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content.js
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content.js
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/*
---
script: content.js
description: core content update routines
copyright: (c) 2011 Contributors in (/AUTHORS.txt).
license: MIT-style license in (/MIT-LICENSE.txt).
requires:
- MochaUI/MUI
- Core/Request
- More/Request.JSONP
provides: [MUI.Content]
...
*/
MUI.Content = Object.append((MUI.Content || {}), {
Providers: {},
Filters: {},
callBacks: {},
update: function(content){
// set defaults for options
/* content = Object.append({
instance: null, // the instance of the control to be updated, this is normally used internally only
element: null, // the element to inject into, or the instance name
method: null, // the method to use to make request, 'POST' or 'GET'
data: null, // the data payload to send to the url
content: null, // used to feed content instead of requesting from a url endpoint
clear: false, // setting to true forces current content to be cleared
loadMethod: null, // the provider that will be used to make the request
url: null, // the url endpoint to make the request to
prepUrl: null, // callback that is executed to prepare the url. syntax: prepUrl.run([url,values,instance],this) return url;
require: {}, // used to add additional css, images, or javascript
paging: {}, // used to specify paging parameters
filters: [], // used to make post request processing/filtering of data, can be used to convert request to JSON
persist: false // true if you want to persist the request, false if you do not.
// if it is a string value the string will be used to persist the data instead of the request URL.
// if it is an array, it will assume the array is an array of strings and each string represents a cache key that is also the name of a hash value that needs to cached individually.
//onLoaded: null // fired when content is loaded
}, content);*/
// set defaults for require option
content.require = Object.append({
css: [], // the style sheets to load before the request is made
images: [], // the images to preload before the request is made
js: [], // the JavaScript that is loaded and called after the request is made
onload: function(){
}// the event that is fired after all required files are loaded
}, content.require);
// set defaults for paging
content.paging = Object.append(MUI.Content.PagingOptions, content.paging);
// detect subcontrol content
if (content.control){
if (!content.options) content.options = {};
if (content.url) content.options.url = content.url;
if (content.loadMethod) content.options.loadMethod = content.loadMethod;
content.loadMethod = 'control';
}
// make sure loadMethod has a value
if (!content.loadMethod){
if (instance == null || instance.options == null || !instance.options.loadMethod){
if (!content.url) content.loadMethod = 'html';
else content.loadMethod = 'xhr';
} else {
content.loadMethod = instance.options.loadMethod;
}
}
var instance = content.instance;
var element = content.element = $(content.element);
if (!instance && element) instance = element.retrieve('instance');
content.instance = instance;
// -- argument pre-processing override --
// allow controls to process any custom arguments, titles, scrollbars, etc..
if (instance && instance.updateStart) instance.updateStart(content);
// no content or url and not a subcontrol? nothing else to do beyond this point
if (!content.url && !content.content && content.loadMethod != 'control'){
if (content.clear){
if (instance && instance.updateClear) removeContent = instance.updateClear(content);
if (element) element.empty().show();
}
return content;
}
// replace in path replacement fields, and prepare the url
content.doPrepUrl = (function(prepUrl){
return function(content){
if (content.url){
// create standard field replacements from data, paging, and path hashes
var values = Object.merge(content.data || {}, content.paging || {}, MUI.options.path || {});
// call the prepUrl callback if it was defined
if (prepUrl) return prepUrl.apply(this, [content.url, values, instance]);
return MUI.replaceFields(content.url, values);
}
};
})(content.prepUrl);
// -- content removal --
// allow controls option to clear their own content
var removeContent = content.clear;
if (instance && instance.updateClear) removeContent = instance.updateClear(content);
// Remove old content.
if (removeContent && element) element.empty().show();
// prepare function to persist the data
if (content.persist && MUI.Content.Providers[content.loadMethod].canPersist){
// if given string to use as persist key then use it
if (typeOf(content.persist) == 'string') content.persistKey = content.persist;
if (typeOf(content.persist) == 'array') content.persistKey = content.persist;
content.persist = true;
} else content.persist = false;
content.persistLoad = function(){
this.persistKey = this.doPrepUrl(this);
if (this.persist){
if (typeOf(this.persistKey) == 'string'){
// load the response
var content = MUI.Persist.get(this.persistKey, this.url);
if (content) return content;
}
}
return this.content;
}.bind(content);
content.persistStore = function(response){
if (!this.persist) return response;
// store the response
if (typeOf(this.persistKey) == 'string') MUI.Persist.set(this.persistKey, response, this.url);
if (typeOf(this.persistKey) == 'array'){
response = JSON.decode(response);
this.persistKey.each(function(key){
MUI.Persist.set(key, response[key], this.url);
}, this);
return null;
}
return response;
}.bind(content);
// prepare function to fire onLoaded event
content.fireLoaded = function(){
var fireEvent = true;
var instance = this.instance;
if (instance && instance.updateEnd) fireEvent = instance.updateEnd(this);
if (fireEvent){
if (this.require.js.length){
// process javascript dependencies
new MUI.Require({
js: this.require.js,
onload: function(){
if (Browser.opera) this.require.onload.delay(100);
else this.require.onload();
if (this.onLoaded && this.onLoaded != null){
this.onLoaded(element, this);
} else {
if (instance) instance.fireEvent('loaded', [element, this]);
}
}.bind(this)
});
} else {
if (this.onLoaded && this.onLoaded != null){
// call onLoaded directly
this.onLoaded(element, this);
} else {
// fire the event
if (instance) instance.fireEvent('loaded', [element, this]);
}
}
}
}.bind(content);
// now perform dependencies requests for images and style sheets
if (content.require.css.length || content.require.images.length){
new MUI.Require({
css: content.require.css,
images: content.require.images,
onload: function(){
MUI.Content.Providers[this.loadMethod].doRequest(this);
}.bind(content)
});
} else {
MUI.Content.Providers[content.loadMethod].doRequest(content);
}
return content;
},
processFilters: function(content){
if (typeof content == 'string') return content;
Object.each(content.filters, function(filter){
content.content = filter(content.content, content);
});
return content.content;
},
canPage:function(content){
return !(!content || !content.fireLoaded || !content.paging || content.paging.pageSize <= 0 || content.paging.total == 0);
},
firstPage: function(content){
if (!MUI.Content.canPage(content)) return this;
content.paging.page = 1;
if (content.instance && content.instance.updateStart) content.instance.updateStart(content);
MUI.Content.Providers[content.loadMethod].doRequest(content);
return this;
},
prevPage: function(content){
if (!MUI.Content.canPage(content)) return this;
content.paging.page--;
if (content.paging.page < 1 && content.paging.wrap) return this.lastPage(content);
if (content.paging.page < 1) content.paging.page = 1;
if (content.instance && content.instance.updateStart) content.instance.updateStart(content);
MUI.Content.Providers[content.loadMethod].doRequest(content);
return this;
},
nextPage: function(content){
if (!MUI.Content.canPage(content)) return this;
content.paging.page++;
var lastPage = Math.round(content.paging.total / content.paging.pageSize);
if (content.paging.page > lastPage && content.paging.wrap) return this.firstPage();
if (content.paging.page > lastPage) content.paging.page = lastPage;
if (content.instance && content.instance.updateStart) content.instance.updateStart(content);
MUI.Content.Providers[content.loadMethod].doRequest(content);
return this;
},
lastPage: function(content){
if (!MUI.Content.canPage(content)) return this;
content.paging.page = Math.round(content.paging.total / content.paging.pageSize);
if (content.instance && content.instance.updateStart) content.instance.updateStart(content);
MUI.Content.Providers[content.loadMethod].doRequest(content);
return this;
},
gotoPage: function(content, page){
if (!MUI.Content.canPage(content)) return this;
if (!page) page = 1;
page = parseInt('' + page);
var lastPage = parseInt(content.paging.total / content.paging.pageSize);
if (page > lastPage) page = lastPage;
if (page < 1) page = 1;
content.paging.page = page;
if (content.instance && content.instance.updateStart) content.instance.updateStart(content);
MUI.Content.Providers[content.loadMethod].doRequest(content);
return this;
},
setPageSize: function(content, max){
var paging = content.paging;
if (!MUI.Content.canPage(content)) return this;
max = parseInt('' + max);
if (max <= 0) return this;
paging.pageSize = max;
paging.page = 1;
paging.pageMax = parseInt(paging.total / paging.pageSize);
if (content.instance && content.instance.updateStart) content.instance.updateStart(content);
MUI.Content.Providers[content.loadMethod].doRequest(content);
return this;
},
setRecords: function(content){
if (!content.content) return null;
var paging = content.paging;
var records;
if (!paging || !paging.recordsField || !content.content[paging.recordsField]) records = content.content;
else records = content.content[paging.recordsField];
['total','page','pageMax','pageSize','page','last','first'].each(function(options, name){
options.paging[name] = MUI.getData(options.content, options.paging[name + 'Field'], 0);
}.bind(this, content));
delete content.content;
if (!content.fireLoaded || !paging || paging.pageSize <= 0)
return content.records = records;
if (!content.records) content.records = records;
else {
for (var i = 0,t = ((paging.page - 1) * paging.pageSize); i < records.length; i++,t++){
content.records[t] = records[i];
}
}
},
getRecords: function(content){
var records = content.records;
if (!records) return null;
var paging = content.paging;
if (!content.fireLoaded || !paging || paging.pageSize <= 0) return records;
var retval = [];
for (var i = ((paging.page - 1) * paging.pageSize),t = 0; t < paging.pageSize && i < records.length; i++,t++){
retval[t] = records[i];
}
return retval;
}
});
MUI.Content.Filters.tree = function(response, content, node){
var usePaging = node == null && content.paging && content.paging.size > 0 && content.paging.recordsField;
var data = response, i;
if (node == null) content = Object.append(content, {
fieldParentID: 'parentID',
fieldID: 'ID',
fieldNodes: 'nodes',
topID: '0'
});
if (usePaging) data = response[content.paging.recordsField];
if (node == null){
for (i = 0; i < data.length; i++){
if (data[i][content.fieldID] == content.topID){
node = data[i];
break;
}
}
}
if (node != null){
var id = node[content.fieldID];
node[content.fieldNodes] = [];
for (i = 0; i < data.length; i++){
if (data[i][content.fieldParentID] == id && data[i][content.fieldID] != id){
node[content.fieldNodes].push(data[i]);
MUI.Content.Filters.tree(data, content, data[i]);
}
}
}
if (usePaging) response[content.paging.recordsField] = node;
return node;
};
MUI.Content.Providers.xhr = {
canPersist: true,
canPage: false,
doRequest: function(content){
// if js is required, but no url, fire loaded to proceed with js-only
if (content.url == null && content.require.js && content.require.js.length != 0){
Browser.ie6 ? content.fireLoaded.delay(50, content) : content.fireLoaded();
return null;
}
// load persisted data if it exists
content.content = content.persistLoad(content);
// process content passed to options.content or persisted data
if (content.content){
content.content = MUI.Content.processFilters(content);
Browser.ie6 ? content.fireLoaded.delay(50, content) : content.fireLoaded();
return;
}
var request = new Request({
url: content.persistKey,
method: content.method ? content.method : 'get',
data: content.data ? new Hash(content.data).toQueryString() : '',
evalScripts: function(script){
content.javascript = script;
},
evalResponse: false,
onRequest: function(){
MUI.showSpinner(this.instance);
}.bind(content),
onFailure: function(response){
var content = this;
var instance = this.instance;
var getTitle = new RegExp('<title>[\n\r\\s]*(.*)[\n\r\\s]*</title>', 'gmi');
var error = getTitle.exec(response.responseText);
if (!error) error = [500, 'Unknown'];
var updateSetContent = true;
content.error = error;
content.errorMessage = '<h3>Error: ' + error[1] + '</h3>';
if (instance && instance.updateSetContent) updateSetContent = instance.updateSetContent(content);
if (this.element){
if (updateSetContent) this.element.set('html', content.errorMessage);
MUI.hideSpinner(instance);
}
}.bind(content),
onSuccess: function(text){
content = this._content;
var instance = content.instance;
text = content.persistStore(text);
text = MUI.Content.processFilters(text, content);
MUI.hideSpinner(instance);
var js = content.javascript, html = text;
// convert text files to html
if (this.getHeader('Content-Type') == 'text/plain') html = html.replace(/\n/g, '<br>');
var updateSetContent = true;
content.content = html;
if (instance && instance.updateSetContent) updateSetContent = instance.updateSetContent(content);
if (updateSetContent){
if (content.element) content.element.set('html', content.content);
var evalJS = true;
if (instance && instance.options && instance.options.evalScripts) evalJS = instance.options.evalScripts;
if (evalJS && js) Browser.exec(js);
}
Browser.ie6 ? content.fireLoaded.delay(50, content) : content.fireLoaded();
},
onComplete: function(){
}
});
request._content = content;
request.send();
}
};
MUI.Content.Providers.json = {
canPersist: true,
canPage: true,
_checkRecords: function(content){ // check to see if records already downloaded and fir onLoaded if it does
var paging = content.paging;
if (content.records && paging.pageSize == 0){
Browser.ie6 ? content.fireLoaded.delay(50, content) : content.fireLoaded();
return true; // return them all if they exists and paging is turned off
}
if (content.records && content.records.length && paging.pageSize > 0){ // if paging is on make sure we have that page
var first = ((paging.page - 1) * paging.pageSize);
var last = first + paging.pageSize - 1;
var total = content.records.length;
//if (!paging.pageMax) paging.pageMax = parseInt(paging.total / paging.pageSize);
if (total > first && total > last){
for (var i = first; i <= last; i++){
if (!content.records[i]) return false;
}
// if in scope then fire loaded to make control know we have the records
Browser.ie6 ? content.fireLoaded.delay(50, content) : content.fireLoaded();
return true
}
}
return false;
},
_onSuccess: function(json){
this.persistStore(json);
if (json != null){ // when multiple results are persisted, null is returned. decoding takes place in persistStore instead, and filtering is not allowed
if (typeof(json) == 'string') json = JSON.decode(json);
this.content = json;
MUI.Content.setRecords(this);
json = MUI.Content.processFilters(this);
}
MUI.hideSpinner(this.instance);
Browser.ie6 ? this.fireLoaded.delay(50, this) : this.fireLoaded();
},
doRequest: function(content){
if (content.content && !content.url){
Browser.ie6 ? content.fireLoaded.delay(50, this) : content.fireLoaded();
return;
}
if (!this._checkRecords(content)){
// load persisted data if it exists
content.content = JSON.decode(content.persistLoad(content));
MUI.Content.setRecords(content); // see if any records are there
} else content.persistKey = content.doPrepUrl(content);
if (!this._checkRecords(content)){
if (content.loadMethod == 'jsonp'){
new Request.JSONP({
url: content.persistKey,
callbackKey: (content.callbackKey ? content.callbackKey : 'callback'),
data: content.data ? new Hash(content.data).toQueryString() : '',
onRequest: function(){
MUI.showSpinner(this.instance);
}.bind(content),
onComplete: this._onSuccess.bind(content),
onCancel: function(){
MUI.hideSpinner(this.instance);
}.bind(content)
}).send();
} else {
// still not found so load
new Request({
url: content.persistKey,
update: content.element,
method: content.method ? content.method : 'get',
data: content.data ? new Hash(content.data).toQueryString() : '',
evalScripts: false,
evalResponse: false,
headers: {'Content-Type':'application/json'},
onRequest: function(){
MUI.showSpinner(this.instance);
}.bind(content),
onFailure: function(){
var updateSetContent = true;
this.error = [500, 'Error Loading XMLHttpRequest'];
this.errorMessage = '<p><strong>Error Loading XMLHttpRequest</strong></p>';
if (this.instance && this.instance.updateSetContent) updateSetContent = this.instance.updateSetContent(this);
if (this.element){
if (updateSetContent) this.element.set('html', this.errorMessage);
this.element.hideSpinner(this.instance);
}
}.bind(content),
onException: function(){}.bind(content),
onSuccess: this._onSuccess.bind(content),
onComplete: function(){}.bind(content)
}).send();
}
}
}
}
;
MUI.Content.Providers.jsonp = MUI.Content.Providers.json;
MUI.Content.Providers.iframe = {
canPersist: false,
canPage: false,
doRequest: function(content){
var updateSetContent = true;
var instance = content.instance;
if (instance && instance.updateSetContent) updateSetContent = instance.updateSetContent(content);
var element = content.element;
if (updateSetContent && element){
var iframeEl = new Element('iframe', {
id: element.id + '_iframe',
name: element.id + '_iframe',
'class': 'mochaIframe',
src: content.doPrepUrl(content),
marginwidth: 0,
marginheight: 0,
frameBorder: 0,
scrolling: 'auto',
styles: {
height: element.offsetHeight - element.getStyle('border-top').toInt() - element.getStyle('border-bottom').toInt(),
width: instance && instance.el.panel ? element.offsetWidth - element.getStyle('border-left').toInt() - element.getStyle('border-right').toInt() : '100%'
}
}).inject(element);
if (instance) instance.el.iframe = iframeEl;
// Add onload event to iframe so we can hide the spinner and run fireLoaded()
iframeEl.addEvent('load', function(){
MUI.hideSpinner(instance);
Browser.ie6 ? this.fireLoaded.delay(50, this) : this.fireLoaded();
}.bind(content));
}
}
};
MUI.Content.Providers.html = {
canPersist: false,
canPage: false,
doRequest: function(content){
var elementTypes = new Array('element', 'textnode', 'whitespace', 'collection');
var updateSetContent = true;
if (content.instance && content.instance.updateSetContent) updateSetContent = content.instance.updateSetContent(content);
if (updateSetContent && content.element){
if (elementTypes.contains(typeOf(content.content))) content.content.inject(content.element);
else content.element.set('html', content.content);
}
Browser.ie6 ? content.fireLoaded.delay(50, content) : content.fireLoaded();
}
};
MUI.Content.Providers.control = {
canPersist: false,
canPage: false,
doRequest: function(content){
//var options2 = content.options;
// remove unneeded items that cause recursion
// delete content.options;
delete content.instance;
MUI.create(content);
}
};
MUI.append({
WindowPanelShared: {
/// intercepts workflow from MUI.Content.update
/// sets title and scroll bars of this window
updateStart: function(options){
if (!options.position) options.position = 'content';
if (options.position == 'content'){
options.element = this.el.content;
this.addPadding(options);
// set title if given option to do so
if (options.title && this.el && this.el.title){
this.options.title = options.title;
this.el.title.set('html', options.title);
}
// Set scrollbars if loading content in main content container.
// Always use 'hidden' for iframe windows
this.el.contentWrapper.setStyles({
'overflow': this.options.scrollbars && options.loadMethod != 'iframe' ? 'auto' : 'hidden'
});
}
return false; // not used but expected
},
/// intercepts workflow from MUI.Content.update
updateClear: function(options){
if (options.position == 'content'){
this.el.content.show().empty();
var iframes = this.el.contentWrapper.getElements('.mochaIframe');
if (iframes) iframes.destroy();
// Panels are not loaded into the padding div, so we remove them separately.
this.el.contentWrapper.getElements('.column').destroy();
this.el.contentWrapper.getElements('.columnHandle').destroy();
if (this.el.content.getParent() == null) this.el.content.inject(this.el.element);
return false;
}
return true;
},
/// intercepts workflow from MUI.Content.update
updateSetContent: function(options){
if (options.position == 'content'){
if (options.loadMethod == 'html') this.el.content.addClass('pad');
if (options.loadMethod == 'iframe'){
this.el.content.removeClass('pad');
this.el.content.setStyle('padding', '0px');
this.el.content.hide();
options.element = this.el.contentWrapper;
}
}
return true; // tells MUI.Content.update to update the content
},
addPadding: function(options){
if (!options) options = Object.clone(this.options);
if (options.padding == null) options.padding = this.options.padding;
if (options.padding || options.padding == 0){
// copy padding from main options if not passed in
if (typeOf(options.padding) != 'number')
Object.append(options.padding, this.options.padding);
if (typeOf(options.padding) == 'number')
options.padding = {top: options.padding, left: options.padding, right: options.padding, bottom: options.padding};
// update padding if requested
this.el.content.setStyles({
'padding-top': options.padding.top,
'padding-bottom': options.padding.bottom,
'padding-left': options.padding.left,
'padding-right': options.padding.right
});
}
return this;
},
removePadding: function(){
this.el.content.setStyle('padding', 0);
return this;
},
empty: function(){
MUI.erase(this.el.content.getChildren());
this.el.content.empty();
return this;
},
getSection: function(section){
var retval;
this.sections.each(function(s){
if (s.section == section) retval = s;
});
return retval;
}
},
update: MUI.Content.update,
getData: function(item, property, dfault){
if (!dfault) dfault = '';
if (!item || !property) return dfault;
if (item[property] == null) return dfault;
return item[property];
}
});
MUI.Content.PagingOptions = {
// main paging options
pageSize: 0, // if >0 then paging is turned on
page: 0, // the page index offset (index*size)+1 = first record, (index*size)+size = last record
pageMax: 0, // the last page in the that (largest value of index).
// informational values, set by return results, if they are change after contents are returned, they can be used to change what the pager is displaying
total: 0, // starts out as zero until filled in when data is received
first: 1, // first record showing in current page
last: 10, // last record showing in current page
// additional options
sort: '', // fields to search by, comma separated list of fields or array of strings. Will be passed to server end-point.
dir: 'asc', // 'asc' ascending, 'desc' descending
recordsField: 'data', // 'element' in the json hash that contains the data
totalField: 'total', // 'element' in the json hash that contains the total records in the overall set
pageField: 'page', // 'element' in the json hash that contains the maximum pages that can be selected
pageMaxField: 'pageMax', // 'element' in the json hash that contains the maximum pages that can be selected
pageSizeField: 'pageSize', // 'element' in the json hash that contains the size of the page
firstField: 'first', // 'element' in the json hash that contains the size of the page
lastField: 'last', // 'element' in the json hash that contains the maximum pages that can be selected
lookAhead: 0, // # of pages to request in the background and cache
wrap: false, // true if you want paging to wrap when user hits next page and they are at the last page, or from the first to the last page
pageOptions: [10, 20, 50, 100, 200] // per page options available to user
};