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Editing: modal.js

/* ========================================================================
 * Bootstrap: modal.js v3.3.1
 * http://getbootstrap.com/javascript/#modals
 * ========================================================================
 * Copyright 2011-2014 Twitter, Inc.
 * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
 * ======================================================================== */

+function ($) {
    'use strict';

// MODAL CLASS DEFINITION
    // ======================

var Modal = function (element, options) {
        this.options        = options
        this.$body          = $(document.body)
        this.$element       = $(element)
        this.$backdrop      =
            this.isShown        = null
        this.scrollbarWidth = 0

if (this.options.remote) {
            this.$element
                .find('.modal-content')
                .load(this.options.remote, $.proxy(function () {
                    this.$element.trigger('loaded.bs.modal')
                }, this))
        }
    }

Modal.VERSION  = '3.3.1'

Modal.TRANSITION_DURATION = 300
    Modal.BACKDROP_TRANSITION_DURATION = 150

Modal.DEFAULTS = {
        backdrop: true,
        keyboard: true,
        show: true
    }

Modal.prototype.toggle = function (_relatedTarget) {
        return this.isShown ? this.hide() : this.show(_relatedTarget)
    }

Modal.prototype.show = function (_relatedTarget) {
        var that = this
        var e    = $.Event('show.bs.modal', { relatedTarget: _relatedTarget })

this.$element.trigger(e)

if (this.isShown || e.isDefaultPrevented()) return

this.isShown = true

this.checkScrollbar()
        this.setScrollbar()
        this.$body.addClass('modal-open')

this.escape()
        this.resize()

this.$element.on('click.dismiss.bs.modal', '[data-dismiss="modal"]', $.proxy(this.hide, this))

this.backdrop(function () {
            var transition = $.support.transition && that.$element.hasClass('fade')

if (!that.$element.parent().length) {
                that.$element.appendTo(that.$body) // don't move modals dom position
            }

that.$element
                .show()
                .scrollTop(0)

if (that.options.backdrop) that.adjustBackdrop()
            that.adjustDialog()

if (transition) {
                that.$element[0].offsetWidth // force reflow
            }

that.$element
                .addClass('in')
                .attr('aria-hidden', false)

that.enforceFocus()

var e = $.Event('shown.bs.modal', { relatedTarget: _relatedTarget })

transition ?
                that.$element.find('.modal-dialog') // wait for modal to slide in
                    .one('bsTransitionEnd', function () {
                        that.$element.trigger('focus').trigger(e)
                    })
                    .emulateTransitionEnd(Modal.TRANSITION_DURATION) :
                that.$element.trigger('focus').trigger(e)
        })
    }

Modal.prototype.hide = function (e) {
        if (e) e.preventDefault()

e = $.Event('hide.bs.modal')

this.$element.trigger(e)

if (!this.isShown || e.isDefaultPrevented()) return

this.isShown = false

this.escape()
        this.resize()

$(document).off('focusin.bs.modal')

this.$element
            .removeClass('in')
            .attr('aria-hidden', true)
            .off('click.dismiss.bs.modal')

$.support.transition && this.$element.hasClass('fade') ?
            this.$element
                .one('bsTransitionEnd', $.proxy(this.hideModal, this))
                .emulateTransitionEnd(Modal.TRANSITION_DURATION) :
            this.hideModal()
    }

Modal.prototype.enforceFocus = function () {
        $(document)
            .off('focusin.bs.modal') // guard against infinite focus loop
            .on('focusin.bs.modal', $.proxy(function (e) {
                if (this.$element[0] !== e.target && !this.$element.has(e.target).length) {
                    this.$element.trigger('focus')
                }
            }, this))
    }

Modal.prototype.escape = function () {
        if (this.isShown && this.options.keyboard) {
            this.$element.on('keydown.dismiss.bs.modal', $.proxy(function (e) {
                e.which == 27 && this.hide()
            }, this))
        } else if (!this.isShown) {
            this.$element.off('keydown.dismiss.bs.modal')
        }
    }

Modal.prototype.resize = function () {
        if (this.isShown) {
            $(window).on('resize.bs.modal', $.proxy(this.handleUpdate, this))
        } else {
            $(window).off('resize.bs.modal')
        }
    }

Modal.prototype.hideModal = function () {
        var that = this
        this.$element.hide()
        this.backdrop(function () {
            that.$body.removeClass('modal-open')
            that.resetAdjustments()
            that.resetScrollbar()
            that.$element.trigger('hidden.bs.modal')
        })
    }

Modal.prototype.removeBackdrop = function () {
        this.$backdrop && this.$backdrop.remove()
        this.$backdrop = null
    }

Modal.prototype.backdrop = function (callback) {
        var that = this
        var animate = this.$element.hasClass('fade') ? 'fade' : ''

if (this.isShown && this.options.backdrop) {
            var doAnimate = $.support.transition && animate

this.$backdrop = $('<div class="modal-backdrop ' + animate + '" />')
                .prependTo(this.$element)
                .on('click.dismiss.bs.modal', $.proxy(function (e) {
                    if (e.target !== e.currentTarget) return
                    this.options.backdrop == 'static'
                        ? this.$element[0].focus.call(this.$element[0])
                        : this.hide.call(this)
                }, this))

if (doAnimate) this.$backdrop[0].offsetWidth // force reflow

this.$backdrop.addClass('in')

if (!callback) return

doAnimate ?
                this.$backdrop
                    .one('bsTransitionEnd', callback)
                    .emulateTransitionEnd(Modal.BACKDROP_TRANSITION_DURATION) :
                callback()

} else if (!this.isShown && this.$backdrop) {
            this.$backdrop.removeClass('in')

var callbackRemove = function () {
                that.removeBackdrop()
                callback && callback()
            }
            $.support.transition && this.$element.hasClass('fade') ?
                this.$backdrop
                    .one('bsTransitionEnd', callbackRemove)
                    .emulateTransitionEnd(Modal.BACKDROP_TRANSITION_DURATION) :
                callbackRemove()

} else if (callback) {
            callback()
        }
    }

// these following methods are used to handle overflowing modals

Modal.prototype.handleUpdate = function () {
        if (this.options.backdrop) this.adjustBackdrop()
        this.adjustDialog()
    }

Modal.prototype.adjustBackdrop = function () {
        this.$backdrop
            .css('height', 0)
            .css('height', this.$element[0].scrollHeight)
    }

Modal.prototype.adjustDialog = function () {
        var modalIsOverflowing = this.$element[0].scrollHeight > document.documentElement.clientHeight

this.$element.css({
            paddingLeft:  !this.bodyIsOverflowing && modalIsOverflowing ? this.scrollbarWidth : '',
            paddingRight: this.bodyIsOverflowing && !modalIsOverflowing ? this.scrollbarWidth : ''
        })
    }

Modal.prototype.resetAdjustments = function () {
        this.$element.css({
            paddingLeft: '',
            paddingRight: ''
        })
    }

Modal.prototype.checkScrollbar = function () {
        this.bodyIsOverflowing = document.body.scrollHeight > document.documentElement.clientHeight
        this.scrollbarWidth = this.measureScrollbar()
    }

Modal.prototype.setScrollbar = function () {
        var bodyPad = parseInt((this.$body.css('padding-right') || 0), 10)
        if (this.bodyIsOverflowing) this.$body.css('padding-right', bodyPad + this.scrollbarWidth)
    }

Modal.prototype.resetScrollbar = function () {
        this.$body.css('padding-right', '')
    }

Modal.prototype.measureScrollbar = function () { // thx walsh
        var scrollDiv = document.createElement('div')
        scrollDiv.className = 'modal-scrollbar-measure'
        this.$body.append(scrollDiv)
        var scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth
        this.$body[0].removeChild(scrollDiv)
        return scrollbarWidth
    }

// MODAL PLUGIN DEFINITION
    // =======================

function Plugin(option, _relatedTarget) {
        return this.each(function () {
            var $this   = $(this)
            var data    = $this.data('bs.modal')
            var options = $.extend({}, Modal.DEFAULTS, $this.data(), typeof option == 'object' && option)

if (!data) $this.data('bs.modal', (data = new Modal(this, options)))
            if (typeof option == 'string') data[option](_relatedTarget)
            else if (options.show) data.show(_relatedTarget)
        })
    }

var old = $.fn.modal

$.fn.modal             = Plugin
    $.fn.modal.Constructor = Modal

// MODAL NO CONFLICT
    // =================

$.fn.modal.noConflict = function () {
        $.fn.modal = old
        return this
    }

// MODAL DATA-API
    // ==============

$(document).on('click.bs.modal.data-api', '[data-toggle="modal"]', function (e) {
        var $this   = $(this)
        var href    = $this.attr('href')
        var $target = $($this.attr('data-target') || (href && href.replace(/.*(?=#[^\s]+$)/, ''))) // strip for ie7
        var option  = $target.data('bs.modal') ? 'toggle' : $.extend({ remote: !/#/.test(href) && href }, $target.data(), $this.data())

if ($this.is('a')) e.preventDefault()

$target.one('show.bs.modal', function (showEvent) {
            if (showEvent.isDefaultPrevented()) return // only register focus restorer if modal will actually get shown
            $target.one('hidden.bs.modal', function () {
                $this.is(':visible') && $this.trigger('focus')
            })
        })
        Plugin.call($target, option, this)
    })

}(jQuery);

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