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//
// NSWindow+RHPreventCaptureAdditions.m
//
// Created by Richard Heard on 7/03/13.
// Copyright (c) 2013 Richard Heard. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#if defined(INCLUDE_PRIVATE_API) && INCLUDE_PRIVATE_API
#import "NSWindow+RHPreventCaptureAdditions.h"
@implementation NSWindow (RHPreventCaptureAdditions)
-(BOOL)preventWindowFromBeingCaptured{
return RHPreventWindowCaptureForWindow(self);
}
@end
//define the private CGS methods we need to exclude a window from being captured.
// ------ PRIVATE API ------
typedef int CGSConnectionID;
typedef int CGSWindowID;
typedef CFTypeRef CGSRegionRef;
CG_EXTERN CGSConnectionID CGSMainConnectionID(void);
CG_EXTERN CGError CGSGetWindowBounds(CGSConnectionID cid, CGSWindowID wid, CGRect *rectOut);
CG_EXTERN CGError CGSNewRegionWithRect(const CGRect *rect, CGSRegionRef *regionOut);
CG_EXTERN bool CGSRegionIsEmpty(CGSRegionRef region);
CG_EXTERN CGError CGSReleaseRegion(CGSRegionRef region);
CG_EXTERN CGError CGSSetWindowCaptureExcludeShape(CGSConnectionID cid, CGSWindowID wid, CGSRegionRef region);
// ------ END PRIVATE API ------
//implementation
BOOL RHPreventWindowCaptureForWindow(NSWindow *window){
CGSConnectionID cid = CGSMainConnectionID();
CGSWindowID wid = (int)window.windowNumber;
CGRect windowRectOut;
CGError err = CGSGetWindowBounds(cid, wid, &windowRectOut);
if (err != kCGErrorSuccess){
NSLog(@"Error: failed to get windows bounds with error %i", err);
return NO;
}
windowRectOut.origin = CGPointZero;
CGSRegionRef regionOut;
err = CGSNewRegionWithRect(&windowRectOut, &regionOut);
if (err != kCGErrorSuccess){
NSLog(@"Error: failed to get create CGSRegion with error %i", err);
return NO;
}
//CFShow(regionOut);
err = CGSSetWindowCaptureExcludeShape(cid, wid, regionOut);
if (err != kCGErrorSuccess){
NSLog(@"Error: failed to set capture exclude shape for window with error %i", err);
CGSReleaseRegion(regionOut);
return NO;
}
CGSReleaseRegion(regionOut);
return YES;
}
#endif