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Sources/ZNSTextAttachment/ZNSTextAttachmentDataSource.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| // | ||
| // ZNSTextAttachmentDataSource.swift | ||
| // | ||
| // | ||
| // Created by zhgchgli on 2023/3/5. | ||
| // | ||
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| import Foundation | ||
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| public protocol ZNSTextAttachmentDataSource: AnyObject { | ||
| func zNSTextAttachment(_ textAttachment: ZNSTextAttachment, loadImageURL imageURL: URL, completion: @escaping (Data) -> Void) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| // | ||
| // ZNSTextAttachmentDelegate.swift | ||
| // | ||
| // | ||
| // Created by zhgchgli on 2023/3/5. | ||
| // | ||
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| import Foundation | ||
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| public protocol ZNSTextAttachmentDelegate: AnyObject { | ||
| func zNSTextAttachment(didLoad textAttachment: ZNSTextAttachment) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| // | ||
| // ZNSTextAttachmentHandler.swift | ||
| // | ||
| // | ||
| // Created by zhgchgli on 2023/3/5. | ||
| // | ||
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| import Foundation | ||
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| public typealias ZNSTextAttachmentHandler = (ZNSTextAttachmentDataSource & ZNSTextAttachmentDelegate) |
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57 changes: 57 additions & 0 deletions
57
Sources/ZNSTextAttachment/iOS/ZResizableNSTextAttachment.swift
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| Original file line number | Diff line number | Diff line change |
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| // | ||
| // ZResizableNSTextAttachment.swift | ||
| // | ||
| // | ||
| // Created by zhgchgli on 2023/3/5. | ||
| // | ||
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| import Foundation | ||
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| #if canImport(UIKit) | ||
| import UIKit | ||
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| public class ZResizableNSTextAttachment: NSTextAttachment { | ||
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| public let imageSize: CGSize? | ||
| public let fixedWidth: CGFloat? | ||
| public let fixedHeight: CGFloat? | ||
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| public init(imageSize: CGSize?, fixedWidth: CGFloat?, fixedHeight: CGFloat?, data: Data, type: String) { | ||
| self.imageSize = imageSize | ||
| self.fixedWidth = fixedWidth | ||
| self.fixedHeight = fixedHeight | ||
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| super.init(data: data, ofType: type) | ||
| } | ||
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| required init?(coder: NSCoder) { | ||
| fatalError("init(coder:) has not been implemented") | ||
| } | ||
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| public override func attachmentBounds(for textContainer: NSTextContainer?, proposedLineFragment lineFrag: CGRect, glyphPosition position: CGPoint, characterIndex charIndex: Int) -> CGRect { | ||
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| if let fixedWidth = self.fixedWidth, | ||
| let fixedHeight = self.fixedHeight { | ||
| return CGRect(origin: .zero, size: CGSize(width: fixedWidth, height: fixedHeight)) | ||
| } | ||
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| guard let imageWidth = imageSize?.width, | ||
| let imageHeight = imageSize?.height else { | ||
| return .zero | ||
| } | ||
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| if let fixedWidth = self.fixedWidth { | ||
| let factor = fixedWidth / imageWidth | ||
| return CGRect(origin: .zero, size:CGSize(width: Int(fixedWidth), height: Int(imageHeight * factor))) | ||
| } else if let fixedHeight = self.fixedHeight { | ||
| let factor = fixedHeight / imageHeight | ||
| return CGRect(origin: .zero, size:CGSize(width: Int(imageWidth * factor), height: Int(fixedHeight))) | ||
| } else { | ||
| let maxWidth = lineFrag.size.width - ((textContainer?.lineFragmentPadding ?? 0) * 2) | ||
| let factor = maxWidth / imageWidth | ||
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| return CGRect(origin: .zero, size:CGSize(width: Int(imageWidth * factor), height: Int(imageHeight * factor))) | ||
| } | ||
| } | ||
| } | ||
| #endif |
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