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