Bootstrap tooltip plugin - modified to be rendered within the viewport and not runoff. Added a placement option 'auto' which determines the correct placement depending on viewport size. If suitable space is not available on any side of the element, then t

bootstrap.tooltip.js

/* ===========================================================
 * bootstrap-tooltip.js v2.1.1
 * http://twitter.github.com/bootstrap/javascript.html#tooltips
 * Inspired by the original jQuery.tipsy by Jason Frame
 * ===========================================================
 * Copyright 2012 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"; // jshint ;_;


 /* TOOLTIP PUBLIC CLASS DEFINITION
  * =============================== */

  var Tooltip = function (element, options) {
    this.init('tooltip', element, options)
  }

  Tooltip.prototype = {

    constructor: Tooltip

  , 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 == 'click') {
        this.$element.on('click.' + this.type, this.options.selector, $.proxy(this.toggle, this))
      } else if (this.options.trigger != 'manual') {
        eventIn = this.options.trigger == 'hover' ? 'mouseenter' : 'focus'
        eventOut = this.options.trigger == 'hover' ? 'mouseleave' : 'blur'
        this.$element.on(eventIn + '.' + this.type, this.options.selector, $.proxy(this.enter, this))
        this.$element.on(eventOut + '.' + this.type, 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) return self.show()

      clearTimeout(this.timeout)
      self.hoverState = 'in'
      this.timeout = 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 (this.timeout) clearTimeout(this.timeout)
      if (!self.options.delay || !self.options.delay.hide) return self.hide()

      self.hoverState = 'out'
      this.timeout = setTimeout(function() {
        if (self.hoverState == 'out') self.hide()
      }, self.options.delay.hide)
    }

  , show: function () {
      var $tip
        , inside
        , pos
        , actualWidth
        , actualHeight
        , placement
        , tp
        , wp
        , $arrow
        , ap
        , apFlags = {}

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

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

        placement = typeof this.options.placement == 'function' ?
          this.options.placement.call(this, $tip[0], this.$element[0]) :
          this.options.placement

        inside = /in/.test(placement)

        $tip
          .remove()
          .css({ top: 0, left: 0, display: 'block' })
          .appendTo(inside ? this.$element : this.options.attachTo ? this.options.attachTo : document.body) 

        if(this.options.onShow) this.options.onShow();
        if(this.options.onClick) $tip.on('click', this.options.onClick);

        pos = this.getPosition(inside)

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

        wp = {height: $(window).height(), width: $(window).width()}

        if (inside ? placement.split(' ')[1] : placement == 'auto') {
            if (pos.left + pos.width + actualWidth < wp.width)
              placement = placement.replace('auto', 'right')
            else if (pos.left - actualWidth > 0)
              placement = placement.replace('auto', 'left')
            else if (pos.top + pos.height + actualHeight < wp.height)
              placement = placement.replace('auto', 'bottom')
            else if (pos.top - actualHeight > 0)
              placement = placement.replace('auto', 'top')
            else
              placement = placement.replace('auto', 'center')
        }

        switch (inside ? placement.split(' ')[1] : placement) {
          case 'bottom':
            tp = {top: pos.top + pos.height, left: pos.left + pos.width / 2 - actualWidth / 2}
            apFlags.left = true
            break
          case 'top':
            tp = {top: pos.top - actualHeight - 10, left: pos.left + pos.width / 2 - actualWidth / 2}
            apFlags.left = true
            break
          case 'left':
            tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left - actualWidth - 10}
            apFlags.top = true
            break
          case 'right':
            tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width}
            apFlags.top = true
            break
          case 'center':
            tp = {top: pos.top + pos.height / 2 - actualHeight / 2, left: pos.left + pos.width / 2 - actualWidth / 2}
            break
        }

        if(tp.top + actualHeight > wp.height)
          tp.top = ( wp.height - actualHeight )
        if(tp.top < 0)
          tp.top = 0
        if(tp.left + actualWidth > wp.width)
          tp.left = ( wp.width - actualWidth )
        if(tp.left < 0)
          tp.left = 0

        $arrow = $('.arrow', $tip)
        if(apFlags.top && actualHeight > pos.height)
          $arrow.css('top', pos.top + pos.height / 2 - tp.top)
        if(apFlags.left && actualWidth > pos.width)
          $arrow.css('left', pos.left + pos.width / 2 - tp.left)

        ap = $arrow.position()
        if(ap && (ap.top < 0 || ap.left < 0 || ap.left + 10 > pos.left + pos.width || ap.top + 10 > pos.top + pos.width))
          $arrow.css('display', 'none')

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

  , setContent: function () {
      var $tip = this.tip()
        , title = this.getTitle()

      $tip.find('.tooltip-inner')[this.options.html ? 'html' : 'text'](title)
      $tip.removeClass('fade in top bottom left right')
    }

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

      $tip.removeClass('in')

      function removeWithAnimation() {
        var timeout = setTimeout(function () {
          $tip.off($.support.transition.end).remove()
        }, 500)

        $tip.one($.support.transition.end, function () {
          clearTimeout(timeout)
          $tip.remove()
        })
      }

      $.support.transition && this.$tip.hasClass('fade') ?
        removeWithAnimation() :
        $tip.remove()

      return this
    }

  , 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()
    }

  , getPosition: function (inside) {
      return $.extend({}, (inside ? {top: 0, left: 0} : this.$element.offset()), {
        width: this.$element[0].offsetWidth
      , height: this.$element[0].offsetHeight
      })
    }

  , 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)

      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']()
    }

  , destroy: function () {
      this.hide().$element.off('.' + this.type).removeData(this.type)
    }

  }


 /* TOOLTIP PLUGIN DEFINITION
  * ========================= */

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

  $.fn.tooltip.Constructor = Tooltip

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

}(window.jQuery);