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/*
* 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"
#include "sp-root.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_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);
G_DEFINE_TYPE(SPMetadata, sp_metadata, SP_TYPE_OBJECT);
static void
sp_metadata_class_init (SPMetadataClass *klass)
{
SPObjectClass *sp_object_class = (SPObjectClass *)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);
}
}
}
/**
* 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 *) sp_metadata_parent_class)->build)
((SPObjectClass *) sp_metadata_parent_class)->build (object, document, repr);
}
/**
* Drops any allocated memory.
*/
static void sp_metadata_release(SPObject *object)
{
debug("0x%08x",(unsigned int)object);
// handle ourself
if (((SPObjectClass *) sp_metadata_parent_class)->release)
((SPObjectClass *) sp_metadata_parent_class)->release (object);
}
/**
* 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);
SP_METADATA(object); // ensures the object is of the proper type.
// see if any parents need this value
if (reinterpret_cast<SPObjectClass *>(sp_metadata_parent_class)->set) {
reinterpret_cast<SPObjectClass *>(sp_metadata_parent_class)->set(object, key, value);
}
}
/**
* 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 *) sp_metadata_parent_class)->update)
((SPObjectClass *) sp_metadata_parent_class)->update(object, ctx, flags);
}
/**
* 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 != object->getRepr() ) {
if (repr) {
repr->mergeFrom(object->getRepr(), "id");
} else {
repr = object->getRepr()->duplicate(doc);
}
}
if (((SPObjectClass *) sp_metadata_parent_class)->write) {
((SPObjectClass *) sp_metadata_parent_class)->write(object, doc, repr, flags);
}
return repr;
}
/**
* 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( document->getRoot(), NULL,
"metadata");
g_assert (nv != NULL);
return (SPMetadata *)nv;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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