WordPress/wp-admin/js/custom-background.js

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var farbtastic, pickColor;
(function($) {
var defaultColor = '';
pickColor = function(color) {
farbtastic.setColor(color);
$('#background-color').val(color);
$('#custom-background-image').css('background-color', color);
// If we have a default color, and they match, then we need to hide the 'Default' link.
// Otherwise, we hide the 'Clear' link when it is empty.
if ( ( defaultColor && color === defaultColor ) || ( ! defaultColor && ( '' === color || '#' === color ) ) )
$('#clearcolor').hide();
else
$('#clearcolor').show();
}
$(document).ready(function() {
defaultColor = $('#defaultcolor').val();
$('#pickcolor').click(function() {
$('#colorPickerDiv').show();
return false;
});
$('#clearcolor a').click( function(e) {
pickColor( defaultColor );
e.preventDefault();
});
$('#background-color').keyup(function() {
var _hex = $('#background-color').val(), hex = _hex;
if ( hex.charAt(0) != '#' )
hex = '#' + hex;
hex = hex.replace(/[^#a-fA-F0-9]+/, '');
if ( hex != _hex )
$('#background-color').val(hex);
if ( hex.length == 4 || hex.length == 7 )
pickColor( hex );
});
$('input[name="background-position-x"]').change(function() {
$('#custom-background-image').css('background-position', $(this).val() + ' top');
});
$('input[name="background-repeat"]').change(function() {
$('#custom-background-image').css('background-repeat', $(this).val());
});
farbtastic = $.farbtastic('#colorPickerDiv', function(color) {
pickColor(color);
});
pickColor($('#background-color').val());
$(document).mousedown(function(){
$('#colorPickerDiv').each(function(){
var display = $(this).css('display');
if ( display == 'block' )
$(this).fadeOut(2);
});
});
});
})(jQuery);