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 "xml/node.h"
  24 #include "xml/node-observer.h"
  25
  26 namespace Inkscape {
  27
  28
  29 using Inkscape::XML::Node;
  30
  31 class LayerManager::LayerWatcher : public Inkscape::XML::NodeObserver {
  32 public:
  33     LayerWatcher(LayerManager* mgr, SPObject* obj, sigc::connection c) :
  34         _mgr(mgr),
  35         _obj(obj),
  36         _connection(c),
  37         _lockedAttr(g_quark_from_string("sodipodi:insensitive")),
  38         _labelAttr(g_quark_from_string("inkscape:label"))
  39     {}
  40
  41     virtual void notifyChildAdded( Node &/*node*/, Node &/*child*/, Node */*prev*/ ) {}
  42     virtual void notifyChildRemoved( Node &/*node*/, Node &/*child*/, Node */*prev*/ ) {}
  43     virtual void notifyChildOrderChanged( Node &/*node*/, Node &/*child*/, Node */*old_prev*/, Node */*new_prev*/ ) {}
  44     virtual void notifyContentChanged( Node &/*node*/, Util::ptr_shared<char> /*old_content*/, Util::ptr_shared<char> /*new_content*/ ) {}
  45     virtual void notifyAttributeChanged( Node &/*node*/, GQuark name, Util::ptr_shared<char> /*old_value*/, Util::ptr_shared<char> /*new_value*/ ) {
  46         if ( name == _lockedAttr || name == _labelAttr ) {
  47             if ( _mgr && _obj ) {
  48                 _mgr->_objectModified( _obj, 0 );
  49             }
  50         }
  51     }
  52
  53     LayerManager* _mgr;
  54     SPObject* _obj;
  55     sigc::connection _connection;
  56     GQuark _lockedAttr;
  57     GQuark _labelAttr;
  58 };
  59
  60
  61 LayerManager::LayerManager(SPDesktop *desktop)
  62 : _desktop(desktop), _document(NULL)
  63 {
  64     _layer_connection = desktop->connectCurrentLayerChanged( sigc::mem_fun(*this, &LayerManager::_selectedLayerChanged) );
  65
  66     sigc::bound_mem_functor1<void, Inkscape::LayerManager, SPDocument*> first = sigc::mem_fun(*this, &LayerManager::_setDocument);
  67
  68     // This next line has problems on gcc 4.0.2
  69     sigc::slot<void, SPDocument*> base2 = first;
  70
  71     sigc::slot<void,SPDesktop*,SPDocument*> slot2 = sigc::hide<0>( base2 );
  72     _document_connection = desktop->connectDocumentReplaced( slot2 );
  73
  74     _setDocument(desktop->doc());
  75 }
  76
  77 LayerManager::~LayerManager()
  78 {
  79     _layer_connection.disconnect();
  80     _document_connection.disconnect();
  81     _resource_connection.disconnect();
  82 }
  83
  84 void LayerManager::setCurrentLayer( SPObject* obj )
  85 {
  86     //g_return_if_fail( _desktop->currentRoot() );
  87     if ( _desktop->currentRoot() ) {
  88         _desktop->setCurrentLayer( obj );
  89
  90         if ( prefs_get_int_attribute_limited("options.selection", "layerdeselect", 1, 0, 1) ) {
  91             sp_desktop_selection( _desktop )->clear();
  92         }
  93     }
  94 }
  95
  96 void LayerManager::renameLayer( SPObject* obj, gchar const *label )
  97 {
  98     Glib::ustring incoming( label ? label : "" );
  99     Glib::ustring result(incoming);
 100     Glib::ustring base(incoming);
 101     guint startNum = 1;
 102
 103     Glib::ustring::size_type pos = base.rfind('#');
 104     if ( pos != Glib::ustring::npos ) {
 105         gchar* numpart = g_strdup(base.substr(pos+1).c_str());
 106         if ( numpart ) {
 107             gchar* endPtr = 0;
 108             guint64 val = g_ascii_strtoull( numpart, &endPtr, 10);
 109             if ( ((val > 0) || (endPtr != numpart)) && (val < 65536) ) {
 110                 base.erase( pos );
 111                 result = base;
 112                 startNum = static_cast<int>(val);
 113             }
 114             g_free(numpart);
 115         }
 116     }
 117
 118     std::set<Glib::ustring> currentNames;
 119     GSList const *layers=sp_document_get_resource_list(_document, "layer");
 120     SPObject *root=_desktop->currentRoot();
 121     if ( root ) {
 122         for ( GSList const *iter=layers ; iter ; iter = iter->next ) {
 123             SPObject *layer=static_cast<SPObject *>(iter->data);
 124             if ( layer != obj ) {
 125                 currentNames.insert( layer->label() ? Glib::ustring(layer->label()) : Glib::ustring() );
 126             }
 127         }
 128     }
 129
 130     // Not sure if we need to cap it, but we'll just be paranoid for the moment
 131     // Intentionally unsigned
 132     guint endNum = startNum + 3000;
 133     for ( guint i = startNum; (i < endNum) && (currentNames.find(result) != currentNames.end()); i++ ) {
 134         gchar* suffix = g_strdup_printf("#%d", i);
 135         result = base;
 136         result += suffix;
 137
 138         g_free(suffix);
 139     }
 140
 141     obj->setLabel( result.c_str() );
 142 }
 143
 144
 145
 146 void LayerManager::_setDocument(SPDocument *document) {
 147     if (_document) {
 148         _resource_connection.disconnect();
 149     }
 150     _document = document;
 151     if (document) {
 152         _resource_connection = sp_document_resources_changed_connect(document, "layer", sigc::mem_fun(*this, &LayerManager::_rebuild));
 153     }
 154     _rebuild();
 155 }
 156
 157 void LayerManager::_objectModified( SPObject* obj, guint /*flags*/ )
 158 {
 159     _details_changed_signal.emit( obj );
 160 }
 161
 162 void LayerManager::_rebuild() {
 163     while ( !_watchers.empty() ) {
 164         LayerWatcher* one = _watchers.back();
 165         _watchers.pop_back();
 166         if ( one->_obj ) {
 167             Node* node = SP_OBJECT_REPR(one->_obj);
 168             if ( node ) {
 169                 node->removeObserver(*one);
 170             }
 171             one->_connection.disconnect();
 172         }
 173     }
 174
 175     _clear();
 176
 177     if (!_document) // http://sourceforge.net/mailarchive/forum.php?thread_name=5747bce9a7ed077c1b4fc9f0f4f8a5e0%40localhost&forum_name=inkscape-devel
 178         return;
 179
 180     GSList const *layers=sp_document_get_resource_list(_document, "layer");
 181     SPObject *root=_desktop->currentRoot();
 182     if ( root ) {
 183         _addOne(root);
 184
 185         for ( GSList const *iter=layers ; iter ; iter = iter->next ) {
 186             SPObject *layer=static_cast<SPObject *>(iter->data);
 187
 188             for ( SPObject* curr = layer; curr && (curr != root) ; curr = SP_OBJECT_PARENT(curr) ) {
 189                 if ( (curr != root) && root->isAncestorOf(curr) && !includes(curr) ) {
 190                     // Filter out objects in the middle of being deleted
 191
 192                     // Such may have been the cause of bug 1339397.
 193                     // See http://sourceforge.net/tracker/index.php?func=detail&aid=1339397&group_id=93438&atid=604306
 194
 195                     SPObject const *higher = curr;
 196                     while ( higher && (SP_OBJECT_PARENT(higher) != root) ) {
 197                         higher = SP_OBJECT_PARENT(higher);
 198                     }
 199                     Node* node = higher ? SP_OBJECT_REPR(higher) : 0;
 200                     if ( node && node->parent() ) {
 201                         sigc::connection connection = curr->connectModified(sigc::mem_fun(*this, &LayerManager::_objectModified));
 202
 203                         LayerWatcher *eye = new LayerWatcher(this, curr, connection);
 204                         _watchers.push_back( eye );
 205                         SP_OBJECT_REPR(curr)->addObserver(*eye);
 206
 207                         _addOne(curr);
 208                     }
 209                 }
 210             }
 211         }
 212     }
 213 }
 214
 215 // Connected to the desktop's CurrentLayerChanged signal
 216 void LayerManager::_selectedLayerChanged(SPObject *layer)
 217 {
 218     // notify anyone who's listening to this instead of directly to the desktop
 219     _layer_changed_signal.emit(layer);
 220 }
 221
 222 }
 223
 224 /*
 225   Local Variables:
 226   mode:c++
 227   c-file-style:"stroustrup"
 228   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 229   indent-tabs-mode:nil
 230   fill-column:99
 231   End:
 232 */
 233 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :