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/* ************************************************************************
qooxdoo - the new era of web development
http://qooxdoo.org
Copyright:
2004-2007 1&1 Internet AG, Germany, http://www.1and1.org
License:
LGPL: http://www.gnu.org/licenses/lgpl.html
EPL: http://www.eclipse.org/org/documents/epl-v10.php
See the LICENSE file in the project's top-level directory for details.
Authors:
* Sebastian Werner (wpbasti)
* Andreas Ecker (ecker)
************************************************************************ */
/* ************************************************************************
#module(core)
************************************************************************ */
/**
* Helper functions for arrays.
*
* The native JavaScript Array is not modified by this class. However,
* there are modifications to the native Array in {@link qx.lang.Core} for
* browsers that do not support certain JavaScript 1.6 features natively .
*
* The additions implemented here may be added directly to native Array by
* a setting in {@link qx.lang.Prototypes}. This feature is not enabled by
* default.
*
* The string/array generics introduced in JavaScript 1.6 are supported by
* {@link qx.lang.Generics}.
*/
qx.OO.defineClass("qx.lang.Array");
/**
* Convert an arguments object into an array
*
* @param args {arguments} arguments object
* @return {Array}
*/
qx.lang.Array.fromArguments = function(args) {
return Array.prototype.slice.call(args, 0);
};
/**
* Expand shorthand definition to a four element list.
* This is an utility function for padding/margin and all other shorthand handling.
*
* @param input {Array} array with one to four elements
* @return {Array} array with four elements
*/
qx.lang.Array.fromShortHand = function(input)
{
var len = input.length;
if (len > 4 || len == 0) {
this.error("Invalid number of arguments!");
}
var result = qx.lang.Array.copy(input);
// Copy Values (according to the length)
switch(len)
{
case 1:
result[1] = result[2] = result[3] = result[0];
break;
case 2:
result[2] = result[0];
// no break here
case 3:
result[3] = result[1];
}
// Return list with 4 items
return result;
};
/**
* Return a copy of the given array
*
* @param arr {Array} the array to copy
* @return {Array} copy of the array
*/
qx.lang.Array.copy = function(arr) {
return arr.concat();
};
/**
* Return a copy of the given array
* The same as {@link qx.lang.Array.copy}
*
* @param arr {Array} the array to copy
* @return {Array} copy of the array
*/
qx.lang.Array.clone = function(arr) {
return arr.concat();
};
/**
* Return the last element of an array
*
* @param arr {Array} the array
* @return {var} the last element of the array
*/
qx.lang.Array.getLast = function(arr) {
return arr[arr.length-1];
};
/**
* Return the first element of an array
*
* @param arr {Array} the array
* @return {var} the first element of the array
*/
qx.lang.Array.getFirst = function(arr) {
return arr[0];
};
/**
* Insert an element at a given position into the array
*
* @param arr {Array} the array
* @param obj {var} the element to insert
* @param i {Integer} position where to insert the element into the array
* @return {Array} the array
*/
qx.lang.Array.insertAt = function(arr, obj, i)
{
arr.splice(i, 0, obj);
return arr;
};
/**
* Insert an element into the array before a given second element
*
* @param arr {Array} the array
* @param obj {var} object to be inserted
* @param obj2 {var} insert obj1 before this object
* @return {Array} the array
*/
qx.lang.Array.insertBefore = function(arr, obj, obj2)
{
var i = arr.indexOf(obj2);
if (i == -1)
{
arr.push(obj);
}
else
{
arr.splice(i, 0, obj);
}
return arr;
};
/**
* Insert an element into the array after a given second element
*
* @param arr {Array} the array
* @param obj {var} object to be inserted
* @param obj2 {var} insert obj1 after this object
* @return {Array} the array
*/
qx.lang.Array.insertAfter = function(arr, obj, obj2)
{
var i = arr.indexOf(obj2);
if (i == -1 || i == (arr.length-1))
{
arr.push(obj);
}
else
{
arr.splice(i+1, 0, obj);
}
return arr;
};
/**
* Remove an element from the array at the given index
*
* @param arr {Array} the array
* @param i {Integer} index of the element to be removed
* @return {Array} the array with the element removed
*/
qx.lang.Array.removeAt = function(arr, i) {
return arr.splice(i, 1);
};
/**
* Remmove all elements from the array
*
* @param arr {Array} the array
* @return {Array} empty array
*/
qx.lang.Array.removeAll = function(arr) {
return arr.splice(0, arr.length);
};
/**
* Append the elements of an array to the array
*
* @param arr {Array} the array
* @param a {Array} the elements of this array will be appended to the array
*/
qx.lang.Array.append = function(arr, a) {
Array.prototype.push.apply(arr, a);
};
/**
* Remove an element from the array
*
* @param arr {Array} the array
* @param obj {var} element to be removed from the array
* @return {Array} array with the element removed
*/
qx.lang.Array.remove = function(arr, obj)
{
var i = arr.indexOf(obj);
if (i != -1) {
return arr.splice(i, 1);
}
};
/**
* Whether the array contains the given element
*
* @param arr {Array} the array
* @param obj {var} object to look for
* @return {Boolean} whether the array contains the element
*/
qx.lang.Array.contains = function(arr, obj) {
return arr.indexOf(obj) != -1;
};
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