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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-
nautilus-region.c: A simple wrapper on GdkRegion with rectangle operations.
Copyright (C) 2000 Eazel, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public
License along with this program; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Author: Ramiro Estrugo <ramiro@eazel.com>
*/
#include <config.h>
#include "nautilus-region.h"
#include "nautilus-glib-extensions.h"
#include "nautilus-art-gtk-extensions.h"
struct NautilusRegion
{
GdkRegion *gdk_region;
};
NautilusRegion *
nautilus_region_new (void)
{
NautilusRegion *region;
region = g_new0 (NautilusRegion, 1);
region->gdk_region = gdk_region_new ();
return region;
}
void
nautilus_region_free (NautilusRegion *region)
{
if (region == NULL) {
return;
}
g_assert (region->gdk_region != NULL);
gdk_region_destroy (region->gdk_region);
g_free (region);
}
static GdkRegion *
gdk_region_new_from_irect (const ArtIRect *art_rect)
{
GdkRegion *region;
GdkRegion *empty_region;
GdkRectangle gdk_rect;
g_return_val_if_fail (art_rect != NULL, NULL);
gdk_rect = nautilus_art_irect_to_gdk_rectangle (art_rect);
empty_region = gdk_region_new ();
region = gdk_region_union_with_rect (empty_region, &gdk_rect);
gdk_region_destroy (empty_region);
return region;
}
void
nautilus_region_add_rectangle (NautilusRegion *region,
const ArtIRect *rectangle)
{
GdkRegion *add_region;
GdkRegion *new_region;
g_return_if_fail (region != NULL);
g_return_if_fail (rectangle != NULL);
g_return_if_fail (!art_irect_empty (rectangle));
add_region = gdk_region_new_from_irect (rectangle);
new_region = gdk_regions_union (region->gdk_region, add_region);
gdk_region_destroy (add_region);
gdk_region_destroy (region->gdk_region);
region->gdk_region = new_region;
}
void
nautilus_region_subtract_rectangle (NautilusRegion *region,
const ArtIRect *rectangle)
{
GdkRegion *subtract_region;
GdkRegion *new_region;
g_return_if_fail (region != NULL);
g_return_if_fail (rectangle != NULL);
g_return_if_fail (!art_irect_empty (rectangle));
subtract_region = gdk_region_new_from_irect (rectangle);
new_region = gdk_regions_subtract (region->gdk_region, subtract_region);
gdk_region_destroy (subtract_region);
gdk_region_destroy (region->gdk_region);
region->gdk_region = new_region;
}
void
nautilus_region_set_gc_clip_region (const NautilusRegion *region,
GdkGC *gc)
{
g_return_if_fail (region != NULL);
g_return_if_fail (gc != NULL);
gdk_gc_set_clip_region (gc, region->gdk_region);
}
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