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Initial revision
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@189 72102866-910b-0410-8b05-ffd578937521
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43
Headers/gnustep/base/NSObjCRuntime.h
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43
Headers/gnustep/base/NSObjCRuntime.h
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/* Interface to ObjC runtime for GNUStep
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Copyright (C) 1994 NeXT Computer, Inc.
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This file is part of the GNU Objective C Class Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __NSObjCRuntime_h_OBJECTS_INCLUDE
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#define __NSObjCRuntime_h_OBJECTS_INCLUDE
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#include <objc/objc.h>
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@class NSString;
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extern NSString *NSStringFromSelector(SEL aSelector);
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extern SEL NSSelectorFromString(NSString *aSelectorName);
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extern Class NSClassFromString(NSString *aClassName);
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extern NSString *NSStringFromClass(Class aClass);
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#ifndef YES
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#define YES 1
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#endif YES
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#ifndef NO
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#define NO 0
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#endif NO
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#ifndef nil
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#define nil 0
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#endif nil
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#endif /* __NSObjCRuntime_h_OBJECTS_INCLUDE */
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322
Source/NSGeometry.m
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322
Source/NSGeometry.m
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/* NSGeometry.c - geometry functions
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Copyright (C) 1993,1994 Free Software Foundation, Inc.
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Written by: Adam Fedor <fedor@boulder.colorado.edu>
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Date: Mar 1995
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This file is part of the GNU Objective C Class Library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <math.h>
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#include <objects/stdobjects.h>
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#include "NSGeometry.h"
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/* Create Basic Structures */
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NSPoint
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NSMakePoint(float x, float y)
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{
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NSPoint point;
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point.x = x;
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point.y = y;
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return point;
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}
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NSSize
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NSMakeSize(float w, float h)
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{
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NSSize size;
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size.width = w;
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size.height = h;
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return size;
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}
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NSRect
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NSMakeRect(float x, float y, float w, float h)
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{
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NSRect rect;
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rect.origin.x = x;
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rect.origin.y = y;
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rect.size.width = w;
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rect.size.height = h;
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return rect;
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}
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/* Get ractangle coordinates */
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float
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NSMaxX(NSRect aRect)
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{
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return aRect.origin.x + aRect.size.width;
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}
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float
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NSMaxY(NSRect aRect)
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{
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return aRect.origin.y + aRect.size.height;
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}
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float
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NSMidX(NSRect aRect)
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{
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return aRect.origin.x + aRect.size.width / 2.0;
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}
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float
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NSMidY(NSRect aRect)
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{
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return aRect.origin.y + aRect.size.height / 2.0;
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}
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float
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NSMinX(NSRect aRect)
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{
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return aRect.origin.x;
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}
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float
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NSMinY(NSRect aRect)
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{
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return aRect.origin.y;
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}
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float
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NSWidth(NSRect aRect)
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{
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return aRect.size.width;
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}
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float
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NSHeight(NSRect aRect)
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{
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return aRect.size.height;
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}
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/* Modify a copy of a rectangle */
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NSRect
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NSOffsetRect(NSRect aRect, float dx, float dy)
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{
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NSRect rect = aRect;
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rect.origin.x += dx;
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rect.origin.y += dy;
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return rect;
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}
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NSRect
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NSInsetRect(NSRect aRect, float dX, float dY)
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{
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NSRect rect;
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rect = NSOffsetRect(aRect, dX, dY);
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rect.size.width -= (2*dX);
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rect.size.height -= (2*dY);
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return rect;
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}
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NSRect
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NSIntegralRect(NSRect aRect)
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{
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NSRect rect;
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if (NSIsEmptyRect(aRect)) {
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return NSMakeRect(0, 0, 0, 0);
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}
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rect.origin.x = floor(aRect.origin.x);
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rect.origin.y = floor(aRect.origin.y);
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rect.size.width = ceil(aRect.size.width);
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rect.size.height = ceil(aRect.size.height);
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return rect;
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}
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void
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NSDivideRect(NSRect aRect, NSRect *slice, NSRect *remainder,
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float amount, NSRectEdge edge)
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{
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static NSRect sRect, rRect;
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if (!slice)
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slice = &sRect;
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if (!remainder)
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remainder = &rRect;
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if (NSIsEmptyRect(aRect)) {
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*slice = NSMakeRect(0,0,0,0);
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*remainder = NSMakeRect(0,0,0,0);
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return;
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}
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switch (edge) {
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case (NSMinXEdge):
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if (amount > aRect.size.width) {
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*slice = aRect;
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*remainder = NSMakeRect(NSMaxX(aRect), aRect.origin.y,
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0, aRect.size.height);
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} else {
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*slice = NSMakeRect(aRect.origin.x, aRect.origin.y, amount,
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aRect.size.height);
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*remainder = NSMakeRect(NSMaxX(*slice), aRect.origin.y,
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NSMaxX(aRect)-NSMaxX(*slice), aRect.size.height);
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}
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break;
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case (NSMinYEdge):
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if (amount > aRect.size.height) {
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*slice = aRect;
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*remainder = NSMakeRect(aRect.origin.x, NSMaxY(aRect),
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aRect.size.width, 0);
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} else {
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*slice = NSMakeRect(aRect.origin.x, aRect.origin.y,
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aRect.size.width, amount);
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*remainder = NSMakeRect(aRect.origin.x, NSMaxY(*slice),
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aRect.size.width, NSMaxY(aRect)-NSMaxY(*slice));
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}
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break;
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case (NSMaxXEdge):
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if (amount > aRect.size.width) {
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*slice = aRect;
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*remainder = NSMakeRect(aRect.origin.x, aRect.origin.y,
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0, aRect.size.height);
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} else {
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*slice = NSMakeRect(NSMaxX(aRect)-amount, aRect.origin.y,
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amount, aRect.size.height);
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*remainder = NSMakeRect(aRect.origin.x, aRect.origin.y,
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NSMinX(*slice)-aRect.origin.x, aRect.size.height);
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}
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break;
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case (NSMaxYEdge):
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if (amount > aRect.size.height) {
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*slice = aRect;
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*remainder = NSMakeRect(aRect.origin.x, aRect.origin.y,
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aRect.size.width, 0);
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} else {
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*slice = NSMakeRect(aRect.origin.x, NSMaxY(aRect)-amount,
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aRect.size.width, amount);
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*remainder = NSMakeRect(aRect.origin.x, aRect.origin.y,
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aRect.size.width, NSMinY(*slice)-aRect.origin.y);
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}
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break;
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default:
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break;
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}
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}
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/* Compute a third rectangle from two rectangles */
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NSRect
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NSUnionRect(NSRect aRect, NSRect bRect)
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{
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NSRect rect;
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if (NSIsEmptyRect(aRect) && NSIsEmptyRect(bRect))
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return NSMakeRect(0,0,0,0);
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else if (NSIsEmptyRect(aRect))
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return bRect;
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else if (NSIsEmptyRect(bRect))
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return aRect;
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rect = NSMakeRect(MIN(NSMinX(aRect), NSMinX(bRect)),
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MIN(NSMinY(aRect), NSMinY(bRect)), 0, 0);
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rect = NSMakeRect(NSMinX(rect), NSMinY(rect),
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MAX(NSMaxX(aRect), NSMaxX(bRect)) - NSMinX(rect),
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MAX(NSMaxY(aRect), NSMaxY(bRect)) - NSMinY(rect));
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return rect;
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}
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/* Note that intersecting at a line or a point doesn't count */
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BOOL
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NSIntersectsRect(NSRect aRect, NSRect bRect)
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{
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return (NSMaxX(aRect) <= NSMinX(bRect) || \
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NSMaxX(bRect) <= NSMinX(aRect) || \
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NSMaxY(aRect) <= NSMinY(bRect) || \
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NSMaxY(bRect) <= NSMinY(aRect)) ? NO : YES;
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}
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NSRect
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NSIntersectionRect (NSRect aRect, NSRect bRect)
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{
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NSRect rect;
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if (!NSIntersectsRect(aRect, bRect)) {
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return NSMakeRect(0, 0, 0, 0);
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}
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if (NSMinX(aRect) <= NSMinX(bRect)) {
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rect.size.width = MIN(NSMaxX(aRect), NSMaxX(bRect)) - NSMinX(bRect);
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rect.origin.x = NSMinX(bRect);
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} else {
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rect.size.width = MIN(NSMaxX(aRect), NSMaxX(bRect)) - NSMinX(aRect);
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rect.origin.x = NSMinX(aRect);
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}
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if (NSMinY(aRect) <= NSMinY(bRect)) {
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rect.size.height = MIN(NSMaxY(aRect), NSMaxY(bRect)) - NSMinY(bRect);
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rect.origin.y = NSMinY(bRect);
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} else {
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rect.size.height = MIN(NSMaxY(aRect), NSMaxY(bRect)) - NSMinY(aRect);
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rect.origin.y = NSMinY(aRect);
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}
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return rect;
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}
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/* Test geometrical relationships */
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BOOL
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NSEqualRects(NSRect aRect, NSRect bRect)
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{
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return ((NSMinX(aRect) == NSMinX(bRect))
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&& (NSMinY(aRect) == NSMinY(bRect))
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&& (NSWidth(aRect) == NSWidth(bRect))
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&& (NSHeight(aRect) == NSHeight(bRect)));
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}
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BOOL
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NSEqualSizes(NSSize aSize, NSSize bSize)
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{
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return ((aSize.width == bSize.width)
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&& (aSize.height == bSize.height));
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}
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BOOL
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NSEqualPoints(NSPoint aPoint, NSPoint bPoint)
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{
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return ((aPoint.x == bPoint.x)
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&& (aPoint.y == bPoint.y));
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}
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BOOL
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NSIsEmptyRect(NSRect aRect)
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{
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return (!((NSWidth(aRect) > 0) && (NSHeight(aRect) > 0)));
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}
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/* FIXME: what to do for flipped coordinates? */
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BOOL
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NSMouseInRect(NSPoint aPoint, NSRect aRect, BOOL flipped)
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{
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return ((aPoint.x >= NSMinX(aRect))
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&& (aPoint.y >= NSMinY(aRect))
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&& (aPoint.x <= NSMaxX(aRect))
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&& (aPoint.y <= NSMaxY(aRect)));
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}
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BOOL
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NSPointInRect(NSPoint aPoint, NSRect aRect)
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{
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return NSMouseInRect(aPoint, aRect, YES);
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}
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BOOL
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NSContainsRect(NSRect aRect, NSRect bRect)
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{
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return ((NSMinX(aRect) < NSMinX(bRect)) &&
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(NSMinY(aRect) < NSMinY(bRect)) &&
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(NSMaxX(aRect) > NSMaxX(bRect)) &&
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(NSMaxY(aRect) > NSMaxY(bRect)));
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}
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