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action.cpp

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#define __SP_ACTION_C__

/** \file
 * SPAction 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;

/**
 * Register SPAction class and return its type.
 */
NRType
00032 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;
}

/**
 * SPAction vtable initialization.
 */
static void
00050 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>;
}

/**
 * Callback for SPAction object initialization.
 */
static void
00066 sp_action_init (SPAction *action)
{
      action->sensitive = 0;
      action->active = 0;
      action->view = NULL;
      action->id = action->name = action->tip = NULL;
      action->image = NULL;
}

/**
 * Called before SPAction object destruction.
 */
static void
00079 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);
}

/**
 * Create new SPAction object and set its properties.
 */
SPAction *
00097 sp_action_new(Inkscape::UI::View::View *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
00132 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);
                  }
            }
      }
}

/**
 * Change activation in all actions that can be taken with the action.
 */
void
00160 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);
                        }
                  }
            }
      }
}

/**
 * Change sensitivity in all actions that can be taken with the action.
 */
void
00188 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);
                        }
                  }
            }
      }
}

/**
 * Return View associated with the action.
 */
Inkscape::UI::View::View *
00216 sp_action_get_view (SPAction *action)
{
      g_return_val_if_fail (SP_IS_ACTION (action), NULL);
      return action->view;
}

/*
  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 :

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