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 <sigc++/functors/mem_fun.h>
  11 #include <sigc++/adaptors/hide.h>
  12 #include "gc-managed.h"
  13 #include "gc-finalized.h"
  14 #include "document.h"
  15 #include "desktop.h"
  16 #include "layer-manager.h"
  17 #include "ui/view/view.h"
  18 #include "sp-object.h"
  19 #include "xml/node.h"
  20
  21 namespace Inkscape {
  22
  23 LayerManager::LayerManager(SPDesktop *desktop)
  24 : _desktop(desktop), _document(NULL)
  25 {
  26 //    _layer_connection = desktop->connectCurrentLayerChanged( sigc::hide<0>( sigc::mem_fun(*this, &LayerManager::_rebuild) ) );
  27
  28     sigc::bound_mem_functor1<void, Inkscape::LayerManager, SPDocument*> first = sigc::mem_fun(*this, &LayerManager::_setDocument);
  29
  30     // This next line has problems on gcc 4.0.2
  31     sigc::slot<void, SPDocument*> base2 = first;
  32
  33     sigc::slot<void,SPDesktop*,SPDocument*> slot2 = sigc::hide<0>( base2 );
  34     _document_connection = desktop->connectDocumentReplaced( slot2 );
  35
  36     _setDocument(desktop->doc());
  37 }
  38
  39 void LayerManager::_setDocument(SPDocument *document) {
  40     if (_document) {
  41         _resource_connection.disconnect();
  42     }
  43     _document = document;
  44     if (document) {
  45         _resource_connection = sp_document_resources_changed_connect(document, "layer", sigc::mem_fun(*this, &LayerManager::_rebuild));
  46     }
  47     _rebuild();
  48 }
  49
  50 void LayerManager::_rebuild() {
  51     _clear();
  52     GSList const *layers=sp_document_get_resource_list(_document, "layer");
  53     SPObject *root=_desktop->currentRoot();
  54     if ( root ) {
  55         _addOne(root);
  56
  57         for ( GSList const *iter=layers ; iter ; iter = iter->next ) {
  58             SPObject *layer=static_cast<SPObject *>(iter->data);
  59
  60             for ( SPObject* curr = layer; curr && (curr != root) ; curr = SP_OBJECT_PARENT(curr) ) {
  61                 if ( (curr != root) && root->isAncestorOf(curr) && !includes(curr) ) {
  62                     // Filter out objects in the middle of being deleted
  63
  64                     // Such may have been the cause of bug 1339397.
  65                     // See http://sourceforge.net/tracker/index.php?func=detail&aid=1339397&group_id=93438&atid=604306
  66                     SPObject const *higher = curr;
  67                     while ( higher && (SP_OBJECT_PARENT(higher) != root) ) {
  68                         higher = SP_OBJECT_PARENT(higher);
  69                     }
  70                     Inkscape::XML::Node* node = higher ? SP_OBJECT_REPR(higher) : 0;
  71                     if ( node && node->parent() ) {
  72                         _addOne(curr);
  73                     }
  74                 }
  75             }
  76         }
  77     }
  78 }
  79
  80 }
  81
  82 /*
  83   Local Variables:
  84   mode:c++
  85   c-file-style:"stroustrup"
  86   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  87   indent-tabs-mode:nil
  88   fill-column:99
  89   End:
  90 */
  91 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :