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morluto
cc90771af1
BREAKING CHANGE: Accessibility node value can also be a JSON number or boolean. Strings and null retain their prior meaning.
27 lines
1.2 KiB
Swift
27 lines
1.2 KiB
Swift
import Foundation
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import CoreFoundation
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struct AccessibilityValue {
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let value: Any
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let gap: String?
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}
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/** Preserve JSON scalars; report successful reads that JSON cannot represent faithfully. */
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func captureAccessibilityValue(_ source: Any?) -> AccessibilityValue {
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guard let source else { return AccessibilityValue(value: NSNull(), gap: nil) }
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if let text = source as? String { return AccessibilityValue(value: text, gap: nil) }
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if let number = source as? NSNumber {
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if CFGetTypeID(number) == CFBooleanGetTypeID() {
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return AccessibilityValue(value: number.boolValue, gap: nil)
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}
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let value = number.doubleValue
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let encoding = String(cString: number.objCType)
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let floating = encoding == "f" || encoding == "d"
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if number is NSDecimalNumber || !value.isFinite || (value == 0 && value.sign == .minus) || (!floating && abs(value) > 9_007_199_254_740_991) {
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return AccessibilityValue(value: NSNull(), gap: "AXValue number \(number.stringValue) cannot be represented faithfully as a JSON number")
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}
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return AccessibilityValue(value: number, gap: nil)
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}
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return AccessibilityValue(value: NSNull(), gap: "AXValue type \(type(of: source)) is not a supported JSON scalar")
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}
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