A tweak to enable long-press to copy the text/source/link of a comment in Reddit.app

CommentsViewController+LongPress.m

//
//  CommentsViewController+LongPress.m
//  RedditEasyCopy
//
//  Created by Tanner Bennett on 2017-08-11
//  
//  This is the "non-tweak" version of the relevant code.
//  The .xm file is a tweak, you can ignore it. This file
//  has the code that should be put into the app itself.
//


@interface TBMenuItem : UIMenuItem
+ (instancetype)title:(NSString *)title action:(SEL)action copy:(NSString *)string;
@property (nonatomic, readonly) NSString *storage;
@end

@implementation TBMenuItem
+ (instancetype)title:(NSString *)title action:(SEL)action copy:(NSString *)string {
    TBMenuItem *item = [[TBMenuItem alloc] initWithTitle:title action:action];
    item->_storage = string;
    return item;
}
@end

@implementation CommentsViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    ...

    UILongPressGestureRecognizer *gesture = [
        [UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(didLongPressComment:)
    ];
    gesture.minimumPressDuration = .5;
    [self.feedCollectionView addGestureRecognizer:gesture];
}

- (void)didLongPressComment:(UILongPressGestureRecognizer *)gesture {
    if (gesture.state == UIGestureRecognizerStateBegan) {
        
        CGPoint point   = [gesture locationInView:self.feedCollectionView];
        NSIndexPath *ip = [self.feedCollectionView indexPathForItemAtPoint:point];
        if (!ip) return;

        [self becomeFirstResponder];

        UIMenuController *menu = [UIMenuController sharedMenuController];
        [menu setTargetRect:CGRectMake(
            point.x - 22, point.y - 22, 44, 44
        ) inView:self.feedCollectionView];

        Comment *comment = self.commentsManager.flattenedObjects[ip.row];


        menu.menuItems = @[
            [TBMenuItem title:@"Text" action:@selector(copyText:) copy:comment.bodyAttributedText.string],
            [TBMenuItem title:@"Source" action:@selector(copySource:) copy:comment.bodyText],
            [TBMenuItem title:@"Link" action:@selector(copyLink:) copy:comment.permalink]
        ];

        [menu update];
        [menu setMenuVisible:YES animated:YES];
    }
}

- (void)copyStorageFromIdx:(NSUInteger)idx of:(UIMenuController *)controller {
    TBMenuItem *item = (id)controller.menuItems[idx];
    [UIPasteboard generalPasteboard].string = item.storage;
}

// Three separate methods are unfortunately necessary
// because of how convoluted the UIMenuController API is.

- (void)copyText:(UIMenuController *)controller {
    [self copyStorageFromIdx:0 of:controller];
}

- (void)copySource:(UIMenuController *)controller {
    [self copyStorageFromIdx:1 of:controller];
}

- (void)copyLink:(UIMenuController *)controller {
    [self copyStorageFromIdx:2 of:controller];
}

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
    return action == @selector(copyText:) ||
           action == @selector(copySource:) ||
           action == @selector(copyLink:);
}

- (BOOL)canBecomeFirstResponder { return YES; }

@end

RedditEasyCopy.xm

//
//  RedditEasyCopy.xm
//  RedditEasyCopy
//
//  Created by Tanner Bennett on 2017-08-11
//  Copyright © 2017 Tanner Bennett. All rights reserved.
//

#import "Interfaces.h"


@interface TBMenuItem : UIMenuItem
+ (instancetype)title:(NSString *)title action:(SEL)action copy:(NSString *)string;
@property (nonatomic, readonly) NSString *storage;
@end

@implementation TBMenuItem
+ (instancetype)title:(NSString *)title action:(SEL)action copy:(NSString *)string {
    TBMenuItem *item = [[TBMenuItem alloc] initWithTitle:title action:action];
    item->_storage = string;
    return item;
}
@end

%hook CommentsViewController

- (void)viewDidLoad {
    %orig;

    UILongPressGestureRecognizer *gesture = [
        [UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(didLongPressComment:)
    ];
    gesture.minimumPressDuration = .5;
    [self.feedCollectionView addGestureRecognizer:gesture];
}

%new
- (void)didLongPressComment:(UILongPressGestureRecognizer *)gesture {
    if (gesture.state == UIGestureRecognizerStateBegan) {
        
        CGPoint point   = [gesture locationInView:self.feedCollectionView];
        NSIndexPath *ip = [self.feedCollectionView indexPathForItemAtPoint:point];
        if (!ip) return;

        [self becomeFirstResponder];

        UIMenuController *menu = [UIMenuController sharedMenuController];
        [menu setTargetRect:CGRectMake(
            point.x - 22, point.y - 22, 44, 44
        ) inView:self.feedCollectionView];

        Comment *comment = self.commentsManager.flattenedObjects[ip.row];


        menu.menuItems = @[
            [TBMenuItem title:@"Text" action:@selector(copyText:) copy:comment.bodyAttributedText.string],
            [TBMenuItem title:@"Source" action:@selector(copySource:) copy:comment.bodyText],
            [TBMenuItem title:@"Link" action:@selector(copyLink:) copy:comment.permalink]
        ];

        [menu update];
        [menu setMenuVisible:YES animated:YES];
    }
}

%new
- (void)copyStorageFromIdx:(NSUInteger)idx of:(UIMenuController *)controller {
    TBMenuItem *item = (id)controller.menuItems[idx];
    [UIPasteboard generalPasteboard].string = item.storage;
}

%new
- (void)copyText:(UIMenuController *)controller {
    [self copyStorageFromIdx:0 of:controller];
}

%new
- (void)copySource:(UIMenuController *)controller {
    [self copyStorageFromIdx:1 of:controller];
}

%new
- (void)copyLink:(UIMenuController *)controller {
    [self copyStorageFromIdx:2 of:controller];
}

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
    return action == @selector(copyText:) ||
           action == @selector(copySource:) ||
           action == @selector(copyLink:);
}

- (BOOL)canBecomeFirstResponder { return YES; }

%end