08-27-周三_17-09-29

node_modules/domutils/lib/manipulation.js

@@ -0,0 +1,77 @@
+exports.removeElement = function(elem){
+	if(elem.prev) elem.prev.next = elem.next;
+	if(elem.next) elem.next.prev = elem.prev;
+
+	if(elem.parent){
+		var childs = elem.parent.children;
+		childs.splice(childs.lastIndexOf(elem), 1);
+	}
+};
+
+exports.replaceElement = function(elem, replacement){
+	var prev = replacement.prev = elem.prev;
+	if(prev){
+		prev.next = replacement;
+	}
+
+	var next = replacement.next = elem.next;
+	if(next){
+		next.prev = replacement;
+	}
+
+	var parent = replacement.parent = elem.parent;
+	if(parent){
+		var childs = parent.children;
+		childs[childs.lastIndexOf(elem)] = replacement;
+	}
+};
+
+exports.appendChild = function(elem, child){
+	child.parent = elem;
+
+	if(elem.children.push(child) !== 1){
+		var sibling = elem.children[elem.children.length - 2];
+		sibling.next = child;
+		child.prev = sibling;
+		child.next = null;
+	}
+};
+
+exports.append = function(elem, next){
+	var parent = elem.parent,
+		currNext = elem.next;
+
+	next.next = currNext;
+	next.prev = elem;
+	elem.next = next;
+	next.parent = parent;
+
+	if(currNext){
+		currNext.prev = next;
+		if(parent){
+			var childs = parent.children;
+			childs.splice(childs.lastIndexOf(currNext), 0, next);
+		}
+	} else if(parent){
+		parent.children.push(next);
+	}
+};
+
+exports.prepend = function(elem, prev){
+	var parent = elem.parent;
+	if(parent){
+		var childs = parent.children;
+		childs.splice(childs.lastIndexOf(elem), 0, prev);
+	}
+
+	if(elem.prev){
+		elem.prev.next = prev;
+	}
+	
+	prev.parent = parent;
+	prev.prev = elem.prev;
+	prev.next = elem;
+	elem.prev = prev;
+};
+
+