Add HTML Range initializer that accepts start and end boundaries

Sources/HTMLRange.h

@@ -82,6 +82,20 @@ typedef NS_ENUM(unsigned short, HTMLRangeComparisonMethod)
  */
 - (instancetype)initWithDowcument:(HTMLDocument *)document;
 
+/**
+ Initializes a new range instance for the given document and boundaries.
+
+ @param document The HTML doucment for which the range will be constructed.
+ @param startContainer The node for the start boundary
+ @param startOffset The offset of the start boundary
+ @param endContainer The node for the end boundary
+ @param endOffset The offset of the end boundary
+ @return A new HTML Range instance.
+ */
+- (instancetype)initWithDowcument:(HTMLDocument *)document
+				   startContainer:(HTMLNode *)startContainer startOffset:(NSUInteger)startOffset
+					 endContainer:(HTMLNode *)endContainer endOffset:(NSUInteger)endOffset;
+
 /**
  Sets the start boundary.
 

Sources/HTMLRange.m

@@ -24,13 +24,20 @@
 #pragma mark - Lifecycle
 
 - (instancetype)initWithDowcument:(HTMLDocument *)document
+{
+	return [self initWithDowcument:document startContainer:document startOffset:0 endContainer:document endOffset:0];
+}
+
+- (instancetype)initWithDowcument:(HTMLDocument *)document
+				   startContainer:(HTMLNode *)startContainer startOffset:(NSUInteger)startOffset
+					 endContainer:(HTMLNode *)endContainer endOffset:(NSUInteger)endOffset
 {
 	self = [super init];
 	if (self) {
 		_ownerDocument = document;
 		[_ownerDocument attachRange:self];
-		[self setStartNode:document startOffset:0];
-		[self setEndNode:document endOffset:0];
+		[self setStartNode:startContainer startOffset:startOffset];
+		[self setEndNode:endContainer endOffset:endOffset];
 	}
 	return self;
 }