382 lines
14 KiB
Swift
382 lines
14 KiB
Swift
import AppKit
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import SwiftUI
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import UniformTypeIdentifiers
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let maxImageBytes = 5 << 20
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struct PendingImage: Identifiable {
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let id = UUID()
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let data: Data
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let image: NSImage
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}
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func imageType(_ data: Data) -> String? {
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let b = [UInt8](data.prefix(12))
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if b.starts(with: [0x89, 0x50, 0x4E, 0x47]) {
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return "png"
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}
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if b.starts(with: [0xFF, 0xD8, 0xFF]) {
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return "jpeg"
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}
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if b.starts(with: Array("GIF8".utf8)) {
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return "gif"
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}
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if b.count == 12, b.starts(with: Array("RIFF".utf8)), Array(b[8..<12]) == Array("WEBP".utf8) {
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return "webp"
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}
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return nil
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}
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func pngFromTIFF(_ data: Data) -> Data? {
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NSBitmapImageRep(data: data)?.representation(using: .png, properties: [:])
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}
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@MainActor
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@Observable
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final class Attachments {
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var images: [PendingImage] = []
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let server: Server
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let name: String
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init(server: Server, name: String) {
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self.server = server
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self.name = name
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}
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func add(_ data: Data, from source: String) {
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guard let kind = imageType(data), let image = NSImage(data: data) else {
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server.log("\(name): \(source) gave \(data.count) bytes that aren't PNG, JPEG, GIF or WebP")
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return
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}
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if data.count > maxImageBytes {
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server.log("\(name): \(source) image is over \(maxImageBytes >> 20) MiB")
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return
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}
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server.log("\(name): \(source) attached a \(kind), \(data.count) bytes")
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images.append(PendingImage(data: data, image: image))
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}
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func add(pasteboard pb: NSPasteboard, from source: String) -> Bool {
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if let urls = pb.readObjects(forClasses: [NSURL.self], options: [.urlReadingFileURLsOnly: true]) as? [URL], !urls.isEmpty {
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var any = false
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for url in urls {
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if let data = try? Data(contentsOf: url), imageType(data) != nil || pngFromTIFF(data) != nil && NSImage(data: data) != nil {
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add(imageType(data) != nil ? data : pngFromTIFF(data)!, from: "\(source) file \(url.lastPathComponent)")
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any = true
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}
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}
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return any
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}
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for t in [NSPasteboard.PasteboardType.png, NSPasteboard.PasteboardType(UTType.jpeg.identifier), NSPasteboard.PasteboardType(UTType.gif.identifier), NSPasteboard.PasteboardType(UTType.webP.identifier)] {
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if let data = pb.data(forType: t) {
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add(data, from: "\(source) \(t.rawValue)")
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return true
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}
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}
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if let tiff = pb.data(forType: .tiff), let png = pngFromTIFF(tiff) {
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add(png, from: "\(source) public.tiff converted to PNG")
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return true
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}
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return false
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}
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func add(providers: [NSItemProvider], from source: String) {
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server.log("\(name): \(source) with types \(providers.map { $0.registeredTypeIdentifiers })")
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for p in providers {
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let types = [UTType.png, .jpeg, .gif, .webP, .tiff, .fileURL].filter { p.hasItemConformingToTypeIdentifier($0.identifier) }
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guard let t = types.first else {
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continue
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}
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_ = p.loadDataRepresentation(for: t) { data, error in
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Task { @MainActor in
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guard let data else {
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self.server.log("\(self.name): \(source) load failed: \(String(describing: error))")
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return
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}
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if t == .fileURL, let url = URL(dataRepresentation: data, relativeTo: nil), let file = try? Data(contentsOf: url) {
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self.add(imageType(file) != nil ? file : (pngFromTIFF(file) ?? file), from: "\(source) file \(url.lastPathComponent)")
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} else if t == .tiff, let png = pngFromTIFF(data) {
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self.add(png, from: "\(source) tiff converted to PNG")
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} else {
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self.add(data, from: "\(source) \(t.identifier)")
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}
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}
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}
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}
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}
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func send(_ text: String) {
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let images = self.images
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self.images = []
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server.log("\(name): send \(text.debugDescription) with \(images.count) images")
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Task {
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for img in images {
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do {
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server.log("\(name): uploaded blob \(try await server.upload(img.data))")
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} catch {
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server.log("\(name): upload failed: \(error)")
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}
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}
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}
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}
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}
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struct Thumbnails: View {
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@Bindable var attachments: Attachments
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var body: some View {
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HStack {
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ForEach(attachments.images) { img in
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ZStack(alignment: .topTrailing) {
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Image(nsImage: img.image)
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.resizable()
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.scaledToFit()
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.frame(width: 64, height: 64)
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Button("×") {
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attachments.images.removeAll { $0.id == img.id }
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}
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}
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}
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}
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.frame(height: attachments.images.isEmpty ? 0 : 64)
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}
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}
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struct ComposerSpike: View {
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@Environment(Server.self) private var server
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var body: some View {
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HStack(alignment: .top, spacing: 16) {
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SwiftUIComposer(attachments: Attachments(server: server, name: "TextEditor"))
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AppKitComposerPanel(attachments: Attachments(server: server, name: "NSTextView"))
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RoutedComposer(attachments: Attachments(server: server, name: "Routed"))
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}
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.padding(8)
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}
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}
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struct ComposerFocusKey: FocusedValueKey {
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typealias Value = Attachments
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}
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extension FocusedValues {
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var composer: Attachments? {
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get {
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self[ComposerFocusKey.self]
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}
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set {
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self[ComposerFocusKey.self] = newValue
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}
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}
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}
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struct PasteboardCommands: Commands {
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@FocusedValue(\.composer) private var composer
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var body: some Commands {
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CommandGroup(replacing: .pasteboard) {
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Button("Cut") {
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NSApp.sendAction(#selector(NSText.cut(_:)), to: nil, from: nil)
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}
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.keyboardShortcut("x")
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Button("Copy") {
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NSApp.sendAction(#selector(NSText.copy(_:)), to: nil, from: nil)
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}
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.keyboardShortcut("c")
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Button("Paste") {
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if let composer, composer.add(pasteboard: .general, from: "Edit ▸ Paste") {
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return
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}
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NSApp.sendAction(#selector(NSText.paste(_:)), to: nil, from: nil)
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}
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.keyboardShortcut("v")
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Button("Select All") {
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NSApp.sendAction(#selector(NSText.selectAll(_:)), to: nil, from: nil)
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}
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.keyboardShortcut("a")
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}
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}
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}
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struct RoutedComposer: View {
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@ViewState var attachments: Attachments
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@ViewState private var text = ""
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@ViewState private var overlayHits = false
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@ViewState private var targeted = false
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var body: some View {
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VStack(alignment: .leading) {
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Text("SwiftUI TextEditor, paste through Edit ▸ Paste, drop overlay")
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Toggle("Drop overlay takes hits (off: clicks pass through to the editor)", isOn: $overlayHits)
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Thumbnails(attachments: attachments)
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TextEditor(text: $text)
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.frame(minHeight: 160)
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.border(targeted ? Color.accentColor : Color.secondary.opacity(0.4))
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.focusedValue(\.composer, attachments)
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.onKeyPress(.return, phases: .down) { press in
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let marked = (NSApp.keyWindow?.firstResponder as? NSTextView)?.hasMarkedText() ?? false
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attachments.server.log("Routed: onKeyPress return, modifiers \(press.modifiers.rawValue), hasMarkedText \(marked)")
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if press.modifiers.contains(.shift) || marked {
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return .ignored
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}
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attachments.send(text)
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text = ""
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return .handled
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}
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.overlay {
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Color.clear
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.contentShape(Rectangle())
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.allowsHitTesting(overlayHits)
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.onDrop(of: [.image, .fileURL], isTargeted: $targeted) { providers in
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attachments.add(providers: providers, from: "overlay onDrop")
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return true
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}
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}
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.onChange(of: targeted) {
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attachments.server.log("Routed: overlay drop targeted \(targeted)")
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}
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}
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}
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}
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struct SwiftUIComposer: View {
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@ViewState var attachments: Attachments
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@ViewState private var text = ""
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@ViewState private var checkMarked = false
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var body: some View {
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VStack(alignment: .leading) {
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Text("SwiftUI TextEditor + onKeyPress, onPasteCommand, onDrop")
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Toggle("In onKeyPress, also ignore Return while the first responder hasMarkedText()", isOn: $checkMarked)
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Thumbnails(attachments: attachments)
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TextEditor(text: $text)
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.frame(minHeight: 160)
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.border(Color.secondary.opacity(0.4))
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.onKeyPress(.return, phases: .down) { press in
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let marked = (NSApp.keyWindow?.firstResponder as? NSTextView)?.hasMarkedText() ?? false
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attachments.server.log("TextEditor: onKeyPress return, modifiers \(press.modifiers.rawValue), hasMarkedText \(marked)")
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if press.modifiers.contains(.shift) {
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return .ignored
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}
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if checkMarked && marked {
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return .ignored
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}
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attachments.send(text)
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text = ""
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return .handled
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}
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.onPasteCommand(of: [.png, .jpeg, .gif, .webP, .tiff, .fileURL]) { providers in
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attachments.add(providers: providers, from: "onPasteCommand")
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}
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.onDrop(of: [.image, .fileURL], isTargeted: nil) { providers in
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attachments.add(providers: providers, from: "onDrop")
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return true
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}
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}
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}
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}
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struct AppKitComposerPanel: View {
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@ViewState var attachments: Attachments
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var body: some View {
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VStack(alignment: .leading) {
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Text("NSTextView in NSViewRepresentable")
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Text("doCommand(insertNewline:), paste(_:), performDragOperation")
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Thumbnails(attachments: attachments)
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AppKitComposer(attachments: attachments)
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.frame(minHeight: 160)
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.border(Color.secondary.opacity(0.4))
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}
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}
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}
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final class ComposerTextView: NSTextView {
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var attachments: Attachments!
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override func keyDown(with event: NSEvent) {
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if event.keyCode == 36 || event.keyCode == 76 {
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attachments.server.log("NSTextView: keyDown return, modifiers \(event.modifierFlags.intersection(.deviceIndependentFlagsMask).rawValue), hasMarkedText \(hasMarkedText())")
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}
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super.keyDown(with: event)
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}
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override func doCommand(by selector: Selector) {
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let shift = NSApp.currentEvent?.modifierFlags.contains(.shift) ?? false
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if selector == #selector(insertNewline(_:)) && !shift {
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attachments.send(string)
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string = ""
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return
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}
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if selector == #selector(insertNewline(_:)) {
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insertNewlineIgnoringFieldEditor(nil)
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return
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}
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super.doCommand(by: selector)
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}
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override func paste(_ sender: Any?) {
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if attachments.add(pasteboard: .general, from: "paste(_:)") {
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return
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}
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super.paste(sender)
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}
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override var readablePasteboardTypes: [NSPasteboard.PasteboardType] {
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super.readablePasteboardTypes + [.png, .tiff, .fileURL]
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}
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override func draggingEntered(_ sender: any NSDraggingInfo) -> NSDragOperation {
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if hasImage(sender.draggingPasteboard) {
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return .copy
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}
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return super.draggingEntered(sender)
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}
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override func draggingUpdated(_ sender: any NSDraggingInfo) -> NSDragOperation {
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if hasImage(sender.draggingPasteboard) {
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return .copy
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}
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return super.draggingUpdated(sender)
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}
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override func performDragOperation(_ sender: any NSDraggingInfo) -> Bool {
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if hasImage(sender.draggingPasteboard) {
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return attachments.add(pasteboard: sender.draggingPasteboard, from: "drop")
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}
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return super.performDragOperation(sender)
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}
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private func hasImage(_ pb: NSPasteboard) -> Bool {
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if let urls = pb.readObjects(forClasses: [NSURL.self], options: [.urlReadingFileURLsOnly: true]) as? [URL], !urls.isEmpty {
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return urls.contains { (try? Data(contentsOf: $0)).map { imageType($0) != nil || NSImage(data: $0) != nil } ?? false }
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}
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return pb.availableType(from: [.png, .tiff, NSPasteboard.PasteboardType(UTType.jpeg.identifier), NSPasteboard.PasteboardType(UTType.gif.identifier), NSPasteboard.PasteboardType(UTType.webP.identifier)]) != nil
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}
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}
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struct AppKitComposer: NSViewRepresentable {
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let attachments: Attachments
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func makeNSView(context: Context) -> NSScrollView {
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let scroll = NSScrollView()
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scroll.hasVerticalScroller = true
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let tv = ComposerTextView(frame: .zero)
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tv.attachments = attachments
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tv.isRichText = false
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tv.allowsUndo = true
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tv.font = Fonts.ct(13) as NSFont
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tv.minSize = .zero
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tv.maxSize = NSSize(width: CGFloat.greatestFiniteMagnitude, height: CGFloat.greatestFiniteMagnitude)
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tv.isVerticallyResizable = true
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tv.isHorizontallyResizable = false
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tv.autoresizingMask = [.width]
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tv.textContainer?.widthTracksTextView = true
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tv.registerForDraggedTypes([.png, .tiff, .fileURL])
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scroll.documentView = tv
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return scroll
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}
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func updateNSView(_ nsView: NSScrollView, context: Context) {}
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}
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