From cfb1707fc4306b418f42c111dff517d8bfe7f259 Mon Sep 17 00:00:00 2001
From: iska <iska.gp@gmail.com>
Date: Tue, 22 Nov 2016 01:25:04 +0100
Subject: [PATCH] Implement collapsed, common ancestor & root properties for
 HTML Range

---
 Sources/HTMLRange.m | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Sources/HTMLRange.m b/Sources/HTMLRange.m
index b7ab97c..908d708 100644
--- a/Sources/HTMLRange.m
+++ b/Sources/HTMLRange.m
@@ -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