[ASTextNode2] Add improved support for all line-break modes in experimental text node.

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## master
 * Add your own contributions to the next release on the line below this with your name.
+- [ASTextNode2] Add improved support for all line-break modes in experimental text node. [Kevin Smith](https://github.com/wiseoldduck). [#1150](https://github.com/TextureGroup/Texture/pull/1150)
 - [ASExperimentalFeatures.m] Fix mismatch name in experimental features. [Max Wang](https://github.com/wsdwsd0829). [#1159](https://github.com/TextureGroup/Texture/pull/1159)
 - [ASCollectionViewLayoutController] Set default tuning parameters before view is loaded. [Max Wang](https://github.com/wsdwsd0829). [#1158](https://github.com/TextureGroup/Texture/pull/1158)
 - [ASPhotosFrameworkImageRequestTests] Guard photo library with macro for tests. [Max Wang](https://github.com/wsdwsd0829). [#1147](https://github.com/TextureGroup/Texture/pull/1147)

Source/ASTextNode2.mm

@@ -332,22 +332,44 @@ - (NSArray *)exclusionPaths
 - (void)prepareAttributedString:(NSMutableAttributedString *)attributedString isForIntrinsicSize:(BOOL)isForIntrinsicSize
 {
   ASLockScopeSelf();
+  NSLineBreakMode innerMode;
+  switch (_truncationMode) {
+    case NSLineBreakByWordWrapping:
+    case NSLineBreakByCharWrapping:
+    case NSLineBreakByClipping:
+      innerMode = _truncationMode;
+      break;
+    default:
+      innerMode = NSLineBreakByWordWrapping;
+  }
 
   // Apply/Fix paragraph style if needed
   [attributedString enumerateAttribute:NSParagraphStyleAttributeName inRange:NSMakeRange(0, attributedString.length) options:kNilOptions usingBlock:^(NSParagraphStyle *style, NSRange range, BOOL * _Nonnull stop) {
 
-    const BOOL applyTruncationMode = (style != nil && style.lineBreakMode != _truncationMode);
+    BOOL applyTruncationMode = YES;
+    NSMutableParagraphStyle *paragraphStyle = nil;
     // Only "left" and "justified" alignments are supported while calculating intrinsic size.
     // Other alignments like "right", "center" and "natural" cause the size to be bigger than needed and thus should be ignored/overridden.
     const BOOL forceLeftAlignment = (style != nil
                                      && isForIntrinsicSize
                                      && style.alignment != NSTextAlignmentLeft
                                      && style.alignment != NSTextAlignmentJustified);
+    if (style != nil) {
+      if (innerMode == style.lineBreakMode) {
+        applyTruncationMode = NO;
+      }
+      paragraphStyle = [style mutableCopy];
+    } else {
+      if (innerMode == NSLineBreakByWordWrapping) {
+        applyTruncationMode = NO;
+      }
+      paragraphStyle = [NSMutableParagraphStyle new];
+    }
     if (!applyTruncationMode && !forceLeftAlignment) {
       return;
     }
+    paragraphStyle.lineBreakMode = innerMode;
 
-    NSMutableParagraphStyle *paragraphStyle = [style mutableCopy];
     if (applyTruncationMode) {
       paragraphStyle.lineBreakMode = _truncationMode;
     }
@@ -356,7 +378,7 @@ - (void)prepareAttributedString:(NSMutableAttributedString *)attributedString is
     }
     [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:range];
   }];
-  
+
   // Apply shadow if needed
   if (_shadowOpacity > 0 && (_shadowRadius != 0 || !CGSizeEqualToSize(_shadowOffset, CGSizeZero)) && CGColorGetAlpha(_shadowColor) > 0) {
     NSShadow *shadow = [[NSShadow alloc] init];