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Strip trailing whitespace in LazyDataLoader

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This commit is contained in:
Dannon Baker
2014-09-17 21:17:30 -04:00
parent 577c856b8d
commit c01d4726e0
1 changed files with 22 additions and 22 deletions
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client/galaxy/scripts/utils/LazyDataLoader.js
+22 -22
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@@ -20,11 +20,11 @@ TODO:
* + '&columns=[10,14]' ),
* total : hda.metadata_data_lines,
* size : 500,
*
*
* initialize : function( config ){
* // ... do some stuff
* },
*
*
* buildUrl : function( start, size ){
* // change the formation of start, size in query string
* return loader.url + '&' + jQuery.param({
@@ -64,19 +64,19 @@ function LazyDataLoader( config ){
LOADED_ALL_EVENT = 'complete';
// error from ajax
ERROR_EVENT = 'error';
jQuery.extend( loader, LoggableMixin );
jQuery.extend( loader, {
//NOTE: the next two need to be sent in config (required)
// total size of data on server
total : undefined,
// url of service to get the data
url : undefined,
// holds the interval id for the current load delay
currentIntervalId : undefined,
// each load call will add an element to this array
// it's the responsibility of the code using this to combine them properly
data : [],
@@ -86,12 +86,12 @@ function LazyDataLoader( config ){
start : 0,
// size to fetch per load
size : 4000,
// loader init func: extends loader with config and calls config.init if there
//@param {object} config : object containing variables to override (or additional)
initialize : function( config ){
jQuery.extend( loader, config );
// call the custom initialize function if any
// only dangerous if the user tries LazyDataLoader.prototype.init
if( config.hasOwnProperty( 'initialize' ) ){
@@ -99,7 +99,7 @@ function LazyDataLoader( config ){
}
this.log( this + ' initialized:', loader );
},
// returns query string formatted start and size (for the next fetch) appended to the loader.url
//OVERRIDE: to change how params are passed, param names, etc.
//@param {int} start : the line/row/datum indicating where in the dataset the next load begins
@@ -111,7 +111,7 @@ function LazyDataLoader( config ){
max_vals: size
});
},
//OVERRIDE: to handle ajax errors differently
ajaxErrorFn : function( xhr, status, error ){
console.error( 'ERROR fetching data:', error );
@@ -127,7 +127,7 @@ function LazyDataLoader( config ){
},
// interface to begin load (and first recursive call)
//@param {Function} callback : function to execute when all data is loaded. callback is passed loader.data
//@param {Function} callback : function to execute when all data is loaded. callback is passed loader.data
load : function( callback ){
this.log( this + '.load' );
@@ -140,7 +140,7 @@ function LazyDataLoader( config ){
this.log( '\t total:', this.total );
}
//if( !loader.total ){ throw( loader + ' requires a total (total size of the data)' ); }
//FIRST RECURSION: start
var startingSize = loader.size;
if( ( loader.total !== null ) && ( loader.total < loader.size ) ){
@@ -148,13 +148,13 @@ function LazyDataLoader( config ){
}
loader.log( loader + '\t beginning recursion' );
loadHelper( loader.start, startingSize );
//FIRST, SUBSEQUENT RECURSION function
function loadHelper( start, size ){
loader.log( loader + '.loadHelper, start:', start, 'size:', size );
var url = loader.buildUrl( start, size );
loader.log( '\t url:', url );
jQuery.ajax({
url : loader.buildUrl( start, size ),
converters : loader.converters,
@@ -168,19 +168,19 @@ function LazyDataLoader( config ){
$( loader ).trigger( ERROR_EVENT, [ status, error ] );
loader.ajaxErrorFn( xhr, status, error );
},
success : function( response ){
loader.log( '\t ajax success, response:', response, 'next:', next, 'remainder:', remainder );
if( response !== null ){
// store the response as is in a new element
//TODO:?? store start, size as well?
loader.data.push( response );
//TODO: these might not be the best way to split this up
// fire the first load event (if this is the first batch) AND partial
$( loader ).trigger( LOADED_NEW_EVENT, [ response, start, size ] );
//RECURSION:
var next = start + size,
remainder = loader.size;
@@ -197,12 +197,12 @@ function LazyDataLoader( config ){
loader.delay
);
loader.log( '\t currentIntervalId:', loader.currentIntervalId );
// otherwise (base-case), don't do anything
} else {
loadFinished();
}
} else { //response === null --> base-case, server sez nuthin left
loadFinished();
}
@@ -217,10 +217,10 @@ function LazyDataLoader( config ){
if( callback ){ callback( loader.data ); }
}
},
toString : function(){ return 'LazyDataLoader'; }
});
loader.initialize( config );
return loader;
}