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#ifndef __SP_DOCUMENT_H__
#define __SP_DOCUMENT_H__

/** \file
 * SPDocument: Typed SVG document implementation
 * Authors:
 *   Lauris Kaplinski <lauris@kaplinski.com>
 *   MenTaLguY <mental@rydia.net>
 * Copyright (C) 2004-2005 MenTaLguY
 * Copyright (C) 1999-2002 Lauris Kaplinski
 * Copyright (C) 2000-2001 Ximian, Inc.
 * Released under GNU GPL, read the file 'COPYING' for more information

#include <glib-object.h>
#include <glib.h>
#include <gtk/gtksignal.h>
#include <sigc++/sigc++.h>
#include <sigc++/class_slot.h>

#include "forward.h"
#include "libcroco/cr-cascade.h"
#include "libnr/nr-forward.h"

#include "gc-managed.h"
#include "gc-finalized.h"
#include "gc-anchored.h"

namespace Inkscape {
namespace XML {
class Node;

namespace Inkscape {
namespace XML {
class Document;

namespace Inkscape {
class Selection; 
class UndoStackObserver;

class SPDocumentPrivate;

/// Typed SVG document implementation.
00052 struct SPDocument : public Inkscape::GC::Managed<>,
                    public Inkscape::GC::Finalized,
                public Inkscape::GC::Anchored
      typedef sigc::signal<void, SPObject *> IDChangedSignal;
      typedef sigc::signal<void> ResourcesChangedSignal;
      typedef sigc::signal<void, guint> ModifiedSignal;
      typedef sigc::signal<void, gchar const *> URISetSignal;
      typedef sigc::signal<void, double, double> ResizedSignal;
      typedef sigc::signal<void> ReconstructionStart;
      typedef sigc::signal<void> ReconstructionFinish;


      unsigned int keepalive : 1;
00068       unsigned int virgin    : 1; ///< Has the document never been touched?

00070       Inkscape::XML::Document *rdoc; ///< Our Inkscape::XML::Document
00071       Inkscape::XML::Node *rroot; ///< Root element of Inkscape::XML::Document
00072       SPObject *root;             ///< Our SPRoot
      CRCascade *style_cascade;

00075       gchar *uri; ///< URI string or NULL
      gchar *base;
      gchar *name;

      SPDocumentPrivate *priv;

      /// Last action key
00082       const gchar *actionkey;
      /// Handler ID
00084       guint modified_id;

      sigc::connection connectModified(ModifiedSignal::slot_type slot);
      sigc::connection connectURISet(URISetSignal::slot_type slot);
      sigc::connection connectResized(ResizedSignal::slot_type slot);

      void bindObjectToId(gchar const *id, SPObject *object);
      SPObject *getObjectById(gchar const *id);
      sigc::connection connectIdChanged(const gchar *id, IDChangedSignal::slot_type slot);

      void bindObjectToRepr(Inkscape::XML::Node *repr, SPObject *object);
      SPObject *getObjectByRepr(Inkscape::XML::Node *repr);

      void queueForOrphanCollection(SPObject *object);
      void collectOrphans();

      void _emitModified();

      GSList *_collection_queue;

      void addUndoObserver(Inkscape::UndoStackObserver& observer);
      void removeUndoObserver(Inkscape::UndoStackObserver& observer);

      SPDocument(SPDocument const &); // no copy
      void operator=(SPDocument const &); // no assign

      sigc::connection connectReconstructionStart(ReconstructionStart::slot_type slot);
      sigc::connection connectReconstructionFinish (ReconstructionFinish::slot_type  slot);
      void emitReconstructionStart (void);
      void emitReconstructionFinish  (void);

SPDocument *sp_document_new (const gchar *uri, unsigned int keepalive, bool make_new = false);
SPDocument *sp_document_new_from_mem (const gchar *buffer, gint length, unsigned int keepalive);
SPDocument *sp_document_new_dummy(); 

SPDocument *sp_document_ref (SPDocument *doc);
SPDocument *sp_document_unref (SPDocument *doc);

 * Access methods

#define sp_document_repr_doc(d) (d->rdoc)
#define sp_document_repr_root(d) (d->rroot)
#define sp_document_root(d) (d->root)
#define SP_DOCUMENT_ROOT(d)  (d->root)

gdouble sp_document_width (SPDocument * document);
gdouble sp_document_height (SPDocument * document);

struct SPUnit;

void sp_document_set_width (SPDocument * document, gdouble width, const SPUnit *unit);
void sp_document_set_height (SPDocument * document, gdouble height, const SPUnit *unit);

#define SP_DOCUMENT_URI(d) (d->uri)
#define SP_DOCUMENT_NAME(d) (d->name)
#define SP_DOCUMENT_BASE(d) (d->base)

 * Dictionary

 * Undo & redo

void sp_document_set_undo_sensitive (SPDocument * document, gboolean sensitive);
gboolean sp_document_get_undo_sensitive (SPDocument const * document);

void sp_document_clear_undo (SPDocument * document);
void sp_document_clear_redo (SPDocument * document);

void sp_document_child_added (SPDocument *doc, SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref);
void sp_document_child_removed (SPDocument *doc, SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *ref);
void sp_document_attr_changed (SPDocument *doc, SPObject *object, const gchar *key, const gchar *oldval, const gchar *newval);
void sp_document_content_changed (SPDocument *doc, SPObject *object, const gchar *oldcontent, const gchar *newcontent);
void sp_document_order_changed (SPDocument *doc, SPObject *object, Inkscape::XML::Node *child, Inkscape::XML::Node *oldref, Inkscape::XML::Node *newref);

/* Object modification root handler */
void sp_document_request_modified (SPDocument *doc);
gint sp_document_ensure_up_to_date (SPDocument *doc);

/* Save all previous actions to stack, as one undo step */
void sp_document_done (SPDocument *document);
void sp_document_maybe_done (SPDocument *document, const gchar *key);
void sp_document_reset_key (Inkscape::Application *inkscape, SPDesktop *desktop, GtkObject *base);

/* Cancel (and revert) current unsaved actions */
void sp_document_cancel (SPDocument *document);

/* Undo and redo */
gboolean sp_document_undo (SPDocument * document);
gboolean sp_document_redo (SPDocument * document);

/* Resource management */
gboolean sp_document_add_resource (SPDocument *document, const gchar *key, SPObject *object);
gboolean sp_document_remove_resource (SPDocument *document, const gchar *key, SPObject *object);
const GSList *sp_document_get_resource_list (SPDocument *document, const gchar *key);
sigc::connection sp_document_resources_changed_connect(SPDocument *document, const gchar *key, SPDocument::ResourcesChangedSignal::slot_type slot);

 * Ideas: How to overcome style invalidation nightmare
 * 1. There is reference request dictionary, that contains
 * objects (styles) needing certain id. Object::build checks
 * final id against it, and invokes necesary methods
 * 2. Removing referenced object is simply prohibited -
 * needs analyse, how we can deal with situations, where
 * we simply want to ungroup etc. - probably we need
 * Repr::reparent method :( [Or was it ;)]

 * Misc

GSList * sp_document_items_in_box (SPDocument *document, unsigned int dkey, NRRect const *box);
GSList * sp_document_partial_items_in_box (SPDocument *document, unsigned int dkey, NRRect const *box);
SPItem* sp_document_item_from_list_at_point_bottom (unsigned int dkey, SPGroup *group, const GSList *list, NR::Point const p, bool take_insensitive = false);
SPItem * sp_document_item_at_point (SPDocument *document, unsigned int key, NR::Point const p, gboolean into_groups, SPItem *upto = NULL);
SPItem * sp_document_group_at_point (SPDocument *document, unsigned int key,  NR::Point const p);

void sp_document_set_uri (SPDocument *document, const gchar *uri);
void sp_document_resized_signal_emit (SPDocument *doc, gdouble width, gdouble height);

unsigned int vacuum_document (SPDocument *document);


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