[adapters] 增加小游戏适配部分源码

adapters/platforms/wechat/wrapper/systemInfo.js

@@ -0,0 +1,58 @@
+const adapter = window.__globalAdapter;
+const env = wx.getSystemInfoSync();
+let adaptSysFunc = adapter.adaptSys;
+
+Object.assign(adapter, {
+    // Extend adaptSys interface
+    adaptSys (sys) {
+        adaptSysFunc.call(this, sys);
+        // TODO: add mac platform
+        if (env.platform === 'windows') {
+            sys.isMobile = false;
+            sys.os = sys.OS_WINDOWS;
+        }
+        else if (adapter.isDevTool) {
+            let system = env.system.toLowerCase();
+            if (system.indexOf('android') > -1) {
+                sys.os = sys.OS_ANDROID;
+            }
+            else if (system.indexOf('ios') > -1) {
+                sys.os = sys.OS_IOS;
+            }
+        }
+        // wechatgame subdomain
+        if (!wx.getOpenDataContext) {
+            sys.platform = sys.WECHAT_GAME_SUB;
+        }
+        else {
+          sys.platform = sys.WECHAT_GAME;
+        }
+
+        // sys.glExtension = function (name) {
+        //     if (name === 'OES_texture_float') {
+        //         return false;
+        //     }
+        //     return !!cc.renderer.device.ext(name);
+        // };
+
+        // move to common if other platforms support
+        sys.getSafeAreaRect = function () {
+            let view = cc.view;
+            let safeArea = adapter.getSafeArea();
+            let screenSize = view.getFrameSize(); // Get leftBottom and rightTop point in UI coordinates
+            let leftBottom = new cc.Vec2(safeArea.left, safeArea.bottom);
+            let rightTop = new cc.Vec2(safeArea.right, safeArea.top); // Returns the real location in view.
+            let relatedPos = {
+                left: 0,
+                top: 0,
+                width: screenSize.width,
+                height: screenSize.height
+            };
+            view.convertToLocationInView(leftBottom.x, leftBottom.y, relatedPos, leftBottom);
+            view.convertToLocationInView(rightTop.x, rightTop.y, relatedPos, rightTop); // convert view point to design resolution size
+            view._convertPointWithScale(leftBottom);
+            view._convertPointWithScale(rightTop);
+            return cc.rect(leftBottom.x, leftBottom.y, rightTop.x - leftBottom.x, rightTop.y - leftBottom.y);
+        };
+    },
+});