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This commit is contained in:
Peter
2017-03-23 21:27:34 +03:00
parent 2707eea1c3
commit d057bc1f6a
73 changed files with 836 additions and 151 deletions
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32
TelegramUI/TextNode.swift
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@@ -36,15 +36,17 @@ final class TextNodeLayout: NSObject {
fileprivate let truncationType: CTLineTruncationType
fileprivate let backgroundColor: UIColor?
fileprivate let constrainedSize: CGSize
fileprivate let alignment: NSTextAlignment
fileprivate let cutout: TextNodeCutout?
let size: CGSize
fileprivate let lines: [TextNodeLine]
fileprivate init(attributedString: NSAttributedString?, maximumNumberOfLines: Int, truncationType: CTLineTruncationType, constrainedSize: CGSize, cutout: TextNodeCutout?, size: CGSize, lines: [TextNodeLine], backgroundColor: UIColor?) {
fileprivate init(attributedString: NSAttributedString?, maximumNumberOfLines: Int, truncationType: CTLineTruncationType, constrainedSize: CGSize, alignment: NSTextAlignment, cutout: TextNodeCutout?, size: CGSize, lines: [TextNodeLine], backgroundColor: UIColor?) {
self.attributedString = attributedString
self.maximumNumberOfLines = maximumNumberOfLines
self.truncationType = truncationType
self.constrainedSize = constrainedSize
self.alignment = alignment
self.cutout = cutout
self.size = size
self.lines = lines
@@ -125,7 +127,7 @@ final class TextNode: ASDisplayNode {
}
}
private class func calculateLayout(attributedString: NSAttributedString?, maximumNumberOfLines: Int, truncationType: CTLineTruncationType, backgroundColor: UIColor?, constrainedSize: CGSize, cutout: TextNodeCutout?) -> TextNodeLayout {
private class func calculateLayout(attributedString: NSAttributedString?, maximumNumberOfLines: Int, truncationType: CTLineTruncationType, backgroundColor: UIColor?, constrainedSize: CGSize, alignment: NSTextAlignment, cutout: TextNodeCutout?) -> TextNodeLayout {
if let attributedString = attributedString {
let stringLength = attributedString.length
@@ -150,7 +152,7 @@ final class TextNode: ASDisplayNode {
var maybeTypesetter: CTTypesetter?
maybeTypesetter = CTTypesetterCreateWithAttributedString(attributedString as CFAttributedString)
if maybeTypesetter == nil {
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, cutout: cutout, size: CGSize(), lines: [], backgroundColor: backgroundColor)
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, alignment: alignment, cutout: cutout, size: CGSize(), lines: [], backgroundColor: backgroundColor)
}
let typesetter = maybeTypesetter!
@@ -253,9 +255,9 @@ final class TextNode: ASDisplayNode {
}
}
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, cutout: cutout, size: CGSize(width: ceil(layoutSize.width), height: ceil(layoutSize.height)), lines: lines, backgroundColor: backgroundColor)
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, alignment: alignment, cutout: cutout, size: CGSize(width: ceil(layoutSize.width), height: ceil(layoutSize.height)), lines: lines, backgroundColor: backgroundColor)
} else {
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, cutout: cutout, size: CGSize(), lines: [], backgroundColor: backgroundColor)
return TextNodeLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, constrainedSize: constrainedSize, alignment: alignment, cutout: cutout, size: CGSize(), lines: [], backgroundColor: backgroundColor)
}
}
@@ -292,9 +294,17 @@ final class TextNode: ASDisplayNode {
//let clipRect = CGContextGetClipBoundingBox(context)
let alignment = layout.alignment
for i in 0 ..< layout.lines.count {
let line = layout.lines[i]
context.textPosition = CGPoint(x: line.frame.origin.x, y: line.frame.origin.y)
let lineOffset: CGFloat
if alignment == .center {
lineOffset = floor((bounds.size.width - line.frame.size.width) / 2.0)
} else {
lineOffset = 0.0
}
context.textPosition = CGPoint(x: line.frame.origin.x + lineOffset, y: line.frame.origin.y)
CTLineDraw(line.line, context)
}
@@ -306,14 +316,14 @@ final class TextNode: ASDisplayNode {
context.setBlendMode(.normal)
}
class func asyncLayout(_ maybeNode: TextNode?) -> (_ attributedString: NSAttributedString?, _ backgroundColor: UIColor?, _ maximumNumberOfLines: Int, _ truncationType: CTLineTruncationType, _ constrainedSize: CGSize, _ cutout: TextNodeCutout?) -> (TextNodeLayout, () -> TextNode) {
class func asyncLayout(_ maybeNode: TextNode?) -> (_ attributedString: NSAttributedString?, _ backgroundColor: UIColor?, _ maximumNumberOfLines: Int, _ truncationType: CTLineTruncationType, _ constrainedSize: CGSize, _ alignment: NSTextAlignment, _ cutout: TextNodeCutout?) -> (TextNodeLayout, () -> TextNode) {
let existingLayout: TextNodeLayout? = maybeNode?.cachedLayout
return { attributedString, backgroundColor, maximumNumberOfLines, truncationType, constrainedSize, cutout in
return { attributedString, backgroundColor, maximumNumberOfLines, truncationType, constrainedSize, alignment, cutout in
let layout: TextNodeLayout
var updated = false
if let existingLayout = existingLayout, existingLayout.constrainedSize == constrainedSize && existingLayout.maximumNumberOfLines == maximumNumberOfLines && existingLayout.truncationType == truncationType && existingLayout.cutout == cutout {
if let existingLayout = existingLayout, existingLayout.constrainedSize == constrainedSize && existingLayout.maximumNumberOfLines == maximumNumberOfLines && existingLayout.truncationType == truncationType && existingLayout.cutout == cutout && existingLayout.alignment == alignment {
let stringMatch: Bool
var colorMatch: Bool = true
@@ -338,11 +348,11 @@ final class TextNode: ASDisplayNode {
if stringMatch {
layout = existingLayout
} else {
layout = TextNode.calculateLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, backgroundColor: backgroundColor, constrainedSize: constrainedSize, cutout: cutout)
layout = TextNode.calculateLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, backgroundColor: backgroundColor, constrainedSize: constrainedSize, alignment: alignment, cutout: cutout)
updated = true
}
} else {
layout = TextNode.calculateLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, backgroundColor: backgroundColor, constrainedSize: constrainedSize, cutout: cutout)
layout = TextNode.calculateLayout(attributedString: attributedString, maximumNumberOfLines: maximumNumberOfLines, truncationType: truncationType, backgroundColor: backgroundColor, constrainedSize: constrainedSize, alignment: alignment, cutout: cutout)
updated = true
}