Atlas - SDL_cocoamessagebox.m
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21#include "SDL_internal.h"
22
23#ifdef SDL_VIDEO_DRIVER_COCOA
24
25#include "SDL_cocoavideo.h"
26
27@interface SDL3MessageBoxPresenter : NSObject
28{
29  @public
30    NSInteger clicked;
31    NSWindow *nswindow;
32}
33- (id)initWithParentWindow:(SDL_Window *)window;
34@end
35
36@implementation SDL3MessageBoxPresenter
37- (id)initWithParentWindow:(SDL_Window *)window
38{
39    self = [super init];
40    if (self) {
41        clicked = -1;
42
43        // Retain the NSWindow because we'll show the alert later on the main thread
44        if (window) {
45            nswindow = ((__bridge SDL_CocoaWindowData *)window->internal).nswindow;
46        } else {
47            nswindow = nil;
48        }
49    }
50
51    return self;
52}
53
54- (void)showAlert:(NSAlert *)alert
55{
56    if (nswindow) {
57        [alert beginSheetModalForWindow:nswindow
58                      completionHandler:^(NSModalResponse returnCode) {
59                        [NSApp stopModalWithCode:returnCode];
60                      }];
61        clicked = [NSApp runModalForWindow:nswindow];
62        nswindow = nil;
63    } else {
64        clicked = [alert runModal];
65    }
66}
67@end
68
69static void Cocoa_ShowMessageBoxImpl(const SDL_MessageBoxData *messageboxdata, int *buttonID, bool *result)
70{
71    NSAlert *alert;
72    const SDL_MessageBoxButtonData *buttons = messageboxdata->buttons;
73    SDL3MessageBoxPresenter *presenter;
74    NSInteger clicked;
75    int i;
76    Cocoa_RegisterApp();
77
78    alert = [[NSAlert alloc] init];
79
80    if (messageboxdata->flags & SDL_MESSAGEBOX_ERROR) {
81        [alert setAlertStyle:NSAlertStyleCritical];
82    } else if (messageboxdata->flags & SDL_MESSAGEBOX_WARNING) {
83        [alert setAlertStyle:NSAlertStyleWarning];
84    } else {
85        [alert setAlertStyle:NSAlertStyleInformational];
86    }
87
88    [alert setMessageText:[NSString stringWithUTF8String:messageboxdata->title]];
89    [alert setInformativeText:[NSString stringWithUTF8String:messageboxdata->message]];
90
91    for (i = 0; i < messageboxdata->numbuttons; ++i) {
92        const SDL_MessageBoxButtonData *sdlButton;
93        NSButton *button;
94
95        if (messageboxdata->flags & SDL_MESSAGEBOX_BUTTONS_RIGHT_TO_LEFT) {
96            sdlButton = &messageboxdata->buttons[messageboxdata->numbuttons - 1 - i];
97        } else {
98            sdlButton = &messageboxdata->buttons[i];
99        }
100
101        button = [alert addButtonWithTitle:[NSString stringWithUTF8String:sdlButton->text]];
102        if (sdlButton->flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) {
103            [button setKeyEquivalent:@"\r"];
104        } else if (sdlButton->flags & SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT) {
105            [button setKeyEquivalent:@"\033"];
106        } else {
107            [button setKeyEquivalent:@""];
108        }
109    }
110
111    presenter = [[SDL3MessageBoxPresenter alloc] initWithParentWindow:messageboxdata->window];
112
113    [presenter showAlert:alert];
114
115    clicked = presenter->clicked;
116    if (clicked >= NSAlertFirstButtonReturn) {
117        clicked -= NSAlertFirstButtonReturn;
118        if (messageboxdata->flags & SDL_MESSAGEBOX_BUTTONS_RIGHT_TO_LEFT) {
119            clicked = messageboxdata->numbuttons - 1 - clicked;
120        }
121        *buttonID = buttons[clicked].buttonID;
122        *result = true;
123    } else {
124        *result = SDL_SetError("Did not get a valid `clicked button' id: %ld", (long)clicked);
125    }
126}
127
128// Display a Cocoa message box
129bool Cocoa_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonID)
130{
131    @autoreleasepool {
132        __block bool result = 0;
133
134        if ([NSThread isMainThread]) {
135            Cocoa_ShowMessageBoxImpl(messageboxdata, buttonID, &result);
136        } else {
137            dispatch_sync(dispatch_get_main_queue(), ^{
138              Cocoa_ShowMessageBoxImpl(messageboxdata, buttonID, &result);
139            });
140        }
141        return result;
142    }
143}
144
145#endif // SDL_VIDEO_DRIVER_COCOA
146
[FILE END]
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