From 2b9a4c8903033320480122113a59cf7dafebcc72 Mon Sep 17 00:00:00 2001 From: Monkeylord Date: Wed, 24 Jul 2019 21:33:35 +0800 Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B0=E4=BA=86=E6=89=B9=E9=87=8F?= =?UTF-8?q?=E8=B7=9F=E8=B8=AA=E5=8A=9F=E8=83=BD=EF=BC=8C=E6=94=AF=E6=8C=81?= =?UTF-8?q?=E6=AD=A3=E5=88=99=E8=A1=A8=E8=BE=BE=E5=BC=8F=E5=92=8C=E5=AE=9E?= =?UTF-8?q?=E6=97=B6=E8=B0=83=E6=95=B4=E8=A2=ABHook=E6=96=B9=E6=B3=95?= =?UTF-8?q?=E3=80=82=20=E6=9B=B4=E5=8A=A0=E6=99=BA=E8=83=BD=E5=92=8C?= =?UTF-8?q?=E6=96=B9=E4=BE=BF=E4=BA=86=E3=80=82?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- README.md | 24 +- app/src/main/assets/js/jquery.js | 2 + app/src/main/assets/js/vue.js | 11944 ++++++++++++++++ app/src/main/assets/pages/tracer2.html | 485 + .../java/monkeylord/XServer/api/Tracer.java | 2 +- .../monkeylord/XServer/api/wsTracerNew.java | 164 +- .../XServer/handler/MemoryHandler.java | 8 +- .../XServer/handler/ObjectHandler.java | 10 +- .../XServer/objectparser/GenericParser.java | 4 +- 9 files changed, 12575 insertions(+), 68 deletions(-) create mode 100644 app/src/main/assets/js/jquery.js create mode 100644 app/src/main/assets/js/vue.js create mode 100644 app/src/main/assets/pages/tracer2.html diff --git a/README.md b/README.md index 474924e..e7a50bc 100644 --- a/README.md +++ b/README.md @@ -27,19 +27,19 @@ Xposed启动WebServer并提供方法注入能力，WebServer负责界面、RPC #### 组件结构 -**Xposed入口：**XposedEntry +Xposed入口：XposedEntry -**应用选择器：**MainActivity +应用选择器：MainActivity -**WebServer：**XServer +WebServer：XServer -**业务逻辑处理：**handler +业务逻辑处理：handler -**对外接口：**api +对外接口：api -**其它功能组件：**utils、objectparser +其它功能组件：utils、objectparser -**资源文件：**各类freemarker页面（XServer用freemarker作为模板引擎） +资源文件：各类freemarker页面（XServer用freemarker作为模板引擎） #### WebServer @@ -47,7 +47,7 @@ Xposed启动WebServer并提供方法注入能力，WebServer负责界面、RPC 定义了两类API接口，HTTP API和WebSocket API（Operation、wsOperation），启动后加载的各类功能API都要在此注册。 -模板引擎则很简洁，在assets目录中编写模板，然后*XServer.render(data,templete)*即可。 +模板引擎则很简洁，在assets目录中编写模板，然后`XServer.render(data,templete)`即可。 ### API组件 @@ -97,9 +97,13 @@ TODO：处理拦截 #### 深度操作 -TODO：提供SO和APK加载 +目前包含MemoryHandler + +提供内存操作，利用内部类Libcore实现，没有使用SO。 -TODO：提供内存操作，利用SO实现 +可以用于Dump内存寻找Demo，也可以动态修改内存。 + +TODO：提供SO和APK加载 TODO：提供C层Hook，利用SO实现，或许可以使用substrate，或许可以现场gcc？ diff --git a/app/src/main/assets/js/jquery.js b/app/src/main/assets/js/jquery.js new file mode 100644 index 0000000..07c00cd --- /dev/null +++ b/app/src/main/assets/js/jquery.js @@ -0,0 +1,2 @@ +/*! jQuery v3.4.1 | (c) JS Foundation and other contributors | jquery.org/license */ +!function(e,t){"use strict";"object"==typeof module&&"object"==typeof module.exports?module.exports=e.document?t(e,!0):function(e){if(!e.document)throw new Error("jQuery requires a window with a document");return t(e)}:t(e)}("undefined"!=typeof window?window:this,function(C,e){"use strict";var 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This is platform-dependent and may be overwritten. + */ + isReservedTag: no, + + /** + * Check if an attribute is reserved so that it cannot be used as a component + * prop. This is platform-dependent and may be overwritten. + */ + isReservedAttr: no, + + /** + * Check if a tag is an unknown element. + * Platform-dependent. + */ + isUnknownElement: no, + + /** + * Get the namespace of an element + */ + getTagNamespace: noop, + + /** + * Parse the real tag name for the specific platform. + */ + parsePlatformTagName: identity, + + /** + * Check if an attribute must be bound using property, e.g. value + * Platform-dependent. + */ + mustUseProp: no, + + /** + * Perform updates asynchronously. Intended to be used by Vue Test Utils + * This will significantly reduce performance if set to false. + */ + async: true, + + /** + * Exposed for legacy reasons + */ + _lifecycleHooks: LIFECYCLE_HOOKS + }); + + /* */ + + /** + * unicode letters used for parsing html tags, component names and property paths. + * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname + * skipping \u10000-\uEFFFF due to it freezing up PhantomJS + */ + var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/; + + /** + * Check if a string starts with $ or _ + */ + function isReserved (str) { + var c = (str + '').charCodeAt(0); + return c === 0x24 || c === 0x5F + } + + /** + * Define a property. + */ + function def (obj, key, val, enumerable) { + Object.defineProperty(obj, key, { + value: val, + enumerable: !!enumerable, + writable: true, + configurable: true + }); + } + + /** + * Parse simple path. + */ + var bailRE = new RegExp(("[^" + (unicodeRegExp.source) + ".$_\\d]")); + function parsePath (path) { + if (bailRE.test(path)) { + return + } + var segments = path.split('.'); + return function (obj) { + for (var i = 0; i < segments.length; i++) { + if (!obj) { return } + obj = obj[segments[i]]; + } + return obj + } + } + + /* */ + + // can we use __proto__? + var hasProto = '__proto__' in {}; + + // Browser environment sniffing + var inBrowser = typeof window !== 'undefined'; + var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform; + var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase(); + var UA = inBrowser && window.navigator.userAgent.toLowerCase(); + var isIE = UA && /msie|trident/.test(UA); + var isIE9 = UA && UA.indexOf('msie 9.0') > 0; + var isEdge = UA && UA.indexOf('edge/') > 0; + var isAndroid = (UA && UA.indexOf('android') > 0) || (weexPlatform === 'android'); + var isIOS = (UA && /iphone|ipad|ipod|ios/.test(UA)) || (weexPlatform === 'ios'); + var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge; + var isPhantomJS = UA && /phantomjs/.test(UA); + var isFF = UA && UA.match(/firefox\/(\d+)/); + + // Firefox has a "watch" function on Object.prototype... + var nativeWatch = ({}).watch; + + var supportsPassive = false; + if (inBrowser) { + try { + var opts = {}; + Object.defineProperty(opts, 'passive', ({ + get: function get () { + /* istanbul ignore next */ + supportsPassive = true; + } + })); // https://github.com/facebook/flow/issues/285 + window.addEventListener('test-passive', null, opts); + } catch (e) {} + } + + // this needs to be lazy-evaled because vue may be required before + // vue-server-renderer can set VUE_ENV + var _isServer; + var isServerRendering = function () { + if (_isServer === undefined) { + /* istanbul ignore if */ + if (!inBrowser && !inWeex && typeof global !== 'undefined') { + // detect presence of vue-server-renderer and avoid + // Webpack shimming the process + _isServer = global['process'] && global['process'].env.VUE_ENV === 'server'; + } else { + _isServer = false; + } + } + return _isServer + }; + + // detect devtools + var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__; + + /* istanbul ignore next */ + function isNative (Ctor) { + return typeof Ctor === 'function' && /native code/.test(Ctor.toString()) + } + + var hasSymbol = + typeof Symbol !== 'undefined' && isNative(Symbol) && + typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys); + + var _Set; + /* istanbul ignore if */ // $flow-disable-line + if (typeof Set !== 'undefined' && isNative(Set)) { + // use native Set when available. + _Set = Set; + } else { + // a non-standard Set polyfill that only works with primitive keys. + _Set = /*@__PURE__*/(function () { + function Set () { + this.set = Object.create(null); + } + Set.prototype.has = function has (key) { + return this.set[key] === true + }; + Set.prototype.add = function add (key) { + this.set[key] = true; + }; + Set.prototype.clear = function clear () { + this.set = Object.create(null); + }; + + return Set; + }()); + } + + /* */ + + var warn = noop; + var tip = noop; + var generateComponentTrace = (noop); // work around flow check + var formatComponentName = (noop); + + { + var hasConsole = typeof console !== 'undefined'; + var classifyRE = /(?:^|[-_])(\w)/g; + var classify = function (str) { return str + .replace(classifyRE, function (c) { return c.toUpperCase(); }) + .replace(/[-_]/g, ''); }; + + warn = function (msg, vm) { + var trace = vm ? generateComponentTrace(vm) : ''; + + if (config.warnHandler) { + config.warnHandler.call(null, msg, vm, trace); + } else if (hasConsole && (!config.silent)) { + console.error(("[Vue warn]: " + msg + trace)); + } + }; + + tip = function (msg, vm) { + if (hasConsole && (!config.silent)) { + console.warn("[Vue tip]: " + msg + ( + vm ? generateComponentTrace(vm) : '' + )); + } + }; + + formatComponentName = function (vm, includeFile) { + if (vm.$root === vm) { + return '' + } + var options = typeof vm === 'function' && vm.cid != null + ? vm.options + : vm._isVue + ? vm.$options || vm.constructor.options + : vm; + var name = options.name || options._componentTag; + var file = options.__file; + if (!name && file) { + var match = file.match(/([^/\\]+)\.vue$/); + name = match && match[1]; + } + + return ( + (name ? ("<" + (classify(name)) + ">") : "") + + (file && includeFile !== false ? (" at " + file) : '') + ) + }; + + var repeat = function (str, n) { + var res = ''; + while (n) { + if (n % 2 === 1) { res += str; } + if (n > 1) { str += str; } + n >>= 1; + } + return res + }; + + generateComponentTrace = function (vm) { + if (vm._isVue && vm.$parent) { + var tree = []; + var currentRecursiveSequence = 0; + while (vm) { + if (tree.length > 0) { + var last = tree[tree.length - 1]; + if (last.constructor === vm.constructor) { + currentRecursiveSequence++; + vm = vm.$parent; + continue + } else if (currentRecursiveSequence > 0) { + tree[tree.length - 1] = [last, currentRecursiveSequence]; + currentRecursiveSequence = 0; + } + } + tree.push(vm); + vm = vm.$parent; + } + return '\n\nfound in\n\n' + tree + .map(function (vm, i) { return ("" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm) + ? ((formatComponentName(vm[0])) + "... (" + (vm[1]) + " recursive calls)") + : formatComponentName(vm))); }) + .join('\n') + } else { + return ("\n\n(found in " + (formatComponentName(vm)) + ")") + } + }; + } + + /* */ + + var uid = 0; + + /** + * A dep is an observable that can have multiple + * directives subscribing to it. + */ + var Dep = function Dep () { + this.id = uid++; + this.subs = []; + }; + + Dep.prototype.addSub = function addSub (sub) { + this.subs.push(sub); + }; + + Dep.prototype.removeSub = function removeSub (sub) { + remove(this.subs, sub); + }; + + Dep.prototype.depend = function depend () { + if (Dep.target) { + Dep.target.addDep(this); + } + }; + + Dep.prototype.notify = function notify () { + // stabilize the subscriber list first + var subs = this.subs.slice(); + if (!config.async) { + // subs aren't sorted in scheduler if not running async + // we need to sort them now to make sure they fire in correct + // order + subs.sort(function (a, b) { return a.id - b.id; }); + } + for (var i = 0, l = subs.length; i < l; i++) { + subs[i].update(); + } + }; + + // The current target watcher being evaluated. + // This is globally unique because only one watcher + // can be evaluated at a time. + Dep.target = null; + var targetStack = []; + + function pushTarget (target) { + targetStack.push(target); + Dep.target = target; + } + + function popTarget () { + targetStack.pop(); + Dep.target = targetStack[targetStack.length - 1]; + } + + /* */ + + var VNode = function VNode ( + tag, + data, + children, + text, + elm, + context, + componentOptions, + asyncFactory + ) { + this.tag = tag; + this.data = data; + this.children = children; + this.text = text; + this.elm = elm; + this.ns = undefined; + this.context = context; + this.fnContext = undefined; + this.fnOptions = undefined; + this.fnScopeId = undefined; + this.key = data && data.key; + this.componentOptions = componentOptions; + this.componentInstance = undefined; + this.parent = undefined; + this.raw = false; + this.isStatic = false; + this.isRootInsert = true; + this.isComment = false; + this.isCloned = false; + this.isOnce = false; + this.asyncFactory = asyncFactory; + this.asyncMeta = undefined; + this.isAsyncPlaceholder = false; + }; + + var prototypeAccessors = { child: { configurable: true } }; + + // DEPRECATED: alias for componentInstance for backwards compat. + /* istanbul ignore next */ + prototypeAccessors.child.get = function () { + return this.componentInstance + }; + + Object.defineProperties( VNode.prototype, prototypeAccessors ); + + var createEmptyVNode = function (text) { + if ( text === void 0 ) text = ''; + + var node = new VNode(); + node.text = text; + node.isComment = true; + return node + }; + + function createTextVNode (val) { + return new VNode(undefined, undefined, undefined, String(val)) + } + + // optimized shallow clone + // used for static nodes and slot nodes because they may be reused across + // multiple renders, cloning them avoids errors when DOM manipulations rely + // on their elm reference. + function cloneVNode (vnode) { + var cloned = new VNode( + vnode.tag, + vnode.data, + // #7975 + // clone children array to avoid mutating original in case of cloning + // a child. + vnode.children && vnode.children.slice(), + vnode.text, + vnode.elm, + vnode.context, + vnode.componentOptions, + vnode.asyncFactory + ); + cloned.ns = vnode.ns; + cloned.isStatic = vnode.isStatic; + cloned.key = vnode.key; + cloned.isComment = vnode.isComment; + cloned.fnContext = vnode.fnContext; + cloned.fnOptions = vnode.fnOptions; + cloned.fnScopeId = vnode.fnScopeId; + cloned.asyncMeta = vnode.asyncMeta; + cloned.isCloned = true; + return cloned + } + + /* + * not type checking this file because flow doesn't play well with + * dynamically accessing methods on Array prototype + */ + + var arrayProto = Array.prototype; + var arrayMethods = Object.create(arrayProto); + + var methodsToPatch = [ + 'push', + 'pop', + 'shift', + 'unshift', + 'splice', + 'sort', + 'reverse' + ]; + + /** + * Intercept mutating methods and emit events + */ + methodsToPatch.forEach(function (method) { + // cache original method + var original = arrayProto[method]; + def(arrayMethods, method, function mutator () { + var args = [], len = arguments.length; + while ( len-- ) args[ len ] = arguments[ len ]; + + var result = original.apply(this, args); + var ob = this.__ob__; + var inserted; + switch (method) { + case 'push': + case 'unshift': + inserted = args; + break + case 'splice': + inserted = args.slice(2); + break + } + if (inserted) { ob.observeArray(inserted); } + // notify change + ob.dep.notify(); + return result + }); + }); + + /* */ + + var arrayKeys = Object.getOwnPropertyNames(arrayMethods); + + /** + * In some cases we may want to disable observation inside a component's + * update computation. + */ + var shouldObserve = true; + + function toggleObserving (value) { + shouldObserve = value; + } + + /** + * Observer class that is attached to each observed + * object. Once attached, the observer converts the target + * object's property keys into getter/setters that + * collect dependencies and dispatch updates. + */ + var Observer = function Observer (value) { + this.value = value; + this.dep = new Dep(); + this.vmCount = 0; + def(value, '__ob__', this); + if (Array.isArray(value)) { + if (hasProto) { + protoAugment(value, arrayMethods); + } else { + copyAugment(value, arrayMethods, arrayKeys); + } + this.observeArray(value); + } else { + this.walk(value); + } + }; + + /** + * Walk through all properties and convert them into + * getter/setters. This method should only be called when + * value type is Object. + */ + Observer.prototype.walk = function walk (obj) { + var keys = Object.keys(obj); + for (var i = 0; i < keys.length; i++) { + defineReactive$$1(obj, keys[i]); + } + }; + + /** + * Observe a list of Array items. + */ + Observer.prototype.observeArray = function observeArray (items) { + for (var i = 0, l = items.length; i < l; i++) { + observe(items[i]); + } + }; + + // helpers + + /** + * Augment a target Object or Array by intercepting + * the prototype chain using __proto__ + */ + function protoAugment (target, src) { + /* eslint-disable no-proto */ + target.__proto__ = src; + /* eslint-enable no-proto */ + } + + /** + * Augment a target Object or Array by defining + * hidden properties. + */ + /* istanbul ignore next */ + function copyAugment (target, src, keys) { + for (var i = 0, l = keys.length; i < l; i++) { + var key = keys[i]; + def(target, key, src[key]); + } + } + + /** + * Attempt to create an observer instance for a value, + * returns the new observer if successfully observed, + * or the existing observer if the value already has one. + */ + function observe (value, asRootData) { + if (!isObject(value) || value instanceof VNode) { + return + } + var ob; + if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) { + ob = value.__ob__; + } else if ( + shouldObserve && + !isServerRendering() && + (Array.isArray(value) || isPlainObject(value)) && + Object.isExtensible(value) && + !value._isVue + ) { + ob = new Observer(value); + } + if (asRootData && ob) { + ob.vmCount++; + } + return ob + } + + /** + * Define a reactive property on an Object. + */ + function defineReactive$$1 ( + obj, + key, + val, + customSetter, + shallow + ) { + var dep = new Dep(); + + var property = Object.getOwnPropertyDescriptor(obj, key); + if (property && property.configurable === false) { + return + } + + // cater for pre-defined getter/setters + var getter = property && property.get; + var setter = property && property.set; + if ((!getter || setter) && arguments.length === 2) { + val = obj[key]; + } + + var childOb = !shallow && observe(val); + Object.defineProperty(obj, key, { + enumerable: true, + configurable: true, + get: function reactiveGetter () { + var value = getter ? getter.call(obj) : val; + if (Dep.target) { + dep.depend(); + if (childOb) { + childOb.dep.depend(); + if (Array.isArray(value)) { + dependArray(value); + } + } + } + return value + }, + set: function reactiveSetter (newVal) { + var value = getter ? getter.call(obj) : val; + /* eslint-disable no-self-compare */ + if (newVal === value || (newVal !== newVal && value !== value)) { + return + } + /* eslint-enable no-self-compare */ + if (customSetter) { + customSetter(); + } + // #7981: for accessor properties without setter + if (getter && !setter) { return } + if (setter) { + setter.call(obj, newVal); + } else { + val = newVal; + } + childOb = !shallow && observe(newVal); + dep.notify(); + } + }); + } + + /** + * Set a property on an object. Adds the new property and + * triggers change notification if the property doesn't + * already exist. + */ + function set (target, key, val) { + if (isUndef(target) || isPrimitive(target) + ) { + warn(("Cannot set reactive property on undefined, null, or primitive value: " + ((target)))); + } + if (Array.isArray(target) && isValidArrayIndex(key)) { + target.length = Math.max(target.length, key); + target.splice(key, 1, val); + return val + } + if (key in target && !(key in Object.prototype)) { + target[key] = val; + return val + } + var ob = (target).__ob__; + if (target._isVue || (ob && ob.vmCount)) { + warn( + 'Avoid adding reactive properties to a Vue instance or its root $data ' + + 'at runtime - declare it upfront in the data option.' + ); + return val + } + if (!ob) { + target[key] = val; + return val + } + defineReactive$$1(ob.value, key, val); + ob.dep.notify(); + return val + } + + /** + * Delete a property and trigger change if necessary. + */ + function del (target, key) { + if (isUndef(target) || isPrimitive(target) + ) { + warn(("Cannot delete reactive property on undefined, null, or primitive value: " + ((target)))); + } + if (Array.isArray(target) && isValidArrayIndex(key)) { + target.splice(key, 1); + return + } + var ob = (target).__ob__; + if (target._isVue || (ob && ob.vmCount)) { + warn( + 'Avoid deleting properties on a Vue instance or its root $data ' + + '- just set it to null.' + ); + return + } + if (!hasOwn(target, key)) { + return + } + delete target[key]; + if (!ob) { + return + } + ob.dep.notify(); + } + + /** + * Collect dependencies on array elements when the array is touched, since + * we cannot intercept array element access like property getters. + */ + function dependArray (value) { + for (var e = (void 0), i = 0, l = value.length; i < l; i++) { + e = value[i]; + e && e.__ob__ && e.__ob__.dep.depend(); + if (Array.isArray(e)) { + dependArray(e); + } + } + } + + /* */ + + /** + * Option overwriting strategies are functions that handle + * how to merge a parent option value and a child option + * value into the final value. + */ + var strats = config.optionMergeStrategies; + + /** + * Options with restrictions + */ + { + strats.el = strats.propsData = function (parent, child, vm, key) { + if (!vm) { + warn( + "option \"" + key + "\" can only be used during instance " + + 'creation with the `new` keyword.' + ); + } + return defaultStrat(parent, child) + }; + } + + /** + * Helper that recursively merges two data objects together. + */ + function mergeData (to, from) { + if (!from) { return to } + var key, toVal, fromVal; + + var keys = hasSymbol + ? Reflect.ownKeys(from) + : Object.keys(from); + + for (var i = 0; i < keys.length; i++) { + key = keys[i]; + // in case the object is already observed... + if (key === '__ob__') { continue } + toVal = to[key]; + fromVal = from[key]; + if (!hasOwn(to, key)) { + set(to, key, fromVal); + } else if ( + toVal !== fromVal && + isPlainObject(toVal) && + isPlainObject(fromVal) + ) { + mergeData(toVal, fromVal); + } + } + return to + } + + /** + * Data + */ + function mergeDataOrFn ( + parentVal, + childVal, + vm + ) { + if (!vm) { + // in a Vue.extend merge, both should be functions + if (!childVal) { + return parentVal + } + if (!parentVal) { + return childVal + } + // when parentVal & childVal are both present, + // we need to return a function that returns the + // merged result of both functions... no need to + // check if parentVal is a function here because + // it has to be a function to pass previous merges. + return function mergedDataFn () { + return mergeData( + typeof childVal === 'function' ? childVal.call(this, this) : childVal, + typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal + ) + } + } else { + return function mergedInstanceDataFn () { + // instance merge + var instanceData = typeof childVal === 'function' + ? childVal.call(vm, vm) + : childVal; + var defaultData = typeof parentVal === 'function' + ? parentVal.call(vm, vm) + : parentVal; + if (instanceData) { + return mergeData(instanceData, defaultData) + } else { + return defaultData + } + } + } + } + + strats.data = function ( + parentVal, + childVal, + vm + ) { + if (!vm) { + if (childVal && typeof childVal !== 'function') { + warn( + 'The "data" option should be a function ' + + 'that returns a per-instance value in component ' + + 'definitions.', + vm + ); + + return parentVal + } + return mergeDataOrFn(parentVal, childVal) + } + + return mergeDataOrFn(parentVal, childVal, vm) + }; + + /** + * Hooks and props are merged as arrays. + */ + function mergeHook ( + parentVal, + childVal + ) { + var res = childVal + ? parentVal + ? parentVal.concat(childVal) + : Array.isArray(childVal) + ? childVal + : [childVal] + : parentVal; + return res + ? dedupeHooks(res) + : res + } + + function dedupeHooks (hooks) { + var res = []; + for (var i = 0; i < hooks.length; i++) { + if (res.indexOf(hooks[i]) === -1) { + res.push(hooks[i]); + } + } + return res + } + + LIFECYCLE_HOOKS.forEach(function (hook) { + strats[hook] = mergeHook; + }); + + /** + * Assets + * + * When a vm is present (instance creation), we need to do + * a three-way merge between constructor options, instance + * options and parent options. + */ + function mergeAssets ( + parentVal, + childVal, + vm, + key + ) { + var res = Object.create(parentVal || null); + if (childVal) { + assertObjectType(key, childVal, vm); + return extend(res, childVal) + } else { + return res + } + } + + ASSET_TYPES.forEach(function (type) { + strats[type + 's'] = mergeAssets; + }); + + /** + * Watchers. + * + * Watchers hashes should not overwrite one + * another, so we merge them as arrays. + */ + strats.watch = function ( + parentVal, + childVal, + vm, + key + ) { + // work around Firefox's Object.prototype.watch... + if (parentVal === nativeWatch) { parentVal = undefined; } + if (childVal === nativeWatch) { childVal = undefined; } + /* istanbul ignore if */ + if (!childVal) { return Object.create(parentVal || null) } + { + assertObjectType(key, childVal, vm); + } + if (!parentVal) { return childVal } + var ret = {}; + extend(ret, parentVal); + for (var key$1 in childVal) { + var parent = ret[key$1]; + var child = childVal[key$1]; + if (parent && !Array.isArray(parent)) { + parent = [parent]; + } + ret[key$1] = parent + ? parent.concat(child) + : Array.isArray(child) ? child : [child]; + } + return ret + }; + + /** + * Other object hashes. + */ + strats.props = + strats.methods = + strats.inject = + strats.computed = function ( + parentVal, + childVal, + vm, + key + ) { + if (childVal && "development" !== 'production') { + assertObjectType(key, childVal, vm); + } + if (!parentVal) { return childVal } + var ret = Object.create(null); + extend(ret, parentVal); + if (childVal) { extend(ret, childVal); } + return ret + }; + strats.provide = mergeDataOrFn; + + /** + * Default strategy. + */ + var defaultStrat = function (parentVal, childVal) { + return childVal === undefined + ? parentVal + : childVal + }; + + /** + * Validate component names + */ + function checkComponents (options) { + for (var key in options.components) { + validateComponentName(key); + } + } + + function validateComponentName (name) { + if (!new RegExp(("^[a-zA-Z][\\-\\.0-9_" + (unicodeRegExp.source) + "]*$")).test(name)) { + warn( + 'Invalid component name: "' + name + '". Component names ' + + 'should conform to valid custom element name in html5 specification.' + ); + } + if (isBuiltInTag(name) || config.isReservedTag(name)) { + warn( + 'Do not use built-in or reserved HTML elements as component ' + + 'id: ' + name + ); + } + } + + /** + * Ensure all props option syntax are normalized into the + * Object-based format. + */ + function normalizeProps (options, vm) { + var props = options.props; + if (!props) { return } + var res = {}; + var i, val, name; + if (Array.isArray(props)) { + i = props.length; + while (i--) { + val = props[i]; + if (typeof val === 'string') { + name = camelize(val); + res[name] = { type: null }; + } else { + warn('props must be strings when using array syntax.'); + } + } + } else if (isPlainObject(props)) { + for (var key in props) { + val = props[key]; + name = camelize(key); + res[name] = isPlainObject(val) + ? val + : { type: val }; + } + } else { + warn( + "Invalid value for option \"props\": expected an Array or an Object, " + + "but got " + (toRawType(props)) + ".", + vm + ); + } + options.props = res; + } + + /** + * Normalize all injections into Object-based format + */ + function normalizeInject (options, vm) { + var inject = options.inject; + if (!inject) { return } + var normalized = options.inject = {}; + if (Array.isArray(inject)) { + for (var i = 0; i < inject.length; i++) { + normalized[inject[i]] = { from: inject[i] }; + } + } else if (isPlainObject(inject)) { + for (var key in inject) { + var val = inject[key]; + normalized[key] = isPlainObject(val) + ? extend({ from: key }, val) + : { from: val }; + } + } else { + warn( + "Invalid value for option \"inject\": expected an Array or an Object, " + + "but got " + (toRawType(inject)) + ".", + vm + ); + } + } + + /** + * Normalize raw function directives into object format. + */ + function normalizeDirectives (options) { + var dirs = options.directives; + if (dirs) { + for (var key in dirs) { + var def$$1 = dirs[key]; + if (typeof def$$1 === 'function') { + dirs[key] = { bind: def$$1, update: def$$1 }; + } + } + } + } + + function assertObjectType (name, value, vm) { + if (!isPlainObject(value)) { + warn( + "Invalid value for option \"" + name + "\": expected an Object, " + + "but got " + (toRawType(value)) + ".", + vm + ); + } + } + + /** + * Merge two option objects into a new one. + * Core utility used in both instantiation and inheritance. + */ + function mergeOptions ( + parent, + child, + vm + ) { + { + checkComponents(child); + } + + if (typeof child === 'function') { + child = child.options; + } + + normalizeProps(child, vm); + normalizeInject(child, vm); + normalizeDirectives(child); + + // Apply extends and mixins on the child options, + // but only if it is a raw options object that isn't + // the result of another mergeOptions call. + // Only merged options has the _base property. + if (!child._base) { + if (child.extends) { + parent = mergeOptions(parent, child.extends, vm); + } + if (child.mixins) { + for (var i = 0, l = child.mixins.length; i < l; i++) { + parent = mergeOptions(parent, child.mixins[i], vm); + } + } + } + + var options = {}; + var key; + for (key in parent) { + mergeField(key); + } + for (key in child) { + if (!hasOwn(parent, key)) { + mergeField(key); + } + } + function mergeField (key) { + var strat = strats[key] || defaultStrat; + options[key] = strat(parent[key], child[key], vm, key); + } + return options + } + + /** + * Resolve an asset. + * This function is used because child instances need access + * to assets defined in its ancestor chain. + */ + function resolveAsset ( + options, + type, + id, + warnMissing + ) { + /* istanbul ignore if */ + if (typeof id !== 'string') { + return + } + var assets = options[type]; + // check local registration variations first + if (hasOwn(assets, id)) { return assets[id] } + var camelizedId = camelize(id); + if (hasOwn(assets, camelizedId)) { return assets[camelizedId] } + var PascalCaseId = capitalize(camelizedId); + if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] } + // fallback to prototype chain + var res = assets[id] || assets[camelizedId] || assets[PascalCaseId]; + if (warnMissing && !res) { + warn( + 'Failed to resolve ' + type.slice(0, -1) + ': ' + id, + options + ); + } + return res + } + + /* */ + + + + function validateProp ( + key, + propOptions, + propsData, + vm + ) { + var prop = propOptions[key]; + var absent = !hasOwn(propsData, key); + var value = propsData[key]; + // boolean casting + var booleanIndex = getTypeIndex(Boolean, prop.type); + if (booleanIndex > -1) { + if (absent && !hasOwn(prop, 'default')) { + value = false; + } else if (value === '' || value === hyphenate(key)) { + // only cast empty string / same name to boolean if + // boolean has higher priority + var stringIndex = getTypeIndex(String, prop.type); + if (stringIndex < 0 || booleanIndex < stringIndex) { + value = true; + } + } + } + // check default value + if (value === undefined) { + value = getPropDefaultValue(vm, prop, key); + // since the default value is a fresh copy, + // make sure to observe it. + var prevShouldObserve = shouldObserve; + toggleObserving(true); + observe(value); + toggleObserving(prevShouldObserve); + } + { + assertProp(prop, key, value, vm, absent); + } + return value + } + + /** + * Get the default value of a prop. + */ + function getPropDefaultValue (vm, prop, key) { + // no default, return undefined + if (!hasOwn(prop, 'default')) { + return undefined + } + var def = prop.default; + // warn against non-factory defaults for Object & Array + if (isObject(def)) { + warn( + 'Invalid default value for prop "' + key + '": ' + + 'Props with type Object/Array must use a factory function ' + + 'to return the default value.', + vm + ); + } + // the raw prop value was also undefined from previous render, + // return previous default value to avoid unnecessary watcher trigger + if (vm && vm.$options.propsData && + vm.$options.propsData[key] === undefined && + vm._props[key] !== undefined + ) { + return vm._props[key] + } + // call factory function for non-Function types + // a value is Function if its prototype is function even across different execution context + return typeof def === 'function' && getType(prop.type) !== 'Function' + ? def.call(vm) + : def + } + + /** + * Assert whether a prop is valid. + */ + function assertProp ( + prop, + name, + value, + vm, + absent + ) { + if (prop.required && absent) { + warn( + 'Missing required prop: "' + name + '"', + vm + ); + return + } + if (value == null && !prop.required) { + return + } + var type = prop.type; + var valid = !type || type === true; + var expectedTypes = []; + if (type) { + if (!Array.isArray(type)) { + type = [type]; + } + for (var i = 0; i < type.length && !valid; i++) { + var assertedType = assertType(value, type[i]); + expectedTypes.push(assertedType.expectedType || ''); + valid = assertedType.valid; + } + } + + if (!valid) { + warn( + getInvalidTypeMessage(name, value, expectedTypes), + vm + ); + return + } + var validator = prop.validator; + if (validator) { + if (!validator(value)) { + warn( + 'Invalid prop: custom validator check failed for prop "' + name + '".', + vm + ); + } + } + } + + var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/; + + function assertType (value, type) { + var valid; + var expectedType = getType(type); + if (simpleCheckRE.test(expectedType)) { + var t = typeof value; + valid = t === expectedType.toLowerCase(); + // for primitive wrapper objects + if (!valid && t === 'object') { + valid = value instanceof type; + } + } else if (expectedType === 'Object') { + valid = isPlainObject(value); + } else if (expectedType === 'Array') { + valid = Array.isArray(value); + } else { + valid = value instanceof type; + } + return { + valid: valid, + expectedType: expectedType + } + } + + /** + * Use function string name to check built-in types, + * because a simple equality check will fail when running + * across different vms / iframes. + */ + function getType (fn) { + var match = fn && fn.toString().match(/^\s*function (\w+)/); + return match ? match[1] : '' + } + + function isSameType (a, b) { + return getType(a) === getType(b) + } + + function getTypeIndex (type, expectedTypes) { + if (!Array.isArray(expectedTypes)) { + return isSameType(expectedTypes, type) ? 0 : -1 + } + for (var i = 0, len = expectedTypes.length; i < len; i++) { + if (isSameType(expectedTypes[i], type)) { + return i + } + } + return -1 + } + + function getInvalidTypeMessage (name, value, expectedTypes) { + var message = "Invalid prop: type check failed for prop \"" + name + "\"." + + " Expected " + (expectedTypes.map(capitalize).join(', ')); + var expectedType = expectedTypes[0]; + var receivedType = toRawType(value); + var expectedValue = styleValue(value, expectedType); + var receivedValue = styleValue(value, receivedType); + // check if we need to specify expected value + if (expectedTypes.length === 1 && + isExplicable(expectedType) && + !isBoolean(expectedType, receivedType)) { + message += " with value " + expectedValue; + } + message += ", got " + receivedType + " "; + // check if we need to specify received value + if (isExplicable(receivedType)) { + message += "with value " + receivedValue + "."; + } + return message + } + + function styleValue (value, type) { + if (type === 'String') { + return ("\"" + value + "\"") + } else if (type === 'Number') { + return ("" + (Number(value))) + } else { + return ("" + value) + } + } + + function isExplicable (value) { + var explicitTypes = ['string', 'number', 'boolean']; + return explicitTypes.some(function (elem) { return value.toLowerCase() === elem; }) + } + + function isBoolean () { + var args = [], len = arguments.length; + while ( len-- ) args[ len ] = arguments[ len ]; + + return args.some(function (elem) { return elem.toLowerCase() === 'boolean'; }) + } + + /* */ + + function handleError (err, vm, info) { + // Deactivate deps tracking while processing error handler to avoid possible infinite rendering. + // See: https://github.com/vuejs/vuex/issues/1505 + pushTarget(); + try { + if (vm) { + var cur = vm; + while ((cur = cur.$parent)) { + var hooks = cur.$options.errorCaptured; + if (hooks) { + for (var i = 0; i < hooks.length; i++) { + try { + var capture = hooks[i].call(cur, err, vm, info) === false; + if (capture) { return } + } catch (e) { + globalHandleError(e, cur, 'errorCaptured hook'); + } + } + } + } + } + globalHandleError(err, vm, info); + } finally { + popTarget(); + } + } + + function invokeWithErrorHandling ( + handler, + context, + args, + vm, + info + ) { + var res; + try { + res = args ? handler.apply(context, args) : handler.call(context); + if (res && !res._isVue && isPromise(res) && !res._handled) { + res.catch(function (e) { return handleError(e, vm, info + " (Promise/async)"); }); + // issue #9511 + // avoid catch triggering multiple times when nested calls + res._handled = true; + } + } catch (e) { + handleError(e, vm, info); + } + return res + } + + function globalHandleError (err, vm, info) { + if (config.errorHandler) { + try { + return config.errorHandler.call(null, err, vm, info) + } catch (e) { + // if the user intentionally throws the original error in the handler, + // do not log it twice + if (e !== err) { + logError(e, null, 'config.errorHandler'); + } + } + } + logError(err, vm, info); + } + + function logError (err, vm, info) { + { + warn(("Error in " + info + ": \"" + (err.toString()) + "\""), vm); + } + /* istanbul ignore else */ + if ((inBrowser || inWeex) && typeof console !== 'undefined') { + console.error(err); + } else { + throw err + } + } + + /* */ + + var isUsingMicroTask = false; + + var callbacks = []; + var pending = false; + + function flushCallbacks () { + pending = false; + var copies = callbacks.slice(0); + callbacks.length = 0; + for (var i = 0; i < copies.length; i++) { + copies[i](); + } + } + + // Here we have async deferring wrappers using microtasks. + // In 2.5 we used (macro) tasks (in combination with microtasks). + // However, it has subtle problems when state is changed right before repaint + // (e.g. #6813, out-in transitions). + // Also, using (macro) tasks in event handler would cause some weird behaviors + // that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109). + // So we now use microtasks everywhere, again. + // A major drawback of this tradeoff is that there are some scenarios + // where microtasks have too high a priority and fire in between supposedly + // sequential events (e.g. #4521, #6690, which have workarounds) + // or even between bubbling of the same event (#6566). + var timerFunc; + + // The nextTick behavior leverages the microtask queue, which can be accessed + // via either native Promise.then or MutationObserver. + // MutationObserver has wider support, however it is seriously bugged in + // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It + // completely stops working after triggering a few times... so, if native + // Promise is available, we will use it: + /* istanbul ignore next, $flow-disable-line */ + if (typeof Promise !== 'undefined' && isNative(Promise)) { + var p = Promise.resolve(); + timerFunc = function () { + p.then(flushCallbacks); + // In problematic UIWebViews, Promise.then doesn't completely break, but + // it can get stuck in a weird state where callbacks are pushed into the + // microtask queue but the queue isn't being flushed, until the browser + // needs to do some other work, e.g. handle a timer. Therefore we can + // "force" the microtask queue to be flushed by adding an empty timer. + if (isIOS) { setTimeout(noop); } + }; + isUsingMicroTask = true; + } else if (!isIE && typeof MutationObserver !== 'undefined' && ( + isNative(MutationObserver) || + // PhantomJS and iOS 7.x + MutationObserver.toString() === '[object MutationObserverConstructor]' + )) { + // Use MutationObserver where native Promise is not available, + // e.g. PhantomJS, iOS7, Android 4.4 + // (#6466 MutationObserver is unreliable in IE11) + var counter = 1; + var observer = new MutationObserver(flushCallbacks); + var textNode = document.createTextNode(String(counter)); + observer.observe(textNode, { + characterData: true + }); + timerFunc = function () { + counter = (counter + 1) % 2; + textNode.data = String(counter); + }; + isUsingMicroTask = true; + } else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) { + // Fallback to setImmediate. + // Techinically it leverages the (macro) task queue, + // but it is still a better choice than setTimeout. + timerFunc = function () { + setImmediate(flushCallbacks); + }; + } else { + // Fallback to setTimeout. + timerFunc = function () { + setTimeout(flushCallbacks, 0); + }; + } + + function nextTick (cb, ctx) { + var _resolve; + callbacks.push(function () { + if (cb) { + try { + cb.call(ctx); + } catch (e) { + handleError(e, ctx, 'nextTick'); + } + } else if (_resolve) { + _resolve(ctx); + } + }); + if (!pending) { + pending = true; + timerFunc(); + } + // $flow-disable-line + if (!cb && typeof Promise !== 'undefined') { + return new Promise(function (resolve) { + _resolve = resolve; + }) + } + } + + /* */ + + var mark; + var measure; + + { + var perf = inBrowser && window.performance; + /* istanbul ignore if */ + if ( + perf && + perf.mark && + perf.measure && + perf.clearMarks && + perf.clearMeasures + ) { + mark = function (tag) { return perf.mark(tag); }; + measure = function (name, startTag, endTag) { + perf.measure(name, startTag, endTag); + perf.clearMarks(startTag); + perf.clearMarks(endTag); + // perf.clearMeasures(name) + }; + } + } + + /* not type checking this file because flow doesn't play well with Proxy */ + + var initProxy; + + { + var allowedGlobals = makeMap( + 'Infinity,undefined,NaN,isFinite,isNaN,' + + 'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' + + 'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' + + 'require' // for Webpack/Browserify + ); + + var warnNonPresent = function (target, key) { + warn( + "Property or method \"" + key + "\" is not defined on the instance but " + + 'referenced during render. Make sure that this property is reactive, ' + + 'either in the data option, or for class-based components, by ' + + 'initializing the property. ' + + 'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.', + target + ); + }; + + var warnReservedPrefix = function (target, key) { + warn( + "Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " + + 'properties starting with "$" or "_" are not proxied in the Vue instance to ' + + 'prevent conflicts with Vue internals' + + 'See: https://vuejs.org/v2/api/#data', + target + ); + }; + + var hasProxy = + typeof Proxy !== 'undefined' && isNative(Proxy); + + if (hasProxy) { + var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact'); + config.keyCodes = new Proxy(config.keyCodes, { + set: function set (target, key, value) { + if (isBuiltInModifier(key)) { + warn(("Avoid overwriting built-in modifier in config.keyCodes: ." + key)); + return false + } else { + target[key] = value; + return true + } + } + }); + } + + var hasHandler = { + has: function has (target, key) { + var has = key in target; + var isAllowed = allowedGlobals(key) || + (typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data)); + if (!has && !isAllowed) { + if (key in target.$data) { warnReservedPrefix(target, key); } + else { warnNonPresent(target, key); } + } + return has || !isAllowed + } + }; + + var getHandler = { + get: function get (target, key) { + if (typeof key === 'string' && !(key in target)) { + if (key in target.$data) { warnReservedPrefix(target, key); } + else { warnNonPresent(target, key); } + } + return target[key] + } + }; + + initProxy = function initProxy (vm) { + if (hasProxy) { + // determine which proxy handler to use + var options = vm.$options; + var handlers = options.render && options.render._withStripped + ? getHandler + : hasHandler; + vm._renderProxy = new Proxy(vm, handlers); + } else { + vm._renderProxy = vm; + } + }; + } + + /* */ + + var seenObjects = new _Set(); + + /** + * Recursively traverse an object to evoke all converted + * getters, so that every nested property inside the object + * is collected as a "deep" dependency. + */ + function traverse (val) { + _traverse(val, seenObjects); + seenObjects.clear(); + } + + function _traverse (val, seen) { + var i, keys; + var isA = Array.isArray(val); + if ((!isA && !isObject(val)) || Object.isFrozen(val) || val instanceof VNode) { + return + } + if (val.__ob__) { + var depId = val.__ob__.dep.id; + if (seen.has(depId)) { + return + } + seen.add(depId); + } + if (isA) { + i = val.length; + while (i--) { _traverse(val[i], seen); } + } else { + keys = Object.keys(val); + i = keys.length; + while (i--) { _traverse(val[keys[i]], seen); } + } + } + + /* */ + + var normalizeEvent = cached(function (name) { + var passive = name.charAt(0) === '&'; + name = passive ? name.slice(1) : name; + var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first + name = once$$1 ? name.slice(1) : name; + var capture = name.charAt(0) === '!'; + name = capture ? name.slice(1) : name; + return { + name: name, + once: once$$1, + capture: capture, + passive: passive + } + }); + + function createFnInvoker (fns, vm) { + function invoker () { + var arguments$1 = arguments; + + var fns = invoker.fns; + if (Array.isArray(fns)) { + var cloned = fns.slice(); + for (var i = 0; i < cloned.length; i++) { + invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler"); + } + } else { + // return handler return value for single handlers + return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler") + } + } + invoker.fns = fns; + return invoker + } + + function updateListeners ( + on, + oldOn, + add, + remove$$1, + createOnceHandler, + vm + ) { + var name, def$$1, cur, old, event; + for (name in on) { + def$$1 = cur = on[name]; + old = oldOn[name]; + event = normalizeEvent(name); + if (isUndef(cur)) { + warn( + "Invalid handler for event \"" + (event.name) + "\": got " + String(cur), + vm + ); + } else if (isUndef(old)) { + if (isUndef(cur.fns)) { + cur = on[name] = createFnInvoker(cur, vm); + } + if (isTrue(event.once)) { + cur = on[name] = createOnceHandler(event.name, cur, event.capture); + } + add(event.name, cur, event.capture, event.passive, event.params); + } else if (cur !== old) { + old.fns = cur; + on[name] = old; + } + } + for (name in oldOn) { + if (isUndef(on[name])) { + event = normalizeEvent(name); + remove$$1(event.name, oldOn[name], event.capture); + } + } + } + + /* */ + + function mergeVNodeHook (def, hookKey, hook) { + if (def instanceof VNode) { + def = def.data.hook || (def.data.hook = {}); + } + var invoker; + var oldHook = def[hookKey]; + + function wrappedHook () { + hook.apply(this, arguments); + // important: remove merged hook to ensure it's called only once + // and prevent memory leak + remove(invoker.fns, wrappedHook); + } + + if (isUndef(oldHook)) { + // no existing hook + invoker = createFnInvoker([wrappedHook]); + } else { + /* istanbul ignore if */ + if (isDef(oldHook.fns) && isTrue(oldHook.merged)) { + // already a merged invoker + invoker = oldHook; + invoker.fns.push(wrappedHook); + } else { + // existing plain hook + invoker = createFnInvoker([oldHook, wrappedHook]); + } + } + + invoker.merged = true; + def[hookKey] = invoker; + } + + /* */ + + function extractPropsFromVNodeData ( + data, + Ctor, + tag + ) { + // we are only extracting raw values here. + // validation and default values are handled in the child + // component itself. + var propOptions = Ctor.options.props; + if (isUndef(propOptions)) { + return + } + var res = {}; + var attrs = data.attrs; + var props = data.props; + if (isDef(attrs) || isDef(props)) { + for (var key in propOptions) { + var altKey = hyphenate(key); + { + var keyInLowerCase = key.toLowerCase(); + if ( + key !== keyInLowerCase && + attrs && hasOwn(attrs, keyInLowerCase) + ) { + tip( + "Prop \"" + keyInLowerCase + "\" is passed to component " + + (formatComponentName(tag || Ctor)) + ", but the declared prop name is" + + " \"" + key + "\". " + + "Note that HTML attributes are case-insensitive and camelCased " + + "props need to use their kebab-case equivalents when using in-DOM " + + "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\"." + ); + } + } + checkProp(res, props, key, altKey, true) || + checkProp(res, attrs, key, altKey, false); + } + } + return res + } + + function checkProp ( + res, + hash, + key, + altKey, + preserve + ) { + if (isDef(hash)) { + if (hasOwn(hash, key)) { + res[key] = hash[key]; + if (!preserve) { + delete hash[key]; + } + return true + } else if (hasOwn(hash, altKey)) { + res[key] = hash[altKey]; + if (!preserve) { + delete hash[altKey]; + } + return true + } + } + return false + } + + /* */ + + // The template compiler attempts to minimize the need for normalization by + // statically analyzing the template at compile time. + // + // For plain HTML markup, normalization can be completely skipped because the + // generated render function is guaranteed to return Array. There are + // two cases where extra normalization is needed: + + // 1. When the children contains components - because a functional component + // may return an Array instead of a single root. In this case, just a simple + // normalization is needed - if any child is an Array, we flatten the whole + // thing with Array.prototype.concat. It is guaranteed to be only 1-level deep + // because functional components already normalize their own children. + function simpleNormalizeChildren (children) { + for (var i = 0; i < children.length; i++) { + if (Array.isArray(children[i])) { + return Array.prototype.concat.apply([], children) + } + } + return children + } + + // 2. When the children contains constructs that always generated nested Arrays, + // e.g.