+++ /dev/null
-/**
- * @license In-Field Label jQuery Plugin
- * http://fuelyourcoding.com/scripts/infield.html
- * http://github.com/streetpc/jquery-infieldlabels
- *
- * Copyright (c) 2009 Doug Neiner, Adrien Lavoillotte
- * Dual licensed under the MIT and GPL licenses, see:
- * http://docs.jquery.com/License
- *
- * @version 0.2.1
- */
-(function ($) {
-
- // private constants
- // - states
- var BLUR = 0, // field is empty & unfocused
- FOCUS = 1, // field is empty & focused
- NOT_EMPTY = 2, // field is not empty
- // - accepted input type
- INPUT_TYPE = /^(?:text|password|search|number|tel|url|email|date(?:time(?:-local)?)?|time|month|week)?$/,
- // - state transitions
- T = function(from, to) { return (from << 3) | to; },
- TRANSITIONS = {};
-
- // init transitions
- TRANSITIONS[T( FOCUS, BLUR )] = function(base) { base.fadeTo(1.0); };
- TRANSITIONS[T( NOT_EMPTY, BLUR )] = function(base) { base.$label.css({opacity: 1.0}).show(); base.emptied(true); };
- TRANSITIONS[T( BLUR, FOCUS )] = function(base) { base.fadeTo(base.options.fadeOpacity); };
- TRANSITIONS[T( NOT_EMPTY, FOCUS )] = function(base) { base.$label.css({opacity: base.options.fadeOpacity}).show(); base.emptied(true); };
- TRANSITIONS[T( BLUR, NOT_EMPTY )] = function(base) { base.$label.hide(); base.emptied(false); };
- TRANSITIONS[T( FOCUS, NOT_EMPTY )] = TRANSITIONS[T( BLUR, NOT_EMPTY )];
-
- $.InFieldLabels = function (label, field, options) {
- // To avoid scope issues, use 'base' instead of 'this'
- // to reference this class from internal events and functions.
- var base = this;
-
- // Access to jQuery and DOM versions of each element
- base.$label = $(label);
- base.label = label;
-
- base.$field = $(field);
- base.field = field;
-
- base.$label.data('InFieldLabels', base);
- base.state = BLUR;
-
- base.init = function () {
- // Merge supplied options with default options
- base.options = $.extend({}, $.InFieldLabels.defaultOptions, options);
-
- if (base.options.labelClass) {
- base.$label.addClass(base.options.labelClass);
- }
- if (base.options.disableAutocomplete) {
- base.$field.attr('autocomplete', 'off');
- }
-
- base.$field
- .bind('blur focus change keyup.infield cut', base.updateState)
- // paste cannot be empty
- .bind('paste', function(e){ base.setState(NOT_EMPTY); });
-
- base.updateState();
- };
-
- base.emptied = function(empty) {
- if (!base.options.emptyWatch) {
- if (empty) {
- // namespace ensures we unbind only our handler
- base.$field.bind('keyup.infield', base.updateState);
- } else {
- // save CPU but won't detect empty until blur
- base.$field.unbind('keyup.infield', base.updateState);
- }
- }
- };
-
- base.fadeTo = function (opacity) {
- if (!base.options.fadeDuration) {
- base.$label.css({ opacity: opacity });
- } else {
- base.$label.stop().animate({ opacity: opacity }, base.options.fadeDuration);
- }
- };
-
- base.updateState = function (e, nl) {
- var state = NOT_EMPTY;
- if (base.field.value === '') {
- var focus = e && e.type;
- if (focus === 'focus' || focus === 'keyup') {
- focus = true;
- } else if (focus === 'blur' || focus === 'change') {
- focus = false;
- } else { // last resort because slowest
- focus = base.$field.is(':focus');
- }
- state = focus ? FOCUS : BLUR;
- }
- base.setState(state, nl);
- };
-
- base.setState = function (state, nl) {
- if (state === base.state) {
- return;
- }
-
- var transition = TRANSITIONS[T(base.state, state)];
- if (typeof transition === 'function') {
- transition(base);
- base.state = state;
- } else { // unkown transition - shouldn't happen
- // nl avoids looping
- nl || base.updateState(null, true);
- }
- };
-
- // Run the initialization method
- base.init();
- };
-
- $.InFieldLabels.defaultOptions = {
- emptyWatch: true, // Keep watching the field as the user types (slower but brings back the label immediately when the field is emptied)
- disableAutocomplete: true, // Disable autocomplete on the matched fields
- fadeOpacity: 0.5, // Once a field has focus, how transparent should the label be
- fadeDuration: 300, // How long should it take to animate from 1.0 opacity to the fadeOpacity
- labelClass: 'in-field' // CSS class to apply to the label when it gets in-field
- };
-
-
- $.fn.inFieldLabels = function (options) {
- return this.each(function () {
- if (this.tagName !== 'LABEL') {
- return;
- }
- // Find input or textarea based on for= attribute
- // The for attribute on the label must contain the ID
- // of the input or textarea element
- var for_attr = this.getAttribute('for') || this.htmlFor,
- field, valid = true;
- if (!for_attr) {
- return; // Nothing to attach, since the for field wasn't used
- }
-
- // Find the referenced input or textarea element
- field = document.getElementById(for_attr);
- if (!field) {
- return;
- }
-
- if (field.tagName === 'INPUT') {
- valid = INPUT_TYPE.test(field.type.toLowerCase());
- } else if (field.tagName !== 'TEXTAREA') {
- valid = false;
- }
-
- valid = valid && !field.getAttribute('placeholder');
-
- if (!valid) {
- return; // Again, nothing to attach
- }
-
- // Only create object for input[text], input[password], or textarea
- (new $.InFieldLabels(this, field, options));
- });
- };
-
-}(jQuery));
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