kc3-lang/SDL/src/video/cocoa/SDL_cocoamessagebox.m

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• Hash : 51c61d7c
  Author :
  Date : 2021-07-27T14:57:18
  

  Run the entire Cocoa messagebox function on the main thread. This fixes bug https://github.com/libsdl-org/SDL/issues/4420

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• src/video/cocoa/SDL_cocoamessagebox.m

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely, subject to the following restrictions:
  
    1. The origin of this software must not be misrepresented; you must not
       claim that you wrote the original software. If you use this software
       in a product, an acknowledgment in the product documentation would be
       appreciated but is not required.
    2. Altered source versions must be plainly marked as such, and must not be
       misrepresented as being the original software.
    3. This notice may not be removed or altered from any source distribution.
  */
  #include "../../SDL_internal.h"
  
  #if SDL_VIDEO_DRIVER_COCOA
  
  #include "SDL_events.h"
  #include "SDL_timer.h"
  #include "SDL_messagebox.h"
  #include "SDL_cocoavideo.h"
  
  @interface SDLMessageBoxPresenter : NSObject {
  @public
      NSInteger clicked;
      NSWindow *nswindow;
  }
  - (id) initWithParentWindow:(SDL_Window *)window;
  - (void) alertDidEnd:(NSAlert *)alert returnCode:(NSInteger)returnCode contextInfo:(void *)contextInfo;
  @end
  
  @implementation SDLMessageBoxPresenter
  - (id) initWithParentWindow:(SDL_Window *)window
  {
      self = [super init];
      if (self) {
          clicked = -1;
  
          /* Retain the NSWindow because we'll show the alert later on the main thread */
          if (window) {
              nswindow = [((SDL_WindowData *) window->driverdata)->nswindow retain];
          } else {
              nswindow = NULL;
          }
      }
  
      return self;
  }
  
  - (void)showAlert:(NSAlert*)alert
  {
      if (nswindow) {
  #ifdef MAC_OS_X_VERSION_10_9
          if ([alert respondsToSelector:@selector(beginSheetModalForWindow:completionHandler:)]) {
              [alert beginSheetModalForWindow:nswindow completionHandler:^(NSModalResponse returnCode) {
                  clicked = returnCode;
              }];
          } else
  #endif
          {
  #if MAC_OS_X_VERSION_MIN_REQUIRED < 1090
              [alert beginSheetModalForWindow:nswindow modalDelegate:self didEndSelector:@selector(alertDidEnd:returnCode:contextInfo:) contextInfo:nil];
  #endif
          }
  
          while (clicked < 0) {
              SDL_PumpEvents();
              SDL_Delay(100);
          }
  
          [nswindow release];
      } else {
          clicked = [alert runModal];
      }
  }
  
  - (void) alertDidEnd:(NSAlert *)alert returnCode:(NSInteger)returnCode contextInfo:(void *)contextInfo
  {
      clicked = returnCode;
  }
  
  @end
  
  
  static void
  Cocoa_ShowMessageBoxImpl(const SDL_MessageBoxData *messageboxdata, int *buttonid, int *returnValue)
  {
      Cocoa_RegisterApp();
  
      NSAlert* alert = [[[NSAlert alloc] init] autorelease];
  
      if (messageboxdata->flags & SDL_MESSAGEBOX_ERROR) {
          [alert setAlertStyle:NSAlertStyleCritical];
      } else if (messageboxdata->flags & SDL_MESSAGEBOX_WARNING) {
          [alert setAlertStyle:NSAlertStyleWarning];
      } else {
          [alert setAlertStyle:NSAlertStyleInformational];
      }
  
      [alert setMessageText:[NSString stringWithUTF8String:messageboxdata->title]];
      [alert setInformativeText:[NSString stringWithUTF8String:messageboxdata->message]];
  
      const SDL_MessageBoxButtonData *buttons = messageboxdata->buttons;
      int i;
      for (i = 0; i < messageboxdata->numbuttons; ++i) {
          const SDL_MessageBoxButtonData *sdlButton;
          NSButton *button;
  
          if (messageboxdata->flags & SDL_MESSAGEBOX_BUTTONS_RIGHT_TO_LEFT) {
              sdlButton = &messageboxdata->buttons[messageboxdata->numbuttons - 1 - i];
          } else {
              sdlButton = &messageboxdata->buttons[i];
          }
  
          button = [alert addButtonWithTitle:[NSString stringWithUTF8String:sdlButton->text]];
          if (sdlButton->flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) {
              [button setKeyEquivalent:@"\r"];
          } else if (sdlButton->flags & SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT) {
              [button setKeyEquivalent:@"\033"];
          } else {
              [button setKeyEquivalent:@""];
          }
      }
  
      SDLMessageBoxPresenter* presenter = [[[SDLMessageBoxPresenter alloc] initWithParentWindow:messageboxdata->window] autorelease];
  
      [presenter showAlert:alert];
  
      NSInteger clicked = presenter->clicked;
      if (clicked >= NSAlertFirstButtonReturn) {
          clicked -= NSAlertFirstButtonReturn;
          if (messageboxdata->flags & SDL_MESSAGEBOX_BUTTONS_RIGHT_TO_LEFT) {
              clicked = messageboxdata->numbuttons - 1 - clicked;
          }
          *buttonid = buttons[clicked].buttonid;
          *returnValue = 0;
      } else {
          *returnValue = SDL_SetError("Did not get a valid `clicked button' id: %ld", (long)clicked);
      }
  }
  
  /* Display a Cocoa message box */
  int
  Cocoa_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
  { @autoreleasepool
  {
      __block int returnValue = 0;
  
      if ([NSThread isMainThread]) {
          Cocoa_ShowMessageBoxImpl(messageboxdata, buttonid, &returnValue);
      } else {
          dispatch_sync(dispatch_get_main_queue(), ^{ Cocoa_ShowMessageBoxImpl(messageboxdata, buttonid, &returnValue); });
      }
      return returnValue;
  }}
  
  #endif /* SDL_VIDEO_DRIVER_COCOA */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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