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/*
NSGeometry.m
Copyright (C) 1995, 1996 Ovidiu Predescu and Mircea Oancea.
All rights reserved.
Author: Mircea Oancea <mircea@jupiter.elcom.pub.ro>
This file is part of libFoundation.
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted, provided
that the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.
We disclaim all warranties with regard to this software, including all
implied warranties of merchantability and fitness, in no event shall
we be liable for any special, indirect or consequential damages or any
damages whatsoever resulting from loss of use, data or profits, whether in
an action of contract, negligence or other tortious action, arising out of
or in connection with the use or performance of this software.
*/
#include <math.h>
#include <Foundation/common.h>
#include <Foundation/NSGeometry.h>
#include <Foundation/NSString.h>
/*
* Useful inline functions
*/
static inline NSRect RECT(float x, float y, float w, float h)
{
NSRect rect = {{x,y},{w,h}};
return rect;
}
static inline BOOL VALID(NSRect aRect)
{
return (aRect.size.width > 0 && aRect.size.height > 0);
}
/*
* Create Basic Structures
*/
NSPoint NSMakePoint(float x, float y)
{
NSPoint point = {x,y};
return point;
}
NSSize NSMakeSize(float w, float h)
{
NSSize size = {w,h};
return size;
}
NSRect NSMakeRect(float x, float y, float w, float h)
{
NSRect rect = {{x,y},{w,h}};
return rect;
}
/*
* Get a Rectangle's Coordinates
*/
float NSMaxX(NSRect aRect)
{
return aRect.origin.x + aRect.size.width;
}
float NSMaxY(NSRect aRect)
{
return aRect.origin.y + aRect.size.height;
}
float NSMidX(NSRect aRect)
{
return aRect.origin.x + aRect.size.width / 2.0;
}
float NSMidY(NSRect aRect)
{
return aRect.origin.y + aRect.size.height / 2.0;
}
float NSMinX(NSRect aRect)
{
return aRect.origin.x;
}
float NSMinY(NSRect aRect)
{
return aRect.origin.y;
}
float NSWidth(NSRect aRect)
{
return aRect.size.width;
}
float NSHeight(NSRect aRect)
{
return aRect.size.height;
}
/*
* Modify a Copy of a Rectangle
*/
NSRect NSInsetRect(NSRect aRect, float dX, float dY)
{
return RECT(aRect.origin.x+dX,aRect.origin.y+dY,
aRect.size.width-2*dX,aRect.size.height-2*dY);
}
NSRect NSOffsetRect(NSRect aRect, float dX, float dY)
{
return RECT(aRect.origin.x+dX, aRect.origin.y+dY,
aRect.size.width, aRect.size.height);
}
void NSDivideRect(NSRect aRect, NSRect *slice, NSRect *remainder,
float amount, NSRectEdge edge)
{
NSRect dummySlice, dummyRemainder;
if (!slice)
slice = &dummySlice;
if (!remainder)
remainder = &dummyRemainder;
switch (edge) {
case (NSMinXEdge):
if (amount > aRect.size.width) {
*slice = aRect;
*remainder = RECT(aRect.origin.x + aRect.size.width,
aRect.origin.y,
0, aRect.size.height);
}
else {
*slice = RECT(aRect.origin.x, aRect.origin.y,
amount, aRect.size.height);
*remainder = RECT(aRect.origin.x+amount, aRect.origin.y,
aRect.size.width-amount, aRect.size.height);
}
break;
case (NSMinYEdge):
if (amount > aRect.size.height) {
*slice = aRect;
*remainder = RECT(aRect.origin.x,
aRect.origin.y+aRect.size.height,
aRect.size.width, 0);
}
else {
*slice = RECT(aRect.origin.x, aRect.origin.y,
aRect.size.width, amount);
*remainder = RECT(aRect.origin.x,
aRect.origin.y+amount,
aRect.size.width,
aRect.size.height-amount);
}
break;
case (NSMaxXEdge):
if (amount > aRect.size.width) {
*slice = aRect;
*remainder = RECT(aRect.origin.x, aRect.origin.y,
0, aRect.size.height);
}
else {
*slice = RECT(aRect.origin.x+aRect.size.width-amount,
aRect.origin.y, amount, aRect.size.height);
*remainder = RECT(aRect.origin.x, aRect.origin.y,
aRect.size.width-amount,
aRect.size.height);
}
break;
case (NSMaxYEdge):
if (amount > aRect.size.height) {
*slice = aRect;
*remainder = RECT(aRect.origin.x, aRect.origin.y,
aRect.size.width, 0);
}
else {
*slice = RECT(aRect.origin.x,
aRect.origin.y+aRect.size.height-amount,
aRect.size.width, amount);
*remainder = NSMakeRect(aRect.origin.x, aRect.origin.y,
aRect.size.width,
aRect.size.height-amount);
}
break;
default:
}
}
NSRect NSIntegralRect(NSRect aRect)
{
aRect.origin.x = floor(aRect.origin.x);
aRect.origin.y = floor(aRect.origin.y);
aRect.size.width = ceil(aRect.size.width);
aRect.size.height = ceil(aRect.size.height);
if (VALID(aRect))
return aRect;
else
return RECT(0,0,0,0);
}
/*
* Compute a third rectangle from two rectangles
*/
NSRect NSUnionRect(NSRect aRect, NSRect bRect)
{
float mx, my, Mx, My;
if (!VALID(aRect) && !VALID(bRect))
return RECT(0,0,0,0);
if (!VALID(aRect))
return bRect;
if (!VALID(bRect))
return aRect;
mx = MIN(aRect.origin.x, bRect.origin.x);
my = MIN(aRect.origin.y, bRect.origin.y);
Mx = MAX(aRect.origin.x+aRect.size.width,
bRect.origin.x+bRect.size.width);
My = MAX(aRect.origin.y+aRect.size.height,
bRect.origin.y+bRect.size.height);
return RECT(mx, my, Mx-mx, My-my);
}
NSRect NSIntersectionRect (NSRect aRect, NSRect bRect)
{
NSRect rect;
if (NSMaxX(aRect) <= NSMinX(bRect) ||
NSMaxX(bRect) <= NSMinX(aRect) ||
NSMaxY(aRect) <= NSMinY(bRect) ||
NSMaxY(bRect) <= NSMinY(aRect))
return RECT(0, 0, 0, 0);
if (NSMinX(aRect) <= NSMinX(bRect)) {
rect.size.width = MIN(NSMaxX(aRect), NSMaxX(bRect)) - NSMinX(bRect);
rect.origin.x = NSMinX(bRect);
} else {
rect.size.width = MIN(NSMaxX(aRect), NSMaxX(bRect)) - NSMinX(aRect);
rect.origin.x = NSMinX(aRect);
}
if (NSMinY(aRect) <= NSMinY(bRect)) {
rect.size.height = MIN(NSMaxY(aRect), NSMaxY(bRect)) - NSMinY(bRect);
rect.origin.y = NSMinY(bRect);
} else {
rect.size.height = MIN(NSMaxY(aRect), NSMaxY(bRect)) - NSMinY(aRect);
rect.origin.y = NSMinY(aRect);
}
return rect;
}
/*
* Test geometrical relationships
*/
BOOL NSEqualRects(NSRect aRect, NSRect bRect)
{
return (aRect.origin.x == bRect.origin.x &&
aRect.origin.y == bRect.origin.y &&
aRect.size.width == bRect.size.width &&
aRect.size.height == bRect.size.height) ? YES : NO;
}
BOOL NSEqualSizes(NSSize aSize, NSSize bSize)
{
return ((aSize.width == bSize.width) && (aSize.height == bSize.height));
}
BOOL NSEqualPoints(NSPoint aPoint, NSPoint bPoint)
{
return ((aPoint.x == bPoint.x) && (aPoint.y == bPoint.y));
}
BOOL NSIsEmptyRect(NSRect aRect)
{
return !VALID(aRect);
}
BOOL NSMouseInRect(NSPoint aPoint, NSRect aRect, BOOL flipped)
{
if (flipped)
return ((aPoint.x >= aRect.origin.x)
&& (aPoint.y >= aRect.origin.y)
&& (aPoint.x < aRect.origin.x+aRect.size.width)
&& (aPoint.y < aRect.origin.y+aRect.size.height));
else
return ((aPoint.x >= aRect.origin.x)
&& (aPoint.y > aRect.origin.y)
&& (aPoint.x < aRect.origin.x+aRect.size.width)
&& (aPoint.y <= aRect.origin.y+aRect.size.height));
}
BOOL NSPointInRect(NSPoint aPoint, NSRect aRect)
{
return ((aPoint.x >= aRect.origin.x)
&& (aPoint.y >= aRect.origin.y)
&& (aPoint.x < aRect.origin.x+aRect.size.width)
&& (aPoint.y < aRect.origin.y+aRect.size.height));
}
BOOL NSContainsRect(NSRect aRect, NSRect bRect)
{
if (!VALID(bRect))
return NO;
return ((NSMinX(aRect) < NSMinX(bRect)) &&
(NSMinY(aRect) < NSMinY(bRect)) &&
(NSMaxX(aRect) > NSMaxX(bRect)) &&
(NSMaxY(aRect) > NSMaxY(bRect)));
}
/*
* Get a String Representation
*/
NSString* NSStringFromPoint(NSPoint aPoint)
{
return [NSString stringWithFormat:@"{x=%f; y=%f}",
aPoint.x, aPoint.y];
}
NSString* NSStringFromRect(NSRect aRect)
{
return [NSString stringWithFormat:@"{x=%f; y=%f; width=%f; height=%f}",
aRect.origin.x, aRect.origin.y,
aRect.size.width, aRect.size.height];
}
NSString* NSStringFromSize(NSSize aSize)
{
return [NSString stringWithFormat:@"{width=%f; height=%f}",
aSize.width, aSize.height];
}
/*
* Reading from string representation
*/
NSPoint NSPointFromString(NSString* string)
{
// TODO
return NSMakePoint(0,0);
}
NSSize NSSizeFromString(NSString* string)
{
// TODO
return NSMakeSize(0,0);
}
NSRect NSRectFromString(NSString* string)
{
// TODO
return NSMakeRect(0,0,0,0);
}
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