“初始化俯视角工程，带puerts，未编过”

2024-12-01 02:11:25 +08:00
parent 04698dd585
commit 850d76173c
1491 changed files with 271579 additions and 0 deletions
@@ -0,0 +1,101 @@
+/*
+ * Tencent is pleased to support the open source community by making Puerts available.
+ * Copyright (C) 2020 THL A29 Limited, a Tencent company.  All rights reserved.
+ * Puerts is licensed under the BSD 3-Clause License, except for the third-party components listed in the file 'LICENSE' which may be subject to their corresponding license terms. 
+ * This file is subject to the terms and conditions defined in file 'LICENSE', which is part of this source code package.
+ */
+
+(function () {
+    "use strict";
+
+    let events = Object.create(null);
+    let eventsCount = 0;
+    
+    function checkListener(listener) {
+        if (typeof listener !== 'function') {
+            throw new Error('listener expect a function');
+        }
+    }
+    
+    function on(type, listener, prepend) {
+        checkListener(listener);
+        
+        let existing = events[type];
+        if (existing === undefined) {
+            events[type] = listener;
+            ++eventsCount;
+        } else {
+            if (typeof existing === 'function') {
+                events[type] = prepend ? [listener, existing] : [existing, listener];
+            } else if (prepend) {
+                existing.unshift(listener);
+            } else {
+                existing.push(listener);
+            }
+        }
+    }
+    
+    function off(type, listener) {
+        checkListener(listener);
+        
+        const list = events[type];
+        if (list === undefined)
+            return;
+        if (list === listener) {
+            if (--eventsCount === 0)
+                events = Object.create(null);
+            else {
+                events[type] = undefined;
+            }
+        } else if (typeof list !== 'function') {
+            for (var i = list.length - 1; i >= 0; i--) {
+                if (list[i] === listener) { //found
+                    if (i === 0)
+                      list.shift();
+                    else {
+                      spliceOne(list, i);
+                    }
+                    
+                    if (list.length === 1)
+                        events[type] = list[0];
+                    break;
+                }
+            }
+        }
+    }
+    
+    function emit(type, ...args) {
+        const listener = events[type];
+
+        if (listener === undefined)
+            return false;
+
+        if (typeof listener === 'function') {
+            Reflect.apply(listener, this, args);
+        } else {
+            const len = listener.length;
+            const listeners = arrayClone(listener, len);
+            for (var i = 0; i < len; ++i)
+                Reflect.apply(listeners[i], this, args);
+        }
+
+        return true;
+    }
+    
+    function arrayClone(arr, n) {
+        const copy = new Array(n);
+        for (var i = 0; i < n; ++i)
+            copy[i] = arr[i];
+        return copy;
+    }
+    
+    function spliceOne(list, index) {
+        for (; index + 1 < list.length; index++)
+            list[index] = list[index + 1];
+        list.pop();
+    }
+    
+    puerts.on = on;
+    puerts.off = off;
+    puerts.emit = emit;
+}());