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// SPDX-License-Identifier: MIT
// Copyright © 2018-2019 WireGuard LLC. All Rights Reserved.
import Cocoa
private let fontSize: CGFloat = 15
class ConfTextStorage: NSTextStorage {
struct TextColorTheme {
let plainText: NSColor
let sections: NSColor
let keyType: NSColor
let key: NSColor
let url: NSColor
let urlAttribute: NSColor
let comments: NSColor
let number: NSColor
let error: NSColor
}
let defaultFont = NSFontManager.shared.convertWeight(true, of: NSFont.systemFont(ofSize: fontSize))
private let boldFont = NSFont.boldSystemFont(ofSize: fontSize)
private lazy var italicFont = NSFontManager.shared.convert(defaultFont, toHaveTrait: .italicFontMask)
private var defaultAttributes: [NSAttributedString.Key: Any]! //swiftlint:disable:this implicitly_unwrapped_optional
private var highlightAttributes: [UInt32: [NSAttributedString.Key: Any]]! //swiftlint:disable:this implicitly_unwrapped_optional
private let backingStore: NSMutableAttributedString
private(set) var hasError = false
private(set) var privateKeyString: String?
override init() {
backingStore = NSMutableAttributedString(string: "")
super.init()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
required init?(pasteboardPropertyList propertyList: Any, ofType type: NSPasteboard.PasteboardType) {
fatalError("init(pasteboardPropertyList:ofType:) has not been implemented")
}
//swiftlint:disable:next function_body_length
func updateAttributes(for theme: TextColorTheme) {
self.defaultAttributes = [
.foregroundColor: theme.plainText,
.font: defaultFont
]
self.highlightAttributes = [
HighlightSection.rawValue: [
.foregroundColor: theme.sections,
.font: boldFont
],
HighlightField.rawValue: [
.foregroundColor: theme.keyType,
.font: boldFont
],
HighlightPublicKey.rawValue: [
.foregroundColor: theme.key,
.font: defaultFont
],
HighlightPrivateKey.rawValue: [
.foregroundColor: theme.key,
.font: defaultFont
],
HighlightPresharedKey.rawValue: [
.foregroundColor: theme.key,
.font: defaultFont
],
HighlightIP.rawValue: [
.foregroundColor: theme.url,
.font: defaultFont
],
HighlightCidr.rawValue: [
.foregroundColor: theme.urlAttribute,
.font: defaultFont
],
HighlightHost.rawValue: [
.foregroundColor: theme.url,
.font: defaultFont
],
HighlightPort.rawValue: [
.foregroundColor: theme.urlAttribute,
.font: defaultFont
],
HighlightMTU.rawValue: [
.foregroundColor: theme.number,
.font: defaultFont
],
HighlightKeepalive.rawValue: [
.foregroundColor: theme.number,
.font: defaultFont
],
HighlightComment.rawValue: [
.foregroundColor: theme.comments,
.font: italicFont
],
HighlightDelimiter.rawValue: [
.foregroundColor: theme.plainText,
.font: defaultFont
],
HighlightError.rawValue: [
.foregroundColor: theme.error,
.font: defaultFont,
.underlineStyle: 1
]
]
highlightSyntax()
}
override var string: String {
return backingStore.string
}
override func attributes(at location: Int, effectiveRange range: NSRangePointer?) -> [NSAttributedString.Key: Any] {
return backingStore.attributes(at: location, effectiveRange: range)
}
override func replaceCharacters(in range: NSRange, with str: String) {
beginEditing()
backingStore.replaceCharacters(in: range, with: str)
edited(.editedCharacters, range: range, changeInLength: str.count - range.length)
endEditing()
}
override func replaceCharacters(in range: NSRange, with attrString: NSAttributedString) {
beginEditing()
backingStore.replaceCharacters(in: range, with: attrString)
edited(.editedCharacters, range: range, changeInLength: attrString.length - range.length)
endEditing()
}
override func setAttributes(_ attrs: [NSAttributedString.Key: Any]?, range: NSRange) {
beginEditing()
backingStore.setAttributes(attrs, range: range)
edited(.editedAttributes, range: range, changeInLength: 0)
endEditing()
}
func highlightSyntax() {
hasError = false
privateKeyString = nil
backingStore.beginEditing()
var spans = highlight_config(backingStore.string.cString(using: String.Encoding.utf8))!
while spans.pointee.type != HighlightEnd {
let span = spans.pointee
let attributes = self.highlightAttributes[span.type.rawValue] ?? defaultAttributes
backingStore.setAttributes(attributes, range: NSRange(location: span.start, length: span.len))
if span.type == HighlightError {
hasError = true
}
if span.type == HighlightPrivateKey {
privateKeyString = backingStore.attributedSubstring(from: NSRange(location: span.start, length: span.len)).string
}
spans = spans.successor()
}
backingStore.endEditing()
beginEditing()
edited(.editedAttributes, range: NSRange(location: 0, length: (backingStore.string as NSString).length), changeInLength: 0)
endEditing()
}
}
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