/*

     File: RootViewController.m

 Abstract: A view controller that manages a search bar and a recent searches controller.

 The view controller creates a search bar to place in a tool bar. When the user commences a search, a recent searches controller is displayed in a popover.

  Version: 1.1

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*/

#import "RootViewController.h"

@implementation RootViewController

@synthesize toolbar, samplesButton, fontFamsButton;

@synthesize samplesController, samplesPopoverController;

@synthesize fontFamsController, fontFamsPopoverController;

@synthesize coreTextScrollView;

#pragma mark -

#pragma mark Create and manage the search results controller

- (void)viewDidLoad {

    [super viewDidLoad];

    // initialize flag variable that tracks if scrollViewDidScroll is generated by user

    scrollFeedbackFromOtherControl = YES;

    // Create samples button

    samplesButton = [[UIBarButtonItem alloc] initWithTitle:@"Samples" style:UIBarButtonItemStyleBordered target:self action:@selector(samplesPopUp:)];

    // Create fontFams ("Fonts and Features") button

    fontFamsButton = [[UIBarButtonItem alloc] initWithTitle:@"Fonts" style:UIBarButtonItemStyleBordered target:self action:@selector(fontFamsPopUp:)];

    // Set buttons as items for the toolbar

    toolbar.items = [NSArray arrayWithObjects:samplesButton, fontFamsButton, nil];

    // Create and configure the samples controller

    SamplesController *aSamplesController = [[SamplesController alloc] initWithStyle:UITableViewStylePlain];

    self.samplesController = aSamplesController;

    samplesController.delegate = self;    

    // Create a navigation controller to contain the samples controller, and create the popover controller to contain the navigation controller.

    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:samplesController];

    UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:navigationController];

    self.samplesPopoverController = popover;

    samplesPopoverController.delegate = self;

    [navigationController release];

    [aSamplesController release];

    [popover release];

    // Create and configure the fontFams controller.

    FontFamsController *aFontFamsController = [[FontFamsController alloc] initWithStyle:UITableViewStyleGrouped];

    self.fontFamsController = aFontFamsController;

    fontFamsController.delegate = self;    

    // Create a navigation controller to contain the fontFams controller, and create the popover controller to contain the navigation controller.

    navigationController = [[UINavigationController alloc] initWithRootViewController:fontFamsController];

    popover = [[UIPopoverController alloc] initWithContentViewController:navigationController];

    self.fontFamsPopoverController = popover;

    fontFamsPopoverController.delegate = self;

    [navigationController release];

    [aFontFamsController release];

    [popover release];

    // Initialize our CoreTextScrollView and set the initial sample document shown

    [coreTextScrollView reset:[[[AttributedStringDoc alloc] initWithFileNameFromBundle:@"Splash.xml"] autorelease] withDelegate:self];

    samplesController.selectedSample = @"Splash.xml";

}

#pragma mark -

#pragma mark Samples controller related methods

- (void)samplesPopUp:(id)sender {   

    // Present the samples popover

    [self.fontFamsPopoverController dismissPopoverAnimated:NO];

    [samplesPopoverController presentPopoverFromBarButtonItem:samplesButton permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

}

- (void)samplesController:(SamplesController *)controller didSelectString:(NSString *)sampleFileName {    

    // The user selected a row in the samples list, so load the specified sample document

    [coreTextScrollView reset:[[[AttributedStringDoc alloc] initWithFileNameFromBundle:sampleFileName] autorelease] withDelegate:self];

    // Dismiss the samples popover

    [self.samplesPopoverController dismissPopoverAnimated:YES];

    // Clear out selected font in fontFamsController as the new sample will

    // initially use the font and styles from the sample document data 

    [self.fontFamsController deselectAllFonts];

}

#pragma mark -

#pragma mark FontFams controller and methods

- (void)fontFamsPopUp:(id)sender {

    // Present the fontFams popover

    [self.samplesPopoverController dismissPopoverAnimated:NO];

    [fontFamsPopoverController presentPopoverFromBarButtonItem:fontFamsButton permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];

}

- (void)fontFamsController:(FontFamsController *)controller didSelectString:(NSString *)fontFamilyName {

    // The user selected a row in the font families list, so update our 

    // CoreTextScrollView with the new override font

    [coreTextScrollView fontFamilyChange:fontFamilyName];

    [self.fontFamsPopoverController dismissPopoverAnimated:YES];

}

- (void)fontFamsController:(FontFamsController *)controller didSelectFeaturesString:(NSString *)fontFeatureName {

    // The user selected a row in the font families features list, so update our

    // CoreTextScrollView with the new font feature.  Note that for simplicity we

    // only set one font feature at a time.

    [coreTextScrollView optionsChange:fontFeatureName];

    [self.fontFamsPopoverController dismissPopoverAnimated:YES];

}

#pragma mark -

#pragma mark View lifecycle

- (BOOL)shouldAutorotate {

    return YES;

}

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {

    // Rotation will generate a scrollViewDidScroll - we want to ignore this    

    scrollFeedbackFromOtherControl = YES; 

}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation {

    // Refresh the core text document layout to reflect the new orientation

    [self.coreTextScrollView relayoutDoc];

}

#pragma mark -

#pragma mark Memory management

- (void)dealloc {    

    [samplesButton release];

    [fontFamsButton release];

    [toolbar release];

    [super dealloc];

}

#pragma mark -

#pragma mark CoreTextScrollView delegate methods

- (void)scrollViewDidScroll:(UIScrollView *)sender {

    // scrollViewDidScroll gets called from multiple reasons (if view is tied to a UIPageControl,

    // when the screen is rotated, when resizing the scrollview) and we are only interested in

    // changing the page when the user actually scrolled the view

    if (scrollFeedbackFromOtherControl) {

        // do nothing - the scroll was initiated from a control or user action that is not user dragging

        return;

    }   

    // Switch the page when more than 50% of the previous/next page is visible

    CGFloat pageWidth = coreTextScrollView.frame.size.width;

    NSInteger page = floor((coreTextScrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;

    [coreTextScrollView setPage:page];

}

- (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView

{

    // Switch the page when more than 50% of the previous/next page is visible

    CGFloat pageWidth = coreTextScrollView.frame.size.width;

    NSInteger page = floor((coreTextScrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;

    [coreTextScrollView setPage:page];

}

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {

    // At the begin of scroll dragging, reset the boolean used when scrolls 

    // originate from something other than user dragging

    scrollFeedbackFromOtherControl = NO;

}

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {

    // At the end of scroll animation, reset the boolean used when scrolls 

    // originate from something other than user dragging

    scrollFeedbackFromOtherControl = YES;

}

// NOTE: Search functionality which was present in an earlier verison of this

// sample was removed to simplify the sample focus.  There will be separate

// samples that demonstrate search functionality, however the following

// commented-out method from the previous version shows one way of searching

// the text using either NSRegularExpression or NSString:rangeOfString.

#ifdef SEARCH_EXAMPLE_FROM_PREVIOUS_VERSION

- (void)finishSearchWithString:(NSString *)searchString {

    // Conduct the search. In this case, simply report the search term used.

    [recentSearchesPopoverController dismissPopoverAnimated:YES];

    // Clear out any current selection range

    [coreTextScrollView clearSelectionRanges];

    // Grab the current document text

    NSString* docString = coreTextScrollView.document.attributedString.string;

#if __IPHONE_OS_VERSION_MIN_REQUIRED >= 40000

    NSError *error = nil;

    // Use a NSRegularExpression to search the full document text

    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:searchString options:NSRegularExpressionCaseInsensitive error:&error];

    if (regex) {

        // Enumerate over document text using a block, updating found ranges to selection set

        [regex enumerateMatchesInString:docString options:0 range:NSMakeRange(0, [docString length]) usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {

            [coreTextScrollView addSelectionRange:[result range]];

        }];

    }

#else

    // NSRegularExpression not available prior to iOS 4, so use standard NSString:rangeOfString searching

    NSRange searchRange = NSMakeRange(0, docString.length);

    while (searchRange.length > 0) {

        // Walk document text looking for search expression, adding found ranges to selection set

        NSRange foundRange = [docString rangeOfString:searchString options:(NSCaseInsensitiveSearch|NSRegularExpressionSearch) range:searchRange];

        if (foundRange.length) {

            [coreTextScrollView addSelectionRange:foundRange];

            searchRange.location = foundRange.location + foundRange.length;

            searchRange.length =  docString.length - searchRange.location;

        }

        else {

            break;

        }

    }

#endif

    [coreTextScrollView refreshDoc];

    [searchBar resignFirstResponder];

}

#endif // SEARCH_EXAMPLE_FROM_PREVIOUS_VERSION

@end