/ext3/docs/source/error-checking.html
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Possible License(s): GPL-3.0, BSD-3-Clause, LGPL-2.0, LGPL-2.1, LGPL-3.0
- <html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
- <title>The source code</title>
- <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
- <script type="text/javascript" src="../resources/prettify/prettify.js"></script>
- </head>
- <body onload="prettyPrint();">
- <pre class="prettyprint lang-js">/*!
- * Ext JS Library 3.3.0
- * Copyright(c) 2006-2010 Ext JS, Inc.
- * licensing@extjs.com
- * http://www.extjs.com/license
- */
- Ext.ns('Ext.debug');
- Ext.debug.Assistant = function(){
- var enabled = true;
-
- return {
- enable: function(){
- enabled = true;
- },
-
- disable: function(){
- enabled = false;
- },
-
- init : function(classes){
- var klass,
- intercept = false,
- fn,
- method;
- Ext.each(classes, function(cls){
- if(this.namespaceExists(cls.name)){
- klass = this.getClass(cls.name);
- method = cls.instance ? this.addInstanceCheck : this.addPrototypeCheck;
- Ext.each(cls.checks, function(check){
- intercept = check.intercept == true;
- fn = method.call(this, klass, check.name, check.fn, check.intercept == true);
- if(check.after){
- check.after(fn);
- }
- }, this);
- }
- }, this);
- },
-
- namespaceExists: function(name){
- var parent = window,
- exists = true;
-
- Ext.each(name.split('.'), function(n){
- if(!Ext.isDefined(parent[n])){
- exists = false;
- return false;
- }
- parent = parent[n];
- });
- return exists;
- },
-
- getClass : function(name){
- var parent = window;
- Ext.each(name.split('.'), function(n){
- parent = parent[n];
- });
- return parent;
- },
-
- warn: function(){
- if(enabled && window.console){
- console.warn.apply(console, arguments);
- }
- },
-
- error: function(){
- if(enabled && window.console){
- console.error.apply(console, arguments);
- }
- },
-
- addPrototypeCheck : function(cls, method, fn, intercept){
- return (cls.prototype[method] = cls.prototype[method][intercept ? 'createInterceptor' : 'createSequence'](fn));
- },
-
- addInstanceCheck : function(cls, method, fn, intercept){
- return (cls[method] = cls[method][intercept ? 'createInterceptor' : 'createSequence'](fn));
- }
- };
- }();
-
- (function(){
- var A = Ext.debug.Assistant,
- cls = [];
-
- cls.push({
- name: 'Ext.util.Observable',
- checks: [{
- name: 'addListener',
- intercept: true,
- fn: function(eventName, fn){
- if(typeof eventName == 'object'){
- var ev, o;
- for(ev in eventName){
- if(!this.filterOptRe.test(ev)){
- o = eventName[ev];
- o = o && o.fn ? o.fn : o;
- if(!Ext.isFunction(o)){
- A.error('Non function passed to event listener', this, ev);
- return false;
- }
- }
- }
- }else{
- if(!Ext.isFunction(fn)){
- A.error('Non function passed to event listener', this, eventName);
- }
- }
- },
- after: function(method){
- Ext.util.Observable.prototype.on = method;
- }
- }]
- });
-
- cls.push({
- name: 'Ext.Component',
- checks: [{
- name: 'render',
- intercept: true,
- fn: function(container, position){
- if(!container && !this.el){
- A.error('Unable to render to container', this, container);
- }
-
- if(this.contentEl){
- var el = Ext.getDom(this.contentEl);
- if(!el){
- A.error('Specified contentEl does not exist', this, this.contentEl);
- return false;
- }
- }
- }
- }]
- });
-
- cls.push({
- name: 'Ext.Container',
- checks: [{
- name: 'onBeforeAdd',
- intercept: true,
- fn: function(c){
- if(c.isDestroyed){
- A.warn('Adding destroyed component to container', c, this);
- }
- if(c.renderTo){
- A.warn('Using renderTo while adding an item to a Container. You should use the add() method or put the item in the items configuration', c, this);
- }
- if(c.applyTo){
- A.warn('Using applyTo while adding an item to a Container. You should use the add() method or put the item in the items configuration', c, this);
- }
-
- var type = this.layout.type;
- if(type == 'container' || type == 'auto'){
- A.warn('A non sizing layout is being used in a container that has child components. This means the child components will not be sized.', this);
- }
- }
- },{
- name: 'lookupComponent',
- intercept: true,
- fn: function(c){
- var valid = true;
- if(Ext.isEmpty(c)){
- valid = false;
- }
- if(Ext.isString(c)){
- c = Ext.ComponentMgr.get(comp);
- valid = !Ext.isEmpty(c);
- }
- if(!valid){
- A.error('Adding invalid component to container', this, c);
- return false;
- }
- }
- }]
- });
-
- cls.push({
- name: 'Ext.DataView',
- checks: [{
- name: 'initComponent',
- fn: function(){
- if(!this.itemSelector){
- A.error('No itemSelector specified', this);
- }
- }
- },{
- name: 'afterRender',
- fn: function(){
- if(!this.store){
- A.error('No store attached to DataView', this);
- }
- }
- }]
- });
-
- cls.push({
- name: 'Ext.Window',
- checks: [{
- name: 'show',
- intercept: true,
- fn: function(){
- if(this.isDestroyed){
- A.error('Trying to show a destroyed window. If you want to reuse the window, look at the closeAction configuration.', this);
- return false;
- }
- }
- }]
- });
-
- cls.push({
- name: 'Ext.grid.GridPanel',
- checks: [{
- name: 'initComponent',
- fn: function(){
- if(!this.colModel){
- A.error('No column model specified for grid', this);
- }
- if(!this.store){
- A.error('No store specified for grid', this);
- }
- }
- }]
- });
-
- cls.push({
- name: 'Ext.grid.GridView',
- checks: [{
- name: 'autoExpand',
- intercept: true,
- fn: function(){
- var g = this.grid,
- cm = this.cm;
- if(!this.userResized && g.autoExpandColumn){
- var tw = cm.getTotalWidth(false),
- aw = this.grid.getGridEl().getWidth(true) - this.getScrollOffset();
- if(tw != aw){
- var ci = cm.getIndexById(g.autoExpandColumn);
- if(ci == -1){
- A.error('The autoExpandColumn does not exist in the column model', g, g.autoExpandColumn);
- return false;
- }
- }
- }
- }
- }]
- });
-
- cls.push({
- name: 'Ext.chart.Chart',
- checks: [{
- name: 'initComponent',
- fn: function(){
- if(!this.store){
- A.error('No store specified for chart', this);
- }
- }
- }]
- });
-
- cls.push({
- name: 'Ext.tree.TreePanel',
- checks: [{
- name: 'afterRender',
- intercept: true,
- fn: function(){
- if(!this.root){
- A.error('No root node specified for tree', this);
- return false;
- }
- }
- }]
- });
-
- cls.push({
- name: 'Ext',
- instance: true,
- checks: [{
- name: 'extend',
- intercept: true,
- fn: function(){
- if(arguments.length == 2 && !arguments[0]){
- A.error('Invalid base class passed to extend', arguments[0]);
- return false;
- }
- if(arguments.length == 3){
- if(!arguments[0]){
- A.error('Invalid class to extend', arguments[0]);
- return false;
- }else if(!arguments[1]){
- A.error('Invalid base class passed to extend', arguments[1]);
- return false;
- }
- }
- }
- },{
- name: 'override',
- intercept: true,
- fn: function(c){
- if(!c){
- A.error('Invalid class passed to override', c);
- return false;
- }
- }
- }]
- });
-
- cls.push({
- name: 'Ext.ComponentMgr',
- instance: true,
- checks: [{
- name: 'register',
- intercept: true,
- fn: function(c){
- if(this.all.indexOfKey(c.id) > -1){
- A.warn('A component with this id already exists', c, c.id);
- }
- }
- },{
- name: 'create',
- intercept: true,
- fn: function(config, defaultType){
- var types = Ext.ComponentMgr.types;
- if(!config.render){
- if(config.xtype){
- if(!types[config.xtype]){
- A.error('Unknown xtype specified', config, config.xtype);
- return false;
- }
- }else{
- if(!types[defaultType]){
- A.error('Unknown defaultType specified', config, defaultType);
- return false;
- }
- }
- }
- }
- }]
- });
-
- cls.push({
- name: 'Ext.layout.FitLayout',
- checks: [{
- name: 'onLayout',
- intercept: true,
- fn: function(){
- var ct = this.container;
- if(ct.items.getCount() > 1){
- A.warn('More than 1 item in the container. A fit layout will only display a single item.', ct);
- }
- }
- }]
- });
-
- if(Ext.BLANK_IMAGE_URL == 'http:/' + '/www.extjs.com/s.gif'){
- A.warn('You should set the Ext.BLANK_IMAGE_URL to reference a local copy.');
- }
-
- A.init(cls);
-
-
- })();</pre>
- </body>
- </html>