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Fix intersecting font attributes display

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This commit is contained in:
Ilya Laktyushin 2022-03-11 18:40:29 +04:00
parent 3f8df7776f
commit b01d67574c
1 changed files with 48 additions and 12 deletions
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60
submodules/TextFormat/Sources/StringWithAppliedEntities.swift
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@ -251,20 +251,56 @@ public func stringWithAppliedEntities(_ text: String, entities: [MessageTextEnti
break
}
var addedAttributes: [(NSRange, ChatTextFontAttributes)] = []
func addFont(ranges: [NSRange], fontAttributes: ChatTextFontAttributes) {
for range in ranges {
var font: UIFont?
if fontAttributes == [.bold, .italic] {
font = boldItalicFont
} else if fontAttributes == [.bold] {
font = boldFont
addedAttributes.append((range, fontAttributes))
} else if fontAttributes == [.italic] {
font = italicFont
addedAttributes.append((range, fontAttributes))
}
if let font = font {
string.addAttribute(NSAttributedString.Key.font, value: font, range: range)
}
}
}
for (range, fontAttributes) in fontAttributes {
var font: UIFont?
if fontAttributes.contains(.blockQuote) {
font = blockQuoteFont
} else if fontAttributes == [.bold, .italic] {
font = boldItalicFont
} else if fontAttributes == [.bold] {
font = boldFont
} else if fontAttributes == [.italic] {
font = italicFont
}
if let font = font {
string.addAttribute(NSAttributedString.Key.font, value: font, range: range)
var ranges = [range]
var fontAttributes = fontAttributes
if fontAttributes != [.bold, .italic] {
for (existingRange, existingAttributes) in addedAttributes {
if let intersection = existingRange.intersection(range) {
if intersection.length == range.length {
if existingAttributes == .bold || existingAttributes == .italic {
fontAttributes.insert(existingAttributes)
}
} else {
var fontAttributes = fontAttributes
if existingAttributes == .bold || existingAttributes == .italic {
fontAttributes.insert(existingAttributes)
}
addFont(ranges: [intersection], fontAttributes: fontAttributes)
ranges = []
if range.upperBound > existingRange.lowerBound {
ranges.append(NSRange(location: range.lowerBound, length: existingRange.lowerBound - range.lowerBound))
}
if range.upperBound > existingRange.upperBound {
ranges.append(NSRange(location: existingRange.upperBound, length: range.upperBound - existingRange.upperBound))
}
}
break
}
}
}
addFont(ranges: ranges, fontAttributes: fontAttributes)
}
}
return string