Fix whitespace in statuses not being trimmed

Tusker.xcodeproj/project.pbxproj

@@ -2451,6 +2451,7 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				CODE_SIGN_STYLE = Automatic;
 				INFOPLIST_FILE = TuskerUITests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -2804,6 +2805,7 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				CODE_SIGN_STYLE = Automatic;
 				INFOPLIST_FILE = TuskerUITests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -2823,6 +2825,7 @@
 				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
 				CODE_SIGN_STYLE = Automatic;
 				INFOPLIST_FILE = TuskerUITests/Info.plist;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",

Tusker/Extensions/AttributedString+Helpers.swift

@@ -30,20 +30,31 @@ extension NSAttributedString {
 extension NSMutableAttributedString {
 
     func trimLeadingCharactersInSet(_ charSet: CharacterSet) {
-        var range = (string as NSString).rangeOfCharacter(from: charSet)
+        var end = string.startIndex
-
+        while end < string.endIndex && charSet.contains(string.unicodeScalars[end]) {
-        while range.length != 0 && range.location == 0 {
+            end = string.unicodeScalars.index(after: end)
-            replaceCharacters(in: range, with: "")
+        }
-            range = (string as NSString).rangeOfCharacter(from: charSet)
+        if end > string.startIndex {
+            let length = string.utf16.distance(from: string.startIndex, to: end)
+            replaceCharacters(in: NSRange(location: 0, length: length), with: "")
         }
     }
 
     func trimTrailingCharactersInSet(_ charSet: CharacterSet) {
-        var range = (string as NSString).rangeOfCharacter(from: charSet, options: .backwards)
+        if string.isEmpty {
-
+            return
-        while range.length != 0 && range.length + range.location == length {
+        }
-            replaceCharacters(in: range, with: "")
+        var start = string.index(before: string.endIndex)
-            range = (string as NSString).rangeOfCharacter(from: charSet, options: .backwards)
+        while start > string.startIndex && charSet.contains(string.unicodeScalars[start]) {
+            start = string.unicodeScalars.index(before: start)
+        }
+        if start < string.endIndex {
+            if start != string.startIndex || !charSet.contains(string.unicodeScalars[start]) {
+                start = string.unicodeScalars.index(after: start)
+            }
+            let location = string.utf16.distance(from: string.startIndex, to: start)
+            let length = string.utf16.distance(from: start, to: string.endIndex)
+            replaceCharacters(in: NSRange(location: location, length: length), with: "")
         }
     }
 

Tusker/Views/Status/ConversationMainStatusCollectionViewCell.swift

@@ -388,7 +388,11 @@ class ConversationMainStatusCollectionViewCell: UICollectionViewListCell, Status
         
         let html = translation?.content ?? status.content
         let attributedContent = ConversationMainStatusCollectionViewCell.htmlConverter.convert(html)
-        doUpdateUI(status: status, content: attributedContent)
+        let collapsedContent = NSMutableAttributedString(attributedString: attributedContent)
+        collapsedContent.collapseWhitespace()
+        collapsedContent.trimLeadingCharactersInSet(.whitespacesAndNewlines)
+        collapsedContent.trimTrailingCharactersInSet(.whitespacesAndNewlines)
+        doUpdateUI(status: status, content: collapsedContent)
         
         if !status.spoilerText.isEmpty,
            let translated = translation?.spoilerText {

Tusker/Views/Status/TimelineStatusCollectionViewCell.swift

@@ -616,7 +616,11 @@ class TimelineStatusCollectionViewCell: UICollectionViewListCell, StatusCollecti
         }
         
         let content = precomputedContent ?? TimelineStatusCollectionViewCell.htmlConverter.convert(status.content)
-        doUpdateUI(status: status, content: content)
+        let collapsedContent = NSMutableAttributedString(attributedString: content)
+        collapsedContent.collapseWhitespace()
+        collapsedContent.trimLeadingCharactersInSet(.whitespacesAndNewlines)
+        collapsedContent.trimTrailingCharactersInSet(.whitespacesAndNewlines)
+        doUpdateUI(status: status, content: collapsedContent)
         
         doUpdateTimestamp(status: status)
         timestampLabel.isHidden = showPinned

TuskerTests/AttributedStringHelperTests.swift

@@ -16,6 +16,36 @@ class AttributedStringHelperTests: XCTestCase {
 
     override func tearDown() {
     }
+    
+    func testTrimLeading() {
+        let a = NSMutableAttributedString(string: " a ")
+        a.trimLeadingCharactersInSet(.whitespaces)
+        XCTAssertEqual(a, NSAttributedString(string: "a "))
+        let b = NSMutableAttributedString(string: "  ")
+        b.trimLeadingCharactersInSet(.whitespaces)
+        XCTAssertEqual(b, NSAttributedString(string: ""))
+        let c = NSMutableAttributedString(string: "")
+        c.trimLeadingCharactersInSet(.whitespaces)
+        XCTAssertEqual(c, NSAttributedString(string: ""))
+        let d = NSMutableAttributedString(string: "abc")
+        d.trimLeadingCharactersInSet(.whitespaces)
+        XCTAssertEqual(d, NSAttributedString(string: "abc"))
+    }
+    
+    func testTrimTrailing() {
+        let a = NSMutableAttributedString(string: " a ")
+        a.trimTrailingCharactersInSet(.whitespaces)
+        XCTAssertEqual(a, NSAttributedString(string: " a"))
+        let b = NSMutableAttributedString(string: "  ")
+        b.trimTrailingCharactersInSet(.whitespaces)
+        XCTAssertEqual(b, NSAttributedString(string: ""))
+        let c = NSMutableAttributedString(string: "")
+        c.trimTrailingCharactersInSet(.whitespaces)
+        XCTAssertEqual(c, NSAttributedString(string: ""))
+        let d = NSMutableAttributedString(string: "abc")
+        d.trimTrailingCharactersInSet(.whitespaces)
+        XCTAssertEqual(d, NSAttributedString(string: "abc"))
+    }
 
     func testCollapsingWhitespace() {
         var str = NSAttributedString(string: "test 1\n")