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