resources/src/jquery.tipsy/jquery.tipsy.js

   1 // tipsy, facebook style tooltips for jquery
   2 // version 1.0.0a*
   3 // (c) 2008-2010 jason frame [jason@onehackoranother.com]
   4 // released under the MIT license
   5
   6 // * This installation of tipsy includes several local modifications to both Javascript and CSS.
   7 //   Please be careful when upgrading.
   8
   9 ( function ( mw, $ ) {
  10
  11     function maybeCall(thing, ctx) {
  12         return (typeof thing == 'function') ? (thing.call(ctx)) : thing;
  13     }
  14
  15     function Tipsy(element, options) {
  16         this.$element = $(element);
  17         this.options = options;
  18         this.enabled = true;
  19         this.keyHandler = $.proxy( this.closeOnEsc, this );
  20         this.fixTitle();
  21     }
  22
  23     Tipsy.prototype = {
  24         show: function() {
  25             var title = this.getTitle();
  26             if (title && this.enabled) {
  27                 var $tip = this.tip();
  28
  29                 $tip.find('.tipsy-inner')[this.options.html ? 'html' : 'text'](title);
  30                 $tip[0].className = 'tipsy'; // reset classname in case of dynamic gravity
  31                 if (this.options.className) {
  32                     $tip.addClass(maybeCall(this.options.className, this.$element[0]));
  33                 }
  34                 $tip.remove()
  35                     .css({top: 0, left: 0, visibility: 'hidden', display: 'block'})
  36                     .attr( 'aria-hidden', 'true' )
  37                     .appendTo(document.body);
  38
  39                 var pos = $.extend({}, this.$element.offset(), {
  40                     width: this.$element[0].offsetWidth,
  41                     height: this.$element[0].offsetHeight
  42                 });
  43
  44                 var gravity = (typeof this.options.gravity == 'function')
  45                                 ? this.options.gravity.call(this.$element[0])
  46                                 : this.options.gravity;
  47
  48                 // Attach css classes before checking height/width so they
  49                 // can be applied.
  50                 $tip.addClass('tipsy-' + gravity);
  51                 if (this.options.className) {
  52                     $tip.addClass(maybeCall(this.options.className, this.$element[0]));
  53                 }
  54
  55                 var actualWidth = $tip[0].offsetWidth, actualHeight = $tip[0].offsetHeight;
  56                 var tp;
  57                 switch (gravity.charAt(0)) {
  58                     case 'n':
  59                         tp = {top: pos.top + pos.height + this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2};
  60                         break;
  61                     case 's':
  62                         tp = {top: pos.top - actualHeight - this.options.offset, left: pos.left + pos.width / 2 - actualWidth / 2};
  63                         break;
  64                     case 'e':
  65                         tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth - this.options.offset};
  66                         break;
  67                     case 'w':
  68                         tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width + this.options.offset};
  69                         break;
  70                 }
  71
  72                 if (gravity.length == 2) {
  73                     if (gravity.charAt(1) == 'w') {
  74                         if (this.options.center) {
  75                             tp.left = pos.left + pos.width / 2 - 15;
  76                         } else {
  77                             tp.left = pos.left;
  78                         }
  79                     } else {
  80                         if (this.options.center) {
  81                             tp.left = pos.left + pos.width / 2 - actualWidth + 15;
  82                         } else {
  83                             tp.left = pos.left + pos.width;
  84                         }
  85                     }
  86                 }
  87                 $tip.css(tp);
  88
  89                 $( document ).on( 'keydown', this.keyHandler );
  90                 if (this.options.fade) {
  91                     $tip.stop()
  92                         .css({opacity: 0, display: 'block', visibility: 'visible'})
  93                         .attr( 'aria-hidden', 'false' )
  94                         .animate({opacity: this.options.opacity}, 100);
  95                 } else {
  96                     $tip
  97                         .css({visibility: 'visible', opacity: this.options.opacity})
  98                         .attr( 'aria-hidden', 'false' );
  99                 }
 100             }
 101         },
 102
 103         hide: function() {
 104             $( document ).off( 'keydown', this.keyHandler );
 105             if (this.options.fade) {
 106                 this.tip().stop().fadeOut(100, function() { $(this).remove(); });
 107             } else {
 108                 this.tip().remove();
 109             }
 110         },
 111
 112         fixTitle: function() {
 113             var $e = this.$element;
 114             if ($e.attr('title') || typeof($e.attr('original-title')) != 'string') {
 115                 $e.attr('original-title', $e.attr('title') || '').removeAttr('title');
 116             }
 117         },
 118
 119         getTitle: function() {
 120             var title, $e = this.$element, o = this.options;
 121             this.fixTitle();
 122             if (typeof o.title == 'string') {
 123                 title = $e.attr(o.title == 'title' ? 'original-title' : o.title);
 124             } else if (typeof o.title == 'function') {
 125                 title = o.title.call($e[0]);
 126             }
 127             title = ('' + title).replace(/(^\s*|\s*$)/, "");
 128             return title || o.fallback;
 129         },
 130
 131         tip: function() {
 132             if (!this.$tip) {
 133                 this.$tip = $('<div class="tipsy" role="tooltip"></div>').html('<div class="tipsy-arrow"></div><div class="tipsy-inner"></div>');
 134             }
 135             return this.$tip;
 136         },
 137
 138         validate: function() {
 139             if (!this.$element[0].parentNode) {
 140                 this.hide();
 141                 this.$element = null;
 142                 this.options = null;
 143             }
 144         },
 145
 146         // $.proxy event handler
 147         closeOnEsc: function ( e ) {
 148             if ( e.keyCode === 27 ) {
 149                 this.hide();
 150             }
 151         },
 152
 153         enable: function() { this.enabled = true; },
 154         disable: function() { this.enabled = false; },
 155         toggleEnabled: function() { this.enabled = !this.enabled; }
 156     };
 157
 158     $.fn.tipsy = function(options) {
 159
 160         if (options === true) {
 161             return this.data('tipsy');
 162         } else if (typeof options == 'string') {
 163             var tipsy = this.data('tipsy');
 164             if (tipsy) tipsy[options]();
 165             return this;
 166         }
 167
 168         options = $.extend({}, $.fn.tipsy.defaults, options);
 169
 170         function get(ele) {
 171             var tipsy = $.data(ele, 'tipsy');
 172             if (!tipsy) {
 173                 tipsy = new Tipsy(ele, $.fn.tipsy.elementOptions(ele, options));
 174                 $.data(ele, 'tipsy', tipsy);
 175             }
 176             return tipsy;
 177         }
 178
 179         function enter() {
 180             var tipsy = get(this);
 181             tipsy.hoverState = 'in';
 182             if (options.delayIn == 0) {
 183                 tipsy.show();
 184             } else {
 185                 tipsy.fixTitle();
 186                 setTimeout(function() { if (tipsy.hoverState == 'in') tipsy.show(); }, options.delayIn);
 187             }
 188         };
 189
 190         function leave() {
 191             var tipsy = get(this);
 192             tipsy.hoverState = 'out';
 193             if (options.delayOut == 0) {
 194                 tipsy.hide();
 195             } else {
 196                 setTimeout(function() { if (tipsy.hoverState == 'out') tipsy.hide(); }, options.delayOut);
 197             }
 198         };
 199
 200         this.each(function() { get(this); });
 201
 202         if ( options.trigger != 'manual' ) {
 203             var eventIn  = options.trigger == 'hover' ? 'mouseenter focus' : 'focus',
 204                 eventOut = options.trigger == 'hover' ? 'mouseleave blur' : 'blur';
 205             if ( options.live ) {
 206                 mw.track( 'mw.deprecate', 'tipsy-live' );
 207                 mw.log.warn( 'Use of the "live" option of jquery.tipsy is no longer supported.' );
 208             }
 209             this
 210                 .on( eventIn, enter )
 211                 .on( eventOut, leave );
 212         }
 213
 214         return this;
 215
 216     };
 217
 218     $.fn.tipsy.defaults = {
 219         className: null,
 220         delayIn: 0,
 221         delayOut: 0,
 222         fade: true,
 223         fallback: '',
 224         gravity: 'n',
 225         center: true,
 226         html: false,
 227         live: false,
 228         offset: 0,
 229         opacity: 1.0,
 230         title: 'title',
 231         trigger: 'hover'
 232     };
 233
 234     // Overwrite this method to provide options on a per-element basis.
 235     // For example, you could store the gravity in a 'tipsy-gravity' attribute:
 236     // return $.extend({}, options, {gravity: $(ele).attr('tipsy-gravity') || 'n' });
 237     // (remember - do not modify 'options' in place!)
 238     $.fn.tipsy.elementOptions = function(ele, options) {
 239         return $.metadata ? $.extend({}, options, $(ele).metadata()) : options;
 240     };
 241
 242     $.fn.tipsy.autoNS = function() {
 243         return $(this).offset().top > ($(document).scrollTop() + $(window).height() / 2) ? 's' : 'n';
 244     };
 245
 246     $.fn.tipsy.autoWE = function() {
 247         return $(this).offset().left > ($(document).scrollLeft() + $(window).width() / 2) ? 'e' : 'w';
 248     };
 249
 250     /**
 251      * yields a closure of the supplied parameters, producing a function that takes
 252      * no arguments and is suitable for use as an autogravity function like so:
 253      *
 254      * @param margin (int) - distance from the viewable region edge that an
 255      *        element should be before setting its tooltip's gravity to be away
 256      *        from that edge.
 257      * @param prefer (string, e.g. 'n', 'sw', 'w') - the direction to prefer
 258      *        if there are no viewable region edges effecting the tooltip's
 259      *        gravity. It will try to vary from this minimally, for example,
 260      *        if 'sw' is preferred and an element is near the right viewable
 261      *        region edge, but not the top edge, it will set the gravity for
 262      *        that element's tooltip to be 'se', preserving the southern
 263      *        component.
 264      */
 265      $.fn.tipsy.autoBounds = function(margin, prefer) {
 266         return function() {
 267             var dir = {ns: prefer[0], ew: (prefer.length > 1 ? prefer[1] : false)},
 268                 boundTop = $(document).scrollTop() + margin,
 269                 boundLeft = $(document).scrollLeft() + margin,
 270                 $this = $(this);
 271
 272             if ($this.offset().top < boundTop) dir.ns = 'n';
 273             if ($this.offset().left < boundLeft) dir.ew = 'w';
 274             if ($(window).width() + $(document).scrollLeft() - $this.offset().left < margin) dir.ew = 'e';
 275             if ($(window).height() + $(document).scrollTop() - $this.offset().top < margin) dir.ns = 's';
 276
 277             return dir.ns + (dir.ew ? dir.ew : '');
 278         }
 279     };
 280
 281 }( mediaWiki, jQuery ) );