[adapters] 增加小游戏适配部分源码

adapters/platforms/taobao/wrapper/builtin/WindowProperties.js

@@ -0,0 +1,31 @@
+const { pixelRatio, windowWidth, windowHeight } = my.getSystemInfoSync()
+const devicePixelRatio = pixelRatio;
+
+let width, height;
+if ($global.screencanvas.getBoundingClientRect) {
+  let rect = $global.screencanvas.getBoundingClientRect();
+  width = rect.width;
+  height = rect.height;
+} else {
+  width = windowWidth;
+  height = windowHeight;
+}
+export const innerWidth = width;
+export const innerHeight = height;
+export { devicePixelRatio }
+export const screen = {
+  width,
+  height,
+  availWidth: innerWidth,
+  availHeight: innerHeight,
+  availLeft: 0,
+  availTop: 0,
+}
+
+export const performance = {
+  now: Date.now
+};
+
+export const ontouchstart = null;
+export const ontouchmove = null;
+export const ontouchend = null;