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AFQuickLookView.m
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AFQuickLookView.m
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// AFQuickLookView.m
// Copyright (c) 2013 XING AG (http://www.xing.com/)
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#import "AFQuickLookViewHTTPClient.h"
#import "AFQuickLookView.h"
#import <AFNetworking/AFNetworking.h>
// Control the positioning of attachmentDetailView subviews here
static CGFloat kPaddingTopBetweenFileImageViewAndSuperview = 10.0f;
static CGFloat kPaddingTopBetweenFilenameLabelAndImageView = 10.0f;
static CGFloat kPaddingTopBetweenProgressViewAndFilenameLabel = 10.0f;
static CGFloat kPaddingLeftAndRightFilenameLabel = 60.0f;
static CGFloat kPaddingLeftAndRightProgressView = 80.0f;
static CGSize kPreDownloadFileImageViewSize = {100.0f, 120.0f};
static CGFloat kPreDownloadFilenameLabelHeight = 30.0f;
static CGFloat kPreDownloadProgressViewHeight = 11.0f;
static NSMutableDictionary* _mimeTypesToExtensionsDictionary = nil;
typedef void (^AFQuickLookPreviewSuccessBlock)(void);
typedef void (^AFQuickLookPreviewFailureBlock)(NSError* error);
typedef void (^AFQuickLookPreviewProgressBlock)(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead);
@interface AFQuickLookView () <QLPreviewControllerDelegate, QLPreviewControllerDataSource>
@property(nonatomic, strong, readwrite) QLPreviewController *previewController;
@property(nonatomic, strong, readwrite) NSURL* fileURL;
@property(nonatomic, strong, readwrite) AFQuickLookPreviewSuccessBlock successBlock;
@property(nonatomic, strong, readwrite) AFQuickLookPreviewFailureBlock failureBlock;
@property(nonatomic, strong, readwrite) AFQuickLookPreviewProgressBlock progressBlock;
@property(nonatomic, strong, readwrite) UIView* preDownloadDetailView;
@property(nonatomic, strong, readwrite) UIProgressView* preDownloadProgressView;
@property(nonatomic, strong, readwrite) UILabel* preDownloadFilenameLabel;
@property(nonatomic, strong, readwrite) UIImageView* preDownloadFileImageView;
@end
@implementation AFQuickLookView
- (id)initWithFrame:(CGRect)frame preDownloadDetailViewVisible:(BOOL)preDownloadDetailViewVisible preDownloadPlaceholderImage:(UIImage*)image filename:(NSString*)filename {
self = [super initWithFrame:frame];
if (self) {
_preDownloadDetailViewVisible = preDownloadDetailViewVisible;
[self setupWithPreDownloadDetailViewVisible:preDownloadDetailViewVisible preDownloadPlaceholderImage:image filename:filename];
}
return self;
}
- (id)initWithFrame:(CGRect)frame preDownloadDetailViewVisible:(BOOL)preDownloadDetailViewVisible {
self = [self initWithFrame:frame preDownloadDetailViewVisible:preDownloadDetailViewVisible preDownloadPlaceholderImage:nil filename:nil];
return self;
}
- (id)initWithFrame:(CGRect)frame {
self = [self initWithFrame:frame preDownloadDetailViewVisible:YES preDownloadPlaceholderImage:nil filename:nil];
return self;
}
#pragma mark - general view setup
- (void)setupWithPreDownloadDetailViewVisible:(BOOL)preDownloadDetailViewVisible preDownloadPlaceholderImage:(UIImage*)image filename:(NSString*)filename {
if (preDownloadDetailViewVisible) {
self.previewController = [[QLPreviewController alloc] init];
[self setupPreviewController:self.previewController];
self.preDownloadDetailView = [[UIView alloc] initWithFrame:self.bounds];
[self addSubview:self.preDownloadDetailView];
[self setupPreDownloadDetailView:self.preDownloadDetailView];
[self setupPreDownloadPlaceholderImage:image filename:filename];
}
}
- (void)setupPreDownloadPlaceholderImage:(UIImage*)image
filename:(NSString*)filename {
self.preDownloadFilenameLabel.text = filename;
self.preDownloadFileImageView.image = image;
}
- (void)setupPreviewController:(QLPreviewController*)controller {
controller.dataSource = self;
controller.view.frame = self.bounds;
}
#pragma mark - attachment detail view setup
- (void)initializePreDownloadDetailViewSubviews {
self.preDownloadProgressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleBar];
self.preDownloadFileImageView = [[UIImageView alloc] initWithFrame:CGRectZero];
self.preDownloadFilenameLabel = [[UILabel alloc] initWithFrame:CGRectZero];
}
- (void)addSubviewsToPreDownloadDetailView:(UIView*)attachmentDetailView {
[attachmentDetailView addSubview:self.preDownloadFileImageView];
[attachmentDetailView addSubview:self.preDownloadFilenameLabel];
[attachmentDetailView addSubview:self.preDownloadProgressView];
}
- (void)setupPreDownloadDetailView:(UIView*)preDownloadDetailView {
if (NO == self.preDownloadDetailViewVisible) {
return;
}
[self initializePreDownloadDetailViewSubviews];
[self setupSubviewsForPreDownloadDetailView:self.preDownloadDetailView];
[self addSubviewsToPreDownloadDetailView:self.preDownloadDetailView];
}
- (void)layoutSubviews {
[self layoutSubviewsForPreDownloadDetailView:self.preDownloadDetailView];
}
- (void)layoutSubviewsForPreDownloadDetailView:(UIView*)preDownloadDetailView {
[self verticalAlignFileImageView:self.preDownloadFileImageView withProgressView:self.preDownloadProgressView detailView:preDownloadDetailView];
[self verticalAlignFilenameLabel:self.preDownloadFilenameLabel withFileImageView:self.preDownloadFileImageView detailView:preDownloadDetailView];
[self verticalAlignProgressView:self.preDownloadProgressView withFilenameLabel:self.preDownloadFilenameLabel detailView:preDownloadDetailView];
}
- (void)setupSubviewsForPreDownloadDetailView:(UIView*)preDownloadDetailView {
[self setupFileImageView:self.preDownloadFileImageView withProgressView:self.preDownloadProgressView detailView:preDownloadDetailView];
[self setupFilenameLabel:self.preDownloadFilenameLabel withFileImageView:self.preDownloadFileImageView detailView:preDownloadDetailView];
[self setupProgressView:self.preDownloadProgressView withFilenameLabel:self.preDownloadFilenameLabel detailView:preDownloadDetailView];
}
#pragma mark - progress detail view setup method
- (void)setupFileImageView:(UIImageView*)fileImageView withProgressView:(UIProgressView*)progressView detailView:(UIView*)detailView {
fileImageView.frame = CGRectMake(0.0f, 0.0f, kPreDownloadFileImageViewSize.width, kPreDownloadFileImageViewSize.height);
fileImageView.center = detailView.center;
[self verticalAlignFileImageView:fileImageView withProgressView:progressView detailView:detailView];
}
- (void)setupFilenameLabel:(UILabel*)filenameLabel withFileImageView:(UIImageView*)fileImageView detailView:(UIView*)detailView {
filenameLabel.textAlignment = UITextAlignmentCenter;
filenameLabel.frame = CGRectMake(0.0f, 0.0f, CGRectGetWidth(detailView.frame) - 2*kPaddingLeftAndRightFilenameLabel, kPreDownloadFilenameLabelHeight);
filenameLabel.center = detailView.center;
[self verticalAlignFilenameLabel:filenameLabel withFileImageView:fileImageView detailView:detailView];
}
- (void)setupProgressView:(UIProgressView*)progressView withFilenameLabel:(UILabel*)filenameLabel detailView:(UIView*)detailView {
progressView.frame = CGRectMake(0.0f, 0.0f, CGRectGetWidth(detailView.frame) - 2*kPaddingLeftAndRightProgressView, kPreDownloadProgressViewHeight);
progressView.center = detailView.center;
[self verticalAlignProgressView:progressView withFilenameLabel:filenameLabel detailView:detailView];
}
#pragma mark - progress detail view align method
- (void)verticalAlignFileImageView:(UIImageView*)fileImageView withProgressView:(UIProgressView*)progressView detailView:(UIView*)detailView {
CGFloat heightOfAllSubviews = CGRectGetHeight(fileImageView.frame) + CGRectGetHeight(progressView.frame) + CGRectGetHeight(self.preDownloadFilenameLabel.frame) + kPaddingTopBetweenFilenameLabelAndImageView + kPaddingTopBetweenProgressViewAndFilenameLabel;
fileImageView.frame = CGRectMake(CGRectGetMinX(fileImageView.frame), (CGRectGetHeight(detailView.bounds) - heightOfAllSubviews) / 2,CGRectGetWidth(fileImageView.frame), CGRectGetHeight(fileImageView.frame));
}
- (void)verticalAlignFilenameLabel:(UILabel*)filenameLabel withFileImageView:(UIView*)fileImageView detailView:(UIView*)detailView {
filenameLabel.frame = CGRectMake(CGRectGetMinX(filenameLabel.frame), CGRectGetMinY(fileImageView.frame) + CGRectGetHeight(fileImageView.frame) + kPaddingTopBetweenProgressViewAndFilenameLabel, CGRectGetWidth(filenameLabel.frame), CGRectGetHeight(filenameLabel.frame));
}
- (void)verticalAlignProgressView:(UIProgressView*)progressView withFilenameLabel:(UILabel*)filenameLabel detailView:(UIView*)detailView {
progressView.frame = CGRectMake(CGRectGetMinX(progressView.frame), CGRectGetMinY(filenameLabel.frame) + CGRectGetHeight(filenameLabel.frame) + kPaddingTopBetweenProgressViewAndFilenameLabel, CGRectGetWidth(progressView.frame), CGRectGetHeight(progressView.frame));
}
#pragma mark - actions
- (void)refreshProgressViewWithTotalBytesRead:(long long)totalBytesRead
totalBytesExpectedToRead:(long long)totalBytesExpectedToRead {
CGFloat progress = ((CGFloat)totalBytesRead / (CGFloat)totalBytesExpectedToRead);
self.preDownloadProgressView.progress = progress;
}
- (void)downloadDocumentAtURL:(NSURL*)url
success:(void (^)(AFHTTPRequestOperation* operation, NSURL *localFileURL))success
failure:(void (^)(AFHTTPRequestOperation* operation, NSError* error))failure {
[self downloadDocumentAtURL:url success:success failure:failure progress:NULL];
}
- (void)downloadDocumentAtURL:(NSURL*)url
success:(void (^)(AFHTTPRequestOperation* operation, NSURL *localFileURL))success
failure:(void (^)(AFHTTPRequestOperation* operation, NSError* error))failure
progress:(void (^)(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead))progress {
__weak __typeof(&*self)weakSelf = self;
[[AFQuickLookViewHTTPClient sharedClient] getPath:url.absoluteString
parameters:nil
success:
^(AFHTTPRequestOperation *operation, id responseObject) {
[weakSelf saveDataToTemporaryFileWithOperation:operation
success:success
failure:^(AFHTTPRequestOperation *operation, NSError *error) {
[weakSelf handleCouldNotSaveDataToTemporaryFileWithOperation:operation error:error];
}];
} failure:failure progress:progress];
}
- (void)saveDataToTemporaryFileWithOperation:(AFHTTPRequestOperation*)operation
success:(void (^)(AFHTTPRequestOperation* operation, NSURL *localFileURL))success
failure:(void (^)(AFHTTPRequestOperation* operation, NSError* error))failure {
NSData* data = operation.responseData;
BOOL isResponseDataValid = (data && data.length > 0);
if (NO == isResponseDataValid) {
failure(operation, nil);
}
NSError* error = nil;
NSURL* url = [self temporaryFileURLWithResponse:operation.response];
BOOL didWriteToFile = [data writeToURL:url options:NSDataWritingAtomic error:&error];
if (didWriteToFile) {
success(operation, url);
} else {
failure(operation, error);
}
}
#pragma mark - handle errors
- (void)handleCouldNotSaveDataToTemporaryFileWithOperation:(AFHTTPRequestOperation*)operation
error:(NSError*)error {
[self handleFailureBlockWithError:error];
}
- (void)handleCouldNotDownloadDataForGivenURL:(NSURL*)url
operation:(AFHTTPRequestOperation*)operation
error:(NSError*)error {
[self handleFailureBlockWithError:error];
}
- (void)handleFailureBlockWithError:(NSError*)error {
if (self.failureBlock) {
self.failureBlock(error);
}
}
#pragma mark - preview methods
- (void)previewDocumentAtURL:(NSURL*)url {
__weak __typeof(&*self)weakSelf = self;
[self previewDocumentAtURL:url inPreviewController:self.previewController success:NULL failure:NULL progress:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
[weakSelf refreshProgressViewWithTotalBytesRead:totalBytesRead totalBytesExpectedToRead:totalBytesExpectedToRead];
}];
}
- (void)previewDocumentAtURL:(NSURL*)url
success:(void (^)(void))success
failure:(void (^)(NSError* error))failure {
__weak __typeof(&*self)weakSelf = self;
[self previewDocumentAtURL:url inPreviewController:self.previewController success:success failure:failure progress:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {
[weakSelf refreshProgressViewWithTotalBytesRead:totalBytesRead totalBytesExpectedToRead:totalBytesExpectedToRead];
}];
}
- (void)previewDocumentAtURL:(NSURL*)url
success:(void (^)(void))success
failure:(void (^)(NSError* error))failure
progress:(void (^)(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead))progress {
[self previewDocumentAtURL:url inPreviewController:self.previewController success:success failure:failure progress:progress];
}
- (void)previewDocumentAtURL:(NSURL*)url
inPreviewController:(QLPreviewController*)previewController
success:(void (^)(void))success
failure:(void (^)(NSError* error))failure
progress:(void (^)(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead))progress {
self.successBlock = success;
self.failureBlock = failure;
__weak __typeof(&*self)weakSelf = self;
if(url.isFileURL) {
[self openDocumentPreviewAtLocalURL:url inPreviewController:previewController];
} else {
[self downloadDocumentAtURL:url
success:
^(AFHTTPRequestOperation *operation, NSURL *localFileURL) {
[weakSelf openDocumentPreviewAtLocalURL:localFileURL inPreviewController:previewController];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
[weakSelf handleCouldNotDownloadDataForGivenURL:url operation:operation error:error];
} progress:progress];
}
}
- (void)openDocumentPreviewAtLocalURL:(NSURL*)url
inPreviewController:(QLPreviewController *)previewController {
[_preDownloadDetailView removeFromSuperview];
self.fileURL = url;
[self addSubview:_previewController.view];
[previewController reloadData];
if (self.successBlock) {
self.successBlock();
}
}
#pragma mark - cancel request
- (void)cancelDownloadOperation {
[[AFQuickLookViewHTTPClient sharedClient] cancelAllDownloadOperations];
}
#pragma mark - QLPreviewControllerDataSource delegate
- (NSInteger)numberOfPreviewItemsInPreviewController:(QLPreviewController *)previewController {
NSInteger numToPreview = 0;
return numToPreview;
}
- (id)previewController:(QLPreviewController *)previewController previewItemAtIndex:(NSInteger)idx {
NSURL* fileURL = self.fileURL;
return fileURL;
}
#pragma mark - build temporary file path
- (NSURL*)temporaryFileURLWithResponse:(NSHTTPURLResponse*)response {
NSString* path = [self temporaryFilePathForResponse:response];
return [NSURL fileURLWithPath:path isDirectory:NO];
}
- (NSString*)temporaryFilePathForResponse:(NSHTTPURLResponse*)response {
NSString* filename = [self filenameFromResponse:response];
NSString* directory = [self directoryForTemporaryFiles];
NSString* filePath = [directory stringByAppendingPathComponent:filename];
return filePath;
}
- (NSString*)filenameFromResponse:(NSHTTPURLResponse*)response {
NSString* filename = nil;
NSString* filenameFromContentType = [self filenameFromContentTypeHeaderInResponse:response];
NSString* filenameFromContentDisposition = [self filenameFromContentDispositionHeaderInResponse:response];
if (filenameFromContentType) {
filename = filenameFromContentType;
} else if(filenameFromContentDisposition) {
filename = filenameFromContentDisposition;
} else {
filename = [self genericTemporaryFileName];
}
return filename;
}
- (NSString*)filenameFromContentDispositionHeaderInResponse:(NSHTTPURLResponse*)response {
NSString *filename = nil;
NSString* contentDisposition = response.allHeaderFields[@"Content-Disposition"];
if (contentDisposition) {
filename = [[self getFilenameFrom:contentDisposition] stringByTrimmingCharactersInSet:self.characterSetToTrimFromFilename];
}
return filename;
}
- (NSString*)filenameFromContentTypeHeaderInResponse:(NSHTTPURLResponse*)response {
NSString* filename = nil;
if (response.MIMEType) {
NSString* extension = [self fileExtensionForMIMEType:response.MIMEType];
filename = self.genericTemporaryFileName;
filename = [filename stringByAppendingFormat:@".%@", extension];
}
return filename;
}
- (NSString*)directoryForTemporaryFiles {
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
return documentsDirectory;
}
- (NSString*)genericTemporaryFileName {
return @"com.afquicklook.temp";
}
- (NSCharacterSet*)characterSetToTrimFromFilename {
return [NSCharacterSet characterSetWithCharactersInString:@"\""];
}
/*
- this method has been taken from:
- http://stackoverflow.com/questions/10278791/get-filename-from-content-disposition-header
*/
- (NSString *)getFilenameFrom:(NSString *)string {
NSRange startRange = [string rangeOfString:@"filename="];
if (startRange.location != NSNotFound && startRange.length != NSNotFound) {
int filenameStart = startRange.location + startRange.length;
NSRange endRange = [string rangeOfString:@" " options:NSLiteralSearch range:NSMakeRange(filenameStart, [string length] - filenameStart)];
int filenameLength = 0;
if (endRange.location != NSNotFound && endRange.length != NSNotFound) {
filenameLength = endRange.location - filenameStart;
} else {
filenameLength = [string length] - filenameStart;
}
return [string substringWithRange:NSMakeRange(filenameStart, filenameLength)];
}
return nil;
}
#pragma mark - handle file extensions for MIME types
- (NSString*)fileExtensionForMIMEType:(NSString*)mimeType {
if (NO == [mimeType isKindOfClass:[NSString class]]) {
return nil;
}
NSMutableDictionary* extensions = [AFQuickLookView mimeTypesToExtensionsDictionary];
NSString* extension = extensions[mimeType];
return extension;
}
+ (NSMutableDictionary*) mimeTypesToExtensionsDictionary {
if (nil == _mimeTypesToExtensionsDictionary) {
_mimeTypesToExtensionsDictionary = [NSMutableDictionary dictionary];
_mimeTypesToExtensionsDictionary[@"application/pdf"] = @"pdf";
_mimeTypesToExtensionsDictionary[@"application/msword"] = @"doc";
_mimeTypesToExtensionsDictionary[@"application/vnd.openxmlformats-officedocument.presentationml.presentation"] = @"pptx";
_mimeTypesToExtensionsDictionary[@"application/vnd.openxmlformats-officedocument.wordprocessingml.document"] = @"docx";
_mimeTypesToExtensionsDictionary[@"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"] = @"xlsx";
_mimeTypesToExtensionsDictionary[@"image/jpeg"] = @"jpeg";
_mimeTypesToExtensionsDictionary[@"application/pdf"] = @"pdf";
_mimeTypesToExtensionsDictionary[@"application/vnd.ms-powerpoint"] = @"ppt";
_mimeTypesToExtensionsDictionary[@"application/rtf"] = @"rtf";
_mimeTypesToExtensionsDictionary[@"image/tiff"] = @"tiff";
_mimeTypesToExtensionsDictionary[@"text/plain"] = @"txt";
_mimeTypesToExtensionsDictionary[@"application/vnd.ms-excel"] = @"xls";
}
return _mimeTypesToExtensionsDictionary;
}
@end