Ely Office: six offline-first desktop apps in Rust and GPUI

ElyDoc, ElyTable, ElyShow (LibreOfficeKit), ElyPDF (MuPDF), ElyTree (Git),
ElyMark (Milkdown and CodeMirror in CEF). ElyMail and ElyAgent follow.

tests/scripts/drop.swift

@@ -0,0 +1,59 @@
+// Drags a file from its window onto x, y.
+import AppKit
+
+let args = CommandLine.arguments
+let file = URL(fileURLWithPath: args[1])
+let target = CGPoint(x: Double(args[2])!, y: Double(args[3])!)
+let start = CGPoint(x: 60, y: 60)
+
+final class Source: NSView, NSDraggingSource {
+    func draggingSession(_: NSDraggingSession, sourceOperationMaskFor _: NSDraggingContext) -> NSDragOperation {
+        .copy
+    }
+
+    func draggingSession(_: NSDraggingSession, endedAt _: NSPoint, operation: NSDragOperation) {
+        print(operation.isEmpty ? "refused" : "dropped")
+        exit(0)
+    }
+
+    override func acceptsFirstMouse(for _: NSEvent?) -> Bool {
+        true
+    }
+
+    override func mouseDown(with event: NSEvent) {
+        let item = NSDraggingItem(pasteboardWriter: file as NSURL)
+        item.setDraggingFrame(bounds, contents: NSImage(size: bounds.size))
+        beginDraggingSession(with: [item], event: event, source: self)
+    }
+}
+
+func post(_ type: CGEventType, _ at: CGPoint) {
+    CGEvent(mouseEventSource: nil, mouseType: type, mouseCursorPosition: at, mouseButton: .left)?
+        .post(tap: .cghidEventTap)
+    usleep(40000)
+}
+
+let app = NSApplication.shared
+app.setActivationPolicy(.accessory)
+let height = NSScreen.screens[0].frame.height
+let frame = NSRect(x: start.x - 20, y: height - start.y - 20, width: 40, height: 40)
+let window = NSWindow(contentRect: frame, styleMask: .borderless, backing: .buffered, defer: false)
+window.contentView = Source(frame: NSRect(x: 0, y: 0, width: 40, height: 40))
+window.level = .floating
+window.orderFrontRegardless()
+DispatchQueue.global().asyncAfter(deadline: .now() + 0.5) {
+    post(.mouseMoved, start)
+    post(.leftMouseDown, start)
+    for step in 1...30 {
+        let t = Double(step) / 30
+        post(.leftMouseDragged, CGPoint(x: start.x + (target.x - start.x) * t, y: start.y + (target.y - start.y) * t))
+    }
+    usleep(300000)
+    post(.leftMouseDragged, target)
+    post(.leftMouseUp, target)
+}
+DispatchQueue.main.asyncAfter(deadline: .now() + 10) {
+    print("timeout")
+    exit(1)
+}
+app.run()