#define __SP_METADATA_C__ /* * SVG <metadata> implementation * * Authors: * Kees Cook <kees@outflux.net> * * Copyright (C) 2004 Kees Cook * * Released under GNU GPL, read the file 'COPYING' for more information */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "sp-metadata.h" #include "xml/node-iterators.h" #include "document.h" #include "sp-item-group.h" #define noDEBUG_METADATA #ifdef DEBUG_METADATA # define debug(f, a...) { g_print("%s(%d) %s:", \ __FILE__,__LINE__,__FUNCTION__); \ g_print(f, ## a); \ g_print("\n"); \ } #else # define debug(f, a...) /**/ #endif /* Metadata base class */ static void sp_metadata_class_init (SPMetadataClass *klass); static void sp_metadata_init (SPMetadata *metadata); static void sp_metadata_build (SPObject * object, SPDocument * document, Inkscape::XML::Node * repr); static void sp_metadata_release (SPObject *object); static void sp_metadata_set (SPObject *object, unsigned int key, const gchar *value); static void sp_metadata_update(SPObject *object, SPCtx *ctx, guint flags); static Inkscape::XML::Node *sp_metadata_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags); static SPObjectClass *metadata_parent_class; GType sp_metadata_get_type (void) { static GType metadata_type = 0; if (!metadata_type) { GTypeInfo metadata_info = { sizeof (SPMetadataClass), NULL, NULL, (GClassInitFunc) sp_metadata_class_init, NULL, NULL, sizeof (SPMetadata), 16, (GInstanceInitFunc) sp_metadata_init, NULL, /* value_table */ }; metadata_type = g_type_register_static (SP_TYPE_OBJECT, "SPMetadata", &metadata_info, (GTypeFlags)0); } return metadata_type; } static void sp_metadata_class_init (SPMetadataClass *klass) { //GObjectClass *gobject_class = (GObjectClass *)klass; SPObjectClass *sp_object_class = (SPObjectClass *)klass; metadata_parent_class = (SPObjectClass*)g_type_class_peek_parent (klass); sp_object_class->build = sp_metadata_build; sp_object_class->release = sp_metadata_release; sp_object_class->write = sp_metadata_write; sp_object_class->set = sp_metadata_set; sp_object_class->update = sp_metadata_update; } static void sp_metadata_init (SPMetadata *metadata) { (void)metadata; debug("0x%08x",(unsigned int)metadata); } namespace { void strip_ids_recursively(Inkscape::XML::Node *node) { using Inkscape::XML::NodeSiblingIterator; if ( node->type() == Inkscape::XML::ELEMENT_NODE ) { node->setAttribute("id", NULL); } for ( NodeSiblingIterator iter=node->firstChild() ; iter ; ++iter ) { strip_ids_recursively(iter); } } } /* * \brief Reads the Inkscape::XML::Node, and initializes SPMetadata variables. * For this to get called, our name must be associated with * a repr via "sp_object_type_register". Best done through * sp-object-repr.cpp's repr_name_entries array. */ static void sp_metadata_build (SPObject *object, SPDocument *document, Inkscape::XML::Node *repr) { using Inkscape::XML::NodeSiblingIterator; debug("0x%08x",(unsigned int)object); /* clean up our mess from earlier versions; elements under rdf:RDF should not * have id= attributes... */ static GQuark const rdf_root_name=g_quark_from_static_string("rdf:RDF"); for ( NodeSiblingIterator iter=repr->firstChild() ; iter ; ++iter ) { if ( (GQuark)iter->code() == rdf_root_name ) { strip_ids_recursively(iter); } } if (((SPObjectClass *) metadata_parent_class)->build) ((SPObjectClass *) metadata_parent_class)->build (object, document, repr); } /* * \brief Drops any allocated memory */ static void sp_metadata_release (SPObject *object) { debug("0x%08x",(unsigned int)object); /* handle ourself */ if (((SPObjectClass *) metadata_parent_class)->release) ((SPObjectClass *) metadata_parent_class)->release (object); } /* * \brief Sets a specific value in the SPMetadata */ static void sp_metadata_set (SPObject *object, unsigned int key, const gchar *value) { debug("0x%08x %s(%u): '%s'",(unsigned int)object, sp_attribute_name(key),key,value); SPMetadata * metadata; metadata = SP_METADATA (object); /* see if any parents need this value */ if (((SPObjectClass *) metadata_parent_class)->set) ((SPObjectClass *) metadata_parent_class)->set (object, key, value); } /* * \brief Receives update notifications */ static void sp_metadata_update(SPObject *object, SPCtx *ctx, guint flags) { debug("0x%08x",(unsigned int)object); //SPMetadata *metadata = SP_METADATA(object); if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) { /* do something? */ } if (((SPObjectClass *) metadata_parent_class)->update) ((SPObjectClass *) metadata_parent_class)->update(object, ctx, flags); } /* * \brief Writes it's settings to an incoming repr object, if any */ static Inkscape::XML::Node * sp_metadata_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags) { debug("0x%08x",(unsigned int)object); //SPMetadata *metadata = SP_METADATA(object); // only create a repr when we're writing out an Inkscape SVG if ( flags & SP_OBJECT_WRITE_EXT && repr != SP_OBJECT_REPR(object) ) { if (repr) { repr->mergeFrom(SP_OBJECT_REPR (object), "id"); } else { repr = SP_OBJECT_REPR (object)->duplicate(doc); } } if (((SPObjectClass *) metadata_parent_class)->write) ((SPObjectClass *) metadata_parent_class)->write(object, doc, repr, flags); return repr; } /* * \brief Retrieves the metadata object associated with a document */ SPMetadata * sp_document_metadata (SPDocument *document) { SPObject *nv; g_return_val_if_fail (document != NULL, NULL); nv = sp_item_group_get_child_by_name ((SPGroup *) document->root, NULL, "metadata"); g_assert (nv != NULL); return (SPMetadata *)nv; } // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :