ios utilities

utilities.h

#import "Utilities.h"

NSString *filePath(NSString *file) {
    return [[NSBundle mainBundle] pathForResource:[file stringByDeletingPathExtension] ofType:[file pathExtension]];
}

NSString* writablePath(NSString* file) {
    NSFileManager *fm = [NSFileManager defaultManager];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *writablePath = [documentsDirectory stringByAppendingFormat:@"/%@",file];
    
    if(![fm fileExistsAtPath:writablePath]) {
        if(![fm copyItemAtPath:filePath(file) toPath:writablePath error:nil]) {
            NSLog(@"Error copying '%@' to '%@'",filePath(file),writablePath);
        }
    }
    
    return writablePath;
}

NSURL* fileURL(NSString *file) {
    return [[NSBundle mainBundle] URLForResource:[file stringByDeletingPathExtension] withExtension:[file pathExtension]];
}

NSString *fileContent(NSString *file) {
    return [NSString stringWithContentsOfFile:filePath(file) encoding:NSUTF8StringEncoding error:nil];
}

NSString *fileContentWithEnc(NSString *file, NSString *encName) {
    return [NSString stringWithContentsOfFile:filePath(file) encoding:encodingByName(encName) error:nil];
}

NSStringEncoding encodingByName(NSString *name) {
    return CFStringConvertEncodingToNSStringEncoding(CFStringConvertIANACharSetNameToEncoding((CFStringRef)name));
}

void loadLocalFile(UIWebView *webView, NSString *fileName) {
	NSString *path = filePath(fileName);
    NSURL *url = fileURL(fileName);
	
	NSData *htmlData = [NSData dataWithContentsOfFile:path];
	
	[webView loadData:htmlData MIMEType:@"text/html" textEncodingName:@"UTF-8" baseURL:url]; 
}

void loadLocalFileWithEnc(UIWebView *webView, NSString *fileName, NSString *enc) {
	NSString *path = filePath(fileName);
    NSURL *url = fileURL(fileName);
	
	NSData *htmlData = [NSData dataWithContentsOfFile:path];
	
	[webView loadData:htmlData MIMEType:@"text/html" textEncodingName:enc baseURL:url]; 
}

void disableBouncing(UIWebView *webView) {
	for (id subview in webView.subviews)  
		if ([[subview class] isSubclassOfClass: [UIScrollView class]])   
			((UIScrollView *)subview).bounces = NO;
}

id cutPrefix(NSString *string, NSString *prefix) {
	if ([string hasPrefix:prefix]) {
		return [string substringFromIndex:[prefix length]];
	}
	return nil;
}

int sliderPosition(UISlider* slider) {
	return slider.frame.origin.x + slider.frame.size.width * slider.value / (slider.maximumValue - slider.minimumValue);
}

NSArray *lines(NSString *str) {
    return [[str stringByReplacingOccurrencesOfString:@"\r\n" withString:@"\n"] componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"\n\r"]];
}

void disableInput(UIWebView *webView) {
    UIScrollView *webViewContentView;
    for (UIView *checkView in [webView subviews] ) {
        if ([checkView isKindOfClass:[UIScrollView class]]) {
            webViewContentView = (UIScrollView*)checkView;
            break;
        }
    }
    
    for (UIView *checkView in [webViewContentView subviews] ) {
        checkView.userInteractionEnabled = NO;
    }
}