54 lines
1.8 KiB
Objective-C
54 lines
1.8 KiB
Objective-C
// 19 may 2017
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#import "uipriv_darwin.h"
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// functions and constants FROM THE FUTURE!
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// note: for constants, dlsym() returns the address of the constant itself, as if we had done &constantName
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// added in OS X 10.10; we need 10.8
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CFStringRef *uiprivFUTURE_kCTFontOpenTypeFeatureTag = NULL;
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CFStringRef *uiprivFUTURE_kCTFontOpenTypeFeatureValue = NULL;
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// added in OS X 10.12; we need 10.8
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CFStringRef *uiprivFUTURE_kCTBackgroundColorAttributeName = NULL;
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// note that we treat any error as "the symbols aren't there" (and don't care if dlclose() failed)
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void uiprivLoadFutures(void)
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{
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void *handle;
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// dlsym() walks the dependency chain, so opening the current process should be sufficient
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handle = dlopen(NULL, RTLD_LAZY);
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if (handle == NULL)
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return;
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#define GET(var, fn) *((void **) (&var)) = dlsym(handle, #fn)
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GET(uiprivFUTURE_kCTFontOpenTypeFeatureTag, kCTFontOpenTypeFeatureTag);
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GET(uiprivFUTURE_kCTFontOpenTypeFeatureValue, kCTFontOpenTypeFeatureValue);
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GET(uiprivFUTURE_kCTBackgroundColorAttributeName, kCTBackgroundColorAttributeName);
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dlclose(handle);
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}
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// wrappers for methods that exist in the future that we can check for with respondsToSelector:
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// keep them in one place for convenience
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// apparently only added in 10.9; we need 10.8
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void uiprivFUTURE_NSLayoutConstraint_setIdentifier(NSLayoutConstraint *constraint, NSString *identifier)
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{
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id cid = (id) constraint;
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if ([constraint respondsToSelector:@selector(setIdentifier:)])
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[cid setIdentifier:identifier];
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}
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// added in 10.11; we need 10.8
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// return whether this was done because we recreate its effects if not (see winmoveresize.m)
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BOOL uiprivFUTURE_NSWindow_performWindowDragWithEvent(NSWindow *w, NSEvent *initialEvent)
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{
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id cw = (id) w;
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if ([w respondsToSelector:@selector(performWindowDragWithEvent:)]) {
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[cw performWindowDragWithEvent:initialEvent];
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return YES;
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}
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return NO;
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}
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