Atlas - SDL_uikitmessagebox.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_UIKIT
24
25#include "SDL_uikitvideo.h"
26#include "SDL_uikitwindow.h"
27
28// Display a UIKit message box
29
30static bool s_showingMessageBox = false;
31
32bool UIKit_ShowingMessageBox(void)
33{
34    return s_showingMessageBox;
35}
36
37static void UIKit_WaitUntilMessageBoxClosed(const SDL_MessageBoxData *messageboxdata, int *clickedindex)
38{
39    *clickedindex = messageboxdata->numbuttons;
40
41    @autoreleasepool {
42        // Run the main event loop until the alert has finished
43        // Note that this needs to be done on the main thread
44        s_showingMessageBox = true;
45        while ((*clickedindex) == messageboxdata->numbuttons) {
46            [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
47        }
48        s_showingMessageBox = false;
49    }
50}
51
52static BOOL UIKit_ShowMessageBoxAlertController(const SDL_MessageBoxData *messageboxdata, int *buttonID)
53{
54    int i;
55    int __block clickedindex = messageboxdata->numbuttons;
56    UIWindow *window = nil;
57    UIWindow *alertwindow = nil;
58
59    if (![UIAlertController class]) {
60        return NO;
61    }
62
63    UIAlertController *alert;
64    alert = [UIAlertController alertControllerWithTitle:@(messageboxdata->title)
65                                                message:@(messageboxdata->message)
66                                         preferredStyle:UIAlertControllerStyleAlert];
67
68    for (i = 0; i < messageboxdata->numbuttons; i++) {
69        UIAlertAction *action;
70        UIAlertActionStyle style = UIAlertActionStyleDefault;
71        const SDL_MessageBoxButtonData *sdlButton;
72
73        if (messageboxdata->flags & SDL_MESSAGEBOX_BUTTONS_RIGHT_TO_LEFT) {
74            sdlButton = &messageboxdata->buttons[messageboxdata->numbuttons - 1 - i];
75        } else {
76            sdlButton = &messageboxdata->buttons[i];
77        }
78
79        if (sdlButton->flags & SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT) {
80            style = UIAlertActionStyleCancel;
81        }
82
83        action = [UIAlertAction actionWithTitle:@(sdlButton->text)
84                                          style:style
85                                        handler:^(UIAlertAction *alertAction) {
86                                          clickedindex = (int)(sdlButton - messageboxdata->buttons);
87                                        }];
88        [alert addAction:action];
89
90        if (sdlButton->flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) {
91            alert.preferredAction = action;
92        }
93    }
94
95    if (messageboxdata->window) {
96        SDL_UIKitWindowData *data = (__bridge SDL_UIKitWindowData *)messageboxdata->window->internal;
97        window = data.uiwindow;
98    }
99
100    if (window == nil || window.rootViewController == nil) {
101        if (@available(iOS 13.0, tvOS 13.0, *)) {
102            UIWindowScene *scene = UIKit_GetActiveWindowScene();
103            if (scene) {
104                alertwindow = [[UIWindow alloc] initWithWindowScene:scene];
105            }
106        }
107        if (!alertwindow) {
108#ifdef SDL_PLATFORM_VISIONOS
109            alertwindow = [[UIWindow alloc] init];
110#else
111            alertwindow = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
112#endif
113        }
114        alertwindow.rootViewController = [UIViewController new];
115        alertwindow.windowLevel = UIWindowLevelAlert;
116
117        window = alertwindow;
118
119        [alertwindow makeKeyAndVisible];
120    }
121
122    [window.rootViewController presentViewController:alert animated:YES completion:nil];
123    UIKit_WaitUntilMessageBoxClosed(messageboxdata, &clickedindex);
124
125    if (alertwindow) {
126        alertwindow.hidden = YES;
127    }
128
129    UIKit_ForceUpdateHomeIndicator();
130
131    *buttonID = messageboxdata->buttons[clickedindex].buttonID;
132    return YES;
133}
134
135typedef struct UIKit_ShowMessageBoxData
136{
137    const SDL_MessageBoxData *messageboxdata;
138    int *buttonID;
139    bool result;
140} UIKit_ShowMessageBoxData;
141
142static void SDLCALL UIKit_ShowMessageBoxMainThreadCallback(void *userdata)
143{
144    @autoreleasepool {
145        UIKit_ShowMessageBoxData *data = (UIKit_ShowMessageBoxData *) userdata;
146        data->result = UIKit_ShowMessageBoxAlertController(data->messageboxdata, data->buttonID);
147    }
148}
149
150bool UIKit_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonID)
151{
152    UIKit_ShowMessageBoxData data = { messageboxdata, buttonID, false };
153    if (!SDL_RunOnMainThread(UIKit_ShowMessageBoxMainThreadCallback, &data, true)) {
154        return false;
155    } else if (!data.result) {
156        return SDL_SetError("Could not show message box.");
157    }
158    return true;
159}
160
161#endif // SDL_VIDEO_DRIVER_UIKIT
162
[FILE END]
(C) 2025 0x4248
(C) 2025 4248 Media and 4248 Systems, All part of 0x4248
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