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Add support for keyboard shortcuts in the simulator
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| // | ||
| // FLEXKeyboardShortcutManager.h | ||
| // FLEX | ||
| // | ||
| // Created by Ryan Olson on 9/19/15. | ||
| // Copyright © 2015 Flipboard. All rights reserved. | ||
| // | ||
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| #import <UIKit/UIKit.h> | ||
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| #if TARGET_OS_SIMULATOR | ||
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| @interface FLEXKeyboardShortcutManager : NSObject | ||
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| + (instancetype)sharedManager; | ||
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| - (void)registerSimulatorShortcutWithKey:(NSString *)key modifiers:(UIKeyModifierFlags)modifiers action:(dispatch_block_t)action description:(NSString *)description; | ||
| - (NSString *)keyboardShortcutsDescription; | ||
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| @property (nonatomic, assign, getter=isEnabled) BOOL enabled; | ||
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| @end | ||
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| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,243 @@ | ||
| // | ||
| // FLEXKeyboardShortcutManager.m | ||
| // FLEX | ||
| // | ||
| // Created by Ryan Olson on 9/19/15. | ||
| // Copyright © 2015 Flipboard. All rights reserved. | ||
| // | ||
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| #import "FLEXKeyboardShortcutManager.h" | ||
| #import "FLEXUtility.h" | ||
| #import <objc/runtime.h> | ||
| #import <objc/message.h> | ||
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| #if TARGET_OS_SIMULATOR | ||
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| @interface UIEvent (UIPhysicalKeyboardEvent) | ||
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| @property (nonatomic, strong) NSString *_modifiedInput; | ||
| @property (nonatomic, strong) NSString *_unmodifiedInput; | ||
| @property (nonatomic, assign) UIKeyModifierFlags _modifierFlags; | ||
| @property (nonatomic, assign) BOOL _isKeyDown; | ||
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| @end | ||
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| @interface FLEXKeyInput : NSObject <NSCopying> | ||
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| @property (nonatomic, copy, readonly) NSString *key; | ||
| @property (nonatomic, assign, readonly) UIKeyModifierFlags flags; | ||
| @property (nonatomic, copy, readonly) NSString *helpDescription; | ||
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| @end | ||
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| @implementation FLEXKeyInput | ||
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| - (BOOL)isEqual:(id)object | ||
| { | ||
| BOOL isEqual = NO; | ||
| if ([object isKindOfClass:[FLEXKeyInput class]]) { | ||
| FLEXKeyInput *keyCommand = (FLEXKeyInput *)object; | ||
| BOOL equalKeys = self.key == keyCommand.key || [self.key isEqual:keyCommand.key]; | ||
| BOOL equalFlags = self.flags == keyCommand.flags; | ||
| isEqual = equalKeys && equalFlags; | ||
| } | ||
| return isEqual; | ||
| } | ||
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| - (NSUInteger)hash | ||
| { | ||
| return [self.key hash] ^ self.flags; | ||
| } | ||
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| - (id)copyWithZone:(NSZone *)zone | ||
| { | ||
| return [[self class] keyInputForKey:self.key flags:self.flags helpDescription:self.helpDescription]; | ||
| } | ||
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| - (NSString *)description | ||
| { | ||
| NSDictionary *keyMappings = @{ UIKeyInputUpArrow : @"↑", | ||
| UIKeyInputDownArrow : @"↓", | ||
| UIKeyInputLeftArrow : @"←", | ||
| UIKeyInputRightArrow : @"→", | ||
| UIKeyInputEscape : @"␛", | ||
| @" " : @"␠"}; | ||
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| NSString *prettyKey = nil; | ||
| if (self.key && [keyMappings objectForKey:self.key]) { | ||
| prettyKey = [keyMappings objectForKey:self.key]; | ||
| } else { | ||
| prettyKey = [self.key uppercaseString]; | ||
| } | ||
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| NSString *prettyFlags = @""; | ||
| if (self.flags & UIKeyModifierControl) { | ||
| prettyFlags = [prettyFlags stringByAppendingString:@"⌃"]; | ||
| } | ||
| if (self.flags & UIKeyModifierAlternate) { | ||
| prettyFlags = [prettyFlags stringByAppendingString:@"⌥"]; | ||
| } | ||
| if (self.flags & UIKeyModifierShift) { | ||
| prettyFlags = [prettyFlags stringByAppendingString:@"⇧"]; | ||
| } | ||
| if (self.flags & UIKeyModifierCommand) { | ||
| prettyFlags = [prettyFlags stringByAppendingString:@"⌘"]; | ||
| } | ||
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| // Fudging to get easy columns with tabs | ||
| if ([prettyFlags length] < 2) { | ||
| prettyKey = [prettyKey stringByAppendingString:@"\t"]; | ||
| } | ||
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| return [NSString stringWithFormat:@"%@%@\t%@", prettyFlags, prettyKey, self.helpDescription]; | ||
| } | ||
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| + (instancetype)keyInputForKey:(NSString *)key flags:(UIKeyModifierFlags)flags | ||
| { | ||
| return [self keyInputForKey:key flags:flags helpDescription:nil]; | ||
| } | ||
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| + (instancetype)keyInputForKey:(NSString *)key flags:(UIKeyModifierFlags)flags helpDescription:(NSString *)helpDescription | ||
| { | ||
| FLEXKeyInput *keyInput = [[self alloc] init]; | ||
| if (keyInput) { | ||
| keyInput->_key = key; | ||
| keyInput->_flags = flags; | ||
| keyInput->_helpDescription = helpDescription; | ||
| } | ||
| return keyInput; | ||
| } | ||
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| @end | ||
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| @interface FLEXKeyboardShortcutManager () | ||
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| @property (nonatomic, strong) NSMutableDictionary *actionsForKeyInputs; | ||
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| @end | ||
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| @implementation FLEXKeyboardShortcutManager | ||
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| + (instancetype)sharedManager | ||
| { | ||
| static FLEXKeyboardShortcutManager *sharedManager = nil; | ||
| static dispatch_once_t onceToken; | ||
| dispatch_once(&onceToken, ^{ | ||
| sharedManager = [[[self class] alloc] init]; | ||
| }); | ||
| return sharedManager; | ||
| } | ||
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| + (void)load | ||
| { | ||
| SEL originalKeyEventSelector = NSSelectorFromString(@"handleKeyUIEvent:"); | ||
| SEL swizzledKeyEventSelector = [FLEXUtility swizzledSelectorForSelector:originalKeyEventSelector]; | ||
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| void (^sendEventSwizzleBlock)(UIApplication *, UIEvent *) = ^(UIApplication *slf, UIEvent *event) { | ||
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| [[[self class] sharedManager] handleKeyboardEvent:event]; | ||
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| ((void(*)(id, SEL, id))objc_msgSend)(slf, swizzledKeyEventSelector, event); | ||
| }; | ||
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| [FLEXUtility replaceImplementationOfKnownSelector:originalKeyEventSelector onClass:[UIApplication class] withBlock:sendEventSwizzleBlock swizzledSelector:swizzledKeyEventSelector]; | ||
| } | ||
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| - (instancetype)init | ||
| { | ||
| self = [super init]; | ||
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| if (self) { | ||
| _actionsForKeyInputs = [NSMutableDictionary dictionary]; | ||
| _enabled = YES; | ||
| } | ||
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| return self; | ||
| } | ||
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| - (void)registerSimulatorShortcutWithKey:(NSString *)key modifiers:(UIKeyModifierFlags)modifiers action:(dispatch_block_t)action description:(NSString *)description | ||
| { | ||
| FLEXKeyInput *keyInput = [FLEXKeyInput keyInputForKey:key flags:modifiers helpDescription:description]; | ||
| [self.actionsForKeyInputs setObject:action forKey:keyInput]; | ||
| } | ||
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| - (void)handleKeyboardEvent:(UIEvent *)event | ||
| { | ||
| if (!self.enabled) { | ||
| return; | ||
| } | ||
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| NSString *modifiedInput = nil; | ||
| NSString *unmodifiedInput = nil; | ||
| UIKeyModifierFlags flags = 0; | ||
| BOOL isKeyDown = NO; | ||
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| if ([event respondsToSelector:@selector(_modifiedInput)]) { | ||
| modifiedInput = [event _modifiedInput]; | ||
| } | ||
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| if ([event respondsToSelector:@selector(_unmodifiedInput)]) { | ||
| unmodifiedInput = [event _unmodifiedInput]; | ||
| } | ||
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| if ([event respondsToSelector:@selector(_modifierFlags)]) { | ||
| flags = [event _modifierFlags]; | ||
| } | ||
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| if ([event respondsToSelector:@selector(_isKeyDown)]) { | ||
| isKeyDown = [event _isKeyDown]; | ||
| } | ||
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| BOOL interactionEnabled = ![[UIApplication sharedApplication] isIgnoringInteractionEvents]; | ||
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| if (isKeyDown && [modifiedInput length] > 0 && interactionEnabled) { | ||
| UIResponder *firstResponder = nil; | ||
| for (UIWindow *window in [[UIApplication sharedApplication] windows]) { | ||
| firstResponder = [window valueForKey:@"firstResponder"]; | ||
| if (firstResponder) { | ||
| break; | ||
| } | ||
| } | ||
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| // Ignore key commands (except escape) when there's an active responder | ||
| if (firstResponder) { | ||
| if ([unmodifiedInput isEqual:UIKeyInputEscape]) { | ||
| [firstResponder resignFirstResponder]; | ||
| } | ||
| } else { | ||
| FLEXKeyInput *exactMatch = [FLEXKeyInput keyInputForKey:unmodifiedInput flags:flags]; | ||
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| dispatch_block_t actionBlock = [self.actionsForKeyInputs objectForKey:exactMatch]; | ||
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| if (!actionBlock) { | ||
| FLEXKeyInput *shiftMatch = [FLEXKeyInput keyInputForKey:modifiedInput flags:flags&(!UIKeyModifierShift)]; | ||
| actionBlock = [self.actionsForKeyInputs objectForKey:shiftMatch]; | ||
| } | ||
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| if (!actionBlock) { | ||
| FLEXKeyInput *capitalMatch = [FLEXKeyInput keyInputForKey:[unmodifiedInput uppercaseString] flags:flags]; | ||
| actionBlock = [self.actionsForKeyInputs objectForKey:capitalMatch]; | ||
| } | ||
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| if (actionBlock) { | ||
| actionBlock(); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| - (NSString *)keyboardShortcutsDescription | ||
| { | ||
| NSMutableString *description = [NSMutableString string]; | ||
| NSArray *keyInputs = [[self.actionsForKeyInputs allKeys] sortedArrayUsingComparator:^NSComparisonResult(FLEXKeyInput *_Nonnull input1, FLEXKeyInput *_Nonnull input2) { | ||
| return [input1.key caseInsensitiveCompare:input2.key]; | ||
| }]; | ||
| for (FLEXKeyInput *keyInput in keyInputs) { | ||
| [description appendFormat:@"%@\n", keyInput]; | ||
| } | ||
| return [description copy]; | ||
| } | ||
|
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| @end | ||
|
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| #endif |
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