157 lines
4.4 KiB
JavaScript
157 lines
4.4 KiB
JavaScript
/*! http://mths.be/placeholder v2.0.7 by @mathias */
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;(function(window, document, $) {
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var isInputSupported = 'placeholder' in document.createElement('input'),
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isTextareaSupported = 'placeholder' in document.createElement('textarea'),
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prototype = $.fn,
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valHooks = $.valHooks,
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hooks,
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placeholder;
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if (isInputSupported && isTextareaSupported) {
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placeholder = prototype.placeholder = function() {
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return this;
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};
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placeholder.input = placeholder.textarea = true;
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} else {
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placeholder = prototype.placeholder = function() {
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var $this = this;
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$this
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.filter((isInputSupported ? 'textarea' : ':input') + '[placeholder]')
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.not('.placeholder')
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.bind({
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'focus.placeholder': clearPlaceholder,
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'blur.placeholder': setPlaceholder
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})
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.data('placeholder-enabled', true)
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.trigger('blur.placeholder');
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return $this;
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};
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placeholder.input = isInputSupported;
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placeholder.textarea = isTextareaSupported;
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hooks = {
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'get': function(element) {
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var $element = $(element);
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return $element.data('placeholder-enabled') && $element.hasClass('placeholder') ? '' : element.value;
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},
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'set': function(element, value) {
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var $element = $(element);
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if (!$element.data('placeholder-enabled')) {
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return element.value = value;
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}
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if (value == '') {
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element.value = value;
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// Issue #56: Setting the placeholder causes problems if the element continues to have focus.
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if (element != document.activeElement) {
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// We can’t use `triggerHandler` here because of dummy text/password inputs :(
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setPlaceholder.call(element);
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}
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} else if ($element.hasClass('placeholder')) {
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clearPlaceholder.call(element, true, value) || (element.value = value);
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} else {
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element.value = value;
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}
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// `set` can not return `undefined`; see http://jsapi.info/jquery/1.7.1/val#L2363
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return $element;
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}
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};
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isInputSupported || (valHooks.input = hooks);
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isTextareaSupported || (valHooks.textarea = hooks);
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$(function() {
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// Look for forms
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$(document).delegate('form', 'submit.placeholder', function() {
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// Clear the placeholder values so they don’t get submitted
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var $inputs = $('.placeholder', this).each(clearPlaceholder);
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setTimeout(function() {
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$inputs.each(setPlaceholder);
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}, 10);
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});
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});
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// Clear placeholder values upon page reload
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$(window).bind('beforeunload.placeholder', function() {
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$('.placeholder').each(function() {
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this.value = '';
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});
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});
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}
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function args(elem) {
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// Return an object of element attributes
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var newAttrs = {},
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rinlinejQuery = /^jQuery\d+$/;
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$.each(elem.attributes, function(i, attr) {
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if (attr.specified && !rinlinejQuery.test(attr.name)) {
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newAttrs[attr.name] = attr.value;
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}
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});
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return newAttrs;
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}
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function clearPlaceholder(event, value) {
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var input = this,
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$input = $(input);
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if (input.value == $input.attr('placeholder') && $input.hasClass('placeholder')) {
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if ($input.data('placeholder-password')) {
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$input = $input.hide().next().show().attr('id', $input.removeAttr('id').data('placeholder-id'));
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// If `clearPlaceholder` was called from `$.valHooks.input.set`
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if (event === true) {
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return $input[0].value = value;
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}
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$input.focus();
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} else {
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input.value = '';
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$input.removeClass('placeholder');
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input == document.activeElement && input.select();
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}
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}
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}
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function setPlaceholder() {
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var $replacement,
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input = this,
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$input = $(input),
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$origInput = $input,
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id = this.id;
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if (input.value == '') {
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if (input.type == 'password') {
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if (!$input.data('placeholder-textinput')) {
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try {
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$replacement = $input.clone().attr({ 'type': 'text' });
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} catch(e) {
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$replacement = $('<input>').attr($.extend(args(this), { 'type': 'text' }));
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}
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$replacement
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.removeAttr('name')
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.data({
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'placeholder-password': true,
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'placeholder-id': id
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})
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.bind('focus.placeholder', clearPlaceholder);
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$input
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.data({
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'placeholder-textinput': $replacement,
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'placeholder-id': id
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})
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.before($replacement);
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}
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$input = $input.removeAttr('id').hide().prev().attr('id', id).show();
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// Note: `$input[0] != input` now!
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}
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$input.addClass('placeholder');
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$input[0].value = $input.attr('placeholder');
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} else {
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$input.removeClass('placeholder');
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}
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}
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}(this, document, jQuery)); |