Merge pull request #75 from surfstudio/IDPT-715-add-baselineoffset

IDPT-715 Add baseLine offset and add method .add(attribute)
surfstudio · Apr 12, 2021 · d209af0 · d209af0
2 parents 9ae32d5 + aafea02
commit d209af0
Show file tree

Hide file tree

Showing 2 changed files with 72 additions and 0 deletions.
diff --git a/Utils/Utils/String/String+Attributes.swift b/Utils/Utils/String/String+Attributes.swift
@@ -25,6 +25,8 @@ public enum StringAttribute {
     case crossOut(style: CrossOutStyle)
     /// Text line break mode
     case lineBreakMode(NSLineBreakMode)
+    /// Text base line offset (vertical)
+    case baselineOffset(CGFloat)
 
     /// Figma friendly case means that lineSpacing = lineHeight - font.lineHeight
     /// This case provide possibility to set both `font` and `lineSpacing`
@@ -49,6 +51,17 @@ extension StringAttribute {
                 return NSUnderlineStyle.single
             }
         }
+
+        init?(with style: NSUnderlineStyle) {
+            switch style {
+            case .double:
+                self = .double
+            case .single:
+                self = .single
+            default:
+                return nil
+            }
+        }
     }
 }
 
@@ -67,6 +80,8 @@ extension StringAttribute {
             return NSAttributedString.Key.foregroundColor
         case .crossOut:
             return NSAttributedString.Key.strikethroughStyle
+        case .baselineOffset:
+            return NSAttributedString.Key.baselineOffset
         }
     }
 
@@ -88,7 +103,54 @@ extension StringAttribute {
             return style.coreValue.rawValue
         case .lineBreakMode(let value):
             return value
+        case .baselineOffset(let value):
+            return value
+        }
+    }
+}
+
+// MARK: - Public static methods
+
+public extension StringAttribute {
+
+    // init from attributs array
+    static func from(dictionary: [NSAttributedString.Key: Any]) -> [StringAttribute] {
+        var stringAttributedArray = [StringAttribute]()
+
+        if let baselineOffset = dictionary[.baselineOffset] as? CGFloat {
+            stringAttributedArray.append(.baselineOffset(baselineOffset))
         }
+
+        if let strikethroughStyle = dictionary[.strikethroughStyle] as? NSUnderlineStyle,
+           let crossOutStyle = CrossOutStyle(with: strikethroughStyle) {
+            stringAttributedArray.append(.crossOut(style: crossOutStyle))
+        }
+
+        if let foregroundColor = dictionary[.foregroundColor] as? UIColor {
+            stringAttributedArray.append(.foregroundColor(foregroundColor))
+        }
+
+        if let font = dictionary[.font] as? UIFont {
+            stringAttributedArray.append(.font(font))
+        }
+
+        if let kernValue = dictionary[.kern] as? CGFloat {
+            stringAttributedArray.append(.kern(kernValue))
+        }
+
+        if let value = dictionary[.paragraphStyle],
+           let mutableParagraphStyle = value as? NSMutableParagraphStyle {
+            stringAttributedArray.append(.aligment(mutableParagraphStyle.alignment))
+            stringAttributedArray.append(.lineBreakMode(mutableParagraphStyle.lineBreakMode))
+
+            if let font = dictionary[.font] as? UIFont {
+                stringAttributedArray.append(.lineHeight(mutableParagraphStyle.lineSpacing, font: font))
+            } else {
+                stringAttributedArray.append(.lineSpacing(mutableParagraphStyle.lineSpacing))
+            }
+        }
+
+        return stringAttributedArray
     }
 }
 

diff --git a/Utils/Utils/String/StringBuilder.swift b/Utils/Utils/String/StringBuilder.swift
@@ -142,6 +142,16 @@ public class StringBuilder {
         return self
     }
 
+    /// Method for adding global attributes with NSAttributedString
+    /// - Parameter globalAttributes: attributes to apply
+    @discardableResult
+    public func add(with nsAttribute: NSAttributedString) -> StringBuilder {
+        let attributes = nsAttribute.attributes(at: 0, effectiveRange: nil)
+        let stringAttributes = StringAttribute.from(dictionary: attributes)
+        self.add(.string(nsAttribute.string), with: stringAttributes)
+        return self
+    }
+
     /// Method for adding text block to attributed
     /// - Parameters:
     ///   - block: block to add