CyteKit/TabBarController.mm

   1 /* Cydia - iPhone UIKit Front-End for Debian APT
   2  * Copyright (C) 2008-2015  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU General Public License, Version 3 {{{ */
   6 /*
   7  * Cydia is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 3 of the License,
  10  * or (at your option) any later version.
  11  *
  12  * Cydia is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Cydia.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "CyteKit/UCPlatform.h"
  23
  24 #include "CyteKit/TabBarController.h"
  25
  26 #include "iPhonePrivate.h"
  27
  28 @implementation UITabBarController (Cydia)
  29
  30 @end
  31
  32 @implementation CyteTabBarController
  33
  34 - (void) didReceiveMemoryWarning {
  35     [super didReceiveMemoryWarning];
  36
  37     // presenting a UINavigationController on 2.x does not update its transitionView
  38     // it thereby will not allow its topViewController to be unloaded by memory pressure
  39     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
  40         UIViewController *selected([self selectedViewController]);
  41         for (UINavigationController *controller in [self viewControllers])
  42             if (controller != selected)
  43                 if (UIViewController *top = [controller topViewController])
  44                     [top unloadView];
  45     }
  46 }
  47
  48 - (void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
  49     if ([self unselectedViewController])
  50         [self setUnselectedViewController:nil];
  51
  52     // presenting a UINavigationController on 2.x does not update its transitionView
  53     // if this view was unloaded, the tranitionView may currently be presenting nothing
  54     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
  55         UINavigationController *navigation((UINavigationController *) viewController);
  56         [navigation pushViewController:[[[UIViewController alloc] init] autorelease] animated:NO];
  57         [navigation popViewControllerAnimated:NO];
  58     }
  59 }
  60
  61 - (void) dismissModalViewControllerAnimated:(BOOL)animated {
  62     if ([self modalViewController] == nil && [self unselectedViewController] != nil)
  63         [self setUnselectedViewController:nil];
  64     else
  65         [super dismissModalViewControllerAnimated:YES];
  66 }
  67
  68 - (void) setUnselectedViewController:(UIViewController *)transient {
  69     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
  70         if (transient != nil) {
  71             [[[self viewControllers] objectAtIndex:0] pushViewController:transient animated:YES];
  72             [self setSelectedIndex:0];
  73         } return;
  74     }
  75
  76     NSMutableArray *controllers = [[[self viewControllers] mutableCopy] autorelease];
  77     if (transient != nil) {
  78         UINavigationController *navigation([[[UINavigationController alloc] init] autorelease]);
  79         [navigation setViewControllers:[NSArray arrayWithObject:transient]];
  80         transient = navigation;
  81
  82         if (transient_ == nil)
  83             remembered_ = [controllers objectAtIndex:0];
  84         transient_ = transient;
  85         [transient_ setTabBarItem:[remembered_ tabBarItem]];
  86         [controllers replaceObjectAtIndex:0 withObject:transient_];
  87         [self setSelectedIndex:0];
  88         [self setViewControllers:controllers];
  89         [self concealTabBarSelection];
  90     } else if (remembered_ != nil) {
  91         [remembered_ setTabBarItem:[transient_ tabBarItem]];
  92         transient_ = transient;
  93         [controllers replaceObjectAtIndex:0 withObject:remembered_];
  94         remembered_ = nil;
  95         [self setViewControllers:controllers];
  96         [self revealTabBarSelection];
  97     }
  98 }
  99
 100 - (UIViewController *) unselectedViewController {
 101     return transient_;
 102 }
 103
 104 - (void) unloadData {
 105     [super unloadData];
 106
 107     for (UINavigationController *controller in [self viewControllers])
 108         [controller unloadData];
 109
 110     if (UIViewController *selected = [self selectedViewController])
 111         [selected reloadData];
 112
 113     if (UIViewController *unselected = [self unselectedViewController]) {
 114         [unselected unloadData];
 115         [unselected reloadData];
 116     }
 117 }
 118
 119 #include "InterfaceOrientation.h"
 120
 121 @end