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Sourcecode: inkscape version File versions

action.cpp

#define __SP_ACTION_C__

/*
 * Inkscape UI action implementation
 *
 * Author:
 *   Lauris Kaplinski <lauris@kaplinski.com>
 *
 * Copyright (C) 2003 Lauris Kaplinski
 *
 * This code is in public domain
 */

#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <libnr/nr-macros.h>

#include "helper/action.h"

static void sp_action_class_init (SPActionClass *klass);
static void sp_action_init (SPAction *action);
static void sp_action_finalize (NRObject *object);

static NRActiveObjectClass *parent_class;

NRType
sp_action_get_type (void)
{
      static unsigned int type = 0;
      if (!type) {
            type = nr_object_register_type (NR_TYPE_ACTIVE_OBJECT,
                                    "SPAction",
                                    sizeof (SPActionClass),
                                    sizeof (SPAction),
                                    (void (*) (NRObjectClass *)) sp_action_class_init,
                                    (void (*) (NRObject *)) sp_action_init);
      }
      return type;
}

static void
sp_action_class_init (SPActionClass *klass)
{
      NRObjectClass * object_class;

      object_class = (NRObjectClass *) klass;

      parent_class = (NRActiveObjectClass *) (((NRObjectClass *) klass)->parent);

      object_class->finalize = sp_action_finalize;
      object_class->cpp_ctor = NRObject::invoke_ctor<SPAction>;
}

static void
sp_action_init (SPAction *action)
{
      action->sensitive = 0;
      action->active = 0;
      action->view = NULL;
      action->id = action->name = action->tip = NULL;
      action->image = NULL;
}

static void
sp_action_finalize (NRObject *object)
{
      SPAction *action;

      action = (SPAction *) object;

      if (action->image) free (action->image);
      if (action->tip) free (action->tip);
      if (action->name) free (action->name);
      if (action->id) free (action->id);

      ((NRObjectClass *) (parent_class))->finalize (object);
}

SPAction *
sp_action_new(SPView *view,
              const gchar *id,
              const gchar *name,
              const gchar *tip,
              const gchar *image,
              Inkscape::Verb * verb)
{
      SPAction *action = (SPAction *)nr_object_new(SP_TYPE_ACTION);

      action->view = view;
      action->sensitive = TRUE;
      if (id) action->id = strdup (id);
      if (name) action->name = strdup (name);
      if (tip) action->tip = strdup (tip);
      if (image) action->image = strdup (image);
      action->verb = verb;

      return action;
}

/**
      \return   None
      \brief    Executes an action
      \param    action   The action to be executed
      \param    data     Data that is passed into the action.  This depends
                         on the situation that the action is used in.

      This function implements the 'action' in SPActions.  It first validates
      its parameters, making sure it got an action passed in.  Then it
      turns that action into its parent class of NRActiveObject.  The
      NRActiveObject allows for listeners to be attached to it.  This
      function goes through those listeners and calls them with the
      vector that was attached to the listener.
*/
void
00117 sp_action_perform (SPAction *action, void * data)
{
      NRActiveObject *aobject;

      nr_return_if_fail (action != NULL);
      nr_return_if_fail (SP_IS_ACTION (action));

      aobject = NR_ACTIVE_OBJECT(action);
      if (aobject->callbacks) {
            unsigned int i;
            for (i = 0; i < aobject->callbacks->length; i++) {
                  NRObjectListener *listener;
                  SPActionEventVector *avector;

                  listener = &aobject->callbacks->listeners[i];
                  avector = (SPActionEventVector *) listener->vector;

                  if ((listener->size >= sizeof (SPActionEventVector)) && avector != NULL && avector->perform != NULL) {
                        avector->perform (action, listener->data, data);
                  }
            }
      }
}

void
sp_action_set_active (SPAction *action, unsigned int active)
{
      nr_return_if_fail (action != NULL);
      nr_return_if_fail (SP_IS_ACTION (action));

      if (active != action->active) {
            NRActiveObject *aobject;
            action->active = active;
            aobject = (NRActiveObject *) action;
            if (aobject->callbacks) {
                  unsigned int i;
                  for (i = 0; i < aobject->callbacks->length; i++) {
                        NRObjectListener *listener;
                        SPActionEventVector *avector;
                        listener = aobject->callbacks->listeners + i;
                        avector = (SPActionEventVector *) listener->vector;
                        if ((listener->size >= sizeof (SPActionEventVector)) && avector->set_active) {
                              avector->set_active (action, active, listener->data);
                        }
                  }
            }
      }
}

void
sp_action_set_sensitive (SPAction *action, unsigned int sensitive)
{
      nr_return_if_fail (action != NULL);
      nr_return_if_fail (SP_IS_ACTION (action));

      if (sensitive != action->sensitive) {
            NRActiveObject *aobject;
            action->sensitive = sensitive;
            aobject = (NRActiveObject *) action;
            if (aobject->callbacks) {
                  unsigned int i;
                  for (i = 0; i < aobject->callbacks->length; i++) {
                        NRObjectListener *listener;
                        SPActionEventVector *avector;
                        listener = aobject->callbacks->listeners + i;
                        avector = (SPActionEventVector *) listener->vector;
                        if ((listener->size >= sizeof (SPActionEventVector)) && avector->set_sensitive) {
                              avector->set_sensitive (action, sensitive, listener->data);
                        }
                  }
            }
      }
}

SPView *
sp_action_get_view (SPAction *action)
{
      g_return_val_if_fail (SP_IS_ACTION (action), NULL);
      return action->view;
}


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