BlueDavy之技術Blog

??1 /**/ /*
??2 ?*?============================================================
??3 ?*?------------------------------------------------------------
??4 ?*?Author:?Bluedavy?(Bluedavy.blogjava.net)
??5 ?*?------------------------------------------------------------
??6 ?*?事件管理器
??7 ?*?1、事件的注冊/反注冊
??8 ?*?2、事件的調用
??9 ?*?3、事件的攔截器(事件執行前和事件執行后)
?10 ?*?4、攔截器的有效范圍
?11 ?*?5、事件執行的有效范圍
?12 ?*?TODO：COR?Pattern
?13 ?*?============================================================
?14 ? */
?15 ? var ?EventManager = Class.create();
?16 ?
?17 ? // ?事件集合
?18 ?EventManager.events = {} ;
?19 ?
?20 ? // ?事件攔截器集合
?21 ?EventManager.interceptors = {} ;
?22 ?
?23 ? // ?常量定義
?24 ?EventManager.Constant = {
?25 ?????SCOPE: " __ALL__ "
?26 ?}
?27 ?
?28 ? // ?注冊事件
?29 ?EventManager.registerEvent = function (eventalias,event,scope) {
?30 ????? if ( typeof (scope) == 'undefined') {
?31 ?????????scope = EventManager.Constant.SCOPE;
?32 ?????}
?33 ????? if (EventManager.events[scope] == null ) {
?34 ?????????EventManager.events[scope] = {} ;
?35 ?????}
?36 ?????EventManager.events[scope][eventalias] = event;
?37 ?}
?38 ?
?39 ? // ?反注冊事件
?40 ?EventManager.unregisterEvent = function (eventalias,scope) {
?41 ????? if ( typeof (scope) == 'undefined') {
?42 ?????????scope = EventManager.Constant.SCOPE;
?43 ?????}
?44 ?????EventManager.events[scope][eventalias] = null ;
?45 ?}
?46 ?
?47 ? // ?攔截器常量定義
?48 ?EventManager.Interceptor = {
?49 ?????BEFORE: " before " ,
?50 ?????AFTER: " after "
?51 ?}
?52 ?
?53 ? // ?清除某范圍內的事件以及攔截器
?54 ?EventManager.clear = function (scope) {
?55 ????? if ( typeof (scope) == 'undefined') {
?56 ?????????EventManager.events = {} ;????
?57 ?????????EventManager.interceptors = {} ;
?58 ?????}
?59 ????? else {
?60 ?????????EventManager.events[scope] = null ;
?61 ?????????EventManager.interceptors[scope] = null ;????
?62 ?????}
?63 ?}
?64 ?
?65 ? // ?事件直接調用
?66 ?EventManager.directyinvoke = function (eventalias,params,scope) {
?67 ????? if ( typeof (scope) == 'undefined') {
?68 ?????????scope = EventManager.Constant.SCOPE;
?69 ?????}
?70 ????? if (EventManager.events[scope] == null ) {
?71 ????????? return ;
?72 ?????}
?73 ????? var ?bindevent = EventManager.events[scope][eventalias];
?74 ????? if (bindevent != null ) {
?75 ????????? try {
?76 ?????????????EventManager.invokeInterceptor(eventalias,EventManager.Interceptor.BEFORE,params,scope);
?77 ????????????? if ( typeof (params) == 'undefined') {
?78 ?????????????????bindevent.apply( this ,[event]);
?79 ?????????????}
?80 ????????????? else {
?81 ?????????????????params.push(event);
?82 ?????????????????bindevent.apply( this ,params);
?83 ?????????????}
?84 ?????????????EventManager.invokeInterceptor(eventalias,EventManager.Interceptor.AFTER,params,scope);
?85 ?????????}
?86 ????????? catch (e) {
?87 ????????????? // ?不做任何提示
?88 ?????????????alert(e);
?89 ?????????}
?90 ?????}
?91 ?}
?92 ?
?93 ? // ?事件的調用(用于綁定到元素的事件上)
?94 ?EventManager.invoke = function (eventalias,params,scope) {
?95 ????? return ? function () {
?96 ?????????EventManager.directyinvoke(eventalias,params,scope);
?97 ?????}
?98 ?}
?99 ?
100 ? // ?執行攔截器
101 ?EventManager.invokeInterceptor = function (eventalias,type,params,scope) {
102 ????? if (EventManager.interceptors[scope] == null ) {
103 ????????? return ;
104 ?????}
105 ????? var ?interceptors = EventManager.interceptors[scope][eventalias];
106 ????? if ( typeof (interceptors) == 'undefined') {
107 ????????? return ;
108 ?????}
109 ????? var ?typeInterceptors = interceptors[type];
110 ????? if (typeInterceptors == null ) {
111 ????????? return ;
112 ?????}
113 ????? for ( var ?i = 0 ;i < typeInterceptors.length;i ++ ) {
114 ????????? try {
115 ????????????? if ( typeof (params) == 'undefined') {
116 ?????????????????typeInterceptors[i].apply( this ,[event]);
117 ?????????????}
118 ????????????? else {
119 ?????????????????params.push(event);
120 ?????????????????typeInterceptors[i].apply( this ,params);
121 ?????????????}
122 ?????????}
123 ????????? catch (e) {
124 ?????????????alert(e);
125 ?????????}
126 ?????}
127 ?}
128 ?
129 ? // ?注冊方法執行前的攔截器
130 ?EventManager.addBeforeInterceptor = function (eventalias,interceptor,scope) {
131 ?????EventManager.addInterceptor(eventalias,interceptor,EventManager.Interceptor.BEFORE,scope);
132 ?}
133 ?
134 ? // ?刪除方法執行前的攔截器
135 ?EventManager.removeBeforeInterceptor = function (eventalias,interceptor,scope) {
136 ?????EventManager.removeInterceptor(eventalias,interceptor,EventManager.Interceptor.BEFORE,scope);
137 ?}
138 ?
139 ? // ?注冊方法執行后的攔截器
140 ?EventManager.addAfterInterceptor = function (eventalias,interceptor,scope) {
141 ?????EventManager.addInterceptor(eventalias,interceptor,EventManager.Interceptor.AFTER,scope);
142 ?}
143 ?
144 ? // ?刪除方法執行后的攔截器
145 ?EventManager.removeAfterInterceptor = function (eventalias,interceptor,scope) {
146 ?????EventManager.removeInterceptor(eventalias,interceptor,EventManager.Interceptor.AFTER,scope);
147 ?}
148 ?
149 ? // ?添加攔截器
150 ?EventManager.addInterceptor = function (eventalias,interceptor,type,scope) {
151 ????? if ( typeof (scope) == 'undefined') {
152 ?????????scope = EventManager.Constant.SCOPE;
153 ?????}
154 ????? if (EventManager.interceptors[scope] == null ) {
155 ?????????EventManager.interceptors[scope] = {} ;
156 ?????}
157 ????? var ?interceptors = EventManager.interceptors[scope][eventalias];
158 ????? if (interceptors == null ) {
159 ?????????interceptors = {} ;
160 ?????}
161 ????? if (interceptors[type] == null ) {
162 ?????????interceptors[type] = new ?Array();
163 ?????}
164 ?????interceptors[type].push(interceptor);
165 ?????EventManager.interceptors[scope][eventalias] = interceptors;
166 ?}
167 ?
168 ? // ?刪除攔截器
169 ?EventManager.removeInterceptor = function (eventalias,interceptor,type,scope) {
170 ????? if ( typeof (scope) == 'undefined') {
171 ?????????scope = EventManager.Constant.SCOPE;
172 ?????}
173 ????? if (EventManager.interceptors[scope] == null ) {
174 ????????? return ;
175 ?????}
176 ????? var ?interceptors = EventManager.events[scope][eventalias];
177 ????? if (interceptors == null ) {
178 ????????? return ;
179 ?????}
180 ????? if (interceptors[type] == null ) {
181 ????????? return ;
182 ?????}
183 ?????interceptors[type].pop(interceptor);
184 ?????EventManager.interceptors[scope][eventalias] = interceptors;
185 ?}