->firstChild() ; child != NULL; child = child->next() ) {
 667             if (!strcmp(child->name(), "inkscape:grid")) {
 668                 Inkscape::CanvasXYGrid* addedgrid = new Inkscape::CanvasXYGrid(desktop, child);
 669                 if (addedgrid) {
 670                     grids = g_slist_append(grids, addedgrid);
 671                     addedgrid->enabled = true;
 672                     addedgrid->show();
 673                 }
 674             }
 675         }
 676     }
 677
 678
 679     sp_namedview_setup_grid(this);
 680 }
 681
 682 #define MIN_ONSCREEN_DISTANCE 50
 683
 684 /*
 685  * Restores window geometry from the document settings
 686  */
 687 void sp_namedview_window_from_document(SPDesktop *desktop)
 688 {
 689     SPNamedView *nv = desktop->namedview;
 690     gint save_geometry = prefs_get_int_attribute("options.savewindowgeometry", "value", 0);
 691
 692     // restore window size and position
 693     if (save_geometry) {
 694         gint w = MIN(gdk_screen_width(), nv->window_width);
 695         gint h = MIN(gdk_screen_height(), nv->window_height);
 696         gint x = MIN(gdk_screen_width() - MIN_ONSCREEN_DISTANCE, nv->window_x);
 697         gint y = MIN(gdk_screen_height() - MIN_ONSCREEN_DISTANCE, nv->window_y);
 698         if (w>0 && h>0 && x>0 && y>0) {
 699             x = MIN(gdk_screen_width() - w, x);
 700             y = MIN(gdk_screen_height() - h, y);
 701         }
 702         if (w>0 && h>0)
 703             desktop->setWindowSize(w, h);
 704         if (x>0 && y>0)
 705             desktop->setWindowPosition(NR::Point(x, y));
 706     }
 707
 708     // restore zoom and view
 709     if (nv->zoom != 0 && nv->zoom != HUGE_VAL && !isNaN(nv->zoom)
 710         && nv->cx != HUGE_VAL && !isNaN(nv->cx)
 711         && nv->cy != HUGE_VAL && !isNaN(nv->cy)) {
 712         desktop->zoom_absolute(nv->cx, nv->cy, nv->zoom);
 713     } else if (sp_desktop_document(desktop)) { // document without saved zoom, zoom to its page
 714         desktop->zoom_page();
 715     }
 716
 717     // cancel any history of zooms up to this point
 718     if (desktop->zooms_past) {
 719         g_list_free(desktop->zooms_past);
 720         desktop->zooms_past = NULL;
 721     }
 722 }
 723
 724 void sp_namedview_update_layers_from_document (SPDesktop *desktop)
 725 {
 726     SPObject *layer = NULL;
 727     SPDocument *document = desktop->doc();
 728     SPNamedView *nv = desktop->namedview;
 729     if ( nv->default_layer_id != 0 ) {
 730         layer = document->getObjectById(g_quark_to_string(nv->default_layer_id));
 731     }
 732     // don't use that object if it's not at least group
 733     if ( !layer || !SP_IS_GROUP(layer) ) {
 734         layer = NULL;
 735     }
 736     // if that didn't work out, look for the topmost layer
 737     if (!layer) {
 738         SPObject *iter = sp_object_first_child(SP_DOCUMENT_ROOT(document));
 739         for ( ; iter ; iter = SP_OBJECT_NEXT(iter) ) {
 740             if (desktop->isLayer(iter)) {
 741                 layer = iter;
 742             }
 743         }
 744     }
 745     if (layer) {
 746         desktop->setCurrentLayer(layer);
 747     }
 748
 749     // FIXME: find a better place to do this
 750     desktop->event_log->updateUndoVerbs();
 751 }
 752
 753 void sp_namedview_document_from_window(SPDesktop *desktop)
 754 {
 755     gint save_geometry = prefs_get_int_attribute("options.savewindowgeometry", "value", 0);
 756     Inkscape::XML::Node *view = SP_OBJECT_REPR(desktop->namedview);
 757     NR::Rect const r = desktop->get_display_area();
 758
 759     // saving window geometry is not undoable
 760     bool saved = sp_document_get_undo_sensitive(sp_desktop_document(desktop));
 761     sp_document_set_undo_sensitive(sp_desktop_document(desktop), false);
 762
 763     sp_repr_set_svg_double(view, "inkscape:zoom", desktop->current_zoom());
 764     sp_repr_set_svg_double(view, "inkscape:cx", r.midpoint()[NR::X]);
 765     sp_repr_set_svg_double(view, "inkscape:cy", r.midpoint()[NR::Y]);
 766
 767     if (save_geometry) {
 768         gint w, h, x, y;
 769         desktop->getWindowGeometry(x, y, w, h);
 770         sp_repr_set_int(view, "inkscape:window-width", w);
 771         sp_repr_set_int(view, "inkscape:window-height", h);
 772         sp_repr_set_int(view, "inkscape:window-x", x);
 773         sp_repr_set_int(view, "inkscape:window-y", y);
 774     }
 775
 776     view->setAttribute("inkscape:current-layer", SP_OBJECT_ID(desktop->currentLayer()));
 777
 778     // restore undoability
 779     sp_document_set_undo_sensitive(sp_desktop_document(desktop), saved);
 780 }
 781
 782 void SPNamedView::hide(SPDesktop const *desktop)
 783 {
 784     g_assert(desktop != NULL);
 785     g_assert(g_slist_find(views, desktop));
 786
 787     for (GSList *l = guides; l != NULL; l = l->next) {
 788         sp_guide_hide(SP_GUIDE(l->data), sp_desktop_canvas(desktop));
 789     }
 790
 791     views = g_slist_remove(views, desktop);
 792
 793     GSList *l;
 794     for (l = gridviews; l != NULL; l = l->next) {
 795         if (! l->data) {
 796             continue;
 797         }
 798         SPCanvasItem *item = static_cast<SPCanvasItem*>(l->data);
 799
 800         if (item->canvas == sp_desktop_canvas(desktop)) {
 801             sp_canvas_item_hide(SP_CANVAS_ITEM(l->data));
 802             gtk_object_unref(GTK_OBJECT(l->data));
 803             gridviews = g_slist_remove(gridviews, l->data);
 804         }
 805     }
 806
 807     // delete grids:
 808     while ( grids ) {
 809         Inkscape::CanvasGrid *gr = (Inkscape::CanvasGrid *)grids->data;
 810         delete gr;
 811         grids = g_slist_remove_link(grids, grids);
 812     }
 813 }
 814
 815 void SPNamedView::activateGuides(gpointer desktop, gboolean active)
 816 {
 817     g_assert(desktop != NULL);
 818     g_assert(g_slist_find(views, desktop));
 819
 820     SPDesktop *dt = static_cast<SPDesktop*>(desktop);
 821
 822     for (GSList *l = guides; l != NULL; l = l->next) {
 823         sp_guide_sensitize(SP_GUIDE(l->data), sp_desktop_canvas(dt), active);
 824     }
 825 }
 826
 827 static void sp_namedview_setup_guides(SPNamedView *nv)
 828 {
 829     for (GSList *l = nv->guides; l != NULL; l = l->next) {
 830         if (nv->showguides) {
 831             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 832                 sp_canvas_item_show(SP_CANVAS_ITEM(v->data));
 833             }
 834         } else {
 835             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 836                 sp_canvas_item_hide(SP_CANVAS_ITEM(v->data));
 837             }
 838         }
 839     }
 840 }
 841
 842 void sp_namedview_toggle_guides(SPDocument *doc, Inkscape::XML::Node *repr)
 843 {
 844     unsigned int v;
 845     unsigned int set = sp_repr_get_boolean(repr, "showguides", &v);
 846     if (!set) { // hide guides if not specified, for backwards compatibility
 847         v = FALSE;
 848     } else {
 849         v = !v;
 850     }
 851
 852     bool saved = sp_document_get_undo_sensitive(doc);
 853     sp_document_set_undo_sensitive(doc, false);
 854
 855     sp_repr_set_boolean(repr, "showguides", v);
 856
 857     doc->rroot->setAttribute("sodipodi:modified", "true");
 858     sp_document_set_undo_sensitive(doc, saved);
 859 }
 860
 861 void sp_namedview_toggle_grid(SPDocument *doc, Inkscape::XML::Node *repr)
 862 {
 863     unsigned int v;
 864     sp_repr_get_boolean(repr, "showgrid", &v);
 865     v = !v;
 866
 867     bool saved = sp_document_get_undo_sensitive(doc);
 868     sp_document_set_undo_sensitive(doc, false);
 869
 870     sp_repr_set_boolean(repr, "showgrid", v);
 871
 872     doc->rroot->setAttribute("sodipodi:modified", "true");
 873     sp_document_set_undo_sensitive(doc, saved);
 874 }
 875
 876 static void sp_namedview_setup_grid(SPNamedView *nv)
 877 {
 878     for (GSList *l = nv->gridviews; l != NULL; l = l->next) {
 879         sp_namedview_setup_grid_item(nv, SP_CANVAS_ITEM(l->data));
 880     }
 881 }
 882
 883 static void sp_namedview_setup_grid_item(SPNamedView *nv, SPCanvasItem *item)
 884 {
 885     if ( nv->showgrid ) {
 886         sp_canvas_item_show(item);
 887     } else {
 888         sp_canvas_item_hide(item);
 889     }
 890
 891     sp_canvas_item_set((GtkObject *) item,
 892                        "color", nv->gridcolor,
 893                        "originx", nv->gridorigin[NR::X],
 894                        "originy", nv->gridorigin[NR::Y],
 895                        "spacingx", nv->gridspacing[NR::X],
 896                        "spacingy", nv->gridspacing[NR::Y],
 897                        "empcolor", nv->gridempcolor,
 898                        "empspacing", nv->gridempspacing,
 899                        NULL);
 900 }
 901
 902
 903 gchar const *SPNamedView::getName() const
 904 {
 905     SPException ex;
 906     SP_EXCEPTION_INIT(&ex);
 907     return sp_object_getAttribute(SP_OBJECT(this), "id", &ex);
 908 }
 909
 910 guint SPNamedView::getViewCount()
 911 {
 912     return ++viewcount;
 913 }
 914
 915 GSList const *SPNamedView::getViewList() const
 916 {
 917     return views;
 918 }
 919
 920 /* This should be moved somewhere */
 921
 922 static gboolean sp_str_to_bool(const gchar *str)
 923 {
 924     if (str) {
 925         if (!g_strcasecmp(str, "true") ||
 926             !g_strcasecmp(str, "yes") ||
 927             !g_strcasecmp(str, "y") ||
 928             (atoi(str) != 0)) {
 929             return TRUE;
 930         }
 931     }
 932
 933     return FALSE;
 934 }
 935
 936 /* fixme: Collect all these length parsing methods and think common sane API */
 937
 938 static gboolean sp_nv_read_length(const gchar *str, guint base, gdouble *val, const SPUnit **unit)
 939 {
 940     if (!str) {
 941         return FALSE;
 942     }
 943
 944     gchar *u;
 945     gdouble v = g_ascii_strtod(str, &u);
 946     if (!u) {
 947         return FALSE;
 948     }
 949     while (isspace(*u)) {
 950         u += 1;
 951     }
 952
 953     if (!*u) {
 954         /* No unit specified - keep default */
 955         *val = v;
 956         return TRUE;
 957     }
 958
 959     if (base & SP_UNIT_DEVICE) {
 960         if (u[0] && u[1] && !isalnum(u[2]) && !strncmp(u, "px", 2)) {
 961             *unit = &sp_unit_get_by_id(SP_UNIT_PX);
 962             *val = v;
 963             return TRUE;
 964         }
 965     }
 966
 967     if (base & SP_UNIT_ABSOLUTE) {
 968         if (!strncmp(u, "pt", 2)) {
 969             *unit = &sp_unit_get_by_id(SP_UNIT_PT);
 970         } else if (!strncmp(u, "mm", 2)) {
 971             *unit = &sp_unit_get_by_id(SP_UNIT_MM);
 972         } else if (!strncmp(u, "cm", 2)) {
 973             *unit = &sp_unit_get_by_id(SP_UNIT_CM);
 974         } else if (!strncmp(u, "m", 1)) {
 975             *unit = &sp_unit_get_by_id(SP_UNIT_M);
 976         } else if (!strncmp(u, "in", 2)) {
 977             *unit = &sp_unit_get_by_id(SP_UNIT_IN);
 978         } else {
 979             return FALSE;
 980         }
 981         *val = v;
 982         return TRUE;
 983     }
 984
 985     return FALSE;
 986 }
 987
 988 static gboolean sp_nv_read_opacity(const gchar *str, guint32 *color)
 989 {
 990     if (!str) {
 991         return FALSE;
 992     }
 993
 994     gchar *u;
 995     gdouble v = g_ascii_strtod(str, &u);
 996     if (!u) {
 997         return FALSE;
 998     }
 999     v = CLAMP(v, 0.0, 1.0);
1000
1001     *color = (*color & 0xffffff00) | (guint32) floor(v * 255.9999);
1002
1003     return TRUE;
1004 }
1005
1006 SPNamedView *sp_document_namedview(SPDocument *document, const gchar *id)
1007 {
1008     g_return_val_if_fail(document != NULL, NULL);
1009
1010     SPObject *nv = sp_item_group_get_child_by_name((SPGroup *) document->root, NULL, "sodipodi:namedview");
1011     g_assert(nv != NULL);
1012
1013     if (id == NULL) {
1014         return (SPNamedView *) nv;
1015     }
1016
1017     while (nv && strcmp(nv->id, id)) {
1018         nv = sp_item_group_get_child_by_name((SPGroup *) document->root, nv, "sodipodi:namedview");
1019     }
1020
1021     return (SPNamedView *) nv;
1022 }
1023
1024 /**
1025  * Returns namedview's default metric.
1026  */
1027 SPMetric SPNamedView::getDefaultMetric() const
1028 {
1029     if (doc_units) {
1030         return sp_unit_get_metric(doc_units);
1031     } else {
1032         return SP_PT;
1033     }
1034 }
1035
1036 /*
1037   Local Variables:
1038   mode:c++
1039   c-file-style:"stroustrup"
1040   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1041   indent-tabs-mode:nil
1042   fill-column:99
1043   End:
1044 */
1045 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtab