Implement collapsed, common ancestor & root properties for HTML Range

2016-11-22 01:25:04 +01:00
parent 733780091d
commit cfb1707fc4
1 changed files with 20 additions and 0 deletions
@@ -24,6 +24,26 @@
 	return self;
 }

+#pragma mark - Properties
+
+- (BOOL)isCollapsed
+{
+	return _startContainer == _endContainer && _startOffset == _endOffset;
+}
+
+- (HTMLNode *)commonAncestorContainer
+{
+	HTMLNode *container = _startContainer;
+	while (![container containsNode:_endContainer]) {
+		container = container.parentNode;
+	}
+	return container;
+}
+
+- (HTMLNode *)rootNode
+{
+	return _startContainer.rootNode;
+}

 #pragma mark - Boundaries