diff options
Diffstat (limited to 'src/sp-metadata.cpp')
| -rw-r--r-- | src/sp-metadata.cpp | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/src/sp-metadata.cpp b/src/sp-metadata.cpp new file mode 100644 index 000000000..0f4b1fb1d --- /dev/null +++ b/src/sp-metadata.cpp @@ -0,0 +1,223 @@ +#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::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) +{ + 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::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(); + } + } + + if (((SPObjectClass *) metadata_parent_class)->write) + ((SPObjectClass *) metadata_parent_class)->write(object, 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 : |