NewsBlur/media/ios/Classes/NBContainerViewController.m

//
//  NBContainerViewController.m
//  NewsBlur
//
//  Created by Roy Yang on 7/24/12.
//  Copyright (c) 2012 NewsBlur. All rights reserved.
//

#import "NBContainerViewController.h"
#import "NewsBlurViewController.h"
#import "FeedDetailViewController.h"
#import "DashboardViewController.h"
#import "StoryDetailViewController.h"
#import "ShareViewController.h"
#import "UserProfileViewController.h"

#define NB_DEFAULT_MASTER_WIDTH 270
#define NB_DEFAULT_STORY_TITLE_HEIGHT 1024 - 640
#define NB_DEFAULT_SLIDER_INTERVAL 0.4
#define NB_DEFAULT_SHARE_HEIGHT 120
#define NB_DEFAULT_STORY_TITLE_SNAP_THRESHOLD 60

@interface NBContainerViewController ()

@property (nonatomic, strong) UINavigationController *masterNavigationController;
@property (nonatomic, strong) UINavigationController *storyNavigationController;
@property (nonatomic, strong) NewsBlurViewController *feedsViewController;
@property (nonatomic, strong) FeedDetailViewController *feedDetailViewController;
@property (nonatomic, strong) DashboardViewController *dashboardViewController;
@property (nonatomic, strong) StoryDetailViewController *storyDetailViewController;
@property (nonatomic, strong) ShareViewController *shareViewController;
@property (nonatomic, strong) UIView *storyTitlesStub;
@property (readwrite) BOOL storyTitlesOnLeft;
@property (readwrite) int storyTitlesYCoordinate;

@property (readwrite) BOOL isSharingStory;
@property (readwrite) BOOL isHidingStory;
@property (readwrite) BOOL feedDetailIsVisible;

@property (nonatomic, strong) UIPopoverController *popoverController;

@end

@implementation NBContainerViewController

@synthesize appDelegate;
@synthesize masterNavigationController;
@synthesize feedsViewController;
@synthesize feedDetailViewController;
@synthesize dashboardViewController;
@synthesize storyDetailViewController;
@synthesize shareViewController;
@synthesize feedDetailIsVisible;
@synthesize storyNavigationController;
@synthesize storyTitlesYCoordinate;
@synthesize storyTitlesOnLeft;
@synthesize popoverController;
@synthesize storyTitlesStub;
@synthesize isSharingStory;
@synthesize isHidingStory;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
        

    }
    return self;
}

- (void)viewDidLoad
{
    
    [super viewDidLoad];
	// Do any additional setup after loading the view.
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShowOrHide:) name:UIKeyboardWillShowNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShowOrHide:) name:UIKeyboardWillHideNotification object:nil];
    
    self.view.backgroundColor = [UIColor blackColor]; 
    
    self.masterNavigationController = appDelegate.navigationController;
    self.feedsViewController = appDelegate.feedsViewController;
    self.dashboardViewController = appDelegate.dashboardViewController;
    self.feedDetailViewController = appDelegate.feedDetailViewController;
    self.storyDetailViewController = appDelegate.storyDetailViewController;
    self.shareViewController = appDelegate.shareViewController;
    
    // adding dashboardViewController 
    [self addChildViewController:self.dashboardViewController];
    [self.view addSubview:self.dashboardViewController.view];
    [self.dashboardViewController didMoveToParentViewController:self];
    
    // adding master navigation controller
    [self addChildViewController:self.masterNavigationController];
    [self.view addSubview:self.masterNavigationController.view];
    [self.masterNavigationController didMoveToParentViewController:self];
    
    UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:self.storyDetailViewController];
    self.storyNavigationController = nav;
    
    // set default y coordinate for feedDetailY from saved preferences
    NSUserDefaults *userPreferences = [NSUserDefaults standardUserDefaults];
    NSInteger savedStoryTitlesYCoordinate = [userPreferences integerForKey:@"storyTitlesYCoordinate"];
    if (savedStoryTitlesYCoordinate == 1004) {
        self.storyTitlesYCoordinate = savedStoryTitlesYCoordinate;
        self.storyTitlesOnLeft = YES;
    } else if (savedStoryTitlesYCoordinate) {
        self.storyTitlesYCoordinate = savedStoryTitlesYCoordinate;
        self.storyTitlesOnLeft = NO;
    } else {
        self.storyTitlesYCoordinate = NB_DEFAULT_STORY_TITLE_HEIGHT;
        self.storyTitlesOnLeft = NO;
    }
    
    // set up story titles stub
    UIView * storyTitlesPlaceholder = [[UIView alloc] initWithFrame:CGRectZero];
    storyTitlesPlaceholder.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;;
    storyTitlesPlaceholder.autoresizesSubviews = YES;
    storyTitlesPlaceholder.backgroundColor = [UIColor whiteColor];
        
    self.storyTitlesStub = storyTitlesPlaceholder;
    [self.view addSubview:self.storyTitlesStub];
}

- (void)viewWillLayoutSubviews {
    [self adjustDashboardScreen];
}

- (void)viewDidUnload {
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
	return YES;
}

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
    if (!self.feedDetailIsVisible) {
        [self adjustDashboardScreen];
    } else {
        [self adjustFeedDetailScreen];
    }
}

# pragma mark Modals and Popovers

- (void)showUserProfilePopover:(id)sender {    
    if (popoverController == nil) {
        popoverController = [[UIPopoverController alloc]
                             initWithContentViewController:appDelegate.userProfileViewController];
        
        popoverController.delegate = self;
    } else {
        if (popoverController.isPopoverVisible) {
            [popoverController dismissPopoverAnimated:YES];
            return;
        }
        [popoverController setContentViewController:appDelegate.userProfileViewController];
    }
    
    [popoverController setPopoverContentSize:CGSizeMake(320, 416)];
    [popoverController presentPopoverFromBarButtonItem:sender 
                              permittedArrowDirections:UIPopoverArrowDirectionAny 
                                              animated:YES];  
}

# pragma mark Screen Transitions and Layout

- (void)adjustDashboardScreen {
    CGRect vb = [self.view bounds];
    self.masterNavigationController.view.frame = CGRectMake(0, 0, NB_DEFAULT_MASTER_WIDTH, vb.size.height);
    self.dashboardViewController.view.frame = CGRectMake(NB_DEFAULT_MASTER_WIDTH + 1, 0, vb.size.width - NB_DEFAULT_MASTER_WIDTH - 1, vb.size.height);
}

- (void)adjustFeedDetailScreen {
    CGRect vb = [self.view bounds];
    
    UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
	if (UIInterfaceOrientationIsPortrait(orientation) && !self.storyTitlesOnLeft) {
        // add the back button
        self.storyDetailViewController.navigationItem.leftBarButtonItem = self.storyDetailViewController.buttonBack;
        
        // set center title
        UIView *titleLabel = [appDelegate makeFeedTitle:appDelegate.activeFeed];
        self.storyDetailViewController.navigationItem.titleView = titleLabel;
        
        if ([[self.masterNavigationController viewControllers] containsObject:self.feedDetailViewController]) {
            [self.masterNavigationController popViewControllerAnimated:NO];
        }
        self.storyNavigationController.view.frame = CGRectMake(0, 0, vb.size.width, self.storyTitlesYCoordinate);
        self.feedDetailViewController.view.frame = CGRectMake(0, self.storyTitlesYCoordinate, vb.size.width, vb.size.height - self.storyTitlesYCoordinate);
        [self.view insertSubview:self.feedDetailViewController.view atIndex:0];
        [self.masterNavigationController.view removeFromSuperview];
    } else {
        // remove the back button
        self.storyDetailViewController.navigationItem.leftBarButtonItem = nil;
        
        // remove center title
        self.storyDetailViewController.navigationItem.titleView = nil;
        
        if (![[self.masterNavigationController viewControllers] containsObject:self.feedDetailViewController]) {
            [self.masterNavigationController pushViewController:self.feedDetailViewController animated:NO];        
        }
        [self.view addSubview:self.masterNavigationController.view];
        self.masterNavigationController.view.frame = CGRectMake(0, 0, NB_DEFAULT_MASTER_WIDTH, vb.size.height);
        self.storyNavigationController.view.frame = CGRectMake(NB_DEFAULT_MASTER_WIDTH + 1, 0, vb.size.width - NB_DEFAULT_MASTER_WIDTH - 1, vb.size.height);
    }
}

- (void)adjustFeedDetailScreenForStoryTitles {
    CGRect vb = [self.view bounds];
    if (!self.storyTitlesOnLeft) {
        if (self.storyTitlesYCoordinate > 890) {
            NSUserDefaults *userPreferences = [NSUserDefaults standardUserDefaults];   
            // save coordinate
            [userPreferences setInteger:1004 forKey:@"storyTitlesYCoordinate"];
            [userPreferences synchronize];
            self.storyTitlesYCoordinate = 1004;
            // slide to the left
            
            self.storyTitlesOnLeft = YES;
            
            // remove the back button
            self.storyDetailViewController.navigationItem.leftBarButtonItem = nil;
            
            // remove center title
            self.storyDetailViewController.navigationItem.titleView = nil;
            
            if (![[self.masterNavigationController viewControllers] containsObject:self.feedDetailViewController]) {
                [self.masterNavigationController pushViewController:self.feedDetailViewController animated:NO];        
            }
            
            [self.view addSubview:self.masterNavigationController.view];
            self.masterNavigationController.view.frame = CGRectMake(-NB_DEFAULT_MASTER_WIDTH, 0, NB_DEFAULT_MASTER_WIDTH, vb.size.height);
            [UIView animateWithDuration:NB_DEFAULT_SLIDER_INTERVAL delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
                self.masterNavigationController.view.frame = CGRectMake(0, 0, NB_DEFAULT_MASTER_WIDTH, vb.size.height);
                self.storyNavigationController.view.frame = CGRectMake(NB_DEFAULT_MASTER_WIDTH + 1, 0, vb.size.width - NB_DEFAULT_MASTER_WIDTH - 1, vb.size.height);
            } completion:^(BOOL finished) {
                [self.feedDetailViewController checkScroll];
                [appDelegate adjustStoryDetailWebView];
            }];
        } 
    } else if (self.storyTitlesOnLeft) {
        if (self.storyTitlesYCoordinate == 1004) {
            return;
        } else if (self.storyTitlesYCoordinate > 890) {
            NSUserDefaults *userPreferences = [NSUserDefaults standardUserDefaults];   
            // save coordinate
            [userPreferences setInteger:890 forKey:@"storyTitlesYCoordinate"];
            [userPreferences synchronize];
            self.storyTitlesYCoordinate = 890;
        }
        self.storyTitlesOnLeft = NO;
        
        // add the back button
        self.storyDetailViewController.navigationItem.leftBarButtonItem = self.storyDetailViewController.buttonBack;
        
        // set center title
        UIView *titleLabel = [appDelegate makeFeedTitle:appDelegate.activeFeed];
        self.storyDetailViewController.navigationItem.titleView = titleLabel;
        
        [UIView animateWithDuration:NB_DEFAULT_SLIDER_INTERVAL delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
//            self.masterNavigationController.view.frame = CGRectMake(-NB_DEFAULT_MASTER_WIDTH, 0, NB_DEFAULT_MASTER_WIDTH, vb.size.height);
            
            [self.masterNavigationController.view removeFromSuperview];
            self.storyNavigationController.view.frame = CGRectMake(0, 0, vb.size.width, storyTitlesYCoordinate);
            
            self.storyTitlesStub.frame = CGRectMake(0, storyTitlesYCoordinate, vb.size.width, vb.size.height - storyTitlesYCoordinate);
        } completion:^(BOOL finished) {
            if ([[self.masterNavigationController viewControllers] containsObject:self.feedDetailViewController]) {
                [self.masterNavigationController popViewControllerAnimated:NO];
            }
            [self.view insertSubview:self.feedDetailViewController.view aboveSubview:self.storyTitlesStub];
            self.feedDetailViewController.view.frame = CGRectMake(0, storyTitlesYCoordinate, vb.size.width, vb.size.height - storyTitlesYCoordinate);
            self.storyTitlesStub.hidden = YES;
            [self.feedDetailViewController checkScroll];
            [appDelegate adjustStoryDetailWebView];
        }];    
    }
}

- (void)transitionToFeedDetail {
    self.feedDetailIsVisible = YES;
    CGRect vb = [self.view bounds];
        
    // adding feedDetailViewController 
    [self addChildViewController:self.feedDetailViewController];
    [self.view addSubview:self.feedDetailViewController.view];
    [self.feedDetailViewController didMoveToParentViewController:self];
    
    // adding storyDetailViewController 
    [self addChildViewController:self.storyNavigationController];
    [self.view addSubview:self.storyNavigationController.view];
    [self.storyNavigationController didMoveToParentViewController:self];
    
    // reset the storyDetailViewController components
    self.storyDetailViewController.webView.hidden = YES;
    self.storyDetailViewController.bottomPlaceholderToolbar.hidden = NO;
    self.storyDetailViewController.progressViewContainer.hidden = YES;
    self.storyDetailViewController.navigationItem.rightBarButtonItems = nil;
    int unreadCount = appDelegate.unreadCount;
    if (unreadCount == 0) {
        self.storyDetailViewController.progressView.progress = 1;
    } else {
        self.storyDetailViewController.progressView.progress = 0;
    }
    
    UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
	if (UIInterfaceOrientationIsPortrait(orientation) && !self.storyTitlesOnLeft) {
        // CASE: story titles on bottom
        self.storyDetailViewController.navigationItem.leftBarButtonItem = self.storyDetailViewController.buttonBack;
        
        self.storyNavigationController.view.frame = CGRectMake(vb.size.width, 0, vb.size.width, storyTitlesYCoordinate);
        self.feedDetailViewController.view.frame = CGRectMake(vb.size.width, 
                                                              self.storyTitlesYCoordinate, 
                                                              vb.size.width, 
                                                              vb.size.height - storyTitlesYCoordinate);
        float largeTimeInterval = NB_DEFAULT_SLIDER_INTERVAL * ( vb.size.width - NB_DEFAULT_MASTER_WIDTH) / vb.size.width;
        float smallTimeInterval = NB_DEFAULT_SLIDER_INTERVAL * NB_DEFAULT_MASTER_WIDTH / vb.size.width;
        
        [UIView animateWithDuration:largeTimeInterval delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
            self.storyNavigationController.view.frame = CGRectMake(NB_DEFAULT_MASTER_WIDTH + 1, 0, vb.size.width, self.storyTitlesYCoordinate);
            self.feedDetailViewController.view.frame = CGRectMake(NB_DEFAULT_MASTER_WIDTH + 1, 
                                                                  self.storyTitlesYCoordinate, 
                                                                  vb.size.width, 
                                                                  vb.size.height - storyTitlesYCoordinate);
        } completion:^(BOOL finished) {
            
            [UIView animateWithDuration:smallTimeInterval delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
                self.storyNavigationController.view.frame = CGRectMake(0, 0, vb.size.width, self.storyTitlesYCoordinate);
                self.feedDetailViewController.view.frame = CGRectMake(0, self.storyTitlesYCoordinate, vb.size.width, vb.size.height - storyTitlesYCoordinate);
                self.masterNavigationController.view.frame = CGRectMake(-NB_DEFAULT_MASTER_WIDTH, 0, NB_DEFAULT_MASTER_WIDTH, vb.size.height);
            } completion:^(BOOL finished) {
                [self.dashboardViewController.view removeFromSuperview];
                [self.masterNavigationController.view removeFromSuperview];
            }];
        }];
        
        
        // set center title
        UIView *titleLabel = [appDelegate makeFeedTitle:appDelegate.activeFeed];
        self.storyDetailViewController.navigationItem.titleView = titleLabel;
        
//        // set right avatar title image
//        if (appDelegate.isSocialView) {
//            UIButton *titleImageButton = [appDelegate makeRightFeedTitle:appDelegate.activeFeed];
//            [titleImageButton addTarget:self action:@selector(showUserProfilePopover) forControlEvents:UIControlEventTouchUpInside];
//            UIBarButtonItem *titleImageBarButton = [[UIBarButtonItem alloc] 
//                                                    initWithCustomView:titleImageButton];
//            self.storyDetailViewController.navigationItem.rightBarButtonItem = titleImageBarButton;
//        } else {
//            self.storyDetailViewController.navigationItem.rightBarButtonItem = nil;
//        }
        
    } else {
        // CASE: story titles on left
        self.storyDetailViewController.navigationItem.leftBarButtonItem = nil;
        
        [self.masterNavigationController pushViewController:self.feedDetailViewController animated:YES];
        self.storyNavigationController.view.frame = CGRectMake(vb.size.width, 0, vb.size.width - NB_DEFAULT_MASTER_WIDTH - 1, vb.size.height);
        
        
        // CASE: story titles on left
        [UIView animateWithDuration:.35 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
            self.storyNavigationController.view.frame = CGRectMake(NB_DEFAULT_MASTER_WIDTH + 1, 
                                                                   0, 
                                                                   vb.size.width - NB_DEFAULT_MASTER_WIDTH - 1, 
                                                                   vb.size.height);
        } completion:^(BOOL finished) {
            [self.dashboardViewController.view removeFromSuperview];
        }];

        // remove center title
        self.storyDetailViewController.navigationItem.titleView = nil;
    }
}

- (void)transitionFromFeedDetail {
    if (!self.feedDetailIsVisible) {
        return;
    }
    if (self.isSharingStory) {
        [self transitionFromShareView];
    }
    
    self.feedDetailIsVisible = NO;
    CGRect vb = [self.view bounds];
    
    // adding dashboardViewController and masterNavigationController
    [self.view insertSubview:self.dashboardViewController.view atIndex:0];
    [self.view addSubview:self.masterNavigationController.view];
    
    UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
	if (UIInterfaceOrientationIsPortrait(orientation) && !self.storyTitlesOnLeft) {
        // CASE: story titles on bottom
        self.dashboardViewController.view.frame = CGRectMake(NB_DEFAULT_MASTER_WIDTH + 1, 0, vb.size.width - NB_DEFAULT_MASTER_WIDTH - 1, vb.size.height);
        self.masterNavigationController.view.frame = CGRectMake(-NB_DEFAULT_MASTER_WIDTH, 0, NB_DEFAULT_MASTER_WIDTH, vb.size.height);
        
        float largeTimeInterval = NB_DEFAULT_SLIDER_INTERVAL * ( vb.size.width - NB_DEFAULT_MASTER_WIDTH) / vb.size.width;
        float smallTimeInterval = NB_DEFAULT_SLIDER_INTERVAL * NB_DEFAULT_MASTER_WIDTH / vb.size.width;
        
        [UIView animateWithDuration:largeTimeInterval delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
            self.masterNavigationController.view.frame = CGRectMake(0, 0, NB_DEFAULT_MASTER_WIDTH, vb.size.height);
            self.storyNavigationController.view.frame = CGRectMake(NB_DEFAULT_MASTER_WIDTH, 
                                                                   0, 
                                                                   vb.size.width, 
                                                                   self.storyTitlesYCoordinate);
            self.feedDetailViewController.view.frame = CGRectMake(NB_DEFAULT_MASTER_WIDTH, 
                                                                  self.storyTitlesYCoordinate, 
                                                                  vb.size.width, 
                                                                  vb.size.height - storyTitlesYCoordinate);
        } completion:^(BOOL finished) {
            [UIView animateWithDuration:smallTimeInterval delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
                self.storyNavigationController.view.frame = CGRectMake(vb.size.width, 0, vb.size.width, self.storyTitlesYCoordinate);
                self.feedDetailViewController.view.frame = CGRectMake(vb.size.width, 
                                                                      self.storyTitlesYCoordinate, 
                                                                      vb.size.width, 
                                                                      vb.size.height - storyTitlesYCoordinate);
            } completion:^(BOOL finished) {
                [self.storyNavigationController.view removeFromSuperview];
                [self.feedDetailViewController.view removeFromSuperview];
            }];
        }]; 
    } else {
        // CASE: story titles on left
        [UIView animateWithDuration:0.35 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
            self.storyNavigationController.view.frame = CGRectMake(vb.size.width, 
                                                                   0, 
                                                                   self.storyNavigationController.view.frame.size.width, 
                                                                   self.storyNavigationController.view.frame.size.height);
            self.dashboardViewController.view.frame = CGRectMake(0, 
                                                                 0, 
                                                                 vb.size.width - NB_DEFAULT_MASTER_WIDTH - 1, 
                                                                 vb.size.height);
        } completion:^(BOOL finished) {
            
        }];
    }
}

- (void)transitionToShareView {
    if (isSharingStory) {
        return;
    } else {
        CGRect vb = [self.view bounds];
        self.isSharingStory = YES;
        
        // adding shareViewController 
        [self addChildViewController:self.shareViewController];
        [self.view insertSubview:self.shareViewController.view aboveSubview:self.storyNavigationController.view];
        [self.shareViewController didMoveToParentViewController:self];

        self.shareViewController.view.frame = CGRectMake(self.storyNavigationController.view.frame.origin.x, 
                                                         vb.size.height, 
                                                         self.storyDetailViewController.view.frame.size.width, 
                                                         NB_DEFAULT_SHARE_HEIGHT);
        [self.shareViewController.commentField becomeFirstResponder];
    }
}

- (void)transitionFromShareView {
    if (!isSharingStory) {
        return;
    } else {
        CGRect vb = [self.view bounds];
        self.isSharingStory = NO;
        
        if ([self.shareViewController.commentField isFirstResponder]) {
            self.isHidingStory = YES; // the flag allows the keyboard animation to also slide down the share view
            [self.shareViewController.commentField resignFirstResponder];
        } else {
            UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
            if (UIInterfaceOrientationIsPortrait(orientation) && !self.storyTitlesOnLeft) {
                self.storyNavigationController.view.frame = CGRectMake(self.storyNavigationController.view.frame.origin.x,
                                                                       0,
                                                                       self.storyNavigationController.view.frame.size.width,
                                                                       storyTitlesYCoordinate);
            } else {
                self.storyNavigationController.view.frame = CGRectMake(self.storyNavigationController.view.frame.origin.x,
                                                                       0,
                                                                       self.storyNavigationController.view.frame.size.width,
                                                                       vb.size.height);
            }
            
            [UIView animateWithDuration:NB_DEFAULT_SLIDER_INTERVAL animations:^{
                self.shareViewController.view.frame = CGRectMake(self.storyNavigationController.view.frame.origin.x,
                                                                 vb.size.height,
                                                                 self.storyNavigationController.view.frame.size.width,
                                                                 NB_DEFAULT_SHARE_HEIGHT);
            } completion:^(BOOL finished) {
                [self.shareViewController.view removeFromSuperview];
            }];
        }
    }
}

- (void)dragStoryToolbar:(int)yCoordinate {

    CGRect vb = [self.view bounds];
    // account for top toolbar and status bar
    yCoordinate = yCoordinate + 44 + 20;
    
    NSUserDefaults *userPreferences = [NSUserDefaults standardUserDefaults];   
    
    if (yCoordinate > 344 && yCoordinate <= (vb.size.height)) {
        
        // save coordinate
        self.storyTitlesYCoordinate = yCoordinate;
        [userPreferences setInteger:yCoordinate forKey:@"storyTitlesYCoordinate"];
        [userPreferences synchronize];
        
        // change frames

        self.storyNavigationController.view.frame = CGRectMake(self.storyNavigationController.view.frame.origin.x, 
                                                               0, 
                                                               self.storyNavigationController.view.frame.size.width, 
                                                               yCoordinate);
        if (self.storyTitlesOnLeft) {
            self.storyTitlesStub.hidden = NO;
            self.storyTitlesStub.frame = CGRectMake(self.storyNavigationController.view.frame.origin.x, 
                                                    yCoordinate, 
                                                    self.storyNavigationController.view.frame.size.width, 
                                                    vb.size.height - yCoordinate);
        } else {
            self.feedDetailViewController.view.frame = CGRectMake(self.storyNavigationController.view.frame.origin.x, 
                                                                  yCoordinate, 
                                                                  self.storyNavigationController.view.frame.size.width, 
                                                                  vb.size.height - yCoordinate);
            [self.feedDetailViewController checkScroll];
        }
    } else if (yCoordinate >= (vb.size.height)){
        // save coordinate
        [userPreferences setInteger:1004 forKey:@"storyTitlesYCoordinate"];
        [userPreferences synchronize];
        self.storyTitlesYCoordinate = 1004;
        self.storyNavigationController.view.frame = CGRectMake(self.storyNavigationController.view.frame.origin.x, 
                                                               0, 
                                                               self.storyNavigationController.view.frame.size.width, 
                                                               vb.size.height);
        if (self.storyTitlesOnLeft) {
            self.storyTitlesStub.hidden = NO;
            self.storyTitlesStub.frame = CGRectMake(self.feedDetailViewController.view.frame.origin.x, 
                                                    0, 
                                                    self.feedDetailViewController.view.frame.size.width, 
                                                    0);
        }
    }
}

-(void)keyboardWillShowOrHide:(NSNotification*)notification {
    NSDictionary *userInfo = notification.userInfo;
    NSTimeInterval duration = [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
    UIViewAnimationCurve curve = [[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] intValue];

    CGRect vb = [self.view bounds];
    CGRect keyboardFrame = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
     self.shareViewController.view.frame = CGRectMake(self.storyNavigationController.view.frame.origin.x,
                                       vb.size.height,
                                       self.storyNavigationController.view.frame.size.width,
                                       NB_DEFAULT_SHARE_HEIGHT);
                                       
    CGRect storyNavigationFrame = self.storyNavigationController.view.frame;
    CGRect shareViewFrame = self.shareViewController.view.frame;
    
    UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
    
    if ([notification.name isEqualToString:@"UIKeyboardWillShowNotification"]) {
        if (UIInterfaceOrientationIsPortrait(orientation)) {
            if (!self.storyTitlesOnLeft) {
                int newStoryNavigationFrameHeight = vb.size.height - NB_DEFAULT_SHARE_HEIGHT - keyboardFrame.size.height + 44;
                if (storyNavigationFrame.size.height < newStoryNavigationFrameHeight) {
                    storyNavigationFrame.size.height = newStoryNavigationFrameHeight;
                }
            }
            shareViewFrame.origin.y = vb.size.height - NB_DEFAULT_SHARE_HEIGHT - keyboardFrame.size.height;
        } else {
            storyNavigationFrame.size.height = vb.size.height - NB_DEFAULT_SHARE_HEIGHT - keyboardFrame.size.width + 44;
            shareViewFrame.origin.y = vb.size.height - NB_DEFAULT_SHARE_HEIGHT - keyboardFrame.size.width;
        }
    } else {
        if (UIInterfaceOrientationIsPortrait(orientation)) {
            storyNavigationFrame.size.height = vb.size.height - NB_DEFAULT_SHARE_HEIGHT + 44;
            shareViewFrame.origin.y = vb.size.height - NB_DEFAULT_SHARE_HEIGHT;
        } else {
            storyNavigationFrame.size.height = vb.size.height - NB_DEFAULT_SHARE_HEIGHT + 44;
            shareViewFrame.origin.y = vb.size.height - NB_DEFAULT_SHARE_HEIGHT;
        }
    }

    // CASE: when dismissing the keyboard but not dismissing the share view
    if ([notification.name isEqualToString:@"UIKeyboardWillHideNotification"] && !self.isHidingStory) {
        self.storyNavigationController.view.frame = storyNavigationFrame;
    // CASE: when dismissing the keyboard AND dismissing the share view
    } else if ([notification.name isEqualToString:@"UIKeyboardWillHideNotification"] && self.isHidingStory) {
        self.storyNavigationController.view.frame = CGRectMake(self.storyNavigationController.view.frame.origin.x,
                                                               0,
                                                               self.storyNavigationController.view.frame.size.width,
                                                               storyTitlesYCoordinate);
    }

    [UIView animateWithDuration:duration 
                          delay:0 
                        options:UIViewAnimationOptionBeginFromCurrentState | curve 
                     animations:^{
                         if (self.isHidingStory) {
                             self.shareViewController.view.frame = CGRectMake(self.storyNavigationController.view.frame.origin.x,
                                                                              vb.size.height,
                                                                              self.storyNavigationController.view.frame.size.width,
                                                                              NB_DEFAULT_SHARE_HEIGHT);
                         } else {
                             self.shareViewController.view.frame = shareViewFrame;
                             self.storyNavigationController.view.frame = storyNavigationFrame;
                         }
                         
                     } completion:^(BOOL finished) {
                         if ([notification.name isEqualToString:@"UIKeyboardWillShowNotification"]) {
                             self.storyNavigationController.view.frame = storyNavigationFrame;
                             // [self.storyDetailViewController scrolltoBottom];
                         } else {
                             // remove the shareViewController after keyboard slides down
                             if (self.isHidingStory) {
                                 self.isHidingStory = NO;
                                 [self.shareViewController.view removeFromSuperview];
                             }
                         }
                     }];
}
    
@end