mirror of
https://gitlab.gnome.org/GNOME/nautilus
synced 2024-09-17 23:01:59 +00:00
7e668edf20
2008-12-15 Alexander Larsson <alexl@redhat.com> * Makefile.am: * acconfig.h: * configure.in: * eel/ * libnautilus-private/Makefile.am: Import eel into nautilus. svn path=/trunk/; revision=14815
309 lines
7 KiB
C
309 lines
7 KiB
C
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
|
|
|
|
/* eel-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 "eel-art-extensions.h"
|
|
#include "eel-lib-self-check-functions.h"
|
|
#include <math.h>
|
|
|
|
const EelDRect eel_drect_empty = { 0.0, 0.0, 0.0, 0.0 };
|
|
const EelIRect eel_irect_empty = { 0, 0, 0, 0 };
|
|
const EelIPoint eel_ipoint_max = { G_MAXINT, G_MAXINT };
|
|
const EelIPoint eel_ipoint_min = { G_MININT, G_MININT };
|
|
const EelIPoint eel_ipoint_zero = { 0, 0 };
|
|
const EelDimensions eel_dimensions_empty = { 0, 0 };
|
|
|
|
void
|
|
eel_irect_copy (EelIRect *dest, const EelIRect *src)
|
|
{
|
|
dest->x0 = src->x0;
|
|
dest->y0 = src->y0;
|
|
dest->x1 = src->x1;
|
|
dest->y1 = src->y1;
|
|
}
|
|
|
|
void
|
|
eel_irect_union (EelIRect *dest,
|
|
const EelIRect *src1,
|
|
const EelIRect *src2) {
|
|
if (eel_irect_is_empty (src1)) {
|
|
eel_irect_copy (dest, src2);
|
|
} else if (eel_irect_is_empty (src2)) {
|
|
eel_irect_copy (dest, src1);
|
|
} else {
|
|
dest->x0 = MIN (src1->x0, src2->x0);
|
|
dest->y0 = MIN (src1->y0, src2->y0);
|
|
dest->x1 = MAX (src1->x1, src2->x1);
|
|
dest->y1 = MAX (src1->y1, src2->y1);
|
|
}
|
|
}
|
|
|
|
void
|
|
eel_irect_intersect (EelIRect *dest,
|
|
const EelIRect *src1,
|
|
const EelIRect *src2)
|
|
{
|
|
dest->x0 = MAX (src1->x0, src2->x0);
|
|
dest->y0 = MAX (src1->y0, src2->y0);
|
|
dest->x1 = MIN (src1->x1, src2->x1);
|
|
dest->y1 = MIN (src1->y1, src2->y1);
|
|
}
|
|
|
|
gboolean
|
|
eel_irect_is_empty (const EelIRect *src)
|
|
{
|
|
return (src->x1 <= src->x0 ||
|
|
src->y1 <= src->y0);
|
|
}
|
|
|
|
EelIRect
|
|
eel_irect_assign (int x,
|
|
int y,
|
|
int width,
|
|
int height)
|
|
{
|
|
EelIRect rectangle;
|
|
|
|
rectangle.x0 = x;
|
|
rectangle.y0 = y;
|
|
rectangle.x1 = rectangle.x0 + width;
|
|
rectangle.y1 = rectangle.y0 + height;
|
|
|
|
return rectangle;
|
|
}
|
|
|
|
/**
|
|
* eel_irect_assign_dimensions:
|
|
*
|
|
* @x: X coodinate for resulting rectangle.
|
|
* @y: Y coodinate for resulting rectangle.
|
|
* @dimensions: A EelDimensions structure for the rect's width and height.
|
|
*
|
|
* Returns: An EelIRect with the given coordinates and dimensions.
|
|
*/
|
|
EelIRect
|
|
eel_irect_assign_dimensions (int x,
|
|
int y,
|
|
EelDimensions dimensions)
|
|
{
|
|
EelIRect rectangle;
|
|
|
|
rectangle.x0 = x;
|
|
rectangle.y0 = y;
|
|
rectangle.x1 = rectangle.x0 + dimensions.width;
|
|
rectangle.y1 = rectangle.y0 + dimensions.height;
|
|
|
|
return rectangle;
|
|
}
|
|
|
|
/**
|
|
* eel_irect_get_width:
|
|
*
|
|
* @rectangle: An EelIRect.
|
|
*
|
|
* Returns: The width of the rectangle.
|
|
*
|
|
*/
|
|
int
|
|
eel_irect_get_width (EelIRect rectangle)
|
|
{
|
|
return rectangle.x1 - rectangle.x0;
|
|
}
|
|
|
|
/**
|
|
* eel_irect_get_height:
|
|
*
|
|
* @rectangle: An EelIRect.
|
|
*
|
|
* Returns: The height of the rectangle.
|
|
*
|
|
*/
|
|
int
|
|
eel_irect_get_height (EelIRect rectangle)
|
|
{
|
|
return rectangle.y1 - rectangle.y0;
|
|
}
|
|
|
|
|
|
static void
|
|
eel_drect_copy (EelDRect *dest,
|
|
const EelDRect *src)
|
|
{
|
|
dest->x0 = src->x0;
|
|
dest->y0 = src->y0;
|
|
dest->x1 = src->x1;
|
|
dest->y1 = src->y1;
|
|
}
|
|
|
|
static gboolean
|
|
eel_drect_is_empty (const EelDRect *src)
|
|
{
|
|
return (src->x1 <= src->x0 || src->y1 <= src->y0);
|
|
}
|
|
|
|
void
|
|
eel_drect_union (EelDRect *dest,
|
|
const EelDRect *src1,
|
|
const EelDRect *src2)
|
|
{
|
|
if (eel_drect_is_empty (src1)) {
|
|
eel_drect_copy (dest, src2);
|
|
} else if (eel_drect_is_empty (src2)) {
|
|
eel_drect_copy (dest, src1);
|
|
} else {
|
|
dest->x0 = MIN (src1->x0, src2->x0);
|
|
dest->y0 = MIN (src1->y0, src2->y0);
|
|
dest->x1 = MAX (src1->x1, src2->x1);
|
|
dest->y1 = MAX (src1->y1, src2->y1);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_irect_contains_point:
|
|
*
|
|
* @rectangle: An EelIRect.
|
|
* @x: X coordinate to test.
|
|
* @y: Y coordinate to test.
|
|
*
|
|
* Returns: A boolean value indicating whether the rectangle
|
|
* contains the x,y coordinate.
|
|
*
|
|
*/
|
|
gboolean
|
|
eel_irect_contains_point (EelIRect rectangle,
|
|
int x,
|
|
int y)
|
|
{
|
|
return x >= rectangle.x0
|
|
&& x <= rectangle.x1
|
|
&& y >= rectangle.y0
|
|
&& y <= rectangle.y1;
|
|
}
|
|
|
|
gboolean
|
|
eel_irect_hits_irect (EelIRect rectangle_a,
|
|
EelIRect rectangle_b)
|
|
{
|
|
EelIRect intersection;
|
|
eel_irect_intersect (&intersection, &rectangle_a, &rectangle_b);
|
|
return !eel_irect_is_empty (&intersection);
|
|
}
|
|
|
|
gboolean
|
|
eel_irect_equal (EelIRect rectangle_a,
|
|
EelIRect rectangle_b)
|
|
{
|
|
return rectangle_a.x0 == rectangle_b.x0
|
|
&& rectangle_a.y0 == rectangle_b.y0
|
|
&& rectangle_a.x1 == rectangle_b.x1
|
|
&& rectangle_a.y1 == rectangle_b.y1;
|
|
}
|
|
|
|
/**
|
|
* eel_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.
|
|
*/
|
|
EelIRect
|
|
eel_irect_align (EelIRect container,
|
|
int aligned_width,
|
|
int aligned_height,
|
|
float x_alignment,
|
|
float y_alignment)
|
|
{
|
|
EelIRect aligned;
|
|
int available_width;
|
|
int available_height;
|
|
|
|
if (eel_irect_is_empty (&container)) {
|
|
return eel_irect_empty;
|
|
}
|
|
|
|
if (aligned_width == 0 || aligned_height == 0) {
|
|
return eel_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 = eel_irect_get_width (container) - aligned_width;
|
|
available_height = eel_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;
|
|
}
|
|
|
|
|
|
/**
|
|
* eel_dimensions_are_empty:
|
|
*
|
|
* @dimensions: A EelDimensions structure.
|
|
*
|
|
* Returns: Whether the dimensions are empty.
|
|
*/
|
|
gboolean
|
|
eel_dimensions_are_empty (EelDimensions dimensions)
|
|
{
|
|
return dimensions.width <= 0 || dimensions.height <= 0;
|
|
}
|
|
|
|
EelIRect
|
|
eel_irect_offset_by (EelIRect rectangle, int x, int y)
|
|
{
|
|
rectangle.x0 += x;
|
|
rectangle.x1 += x;
|
|
rectangle.y0 += y;
|
|
rectangle.y1 += y;
|
|
|
|
return rectangle;
|
|
}
|
|
|
|
EelIRect
|
|
eel_irect_scale_by (EelIRect rectangle, double scale)
|
|
{
|
|
rectangle.x0 *= scale;
|
|
rectangle.x1 *= scale;
|
|
rectangle.y0 *= scale;
|
|
rectangle.y1 *= scale;
|
|
|
|
return rectangle;
|
|
}
|