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Quick Look Thumbnails + Document Icon support #32

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Jan 14, 2023
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6 changes: 6 additions & 0 deletions Avenue Thumbnails/Assets.xcassets/Contents.json
Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
{
"info" : {
"author" : "xcode",
"version" : 1
}
}
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@@ -0,0 +1,22 @@
{
"images" : [
{
"filename" : "V2.png",
"idiom" : "universal",
"scale" : "1x"
},
{
"filename" : "[email protected]",
"idiom" : "universal",
"scale" : "2x"
},
{
"idiom" : "universal",
"scale" : "3x"
}
],
"info" : {
"author" : "xcode",
"version" : 1
}
}
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10 changes: 10 additions & 0 deletions Avenue Thumbnails/Avenue_Thumbnails.entitlements
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>com.apple.security.app-sandbox</key>
<true/>
<key>com.apple.security.files.user-selected.read-only</key>
<true/>
</dict>
</plist>
28 changes: 28 additions & 0 deletions Avenue Thumbnails/Info.plist
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@@ -0,0 +1,28 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>NSExtension</key>
<dict>
<key>NSExtensionAttributes</key>
<dict>
<key>QLSupportedContentTypes</key>
<array>
<string>com.topografix.gpx</string>
<string>com.apple.dt.document.gpx</string>
<string>com.glacierpeakstudios.gpx</string>
<string>com.berbie.documenttypes.gpx</string>
<string>com.topographix.gpx</string>
<string>public.gpx</string>
<string>public.xml</string>
</array>
<key>QLThumbnailMinimumDimension</key>
<integer>0</integer>
</dict>
<key>NSExtensionPointIdentifier</key>
<string>com.apple.quicklook.thumbnail</string>
<key>NSExtensionPrincipalClass</key>
<string>$(PRODUCT_MODULE_NAME).ThumbnailProvider</string>
</dict>
</dict>
</plist>
81 changes: 81 additions & 0 deletions Avenue Thumbnails/ThumbnailProvider.swift
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//
// ThumbnailProvider.swift
// Avenue Thumbnails
//
// Created by Vincent Neo on 13/1/23.
// Copyright © 2023 Vincent. All rights reserved.
//

import QuickLookThumbnailing
import MapKit
import CoreGPX

class ThumbnailProvider: QLThumbnailProvider {

func prepareExtent(from gpx: GPXRoot) -> GPXExtentCoordinates {
let extent = GPXExtentCoordinates()
for route in gpx.routes {
for point in route.points {
extent.extendAreaToIncludeLocation(point.coordinate)
}
}

for track in gpx.tracks {
for segment in track.segments {
for point in segment.points {
extent.extendAreaToIncludeLocation(point.coordinate)
}
}
}

for waypoint in gpx.waypoints {
extent.extendAreaToIncludeLocation(waypoint.coordinate)
}
return extent
}

override func provideThumbnail(for request: QLFileThumbnailRequest, _ handler: @escaping (QLThumbnailReply?, Error?) -> Void) {

// There are three ways to provide a thumbnail through a QLThumbnailReply. Only one of them should be used.

// First way: Draw the thumbnail into the current context, set up with UIKit's coordinate system.
guard let parser = GPXParser(withURL: request.fileURL), let gpx = parser.parsedData() else {
handler(nil, GPXError.parser.fileIsEmpty)
return
}

let extent = self.prepareExtent(from: gpx)

let options = MKMapSnapshotter.Options()
options.region = extent.region
options.size = request.maximumSize

let snapshotter = MKMapSnapshotter(options: options)
snapshotter.start { snapshot, error in
let drawer = MKSnapshotDrawer(snapshot!, gpx: gpx)
let newImage = drawer.processImage()

handler(QLThumbnailReply(contextSize: request.maximumSize, currentContextDrawing: { () -> Bool in
// Draw the thumbnail here.
newImage.draw(in: NSRect(origin: .zero, size: request.maximumSize))
// Return true if the thumbnail was successfully drawn inside this block.
return true
}), nil)
}

/*

// Second way: Draw the thumbnail into a context passed to your block, set up with Core Graphics's coordinate system.
handler(QLThumbnailReply(contextSize: request.maximumSize, drawing: { (context) -> Bool in
// Draw the thumbnail here.

// Return true if the thumbnail was successfully drawn inside this block.
return true
}), nil)

// Third way: Set an image file URL.
handler(QLThumbnailReply(imageFileURL: Bundle.main.url(forResource: "fileThumbnail", withExtension: "jpg")!), nil)

*/
}
}
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