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270 lines
No EOL
11 KiB
Objective-C
270 lines
No EOL
11 KiB
Objective-C
//
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// Utilities.m
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// NewsBlur
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//
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// Created by Samuel Clay on 10/17/11.
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// Copyright (c) 2011 NewsBlur. All rights reserved.
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//
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#import "Utilities.h"
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#import <CommonCrypto/CommonCrypto.h>
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void drawLinearGradient(CGContextRef context, CGRect rect, CGColorRef startColor,
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CGColorRef endColor) {
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CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
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CGFloat locations[] = { 0.0, 1.0 };
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NSArray *colors = [NSArray arrayWithObjects:(__bridge id)startColor, (__bridge id)endColor, nil];
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CGGradientRef gradient = CGGradientCreateWithColors(colorSpace,
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(__bridge CFArrayRef) colors, locations);
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CGPoint startPoint = CGPointMake(CGRectGetMidX(rect), CGRectGetMinY(rect));
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CGPoint endPoint = CGPointMake(CGRectGetMidX(rect), CGRectGetMaxY(rect));
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CGContextSaveGState(context);
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CGContextAddRect(context, rect);
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CGContextClip(context);
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CGContextDrawLinearGradient(context, gradient, startPoint, endPoint, 0);
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CGContextRestoreGState(context);
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CGGradientRelease(gradient);
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CGColorSpaceRelease(colorSpace);
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}
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@implementation Utilities
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static NSMutableDictionary *imageCache;
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+ (void)saveImage:(UIImage *)image feedId:(NSString *)filename {
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if (!imageCache) {
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imageCache = [NSMutableDictionary dictionary];
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}
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// Save image to memory-based cache, for performance when reading.
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// NSLog(@"Saving %@", [imageCache allKeys]);
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if (image && [filename class] != [NSNull class]) {
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[imageCache setObject:image forKey:filename];
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} else {
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// NSLog(@"%@ has no image!!!", filename);
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}
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}
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+ (UIImage *)getImage:(NSString *)filename {
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return [self getImage:filename isSocial:NO];
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}
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+ (UIImage *)getImage:(NSString *)filename isSocial:(BOOL)isSocial {
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UIImage *image;
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if (filename && [[imageCache allKeys] containsObject:filename]) {
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image = [imageCache objectForKey:filename];
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}
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if (!image || [image class] == [NSNull class]) {
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// Image not in cache, search on disk.
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NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
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NSString *cacheDirectory = [paths objectAtIndex:0];
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if (isSocial) {
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cacheDirectory = [cacheDirectory stringByAppendingPathComponent:@"avatars"];
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} else {
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cacheDirectory = [cacheDirectory stringByAppendingPathComponent:@"favicons"];
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}
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NSString *path = [cacheDirectory stringByAppendingPathComponent:filename];
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image = [UIImage imageWithContentsOfFile:path];
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}
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if (image) {
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return image;
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} else {
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if (isSocial) {
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// return [UIImage imageNamed:@"user_light.png"];
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return nil;
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} else {
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return [UIImage imageNamed:@"world.png"];
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}
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}
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}
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+ (void)drawLinearGradientWithRect:(CGRect)rect startColor:(CGColorRef)startColor endColor:(CGColorRef)endColor {
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CGContextRef context = UIGraphicsGetCurrentContext();
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CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
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CGFloat locations[] = { 0.0, 1.0 };
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NSArray *colors = [NSArray arrayWithObjects:(__bridge id)startColor, (__bridge id)endColor, nil];
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CGGradientRef gradient = CGGradientCreateWithColors(colorSpace,
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(__bridge CFArrayRef) colors, locations);
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CGPoint startPoint = CGPointMake(CGRectGetMidX(rect), CGRectGetMinY(rect));
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CGPoint endPoint = CGPointMake(CGRectGetMidX(rect), CGRectGetMaxY(rect));
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CGContextSaveGState(context);
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CGContextAddRect(context, rect);
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CGContextClip(context);
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CGContextDrawLinearGradient(context, gradient, startPoint, endPoint, 0);
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CGContextRestoreGState(context);
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CGGradientRelease(gradient);
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CGColorSpaceRelease(colorSpace);
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}
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+ (void)saveimagesToDisk {
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dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0);
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dispatch_async(queue, [^{
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for (NSString *filename in [imageCache allKeys]) {
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NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
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NSString *cacheDirectory = [paths objectAtIndex:0];
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if ([filename hasPrefix:@"social"]) {
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cacheDirectory = [cacheDirectory stringByAppendingPathComponent:@"avatars"];
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} else {
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cacheDirectory = [cacheDirectory stringByAppendingPathComponent:@"favicons"];
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}
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NSString *path = [cacheDirectory stringByAppendingPathComponent:filename];
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// Save image to disk
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UIImage *image = [imageCache objectForKey:filename];
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[UIImagePNGRepresentation(image) writeToFile:path atomically:YES];
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}
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} copy]);
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}
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+ (UIImage *)roundCorneredImage: (UIImage*) orig radius:(CGFloat) r {
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UIGraphicsBeginImageContextWithOptions(orig.size, NO, 0);
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[[UIBezierPath bezierPathWithRoundedRect:(CGRect){CGPointZero, orig.size}
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cornerRadius:r] addClip];
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[orig drawInRect:(CGRect){CGPointZero, orig.size}];
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UIImage* result = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return result;
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}
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+ (NSString *)md5:(NSString *)string {
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const char *cStr = [string UTF8String];
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unsigned char result[16];
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CC_MD5( cStr, (CC_LONG)strlen(cStr), result ); // This is the md5 call
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return [NSString stringWithFormat:
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@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
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result[0], result[1], result[2], result[3],
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result[4], result[5], result[6], result[7],
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result[8], result[9], result[10], result[11],
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result[12], result[13], result[14], result[15]
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];
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}
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+ (NSString *)formatLongDateFromTimestamp:(NSInteger)timestamp {
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if (!timestamp) timestamp = [[NSDate date] timeIntervalSince1970];
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NSDate *date = [NSDate dateWithTimeIntervalSince1970:(double)timestamp];
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static NSDateFormatter *dateFormatter = nil;
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static NSDateFormatter *todayFormatter = nil;
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static NSDateFormatter *yesterdayFormatter = nil;
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static NSDateFormatter *formatterPeriod = nil;
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NSDate *today = [NSDate date];
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NSDateComponents *components = [[NSCalendar currentCalendar]
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components:NSIntegerMax
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fromDate:today];
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[components setHour:0];
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[components setMinute:0];
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[components setSecond:0];
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NSDate *midnight = [[NSCalendar currentCalendar] dateFromComponents:components];
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NSDate *yesterday = [NSDate dateWithTimeInterval:-60*60*24 sinceDate:midnight];
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if (!dateFormatter || !todayFormatter || !yesterdayFormatter || !formatterPeriod) {
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dateFormatter = [[NSDateFormatter alloc] init];
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[dateFormatter setDateFormat:@"EEEE, MMMM d'Sth', y h:mm"];
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todayFormatter = [[NSDateFormatter alloc] init];
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[todayFormatter setDateFormat:@"'Today', MMMM d'Sth' h:mm"];
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yesterdayFormatter = [[NSDateFormatter alloc] init];
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[yesterdayFormatter setDateFormat:@"'Yesterday', MMMM d'Sth' h:mm"];
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formatterPeriod = [[NSDateFormatter alloc] init];
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[formatterPeriod setDateFormat:@"a"];
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}
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NSString *dateString;
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if ([date compare:midnight] == NSOrderedDescending) {
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dateString = [NSString stringWithFormat:@"%@%@",
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[todayFormatter stringFromDate:date],
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[[formatterPeriod stringFromDate:date] lowercaseString]];
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} else if ([date compare:yesterday] == NSOrderedDescending) {
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dateString = [NSString stringWithFormat:@"%@%@",
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[yesterdayFormatter stringFromDate:date],
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[[formatterPeriod stringFromDate:date] lowercaseString]];
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} else {
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dateString = [NSString stringWithFormat:@"%@%@",
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[dateFormatter stringFromDate:date],
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[[formatterPeriod stringFromDate:date] lowercaseString]];
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}
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dateString = [dateString stringByReplacingOccurrencesOfString:@"Sth"
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withString:[Utilities suffixForDayInDate:date]];
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return dateString;
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}
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+ (NSString *)formatShortDateFromTimestamp:(NSInteger)timestamp {
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if (!timestamp) timestamp = [[NSDate date] timeIntervalSince1970];
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NSDate *date = [NSDate dateWithTimeIntervalSince1970:(double)timestamp];
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static NSDateFormatter *dateFormatter = nil;
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static NSDateFormatter *todayFormatter = nil;
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static NSDateFormatter *yesterdayFormatter = nil;
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static NSDateFormatter *formatterPeriod = nil;
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NSDate *today = [NSDate date];
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NSDateComponents *components = [[NSCalendar currentCalendar]
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components:NSIntegerMax
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fromDate:today];
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[components setHour:0];
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[components setMinute:0];
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[components setSecond:0];
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NSDate *midnight = [[NSCalendar currentCalendar] dateFromComponents:components];
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NSDate *yesterday = [NSDate dateWithTimeInterval:-60*60*24 sinceDate:midnight];
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if (!dateFormatter || !todayFormatter || !yesterdayFormatter || !formatterPeriod) {
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dateFormatter = [[NSDateFormatter alloc] init];
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[dateFormatter setDateFormat:@"dd LLL y, h:mm"];
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todayFormatter = [[NSDateFormatter alloc] init];
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[todayFormatter setDateFormat:@"h:mm"];
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yesterdayFormatter = [[NSDateFormatter alloc] init];
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[yesterdayFormatter setDateFormat:@"'Yesterday', h:mm"];
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formatterPeriod = [[NSDateFormatter alloc] init];
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[formatterPeriod setDateFormat:@"a"];
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}
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NSString *dateString;
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if ([date compare:midnight] == NSOrderedDescending) {
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dateString = [NSString stringWithFormat:@"%@%@",
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[todayFormatter stringFromDate:date],
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[[formatterPeriod stringFromDate:date] lowercaseString]];
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} else if ([date compare:yesterday] == NSOrderedDescending) {
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dateString = [NSString stringWithFormat:@"%@%@",
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[yesterdayFormatter stringFromDate:date],
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[[formatterPeriod stringFromDate:date] lowercaseString]];
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} else {
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dateString = [NSString stringWithFormat:@"%@%@",
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[dateFormatter stringFromDate:date],
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[[formatterPeriod stringFromDate:date] lowercaseString]];
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}
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return dateString;
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}
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+ (NSString *)suffixForDayInDate:(NSDate *)date {
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NSInteger day = [[[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] components:NSDayCalendarUnit fromDate:date] day];
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if (day == 11) {
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return @"th";
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} else if (day % 10 == 1) {
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return @"st";
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} else if (day % 10 == 2) {
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return @"nd";
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} else if (day % 10 == 3) {
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return @"rd";
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} else {
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return @"th";
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}
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}
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@end |