redstrate/silica-viewer
Archived
1
Fork 0
Code Activity

Fix thumbnail provider

Browse source
This commit is contained in:
Joshua Goins 2021-05-09 22:06:58 -04:00 • committed by redstrate
parent 7f95910528
commit 1c52fc0e8e
2 changed files with 52 additions and 60 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
Thumbnail/Thumbnail.entitlements
View file

@ -2,9 +2,9 @@
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0"> <plist version="1.0">
<dict> <dict>
<key>com.apple.security.app-sandbox</key> <key>com.apple.security.app-sandbox</key>
<true/> <true/>
<key>com.apple.security.files.user-selected.read-only</key> <key>com.apple.security.files.user-selected.read-only</key>
<true/> <true/>
</dict> </dict>
</plist> </plist>

104
Thumbnail/ThumbnailProvider.swift
View file

@ -4,63 +4,55 @@ import Cocoa
class ThumbnailProvider: QLThumbnailProvider { class ThumbnailProvider: QLThumbnailProvider {
override func provideThumbnail(for request: QLFileThumbnailRequest, _ handler: @escaping (QLThumbnailReply?, Error?) -> Void) { override func provideThumbnail(for request: QLFileThumbnailRequest, _ handler: @escaping (QLThumbnailReply?, Error?) -> Void) {
let fc: NSFileCoordinator = NSFileCoordinator() do {
let intent: NSFileAccessIntent = NSFileAccessIntent.readingIntent(with: request.fileURL) guard let archive = Archive(data: try Data(contentsOf: request.fileURL), accessMode: Archive.AccessMode.read) else {
fc.coordinate(with: [intent], queue: .main) { (err) in return
if err == nil {
do {
guard let archive = Archive(data: try Data(contentsOf: intent.url), accessMode: Archive.AccessMode.read) else {
return
}
guard let entry = archive[ThumbnailPath] else {
return
}
guard let thumbnailData = readData(archive: archive, entry: entry) else {
return
}
let image = NSImage(data: thumbnailData)
let maximumSize = request.maximumSize
let imageSize = image?.size
var newImageSize = maximumSize
var contextSize = maximumSize
let aspectRatio = imageSize!.height / imageSize!.width
let proposedHeight = aspectRatio * maximumSize.width
if proposedHeight <= maximumSize.height {
newImageSize.height = proposedHeight
contextSize.height = max(proposedHeight.rounded(.down), request.minimumSize.height)
} else {
newImageSize.width = maximumSize.height / aspectRatio
contextSize.width = max(newImageSize.width.rounded(.down), request.minimumSize.width)
}
let reply: QLThumbnailReply = QLThumbnailReply.init(contextSize: contextSize) { () -> Bool in
if image != nil {
image!.draw(in: CGRect(x: contextSize.width/2 - newImageSize.width/2,
y: contextSize.height/2 - newImageSize.height/2,
width: newImageSize.width,
height: newImageSize.height));
return true
} else {
return false
}
}
handler(reply, nil)
} catch {
NSLog("Could not load file \(intent.url.lastPathComponent) to preview it")
handler(nil, nil)
}
} else {
NSLog("Could not find file \(intent.url.lastPathComponent) to preview it")
handler(nil, nil)
} }
guard let entry = archive[ThumbnailPath] else {
return
}
guard let thumbnailData = readData(archive: archive, entry: entry) else {
return
}
let image = NSImage(data: thumbnailData)
let maximumSize = request.maximumSize
let imageSize = image?.size
var newImageSize = maximumSize
var contextSize = maximumSize
let aspectRatio = imageSize!.height / imageSize!.width
let proposedHeight = aspectRatio * maximumSize.width
if proposedHeight <= maximumSize.height {
newImageSize.height = proposedHeight
contextSize.height = max(proposedHeight.rounded(.down), request.minimumSize.height)
} else {
newImageSize.width = maximumSize.height / aspectRatio
contextSize.width = max(newImageSize.width.rounded(.down), request.minimumSize.width)
}
let reply: QLThumbnailReply = QLThumbnailReply.init(contextSize: contextSize) { () -> Bool in
if image != nil {
image!.draw(in: CGRect(x: contextSize.width/2 - newImageSize.width/2,
y: contextSize.height/2 - newImageSize.height/2,
width: newImageSize.width,
height: newImageSize.height));
return true
} else {
return false
}
}
handler(reply, nil)
} catch {
NSLog("Could not access file \(request.fileURL.lastPathComponent) to preview it")
handler(nil, nil)
} }
} }
} }