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model.js
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model.js
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/**
* 页面模型
* created by dorsywang
* 页面逻辑层的封装
* @2014-7-29 增加注释文档
*/
(function(){
/**
* new一个obj
*/
var DB = {
cgiHttp: function(opt){
$.ajax({
url: opt.url,
data: opt.param,
success: function(data){
opt.succ(data);
},
error: function(data){
opt.error(data);
}
});
}
};
var Tmpl = function(tmpl, data, tool){
return {
appendTo: function(container){
$(container).append(tmpl);
}
};
};
var newObject = function(func){
var obj = {};
func(obj);
obj.__proto__ = func.prototype;
return obj;
};
/**
* 根据cgi和参数生成对应的localStorge
* 要去除类似随机数的参数
*/
var getKey = function(cgiName, param){
var o = {};
for(var i in param){
if(i === "from" || i === "sid" || i === "bkn"){
continue;
}
o[i] = param[i];
}
var key = cgiName + "_" + JSON.stringify(o);
return key;
};
var emptyFunc = function(){};
// 逐步代替scrollHandle
// scrollHelper复制一份 便于model控制
var preScrollTop = 0;
var scrollHandlerMap = {
};
var scrollHelper = {
init:function(opt){
this.container = $(opt.container);
this.scollEndCallback = opt.scollEndCallback;
this.scrollToBottomCallback = opt.scrollToBottomCallback;
this.scrollToHalfCallback = opt.scrollToHalfCallback;
this.bindHandler();
},
bindHandler:function(){
this.container.on("scroll", $.proxy(this.onScroll,this));
},
setScrollEl: function(el){
this.container.off("scroll", $.proxy(this.onScroll,this));
this.container = el;
this.bindHandler();
},
removeModel: function(model){
var scrollEl = model._scrollEl;
var el = scrollEl;
if(typeof scrollEl == "string"){
el = $(scrollEl);
}
if(el.attr("id")){
var id = el.attr("id");
delete scrollHandlerMap[id];
}
},
addModel: function(model){
var scrollEl = model._scrollEl;
var el = scrollEl;
if(typeof scrollEl == "string"){
el = $(scrollEl);
}
var id;
if(el == window){
id = '__window__';
}else{
id = el.attr("id");
if(id){
}else{
id = "d_" + ~~ (100000 * Math.random());
el.attr("id", id);
}
}
if(scrollHandlerMap[id]){
scrollHandlerMap[id].push(model);
}else{
scrollHandlerMap[id] = [model];
this.init({
container: el,
scrollToHalfCallback: function(){
scrollHandlerMap[id].map(function(item){
if(! item.canScrollInMTB){
return;
}
if(item.type == "scrollModel"){
if(! item.freezed && item.scrollEnable){
item.rock();
}
}else{
if(! item.freezed && item.currModel.type == "scrollModel" && !item.currModel.freezed && item.currModel.scrollEnable){
item.currModel.rock();
}
}
});
}
});
}
},
//滚动事件
onScroll:function(e){
var self = this;
var container = e.target;
var scrollTop,
scrollHeight,
windowHeight;
//android 和 ios 5以下版本
if(container == document){
scrollTop = window.scrollY;
windowHeight = window.innerHeight;
scrollHeight = document.body.scrollHeight;
}
//ios 5+版本
else{
var style = window.getComputedStyle(container);
scrollTop = container.scrollTop;
windowHeight = parseInt(style.height) + parseInt(style.paddingTop) + parseInt(style.paddingBottom) + parseInt(style.marginTop) + parseInt(style.marginBottom);
scrollHeight = container.scrollHeight;
}
//滚动到2/3处
if (scrollTop + windowHeight >= scrollHeight * 2 / 3 && scrollTop > preScrollTop) {
this.scrollToHalfCallback && this.scrollToHalfCallback(e);
}
//滚动到底部
else if(scrollTop + windowHeight >= scrollHeight){
this.scrollToBottomCallback && this.scrollToBottomCallback(e);
}
preScrollTop = scrollTop;
}
};
//记录是不是第一次进来
var isFirstRender = 1;
var _containerCountInfo = {};
/**
* 普通的页面渲染模型
*/
var renderModel = function(opt){
// 使用空func便于后续支持更便捷的对象继承方式
// 比如 var a = new RenderModel({});
// var b = new a(); // b继承自a
var func = function(o){
};
func.renderTmpl = opt.tmpl; //渲染的模板
func.cgiName = opt.url; //请求的cgi
func.wrapper = opt.wrapper; //要渲染到的dom元素，支持selector和元素
func.param = opt.param; //请求的参数，可以是对象 或者 function
func.beforeRequest = opt.beforeRequest || function(){};
func.processData = opt.processData; //对数据进行的加工处理 这时不允许对view层做修改
func.data = opt.data; //如果存在data就会直接用data的数据而不用去请求cgi
func.renderTool = opt.tool; //渲染模板的时候可以传入一个工具函数对象，在view层使用
func.onreset = opt.onreset; //模型被重置时候做的处理
func.events = opt.events; //模型注册的事件
func.complete = opt.complete; //模型完成渲染后进行的操作，这时候可以进行view层的修改
func.myData = opt.myData; //自定义数据
func.error = opt.error; //cgi出错时候的处理
func.noRefresh = opt.noRefresh || 0; //是不是自己提供refresh方法
func.scrollEl = opt.scrollEl || null;
func.paramCache = []; //参数的请求缓存
func.cgiCount = 0; //cgi的请求次数
func.dataCache = []; //cgi回来的data缓存
func.feedPool = []; //需要喂养数据的模型池
func.isFirstRender = 1; //标记是不是第一次渲染模型
func.eventsBinded = 0; //标记事件是不是被注册绑定过了
func.isFirstDataRequestRender = 0; //标记是不是第一次发cgi请求进行渲染
//是否使用预加载模式
func.usePreLoad = opt.usePreLoad;
func.__proto__ = renderModel.prototype; //不解释
func.prototype = func; //不解释
if(opt.wrapper){
/*
if(typeof opt.wrapper !== "string"){
}
*/
if(_containerCountInfo[opt.wrapper]){
_containerCountInfo[opt.wrapper] ++;
}else{
_containerCountInfo[opt.wrapper] = 1;
}
}
return func;
};
/**
* 普通渲染模型的原型链
*/
renderModel.prototype = {
// 类型
type: "renderModel",
// 外放tab
exportTab: function(selector){
var key = "recieveModel" + selector;
if(window[key] && typeof window[key] === "function"){
window[key](selector, this);
}
},
// cgi取数据
getData: function(callback){
var _this = this;
// 如果之前有发过请求，则使用缓存的参数池中对应的参数，否则使用param方法构造参数
var param = _this.paramCache[_this.cgiCount] || (typeof this.param == "object" && this.param) || (typeof this.param === "function" && this.param.call(this)) || {};
var opt = {
url: this.cgiName,
param: param,
succ: function(res, isLocalRender){
// isLocalRender标记是从localStroage中取到的数据 直接执行回调
if(isLocalRender){
callback(res);
return;
}
// 更新此次的缓存cgi数据和请求参数数据
_this.dataCache[_this.cgiCount] = res;
_this.paramCache[_this.cgiCount] = param;
// cgi请求参数自增
_this.cgiCount ++;
// 如果是第一次从cgi请求的数据 则缓存数据到localStrage里面
if(_this.cgiCount == 1){
var key = getKey(_this.cgiName, param);
try{
window.localStorage.setItem(key, JSON.stringify(res));
}catch(e){
window.localStorage.clear();
window.localStorage.setItem(key, JSON.stringify(res));
}
}
//执行回调
callback(res);
},
err: function(res){
_this.paramCache[_this.cgiCount] = param;
_this.cgiCount ++;
_this.error && _this.error(res, _this.cgiCount);
}
};
//使用预加载数据相关逻辑
if(this.usePreLoad && this.preLoadData){
//取消预加载模式，方面model后面可以继续使用常规的加载模式
this.usePreLoad = false;
//非正常预加载数据，走原有逻辑发cgi重试
if(this.preLoadData.type != 'error' && this.preLoadData.retcode == 0){
//预加载数据模式的数据保存与渲染
opt.succ(this.preLoadData);
return;
}
// else{
// 出错的话重新先走缓存，再走cgi拉的原有逻辑
// this.cgiCount = 0;
// this.isFirstRender = 1;
// }
}
//如果是第一次渲染，且cgi也还没有发送请求 那么 使用缓存中数据
if(_this.cgiCount == 0 && _this.isFirstRender){
var localData;
var key = getKey(this.cgiName, param);
localData = JSON.parse(window.localStorage.getItem(key) || "{}");;
if(localData.result){
try{
opt.succ(localData, 1);
}catch(e){
}
}
_this.isFirstRender = 0;
}
// 如果缓存中有数据 使用缓存数据 否则发送请求
if(this.dataCache[_this.cgiCount]){
opt.succ(this.dataCache[_this.cgiCount]);
}
//使用预加载数据模式的话，没有缓存也不发请求了，静待预加载数据返回即可
else if(!this.usePreLoad){
DB.cgiHttp(opt);
}
else{
_this.paramCache[_this.cgiCount] = param;
}
},
clearLocalData:function(cgiCount){
var param = this.paramCache[cgiCount || 0];
var key = getKey(this.cgiName, param);
window.localStorage.removeItem(key);
},
//设置预加载数据
setPreLoadData:function(res){
this.preLoadData = res;
},
/**
* 模型重置
* 清空container, 并且用缓存数据重新渲染(如果有缓存数据，没有则继续发布请求)
*/
reset: function(){
/*
var container = this.wrapper;
if(typeof container == "string"){
container = $(container);
}
container.html("");
*/
this.cgiCount = 0;
this.melt();
this.onreset && this.onreset();
},
render: function(container, isReplace){
var _this = this;
this.scrollEnable = 0;
if(typeof container === "string"){
container = $(container);
}
this.beforeRequest && this.beforeRequest();
if(this.cgiName){
this.getData(function(data){
if(_this.cgiCount == 1) {
_this.onreset && _this.onreset();
container.html("");
}
_this.processData && _this.processData.call(_this, data, _this.cgiCount);
Tmpl(_this.renderTmpl, data.result || data, _this.renderTool || {}).appendTo(container);
_this.scrollEnable = 1;
if(_this.eventsBinded){
}else{
_this.events && _this.events();
if(_this.hasOwnProperty("eventsBinded")){
_this.eventsBinded = 1;
}else{
_this.__proto__.eventsBinded = 1;
}
}
_this.feedPool.map(function(item){
if (!item.noFeed) {
item.setFeedData(data, _this.cgiCount);
item.rock();
}
});
_this.complete && _this.complete(data, _this.cgiCount);
_this.isFirstDataRequestRender ++;
});
}else{
if(this.data){
if(typeof this.data == "function"){
this.data = this.data();
}
}else{
this.data = {};
}
if(this.data){
_this.processData && _this.processData.call(this, this.data, _this.cgiCount);
container.html("");
Tmpl(_this.renderTmpl, this.data.result || this.data, _this.renderTool).update(container);
if(_this.eventsBinded){
}else{
_this.events && _this.events();
if(_this.hasOwnProperty("eventsBinded")){
_this.eventsBinded = 1;
}else{
_this.__proto__.eventsBinded = 1;
}
}
_this.scrollEnable = 1;
_this.feedPool.map(function(item){
if (!item.noFeed) {
item.setFeedData(this.data, _this.cgiCount);
item.rock();
}
});
_this.complete && _this.complete(this.data, _this.cgiCount);
_this.isFirstDataRequestRender ++;
}
}
},
/**
* rock
*/
rock: function(){
this.render(this.wrapper, 1);
},
processData: function(data){
},
//用自己辛苦拿到的数据哺乳另一个模型
feed: function(model){
this.feedPool.push(model);
model.feeded = 1;
},
setFeedData: function(data, cgiCount){
this.data = data;
this.cgiCount = cgiCount;
},
/**
* 用新的数据对更新模型
*/
update: function(data){
this.data = data;
this.reset();
this.rock();
},
//只刷新数据不更新视图
resetData: function(){
this.dataCache = [];
this.cgiCount = 0;
this.onreset && this.onreset();
},
/**
* 重新请求cgi刷新模型
*/
refresh: function(){
if(this.noRefresh){
}else{
this.dataCache = [];
this.reset();
this.rock();
}
},
/**
* 隐藏模型
*/
hide: function(){
var container = this.wrapper;
if(typeof container === "string"){
container = $(container);
}
container.hide();
},
/**
* 显示模型
*/
show: function(){
var container = this.wrapper;
if(typeof container === "string"){
container = $(container);
}
container.show();
},
/**
* 继承模型
*/
extend: function(opt){
var func = function(){
};
var events = opt.events;
func.prototype = this;//object;
var clone = new func();
clone.feedPool = [];
clone.cgiCount = 0;
clone.dataCache = [];
clone.isFirstDataRequestRender = 0;
clone.isFirstRender = 1;
clone._addedToModel = 0;
//如果重新定义了param 不使用缓存
if(opt.param){
clone.paramCache = [];
}
for(var i in opt){
clone[i] = opt[i];
}
//如果定义了事件 就不使用原来的事件
if(events){
clone.events = function(){
events && events.call(this);
};
clone.eventsBinded = 0;
}
if(clone.wrapper){
if(_containerCountInfo[clone.wrapper]){
_containerCountInfo[clone.wrapper] ++;
}else{
_containerCountInfo[clone.wrapper] = 1;
}
}
return clone;
},
freeze: function(){
this.freezed = 1;
},
melt: function(){
this.freezed = 0;
}
};
var scrollHanderPool = [];
var scrollDom = window;
if($.os.ios){
scrollDom = "#js_bar_main";
if($(scrollDom)[0] == document.body){
scrollDom = window;
}
}
var scrollArea = scrollDom;
var scrollModel = function(opt){
var Render = new renderModel(opt);
Render.scrollEnable = 1;
Render.__proto__.eventsBinded = 0;
Render.type = "scrollModel";
Render._scrollEl = opt.scrollEl || opt.wrapper || ($.os.ios ? "#js_bar_main" : window);
Render._ctlByMutitab = 0;
var events = Render.events;
Render.events = function(){
events && events.call(this);
};
Render.renderContent = function(){
this.render(this.wrapper, 1);
};
Render._addedToModel = 0;
Render.rock = function(){
this.render(this.wrapper, 1);
if(! this._addedToModel){
ScrollHelper.addModel(this);
this._addedToModel = 1;
}
};
return Render;
};
// 虚模型 待实现模型
// @todo 进一步封装
var abstractModel = function () {
};
abstractModel.prototype = {
type: "abstractModel",
rock: function(){
},
reset: function () {
},
refresh: function () {
},
freeze: function () {
},
resetData: function(){
}
};
var cgiModel = function(opt){
this.cgiName = opt.cgiName;
this.param = opt.param;
this.processData = opt.processData;
this.complete = opt.complete;
this.error = opt.error;
this.paramCache = [];
this.cgiCount = 0;
this.dataCache = [];
this.feedPool = [];
this.isFirstRender = 1;
this.eventsBinded = 0;
this.isFirstDataRequestRender = 0;
};
cgiModel.prototype = {
getData: renderModel.prototype.getData,
rock: function(){
var _this = this;
this.getData(function(data){
_this.processData && _this.processData(data, _this.cgiCount);
_this.complete && _this.complete(data, _this.cgiCount);
});
},
reset: function(){
this.dataCache = [];
},
refresh: function(){
this.dataCache = [];
this.rock();
},
extend: renderModel.prototype.extend
};
var handlers = {
onScrollEnd: function(){},
onScrollToBottom: function(){},
onScrollToHalf: function(){
scrollHanderPool.map(function(item, index){
if(! item.canScrollInMTB){
return;
}
if(item.type == "scrollModel"){
if(! item.freezed && item.scrollEnable){
item.rock();
return;
}
}else{
if(! item.freezed && item.currModel.type == "scrollModel" && !item.currModel.freezed && item.currModel.scrollEnable){
item.currModel.rock();
}
}
});
}
};
scrollHelper.init({
container: scrollArea,
scollEndCallback: handlers.onScrollEnd,
scrollToBottomCallback: handlers.onScrollToBottom,
scrollToHalfCallback: handlers.onScrollToHalf
});
/**
* 多tab切换管理模型
*/
var mutitabModel = function(){
this.pool = [];
this.currModel = null;
this.eventBinded = 0;
};
mutitabModel.prototype = {
_bindSwitchEvent: function(){
var _this = this;
if(! this.eventBinded){
$("body").on("tap", function(e){
var target = $(e.target);
var containerCountInfo = _containerCountInfo;
var currentModel = [];
var indexArr = []
for(var i = 0; i < _this.pool.length; i ++){
var selector = _this.pool[i][0];
var hittedEl = target.closest(selector);
if(hittedEl && hittedEl.length){
currentModel.push(_this.pool[i]);
indexArr.push(i);
}
}
if(currentModel.length){
var item = currentModel[0];
var selector = item[0];
var smodel = item[1];
if(typeof smodel === "string"){
var key = "recieveModel" + selector;
window[key] = function(selector, model){
if(selector && model){
_this.pool[indexArr[0]] = [selector, model];
window[key] = null;
delete window[key];
_this.rock(selector);
}
};
loadjs.loadModule(smodel);
return;
}
_this.currModel = smodel;
smodel.canScrollInMTB = 1;
_this.beforeTabHandler && _this.beforeTabHandler.call(_this, selector, 'switch')
// render container为空的情况
if(! smodel.wrapper){
if(smodel.type === "pageModel"){
_this.currModel._switchedToPage();
}
}else{
if(containerCountInfo[smodel.wrapper] > 1){
_this.currModel.reset();
_this.currModel.rock();
}else{
if(smodel.isFirstDataRequestRender > 0){
}else{
smodel.rock();
}
}
}
if(_this.currModel.type == "linkModel") {
_this.tabHander && _this.tabHander.call(_this, selector, 'switch');
return;
}
_this.pool.map(function(item){
var s = item[0];
if(item[1] !== smodel){
if(typeof item[1] !== "string"){
item[1].hide();
item[1].canScrollInMTB = 0;
$(s).removeClass('active')
.removeClass('selected');
}
}
});
$(selector).addClass('active')
.addClass('selected');
smodel.show();
_this.tabHander && _this.tabHander.call(_this, selector, 'switch');
}
});
this.eventBinded = 1;
}else{
}
},
rock: function(_selector){
var _this = this;
var initedSmodelInfo;
var containerCountInfo = _containerCountInfo;
for(var index = 0; index < this.pool.length; index ++){
var item = this.pool[index];
var selector = item[0];
var smodel = item[1];
if(this.initTab){
if(selector === this.initTab){
initedSmodelInfo = [selector, smodel, index];
}
}else{
if(_selector){
if(_selector === selector) {
initedSmodelInfo = [selector, smodel, index];
}
}else{
if(index === 0){
initedSmodelInfo = [selector, smodel, index];
}
}
}
}
if(! initedSmodelInfo){
console.info("Model cannot init mutitab, check if selector exists!");
return;
}
this._bindSwitchEvent();
var selector = initedSmodelInfo[0];
var smodel = initedSmodelInfo[1];
var index = initedSmodelInfo[2];
if(typeof smodel === "string"){
var key = "recieveModel" + selector;
window[key] = function(selector, model){
if(selector && model){
_this.pool[index] = [selector, model];
window[key] = null;
delete window[key];
model.scrollEnable = 0;
_this.rock(selector);
}
};
loadjs.loadModule(smodel);
return;
}
this.beforeTabHandler && this.beforeTabHandler.call(this, selector, 'switch')
smodel.canScrollInMTB = 1;
this.currModel = smodel;
this.currModel.reset();
this.currModel.rock();
this.pool.map(function(item){
var m = item[1];
if(m !== smodel){
if(typeof m === "string"){
}else{
$(item[0]).removeClass('active')
.removeClass('selected');
m.hide();
m.canScrollInMTB = 0;
}
}
});
$(selector).addClass('active')
.addClass('selected');
this.currModel.show();
this.scrollEnable = this.currModel.scrollEnable;
this.tabHander && this.tabHander.call(this, selector, 'init');
},
add: function(selector, smodel){
smodel._modelSelector = selector;
this.pool.push([selector, smodel]);
smodel.controller = this;
if(typeof smodel === "string"){
if(window.loadJsConfig && window.loadJsConfig.modules){
if(! window.loadJsConfig.modules[smodel]){
console.info("mutitab connot load lazymodel while " + smodel + " not exists in loadJsConfig modules!");
}
}
}else{
smodel.scrollEnable = 0;
}
},