Settings.mm

   1 /* WinterBoard - Theme Manager for the iPhone
   2  * Copyright (C) 2008-2014  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Lesser General Public License, Version 3 {{{ */
   6 /*
   7  * WinterBoard is free software: you can redistribute it and/or modify it under
   8  * the terms of the GNU Lesser General Public License as published by the
   9  * Free Software Foundation, either version 3 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * WinterBoard is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with WinterBoard.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #import <Foundation/Foundation.h>
  23 #import <UIKit/UIKit.h>
  24 #import <Preferences/PSRootController.h>
  25 #import <Preferences/PSViewController.h>
  26 #import <Preferences/PSListController.h>
  27 #import <Preferences/PSSpecifier.h>
  28 #import <Preferences/PSTableCell.h>
  29 #import <UIKit/UINavigationButton.h>
  30
  31 #include <dlfcn.h>
  32 #include <objc/runtime.h>
  33
  34 static void *libhide;
  35 static BOOL (*IsIconHiddenDisplayId)(NSString *);
  36 static BOOL (*HideIconViaDisplayId)(NSString *);
  37 static BOOL (*UnHideIconViaDisplayId)(NSString *);
  38
  39 static NSString *WinterBoardDisplayID = @"com.saurik.WinterBoard";
  40
  41 extern NSString *PSTableCellKey;
  42 extern "C" UIImage *_UIImageWithName(NSString *);
  43
  44 static UIImage *checkImage;
  45 static UIImage *uncheckedImage;
  46
  47 static BOOL settingsChanged;
  48 static NSMutableDictionary *_settings;
  49 static NSString *_plist;
  50
  51 void AddThemes(NSMutableArray *themesOnDisk, NSString *folder) {
  52     NSArray *themes([[NSFileManager defaultManager] contentsOfDirectoryAtPath:folder error:NULL]);
  53     for (NSString *theme in themes) {
  54         if (NSDictionary *info = [NSDictionary dictionaryWithContentsOfFile:[NSString stringWithFormat:@"%@/%@/Info.plist", folder, theme]]) {
  55             if (NSArray *version = [info objectForKey:@"CoreFoundationVersion"]) {
  56                 size_t count([version count]);
  57                 if (count == 0 || count > 2)
  58                     continue;
  59
  60                 double lower([[version objectAtIndex:0] doubleValue]);
  61                 if (kCFCoreFoundationVersionNumber < lower)
  62                     continue;
  63
  64                 if (count != 1) {
  65                     double upper([[version objectAtIndex:1] doubleValue]);
  66                     if (upper <= kCFCoreFoundationVersionNumber)
  67                         continue;
  68                 }
  69             }
  70         }
  71
  72         [themesOnDisk addObject:theme];
  73     }
  74 }
  75
  76 /* [NSObject yieldToSelector:(withObject:)] {{{*/
  77 @interface NSObject (wb$yieldToSelector)
  78 - (id) wb$yieldToSelector:(SEL)selector withObject:(id)object;
  79 - (id) wb$yieldToSelector:(SEL)selector;
  80 @end
  81
  82 @implementation NSObject (Cydia)
  83
  84 - (void) wb$doNothing {
  85 }
  86
  87 - (void) wb$_yieldToContext:(NSMutableArray *)context {
  88     NSAutoreleasePool *pool([[NSAutoreleasePool alloc] init]);
  89
  90     SEL selector(reinterpret_cast<SEL>([[context objectAtIndex:0] pointerValue]));
  91     id object([[context objectAtIndex:1] nonretainedObjectValue]);
  92     volatile bool &stopped(*reinterpret_cast<bool *>([[context objectAtIndex:2] pointerValue]));
  93
  94     /* XXX: deal with exceptions */
  95     id value([self performSelector:selector withObject:object]);
  96
  97     NSMethodSignature *signature([self methodSignatureForSelector:selector]);
  98     [context removeAllObjects];
  99     if ([signature methodReturnLength] != 0 && value != nil)
 100         [context addObject:value];
 101
 102     stopped = true;
 103
 104     [self
 105         performSelectorOnMainThread:@selector(wb$doNothing)
 106         withObject:nil
 107         waitUntilDone:NO
 108     ];
 109
 110     [pool release];
 111 }
 112
 113 - (id) wb$yieldToSelector:(SEL)selector withObject:(id)object {
 114     /*return [self performSelector:selector withObject:object];*/
 115
 116     volatile bool stopped(false);
 117
 118     NSMutableArray *context([NSMutableArray arrayWithObjects:
 119         [NSValue valueWithPointer:selector],
 120         [NSValue valueWithNonretainedObject:object],
 121         [NSValue valueWithPointer:const_cast<bool *>(&stopped)],
 122     nil]);
 123
 124     NSThread *thread([[[NSThread alloc]
 125         initWithTarget:self
 126         selector:@selector(wb$_yieldToContext:)
 127         object:context
 128     ] autorelease]);
 129
 130     [thread start];
 131
 132     NSRunLoop *loop([NSRunLoop currentRunLoop]);
 133     NSDate *future([NSDate distantFuture]);
 134
 135     while (!stopped && [loop runMode:NSDefaultRunLoopMode beforeDate:future]);
 136
 137     return [context count] == 0 ? nil : [context objectAtIndex:0];
 138 }
 139
 140 - (id) wb$yieldToSelector:(SEL)selector {
 141     return [self wb$yieldToSelector:selector withObject:nil];
 142 }
 143
 144 @end
 145 /* }}} */
 146
 147 /* Theme Settings Controller {{{ */
 148 @interface WBSThemesController: PSViewController <UITableViewDelegate, UITableViewDataSource> {
 149     UITableView *_tableView;
 150     NSMutableArray *_themes;
 151 }
 152
 153 @property (nonatomic, retain) NSMutableArray *themes;
 154
 155 - (id) initForContentSize:(CGSize)size;
 156 - (id) view;
 157 - (id) navigationTitle;
 158 - (void) themesChanged;
 159
 160 - (int) numberOfSectionsInTableView:(UITableView *)tableView;
 161 - (id) tableView:(UITableView *)tableView titleForHeaderInSection:(int)section;
 162 - (int) tableView:(UITableView *)tableView numberOfRowsInSection:(int)section;
 163 - (id) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;
 164 - (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath;
 165 - (void) tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath;
 166 - (UITableViewCellEditingStyle) tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath;
 167 - (BOOL) tableView:(UITableView *)tableView shouldIndentWhileEditingRowAtIndexPath:(NSIndexPath *)indexPath;
 168 - (BOOL) tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath;
 169
 170 @end
 171
 172 @implementation WBSThemesController
 173
 174 @synthesize themes = _themes;
 175
 176 + (void) initialize {
 177     NSAutoreleasePool *pool([[NSAutoreleasePool alloc] init]);
 178     checkImage = [_UIImageWithName(@"UIPreferencesBlueCheck.png") retain];
 179     uncheckedImage = [[UIImage imageWithContentsOfFile:@"/System/Library/PreferenceBundles/WinterBoardSettings.bundle/SearchResultsCheckmarkClear.png"] retain];
 180     [pool release];
 181 }
 182
 183 - (id) initForContentSize:(CGSize)size {
 184     if ((self = [super initForContentSize:size]) != nil) {
 185         self.themes = [_settings objectForKey:@"Themes"];
 186         if (!_themes) {
 187             if (NSString *theme = [_settings objectForKey:@"Theme"]) {
 188                 self.themes = [NSMutableArray arrayWithObject:
 189                          [NSMutableDictionary dictionaryWithObjectsAndKeys:
 190                                             theme, @"Name",
 191                                 [NSNumber numberWithBool:YES], @"Active", nil]];
 192                 [_settings removeObjectForKey:@"Theme"];
 193             }
 194             if (!_themes)
 195                 self.themes = [NSMutableArray array];
 196             [_settings setObject:_themes forKey:@"Themes"];
 197         }
 198
 199         NSMutableArray *themesOnDisk([NSMutableArray array]);
 200         AddThemes(themesOnDisk, @"/Library/Themes");
 201         AddThemes(themesOnDisk, [NSString stringWithFormat:@"%@/Library/SummerBoard/Themes", NSHomeDirectory()]);
 202
 203         for (int i = 0, count = [themesOnDisk count]; i < count; i++) {
 204             NSString *theme = [themesOnDisk objectAtIndex:i];
 205             if ([theme hasSuffix:@".theme"])
 206                 [themesOnDisk replaceObjectAtIndex:i withObject:[theme stringByDeletingPathExtension]];
 207         }
 208
 209         NSMutableSet *themesSet([NSMutableSet set]);
 210
 211         for (int i = 0, count = [_themes count]; i < count; i++) {
 212             NSDictionary *theme([_themes objectAtIndex:i]);
 213             NSString *name([theme objectForKey:@"Name"]);
 214
 215             if (!name || ![themesOnDisk containsObject:name]) {
 216                 [_themes removeObjectAtIndex:i];
 217                 i--;
 218                 count--;
 219             } else {
 220                 [themesSet addObject:name];
 221             }
 222         }
 223
 224         for (NSString *theme in themesOnDisk) {
 225             if ([themesSet containsObject:theme])
 226                 continue;
 227             [themesSet addObject:theme];
 228
 229             [_themes insertObject:[NSMutableDictionary dictionaryWithObjectsAndKeys:
 230                     theme, @"Name",
 231                     [NSNumber numberWithBool:NO], @"Active",
 232             nil] atIndex:0];
 233         }
 234
 235         _tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, 320, 480-64) style:UITableViewStyleGrouped];
 236         [_tableView setDataSource:self];
 237         [_tableView setDelegate:self];
 238         [_tableView setEditing:YES];
 239         [_tableView setAllowsSelectionDuringEditing:YES];
 240         if ([self respondsToSelector:@selector(setView:)])
 241             [self setView:_tableView];
 242     }
 243     return self;
 244 }
 245
 246 - (void) dealloc {
 247     [_tableView release];
 248     [_themes release];
 249     [super dealloc];
 250 }
 251
 252 - (id) navigationTitle {
 253     return @"Themes";
 254 }
 255
 256 - (id) view {
 257     return _tableView;
 258 }
 259
 260 - (void) themesChanged {
 261     settingsChanged = YES;
 262 }
 263
 264 /* UITableViewDelegate / UITableViewDataSource Methods {{{ */
 265 - (int) numberOfSectionsInTableView:(UITableView *)tableView {
 266     return 1;
 267 }
 268
 269 - (id) tableView:(UITableView *)tableView titleForHeaderInSection:(int)section {
 270     return nil;
 271 }
 272
 273 - (int) tableView:(UITableView *)tableView numberOfRowsInSection:(int)section {
 274     return _themes.count;
 275 }
 276
 277 - (id) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
 278     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"ThemeCell"];
 279     if (!cell) {
 280         cell = [[[UITableViewCell alloc] initWithFrame:CGRectMake(0, 0, 100, 100) reuseIdentifier:@"ThemeCell"] autorelease];
 281         //[cell setTableViewStyle:UITableViewCellStyleDefault];
 282     }
 283
 284     NSDictionary *theme([_themes objectAtIndex:indexPath.row]);
 285     cell.text = [theme objectForKey:@"Name"];
 286     cell.hidesAccessoryWhenEditing = NO;
 287     NSNumber *active([theme objectForKey:@"Active"]);
 288     BOOL inactive(active == nil || ![active boolValue]);
 289     [cell setImage:(inactive ? uncheckedImage : checkImage)];
 290     return cell;
 291 }
 292
 293 - (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
 294     UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
 295     NSMutableDictionary *theme = [_themes objectAtIndex:indexPath.row];
 296     NSNumber *active = [theme objectForKey:@"Active"];
 297     BOOL inactive = active == nil || ![active boolValue];
 298     [theme setObject:[NSNumber numberWithBool:inactive] forKey:@"Active"];
 299     [cell setImage:(!inactive ? uncheckedImage : checkImage)];
 300     [tableView deselectRowAtIndexPath:(NSIndexPath *)indexPath animated:YES];
 301     [self themesChanged];
 302 }
 303
 304 - (void) tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath {
 305     NSUInteger fromIndex = [fromIndexPath row];
 306     NSUInteger toIndex = [toIndexPath row];
 307     if (fromIndex == toIndex)
 308         return;
 309     NSMutableDictionary *theme = [[[_themes objectAtIndex:fromIndex] retain] autorelease];
 310     [_themes removeObjectAtIndex:fromIndex];
 311     [_themes insertObject:theme atIndex:toIndex];
 312     [self themesChanged];
 313 }
 314
 315 - (UITableViewCellEditingStyle) tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath {
 316     return UITableViewCellEditingStyleNone;
 317 }
 318
 319 - (BOOL) tableView:(UITableView *)tableView shouldIndentWhileEditingRowAtIndexPath:(NSIndexPath *)indexPath {
 320     return NO;
 321 }
 322
 323 - (BOOL) tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
 324     return YES;
 325 }
 326 /* }}} */
 327 @end
 328 /* }}} */
 329
 330 @interface WBAdvancedController: PSListController {
 331 }
 332
 333 - (id) specifiers;
 334 - (void) settingsChanged;
 335
 336 @end
 337
 338 @implementation WBAdvancedController
 339
 340 - (id) specifiers {
 341     if (!_specifiers)
 342         _specifiers = [[self loadSpecifiersFromPlistName:@"Advanced" target:self] retain];
 343     return _specifiers;
 344 }
 345
 346 - (void) settingsChanged {
 347     settingsChanged = YES;
 348 }
 349
 350 - (void) setPreferenceValue:(id)value specifier:(PSSpecifier *)spec {
 351     NSString *key([spec propertyForKey:@"key"]);
 352     if ([[spec propertyForKey:@"negate"] boolValue])
 353         value = [NSNumber numberWithBool:(![value boolValue])];
 354     [_settings setValue:value forKey:key];
 355     [self settingsChanged];
 356 }
 357
 358 - (id) readPreferenceValue:(PSSpecifier *)spec {
 359     NSString *key([spec propertyForKey:@"key"]);
 360     id defaultValue([spec propertyForKey:@"default"]);
 361     id plistValue([_settings objectForKey:key]);
 362     if (!plistValue)
 363         return defaultValue;
 364     if ([[spec propertyForKey:@"negate"] boolValue])
 365         plistValue = [NSNumber numberWithBool:(![plistValue boolValue])];
 366     return plistValue;
 367 }
 368
 369 - (void) __optimizeThemes {
 370     system("/usr/libexec/winterboard/Optimize");
 371 }
 372
 373 - (void) optimizeThemes {
 374     UIAlertView *alert([[[UIAlertView alloc]
 375         initWithTitle:@"Optimize Themes"
 376         message:@"Please note that this setting /replaces/ the PNG files that came with the theme. PNG files that have been iPhone-optimized cannot be viewed on a normal computer unless they are first deoptimized. You can use Cydia to reinstall themes that have been optimized in order to revert to the original PNG files."
 377         delegate:self
 378         cancelButtonTitle:@"Cancel"
 379         otherButtonTitles:@"Optimize", nil
 380     ] autorelease]);
 381
 382     [alert setContext:@"optimize"];
 383     [alert setNumberOfRows:1];
 384     [alert show];
 385 }
 386
 387 - (void) _optimizeThemes {
 388     UIView *view([self view]);
 389     UIWindow *window([view window]);
 390
 391     UIProgressHUD *hud([[[UIProgressHUD alloc] initWithWindow:window] autorelease]);
 392     [hud setText:@"Reticulating Splines\nPlease Wait (Minutes)"];
 393
 394     [window setUserInteractionEnabled:NO];
 395
 396     [window addSubview:hud];
 397     [hud show:YES];
 398     [self wb$yieldToSelector:@selector(__optimizeThemes)];
 399     [hud removeFromSuperview];
 400
 401     [window setUserInteractionEnabled:YES];
 402
 403     [self settingsChanged];
 404 }
 405
 406 - (void) alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)button {
 407     NSString *context([alert context]);
 408
 409     if ([context isEqualToString:@"optimize"]) {
 410         if (button == [alert firstOtherButtonIndex]) {
 411             [self performSelector:@selector(_optimizeThemes) withObject:nil afterDelay:0];
 412         }
 413
 414         [alert dismissWithClickedButtonIndex:-1 animated:YES];
 415     }
 416     /*else if ([super respondsToSelector:@selector(alertView:clickedButtonAtIndex:)])
 417         [super alertView:alert clickedButtonAtIndex:button];*/
 418 }
 419
 420 @end
 421
 422 @interface WBSettingsController: PSListController {
 423 }
 424
 425 - (id) initForContentSize:(CGSize)size;
 426 - (void) dealloc;
 427 - (void) suspend;
 428 - (void) navigationBarButtonClicked:(int)buttonIndex;
 429 - (void) viewWillRedisplay;
 430 - (void) pushController:(id)controller;
 431 - (id) specifiers;
 432 - (void) settingsChanged;
 433 - (NSString *) title;
 434 - (void) setPreferenceValue:(id)value specifier:(PSSpecifier *)spec;
 435 - (id) readPreferenceValue:(PSSpecifier *)spec;
 436
 437 @end
 438
 439 @implementation WBSettingsController
 440
 441 + (void) load {
 442     libhide = dlopen("/usr/lib/hide.dylib", RTLD_LAZY);
 443     IsIconHiddenDisplayId = reinterpret_cast<BOOL (*)(NSString *)>(dlsym(libhide, "IsIconHiddenDisplayId"));
 444     HideIconViaDisplayId = reinterpret_cast<BOOL (*)(NSString *)>(dlsym(libhide, "HideIconViaDisplayId"));
 445     UnHideIconViaDisplayId = reinterpret_cast<BOOL (*)(NSString *)>(dlsym(libhide, "UnHideIconViaDisplayId"));
 446 }
 447
 448 - (void) _wb$loadSettings {
 449     _plist = [[NSString stringWithFormat:@"%@/Library/Preferences/com.saurik.WinterBoard.plist", NSHomeDirectory()] retain];
 450     _settings = [NSMutableDictionary dictionaryWithContentsOfFile:_plist];
 451
 452     bool set;
 453     if (_settings != nil)
 454         set = true;
 455     else {
 456         set = false;
 457         _settings = [NSMutableDictionary dictionary];
 458     }
 459
 460     _settings = [_settings retain];
 461
 462     if ([_settings objectForKey:@"SummerBoard"] == nil)
 463         [_settings setObject:[NSNumber numberWithBool:set] forKey:@"SummerBoard"];
 464
 465     if (libhide != NULL)
 466         [_settings setObject:[NSNumber numberWithBool:IsIconHiddenDisplayId(WinterBoardDisplayID)] forKey:@"IconHidden"];
 467 }
 468
 469 - (id) initForContentSize:(CGSize)size {
 470     if ((self = [super initForContentSize:size]) != nil) {
 471         [self _wb$loadSettings];
 472     } return self;
 473 }
 474
 475 - (void) dealloc {
 476     [_settings release];
 477     [_plist release];
 478     [super dealloc];
 479 }
 480
 481 - (void) suspend {
 482     if (!settingsChanged)
 483         return;
 484
 485     NSData *data([NSPropertyListSerialization dataFromPropertyList:_settings format:NSPropertyListBinaryFormat_v1_0 errorDescription:NULL]);
 486     if (!data)
 487         return;
 488     if (![data writeToFile:_plist options:NSAtomicWrite error:NULL])
 489         return;
 490
 491     if (libhide != NULL)
 492         ([[_settings objectForKey:@"IconHidden"] boolValue] ? HideIconViaDisplayId : UnHideIconViaDisplayId)(WinterBoardDisplayID);
 493
 494     unlink("/User/Library/Caches/com.apple.springboard-imagecache-icons");
 495     unlink("/User/Library/Caches/com.apple.springboard-imagecache-icons.plist");
 496     unlink("/User/Library/Caches/com.apple.springboard-imagecache-smallicons");
 497     unlink("/User/Library/Caches/com.apple.springboard-imagecache-smallicons.plist");
 498
 499     unlink("/User/Library/Caches/com.apple.SpringBoard.folderSwitcherLinen");
 500     unlink("/User/Library/Caches/com.apple.SpringBoard.notificationCenterLinen");
 501
 502     unlink("/User/Library/Caches/com.apple.SpringBoard.folderSwitcherLinen.0");
 503     unlink("/User/Library/Caches/com.apple.SpringBoard.folderSwitcherLinen.1");
 504     unlink("/User/Library/Caches/com.apple.SpringBoard.folderSwitcherLinen.2");
 505     unlink("/User/Library/Caches/com.apple.SpringBoard.folderSwitcherLinen.3");
 506
 507     system("rm -rf /User/Library/Caches/SpringBoardIconCache");
 508     system("rm -rf /User/Library/Caches/SpringBoardIconCache-small");
 509     system("rm -rf /User/Library/Caches/com.apple.IconsCache");
 510     system("rm -rf /User/Library/Caches/com.apple.newsstand");
 511     system("rm -rf /User/Library/Caches/com.apple.springboard.sharedimagecache");
 512
 513     system("rm -rf /User/Library/Caches/BarDialer");
 514     system("rm -rf /User/Library/Caches/BarDialer_selected");
 515     system("rm -rf /User/Library/Caches/BarRecents");
 516     system("rm -rf /User/Library/Caches/BarRecents_selected");
 517     system("rm -rf /User/Library/Caches/BarVM");
 518     system("rm -rf /User/Library/Caches/BarVM_selected");
 519
 520     system("killall -9 lsd");
 521
 522     if (kCFCoreFoundationVersionNumber > 700) // XXX: iOS 6.x
 523         system("killall backboardd");
 524     else
 525         system("killall SpringBoard");
 526 }
 527
 528 - (void) cancelChanges {
 529     [_settings release];
 530     [_plist release];
 531
 532     [self _wb$loadSettings];
 533
 534     [self reloadSpecifiers];
 535     if (![[PSViewController class] instancesRespondToSelector:@selector(showLeftButton:withStyle:rightButton:withStyle:)]) {
 536         [[self navigationItem] setLeftBarButtonItem:nil];
 537         [[self navigationItem] setRightBarButtonItem:nil];
 538     } else {
 539         [self showLeftButton:nil withStyle:0 rightButton:nil withStyle:0];
 540     }
 541     settingsChanged = NO;
 542 }
 543
 544 - (void) navigationBarButtonClicked:(int)buttonIndex {
 545     if (!settingsChanged) {
 546         [super navigationBarButtonClicked:buttonIndex];
 547         return;
 548     }
 549
 550     if (buttonIndex == 0) {
 551         [self cancelChanges];
 552         return;
 553     }
 554
 555     [self suspend];
 556     [self.rootController popController];
 557 }
 558
 559 - (void) settingsConfirmButtonClicked:(UIBarButtonItem *)button {
 560     [self navigationBarButtonClicked:button.tag];
 561 }
 562
 563 - (void) viewWillRedisplay {
 564     if (settingsChanged)
 565         [self settingsChanged];
 566     [super viewWillRedisplay];
 567 }
 568
 569 - (void) viewWillAppear:(BOOL)animated {
 570     if (settingsChanged)
 571         [self settingsChanged];
 572     if ([super respondsToSelector:@selector(viewWillAppear:)])
 573         [super viewWillAppear:animated];
 574 }
 575
 576 - (void) pushController:(id)controller {
 577     [self hideNavigationBarButtons];
 578     [super pushController:controller];
 579 }
 580
 581 - (id) specifiers {
 582     if (!_specifiers) {
 583         NSMutableArray *specifiers([NSMutableArray array]);
 584         for (PSSpecifier *specifier in [self loadSpecifiersFromPlistName:@"WinterBoard" target:self]) {
 585             if (NSArray *version = [specifier propertyForKey:@"wb$filter"]) {
 586                 size_t count([version count]);
 587                 if (count == 0 || count > 2)
 588                     continue;
 589
 590                 double lower([[version objectAtIndex:0] doubleValue]);
 591                 if (kCFCoreFoundationVersionNumber < lower)
 592                     continue;
 593
 594                 if (count != 1) {
 595                     double upper([[version objectAtIndex:1] doubleValue]);
 596                     if (upper <= kCFCoreFoundationVersionNumber)
 597                         continue;
 598                 }
 599             }
 600             [specifiers addObject:specifier];
 601         }
 602         _specifiers = [specifiers retain];
 603     }
 604     return _specifiers;
 605 }
 606
 607 - (void) settingsChanged {
 608     if (![[PSViewController class] instancesRespondToSelector:@selector(showLeftButton:withStyle:rightButton:withStyle:)]) {
 609         UIBarButtonItem *respringButton([[UIBarButtonItem alloc] initWithTitle:@"Respring" style:UIBarButtonItemStyleDone target:self action:@selector(settingsConfirmButtonClicked:)]);
 610         UIBarButtonItem *cancelButton([[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStylePlain target:self action:@selector(settingsConfirmButtonClicked:)]);
 611         cancelButton.tag = 0;
 612         respringButton.tag = 1;
 613         [[self navigationItem] setLeftBarButtonItem:respringButton];
 614         [[self navigationItem] setRightBarButtonItem:cancelButton];
 615         [respringButton release];
 616         [cancelButton release];
 617     } else {
 618         [self showLeftButton:@"Respring" withStyle:2 rightButton:@"Cancel" withStyle:0];
 619     }
 620     settingsChanged = YES;
 621 }
 622
 623 - (NSString *) title {
 624     return @"WinterBoard";
 625 }
 626
 627 - (void) setPreferenceValue:(id)value specifier:(PSSpecifier *)spec {
 628     NSString *key([spec propertyForKey:@"key"]);
 629     if ([[spec propertyForKey:@"negate"] boolValue])
 630         value = [NSNumber numberWithBool:(![value boolValue])];
 631     [_settings setValue:value forKey:key];
 632     [self settingsChanged];
 633 }
 634
 635 - (id) readPreferenceValue:(PSSpecifier *)spec {
 636     NSString *key([spec propertyForKey:@"key"]);
 637     id defaultValue([spec propertyForKey:@"default"]);
 638     id plistValue([_settings objectForKey:key]);
 639     if (!plistValue)
 640         return defaultValue;
 641     if ([[spec propertyForKey:@"negate"] boolValue])
 642         plistValue = [NSNumber numberWithBool:(![plistValue boolValue])];
 643     return plistValue;
 644 }
 645
 646 @end
 647
 648 #define WBSAddMethod(_class, _sel, _imp, _type) \
 649     if (![[_class class] instancesRespondToSelector:@selector(_sel)]) \
 650         class_addMethod([_class class], @selector(_sel), (IMP)_imp, _type)
 651 void $PSRootController$popController(PSRootController *self, SEL _cmd) {
 652     [self popViewControllerAnimated:YES];
 653 }
 654
 655 void $PSViewController$hideNavigationBarButtons(PSRootController *self, SEL _cmd) {
 656 }
 657
 658 id $PSViewController$initForContentSize$(PSRootController *self, SEL _cmd, CGRect contentSize) {
 659     return [self init];
 660 }
 661
 662 static __attribute__((constructor)) void __wbsInit() {
 663     WBSAddMethod(PSRootController, popController, $PSRootController$popController, "v@:");
 664     WBSAddMethod(PSViewController, hideNavigationBarButtons, $PSViewController$hideNavigationBarButtons, "v@:");
 665     WBSAddMethod(PSViewController, initForContentSize:, $PSViewController$initForContentSize$, "@@:{ff}");
 666 }