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/*
* JavaScript backwards-compatibility alternatives and other convenience functions
*/
jQuery.extend({
trimLeft : function( str ) {
return str === null ? '' : str.toString().replace( /^\s+/, '' );
},
trimRight : function( str ) {
return str === null ?
'' : str.toString().replace( /\s+$/, '' );
},
ucFirst : function( str ) {
return str.substr( 0, 1 ).toUpperCase() + str.substr( 1 );
},
escapeRE : function( str ) {
return str.replace ( /([\\{}()|.?*+\-^$\[\]])/g, "\\$1" );
},
isDomElement : function( el ) {
return !!el && !!el.nodeType;
},
isEmpty : function( v ) {
var key;
if ( v === "" || v === 0 || v === "0" || v === null
|| v === false || typeof v === 'undefined' )
{
return true;
}
// the for-loop could potentially contain prototypes
// to avoid that we check it's length first
if ( v.length === 0 ) {
return true;
}
if ( typeof v === 'object' ) {
for ( key in v ) {
return false;
}
return true;
}
return false;
},
compareArray : function( arrThis, arrAgainst ) {
if ( arrThis.length != arrAgainst.length ) {
return false;
}
for ( var i = 0; i < arrThis.length; i++ ) {
if ( arrThis[i] instanceof Array ) {
if ( !$.compareArray( arrThis[i], arrAgainst[i] ) ) {
return false;
}
} else if ( arrThis[i] !== arrAgainst[i] ) {
return false;
}
}
return true;
},
compareObject : function( objectA, objectB ) {
// Do a simple check if the types match
if ( typeof objectA == typeof objectB ) {
// Only loop over the contents if it really is an object
if ( typeof objectA == 'object' ) {
// If they are aliases of the same object (ie. mw and mediaWiki) return now
if ( objectA === objectB ) {
return true;
} else {
var prop;
// Iterate over each property
for ( prop in objectA ) {
// Check if this property is also present in the other object
if ( prop in objectB ) {
// Compare the types of the properties
var type = typeof objectA[prop];
if ( type == typeof objectB[prop] ) {
// Recursively check objects inside this one
switch ( type ) {
case 'object' :
if ( !$.compareObject( objectA[prop], objectB[prop] ) ) {
return false;
}
break;
case 'function' :
// Functions need to be strings to compare them properly
if ( objectA[prop].toString() !== objectB[prop].toString() ) {
return false;
}
break;
default:
// Strings, numbers
if ( objectA[prop] !== objectB[prop] ) {
return false;
}
break;
}
} else {
return false;
}
} else {
return false;
}
}
// Check for properties in B but not in A
// This is about 15% faster (tested in Safari 5 and Firefox 3.6)
// ...than incrementing a count variable in the above and below loops
// See also: http://www.mediawiki.org/wiki/ResourceLoader/Default_modules/compareObject_test#Results
for ( prop in objectB ) {
if ( !( prop in objectA ) ) {
return false;
}
}
}
}
} else {
return false;
}
return true;
}
});
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