Get full context

Keyboard.swift

// Grab everything before the cursor
var before = textDocumentProxy.documentContextBeforeInput

var completePriorString = ""
while let beforeInput = before, !beforeInput.isEmpty {
    completePriorString = beforeInput

    let length = beforeInput.lengthOfBytes(using: String.Encoding.utf8)

    textDocumentProxy.adjustTextPosition(byCharacterOffset: -length)
    Thread.sleep(forTimeInterval: 0.01)
    before = textDocumentProxy.documentContextBeforeInput
}

// Move the cursor back to the original position
textDocumentProxy
    .adjustTextPosition(byCharacterOffset: completePriorString.count)
Thread.sleep(forTimeInterval: 0.01)