122 lines
3.7 KiB
Objective-C
122 lines
3.7 KiB
Objective-C
#import "MASShortcutBinder.h"
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#import "MASShortcut.h"
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@interface MASShortcutBinder ()
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@property(strong) NSMutableDictionary *actions;
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@property(strong) NSMutableDictionary *shortcuts;
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@end
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@implementation MASShortcutBinder
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#pragma mark Initialization
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- (id) init
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{
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self = [super init];
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[self setActions:[NSMutableDictionary dictionary]];
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[self setShortcuts:[NSMutableDictionary dictionary]];
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[self setShortcutMonitor:[MASShortcutMonitor sharedMonitor]];
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[self setBindingOptions:@{NSValueTransformerNameBindingOption: NSKeyedUnarchiveFromDataTransformerName}];
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return self;
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}
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- (void) dealloc
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{
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for (NSString *bindingName in [_actions allKeys]) {
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[self unbind:bindingName];
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}
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}
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+ (instancetype) sharedBinder
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{
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static dispatch_once_t once;
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static MASShortcutBinder *sharedInstance;
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dispatch_once(&once, ^{
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sharedInstance = [[self alloc] init];
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});
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return sharedInstance;
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}
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#pragma mark Registration
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- (void) bindShortcutWithDefaultsKey: (NSString*) defaultsKeyName toAction: (dispatch_block_t) action
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{
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NSAssert([defaultsKeyName rangeOfString:@"."].location == NSNotFound,
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@"Illegal character in binding name (“.”), please see http://git.io/x5YS.");
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NSAssert([defaultsKeyName rangeOfString:@" "].location == NSNotFound,
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@"Illegal character in binding name (“ ”), please see http://git.io/x5YS.");
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[_actions setObject:[action copy] forKey:defaultsKeyName];
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[self bind:defaultsKeyName
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toObject:[NSUserDefaultsController sharedUserDefaultsController]
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withKeyPath:[@"values." stringByAppendingString:defaultsKeyName]
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options:_bindingOptions];
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}
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- (void) breakBindingWithDefaultsKey: (NSString*) defaultsKeyName
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{
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[_shortcutMonitor unregisterShortcut:[_shortcuts objectForKey:defaultsKeyName]];
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[_shortcuts removeObjectForKey:defaultsKeyName];
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[_actions removeObjectForKey:defaultsKeyName];
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[self unbind:defaultsKeyName];
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}
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- (void) registerDefaultShortcuts: (NSDictionary*) defaultShortcuts
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{
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NSValueTransformer *transformer = [_bindingOptions valueForKey:NSValueTransformerBindingOption];
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if (transformer == nil) {
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NSString *transformerName = [_bindingOptions valueForKey:NSValueTransformerNameBindingOption];
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if (transformerName) {
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transformer = [NSValueTransformer valueTransformerForName:transformerName];
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}
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}
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NSAssert(transformer != nil, @"Can’t register default shortcuts without a transformer.");
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[defaultShortcuts enumerateKeysAndObjectsUsingBlock:^(NSString *defaultsKey, MASShortcut *shortcut, BOOL *stop) {
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id value = [transformer reverseTransformedValue:shortcut];
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[[NSUserDefaults standardUserDefaults] registerDefaults:@{defaultsKey:value}];
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}];
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}
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#pragma mark Bindings
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- (BOOL) isRegisteredAction: (NSString*) name
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{
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return !![_actions objectForKey:name];
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}
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- (id) valueForUndefinedKey: (NSString*) key
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{
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return [self isRegisteredAction:key] ?
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[_shortcuts objectForKey:key] :
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[super valueForUndefinedKey:key];
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}
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- (void) setValue: (id) value forUndefinedKey: (NSString*) key
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{
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if (![self isRegisteredAction:key]) {
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[super setValue:value forUndefinedKey:key];
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return;
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}
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MASShortcut *newShortcut = value;
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MASShortcut *currentShortcut = [_shortcuts objectForKey:key];
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// Unbind previous shortcut if any
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if (currentShortcut != nil) {
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[_shortcutMonitor unregisterShortcut:currentShortcut];
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}
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// Just deleting the old shortcut
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if (newShortcut == nil) {
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[_shortcuts removeObjectForKey:key];
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return;
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}
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// Bind new shortcut
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[_shortcuts setObject:newShortcut forKey:key];
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[_shortcutMonitor registerShortcut:newShortcut withAction:[_actions objectForKey:key]];
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}
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@end
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