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This commit is contained in:
Peter
2018-01-09 13:18:08 +04:00
parent 0f26dc36a7
commit 6a47e739a3
644 changed files with 34297 additions and 13580 deletions
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65
TelegramUI/TextNode.swift
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@@ -25,10 +25,34 @@ enum TextNodeCutoutPosition {
struct TextNodeCutout: Equatable {
let position: TextNodeCutoutPosition
let size: CGSize
static func ==(lhs: TextNodeCutout, rhs: TextNodeCutout) -> Bool {
return lhs.position == rhs.position && lhs.size == rhs.size
}
}
func ==(lhs: TextNodeCutout, rhs: TextNodeCutout) -> Bool {
return lhs.position == rhs.position && lhs.size == rhs.size
final class TextNodeLayoutArguments {
let attributedString: NSAttributedString?
let backgroundColor: UIColor?
let maximumNumberOfLines: Int
let truncationType: CTLineTruncationType
let constrainedSize: CGSize
let alignment: NSTextAlignment
let lineSpacing: CGFloat
let cutout: TextNodeCutout?
let insets: UIEdgeInsets
init(attributedString: NSAttributedString?, backgroundColor: UIColor? = nil, maximumNumberOfLines: Int, truncationType: CTLineTruncationType, constrainedSize: CGSize, alignment: NSTextAlignment = .natural, lineSpacing: CGFloat = 0.12, cutout: TextNodeCutout? = nil, insets: UIEdgeInsets = UIEdgeInsets()) {
self.attributedString = attributedString
self.backgroundColor = backgroundColor
self.maximumNumberOfLines = maximumNumberOfLines
self.truncationType = truncationType
self.constrainedSize = constrainedSize
self.alignment = alignment
self.lineSpacing = lineSpacing
self.cutout = cutout
self.insets = insets
}
}
final class TextNodeLayout: NSObject {
@@ -38,18 +62,20 @@ final class TextNodeLayout: NSObject {
fileprivate let backgroundColor: UIColor?
fileprivate let constrainedSize: CGSize
fileprivate let alignment: NSTextAlignment
fileprivate let lineSpacing: CGFloat
fileprivate let cutout: TextNodeCutout?
fileprivate let insets: UIEdgeInsets
let size: CGSize
fileprivate let firstLineOffset: CGFloat
fileprivate let lines: [TextNodeLine]
fileprivate init(attributedString: NSAttributedString?, maximumNumberOfLines: Int, truncationType: CTLineTruncationType, constrainedSize: CGSize, alignment: NSTextAlignment, cutout: TextNodeCutout?, insets: UIEdgeInsets, size: CGSize, firstLineOffset: CGFloat, lines: [TextNodeLine], backgroundColor: UIColor?) {
fileprivate init(attributedString: NSAttributedString?, maximumNumberOfLines: Int, truncationType: CTLineTruncationType, constrainedSize: CGSize, alignment: NSTextAlignment, lineSpacing: CGFloat, cutout: TextNodeCutout?, insets: UIEdgeInsets, size: CGSize, firstLineOffset: CGFloat, lines: [TextNodeLine], backgroundColor: UIColor?) {
self.attributedString = attributedString
self.maximumNumberOfLines = maximumNumberOfLines
self.truncationType = truncationType
self.constrainedSize = constrainedSize
self.alignment = alignment
self.lineSpacing = lineSpacing
self.cutout = cutout
self.insets = insets
self.size = size
@@ -214,7 +240,7 @@ final class TextNode: ASDisplayNode {
}
}
private class func calculateLayout(attributedString: NSAttributedString?, maximumNumberOfLines: Int, truncationType: CTLineTruncationType, backgroundColor: UIColor?, constrainedSize: CGSize, alignment: NSTextAlignment, cutout: TextNodeCutout?, insets: UIEdgeInsets) -> TextNodeLayout {
private class func calculateLayout(attributedString: NSAttributedString?, maximumNumberOfLines: Int, truncationType: CTLineTruncationType, backgroundColor: UIColor?, constrainedSize: CGSize, alignment: NSTextAlignment, lineSpacingFactor: CGFloat, cutout: TextNodeCutout?, insets: UIEdgeInsets) -> TextNodeLayout {
if let attributedString = attributedString {
let stringLength = attributedString.length
@@ -232,14 +258,14 @@ final class TextNode: ASDisplayNode {
let fontAscent = CTFontGetAscent(font)
let fontDescent = CTFontGetDescent(font)
let fontLineHeight = floor(fontAscent + fontDescent)
let fontLineSpacing = floor(fontLineHeight * 0.12)
let fontLineSpacing = floor(fontLineHeight * lineSpacingFactor)
var lines: [TextNodeLine] = []
var maybeTypesetter: CTTypesetter?
maybeTypesetter = CTTypesetterCreateWithAttributedString(attributedString as CFAttributedString)
if maybeTypesetter == nil {
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, alignment: alignment, cutout: cutout, insets: insets, size: CGSize(), firstLineOffset: 0.0, lines: [], backgroundColor: backgroundColor)
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, alignment: alignment, lineSpacing: lineSpacingFactor, cutout: cutout, insets: insets, size: CGSize(), firstLineOffset: 0.0, lines: [], backgroundColor: backgroundColor)
}
let typesetter = maybeTypesetter!
@@ -267,7 +293,8 @@ final class TextNode: ASDisplayNode {
var first = true
while true {
var lineConstrainedWidth = constrainedSize.width
var lineOriginY = floorToScreenPixels(layoutSize.height + fontLineHeight - fontLineSpacing * 2.0)
//var lineOriginY = floorToScreenPixels(layoutSize.height + fontLineHeight - fontLineSpacing * 2.0)
var lineOriginY = floorToScreenPixels(layoutSize.height + fontAscent)
if !first {
lineOriginY += fontLineSpacing
}
@@ -321,7 +348,7 @@ final class TextNode: ASDisplayNode {
coreTextLine = CTLineCreateTruncatedLine(originalLine, Double(constrainedSize.width), truncationType, truncationToken) ?? truncationToken
}
let lineWidth = ceil(CGFloat(CTLineGetTypographicBounds(coreTextLine, nil, nil, nil) - CTLineGetTrailingWhitespaceWidth(coreTextLine)))
let lineWidth = min(constrainedSize.width, ceil(CGFloat(CTLineGetTypographicBounds(coreTextLine, nil, nil, nil) - CTLineGetTrailingWhitespaceWidth(coreTextLine))))
let lineFrame = CGRect(x: lineCutoutOffset, y: lineOriginY, width: lineWidth, height: fontLineHeight)
layoutSize.height += fontLineHeight + fontLineSpacing
layoutSize.width = max(layoutSize.width, lineWidth + lineAdditionalWidth)
@@ -356,9 +383,9 @@ final class TextNode: ASDisplayNode {
}
}
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, alignment: alignment, cutout: cutout, insets: insets, size: CGSize(width: ceil(layoutSize.width) + insets.left + insets.right, height: ceil(layoutSize.height) + insets.top + insets.bottom), firstLineOffset: firstLineOffset, lines: lines, backgroundColor: backgroundColor)
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, alignment: alignment, lineSpacing: lineSpacingFactor, cutout: cutout, insets: insets, size: CGSize(width: ceil(layoutSize.width) + insets.left + insets.right, height: ceil(layoutSize.height) + insets.top + insets.bottom), firstLineOffset: firstLineOffset, lines: lines, backgroundColor: backgroundColor)
} else {
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, alignment: alignment, cutout: cutout, insets: insets, size: CGSize(), firstLineOffset: 0.0, lines: [], backgroundColor: backgroundColor)
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, alignment: alignment, lineSpacing: lineSpacingFactor, cutout: cutout, insets: insets, size: CGSize(), firstLineOffset: 0.0, lines: [], backgroundColor: backgroundColor)
}
}
@@ -418,30 +445,30 @@ final class TextNode: ASDisplayNode {
context.setBlendMode(.normal)
}
class func asyncLayout(_ maybeNode: TextNode?) -> (_ attributedString: NSAttributedString?, _ backgroundColor: UIColor?, _ maximumNumberOfLines: Int, _ truncationType: CTLineTruncationType, _ constrainedSize: CGSize, _ alignment: NSTextAlignment, _ cutout: TextNodeCutout?, _ insets: UIEdgeInsets) -> (TextNodeLayout, () -> TextNode) {
class func asyncLayout(_ maybeNode: TextNode?) -> (TextNodeLayoutArguments) -> (TextNodeLayout, () -> TextNode) {
let existingLayout: TextNodeLayout? = maybeNode?.cachedLayout
return { attributedString, backgroundColor, maximumNumberOfLines, truncationType, constrainedSize, alignment, cutout, insets in
return { arguments in
let layout: TextNodeLayout
var updated = false
if let existingLayout = existingLayout, existingLayout.constrainedSize == constrainedSize && existingLayout.maximumNumberOfLines == maximumNumberOfLines && existingLayout.truncationType == truncationType && existingLayout.cutout == cutout && existingLayout.alignment == alignment {
if let existingLayout = existingLayout, existingLayout.constrainedSize == arguments.constrainedSize && existingLayout.maximumNumberOfLines == arguments.maximumNumberOfLines && existingLayout.truncationType == arguments.truncationType && existingLayout.cutout == arguments.cutout && existingLayout.alignment == arguments.alignment && existingLayout.lineSpacing.isEqual(to: arguments.lineSpacing) {
let stringMatch: Bool
var colorMatch: Bool = true
if let backgroundColor = backgroundColor, let previousBackgroundColor = existingLayout.backgroundColor {
if let backgroundColor = arguments.backgroundColor, let previousBackgroundColor = existingLayout.backgroundColor {
if !backgroundColor.isEqual(previousBackgroundColor) {
colorMatch = false
}
} else if (backgroundColor != nil) != (existingLayout.backgroundColor != nil) {
} else if (arguments.backgroundColor != nil) != (existingLayout.backgroundColor != nil) {
colorMatch = false
}
if !colorMatch {
stringMatch = false
} else if let existingString = existingLayout.attributedString, let string = attributedString {
} else if let existingString = existingLayout.attributedString, let string = arguments.attributedString {
stringMatch = existingString.isEqual(to: string)
} else if existingLayout.attributedString == nil && attributedString == nil {
} else if existingLayout.attributedString == nil && arguments.attributedString == nil {
stringMatch = true
} else {
stringMatch = false
@@ -450,11 +477,11 @@ final class TextNode: ASDisplayNode {
if stringMatch {
layout = existingLayout
} else {
layout = TextNode.calculateLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, backgroundColor: backgroundColor, constrainedSize: constrainedSize, alignment: alignment, cutout: cutout, insets: insets)
layout = TextNode.calculateLayout(attributedString: arguments.attributedString, maximumNumberOfLines: arguments.maximumNumberOfLines, truncationType: arguments.truncationType, backgroundColor: arguments.backgroundColor, constrainedSize: arguments.constrainedSize, alignment: arguments.alignment, lineSpacingFactor: arguments.lineSpacing, cutout: arguments.cutout, insets: arguments.insets)
updated = true
}
} else {
layout = TextNode.calculateLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, backgroundColor: backgroundColor, constrainedSize: constrainedSize, alignment: alignment, cutout: cutout, insets: insets)
layout = TextNode.calculateLayout(attributedString: arguments.attributedString, maximumNumberOfLines: arguments.maximumNumberOfLines, truncationType: arguments.truncationType, backgroundColor: arguments.backgroundColor, constrainedSize: arguments.constrainedSize, alignment: arguments.alignment, lineSpacingFactor: arguments.lineSpacing, cutout: arguments.cutout, insets: arguments.insets)
updated = true
}