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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* nautilus-art-extensions.c - implementation of libart extension functions.
Copyright (C) 2000 Eazel, Inc.
The Gnome Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The Gnome Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the Gnome Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Authors: Darin Adler <darin@eazel.com>
Ramiro Estrugo <ramiro@eazel.com>
*/
#include <config.h>
#include "nautilus-art-extensions.h"
#include <math.h>
ArtIRect NAUTILUS_ART_IRECT_EMPTY = { 0, 0, 0, 0 };
NautilusArtIPoint NAUTILUS_ART_IPOINT_ZERO = { 0, 0 };
gboolean
nautilus_art_irect_contains_irect (const ArtIRect *outer_rect,
const ArtIRect *inner_rect)
{
g_return_val_if_fail (outer_rect != NULL, FALSE);
g_return_val_if_fail (inner_rect != NULL, FALSE);
return outer_rect->x0 <= inner_rect->x0
&& outer_rect->y0 <= inner_rect->y0
&& outer_rect->x1 >= inner_rect->x1
&& outer_rect->y1 >= inner_rect->y1;
}
/**
* nautilus_art_irect_contains_point:
*
* @rectangle: An ArtIRect.
* @x: X coordinate to test.
* @y: Y coordinate to test.
*
* Returns: A boolean value indicating whether the rectangle
* contains the x,y coordinate.
*
*/
gboolean
nautilus_art_irect_contains_point (const ArtIRect *rectangle,
int x,
int y)
{
g_return_val_if_fail (rectangle != NULL, FALSE);
return x >= rectangle->x0
&& x <= rectangle->x1
&& y >= rectangle->y0
&& y <= rectangle->y1;
}
gboolean
nautilus_art_irect_hits_irect (const ArtIRect *rect_a,
const ArtIRect *rect_b)
{
ArtIRect intersection;
g_return_val_if_fail (rect_a != NULL, FALSE);
g_return_val_if_fail (rect_b != NULL, FALSE);
art_irect_intersect (&intersection, rect_a, rect_b);
return !art_irect_empty (&intersection);
}
gboolean
nautilus_art_irect_equal (const ArtIRect *rect_a,
const ArtIRect *rect_b)
{
g_return_val_if_fail (rect_a != NULL, FALSE);
g_return_val_if_fail (rect_b != NULL, FALSE);
return rect_a->x0 == rect_b->x0
&& rect_a->y0 == rect_b->y0
&& rect_a->x1 == rect_b->x1
&& rect_a->y1 == rect_b->y1;
}
gboolean
nautilus_art_drect_equal (const ArtDRect *rect_a,
const ArtDRect *rect_b)
{
g_return_val_if_fail (rect_a != NULL, FALSE);
g_return_val_if_fail (rect_b != NULL, FALSE);
return rect_a->x0 == rect_b->x0
&& rect_a->y0 == rect_b->y0
&& rect_a->x1 == rect_b->x1
&& rect_a->y1 == rect_b->y1;
}
void
nautilus_art_irect_assign (ArtIRect *rect,
int x,
int y,
int width,
int height)
{
g_return_if_fail (rect != NULL);
rect->x0 = x;
rect->y0 = y;
rect->x1 = rect->x0 + width;
rect->y1 = rect->y0 + height;
}
void
nautilus_art_ipoint_assign (NautilusArtIPoint *point,
int x,
int y)
{
g_return_if_fail (point != NULL);
point->x = x;
point->y = y;
}
/**
* nautilus_art_irect_get_width:
*
* @rectangle: An ArtIRect.
*
* Returns: The width of the rectangle.
*
*/
int
nautilus_art_irect_get_width (const ArtIRect *rectangle)
{
g_return_val_if_fail (rectangle != NULL, 0);
return rectangle->x1 - rectangle->x0;
}
/**
* nautilus_art_irect_get_height:
*
* @rectangle: An ArtIRect.
*
* Returns: The height of the rectangle.
*
*/
int
nautilus_art_irect_get_height (const ArtIRect *rectangle)
{
g_return_val_if_fail (rectangle != NULL, 0);
return rectangle->y1 - rectangle->y0;
}
/**
* nautilus_art_irect_align:
*
* @container: The rectangle that is to contain the aligned rectangle.
* @aligned_width: Width of rectangle being algined.
* @aligned_height: Height of rectangle being algined.
* @x_alignment: X alignment.
* @y_alignment: Y alignment.
*
* Returns: A rectangle aligned within a container rectangle
* using the given alignment parameters.
*/
ArtIRect
nautilus_art_irect_align (const ArtIRect *container,
int aligned_width,
int aligned_height,
float x_alignment,
float y_alignment)
{
ArtIRect aligned;
int available_width;
int available_height;
g_return_val_if_fail (container != NULL, NAUTILUS_ART_IRECT_EMPTY);
if (art_irect_empty (container)) {
return NAUTILUS_ART_IRECT_EMPTY;
}
if (aligned_width == 0 || aligned_height == 0) {
return NAUTILUS_ART_IRECT_EMPTY;
}
/* Make sure the aligment parameters are within range */
x_alignment = MAX (0, x_alignment);
x_alignment = MIN (1.0, x_alignment);
y_alignment = MAX (0, y_alignment);
y_alignment = MIN (1.0, y_alignment);
available_width = nautilus_art_irect_get_width (container) - aligned_width;
available_height = nautilus_art_irect_get_height (container) - aligned_height;
aligned.x0 = floor (container->x0 + (available_width * x_alignment) + 0.5);
aligned.y0 = floor (container->y0 + (available_height * y_alignment) + 0.5);
aligned.x1 = aligned.x0 + aligned_width;
aligned.y1 = aligned.y0 + aligned_height;
return aligned;
}
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