libui/darwin/main.m

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// 20 april 2019
#import <stdlib.h>
#import "uipriv_darwin.h"
@interface uiprivApplication : NSApplication
@end
@implementation uiprivApplication
@end
@interface uiprivApplicationDelegate : NSObject<NSApplicationDelegate>
@end
static uiprivApplication *uiprivApp;
static uiprivApplicationDelegate *uiprivAppDelegate;
@implementation uiprivApplicationDelegate
#if 0
- (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)app
{
// for debugging
NSLog(@"in applicationShouldTerminate:");
if (uiprivShouldQuit()) {
canQuit = YES;
// this will call terminate:, which is the same as uiQuit()
return NSTerminateNow;
}
return NSTerminateCancel;
}
#endif
- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)app
{
return NO;
}
@end
#define errNSAppAlreadyInitialized "NSApp is not of type uiprivApplication; was likely already initialized beforehand"
static const char *initErrors[] = {
errNSAppAlreadyInitialized,
NULL,
};
const char **uiprivSysInitErrors(void)
{
return initErrors;
}
int uiprivSysInit(void *options, uiInitError *err)
{
uiprivApp = [uiprivApplication sharedApplication];
if (![NSApp isKindOfClass:[uiprivApplication class]])
return uiprivInitReturnError(err, errNSAppAlreadyInitialized);
// don't check for a NO return; something (launch services?) causes running from application bundles to always return NO when asking to change activation policy, even if the change is to the same activation policy!
// see https://github.com/andlabs/ui/issues/6
[uiprivApp setActivationPolicy:NSApplicationActivationPolicyRegular];
uiprivAppDelegate = [uiprivApplicationDelegate new];
[uiprivApp setDelegate:uiprivAppDelegate];
return 1;
}
void uiMain(void)
{
[uiprivApp run];
}
void uiQuit(void)
{
2019-04-28 12:43:55 -05:00
@autoreleasepool {
NSEvent *e;
[uiprivApp stop:uiprivApp];
// stop: won't register until another event has passed; let's synthesize one
// TODO instead of using NSApplicationDefined, create a private event type for libui internal use only
e = [NSEvent otherEventWithType:NSApplicationDefined
location:NSZeroPoint
modifierFlags:0
timestamp:[[NSProcessInfo processInfo] systemUptime]
windowNumber:0
context:[NSGraphicsContext currentContext]
subtype:0
data1:0
data2:0];
[uiprivApp postEvent:e atStart:NO]; // let pending events take priority (this is what PostQuitMessage() on Windows does so we have to do it here too for parity; thanks to mikeash in irc.freenode.net/#macdev for confirming that this parameter should indeed be NO)
}
}
// thanks to mikeash in irc.freenode.net/#macdev for suggesting the use of Grand Central Dispatch for this
void uiQueueMain(void (*f)(void *data), void *data)
{
// dispatch_get_main_queue() is a serial queue so it will not execute multiple uiQueueMain() functions concurrently
// the signature of f matches dispatch_function_t
dispatch_async_f(dispatch_get_main_queue(), data, f);
}
// Debugger() was deprecated in macOS 10.8 (as part of the larger CarbonCore deprecation), but they did not provide a replacement.
// Though some people say inline asm, I'd rather make this work automatically everywhere.
// Others say raise(SIGTRAP) and others still say __builtin_trap(), but I can't confirm these do what I want (some sources, including documentation, claim they either cause a core dump or send a SIGILL instead).
// I've also heard of some new clang intrinsics, __builtin_debugtrap(), but this is totally undocumented and the original patch for this suggested it would be identical to __builtin_trap(), so...
// Also I cannot figure out how to manually raise EXC_BREAKPOINT.
// So that leaves us with one option: just use Debugger(), turning off the deprecation warnings.
// Also, while we could turn off the deprecation warning temporarily in gcc >= 4.6 and any clang, I'm not sure what minimum version of gcc we need, and I'm not sure if "any clang" is even accurate.
// So instead of juggling version macros, just turn off deprecation warnings at the bottom of this file.
// References:
// - https://stackoverflow.com/questions/37299/xcode-equivalent-of-asm-int-3-debugbreak-halt
// - https://stackoverflow.com/questions/2622017/suppressing-deprecated-warnings-in-xcode
// - https://stackoverflow.com/questions/28166565/detect-gcc-as-opposed-to-msvc-clang-with-macro
// - https://stackoverflow.com/questions/16555585/why-pragma-gcc-diagnostic-push-pop-warning-in-gcc-c
// - possibly others, all on stackoverflow.com (and maybe once on Apple's own forums?); I forget now
static void debugBreak(void);
void uiprivReportError(const char *prefix, const char *msg, const char *suffix, bool internal)
{
NSExceptionName exceptionName;
NSLog(@"*** %s: %s. %s", prefix, msg, suffix);
exceptionName = NSInternalInconsistencyException;
if (!internal)
// TODO either find an appropriate exception for each possible message or use a custom exception name
exceptionName = NSInvalidArgumentException;
[NSException raise:exceptionName
format:@"%s: %s", prefix, msg];
debugBreak();
abort(); // we shouldn't reach here
}
#ifdef __clang__
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
#else
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
static void debugBreak(void)
{
Debugger();
}
// DO NOT ADD NEW CODE HERE. IT WILL NOT BE SUBJECT TO DEPRECATION WARNINGS.
// I am making an exception here with Debugger(); see the large comment above.