transmission/macosx/QuickLookPlugin/GeneratePreviewForURL.mm

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@import AppKit;
@import CoreFoundation;
@import QuickLook;
#include <string>
#include <libtransmission/torrent-metainfo.h>
#import "NSStringAdditions.h"
QL_EXTERN_C_BEGIN
OSStatus GeneratePreviewForURL(void* thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options);
void CancelPreviewGeneration(void* thisInterface, QLPreviewRequestRef preview);
QL_EXTERN_C_END
NSString* generateIconData(NSString* fileExtension, NSUInteger width, NSMutableDictionary* allImgProps)
{
NSString* rawFilename = ![fileExtension isEqualToString:@""] ? fileExtension : @"blank_file_name_transmission";
// we need to do this once per file extension, per size
NSString* iconFileName = [NSString stringWithFormat:@"%ldx%@.tiff", width, rawFilename];
if (!allImgProps[iconFileName])
{
NSImage* icon = [[NSWorkspace sharedWorkspace] iconForFileType:fileExtension];
NSRect const iconFrame = NSMakeRect(0.0, 0.0, width, width);
NSImage* renderedIcon = [[NSImage alloc] initWithSize:iconFrame.size];
[renderedIcon lockFocus];
[icon drawInRect:iconFrame fromRect:NSZeroRect operation:NSCompositingOperationCopy fraction:1.0];
[renderedIcon unlockFocus];
NSData* iconData = renderedIcon.TIFFRepresentation;
NSDictionary* imgProps = @{
(NSString*)kQLPreviewPropertyMIMETypeKey : @"image/png",
(NSString*)kQLPreviewPropertyAttachmentDataKey : iconData
};
allImgProps[iconFileName] = imgProps;
}
return [@"cid:" stringByAppendingString:iconFileName];
}
OSStatus GeneratePreviewForURL(void* thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options)
{
// Before proceeding make sure the user didn't cancel the request
if (QLPreviewRequestIsCancelled(preview))
{
return noErr;
}
//we need this call to ensure NSApp is initialized (not done automatically for plugins)
[NSApplication sharedApplication];
//try to parse the torrent file
auto metainfo = tr_torrent_metainfo{};
if (!metainfo.parseTorrentFile(((__bridge NSURL*)url).path.UTF8String))
{
return noErr;
}
NSBundle* bundle = [NSBundle bundleWithIdentifier:@"org.m0k.transmission.QuickLookPlugin"];
NSURL* styleURL = [bundle URLForResource:@"style" withExtension:@"css"];
NSString* styleContents = [NSString stringWithContentsOfURL:styleURL encoding:NSUTF8StringEncoding error:NULL];
NSMutableString* htmlString = [NSMutableString string];
[htmlString appendFormat:@"<html><style type=\"text/css\">%@</style><body>", styleContents];
NSMutableDictionary* allImgProps = [NSMutableDictionary dictionary];
NSString* name = @(metainfo.name().c_str());
auto const n_files = metainfo.fileCount();
auto const is_multifile = n_files > 1;
NSString* fileTypeString = is_multifile ? NSFileTypeForHFSTypeCode(kGenericFolderIcon) : name.pathExtension;
NSUInteger const width = 32;
[htmlString appendFormat:@"<h2><img class=\"icon\" src=\"%@\" width=\"%ld\" height=\"%ld\" />%@</h2>",
generateIconData(fileTypeString, width, allImgProps),
width,
width,
name];
NSString* fileSizeString = [NSString stringForFileSize:metainfo.totalSize()];
if (is_multifile)
{
NSString* fileCountString = [NSString
stringWithFormat:NSLocalizedStringFromTableInBundle(@"%lu files", nil, bundle, "quicklook file count"), n_files];
fileSizeString = [NSString stringWithFormat:@"%@, %@", fileCountString, fileSizeString];
}
[htmlString appendFormat:@"<p>%@</p>", fileSizeString];
auto const date_created = metainfo.dateCreated();
NSString* dateCreatedString = date_created > 0 ?
[NSDateFormatter localizedStringFromDate:[NSDate dateWithTimeIntervalSince1970:date_created] dateStyle:NSDateFormatterLongStyle
timeStyle:NSDateFormatterShortStyle] :
nil;
auto const& creator = metainfo.creator();
NSString* creatorString = !std::empty(creator) ? @(creator.c_str()) : nil;
if ([creatorString isEqualToString:@""])
{
creatorString = nil;
}
NSString* creationString = nil;
if (dateCreatedString && creatorString)
{
creationString = [NSString
stringWithFormat:NSLocalizedStringFromTableInBundle(@"Created on %@ with %@", nil, bundle, "quicklook creation info"),
dateCreatedString,
creatorString];
}
else if (dateCreatedString)
{
creationString = [NSString
stringWithFormat:NSLocalizedStringFromTableInBundle(@"Created on %@", nil, bundle, "quicklook creation info"), dateCreatedString];
}
else if (creatorString)
{
creationString = [NSString
stringWithFormat:NSLocalizedStringFromTableInBundle(@"Created with %@", nil, bundle, "quicklook creation info"), creatorString];
}
if (creationString)
{
[htmlString appendFormat:@"<p>%@</p>", creationString];
}
auto const& commentStr = metainfo.comment();
if (!std::empty(commentStr))
{
NSString* comment = @(commentStr.c_str());
if (![comment isEqualToString:@""])
[htmlString appendFormat:@"<p>%@</p>", comment];
}
NSMutableArray* lists = [NSMutableArray array];
auto const n_webseeds = metainfo.webseedCount();
if (n_webseeds > 0)
{
NSMutableString* listSection = [NSMutableString string];
[listSection appendString:@"<table>"];
NSString* headerTitleString = n_webseeds == 1 ?
NSLocalizedStringFromTableInBundle(@"1 Web Seed", nil, bundle, "quicklook web seed header") :
[NSString stringWithFormat:NSLocalizedStringFromTableInBundle(@"%lu Web Seeds", nil, bundle, "quicklook web seed header"), n_webseeds];
[listSection appendFormat:@"<tr><th>%@</th></tr>", headerTitleString];
for (size_t i = 0; i < n_webseeds; ++i)
{
[listSection appendFormat:@"<tr><td>%s<td></tr>", metainfo.webseed(i).c_str()];
}
[listSection appendString:@"</table>"];
[lists addObject:listSection];
}
auto const& announce_list = metainfo.announceList();
if (!std::empty(announce_list))
{
NSMutableString* listSection = [NSMutableString string];
[listSection appendString:@"<table>"];
auto const n = std::size(announce_list);
NSString* headerTitleString = n == 1 ?
NSLocalizedStringFromTableInBundle(@"1 Tracker", nil, bundle, "quicklook tracker header") :
[NSString stringWithFormat:NSLocalizedStringFromTableInBundle(@"%lu Trackers", nil, bundle, "quicklook tracker header"), n];
[listSection appendFormat:@"<tr><th>%@</th></tr>", headerTitleString];
#warning handle tiers?
for (auto const& tracker : announce_list)
{
[listSection appendFormat:@"<tr><td>%s<td></tr>", tracker.announce.c_str()];
}
[listSection appendString:@"</table>"];
[lists addObject:listSection];
}
if (is_multifile)
{
NSMutableString* listSection = [NSMutableString string];
[listSection appendString:@"<table>"];
NSString* fileTitleString = [NSString
stringWithFormat:NSLocalizedStringFromTableInBundle(@"%lu Files", nil, bundle, "quicklook file header"), n_files];
[listSection appendFormat:@"<tr><th>%@</th></tr>", fileTitleString];
#warning display folders?
for (auto const& [path, size] : metainfo.files().sortedByPath())
{
NSString* fullFilePath = @(path.c_str());
NSCAssert([fullFilePath hasPrefix:[name stringByAppendingString:@"/"]], @"Expected file path %@ to begin with %@/", fullFilePath, name);
NSString* shortenedFilePath = [fullFilePath substringFromIndex:name.length + 1];
NSString* shortenedFilePathAndSize = [NSString
stringWithFormat:@"%@ - %@", shortenedFilePath, [NSString stringForFileSize:size]];
NSUInteger const width = 16;
[listSection appendFormat:@"<tr><td><img class=\"icon\" src=\"%@\" width=\"%ld\" height=\"%ld\" />%@<td></tr>",
generateIconData(shortenedFilePath.pathExtension, width, allImgProps),
width,
width,
shortenedFilePathAndSize];
}
[listSection appendString:@"</table>"];
[lists addObject:listSection];
}
if (lists.count > 0)
{
[htmlString appendFormat:@"<hr/><br>%@", [lists componentsJoinedByString:@"<br>"]];
}
[htmlString appendString:@"</body></html>"];
NSDictionary* props = @{
(NSString*)kQLPreviewPropertyTextEncodingNameKey : @"UTF-8",
(NSString*)kQLPreviewPropertyMIMETypeKey : @"text/html",
(NSString*)kQLPreviewPropertyAttachmentsKey : allImgProps
};
QLPreviewRequestSetDataRepresentation(
preview,
(__bridge CFDataRef)[htmlString dataUsingEncoding:NSUTF8StringEncoding],
kUTTypeHTML,
(__bridge CFDictionaryRef)props);
return noErr;
}
void CancelPreviewGeneration(void* thisInterface, QLPreviewRequestRef preview)
{
// Implement only if supported
}