1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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#if SDL_VIDEO_DRIVER_UIKIT
24
25#include "SDL.h"
26#include "SDL_uikitvideo.h"
27#include "SDL_uikitwindow.h"
28
29/* Display a UIKit message box */
30
31static SDL_bool s_showingMessageBox = SDL_FALSE;
32
33SDL_bool
34UIKit_ShowingMessageBox(void)
35{
36    return s_showingMessageBox;
37}
38
39static void
40UIKit_WaitUntilMessageBoxClosed(const SDL_MessageBoxData *messageboxdata, int *clickedindex)
41{
42    *clickedindex = messageboxdata->numbuttons;
43
44    @autoreleasepool {
45        /* Run the main event loop until the alert has finished */
46        /* Note that this needs to be done on the main thread */
47        s_showingMessageBox = SDL_TRUE;
48        while ((*clickedindex) == messageboxdata->numbuttons) {
49            [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
50        }
51        s_showingMessageBox = SDL_FALSE;
52    }
53}
54
55static BOOL
56UIKit_ShowMessageBoxAlertController(const SDL_MessageBoxData *messageboxdata, int *buttonid)
57{
58    int i;
59    int __block clickedindex = messageboxdata->numbuttons;
60    UIWindow *window = nil;
61    UIWindow *alertwindow = nil;
62
63    if (![UIAlertController class]) {
64        return NO;
65    }
66
67    UIAlertController *alert;
68    alert = [UIAlertController alertControllerWithTitle:@(messageboxdata->title)
69                                                message:@(messageboxdata->message)
70                                         preferredStyle:UIAlertControllerStyleAlert];
71
72    for (i = 0; i < messageboxdata->numbuttons; i++) {
73        UIAlertAction *action;
74        UIAlertActionStyle style = UIAlertActionStyleDefault;
75        const SDL_MessageBoxButtonData *sdlButton;
76
77        if (messageboxdata->flags & SDL_MESSAGEBOX_BUTTONS_RIGHT_TO_LEFT) {
78            sdlButton = &messageboxdata->buttons[messageboxdata->numbuttons - 1 - i];
79        } else {
80            sdlButton = &messageboxdata->buttons[i];
81        }
82
83        if (sdlButton->flags & SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT) {
84            style = UIAlertActionStyleCancel;
85        }
86
87        action = [UIAlertAction actionWithTitle:@(sdlButton->text)
88                                          style:style
89                                        handler:^(UIAlertAction *action) {
90				                            clickedindex = (int)(sdlButton - messageboxdata->buttons);
91                                        }];
92        [alert addAction:action];
93
94        if (sdlButton->flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) {
95            alert.preferredAction = action;
96        }
97    }
98
99    if (messageboxdata->window) {
100        SDL_WindowData *data = (__bridge SDL_WindowData *) messageboxdata->window->driverdata;
101        window = data.uiwindow;
102    }
103
104    if (window == nil || window.rootViewController == nil) {
105        alertwindow = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
106        alertwindow.rootViewController = [UIViewController new];
107        alertwindow.windowLevel = UIWindowLevelAlert;
108
109        window = alertwindow;
110
111        [alertwindow makeKeyAndVisible];
112    }
113
114    [window.rootViewController presentViewController:alert animated:YES completion:nil];
115    UIKit_WaitUntilMessageBoxClosed(messageboxdata, &clickedindex);
116
117    if (alertwindow) {
118        alertwindow.hidden = YES;
119    }
120
121    UIKit_ForceUpdateHomeIndicator();
122
123    *buttonid = messageboxdata->buttons[clickedindex].buttonid;
124    return YES;
125}
126
127/* UIAlertView is deprecated in iOS 8+ in favor of UIAlertController. */
128#if __IPHONE_OS_VERSION_MIN_REQUIRED < 80000
129@interface SDLAlertViewDelegate : NSObject <UIAlertViewDelegate>
130
131@property (nonatomic, assign) int *clickedIndex;
132
133@end
134
135@implementation SDLAlertViewDelegate
136
137- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
138{
139    if (_clickedIndex != NULL) {
140        *_clickedIndex = (int) buttonIndex;
141    }
142}
143
144@end
145#endif /* __IPHONE_OS_VERSION_MIN_REQUIRED < 80000 */
146
147static BOOL
148UIKit_ShowMessageBoxAlertView(const SDL_MessageBoxData *messageboxdata, int *buttonid)
149{
150    /* UIAlertView is deprecated in iOS 8+ in favor of UIAlertController. */
151#if __IPHONE_OS_VERSION_MIN_REQUIRED < 80000
152    int i;
153    int clickedindex = messageboxdata->numbuttons;
154    UIAlertView *alert = [[UIAlertView alloc] init];
155    SDLAlertViewDelegate *delegate = [[SDLAlertViewDelegate alloc] init];
156
157    alert.delegate = delegate;
158    alert.title = @(messageboxdata->title);
159    alert.message = @(messageboxdata->message);
160
161    for (i = 0; i < messageboxdata->numbuttons; i++) {
162        const SDL_MessageBoxButtonData *sdlButton;
163        if (messageboxdata->flags & SDL_MESSAGEBOX_BUTTONS_RIGHT_TO_LEFT) {
164            sdlButton = &messageboxdata->buttons[messageboxdata->numbuttons - 1 - i];
165        } else {
166            sdlButton = &messageboxdata->buttons[i];
167        }
168        [alert addButtonWithTitle:@(sdlButton->text)];
169    }
170
171    delegate.clickedIndex = &clickedindex;
172
173    [alert show];
174
175    UIKit_WaitUntilMessageBoxClosed(messageboxdata, &clickedindex);
176
177    alert.delegate = nil;
178
179	if (messageboxdata->flags & SDL_MESSAGEBOX_BUTTONS_RIGHT_TO_LEFT) {
180		clickedindex = messageboxdata->numbuttons - 1 - clickedindex;
181	}
182    *buttonid = messageboxdata->buttons[clickedindex].buttonid;
183    return YES;
184#else
185    return NO;
186#endif /* __IPHONE_OS_VERSION_MIN_REQUIRED < 80000 */
187}
188
189int
190UIKit_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
191{
192    BOOL success = NO;
193
194    @autoreleasepool {
195        success = UIKit_ShowMessageBoxAlertController(messageboxdata, buttonid);
196        if (!success) {
197            success = UIKit_ShowMessageBoxAlertView(messageboxdata, buttonid);
198        }
199    }
200
201    if (!success) {
202        return SDL_SetError("Could not show message box.");
203    }
204
205    return 0;
206}
207
208#endif /* SDL_VIDEO_DRIVER_UIKIT */
209
210/* vi: set ts=4 sw=4 expandtab: */
211