Temp

submodules/Display/Source/SubstringSearch.swift

@@ -0,0 +1,43 @@
+import UIKit
+
+public func findSubstringRanges(in string: String, query: String) -> ([Range<String.Index>], String) {
+    var ranges: [Range<String.Index>] = []
+    let queryWords = query.split { !$0.isLetter && !$0.isNumber && $0 != "#" && $0 != "@" }.filter { !$0.isEmpty && !["#", "@"].contains($0) }.map { $0.lowercased() }
+    
+    let text = string.lowercased()
+    let searchRange = text.startIndex ..< text.endIndex
+    text.enumerateSubstrings(in: searchRange, options: .byWords) { (substring, range, _, _) in
+        guard let substring = substring else {
+            return
+        }
+        for var word in queryWords {
+            var count = 0
+            var hasLeadingSymbol = false
+            if word.hasPrefix("#") || word.hasPrefix("@") {
+                hasLeadingSymbol = true
+                word.removeFirst()
+            }
+            inner: for (c1, c2) in zip(word, substring) {
+                if c1 != c2 {
+                    break inner
+                }
+                count += 1
+            }
+            if count > 0 {
+                let length = Double(max(word.count, substring.count))
+                if length > 0 {
+                    let difference = abs(length - Double(count))
+                    let rating = difference / length
+                    if rating < 0.33 {
+                        var range = range
+                        if hasLeadingSymbol && range.lowerBound > searchRange.lowerBound {
+                            range = text.index(before: range.lowerBound)..<range.upperBound
+                        }
+                        ranges.append(range)
+                    }
+                }
+            }
+        }
+    }
+    return (ranges, text)
+}