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 CyteTabBarController {
  30     _transient UIViewController *transient_;
  31     _H<UIViewController> remembered_;
  32 }
  33
  34 - (NSArray *) navigationURLCollection {
  35     NSMutableArray *items([NSMutableArray array]);
  36
  37     // XXX: Should this deal with transient view controllers?
  38     for (id navigation in [self viewControllers]) {
  39         NSArray *stack = [navigation performSelector:@selector(navigationURLCollection)];
  40         if (stack != nil)
  41             [items addObject:stack];
  42     }
  43
  44     return items;
  45 }
  46
  47 - (void) addViewControllers:(id)no, ... {
  48     va_list args;
  49     va_start(args, no);
  50
  51     NSMutableArray *controllers([NSMutableArray array]);
  52
  53     for (;;) {
  54         auto title(va_arg(args, NSString *));
  55         if (title == nil)
  56             break;
  57
  58         UINavigationController *controller([[[UINavigationController alloc] init] autorelease]);
  59         [controllers addObject:controller];
  60
  61         auto legacy(va_arg(args, NSString *));
  62         auto normal(va_arg(args, NSString *));
  63         auto select(va_arg(args, NSString *));
  64
  65         if (kCFCoreFoundationVersionNumber < 800)
  66             [controller setTabBarItem:[[[UITabBarItem alloc] initWithTitle:title image:[UIImage imageNamed:legacy] tag:0] autorelease]];
  67         else
  68             [controller setTabBarItem:[[[UITabBarItem alloc] initWithTitle:title image:[UIImage imageNamed:normal] selectedImage:[UIImage imageNamed:select]] autorelease]];
  69     }
  70
  71     va_end(args);
  72
  73     [self setViewControllers:controllers];
  74 }
  75
  76 - (void) didReceiveMemoryWarning {
  77     [super didReceiveMemoryWarning];
  78
  79     // presenting a UINavigationController on 2.x does not update its transitionView
  80     // it thereby will not allow its topViewController to be unloaded by memory pressure
  81     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
  82         UIViewController *selected([self selectedViewController]);
  83         for (UINavigationController *controller in [self viewControllers])
  84             if (controller != selected)
  85                 if (UIViewController *top = [controller topViewController])
  86                     [top unloadView];
  87     }
  88 }
  89
  90 - (void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
  91     if ([self unselectedViewController])
  92         [self setUnselectedViewController:nil];
  93
  94     // presenting a UINavigationController on 2.x does not update its transitionView
  95     // if this view was unloaded, the tranitionView may currently be presenting nothing
  96     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
  97         UINavigationController *navigation((UINavigationController *) viewController);
  98         [navigation pushViewController:[[[UIViewController alloc] init] autorelease] animated:NO];
  99         [navigation popViewControllerAnimated:NO];
 100     }
 101 }
 102
 103 - (void) dismissModalViewControllerAnimated:(BOOL)animated {
 104     if ([self modalViewController] == nil && [self unselectedViewController] != nil)
 105         [self setUnselectedViewController:nil];
 106     else
 107         [super dismissModalViewControllerAnimated:YES];
 108 }
 109
 110 - (void) setUnselectedViewController:(UIViewController *)transient {
 111     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
 112         if (transient != nil) {
 113             [[[self viewControllers] objectAtIndex:0] pushViewController:transient animated:YES];
 114             [self setSelectedIndex:0];
 115         } return;
 116     }
 117
 118     NSMutableArray *controllers = [[[self viewControllers] mutableCopy] autorelease];
 119     if (transient != nil) {
 120         UINavigationController *navigation([[[UINavigationController alloc] init] autorelease]);
 121         [navigation setViewControllers:[NSArray arrayWithObject:transient]];
 122         transient = navigation;
 123
 124         if (transient_ == nil)
 125             remembered_ = [controllers objectAtIndex:0];
 126         transient_ = transient;
 127         [transient_ setTabBarItem:[remembered_ tabBarItem]];
 128         [controllers replaceObjectAtIndex:0 withObject:transient_];
 129         [self setSelectedIndex:0];
 130         [self setViewControllers:controllers];
 131         [self concealTabBarSelection];
 132     } else if (remembered_ != nil) {
 133         [remembered_ setTabBarItem:[transient_ tabBarItem]];
 134         transient_ = transient;
 135         [controllers replaceObjectAtIndex:0 withObject:remembered_];
 136         remembered_ = nil;
 137         [self setViewControllers:controllers];
 138         [self revealTabBarSelection];
 139     }
 140 }
 141
 142 - (UIViewController *) unselectedViewController {
 143     return transient_;
 144 }
 145
 146 - (void) unloadData {
 147     [super unloadData];
 148
 149     for (UINavigationController *controller in [self viewControllers])
 150         [controller unloadData];
 151
 152     if (UIViewController *selected = [self selectedViewController])
 153         [selected reloadData];
 154
 155     if (UIViewController *unselected = [self unselectedViewController]) {
 156         [unselected unloadData];
 157         [unselected reloadData];
 158     }
 159 }
 160
 161 #include "InterfaceOrientation.h"
 162
 163 @end