OLD | NEW |
| (Empty) |
1 import 'dart:async'; | |
2 | |
3 void assertHasParentNode(Node n) { assert(n.parentNode != null); } | |
4 void assertHasParentNodes(List<Node> list) { | |
5 for (var n in list) { | |
6 assertHasParentNode(n); | |
7 } | |
8 } | |
9 | |
10 class Node { | |
11 | |
12 ParentNode parentNode; | |
13 Node nextSibling; | |
14 Node previousSibling; | |
15 Node(); | |
16 | |
17 void insertBefore(List<Node> nodes) { | |
18 int count = nodes.length; | |
19 while (count-- > 0) { | |
20 parentNode._insertBefore(nodes[count], this); | |
21 } | |
22 | |
23 assertHasParentNodes(nodes); | |
24 } | |
25 | |
26 remove() { | |
27 if (parentNode == null) { | |
28 return; | |
29 } | |
30 | |
31 if (nextSibling != null) { | |
32 nextSibling.previousSibling = previousSibling; | |
33 } else { | |
34 parentNode.lastChild = previousSibling; | |
35 } | |
36 | |
37 if (previousSibling != null) { | |
38 previousSibling.nextSibling = nextSibling; | |
39 } else { | |
40 parentNode.firstChild = nextSibling; | |
41 } | |
42 | |
43 parentNode = null; | |
44 nextSibling = null; | |
45 previousSibling = null; | |
46 } | |
47 } | |
48 | |
49 class Text extends Node { | |
50 String data; | |
51 Text(this.data) : super(); | |
52 } | |
53 | |
54 class ParentNode extends Node { | |
55 Node firstChild; | |
56 Node lastChild; | |
57 | |
58 ParentNode() : super(); | |
59 | |
60 Node setChild(Node node) { | |
61 firstChild = node; | |
62 lastChild = node; | |
63 node.parentNode = this; | |
64 assertHasParentNode(node); | |
65 return node; | |
66 } | |
67 | |
68 Node _insertBefore(Node node, Node ref) { | |
69 assert(ref == null || ref.parentNode == this); | |
70 | |
71 if (node.parentNode != null) { | |
72 node.remove(); | |
73 } | |
74 | |
75 node.parentNode = this; | |
76 | |
77 if (firstChild == null && lastChild == null) { | |
78 firstChild = node; | |
79 lastChild = node; | |
80 } else if (ref == null) { | |
81 node.previousSibling = lastChild; | |
82 lastChild.nextSibling = node; | |
83 lastChild = node; | |
84 } else { | |
85 if (ref == firstChild) { | |
86 assert(ref.previousSibling == null); | |
87 firstChild = node; | |
88 } | |
89 node.previousSibling = ref.previousSibling; | |
90 ref.previousSibling = node; | |
91 node.nextSibling = ref; | |
92 } | |
93 | |
94 assertHasParentNode(node); | |
95 return node; | |
96 } | |
97 | |
98 Node appendChild(Node node) { | |
99 return _insertBefore(node, null); | |
100 } | |
101 } | |
102 | |
103 class Element extends ParentNode { | |
104 void addEventListener(String type, EventListener listener, [bool useCapture =
false]) {} | |
105 void removeEventListener(String type, EventListener listener) {} | |
106 void setAttribute(String name, [String value]) {} | |
107 } | |
108 | |
109 class Document extends ParentNode { | |
110 Document(); | |
111 Element createElement(String tagName) { | |
112 switch (tagName) { | |
113 case 'img' : return new HTMLImageElement(); | |
114 default : return new Element(); | |
115 } | |
116 } | |
117 } | |
118 | |
119 class HTMLImageElement extends Element { | |
120 HTMLImageElement(); | |
121 String src; | |
122 Object style = {}; | |
123 } | |
124 | |
125 class Event {} | |
126 | |
127 class PointerEvent extends Event {} | |
128 class GestureEvent extends Event {} | |
129 class WheelEvent extends Event {} | |
130 | |
131 typedef EventListener(Event event); | |
132 | |
133 void _callRAF(Function fn) { | |
134 fn(new DateTime.now().millisecondsSinceEpoch.toDouble()); | |
135 } | |
136 | |
137 class Window { | |
138 int requestAnimationFrame(Function fn) { | |
139 new Timer(const Duration(milliseconds: 16), () { | |
140 _callRAF(fn); | |
141 }); | |
142 return 1; | |
143 } | |
144 | |
145 void cancelAnimationFrame(int id) { | |
146 } | |
147 } | |
148 | |
149 Document document = new Document(); | |
150 | |
151 Window window = new Window(); | |
152 | |
153 class ClientRect { | |
154 double top; | |
155 double right; | |
156 double bottomr; | |
157 double left; | |
158 double width; | |
159 double height; | |
160 } | |
OLD | NEW |