Refactor code for collectAllStyles

lib/src/models/documents/document.dart

@@ -119,13 +119,17 @@ class Document {
     return delta;
   }
 
-  Style collectStyle(int index, int len, bool collectAll) {
+  /// Only attributes applied to all characters within this range are
+  /// included in the result.
+  Style collectStyle(int index, int len) {
     final res = queryChild(index);
-    if (collectAll) {
-      return (res.node as Line).collectAllStyle(res.offset, len);
-    } else {
-      return (res.node as Line).collectStyle(res.offset, len);
-    }
+    return (res.node as Line).collectStyle(res.offset, len);
+  }
+
+  /// Returns all style for any character within the specified text range.
+  Style collectAllStyles(int index, int len) {
+    final res = queryChild(index);
+    return (res.node as Line).collectAllStyles(res.offset, len);
   }
 
   ChildQuery queryChild(int offset) {

lib/src/models/documents/nodes/line.dart

@@ -370,7 +370,7 @@ class Line extends Container<Leaf?> {
   }
 
   /// Returns all style for any character within the specified text range.
-  Style collectAllStyle(int offset, int len) {
+  Style collectAllStyles(int offset, int len) {
     final local = math.min(length - offset, len);
     var result = Style();
 
@@ -394,11 +394,10 @@ class Line extends Container<Leaf?> {
 
     final remaining = len - local;
     if (remaining > 0) {
-      final rest = nextLine!.collectAllStyle(0, remaining);
+      final rest = nextLine!.collectAllStyles(0, remaining);
       result = result.mergeAll(rest);
     }
 
     return result;
   }
-
 }

lib/src/widgets/controller.dart

@@ -55,15 +55,18 @@ class QuillController extends ChangeNotifier {
         selection: selection,
       );
 
+  /// Only attributes applied to all characters within this range are
+  /// included in the result.
   Style getSelectionStyle() {
     return document
-        .collectStyle(selection.start, selection.end - selection.start, false)
+        .collectStyle(selection.start, selection.end - selection.start)
         .mergeAll(toggledStyle);
   }
 
-  Style getAllSelectionStyle() {
+  /// Returns all style for any character within the specified text range.
+  Style getAllSelectionStyles() {
     return document
-        .collectStyle(selection.start, selection.end - selection.start, true)
+        .collectAllStyles(selection.start, selection.end - selection.start)
         .mergeAll(toggledStyle);
   }
 

lib/src/widgets/toolbar/clear_format_button.dart

@@ -34,7 +34,7 @@ class _ClearFormatButtonState extends State<ClearFormatButton> {
         fillColor: fillColor,
         onPressed: () {
           for (final k
-              in widget.controller.getAllSelectionStyle().attributes.values) {
+              in widget.controller.getAllSelectionStyles().attributes.values) {
             widget.controller.formatSelection(Attribute.clone(k, null));
           }
         });