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 #include <Menes/ObjectHandle.h>
  28
  29 @implementation UITabBarController (Cydia)
  30
  31 @end
  32
  33 @implementation CyteTabBarController {
  34     _transient UIViewController *transient_;
  35     _H<UIViewController> remembered_;
  36 }
  37
  38 - (NSArray *) navigationURLCollection {
  39     NSMutableArray *items([NSMutableArray array]);
  40
  41     // XXX: Should this deal with transient view controllers?
  42     for (id navigation in [self viewControllers]) {
  43         NSArray *stack = [navigation performSelector:@selector(navigationURLCollection)];
  44         if (stack != nil)
  45             [items addObject:stack];
  46     }
  47
  48     return items;
  49 }
  50
  51 - (void) didReceiveMemoryWarning {
  52     [super didReceiveMemoryWarning];
  53
  54     // presenting a UINavigationController on 2.x does not update its transitionView
  55     // it thereby will not allow its topViewController to be unloaded by memory pressure
  56     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
  57         UIViewController *selected([self selectedViewController]);
  58         for (UINavigationController *controller in [self viewControllers])
  59             if (controller != selected)
  60                 if (UIViewController *top = [controller topViewController])
  61                     [top unloadView];
  62     }
  63 }
  64
  65 - (void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
  66     if ([self unselectedViewController])
  67         [self setUnselectedViewController:nil];
  68
  69     // presenting a UINavigationController on 2.x does not update its transitionView
  70     // if this view was unloaded, the tranitionView may currently be presenting nothing
  71     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
  72         UINavigationController *navigation((UINavigationController *) viewController);
  73         [navigation pushViewController:[[[UIViewController alloc] init] autorelease] animated:NO];
  74         [navigation popViewControllerAnimated:NO];
  75     }
  76 }
  77
  78 - (void) dismissModalViewControllerAnimated:(BOOL)animated {
  79     if ([self modalViewController] == nil && [self unselectedViewController] != nil)
  80         [self setUnselectedViewController:nil];
  81     else
  82         [super dismissModalViewControllerAnimated:YES];
  83 }
  84
  85 - (void) setUnselectedViewController:(UIViewController *)transient {
  86     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
  87         if (transient != nil) {
  88             [[[self viewControllers] objectAtIndex:0] pushViewController:transient animated:YES];
  89             [self setSelectedIndex:0];
  90         } return;
  91     }
  92
  93     NSMutableArray *controllers = [[[self viewControllers] mutableCopy] autorelease];
  94     if (transient != nil) {
  95         UINavigationController *navigation([[[UINavigationController alloc] init] autorelease]);
  96         [navigation setViewControllers:[NSArray arrayWithObject:transient]];
  97         transient = navigation;
  98
  99         if (transient_ == nil)
 100             remembered_ = [controllers objectAtIndex:0];
 101         transient_ = transient;
 102         [transient_ setTabBarItem:[remembered_ tabBarItem]];
 103         [controllers replaceObjectAtIndex:0 withObject:transient_];
 104         [self setSelectedIndex:0];
 105         [self setViewControllers:controllers];
 106         [self concealTabBarSelection];
 107     } else if (remembered_ != nil) {
 108         [remembered_ setTabBarItem:[transient_ tabBarItem]];
 109         transient_ = transient;
 110         [controllers replaceObjectAtIndex:0 withObject:remembered_];
 111         remembered_ = nil;
 112         [self setViewControllers:controllers];
 113         [self revealTabBarSelection];
 114     }
 115 }
 116
 117 - (UIViewController *) unselectedViewController {
 118     return transient_;
 119 }
 120
 121 - (void) unloadData {
 122     [super unloadData];
 123
 124     for (UINavigationController *controller in [self viewControllers])
 125         [controller unloadData];
 126
 127     if (UIViewController *selected = [self selectedViewController])
 128         [selected reloadData];
 129
 130     if (UIViewController *unselected = [self unselectedViewController]) {
 131         [unselected unloadData];
 132         [unselected reloadData];
 133     }
 134 }
 135
 136 #include "InterfaceOrientation.h"
 137
 138 @end