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/*!
* HTML5 placeholder emulation for jQuery plugin
*
* This will automatically use the HTML5 placeholder attribute if supported, or emulate this behavior if not.
*
* This is a fork from Mathias Bynens' jquery.placeholder as of this commit
* https://github.com/mathiasbynens/jquery-placeholder/blob/47f05d400e2dd16b59d144141a2cf54a9a77c502/jquery.placeholder.js
*
* @author Mathias Bynens <http://mathiasbynens.be/>
* @author Trevor Parscal <tparscal@wikimedia.org>, 2012
* @author Krinkle <krinklemail@gmail.com>, 2012
* @author Alex Ivanov <alexivanov97@gmail.com>, 2013
* @version 2.1.0
* @license MIT
*/
( function ( $ ) {
var isInputSupported = 'placeholder' in document.createElement( 'input' ),
isTextareaSupported = 'placeholder' in document.createElement( 'textarea' ),
prototype = $.fn,
valHooks = $.valHooks,
propHooks = $.propHooks,
hooks,
placeholder;
function safeActiveElement() {
// Avoid IE9 `document.activeElement` of death
// https://github.com/mathiasbynens/jquery-placeholder/pull/99
try {
return document.activeElement;
} catch ( err ) {}
}
function args( elem ) {
// Return an object of element attributes
var newAttrs = {},
rinlinejQuery = /^jQuery\d+$/;
$.each( elem.attributes, function ( i, attr ) {
if ( attr.specified && !rinlinejQuery.test( attr.name ) ) {
newAttrs[ attr.name ] = attr.value;
}
} );
return newAttrs;
}
function clearPlaceholder( event, value ) {
var input = this,
$input = $( input );
if ( input.value === $input.attr( 'placeholder' ) && $input.hasClass( 'placeholder' ) ) {
if ( $input.data( 'placeholder-password' ) ) {
$input = $input.hide().next().show().attr( 'id', $input.removeAttr( 'id' ).data( 'placeholder-id' ) );
// If `clearPlaceholder` was called from `$.valHooks.input.set`
if ( event === true ) {
$input[ 0 ].value = value;
return value;
}
$input.focus();
} else {
input.value = '';
$input.removeClass( 'placeholder' );
if ( input === safeActiveElement() ) {
input.select();
}
}
}
}
function setPlaceholder() {
var $replacement,
input = this,
$input = $( input ),
id = this.id;
if ( !input.value ) {
if ( input.type === 'password' ) {
if ( !$input.data( 'placeholder-textinput' ) ) {
try {
$replacement = $input.clone().attr( { type: 'text' } );
} catch ( e ) {
$replacement = $( '<input>' ).attr( $.extend( args( this ), { type: 'text' } ) );
}
$replacement
.removeAttr( 'name' )
.data( {
'placeholder-password': $input,
'placeholder-id': id
} )
.bind( 'focus.placeholder drop.placeholder', clearPlaceholder );
$input
.data( {
'placeholder-textinput': $replacement,
'placeholder-id': id
} )
.before( $replacement );
}
$input = $input.removeAttr( 'id' ).hide().prev().attr( 'id', id ).show();
// Note: `$input[0] != input` now!
}
$input.addClass( 'placeholder' );
$input[ 0 ].value = $input.attr( 'placeholder' );
} else {
$input.removeClass( 'placeholder' );
}
}
function changePlaceholder( text ) {
var hasArgs = arguments.length,
$input = this;
if ( hasArgs ) {
if ( $input.attr( 'placeholder' ) !== text ) {
$input.prop( 'placeholder', text );
if ( $input.hasClass( 'placeholder' ) ) {
$input[ 0 ].value = text;
}
}
}
}
if ( isInputSupported && isTextareaSupported ) {
placeholder = prototype.placeholder = function ( text ) {
var hasArgs = arguments.length;
if ( hasArgs ) {
changePlaceholder.call( this, text );
}
return this;
};
placeholder.input = placeholder.textarea = true;
} else {
placeholder = prototype.placeholder = function ( text ) {
var $this = this,
hasArgs = arguments.length;
if ( hasArgs ) {
changePlaceholder.call( this, text );
}
$this
.filter( ( isInputSupported ? 'textarea' : ':input' ) + '[placeholder]' )
.filter( function () {
return !$( this ).data( 'placeholder-enabled' );
} )
.bind( {
'focus.placeholder drop.placeholder': clearPlaceholder,
'blur.placeholder': setPlaceholder
} )
.data( 'placeholder-enabled', true )
.trigger( 'blur.placeholder' );
return $this;
};
placeholder.input = isInputSupported;
placeholder.textarea = isTextareaSupported;
hooks = {
get: function ( element ) {
var $element = $( element ),
$passwordInput = $element.data( 'placeholder-password' );
if ( $passwordInput ) {
return $passwordInput[ 0 ].value;
}
return $element.data( 'placeholder-enabled' ) && $element.hasClass( 'placeholder' ) ? '' : element.value;
},
set: function ( element, value ) {
var $element = $( element ),
$passwordInput = $element.data( 'placeholder-password' );
if ( $passwordInput ) {
$passwordInput[ 0 ].value = value;
return value;
}
if ( !$element.data( 'placeholder-enabled' ) ) {
element.value = value;
return value;
}
if ( !value ) {
element.value = value;
// Issue #56: Setting the placeholder causes problems if the element continues to have focus.
if ( element !== safeActiveElement() ) {
// We can't use `triggerHandler` here because of dummy text/password inputs :(
setPlaceholder.call( element );
}
} else if ( $element.hasClass( 'placeholder' ) ) {
if ( !clearPlaceholder.call( element, true, value ) ) {
element.value = value;
}
} else {
element.value = value;
}
// `set` can not return `undefined`; see http://jsapi.info/jquery/1.7.1/val#L2363
return $element;
}
};
if ( !isInputSupported ) {
valHooks.input = hooks;
propHooks.value = hooks;
}
if ( !isTextareaSupported ) {
valHooks.textarea = hooks;
propHooks.value = hooks;
}
$( function () {
// Look for forms
$( document ).delegate( 'form', 'submit.placeholder', function () {
// Clear the placeholder values so they don't get submitted
var $inputs = $( '.placeholder', this ).each( clearPlaceholder );
setTimeout( function () {
$inputs.each( setPlaceholder );
}, 10 );
} );
} );
// Clear placeholder values upon page reload
$( window ).bind( 'beforeunload.placeholder', function () {
$( '.placeholder' ).each( function () {
this.value = '';
} );
} );
}
}( jQuery ) );
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