bootstrap/js/bootstrap-twipsy.js

/* ==========================================================
 * bootstrap-twipsy.js v2.0.0
 * http://twitter.github.com/bootstrap/javascript.html#twipsy
 * Inspired by the original jQuery.tipsy by Jason Frame
 * ==========================================================
 * Copyright 2011 Twitter, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ========================================================== */

!function( $ ) {

  "use strict"

 /* TWIPSY PUBLIC CLASS DEFINITION
  * ============================== */

  var Twipsy = function ( element, options ) {
    this.init('twipsy', element, options)
  }

  Twipsy.prototype = {

    constructor: Twipsy

  , init: function ( type, element, options ) {
      var eventIn
        , eventOut

      this.type = type
      this.$element = $(element)
      this.options = this.getOptions(options)
      this.enabled = true

      if (this.options.trigger != 'manual') {
        eventIn  = this.options.trigger == 'hover' ? 'mouseenter' : 'focus'
        eventOut = this.options.trigger == 'hover' ? 'mouseleave' : 'blur'
        this.$element.on(eventIn, this.options.selector, $.proxy(this.enter, this))
        this.$element.on(eventOut, this.options.selector, $.proxy(this.leave, this))
      }

      this.options.selector ?
        (this._options = $.extend({}, this.options, { trigger: 'manual', selector: '' })) :
        this.fixTitle()
    }

  , getOptions: function ( options ) {
      options = $.extend({}, $.fn[this.type].defaults, options, this.$element.data())

      if (options.delay && typeof options.delay == 'number') {
        options.delay = {
          show: options.delay
        , hide: options.delay
        }
      }

      return options
    }

  , enter: function ( e ) {
      var self = $(e.currentTarget)[this.type](this._options).data(this.type)

      if (!self.options.delay || !self.options.delay.show) {
        self.show()
      } else {
        self.hoverState = 'in'
        setTimeout(function() {
          if (self.hoverState == 'in') {
            self.show()
          }
        }, self.options.delay.show)
      }
    }

  , leave: function ( e ) {
      var self = $(e.currentTarget)[this.type](this._options).data(this.type)

      if (!self.options.delay || !self.options.delay.hide) {
        self.hide()
      } else {
        setTimeout(function() {
          self.hoverState = 'out'
          if (self.hoverState == 'out') {
            self.hide()
          }
        }, self.options.delay.hide)
      }
    }

  , show: function () {
      var $tip
        , pos
        , actualWidth
        , actualHeight
        , placement
        , tp

      if (this.hasContent() && this.enabled) {
        $tip = this.tip()
        this.setContent()

        if (this.options.animate) {
          $tip.addClass('fade')
        }

        $tip
          .remove()
          .css({ top: 0, left: 0, display: 'block' })
          .prependTo(document.body)

        pos = $.extend({}, this.$element.offset(), {
          width: this.$element[0].offsetWidth
        , height: this.$element[0].offsetHeight
        })

        actualWidth = $tip[0].offsetWidth
        actualHeight = $tip[0].offsetHeight

        placement = maybeCall(this.options.placement, this, [ $tip[0], this.$element[0] ])

        switch (placement) {
          case 'below':
            tp = {top: pos.top + pos.height, left: pos.left + pos.width / 2 - actualWidth / 2}
            break
          case 'above':
            tp = {top: pos.top - actualHeight, left: pos.left + pos.width / 2 - actualWidth / 2}
            break
          case 'left':
            tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth}
            break
          case 'right':
            tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width}
            break
        }

        $tip
          .css(tp)
          .addClass(placement)
          .addClass('in')
      }
    }

  , setContent: function () {
      var $tip = this.tip()
      $tip.find('.twipsy-inner').html(this.getTitle())
      $tip[0].className = 'twipsy'
    }

  , hide: function () {
      var that = this
        , $tip = this.tip()

      $tip.removeClass('in')

      function removeElement () {
        $tip.remove()
      }

      $.support.transition && this.$tip.hasClass('fade') ?
        $tip.on($.support.transition.end, removeElement) :
        removeElement()
    }

  , fixTitle: function () {
      var $e = this.$element
      if ($e.attr('title') || typeof($e.attr('data-original-title')) != 'string') {
        $e.attr('data-original-title', $e.attr('title') || '').removeAttr('title')
      }
    }

  , hasContent: function () {
      return this.getTitle()
    }

  , getTitle: function () {
      var title
        , $e = this.$element
        , o = this.options

      title = $e.attr('data-original-title')
        || (typeof o.title == 'function' ? o.title.call($e[0]) :  o.title)

      title = title.toString().replace(/(^\s*|\s*$)/, "")

      return title
    }

  , tip: function () {
      return this.$tip = this.$tip || $(this.options.template)
    }

  , validate: function () {
      if (!this.$element[0].parentNode) {
        this.hide()
        this.$element = null
        this.options = null
      }
    }

  , enable: function () {
      this.enabled = true
    }

  , disable: function () {
      this.enabled = false
    }

  , toggleEnabled: function () {
      this.enabled = !this.enabled
    }

  , toggle: function () {
      this[this.tip().hasClass('in') ? 'hide' : 'show']()
    }

  }


 /* TWIPSY PRIVATE METHODS
  * ====================== */

   function maybeCall ( thing, ctx, args ) {
     return typeof thing == 'function' ? thing.apply(ctx, args) : thing
   }


 /* TWIPSY PLUGIN DEFINITION
  * ======================== */

  $.fn.twipsy = function ( option ) {
    return this.each(function () {
      var $this = $(this)
        , data = $this.data('twipsy')
        , options = typeof option == 'object' && option
      if (!data) $this.data('twipsy', (data = new Twipsy(this, options)))
      if (typeof option == 'string') data[option]()
    })
  }

  $.fn.twipsy.Twipsy = Twipsy

  $.fn.twipsy.defaults = {
    animate: true
  , delay: 0
  , selector: false
  , placement: 'above'
  , trigger: 'hover'
  , title: ''
  , template: '<div class="twipsy"><div class="twipsy-arrow"></div><div class="twipsy-inner"></div></div>'
  }

}( window.jQuery )