DEComposeViewController.m

    //
    //  DEComposeViewController.m
    //  DEer
    //
    //  Copyright (c) 2011-2012 Double Encore, Inc. All rights reserved.
    //
    //  Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
    //  Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
    //  Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer 
    //  in the documentation and/or other materials provided with the distribution. Neither the name of the Double Encore Inc. nor the names of its 
    //  contributors may be used to endorse or promote products derived from this software without specific prior written permission.
    //  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
    //  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS 
    //  BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 
    //  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
    //  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    //

#import "DEComposeViewController.h"
#import "DESheetCardView.h"
#import "DETextView.h"
#import "DEGradientView.h"
#import "UIDevice+DEComposeViewController.h"
#import <QuartzCore/QuartzCore.h>
#import <CoreLocation/CoreLocation.h>



@interface DEComposeViewController ()

@property (nonatomic, copy) NSString *text;
@property (nonatomic, retain) NSMutableArray *images;
@property (nonatomic, retain) NSMutableArray *urls;
@property (nonatomic, retain) NSArray *attachmentFrameViews;
@property (nonatomic, retain) NSArray *attachmentImageViews;
@property (nonatomic) UIStatusBarStyle previousStatusBarStyle;
@property (nonatomic, assign) UIViewController *fromViewController;
@property (nonatomic, retain) UIImageView *backgroundImageView;
@property (nonatomic, retain) DEGradientView *gradientView;
@property (nonatomic, retain) UIPickerView *accountPickerView;
@property (nonatomic, retain) UIPopoverController *accountPickerPopoverController;
@property (nonatomic, retain) id twitterAccount;  // iOS 5 use only.

- (void)tweetComposeViewControllerInit;
- (void)updateFramesForOrientation:(UIInterfaceOrientation)interfaceOrientation;
- (BOOL)isPresented;
- (NSInteger)attachmentsCount;
- (void)updateAttachments;
- (UIImage*)captureScreen;

@end


@implementation DEComposeViewController

    // IBOutlets
@synthesize cardView = _cardView;
@synthesize titleLabel = _titleLabel;
@synthesize locationLabel = _locationLabel;
@synthesize cancelButton = _cancelButton;
@synthesize sendButton = _sendButton;
@synthesize locButton = _locButton;
@synthesize cardHeaderLineView = _cardHeaderLineView;
@synthesize textView = _textView;
@synthesize textViewContainer = _textViewContainer;
@synthesize paperClipView = _paperClipView;
@synthesize attachment1FrameView = _attachment1FrameView;
@synthesize attachment2FrameView = _attachment2FrameView;
@synthesize attachment3FrameView = _attachment3FrameView;
@synthesize attachment1ImageView = _attachment1ImageView;
@synthesize attachment2ImageView = _attachment2ImageView;
@synthesize attachment3ImageView = _attachment3ImageView;
@synthesize characterCountLabel = _characterCountLabel;

    // Public
@synthesize completionHandler = _completionHandler;
@synthesize alwaysUseDETwitterCredentials = _alwaysUseDETwitterCredentials;

    // Private
@synthesize text = _text;
@synthesize images = _images;
@synthesize urls = _urls;
@synthesize attachmentFrameViews = _attachmentFrameViews;
@synthesize attachmentImageViews = _attachmentImageViews;
@synthesize previousStatusBarStyle = _previousStatusBarStyle;
@synthesize fromViewController = _fromViewController;
@synthesize backgroundImageView = _backgroundImageView;
@synthesize gradientView = _gradientView;
@synthesize accountPickerView = _accountPickerView;
@synthesize accountPickerPopoverController = _accountPickerPopoverController;
@synthesize twitterAccount = _twitterAccount;
@synthesize locationManager = _locationManager;
@synthesize bestEffortAtLocation = _bestEffortAtLocation;
@synthesize stateString = _stateString;
@synthesize latString = _latString;
@synthesize lonString = _lonString;
@synthesize showCoordinates = _showCoordinates;

enum {
    DEComposeViewControllerNoAccountsAlert = 1,
    DEComposeViewControllerCannotSendAlert
};

NSInteger const DEURLLength = 20;  // https://dev.twitter.com/docs/tco-url-wrapper
NSInteger const DEMaxImages = 1;  // We'll get this dynamically later, but not today.
static NSString * const DELastAccountIdentifier = @"DELastAccountIdentifier";

#define degreesToRadians(x) (M_PI * x / 180.0f)


#pragma mark - Class Methods


- (UIImage *) captureScreen {
    UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
    CGRect rect = [keyWindow bounds];
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    
    if (![[UIApplication sharedApplication] isStatusBarHidden]) {
        CGFloat statusBarOffset = -20.0f;
        if ( UIInterfaceOrientationIsLandscape([[UIApplication sharedApplication]statusBarOrientation]))
        {
            CGContextTranslateCTM(context,statusBarOffset, 0.0f);

        }else
        {
            CGContextTranslateCTM(context, 0.0f, statusBarOffset);
        }
    }
    
    [keyWindow.layer renderInContext:context];   
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    UIImageOrientation imageOrientation;
    switch ([UIApplication sharedApplication].statusBarOrientation) {
        case UIInterfaceOrientationLandscapeLeft:
            imageOrientation = UIImageOrientationRight;
            break;
        case UIInterfaceOrientationLandscapeRight:
            imageOrientation = UIImageOrientationLeft;
            break;
        case UIInterfaceOrientationPortrait:
            imageOrientation = UIImageOrientationUp;
            break;
        case UIInterfaceOrientationPortraitUpsideDown:
            imageOrientation = UIImageOrientationDown;
            break;
        default:
            break;
    }
    
    UIImage *outputImage = [[[UIImage alloc] initWithCGImage: image.CGImage
                                                      scale: 1.0
                                                orientation: imageOrientation] autorelease];
    return outputImage;
}

#pragma mark - Setup & Teardown


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        [self tweetComposeViewControllerInit];
    }
    return self;
}


- (id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self) {
        [self tweetComposeViewControllerInit];
    }
    return self;
}


- (void)tweetComposeViewControllerInit
{
    _images = [[NSMutableArray alloc] init];
    _urls = [[NSMutableArray alloc] init];
}


- (void)dealloc
{
        // IBOutlets
    [_cardView release], _cardView = nil;
    [_titleLabel release], _titleLabel = nil;
    [_locationLabel release], _locationLabel = nil;
    [_cancelButton release], _cancelButton = nil;
    [_sendButton release], _sendButton = nil;
    [_locButton release], _locButton = nil;
    [_cardHeaderLineView release], _cardHeaderLineView = nil;
    [_textView release], _textView = nil;
    [_textViewContainer release], _textViewContainer = nil;
    [_paperClipView release], _paperClipView = nil;
    [_attachment1FrameView release], _attachment1FrameView = nil;
    [_attachment2FrameView release], _attachment2FrameView = nil;
    [_attachment3FrameView release], _attachment3FrameView = nil;
    [_attachment1ImageView release], _attachment1ImageView = nil;
    [_attachment2ImageView release], _attachment2ImageView = nil;
    [_attachment3ImageView release], _attachment3ImageView = nil;
    [_characterCountLabel release], _characterCountLabel = nil;
    
        // Public
    [_completionHandler release], _completionHandler = nil;
    
        // Private
    [_text release], _text = nil;
    [_images release], _images = nil;
    [_urls release], _urls = nil;
    [_attachmentFrameViews release], _attachmentFrameViews = nil;
    [_attachmentImageViews release], _attachmentImageViews = nil;
    [_backgroundImageView release], _backgroundImageView = nil;
    [_gradientView release], _gradientView = nil;
    [_locationManager release], _locationManager = nil;
    [_bestEffortAtLocation release], _bestEffortAtLocation = nil;
    [_stateString release], _stateString = nil;
    [_latString release], _latString = nil;
    [_lonString release], _lonString = nil;
    
    [super dealloc];
}


#pragma mark - Superclass Overrides

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor clearColor];
    self.textViewContainer.backgroundColor = [UIColor clearColor];
    self.textView.backgroundColor = [UIColor clearColor];
    
    if ([UIDevice de_isIOS5]) {
        self.fromViewController = self.presentingViewController;
        self.textView.keyboardType = UIKeyboardTypeTwitter;
    }
    else {
        self.fromViewController = self.parentViewController;
    }
    
        // Put the attachment frames and image views into arrays so they're easier to work with.
        // Order is important, so we can't use IB object arrays. Or at least this is easier.
    self.attachmentFrameViews = [NSArray arrayWithObjects:
                                 self.attachment1FrameView,
                                 self.attachment2FrameView,
                                 self.attachment3FrameView,
                                 nil];
    
    self.attachmentImageViews = [NSArray arrayWithObjects:
                                 self.attachment1ImageView,
                                 self.attachment2ImageView,
                                 self.attachment3ImageView,
                                 nil];
    
        // Now add some angle to attachments 2 and 3.
    self.attachment2FrameView.transform = CGAffineTransformMakeRotation(degreesToRadians(-6.0f));
    self.attachment2ImageView.transform = CGAffineTransformMakeRotation(degreesToRadians(-6.0f));
    self.attachment3FrameView.transform = CGAffineTransformMakeRotation(degreesToRadians(-12.0f));
    self.attachment3ImageView.transform = CGAffineTransformMakeRotation(degreesToRadians(-12.0f));
    
        // Mask the corners on the image views so they don't stick out of the frame.
    [self.attachmentImageViews enumerateObjectsUsingBlock:^(id obj, NSUInteger index, BOOL *stop) {
        ((UIImageView *)obj).layer.cornerRadius = 3.0f;
        ((UIImageView *)obj).layer.masksToBounds = YES;
    }];
    
    self.textView.text = self.text;
    [self.textView becomeFirstResponder];
    
    [self updateAttachments];
    
    self.latString = nil;
    self.lonString = nil;
    
    // default to add current location
    self.locationManager = [[CLLocationManager alloc] init];
    [self startUpdatingLocation];
}


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

        // Take a snapshot of the current view, and make that our background after our view animates into place.
        // This only works if our orientation is the same as the presenting view.
        // If they don't match, just display the gray background.
    if (self.interfaceOrientation == self.fromViewController.interfaceOrientation) {
        UIImage *backgroundImage = [self captureScreen];
        self.backgroundImageView = [[[UIImageView alloc] initWithImage:backgroundImage] autorelease];
    }
    else {
        self.backgroundImageView = [[[UIImageView alloc] initWithFrame:self.fromViewController.view.bounds] autorelease];
    }
    self.backgroundImageView.autoresizingMask = UIViewAutoresizingNone;
    self.backgroundImageView.alpha = 0.0f;
    self.backgroundImageView.backgroundColor = [UIColor lightGrayColor];
    [self.view insertSubview:self.backgroundImageView atIndex:0];
    
        // Now let's fade in a gradient view over the presenting view.
    self.gradientView = [[[DEGradientView alloc] initWithFrame:[UIApplication sharedApplication].keyWindow.bounds] autorelease];
    self.gradientView.autoresizingMask = UIViewAutoresizingNone;
    self.gradientView.transform = self.fromViewController.view.transform;
    self.gradientView.alpha = 0.0f;
    self.gradientView.center = [UIApplication sharedApplication].keyWindow.center;
    [self.fromViewController.view addSubview:self.gradientView];
    [UIView animateWithDuration:0.3f
                     animations:^ {
                         self.gradientView.alpha = 1.0f;
                     }];    
    
    self.previousStatusBarStyle = [UIApplication sharedApplication].statusBarStyle;
    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackOpaque animated:YES]; 
    
    [self updateFramesForOrientation:self.interfaceOrientation];
    
}


- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    
    self.backgroundImageView.alpha = 1.0f;
    //self.backgroundImageView.frame = [self.view convertRect:self.backgroundImageView.frame fromView:[UIApplication sharedApplication].keyWindow];
    [self.view insertSubview:self.gradientView aboveSubview:self.backgroundImageView];
}


- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    
    UIView *presentingView = [UIDevice de_isIOS5] ? self.fromViewController.view : self.parentViewController.view;
    [presentingView addSubview:self.gradientView];
    
    [self.backgroundImageView removeFromSuperview];
    self.backgroundImageView = nil;
    
    [UIView animateWithDuration:0.3f
                     animations:^ {
                         self.gradientView.alpha = 0.0f;
                     }
                     completion:^(BOOL finished) {
                         [self.gradientView removeFromSuperview];
                     }];
    
    [[UIApplication sharedApplication] setStatusBarStyle:self.previousStatusBarStyle animated:YES];
    
    if (kCLAuthorizationStatusAuthorized == [CLLocationManager authorizationStatus]) 
        [self stopUpdatingLocation:NSLocalizedString(@"Quit", @"Quit")];
    
}


- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    if ([self.parentViewController respondsToSelector:@selector(shouldAutorotateToInterfaceOrientation:)]) {
        return [self.parentViewController shouldAutorotateToInterfaceOrientation:interfaceOrientation];
    }
    
    if ([UIDevice de_isPhone]) {
        return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
    }

    return YES;  // Default for iPad.
}


- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation duration:(NSTimeInterval)duration
{
    [self updateFramesForOrientation:interfaceOrientation];
    self.accountPickerView.alpha = 0.0f;
    
        // Our fake background won't rotate properly. Just hide it.
    if (interfaceOrientation == self.presentedViewController.interfaceOrientation) {
        self.backgroundImageView.alpha = 1.0f;
    }
    else {
        self.backgroundImageView.alpha = 0.0f;
    }
}


- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
}


- (void)viewDidUnload
{
        // Keep:
        //  _completionHandler
        //  _text
        //  _images
        //  _urls
        //  _twitterAccount
    
        // Save the text.
    self.text = self.textView.text;
    
        // IBOutlets
    self.cardView = nil;
    self.titleLabel = nil;
    self.locationLabel = nil;
    self.cancelButton = nil;
    self.sendButton = nil;
    self.locButton = nil;
    self.cardHeaderLineView = nil;
    self.textView = nil;
    self.textViewContainer = nil;
    self.paperClipView = nil;
    self.attachment1FrameView = nil;
    self.attachment2FrameView = nil;
    self.attachment3FrameView = nil;
    self.attachment1ImageView = nil;
    self.attachment2ImageView = nil;
    self.attachment3ImageView = nil;
    self.characterCountLabel = nil;
    
        // Private
    self.attachmentFrameViews = nil;
    self.attachmentImageViews = nil;
    self.gradientView = nil;
    self.accountPickerView = nil;
    self.accountPickerPopoverController = nil;
    self.locationManager = nil;
    self.bestEffortAtLocation = nil;
    self.stateString = nil;
    self.latString = nil;
    self.lonString = nil;
    
    [super viewDidUnload];
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
    // switch to on very first time
    UIImage *locOnButtonImage = [[UIImage imageNamed:@"location_arrow_on"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
    
    if (kCLAuthorizationStatusAuthorized == [CLLocationManager authorizationStatus])
        [self.locButton setImage:locOnButtonImage forState:UIControlStateNormal];
    
    if (self.bestEffortAtLocation == nil || self.bestEffortAtLocation.horizontalAccuracy > newLocation.horizontalAccuracy) {
        self.bestEffortAtLocation = newLocation;
    }
    NSString *textLatString = (self.bestEffortAtLocation.coordinate.latitude < 0) ? NSLocalizedString(@"S", @"S") : NSLocalizedString(@"N", @"N");
    NSString *textLonString = (self.bestEffortAtLocation.coordinate.longitude < 0) ? NSLocalizedString(@"W", @"W") : NSLocalizedString(@"E", @"E");
    NSString *coordinateString = [NSString stringWithFormat:@"%g\u00B0 %@, %g\u00B0 %@",fabs(newLocation.coordinate.latitude), textLatString, fabs(newLocation.coordinate.longitude), textLonString];
    //check if meet the requirement
    if (newLocation.horizontalAccuracy <= self.locationManager.desiredAccuracy) {
        [self stopUpdatingLocation:NSLocalizedString(@"Acquired Location", @"Acquired Location")];
        [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(stopUpdatingLocation:) object:nil];
    }
    if (self.showCoordinates)
        self.locationLabel.text = coordinateString;
    
    self.latString = [NSString stringWithFormat:@"%f", self.bestEffortAtLocation.coordinate.latitude];
    self.lonString = [NSString stringWithFormat:@"%f", self.bestEffortAtLocation.coordinate.longitude];
}

-(void)startUpdatingLocation {    
    self.locationManager.delegate = self;
    self.locationManager.distanceFilter = kCLDistanceFilterNone;
    self.locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
    [self.locationManager startUpdatingLocation];
    NSLog(@"start updating");
//    [self performSelector:@selector(stopUpdatingLocation:) withObject:@"Timed Out" afterDelay:20.0f];
}

- (void)stopUpdatingLocation:(NSString *)state {
    self.stateString = state;
    [self.locationManager stopUpdatingLocation];
    self.locationManager.delegate = nil;
    NSLog(@"stop updating %@", state);
    
}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    // The location "unknown" error simply means the manager is currently unable to get the location.
    // We can ignore this error for the scenario of getting a single location fix, because we already have a
    // timeout that will stop the location manager to save power.
    if ([error code] != kCLErrorLocationUnknown) {
        [self stopUpdatingLocation:NSLocalizedString(@"Error", @"Error")];
    }
}

#pragma mark - Public

- (BOOL)setInitialText:(NSString *)initialText
{
    if ([self isPresented]) {
        return NO;
    }
    
    self.text = initialText;  // Keep a copy in case the view isn't loaded yet.
    self.textView.text = self.text;
    
    return YES;
}


- (BOOL)addImage:(UIImage *)image
{
    if (image == nil) {
        return NO;
    }
    
    if ([self isPresented]) {
        return NO;
    }
    
    if ([self.images count] >= DEMaxImages) {
        return NO;
    }
    
    if ([self attachmentsCount] >= 3) {
        return NO;  // Only three allowed.
    }
    
    [self.images addObject:image];
    return YES;
}


- (BOOL)addImageWithURL:(NSURL *)url;
    // Not yet impelemented.
{
        // We should probably just start the download, rather than saving the URL.
        // Just save the image once we have it.
    return NO;
}


- (BOOL)removeAllImages
{
    if ([self isPresented]) {
        return NO;
    }
    
    [self.images removeAllObjects];
    return YES;
}


- (BOOL)addURL:(NSURL *)url
{
    if (url == nil) {
        return NO;
    }
    
    if ([self isPresented]) {
        return NO;
    }
    
    if ([self attachmentsCount] >= 3) {
        return NO;  // Only three allowed.
    }
    
    [self.urls addObject:url];
    return YES;
}


- (BOOL)removeAllURLs
{
    if ([self isPresented]) {
        return NO;
    }
    
    [self.urls removeAllObjects];
    return YES;
}


#pragma mark - Private

- (void)updateFramesForOrientation:(UIInterfaceOrientation)interfaceOrientation
{    
    CGFloat buttonHorizontalMargin = 8.0f;
    CGFloat cardWidth, cardTop, cardHeight, cardHeaderLineTop, buttonTop;
    UIImage *cancelButtonImage, *sendButtonImage;
    CGFloat titleLabelFontSize, titleLabelTop;
    CGFloat characterCountLeft, characterCountTop;
    
    UIImage *locOnButtonImage = [[UIImage imageNamed:@"location_arrow_on"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
    UIImage *locOffButtonImage = [[UIImage imageNamed:@"location_arrow_off"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
    
    if ([UIDevice de_isPhone]) {
        cardWidth = CGRectGetWidth(self.view.bounds) - 10.0f;
        if (UIInterfaceOrientationIsPortrait(interfaceOrientation)) {
            cardTop = 25.0f;
            cardHeight = 189.0f;
            buttonTop = 7.0f;
            cancelButtonImage = [[UIImage imageNamed:@"DECancelButtonPortrait"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
            sendButtonImage = [[UIImage imageNamed:@"DESendButtonPortrait"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
            cardHeaderLineTop = 41.0f;
            titleLabelFontSize = 20.0f;
            titleLabelTop = 9.0f;
        }
        else {
            cardTop = -1.0f;
            cardHeight = 150.0f;
            buttonTop = 6.0f;
            cancelButtonImage = [[UIImage imageNamed:@"DECancelButtonLandscape"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
            sendButtonImage = [[UIImage imageNamed:@"DESendButtonLandscape"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
            cardHeaderLineTop = 32.0f;
            titleLabelFontSize = 17.0f;
            titleLabelTop = 5.0f;
        }
    }
    else {  // iPad. Similar to iPhone portrait.
        cardWidth = 543.0f;
        cardHeight = 189.0f;
        buttonTop = 7.0f;
        cancelButtonImage = [[UIImage imageNamed:@"DECancelButtonPortrait"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
        sendButtonImage = [[UIImage imageNamed:@"DESendButtonPortrait"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
        cardHeaderLineTop = 41.0f;
        titleLabelFontSize = 20.0f;
        titleLabelTop = 9.0f;
        if (UIInterfaceOrientationIsPortrait(interfaceOrientation)) {
            cardTop = 280.0f;
        }
        else {
            cardTop = 110.0f;
        }
    }
    
    CGFloat cardLeft = trunc((CGRectGetWidth(self.view.bounds) - cardWidth) / 2);
    self.cardView.frame = CGRectMake(cardLeft, cardTop, cardWidth, cardHeight);
    
    self.titleLabel.font = [UIFont boldSystemFontOfSize:titleLabelFontSize];
    self.titleLabel.frame = CGRectMake(0.0f, titleLabelTop, cardWidth, self.titleLabel.frame.size.height);
    
    [self.cancelButton setBackgroundImage:cancelButtonImage forState:UIControlStateNormal];
    self.cancelButton.frame = CGRectMake(buttonHorizontalMargin, buttonTop, self.cancelButton.frame.size.width, cancelButtonImage.size.height);
    
    [self.sendButton setBackgroundImage:sendButtonImage forState:UIControlStateNormal];
    self.sendButton.frame = CGRectMake(self.cardView.bounds.size.width - buttonHorizontalMargin - self.sendButton.frame.size.width, buttonTop, self.sendButton.frame.size.width, sendButtonImage.size.height);
    
    if (kCLAuthorizationStatusAuthorized != [CLLocationManager authorizationStatus]) {
        [self.locButton setImage:locOffButtonImage forState:UIControlStateNormal];
    }
    else {
        [self.locButton setImage:locOnButtonImage forState:UIControlStateNormal];
    }
    
    self.cardHeaderLineView.frame = CGRectMake(0.0f, cardHeaderLineTop, self.cardView.bounds.size.width, self.cardHeaderLineView.frame.size.height);
    
    CGFloat textWidth = CGRectGetWidth(self.cardView.bounds);
    if ([self attachmentsCount] > 0) {
        textWidth -= CGRectGetWidth(self.attachment1FrameView.frame) + 10.0f;  // Got to measure frame 1, because it's not rotated. Other frames are funky.
    }
    CGFloat textTop = CGRectGetMaxY(self.cardHeaderLineView.frame) - 1.0f;
    CGFloat textHeight = self.cardView.bounds.size.height - textTop - 30.0f;
    self.textViewContainer.frame = CGRectMake(0.0f, textTop, self.cardView.bounds.size.width, textHeight);
    self.textView.frame = CGRectMake(0.0f, 0.0f, textWidth, self.textViewContainer.frame.size.height);
    self.textView.scrollIndicatorInsets = UIEdgeInsetsMake(0.0f, 0.0f, 0.0f, -(self.cardView.bounds.size.width - textWidth - 1.0f));
    
    self.paperClipView.frame = CGRectMake(CGRectGetMaxX(self.cardView.frame) - self.paperClipView.frame.size.width + 6.0f,
                                          CGRectGetMinY(self.cardView.frame) + CGRectGetMaxY(self.cardHeaderLineView.frame) - 1.0f,
                                          self.paperClipView.frame.size.width,
                                          self.paperClipView.frame.size.height);
    
        // We need to position the rotated views by their center, not their frame.
        // This isn't elegant, but it is correct. Half-points are required because
        // some frame sizes aren't evenly divisible by 2.
    self.attachment1FrameView.center = CGPointMake(self.cardView.bounds.size.width - 45.0f, CGRectGetMaxY(self.paperClipView.frame) - cardTop + 18.0f);
    self.attachment1ImageView.center = CGPointMake(self.cardView.bounds.size.width - 45.5, self.attachment1FrameView.center.y - 2.0f);
    
    self.attachment2FrameView.center = CGPointMake(self.attachment1FrameView.center.x - 4.0f, self.attachment1FrameView.center.y + 5.0f);
    self.attachment2ImageView.center = CGPointMake(self.attachment1ImageView.center.x - 4.0f, self.attachment1ImageView.center.y + 5.0f);
    
    self.attachment3FrameView.center = CGPointMake(self.attachment2FrameView.center.x - 4.0f, self.attachment2FrameView.center.y + 5.0f);
    self.attachment3ImageView.center = CGPointMake(self.attachment2ImageView.center.x - 4.0f, self.attachment2ImageView.center.y + 5.0f);
    
    characterCountLeft = CGRectGetWidth(self.cardView.frame) - CGRectGetWidth(self.characterCountLabel.frame) - 12.0f;
    characterCountTop = CGRectGetHeight(self.cardView.frame) - CGRectGetHeight(self.characterCountLabel.frame) - 8.0f;
    if ([UIDevice de_isPhone]) {
        if (UIInterfaceOrientationIsLandscape(interfaceOrientation)) {
            characterCountTop -= 5.0f;
            if ([self attachmentsCount] > 0) {
                characterCountLeft -= CGRectGetWidth(self.attachment3FrameView.frame) - 15.0f;
            }
        }
    }
    self.characterCountLabel.frame = CGRectMake(characterCountLeft, characterCountTop, self.characterCountLabel.frame.size.width, self.characterCountLabel.frame.size.height);
    
    self.gradientView.frame = self.gradientView.superview.bounds;
}


- (BOOL)isPresented
{
    return [self isViewLoaded];
}

- (NSInteger)attachmentsCount
{
    return [self.images count] + [self.urls count];
}


- (void)updateAttachments
{
    CGRect frame = self.textView.frame;
    if ([self attachmentsCount] > 0) {
        frame.size.width = self.cardView.frame.size.width - self.attachment1FrameView.frame.size.width;
    }
    else {
        frame.size.width = self.cardView.frame.size.width;
    }
    self.textView.frame = frame;
    
        // Create a array of attachment images to display.
    NSMutableArray *attachmentImages = [NSMutableArray arrayWithArray:self.images];
    for (NSInteger index = 0; index < [self.urls count]; index++) {
        [attachmentImages addObject:[UIImage imageNamed:@"DEURLAttachment"]];
    }
    
    self.paperClipView.hidden = YES;
    self.attachment1FrameView.hidden = YES;
    self.attachment2FrameView.hidden = YES;
    self.attachment3FrameView.hidden = YES;
    
    if ([attachmentImages count] >= 1) {
        self.paperClipView.hidden = NO;
        self.attachment1FrameView.hidden = NO;
        self.attachment1ImageView.image = [attachmentImages objectAtIndex:0];
        
        if ([attachmentImages count] >= 2) {
            self.paperClipView.hidden = NO;
            self.attachment2FrameView.hidden = NO;
            self.attachment2ImageView.image = [attachmentImages objectAtIndex:1];
            
            if ([attachmentImages count] >= 3) {
                self.paperClipView.hidden = NO;
                self.attachment3FrameView.hidden = NO;
                self.attachment3ImageView.image = [attachmentImages objectAtIndex:2];
            }
        }
    }
}

#pragma mark - UITextViewDelegate

- (void)textViewDidChange:(UITextView *)textView
{
}


#pragma mark - DETextViewDelegate

- (void)tweetTextViewAccountButtonWasTouched:(DETextView *)tweetTextView
{
}


#pragma mark - Actions

- (IBAction)send
{
    self.sendButton.enabled = NO;
    
    if (self.completionHandler) {
        if ([self.images count])
            self.completionHandler(DEComposeViewControllerResultDone, self.textView.text, [self.images objectAtIndex:0], self.latString, self.lonString);
        else
            self.completionHandler(DEComposeViewControllerResultDone, self.textView.text, nil, self.latString, self.lonString);
    }
    else {
        [self dismissModalViewControllerAnimated:YES];
    }
}


- (IBAction)cancel
{
    if (self.completionHandler) {
        self.completionHandler(DEComposeViewControllerResultCancelled, @"", nil, nil, nil);
    }
    else {
        [self dismissModalViewControllerAnimated:YES];
    }
}


- (IBAction)toggleLocButtonImage:(id)sender
{    
    UIImage *locOnButtonImage = [[UIImage imageNamed:@"location_arrow_on"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];
    UIImage *locOffButtonImage = [[UIImage imageNamed:@"location_arrow_off"] stretchableImageWithLeftCapWidth:4 topCapHeight:0];

    // default is adding current location
    
    if (kCLAuthorizationStatusAuthorized == [CLLocationManager authorizationStatus]) {
        if ([sender isSelected]) {
            [sender setImage:locOnButtonImage forState:UIControlStateNormal];
            [sender setSelected:NO];
            [self startUpdatingLocation];
        }
        else {
            [sender setImage:locOffButtonImage forState:UIControlStateSelected];
            [sender setSelected:YES];
            [self stopUpdatingLocation:NSLocalizedString(@"Manually Stop", @"Manually Stop")];
            self.locationLabel.text = nil;
            self.latString = nil;
            self.lonString = nil;
        }
    }
    
    else {
        if ([sender isSelected]) {
            [sender setImage:locOffButtonImage forState:UIControlStateNormal];
            [sender setSelected:NO];
            self.locationLabel.text = nil;
            self.latString = nil;
            self.lonString = nil;
        }
        else {
            UIAlertView *servicesDisabledAlert = [[UIAlertView alloc] initWithTitle:@"Location Services Disabled"
                                                                            message:[NSString stringWithFormat:@"Please turn on the location services in the settings to add location."]
                                                                           delegate:nil
                                                                  cancelButtonTitle:@"OK"
                                                                  otherButtonTitles:nil];
            [servicesDisabledAlert show];
            self.locationLabel.text = nil;
            self.latString = nil;
            self.lonString = nil;
        }
    }
}

#pragma mark - UIAlertViewDelegate

+ (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
    // Notice this is a class method since we're displaying the alert from a class method.
{
    // no op
}


- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
    // This gets called if there's an error sending the tweet.
{
    if (alertView.tag == DEComposeViewControllerNoAccountsAlert) {
        [self dismissModalViewControllerAnimated:YES];
    }
    else if (alertView.tag == DEComposeViewControllerCannotSendAlert) {
        if (buttonIndex == 1) {
                // The user wants to try again.
            [self send];
        }
    }
}


@end