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#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);
if ( 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 :
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