// DMLocalizedNib.m // // Created by Rowan Beentje on July 4, 2010 // Copyright © 2010 Rowan Beentje. All rights reserved except as below: // This code is provided as-is, with no warranties or anything. You may use it in your projects as you wish, but you must leave this comment block (credits and copyright) intact. That's the only restriction -- Rowan Beentje otherwise grants you a fully-paid, worldwide, transferrable license to use this code as you see fit, including but not limited to making derivative works. #import <Cocoa/Cocoa.h> #import <objc/runtime.h> @interface NSNib (DMLocalizedNib) - (id)deliciousInitWithNibNamed:(NSString *)nibName bundle:(NSBundle *)bundle; - (id)deliciousInitWithContentsOfURL:(NSURL *)nibFileURL; - (BOOL)deliciousInstantiateNibWithOwner:(id)owner topLevelObjects:(NSArray **)topLevelObjects; - (void)setDeliciousNibName:(NSString *)nibName; - (NSString *)deliciousNibName; - (void)deliciousDealloc; @end static NSMutableDictionary *deliciousNibNames = nil; @implementation NSNib (DMLocalizedNib) #pragma mark NSObject /** * On NSNib class load, swizzle in our overrides of the basic methods. */ + (void)load; { NSAutoreleasePool *autoreleasePool = [[NSAutoreleasePool alloc] init]; if (self == [NSNib class]) { method_exchangeImplementations(class_getInstanceMethod(self, @selector(initWithNibNamed:bundle:)), class_getInstanceMethod(self, @selector(deliciousInitWithNibNamed:bundle:))); method_exchangeImplementations(class_getInstanceMethod(self, @selector(initWithContentsOfURL:)), class_getInstanceMethod(self, @selector(deliciousInitWithContentsOfURL:))); method_exchangeImplementations(class_getInstanceMethod(self, @selector(instantiateNibWithOwner:topLevelObjects:)), class_getInstanceMethod(self, @selector(deliciousInstantiateNibWithOwner:topLevelObjects:))); method_exchangeImplementations(class_getInstanceMethod(self, @selector(dealloc)), class_getInstanceMethod(self, @selector(deliciousDealloc))); } [autoreleasePool release]; } #pragma mark API /** * An init method swizzled with the original method, storing the base * name passed into the init method for later reuse. */ - (id)deliciousInitWithNibNamed:(NSString *)nibName bundle:(NSBundle *)bundle { // Instantiate the nib using the original (swizzled) call id nib = [self deliciousInitWithNibNamed:nibName bundle:bundle]; if (nib) { [self setDeliciousNibName:nibName]; } return nib; } /** * An init method swizzled with the original method, extracting and * storing the base name of the nib for later reuse. */ - (id)deliciousInitWithContentsOfURL:(NSURL *)nibFileURL { // Instantiate the nib using the original (swizzled) call id nib = [self deliciousInitWithContentsOfURL:nibFileURL]; if (nib) { // Extract the filename from the URL NSArray *urlParts = [[nibFileURL path] componentsSeparatedByString:@"/"]; NSString *nibName = [urlParts lastObject]; [self setDeliciousNibName:nibName]; } return nib; } /** * An instatiation method swizzled with the original method. Instantiates * as before, and then if it can find a .strings file in a preferred language * to localize the instantiated objects with, does so. */ - (BOOL)deliciousInstantiateNibWithOwner:(id)owner topLevelObjects:(NSArray **)topLevelObjects { if ([self deliciousInstantiateNibWithOwner:owner topLevelObjects:topLevelObjects]) { // Look for a localised strings table file based on the original nib name, // translating only if one was found and it wasn't English NSString *localizedStringsTablePath = [[NSBundle mainBundle] pathForResource:[self deliciousNibName] ofType:@"strings"]; if (localizedStringsTablePath && ![[[localizedStringsTablePath stringByDeletingLastPathComponent] lastPathComponent] isEqualToString:@"English.lproj"]) { [NSBundle _localizeStringsInObject:*topLevelObjects table:[self deliciousNibName]]; } return YES; } return NO; } /** * Store the nib name that was used when setting up the nib, which will * also be used to look up the .strings file name */ - (void)setDeliciousNibName:(NSString *)nibName { if (!deliciousNibNames) { deliciousNibNames = [[NSMutableDictionary alloc] init]; } [deliciousNibNames setObject:nibName forKey:[NSValue valueWithPointer:self]]; } /** * Retrieve the nib name to look up the matching .strings file name */ - (NSString *)deliciousNibName { return [deliciousNibNames objectForKey:[NSValue valueWithPointer:self]]; } /** * Swizzled deallocate to release custom stores. */ - (void)deliciousDealloc { if (deliciousNibNames) { [deliciousNibNames removeObjectForKey:[NSValue valueWithPointer:self]]; if (![deliciousNibNames count]) [deliciousNibNames release], deliciousNibNames = nil; } [self deliciousDealloc]; } @end