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CocoaExtension // Fix NSAttributedString.boundingDimension.

This commit is contained in:
ShikiSuen 2023-07-22 22:26:12 +08:00
parent dcff84c482
commit b579bdca57
1 changed files with 14 additions and 15 deletions
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29
Packages/vChewing_CocoaExtension/Sources/CocoaExtension/CocoaExtension_Misc.swift
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@ -49,22 +49,21 @@ public extension NSSize {
// Ref: https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/TextLayout/Tasks/StringHeight.html
public extension NSAttributedString {
private static let tmpTextStorage = NSTextStorage()
private static let tmpLayoutManager = NSLayoutManager()
private static let tmpTextContainer = NSTextContainer()
@objc var boundingDimension: NSSize {
let rectA = boundingRect(
with: NSSize(width: Double.infinity, height: Double.infinity),
options: [.usesLineFragmentOrigin, .usesFontLeading]
)
let textStorage = NSTextStorage(attributedString: self)
let textContainer = NSTextContainer()
let layoutManager = NSLayoutManager()
layoutManager.addTextContainer(textContainer)
textStorage.addLayoutManager(layoutManager)
textContainer.lineFragmentPadding = 0.0
layoutManager.glyphRange(for: textContainer)
let rectB = layoutManager.usedRect(for: textContainer)
let width = ceil(max(rectA.width, rectB.width))
let height = ceil(max(rectA.height, rectB.height))
return .init(width: width, height: height)
Self.tmpTextStorage.setAttributedString(self)
if Self.tmpLayoutManager.textContainers.isEmpty || Self.tmpLayoutManager.textContainers.first !== Self.tmpTextContainer {
Self.tmpLayoutManager.addTextContainer(Self.tmpTextContainer)
}
if Self.tmpTextStorage.layoutManagers.isEmpty || Self.tmpTextStorage.layoutManagers.first !== Self.tmpLayoutManager {
Self.tmpTextStorage.addLayoutManager(Self.tmpLayoutManager)
}
Self.tmpTextContainer.lineFragmentPadding = 0
Self.tmpLayoutManager.glyphRange(for: Self.tmpTextContainer)
return Self.tmpLayoutManager.usedRect(for: Self.tmpTextContainer).size
}
}