117 lines
3.2 KiB
Objective-C
117 lines
3.2 KiB
Objective-C
// Copyright 2004-present Facebook. All Rights Reserved.
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#import "RCTKeyCommands.h"
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#import <UIKit/UIKit.h>
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#import "RCTUtils.h"
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@interface RCTKeyCommands ()
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@property (nonatomic, strong) NSMutableDictionary *commandBindings;
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- (void)RCT_handleKeyCommand:(UIKeyCommand *)key;
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@end
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@implementation UIApplication (RCTKeyCommands)
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- (NSArray *)RCT_keyCommands
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{
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NSDictionary *commandBindings = [RCTKeyCommands sharedInstance].commandBindings;
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return [[self RCT_keyCommands] arrayByAddingObjectsFromArray:[commandBindings allKeys]];
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}
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- (BOOL)RCT_sendAction:(SEL)action to:(id)target from:(id)sender forEvent:(UIEvent *)event
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{
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if (action == @selector(RCT_handleKeyCommand:)) {
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[[RCTKeyCommands sharedInstance] RCT_handleKeyCommand:sender];
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return YES;
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}
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return [self RCT_sendAction:action to:target from:sender forEvent:event];
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}
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@end
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@implementation RCTKeyCommands
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+ (void)initialize
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{
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//swizzle UIApplication
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RCTSwapInstanceMethods([UIApplication class], @selector(keyCommands), @selector(RCT_keyCommands));
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RCTSwapInstanceMethods([UIApplication class], @selector(sendAction:to:from:forEvent:), @selector(RCT_sendAction:to:from:forEvent:));
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}
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static RCTKeyCommands *RKKeyCommandsSharedInstance = nil;
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+ (instancetype)sharedInstance
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{
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static RCTKeyCommands *sharedInstance;
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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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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- (instancetype)init
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{
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if ((self = [super init])) {
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_commandBindings = [[NSMutableDictionary alloc] init];
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}
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return self;
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}
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- (void)RCT_handleKeyCommand:(UIKeyCommand *)key
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{
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// NOTE: We should just be able to do commandBindings[key] here, but curiously, the
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// lookup seems to return nil sometimes, even if the key is found in the dictionary.
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// To fix this, we use a linear search, since there won't be many keys anyway
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[_commandBindings enumerateKeysAndObjectsUsingBlock:^(UIKeyCommand *k, void (^block)(UIKeyCommand *), BOOL *stop) {
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if ([key.input isEqualToString:k.input] && key.modifierFlags == k.modifierFlags) {
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block(key);
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}
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}];
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}
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- (void)registerKeyCommandWithInput:(NSString *)input
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modifierFlags:(UIKeyModifierFlags)flags
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action:(void (^)(UIKeyCommand *))block
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{
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RCTAssertMainThread();
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UIKeyCommand *command = [UIKeyCommand keyCommandWithInput:input
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modifierFlags:flags
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action:@selector(RCT_handleKeyCommand:)];
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_commandBindings[command] = block;
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}
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- (void)unregisterKeyCommandWithInput:(NSString *)input modifierFlags:(UIKeyModifierFlags)flags
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{
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RCTAssertMainThread();
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for (UIKeyCommand *key in [_commandBindings allKeys]) {
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if ([key.input isEqualToString:input] && key.modifierFlags == flags) {
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[_commandBindings removeObjectForKey:key];
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break;
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}
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}
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}
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- (BOOL)isKeyCommandRegisteredForInput:(NSString *)input
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modifierFlags:(UIKeyModifierFlags)flags
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{
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RCTAssertMainThread();
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for (UIKeyCommand *key in [_commandBindings allKeys]) {
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if ([key.input isEqualToString:input] && key.modifierFlags == flags) {
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return YES;
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}
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}
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return NO;
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}
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@end
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