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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_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;
}
CMetadata::CMetadata(SPMetadata* metadata) : CObject(metadata) {
this->spmetadata = metadata;
}
CMetadata::~CMetadata() {
}
static void
sp_metadata_init (SPMetadata *metadata)
{
metadata->cmetadata = new CMetadata(metadata);
metadata->cobject = metadata->cmetadata;
(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);
}
}
}
void CMetadata::onBuild(SPDocument* doc, 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);
}
}
CObject::onBuild(doc, repr);
}
/**
* 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)
{
((SPMetadata*)object)->cmetadata->onBuild(document, repr);
}
void CMetadata::onRelease() {
debug("0x%08x",(unsigned int)object);
// handle ourself
CObject::onRelease();
}
/**
* Drops any allocated memory.
*/
static void sp_metadata_release(SPObject *object)
{
((SPMetadata*)object)->cmetadata->onRelease();
}
void CMetadata::onSet(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
CObject::onSet(key, value);
}
/**
* Sets a specific value in the SPMetadata.
*/
static void sp_metadata_set(SPObject *object, unsigned int key, const gchar *value)
{
((SPMetadata*)object)->cmetadata->onSet(key, value);
}
void CMetadata::onUpdate(SPCtx* ctx, unsigned int 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? */
}
// CPPIFY: As CMetadata is derived directly from CObject, this doesn't make no sense.
// CObject::onUpdate is pure. What was the idea behind these lines?
// if (((SPObjectClass *) metadata_parent_class)->update)
// ((SPObjectClass *) metadata_parent_class)->update(object, ctx, flags);
// CObject::onUpdate(ctx, flags);
}
/**
* Receives update notifications.
*/
static void sp_metadata_update(SPObject *object, SPCtx *ctx, guint flags)
{
((SPMetadata*)object)->cmetadata->onUpdate(ctx, flags);
}
Inkscape::XML::Node* CMetadata::onWrite(Inkscape::XML::Document* doc, Inkscape::XML::Node* repr, guint flags) {
SPMetadata* object = this->spmetadata;
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);
}
}
CObject::onWrite(doc, repr, flags);
return repr;
}
/**
* 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)
{
return ((SPMetadata*)object)->cmetadata->onWrite(doc, repr, flags);
}
/**
* 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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