X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0728199b911be9095406cf05059a5a180e707778..1680c3561bc4f44c63a026e0d1a5324a39336156:/src/cocoa/app.mm diff --git a/src/cocoa/app.mm b/src/cocoa/app.mm index 0ac5bca28e..c353fec89a 100644 --- a/src/cocoa/app.mm +++ b/src/cocoa/app.mm @@ -7,7 +7,7 @@ // RCS-ID: $Id$ // Copyright: (c) David Elliott // Software 2000 Ltd. -// Licence: wxWidgets licence +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #include "wx/wxprec.h" @@ -15,7 +15,6 @@ #include "wx/app.h" #ifndef WX_PRECOMP - #include "wx/dc.h" #include "wx/intl.h" #include "wx/log.h" #include "wx/module.h" @@ -26,6 +25,8 @@ #include "wx/cocoa/mbarman.h" #include "wx/cocoa/NSApplication.h" +#include "wx/cocoa/dc.h" + #import #import #import @@ -115,7 +116,7 @@ bool wxApp::Initialize(int& argc, wxChar **argv) // application (otherwise applications would need to handle it) if ( argc > 1 ) { - static const wxChar *ARG_PSN = _T("-psn_"); + static const wxChar *ARG_PSN = wxT("-psn_"); if ( wxStrncmp(argv[1], ARG_PSN, wxStrlen(ARG_PSN)) == 0 ) { // remove this argument @@ -124,6 +125,37 @@ bool wxApp::Initialize(int& argc, wxChar **argv) } } + /* + Cocoa supports -Key value options which set the user defaults key "Key" + to the value "value" Some of them are very handy for debugging like + -NSShowAllViews YES. Cocoa picks these up from the real argv so + our removal of them from the wx copy of it does not affect Cocoa's + ability to see them. + + We basically just assume that any "-NS" option and its following + argument needs to be removed from argv. We hope that user code does + not expect to see -NS options and indeed it's probably a safe bet + since most user code accepting options is probably using the + double-dash GNU-style syntax. + */ + for(int i=1; i < argc; ++i) + { + static const wxChar *ARG_NS = wxT("-NS"); + static const int ARG_NS_LEN = wxStrlen(ARG_NS); + if( wxStrncmp(argv[i], ARG_NS, ARG_NS_LEN) == 0 ) + { + // Only eat this option if it has an argument + if( (i + 1) < argc ) + { + argc -= 2; + memmove(argv + i, argv + i + 2, argc * sizeof(wxChar*)); + // drop back one position so the next run through the loop + // reprocesses the argument at our current index. + --i; + } + } + } + return wxAppBase::Initialize(argc, argv); } @@ -131,7 +163,7 @@ void wxApp::CleanUp() { wxAutoNSAutoreleasePool pool; - wxDC::CocoaShutdownTextSystem(); + wxCocoaDCImpl::CocoaShutdownTextSystem(); wxMenuBarManager::DestroyInstance(); [[NSNotificationCenter defaultCenter] removeObserver:sg_cocoaAppObserver]; @@ -152,12 +184,10 @@ wxApp::wxApp() { m_topWindow = NULL; -#ifdef __WXDEBUG__ - m_isInAssert = false; -#endif // __WXDEBUG__ - argc = 0; +#if !wxUSE_UNICODE argv = NULL; +#endif m_cocoaApp = NULL; m_cocoaAppDelegate = NULL; } @@ -224,7 +254,7 @@ bool wxApp::OnInitGui() if(!sm_isEmbedded) wxMenuBarManager::CreateInstance(); - wxDC::CocoaInitializeTextSystem(); + wxCocoaDCImpl::CocoaInitializeTextSystem(); return true; } @@ -260,56 +290,37 @@ void wxApp::Exit() wxAppConsole::Exit(); } -// Yield to other processes -bool wxApp::Yield(bool onlyIfNeeded) -{ - // MT-FIXME - static bool s_inYield = false; - -#if wxUSE_LOG - // disable log flushing from here because a call to wxYield() shouldn't - // normally result in message boxes popping up &c - wxLog::Suspend(); -#endif // wxUSE_LOG - - if (s_inYield) - { - if ( !onlyIfNeeded ) - { - wxFAIL_MSG( wxT("wxYield called recursively" ) ); - } - - return false; - } - - s_inYield = true; - - // Run the event loop until it is out of events - while(1) - { - wxAutoNSAutoreleasePool pool; - NSEvent *event = [GetNSApplication() - nextEventMatchingMask:NSAnyEventMask - untilDate:[NSDate distantPast] - inMode:NSDefaultRunLoopMode - dequeue: YES]; - if(!event) - break; - [GetNSApplication() sendEvent: event]; - } - -#if wxUSE_LOG - // let the logs be flashed again - wxLog::Resume(); -#endif // wxUSE_LOG - - s_inYield = false; - - return true; -} - void wxApp::WakeUpIdle() { + /* When called from the main thread the NSAutoreleasePool managed by + the [NSApplication run] method would ordinarily be in place and so + one would think a pool here would be unnecessary. + + However, when called from a different thread there is usually no + NSAutoreleasePool in place because wxThread has no knowledge of + wxCocoa. The pool here is generally only ever going to contain + the NSEvent we create with the factory method. As soon as we add + it to the main event queue with postEvent:atStart: it is retained + and so safe for our pool to release. + */ + wxAutoNSAutoreleasePool pool; + /* NOTE: This is a little heavy handed. What this does is cause an + AppKit NSEvent to be added to NSApplication's queue (which is always + on the main thread). This will cause the main thread runloop to + exit which returns control to nextEventMatchingMask which returns + the event which is then sent with sendEvent: and essentially dropped + since it's not for a window (windowNumber 0) and NSApplication + certainly doesn't understand it. + + With the exception of wxEventLoop::Exit which uses us to cause the + runloop to exit and return to the NSApplication event loop, most + callers only need wx idle to happen, or more specifically only really + need to ensure that ProcessPendingEvents is called which is currently + done without exiting the runloop. + + Be careful if you decide to change the implementation of this method + as wxEventLoop::Exit depends on the current behaviour. + */ [m_cocoaApp postEvent:[NSEvent otherEventWithType:NSApplicationDefined location:NSZeroPoint modifierFlags:NSAnyEventMask timestamp:0 windowNumber:0 context:nil @@ -326,6 +337,39 @@ extern "C" static void ObserveMainRunLoopBeforeWaiting(CFRunLoopObserverRef obse static int sg_cApplicationWillUpdate = 0; #endif +/*! + Invoked from the applicationWillUpdate notification observer. See the + NSApplication documentation for the official statement on when this + will be called. Since it can be hard to understand for a Cocoa newbie + I'll try to explain it here as it relates to wxCocoa. + + Basically, we get called from within nextEventMatchingMask if and only + if any user code told the application to send the update notification + (sort of like a request for idle events). However, unlike wx idle events, + this notification is sent quite often, nearly every time through the loop + because nearly every control tells the application to send it. + + Because wx idle events are only supposed to be sent when the event loop + is about to block we instead schedule a function to be called just + before the run loop waits and send the idle events from there. + + It also has the desirable effect of only sending the wx idle events when + the event loop is actually going to block. If the event loop is being + pumped manualy (e.g. like a PeekMessage) then the kCFRunLoopBeforeWaiting + observer never fires. Our Yield() method depends on this because sending + idle events from within Yield would be bad. + + Normally you might think that we could just set the observer up once and + leave it attached. However, this is problematic because our run loop + observer calls user code (the idle handlers) which can actually display + modal dialogs. Displaying a modal dialog causes reentry of the event + loop, usually in a different run loop mode than the main loop (e.g. in + modal-dialog mode instead of default mode). Because we only register the + observer with the run loop mode at the time of this call, it won't be + called from a modal loop. + + We want it to be called and thus we need a new observer. + */ void wxApp::CocoaDelegate_applicationWillUpdate() { wxLogTrace(wxTRACE_COCOA,wxT("applicationWillUpdate")); @@ -334,6 +378,9 @@ void wxApp::CocoaDelegate_applicationWillUpdate() CFRunLoopRef cfRunLoop = CFRunLoopGetCurrent(); wxCFRef cfRunLoopMode(CFRunLoopCopyCurrentMode(cfRunLoop)); + /* If we have an observer and that observer is for the wrong run loop + mode then invalidate it and release it. + */ if(m_cfRunLoopIdleObserver != NULL && m_cfObservedRunLoopMode != cfRunLoopMode) { CFRunLoopObserverInvalidate(m_cfRunLoopIdleObserver); @@ -342,6 +389,9 @@ void wxApp::CocoaDelegate_applicationWillUpdate() #if 0 ++sg_cApplicationWillUpdate; #endif + /* This will be true either on the first call or when the above code has + invalidated and released the exisiting observer. + */ if(m_cfRunLoopIdleObserver == NULL) { // Enable idle event handling @@ -352,6 +402,13 @@ void wxApp::CocoaDelegate_applicationWillUpdate() , NULL , NULL }; + /* NOTE: I can't recall why we don't just let the observer repeat + instead of invalidating itself each time it fires thus requiring + it to be recreated for each shot but there was if I remember + some good (but very obscure) reason for it. + + On the other hand, I could be wrong so don't take that as gospel. + */ m_cfRunLoopIdleObserver.reset(CFRunLoopObserverCreate(kCFAllocatorDefault, kCFRunLoopBeforeWaiting, /*repeats*/FALSE, /*priority*/0, ObserveMainRunLoopBeforeWaiting, &observerContext)); m_cfObservedRunLoopMode = cfRunLoopMode; CFRunLoopAddObserver(cfRunLoop, m_cfRunLoopIdleObserver, m_cfObservedRunLoopMode); @@ -369,9 +426,24 @@ static inline bool FakeNeedMoreIdle() #endif } +/*! + Called by CFRunLoop just before waiting. This is the appropriate time to + send idle events. Unlike other ports, we don't peek the queue for events + and stop idling if there is one. Instead, if the user requests more idle + events we tell Cocoa to send us an applicationWillUpdate notification + which will cause our observer of that notification to tell CFRunLoop to + call us before waiting which will cause us to be fired again but only + after exhausting the event queue. + + The reason we do it this way is that peeking for an event causes CFRunLoop + to reenter and fire off its timers, observers, and sources which we're + better off avoiding. Doing it this way, we basically let CFRunLoop do the + work of peeking for the next event which is much nicer. + */ void wxApp::CF_ObserveMainRunLoopBeforeWaiting(CFRunLoopObserverRef observer, int activity) { - // Ensure that the app knows we've been invalidated + // Ensure that CocoaDelegate_applicationWillUpdate will recreate us. + // We've already been invalidated by CFRunLoop because we are one-shot. m_cfRunLoopIdleObserver.reset(); #if 0 wxLogTrace(wxTRACE_COCOA,wxT("Idle BEGIN (%d)"), sg_cApplicationWillUpdate); @@ -390,11 +462,51 @@ void wxApp::CF_ObserveMainRunLoopBeforeWaiting(CFRunLoopObserverRef observer, in } } -#ifdef __WXDEBUG__ -void wxApp::OnAssert(const wxChar *file, int line, const wxChar* cond, const wxChar *msg) -{ - m_isInAssert = true; - wxAppBase::OnAssert(file, line, cond, msg); - m_isInAssert = false; -} -#endif // __WXDEBUG__ +/* A note about Cocoa's event loops vs. run loops: + + It's important to understand that Cocoa has a two-level event loop. The + outer level is run by NSApplication and can only ever happen on the main + thread. The nextEventMatchingMask:untilDate:inMode:dequeue: method returns + the next event which is then given to sendEvent: to send it. These + methods are defined in NSApplication and are thus part of AppKit. + + Events (NSEvent) are only sent due to actual user actions like clicking + the mouse or moving the mouse or pressing a key and so on. There are no + paint events; there are no timer events; there are no socket events; there + are no idle events. + + All of those types of "events" have nothing to do with the GUI at all. + That is why Cocoa's AppKit doesn't implement them. Instead, they are + implemented in Foundation's NSRunLoop which on OS X uses CFRunLoop + to do the actual work. + + How NSApplication uses NSRunLoop is rather interesting. Basically, it + interacts with NSRunLoop only from within the nextEventMatchingMask + method. It passes its inMode: argument almost directly to NSRunLoop + and thus CFRunLoop. The run loop then runs (e.g. loops) until it + is told to exit. The run loop calls the callout functions directly. + From within those callout functions the run loop is considered to + be running. Presumably, the AppKit installs a run loop source to + receive messages from the window server over the mach port (like a + socket). For some messages (e.g. need to paint) the AppKit will + call application code like drawRect: without exiting the run loop. + For other messages (ones that can be encapsulated in an NSEvent) + the AppKit tells the run loop to exit which returns control to + the nextEventMatchingMask method which then returns the NSEvent + object. It's important to note that once the runloop has exited + it is no longer considered running and thus if you ask it which + mode it is running in it will return nil. + + When manually pumping the event loop care should be taken to + tell it to run in the correct mode. For instance, if you are + using it to run a modal dialog then you want to run it in + the modal panel run loop mode. AppKit presumably has sources + or timers or observers that specifically don't listen on this + mode. Another interesting mode is the connection reply mode. + This allows Cocoa to wait for a response from a distributed + objects message without firing off user code that may result + in a DO call being made thus recursing. So basically, the + mode is a way for Cocoa to attempt to avoid run loop recursion + but to allow it under certain circumstances. + */ +