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