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             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 234             break;
 235         case SP_ATTR_GRIDTYPE:
 236             nv->gridtype = sp_str_to_bool(value);
 237             sp_namedview_setup_grid(nv);
 238             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 239             break;
 240         case SP_ATTR_SHOWGUIDES:
 241             if (!value) { // show guides if not specified, for backwards compatibility
 242                 nv->showguides = TRUE;
 243             } else {
 244                 nv->showguides = sp_str_to_bool(value);
 245             }
 246             sp_namedview_setup_guides(nv);
 247             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 248             break;
 249         case SP_ATTR_GRIDTOLERANCE:
 250             nv->gridtoleranceunit = &px;
 251             nv->gridtolerance = DEFAULTTOLERANCE;
 252             if (value) {
 253                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->gridtolerance, &nv->gridtoleranceunit);
 254             }
 255             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 256             break;
 257         case SP_ATTR_GUIDETOLERANCE:
 258             nv->guidetoleranceunit = &px;
 259             nv->guidetolerance = DEFAULTTOLERANCE;
 260             if (value) {
 261                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->guidetolerance, &nv->guidetoleranceunit);
 262             }
 263             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 264             break;
 265         case SP_ATTR_OBJECTTOLERANCE:
 266             nv->objecttoleranceunit = &px;
 267             nv->objecttolerance = DEFAULTTOLERANCE;
 268             if (value) {
 269                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->objecttolerance, &nv->objecttoleranceunit);
 270             }
 271             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 272             break;
 273         case SP_ATTR_ABS_TOLERANCE:
 274              if (!value)
 275                  nv->has_abs_tolerance = true;
 276              else
 277                  nv->has_abs_tolerance = (sp_str_to_bool (value) == TRUE);
 278              object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 279              break;
 280         case SP_ATTR_GRIDORIGINX:
 281         case SP_ATTR_GRIDORIGINY:
 282         {
 283             unsigned const d = (key == SP_ATTR_GRIDORIGINY);
 284             nv->gridunit = nv->doc_units;
 285             nv->gridorigin[d] = 0.0;
 286             if (value) {
 287                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->gridorigin[d], &nv->gridunit);
 288             }
 289             nv->gridorigin[d] = sp_units_get_pixels(nv->gridorigin[d], *(nv->gridunit));
 290             sp_namedview_setup_grid(nv);
 291             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 292             break;
 293         }
 294         case SP_ATTR_GRIDSPACINGX:
 295         case SP_ATTR_GRIDSPACINGY:
 296         {
 297             unsigned const d = (key == SP_ATTR_GRIDSPACINGY);
 298             nv->gridunit = nv->doc_units;
 299             nv->gridspacing[d] = 1.0;
 300             if (value) {
 301                 sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &nv->gridspacing[d], &nv->gridunit);
 302             }
 303             nv->gridspacing[d] = sp_units_get_pixels(nv->gridspacing[d], *(nv->gridunit));
 304             sp_namedview_setup_grid(nv);
 305             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 306             break;
 307         }
 308         case SP_ATTR_GRIDANGLEX:
 309         case SP_ATTR_GRIDANGLEZ:
 310         {
 311             unsigned const d = (key == SP_ATTR_GRIDANGLEZ); // 0=X  1=Z
 312             nv->gridangle[d] = 30; // 30 deg default
 313             if (value) {
 314                 nv->gridangle[d] = g_ascii_strtod(value, NULL);
 315             }
 316             sp_namedview_setup_grid(nv);
 317             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 318             break;
 319         }
 320         case SP_ATTR_GRIDCOLOR:
 321             nv->gridcolor = (nv->gridcolor & 0xff) | (DEFAULTGRIDCOLOR & 0xffffff00);
 322             if (value) {
 323                 nv->gridcolor = (nv->gridcolor & 0xff) | sp_svg_read_color(value, nv->gridcolor);
 324             }
 325             sp_namedview_setup_grid(nv);
 326             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 327             break;
 328         case SP_ATTR_GRIDEMPCOLOR:
 329             nv->gridempcolor = (nv->gridempcolor & 0xff) | (DEFAULTGRIDEMPCOLOR & 0xffffff00);
 330             if (value) {
 331                 nv->gridempcolor = (nv->gridempcolor & 0xff) | sp_svg_read_color(value, nv->gridempcolor);
 332             }
 333             sp_namedview_setup_grid(nv);
 334             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 335             break;
 336         case SP_ATTR_GRIDOPACITY:
 337             nv->gridcolor = (nv->gridcolor & 0xffffff00) | (DEFAULTGRIDCOLOR & 0xff);
 338             sp_nv_read_opacity(value, &nv->gridcolor);
 339             sp_namedview_setup_grid(nv);
 340             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 341             break;
 342         case SP_ATTR_GRIDEMPOPACITY:
 343             nv->gridempcolor = (nv->gridempcolor & 0xffffff00) | (DEFAULTGRIDEMPCOLOR & 0xff);
 344             sp_nv_read_opacity(value, &nv->gridempcolor);
 345             sp_namedview_setup_grid(nv);
 346             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 347             break;
 348         case SP_ATTR_GRIDEMPSPACING:
 349             nv->gridempspacing = DEFAULTGRIDEMPSPACING;
 350             if (value != NULL)
 351                 nv->gridempspacing = atoi(value);
 352             sp_namedview_setup_grid(nv);
 353             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 354             break;
 355         case SP_ATTR_GUIDECOLOR:
 356             nv->guidecolor = (nv->guidecolor & 0xff) | (DEFAULTGUIDECOLOR & 0xffffff00);
 357             if (value) {
 358                 nv->guidecolor = (nv->guidecolor & 0xff) | sp_svg_read_color(value, nv->guidecolor);
 359             }
 360             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 361                 g_object_set(G_OBJECT(l->data), "color", nv->guidecolor, NULL);
 362             }
 363             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 364             break;
 365         case SP_ATTR_GUIDEOPACITY:
 366             nv->guidecolor = (nv->guidecolor & 0xffffff00) | (DEFAULTGUIDECOLOR & 0xff);
 367             sp_nv_read_opacity(value, &nv->guidecolor);
 368             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 369                 g_object_set(G_OBJECT(l->data), "color", nv->guidecolor, NULL);
 370             }
 371             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 372             break;
 373         case SP_ATTR_GUIDEHICOLOR:
 374             nv->guidehicolor = (nv->guidehicolor & 0xff) | (DEFAULTGUIDEHICOLOR & 0xffffff00);
 375             if (value) {
 376                 nv->guidehicolor = (nv->guidehicolor & 0xff) | sp_svg_read_color(value, nv->guidehicolor);
 377             }
 378             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 379                 g_object_set(G_OBJECT(l->data), "hicolor", nv->guidehicolor, NULL);
 380             }
 381             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 382             break;
 383         case SP_ATTR_GUIDEHIOPACITY:
 384             nv->guidehicolor = (nv->guidehicolor & 0xffffff00) | (DEFAULTGUIDEHICOLOR & 0xff);
 385             sp_nv_read_opacity(value, &nv->guidehicolor);
 386             for (GSList *l = nv->guides; l != NULL; l = l->next) {
 387                 g_object_set(G_OBJECT(l->data), "hicolor", nv->guidehicolor, NULL);
 388             }
 389             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 390             break;
 391         case SP_ATTR_SHOWBORDER:
 392             nv->showborder = (value) ? sp_str_to_bool (value) : TRUE;
 393             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 394             break;
 395         case SP_ATTR_BORDERLAYER:
 396             nv->borderlayer = SP_BORDER_LAYER_BOTTOM;
 397             if (value && !strcasecmp(value, "true")) nv->borderlayer = SP_BORDER_LAYER_TOP;
 398             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 399             break;
 400         case SP_ATTR_BORDERCOLOR:
 401             nv->bordercolor = (nv->bordercolor & 0xff) | (DEFAULTBORDERCOLOR & 0xffffff00);
 402             if (value) {
 403                 nv->bordercolor = (nv->bordercolor & 0xff) | sp_svg_read_color (value, nv->bordercolor);
 404             }
 405             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 406             break;
 407         case SP_ATTR_BORDEROPACITY:
 408             nv->bordercolor = (nv->bordercolor & 0xffffff00) | (DEFAULTBORDERCOLOR & 0xff);
 409             sp_nv_read_opacity(value, &nv->bordercolor);
 410             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 411             break;
 412         case SP_ATTR_PAGECOLOR:
 413             nv->pagecolor = (nv->pagecolor & 0xff) | (DEFAULTPAGECOLOR & 0xffffff00);
 414             if (value) {
 415                 nv->pagecolor = (nv->pagecolor & 0xff) | sp_svg_read_color(value, nv->pagecolor);
 416             }
 417             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 418             break;
 419         case SP_ATTR_INKSCAPE_PAGEOPACITY:
 420             nv->pagecolor = (nv->pagecolor & 0xffffff00) | (DEFAULTPAGECOLOR & 0xff);
 421             sp_nv_read_opacity(value, &nv->pagecolor);
 422             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 423             break;
 424         case SP_ATTR_INKSCAPE_PAGESHADOW:
 425             nv->pageshadow = value? atoi(value) : 2; // 2 is the default
 426             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 427             break;
 428         case SP_ATTR_SHOWPAGESHADOW:
 429             nv->showpageshadow = (value) ? sp_str_to_bool(value) : TRUE;
 430             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 431             break;
 432         case SP_ATTR_INKSCAPE_ZOOM:
 433             nv->zoom = value ? g_ascii_strtod(value, NULL) : 0; // zero means not set
 434             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 435             break;
 436         case SP_ATTR_INKSCAPE_CX:
 437             nv->cx = value ? g_ascii_strtod(value, NULL) : HUGE_VAL; // HUGE_VAL means not set
 438             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 439             break;
 440         case SP_ATTR_INKSCAPE_CY:
 441             nv->cy = value ? g_ascii_strtod(value, NULL) : HUGE_VAL; // HUGE_VAL means not set
 442             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 443             break;
 444         case SP_ATTR_INKSCAPE_WINDOW_WIDTH:
 445             nv->window_width = value? atoi(value) : -1; // -1 means not set
 446             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 447             break;
 448         case SP_ATTR_INKSCAPE_WINDOW_HEIGHT:
 449             nv->window_height = value ? atoi(value) : -1; // -1 means not set
 450             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 451             break;
 452         case SP_ATTR_INKSCAPE_WINDOW_X:
 453             nv->window_x = value ? atoi(value) : -1; // -1 means not set
 454             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 455             break;
 456         case SP_ATTR_INKSCAPE_WINDOW_Y:
 457             nv->window_y = value ? atoi(value) : -1; // -1 means not set
 458             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 459             break;
 460         case SP_ATTR_INKSCAPE_GRID_BBOX:
 461             nv->snap_manager.grid.setSnapTo(Inkscape::Snapper::BBOX_POINT, value ? sp_str_to_bool(value) : TRUE);
 462             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 463             break;
 464         case SP_ATTR_INKSCAPE_GRID_POINTS:
 465             nv->snap_manager.grid.setSnapTo(Inkscape::Snapper::SNAP_POINT, value ? sp_str_to_bool(value) : FALSE);
 466             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 467             break;
 468         case SP_ATTR_INKSCAPE_GUIDE_BBOX:
 469             nv->snap_manager.guide.setSnapTo(Inkscape::Snapper::BBOX_POINT, value ? sp_str_to_bool(value) : TRUE);
 470             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 471             break;
 472         case SP_ATTR_INKSCAPE_GUIDE_POINTS:
 473             nv->snap_manager.guide.setSnapTo(Inkscape::Snapper::SNAP_POINT, value ? sp_str_to_bool(value) : FALSE);
 474             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 475             break;
 476         case SP_ATTR_INKSCAPE_OBJECT_BBOX:
 477             nv->snap_manager.object.setSnapTo(Inkscape::Snapper::BBOX_POINT, (value) ? sp_str_to_bool(value) : FALSE);
 478             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 479             break;
 480         case SP_ATTR_INKSCAPE_OBJECT_POINTS:
 481             nv->snap_manager.object.setSnapTo(Inkscape::Snapper::SNAP_POINT, (value) ? sp_str_to_bool(value) : FALSE);
 482             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 483             break;
 484         case SP_ATTR_INKSCAPE_OBJECT_PATHS:
 485             nv->snap_manager.object.setSnapToPaths(value ? sp_str_to_bool(value) : TRUE);
 486             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 487             break;
 488         case SP_ATTR_INKSCAPE_OBJECT_NODES:
 489             nv->snap_manager.object.setSnapToNodes(value ? sp_str_to_bool(value) : TRUE);
 490             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 491             break;
 492         case SP_ATTR_INKSCAPE_CURRENT_LAYER:
 493             nv->default_layer_id = value ? g_quark_from_string(value) : 0;
 494             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 495             break;
 496         case SP_ATTR_INKSCAPE_CONNECTOR_SPACING:
 497             nv->connector_spacing = value ? g_ascii_strtod(value, NULL) :
 498                     defaultConnSpacing;
 499             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 500             break;
 501         case SP_ATTR_INKSCAPE_DOCUMENT_UNITS: {
 502             /* The default unit if the document doesn't override this: e.g. for files saved as
 503              * `plain SVG', or non-inkscape files, or files created by an inkscape 0.40 &
 504              * earlier.
 505              *
 506              * Here we choose `px': useful for screen-destined SVGs, and fewer bug reports
 507              * about "not the same numbers as what's in the SVG file" (at least for documents
 508              * without a viewBox attribute on the root <svg> element).  Similarly, it's also
 509              * the most reliable unit (i.e. least likely to be wrong in different viewing
 510              * conditions) for viewBox-less SVG files given that it's the unit that inkscape
 511              * uses for all coordinates.
 512              *
 513              * For documents that do have a viewBox attribute on the root <svg> element, it
 514              * might be better if we used either viewBox coordinates or if we used the unit of
 515              * say the width attribute of the root <svg> element.  However, these pose problems
 516              * in that they aren't in general absolute units as currently required by
 517              * doc_units.
 518              */
 519             SPUnit const *new_unit = &sp_unit_get_by_id(SP_UNIT_PX);
 520
 521             if (value) {
 522                 SPUnit const *const req_unit = sp_unit_get_by_abbreviation(value);
 523                 if ( req_unit == NULL ) {
 524                     g_warning("Unrecognized unit `%s'", value);
 525                     /* fixme: Document errors should be reported in the status bar or
 526                      * the like (e.g. as per
 527                      * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing); g_log
 528                      * should be only for programmer errors. */
 529                 } else if ( req_unit->base == SP_UNIT_ABSOLUTE ||
 530                             req_unit->base == SP_UNIT_DEVICE     ) {
 531                     new_unit = req_unit;
 532                 } else {
 533                     g_warning("Document units must be absolute like `mm', `pt' or `px', but found `%s'",
 534                               value);
 535                     /* fixme: Don't use g_log (see above). */
 536                 }
 537             }
 538             nv->doc_units = new_unit;
 539             object->requestModified(SP_OBJECT_MODIFIED_FLAG);
 540             break;
 541         }
 542         default:
 543             if (((SPObjectClass *) (parent_class))->set) {
 544                 ((SPObjectClass *) (parent_class))->set(object, key, value);
 545             }
 546             break;
 547     }
 548 }
 549
 550 static void sp_namedview_child_added(SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref)
 551 {
 552     SPNamedView *nv = (SPNamedView *) object;
 553
 554     if (((SPObjectClass *) (parent_class))->child_added) {
 555         (* ((SPObjectClass *) (parent_class))->child_added)(object, child, ref);
 556     }
 557
 558     const gchar *id = child->attribute("id");
 559     SPObject *no = object->document->getObjectById(id);
 560     g_assert(SP_IS_OBJECT(no));
 561
 562     if (SP_IS_GUIDE(no)) {
 563         SPGuide *g = (SPGuide *) no;
 564         nv->guides = g_slist_prepend(nv->guides, g);
 565         g_object_set(G_OBJECT(g), "color", nv->guidecolor, "hicolor", nv->guidehicolor, NULL);
 566         if (nv->editable) {
 567             for (GSList *l = nv->views; l != NULL; l = l->next) {
 568                 sp_guide_show(g, static_cast<SPDesktop*>(l->data)->guides, (GCallback) sp_dt_guide_event);
 569                 if (static_cast<SPDesktop*>(l->data)->guides_active)
 570                     sp_guide_sensitize(g,
 571                                        sp_desktop_canvas(static_cast<SPDesktop*> (l->data)),
 572                                        TRUE);
 573                 if (nv->showguides) {
 574                     for (GSList *v = SP_GUIDE(g)->views; v != NULL; v = v->next) {
 575                         sp_canvas_item_show(SP_CANVAS_ITEM(v->data));
 576                     }
 577                 } else {
 578                     for (GSList *v = SP_GUIDE(g)->views; v != NULL; v = v->next) {
 579                         sp_canvas_item_hide(SP_CANVAS_ITEM(v->data));
 580                     }
 581                 }
 582             }
 583         }
 584     }
 585 }
 586
 587 static void sp_namedview_remove_child(SPObject *object, Inkscape::XML::Node *child)
 588 {
 589     SPNamedView *nv = (SPNamedView *) object;
 590
 591     GSList **ref = &nv->guides;
 592     for ( GSList *iter = nv->guides ; iter ; iter = iter->next ) {
 593         if ( SP_OBJECT_REPR((SPObject *)iter->data) == child ) {
 594             *ref = iter->next;
 595             iter->next = NULL;
 596             g_slist_free_1(iter);
 597             break;
 598         }
 599         ref = &iter->next;
 600     }
 601
 602     if (((SPObjectClass *) (parent_class))->remove_child) {
 603         (* ((SPObjectClass *) (parent_class))->remove_child)(object, child);
 604     }
 605 }
 606
 607 static Inkscape::XML::Node *sp_namedview_write(SPObject *object, Inkscape::XML::Node *repr, guint flags)
 608 {
 609     if ( ( flags & SP_OBJECT_WRITE_EXT ) &&
 610          repr != SP_OBJECT_REPR(object) )
 611     {
 612         if (repr) {
 613             repr->mergeFrom(SP_OBJECT_REPR(object), "id");
 614         } else {
 615             repr = SP_OBJECT_REPR(object)->duplicate();
 616         }
 617     }
 618
 619     return repr;
 620 }
 621
 622 void SPNamedView::show(SPDesktop *desktop)
 623 {
 624     for (GSList *l = guides; l != NULL; l = l->next) {
 625         sp_guide_show(SP_GUIDE(l->data), desktop->guides, (GCallback) sp_dt_guide_event);
 626         if (desktop->guides_active) {
 627             sp_guide_sensitize(SP_GUIDE(l->data), sp_desktop_canvas(desktop), TRUE);
 628         }
 629         if (showguides) {
 630             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 631                 sp_canvas_item_show(SP_CANVAS_ITEM(v->data));
 632             }
 633         } else {
 634             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 635                 sp_canvas_item_hide(SP_CANVAS_ITEM(v->data));
 636             }
 637         }
 638     }
 639
 640     views = g_slist_prepend(views, desktop);
 641
 642     SPCanvasItem * item = sp_canvas_item_new(sp_desktop_grid(desktop), SP_TYPE_CGRID, NULL);
 643     // since we're keeping a copy, we need to bump up the ref count
 644     gtk_object_ref(GTK_OBJECT(item));
 645     gridviews = g_slist_prepend(gridviews, item);
 646
 647     item = sp_canvas_item_new(sp_desktop_grid(desktop), SP_TYPE_CAXONOMGRID, NULL);
 648     // since we're keeping a copy, we need to bump up the ref count
 649     gtk_object_ref(GTK_OBJECT(item));
 650     gridviews = g_slist_prepend(gridviews, item);
 651
 652     sp_namedview_setup_grid(this);
 653 }
 654
 655 /*
 656  * Restores window geometry from the document settings
 657  */
 658 void sp_namedview_window_from_document(SPDesktop *desktop)
 659 {
 660     SPNamedView *nv = desktop->namedview;
 661     gint save_geometry = prefs_get_int_attribute("options.savewindowgeometry", "value", 0);
 662
 663     // restore window size and position
 664     if (save_geometry) {
 665         if (nv->window_width != -1 && nv->window_height != -1)
 666             desktop->setWindowSize(nv->window_width, nv->window_height);
 667         if (nv->window_x != -1 && nv->window_y != -1)
 668             desktop->setWindowPosition(NR::Point(nv->window_x, nv->window_y));
 669     }
 670
 671     // restore zoom and view
 672     if (nv->zoom != 0 && nv->zoom != HUGE_VAL && !isNaN(nv->zoom)
 673         && nv->cx != HUGE_VAL && !isNaN(nv->cx)
 674         && nv->cy != HUGE_VAL && !isNaN(nv->cy)) {
 675         desktop->zoom_absolute(nv->cx, nv->cy, nv->zoom);
 676     } else if (sp_desktop_document(desktop)) { // document without saved zoom, zoom to its page
 677         desktop->zoom_page();
 678     }
 679
 680     // cancel any history of zooms up to this point
 681     if (desktop->zooms_past) {
 682         g_list_free(desktop->zooms_past);
 683         desktop->zooms_past = NULL;
 684     }
 685
 686     SPObject *layer = NULL;
 687     SPDocument *document = desktop->doc();
 688     if ( nv->default_layer_id != 0 ) {
 689         layer = document->getObjectById(g_quark_to_string(nv->default_layer_id));
 690     }
 691     // don't use that object if it's not at least group
 692     if ( !layer || !SP_IS_GROUP(layer) ) {
 693         layer = NULL;
 694     }
 695     // if that didn't work out, look for the topmost layer
 696     if (!layer) {
 697         SPObject *iter = sp_object_first_child(SP_DOCUMENT_ROOT(document));
 698         for ( ; iter ; iter = SP_OBJECT_NEXT(iter) ) {
 699             if (desktop->isLayer(iter)) {
 700                 layer = iter;
 701             }
 702         }
 703     }
 704     if (layer) {
 705         desktop->setCurrentLayer(layer);
 706     }
 707
 708     // FIXME: find a better place to do this
 709     desktop->event_log->updateUndoVerbs();
 710 }
 711
 712 void sp_namedview_document_from_window(SPDesktop *desktop)
 713 {
 714     gint save_geometry = prefs_get_int_attribute("options.savewindowgeometry", "value", 0);
 715     Inkscape::XML::Node *view = SP_OBJECT_REPR(desktop->namedview);
 716     NR::Rect const r = desktop->get_display_area();
 717
 718     // saving window geometry is not undoable
 719     bool saved = sp_document_get_undo_sensitive(sp_desktop_document(desktop));
 720     sp_document_set_undo_sensitive(sp_desktop_document(desktop), false);
 721
 722     sp_repr_set_svg_double(view, "inkscape:zoom", desktop->current_zoom());
 723     sp_repr_set_svg_double(view, "inkscape:cx", r.midpoint()[NR::X]);
 724     sp_repr_set_svg_double(view, "inkscape:cy", r.midpoint()[NR::Y]);
 725
 726     if (save_geometry) {
 727         gint w, h, x, y;
 728         desktop->getWindowGeometry(x, y, w, h);
 729         sp_repr_set_int(view, "inkscape:window-width", w);
 730         sp_repr_set_int(view, "inkscape:window-height", h);
 731         sp_repr_set_int(view, "inkscape:window-x", x);
 732         sp_repr_set_int(view, "inkscape:window-y", y);
 733     }
 734
 735     view->setAttribute("inkscape:current-layer", SP_OBJECT_ID(desktop->currentLayer()));
 736
 737     // restore undoability
 738     sp_document_set_undo_sensitive(sp_desktop_document(desktop), saved);
 739 }
 740
 741 void SPNamedView::hide(SPDesktop const *desktop)
 742 {
 743     g_assert(desktop != NULL);
 744     g_assert(g_slist_find(views, desktop));
 745
 746     for (GSList *l = guides; l != NULL; l = l->next) {
 747         sp_guide_hide(SP_GUIDE(l->data), sp_desktop_canvas(desktop));
 748     }
 749
 750     views = g_slist_remove(views, desktop);
 751
 752     GSList *l;
 753     for (l = gridviews; l != NULL; l = l->next) {
 754         if (SP_CANVAS_ITEM(l->data)->canvas == sp_desktop_canvas(desktop)) {
 755             sp_canvas_item_hide(SP_CANVAS_ITEM(l->data));
 756             gtk_object_unref(GTK_OBJECT(l->data));
 757             gridviews = g_slist_remove(gridviews, l->data);
 758         }
 759     }
 760 }
 761
 762 void SPNamedView::activateGuides(gpointer desktop, gboolean active)
 763 {
 764     g_assert(desktop != NULL);
 765     g_assert(g_slist_find(views, desktop));
 766
 767     SPDesktop *dt = static_cast<SPDesktop*>(desktop);
 768
 769     for (GSList *l = guides; l != NULL; l = l->next) {
 770         sp_guide_sensitize(SP_GUIDE(l->data), sp_desktop_canvas(dt), active);
 771     }
 772 }
 773
 774 static void sp_namedview_setup_guides(SPNamedView *nv)
 775 {
 776     for (GSList *l = nv->guides; l != NULL; l = l->next) {
 777         if (nv->showguides) {
 778             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 779                 sp_canvas_item_show(SP_CANVAS_ITEM(v->data));
 780             }
 781         } else {
 782             for (GSList *v = SP_GUIDE(l->data)->views; v != NULL; v = v->next) {
 783                 sp_canvas_item_hide(SP_CANVAS_ITEM(v->data));
 784             }
 785         }
 786     }
 787 }
 788
 789 void sp_namedview_toggle_guides(SPDocument *doc, Inkscape::XML::Node *repr)
 790 {
 791     unsigned int v;
 792     unsigned int set = sp_repr_get_boolean(repr, "showguides", &v);
 793     if (!set) { // hide guides if not specified, for backwards compatibility
 794         v = FALSE;
 795     } else {
 796         v = !v;
 797     }
 798
 799     bool saved = sp_document_get_undo_sensitive(doc);
 800     sp_document_set_undo_sensitive(doc, false);
 801
 802     sp_repr_set_boolean(repr, "showguides", v);
 803
 804     doc->rroot->setAttribute("sodipodi:modified", "true");
 805     sp_document_set_undo_sensitive(doc, saved);
 806 }
 807
 808 void sp_namedview_toggle_grid(SPDocument *doc, Inkscape::XML::Node *repr)
 809 {
 810     unsigned int v;
 811     sp_repr_get_boolean(repr, "showgrid", &v);
 812     v = !v;
 813
 814     bool saved = sp_document_get_undo_sensitive(doc);
 815     sp_document_set_undo_sensitive(doc, false);
 816
 817     sp_repr_set_boolean(repr, "showgrid", v);
 818
 819     doc->rroot->setAttribute("sodipodi:modified", "true");
 820     sp_document_set_undo_sensitive(doc, saved);
 821 }
 822
 823 void sp_namedview_set_gridtype(bool type, SPDocument *doc, Inkscape::XML::Node *repr)
 824 {
 825     bool saved = sp_document_get_undo_sensitive(doc);
 826     sp_document_set_undo_sensitive(doc, false);
 827
 828     sp_repr_set_boolean(repr, "showgrid", type);
 829
 830     doc->rroot->setAttribute("sodipodi:modified", "true");
 831     sp_document_set_undo_sensitive(doc, saved);
 832 }
 833
 834 static void sp_namedview_setup_grid(SPNamedView *nv)
 835 {
 836     for (GSList *l = nv->gridviews; l != NULL; l = l->next) {
 837         sp_namedview_setup_grid_item(nv, SP_CANVAS_ITEM(l->data));
 838     }
 839 }
 840
 841 static void sp_namedview_setup_grid_item(SPNamedView *nv, SPCanvasItem *item)
 842 {
 843     bool btype = SP_IS_CAXONOMGRID(GTK_OBJECT(item));
 844
 845     if ( nv->showgrid && (nv->gridtype == btype) ) {
 846         sp_canvas_item_show(item);
 847     } else {
 848         sp_canvas_item_hide(item);
 849     }
 850
 851     if (!btype){
 852         // CGRID
 853         sp_canvas_item_set((GtkObject *) item,
 854                            "color", nv->gridcolor,
 855                            "originx", nv->gridorigin[NR::X],
 856                            "originy", nv->gridorigin[NR::Y],
 857                            "spacingx", nv->gridspacing[NR::X],
 858                            "spacingy", nv->gridspacing[NR::Y],
 859                            "empcolor", nv->gridempcolor,
 860                            "empspacing", nv->gridempspacing,
 861                            NULL);
 862     } else {
 863         // CAXONOMGRID
 864         sp_canvas_item_set((GtkObject *) item,
 865                            "color", nv->gridcolor,
 866                            "originx", nv->gridorigin[NR::X],
 867                            "originy", nv->gridorigin[NR::Y],
 868                            "spacingy", nv->gridspacing[NR::Y],
 869                            "anglex", nv->gridangle[0],
 870                            "anglez", nv->gridangle[1],
 871                            "empcolor", nv->gridempcolor,
 872                            "empspacing", nv->gridempspacing,
 873                            NULL);
 874     }
 875 }
 876
 877
 878 gchar const *SPNamedView::getName() const
 879 {
 880     SPException ex;
 881     SP_EXCEPTION_INIT(&ex);
 882     return sp_object_getAttribute(SP_OBJECT(this), "id", &ex);
 883 }
 884
 885 guint SPNamedView::getViewCount()
 886 {
 887     return ++viewcount;
 888 }
 889
 890 GSList const *SPNamedView::getViewList() const
 891 {
 892     return views;
 893 }
 894
 895 /* This should be moved somewhere */
 896
 897 static gboolean sp_str_to_bool(const gchar *str)
 898 {
 899     if (str) {
 900         if (!g_strcasecmp(str, "true") ||
 901             !g_strcasecmp(str, "yes") ||
 902             !g_strcasecmp(str, "y") ||
 903             (atoi(str) != 0)) {
 904             return TRUE;
 905         }
 906     }
 907
 908     return FALSE;
 909 }
 910
 911 /* fixme: Collect all these length parsing methods and think common sane API */
 912
 913 static gboolean sp_nv_read_length(const gchar *str, guint base, gdouble *val, const SPUnit **unit)
 914 {
 915     if (!str) {
 916         return FALSE;
 917     }
 918
 919     gchar *u;
 920     gdouble v = g_ascii_strtod(str, &u);
 921     if (!u) {
 922         return FALSE;
 923     }
 924     while (isspace(*u)) {
 925         u += 1;
 926     }
 927
 928     if (!*u) {
 929         /* No unit specified - keep default */
 930         *val = v;
 931         return TRUE;
 932     }
 933
 934     if (base & SP_UNIT_DEVICE) {
 935         if (u[0] && u[1] && !isalnum(u[2]) && !strncmp(u, "px", 2)) {
 936             *unit = &sp_unit_get_by_id(SP_UNIT_PX);
 937             *val = v;
 938             return TRUE;
 939         }
 940     }
 941
 942     if (base & SP_UNIT_ABSOLUTE) {
 943         if (!strncmp(u, "pt", 2)) {
 944             *unit = &sp_unit_get_by_id(SP_UNIT_PT);
 945         } else if (!strncmp(u, "mm", 2)) {
 946             *unit = &sp_unit_get_by_id(SP_UNIT_MM);
 947         } else if (!strncmp(u, "cm", 2)) {
 948             *unit = &sp_unit_get_by_id(SP_UNIT_CM);
 949         } else if (!strncmp(u, "m", 1)) {
 950             *unit = &sp_unit_get_by_id(SP_UNIT_M);
 951         } else if (!strncmp(u, "in", 2)) {
 952             *unit = &sp_unit_get_by_id(SP_UNIT_IN);
 953         } else {
 954             return FALSE;
 955         }
 956         *val = v;
 957         return TRUE;
 958     }
 959
 960     return FALSE;
 961 }
 962
 963 static gboolean sp_nv_read_opacity(const gchar *str, guint32 *color)
 964 {
 965     if (!str) {
 966         return FALSE;
 967     }
 968
 969     gchar *u;
 970     gdouble v = strtod(str, &u);
 971     if (!u) {
 972         return FALSE;
 973     }
 974     v = CLAMP(v, 0.0, 1.0);
 975
 976     *color = (*color & 0xffffff00) | (guint32) floor(v * 255.9999);
 977
 978     return TRUE;
 979 }
 980
 981 SPNamedView *sp_document_namedview(SPDocument *document, const gchar *id)
 982 {
 983     g_return_val_if_fail(document != NULL, NULL);
 984
 985     SPObject *nv = sp_item_group_get_child_by_name((SPGroup *) document->root, NULL, "sodipodi:namedview");
 986     g_assert(nv != NULL);
 987
 988     if (id == NULL) {
 989         return (SPNamedView *) nv;
 990     }
 991
 992     while (nv && strcmp(nv->id, id)) {
 993         nv = sp_item_group_get_child_by_name((SPGroup *) document->root, nv, "sodipodi:namedview");
 994     }
 995
 996     return (SPNamedView *) nv;
 997 }
 998
 999 /**
1000  * Returns namedview's default metric.
1001  */
1002 SPMetric SPNamedView::getDefaultMetric() const
1003 {
1004     if (doc_units) {
1005         return sp_unit_get_metric(doc_units);
1006     } else {
1007         return SP_PT;
1008     }
1009 }
1010
1011 /*
1012   Local Variables:
1013   mode:c++
1014   c-file-style:"stroustrup"
1015   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1016   indent-tabs-mode:nil
1017   fill-column:99
1018   End:
1019 */
1020 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :