src/layer-manager.cpp

   1 /*
   2  * Inkscape::LayerManager - a view of a document's layers, relative
   3  *                          to a particular desktop
   4  *
   5  * Copyright 2006  MenTaLguY  <mental@rydia.net>
   6  *
   7  * Released under GNU GPL, read the file 'COPYING' for more information
   8  */
   9
  10 #include <set>
  11 #include <sigc++/functors/mem_fun.h>
  12 #include <sigc++/adaptors/hide.h>
  13 #include "gc-managed.h"
  14 #include "gc-finalized.h"
  15 #include "document.h"
  16 #include "desktop.h"
  17 #include "desktop-handles.h"
  18 #include "layer-manager.h"
  19 #include "prefs-utils.h"
  20 #include "ui/view/view.h"
  21 #include "selection.h"
  22 #include "sp-object.h"
  23 #include "sp-item-group.h"
  24 #include "xml/node.h"
  25 #include "xml/node-observer.h"
  26 #include "util/format.h"
  27 // #include "debug/event-tracker.h"
  28 // #include "debug/simple-event.h"
  29
  30 namespace Inkscape {
  31
  32
  33 using Inkscape::XML::Node;
  34
  35 class LayerManager::LayerWatcher : public Inkscape::XML::NodeObserver {
  36 public:
  37     LayerWatcher(LayerManager* mgr, SPObject* obj, sigc::connection c) :
  38         _mgr(mgr),
  39         _obj(obj),
  40         _connection(c),
  41         _lockedAttr(g_quark_from_string("sodipodi:insensitive")),
  42         _labelAttr(g_quark_from_string("inkscape:label"))
  43     {}
  44
  45     virtual void notifyChildAdded( Node &/*node*/, Node &/*child*/, Node */*prev*/ ) {}
  46     virtual void notifyChildRemoved( Node &/*node*/, Node &/*child*/, Node */*prev*/ ) {}
  47     virtual void notifyChildOrderChanged( Node &/*node*/, Node &/*child*/, Node */*old_prev*/, Node */*new_prev*/ ) {}
  48     virtual void notifyContentChanged( Node &/*node*/, Util::ptr_shared<char> /*old_content*/, Util::ptr_shared<char> /*new_content*/ ) {}
  49     virtual void notifyAttributeChanged( Node &/*node*/, GQuark name, Util::ptr_shared<char> /*old_value*/, Util::ptr_shared<char> /*new_value*/ ) {
  50         if ( name == _lockedAttr || name == _labelAttr ) {
  51             if ( _mgr && _obj ) {
  52                 _mgr->_objectModified( _obj, 0 );
  53             }
  54         }
  55     }
  56
  57     LayerManager* _mgr;
  58     SPObject* _obj;
  59     sigc::connection _connection;
  60     GQuark _lockedAttr;
  61     GQuark _labelAttr;
  62 };
  63
  64 /*
  65 namespace {
  66
  67 Util::ptr_shared<char> stringify_node(Node const &node);
  68
  69 Util::ptr_shared<char> stringify_obj(SPObject const &obj) {
  70     gchar *string;
  71
  72     if (obj.id) {
  73         string = g_strdup_printf("SPObject(%p)=%s  repr(%p)", &obj, obj.id, obj.repr);
  74     } else {
  75         string = g_strdup_printf("SPObject(%p) repr(%p)", &obj, obj.repr);
  76     }
  77
  78     Util::ptr_shared<char> result=Util::share_string(string);
  79     g_free(string);
  80     return result;
  81
  82 }
  83
  84 typedef Debug::SimpleEvent<Debug::Event::OTHER> DebugLayer;
  85
  86 class DebugLayerNote : public DebugLayer {
  87 public:
  88     DebugLayerNote(Util::ptr_shared<char> descr)
  89         : DebugLayer(Util::share_static_string("layer-note"))
  90     {
  91         _addProperty("descr", descr);
  92     }
  93 };
  94
  95 class DebugLayerRebuild : public DebugLayer {
  96 public:
  97     DebugLayerRebuild()
  98         : DebugLayer(Util::share_static_string("rebuild-layers"))
  99     {
 100     }
 101 };
 102
 103 class DebugLayerObj : public DebugLayer {
 104 public:
 105     DebugLayerObj(SPObject const& obj, Util::ptr_shared<char> name)
 106         : DebugLayer(name)
 107     {
 108         _addProperty("layer", stringify_obj(obj));
 109     }
 110 };
 111
 112 class DebugAddLayer : public DebugLayerObj {
 113 public:
 114     DebugAddLayer(SPObject const &obj)
 115         : DebugLayerObj(obj, Util::share_static_string("add-layer"))
 116     {
 117     }
 118 };
 119
 120
 121 } // end of namespace
 122 */
 123
 124 LayerManager::LayerManager(SPDesktop *desktop)
 125 : _desktop(desktop), _document(NULL)
 126 {
 127     _layer_connection = desktop->connectCurrentLayerChanged( sigc::mem_fun(*this, &LayerManager::_selectedLayerChanged) );
 128
 129     sigc::bound_mem_functor1<void, Inkscape::LayerManager, SPDocument*> first = sigc::mem_fun(*this, &LayerManager::_setDocument);
 130
 131     // This next line has problems on gcc 4.0.2
 132     sigc::slot<void, SPDocument*> base2 = first;
 133
 134     sigc::slot<void,SPDesktop*,SPDocument*> slot2 = sigc::hide<0>( base2 );
 135     _document_connection = desktop->connectDocumentReplaced( slot2 );
 136
 137     _setDocument(desktop->doc());
 138 }
 139
 140 LayerManager::~LayerManager()
 141 {
 142     _layer_connection.disconnect();
 143     _document_connection.disconnect();
 144     _resource_connection.disconnect();
 145 }
 146
 147 void LayerManager::setCurrentLayer( SPObject* obj )
 148 {
 149     //g_return_if_fail( _desktop->currentRoot() );
 150     if ( _desktop->currentRoot() ) {
 151         _desktop->setCurrentLayer( obj );
 152
 153         if ( prefs_get_int_attribute_limited("options.selection", "layerdeselect", 1, 0, 1) ) {
 154             sp_desktop_selection( _desktop )->clear();
 155         }
 156     }
 157 }
 158
 159 void LayerManager::renameLayer( SPObject* obj, gchar const *label )
 160 {
 161     Glib::ustring incoming( label ? label : "" );
 162     Glib::ustring result(incoming);
 163     Glib::ustring base(incoming);
 164     guint startNum = 1;
 165
 166     Glib::ustring::size_type pos = base.rfind('#');
 167     if ( pos != Glib::ustring::npos ) {
 168         gchar* numpart = g_strdup(base.substr(pos+1).c_str());
 169         if ( numpart ) {
 170             gchar* endPtr = 0;
 171             guint64 val = g_ascii_strtoull( numpart, &endPtr, 10);
 172             if ( ((val > 0) || (endPtr != numpart)) && (val < 65536) ) {
 173                 base.erase( pos );
 174                 result = base;
 175                 startNum = static_cast<int>(val);
 176             }
 177             g_free(numpart);
 178         }
 179     }
 180
 181     std::set<Glib::ustring> currentNames;
 182     GSList const *layers=sp_document_get_resource_list(_document, "layer");
 183     SPObject *root=_desktop->currentRoot();
 184     if ( root ) {
 185         for ( GSList const *iter=layers ; iter ; iter = iter->next ) {
 186             SPObject *layer=static_cast<SPObject *>(iter->data);
 187             if ( layer != obj ) {
 188                 currentNames.insert( layer->label() ? Glib::ustring(layer->label()) : Glib::ustring() );
 189             }
 190         }
 191     }
 192
 193     // Not sure if we need to cap it, but we'll just be paranoid for the moment
 194     // Intentionally unsigned
 195     guint endNum = startNum + 3000;
 196     for ( guint i = startNum; (i < endNum) && (currentNames.find(result) != currentNames.end()); i++ ) {
 197         gchar* suffix = g_strdup_printf("#%d", i);
 198         result = base;
 199         result += suffix;
 200
 201         g_free(suffix);
 202     }
 203
 204     obj->setLabel( result.c_str() );
 205 }
 206
 207
 208
 209 void LayerManager::_setDocument(SPDocument *document) {
 210     if (_document) {
 211         _resource_connection.disconnect();
 212     }
 213     _document = document;
 214     if (document) {
 215         _resource_connection = sp_document_resources_changed_connect(document, "layer", sigc::mem_fun(*this, &LayerManager::_rebuild));
 216     }
 217     _rebuild();
 218 }
 219
 220 void LayerManager::_objectModified( SPObject* obj, guint /*flags*/ )
 221 {
 222     _details_changed_signal.emit( obj );
 223 }
 224
 225 void LayerManager::_rebuild() {
 226 //     Debug::EventTracker<DebugLayerRebuild> tracker1();
 227
 228     while ( !_watchers.empty() ) {
 229         LayerWatcher* one = _watchers.back();
 230         _watchers.pop_back();
 231         if ( one->_obj ) {
 232             Node* node = SP_OBJECT_REPR(one->_obj);
 233             if ( node ) {
 234                 node->removeObserver(*one);
 235             }
 236             one->_connection.disconnect();
 237         }
 238     }
 239
 240     _clear();
 241
 242     if (!_document) // http://sourceforge.net/mailarchive/forum.php?thread_name=5747bce9a7ed077c1b4fc9f0f4f8a5e0%40localhost&forum_name=inkscape-devel
 243         return;
 244
 245     GSList const *layers = sp_document_get_resource_list(_document, "layer");
 246     SPObject *root=_desktop->currentRoot();
 247     if ( root ) {
 248         _addOne(root);
 249
 250         std::set<SPGroup*> layersToAdd;
 251
 252         for ( GSList const *iter = layers; iter; iter = iter->next ) {
 253             SPObject *layer = static_cast<SPObject *>(iter->data);
 254 //             Debug::EventTracker<DebugLayerNote> tracker(Util::format("Examining %s", layer->label()));
 255             bool needsAdd = false;
 256             std::set<SPGroup*> additional;
 257
 258             if ( root->isAncestorOf(layer) ) {
 259                 needsAdd = true;
 260                 for ( SPObject* curr = layer; curr && (curr != root) && needsAdd; curr = SP_OBJECT_PARENT(curr) ) {
 261                     if ( SP_IS_GROUP(curr) ) {
 262                         SPGroup* group = SP_GROUP(curr);
 263                         if ( group->layerMode() == SPGroup::LAYER ) {
 264                             // If we have a layer-group as the one or a parent, ensure it is listed as a valid layer.
 265                             needsAdd &= ( g_slist_find(const_cast<GSList *>(layers), curr) != NULL );
 266                             if ( (!(group->repr)) || (!(group->repr->parent())) ) {
 267                                 needsAdd = false;
 268                             }
 269                         } else {
 270                             // If a non-layer group is a parent of layer groups, then show it also as a layer.
 271                             // TODO add the magic Inkscape group mode?
 272                             if ( group->repr && group->repr->parent() ) {
 273                                 additional.insert(group);
 274                             } else {
 275                                 needsAdd = false;
 276                             }
 277                         }
 278                     }
 279                 }
 280             }
 281             if ( needsAdd ) {
 282                 if ( !includes(layer) ) {
 283                     layersToAdd.insert(SP_GROUP(layer));
 284                 }
 285                 for ( std::set<SPGroup*>::iterator it = additional.begin(); it != additional.end(); ++it ) {
 286                     if ( !includes(*it) ) {
 287                         layersToAdd.insert(*it);
 288                     }
 289                 }
 290             }
 291         }
 292
 293         for ( std::set<SPGroup*>::iterator it = layersToAdd.begin(); it != layersToAdd.end(); ++it ) {
 294             SPGroup* layer = *it;
 295             // Filter out objects in the middle of being deleted
 296
 297             // Such may have been the cause of bug 1339397.
 298             // See http://sourceforge.net/tracker/index.php?func=detail&aid=1339397&group_id=93438&atid=604306
 299
 300             SPObject const *higher = layer;
 301             while ( higher && (SP_OBJECT_PARENT(higher) != root) ) {
 302                 higher = SP_OBJECT_PARENT(higher);
 303             }
 304             Node* node = higher ? SP_OBJECT_REPR(higher) : 0;
 305             if ( node && node->parent() ) {
 306 //                 Debug::EventTracker<DebugAddLayer> tracker(*layer);
 307
 308                 sigc::connection connection = layer->connectModified(sigc::mem_fun(*this, &LayerManager::_objectModified));
 309
 310                 LayerWatcher *eye = new LayerWatcher(this, layer, connection);
 311                 _watchers.push_back( eye );
 312                 SP_OBJECT_REPR(layer)->addObserver(*eye);
 313
 314                 _addOne(layer);
 315             }
 316         }
 317     }
 318 }
 319
 320 // Connected to the desktop's CurrentLayerChanged signal
 321 void LayerManager::_selectedLayerChanged(SPObject *layer)
 322 {
 323     // notify anyone who's listening to this instead of directly to the desktop
 324     _layer_changed_signal.emit(layer);
 325 }
 326
 327 }
 328
 329 /*
 330   Local Variables:
 331   mode:c++
 332   c-file-style:"stroustrup"
 333   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 334   indent-tabs-mode:nil
 335   fill-column:99
 336   End:
 337 */
 338 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :