/**
 * Boxy 0.1.4 - Facebook-style dialog, with frills
 *
 * (c) 2008 Jason Frame
 * Licensed under the MIT License (LICENSE)
 */
 
/*
 * jQuery plugin
 *
 * Options:
 *   message: confirmation message for form submit hook (default: "Please confirm:")
 * 
 * Any other options - e.g. 'clone' - will be passed onto the boxy constructor (or
 * Boxy.load for AJAX operations)
 */
jQuery.fn.boxy = function(options) {
    options = options || {};
    return this.each(function() {      
        var node = this.nodeName.toLowerCase(), self = this;
        if (node == 'a') {
            jQuery(this).click(function() {
                var active = Boxy.linkedTo(this),
                    href = this.getAttribute('href'),
                    localOptions = jQuery.extend({actuator: this, title: this.title}, options);
                    
                if (active) {
                    active.show();
                } else if (href.indexOf('#') >= 0) {
                    var content = jQuery(href.substr(href.indexOf('#'))),
                        newContent = content.clone(true);
                    content.remove();
                    localOptions.unloadOnHide = false;
                    new Boxy(newContent, localOptions);
                } else { // fall back to AJAX; could do with a same-origin check
                    if (!localOptions.cache) localOptions.unloadOnHide = true;
                    Boxy.load(this.href, localOptions);
                }
                
                return false;
            });
        } else if (node == 'form') {
            jQuery(this).bind('submit.boxy', function() {
                Boxy.confirm(options.message || 'Please confirm:', function() {
                    jQuery(self).unbind('submit.boxy').submit();
                });
                return false;
            });
        }
    });
};

//
// Boxy Class

function Boxy(element, options) {
    
    this.boxy = jQuery(Boxy.WRAPPER);
    jQuery.data(this.boxy[0], 'boxy', this);
    
    this.visible = false;
    this.options = jQuery.extend({}, Boxy.DEFAULTS, options || {});
    
    if (this.options.modal) {
        this.options = jQuery.extend(this.options, {center: true, draggable: false});
    }
    
    // options.actuator == DOM element that opened this boxy
    // association will be automatically deleted when this boxy is remove()d
    if (this.options.actuator) {
        jQuery.data(this.options.actuator, 'active.boxy', this);
    }
    
    this.setContent(element || "<div></div>");
    this._setupTitleBar();
    
    this.boxy.css('display', 'none').appendTo(document.body);
    this.toTop();

    if (this.options.fixed) {
        if (jQuery.browser.msie && jQuery.browser.version < 7) {
            this.options.fixed = false; // IE6 doesn't support fixed positioning
        } else {
            this.boxy.addClass('fixed');
        }
    }
    
    if (this.options.center && Boxy._u(this.options.x, this.options.y)) {
        this.center();
    } else {
        this.moveTo(
            Boxy._u(this.options.x) ? this.options.x : Boxy.DEFAULT_X,
            Boxy._u(this.options.y) ? this.options.y : Boxy.DEFAULT_Y
        );
    }
    
    if (this.options.show) this.show();

};

Boxy.EF = function() {};

jQuery.extend(Boxy, {
    
    WRAPPER:    "<table cellspacing='0' cellpadding='0' border='0' class='boxy-wrapper'>" +
                "<tr><td class='top-left'></td><td class='top'></td><td class='top-right'></td></tr>" +
                "<tr><td class='left'></td><td class='boxy-inner'></td><td class='right'></td></tr>" +
                "<tr><td class='bottom-left'></td><td class='bottom'></td><td class='bottom-right'></td></tr>" +
                "</table>",
    
    DEFAULTS: {
        title:                  null,           // titlebar text. titlebar will not be visible if not set.
        closeable:              true,           // display close link in titlebar?
        draggable:              true,           // can this dialog be dragged?
        clone:                  false,          // clone content prior to insertion into dialog?
        actuator:               null,           // element which opened this dialog
        center:                 true,           // center dialog in viewport?
        show:                   true,           // show dialog immediately?
        modal:                  false,          // make dialog modal?
        fixed:                  true,           // use fixed positioning, if supported? absolute positioning used otherwise
        closeText:              '[close]',      // text to use for default close link
        unloadOnHide:           false,          // should this dialog be removed from the DOM after being hidden?
        clickToFront:           false,          // bring dialog to foreground on any click (not just titlebar)?
        behaviours:             Boxy.EF,        // function used to apply behaviours to all content embedded in dialog.
        afterDrop:              Boxy.EF,        // callback fired after dialog is dropped. executes in context of Boxy instance.
        afterShow:              Boxy.EF,        // callback fired after dialog becomes visible. executes in context of Boxy instance.
        afterHide:              Boxy.EF,        // callback fired after dialog is hidden. executed in context of Boxy instance.
        beforeUnload:           Boxy.EF         // callback fired after dialog is unloaded. executed in context of Boxy instance.
    },
    
    DEFAULT_X:          50,
    DEFAULT_Y:          50,
    zIndex:             1337,
    dragConfigured:     false, // only set up one drag handler for all boxys
    resizeConfigured:   false,
    dragging:           null,
    
    // load a URL and display in boxy
    // url - url to load
    // options keys (any not listed below are passed to boxy constructor)
    //   type: HTTP method, default: GET
    //   cache: cache retrieved content? default: false
    //   filter: jQuery selector used to filter remote content
    load: function(url, options) {
        
        options = options || {};
        
        var ajax = {
            url: url, type: 'GET', dataType: 'html', cache: false, success: function(html) {
                html = jQuery(html);
                if (options.filter) html = jQuery(options.filter, html);
                new Boxy(html, options);
            }
        };
        
        jQuery.each(['type', 'cache'], function() {
            if (this in options) {
                ajax[this] = options[this];
                delete options[this];
            }
        });
        
        jQuery.ajax(ajax);
        
    },
    
    // allows you to get a handle to the containing boxy instance of any element
    // e.g. <a href='#' onclick='alert(Boxy.get(this));'>inspect!</a>.
    // this returns the actual instance of the boxy 'class', not just a DOM element.
    // Boxy.get(this).hide() would be valid, for instance.
    get: function(ele) {
        var p = jQuery(ele).parents('.boxy-wrapper');
        return p.length ? jQuery.data(p[0], 'boxy') : null;
    },
    
    // returns the boxy instance which has been linked to a given element via the
    // 'actuator' constructor option.
    linkedTo: function(ele) {
        return jQuery.data(ele, 'active.boxy');
    },
    
    // displays an alert box with a given message, calling optional callback
    // after dismissal.
    alert: function(message, callback, options) {
        return Boxy.ask(message, ['OK'], callback, options);
    },
    
    // displays an alert box with a given message, calling after callback iff
    // user selects OK.
    confirm: function(message, after, options) {
        return Boxy.ask(message, ['OK', 'Cancel'], function(response) {
            if (response == 'OK') after();
        }, options);
    },
    
    // asks a question with multiple responses presented as buttons
    // selected item is returned to a callback method.
    // answers may be either an array or a hash. if it's an array, the
    // the callback will received the selected value. if it's a hash,
    // you'll get the corresponding key.
    ask: function(question, answers, callback, options) {
        
        options = jQuery.extend({modal: true, closeable: false},
                                options || {},
                                {show: true, unloadOnHide: true});
        
        var body = jQuery('<div></div>').append(jQuery('<div class="question"></div>').html(question));
        
        // ick
        var map = {}, answerStrings = [];
        if (answers instanceof Array) {
            for (var i = 0; i < answers.length; i++) {
                map[answers[i]] = answers[i];
                answerStrings.push(answers[i]);
            }
        } else {
            for (var k in answers) {
                map[answers[k]] = k;
                answerStrings.push(answers[k]);
            }
        }
        
        var buttons = jQuery('<form class="answers"></form>');
        buttons.html(jQuery.map(answerStrings, function(v) {
            return "<input type='button' value='" + v + "' />";
        }).join(' '));
        
        jQuery('input[type=button]', buttons).click(function() {
            var clicked = this;
            Boxy.get(this).hide(function() {
                if (callback) callback(map[clicked.value]);
            });
        });
        
        body.append(buttons);
        
        new Boxy(body, options);
        
    },
    
    // returns true if a modal boxy is visible, false otherwise
    isModalVisible: function() {
        return jQuery('.boxy-modal-blackout').length > 0;
    },
    
    _u: function() {
        for (var i = 0; i < arguments.length; i++)
            if (typeof arguments[i] != 'undefined') return false;
        return true;
    },
    
    _handleResize: function(evt) {
        var d = jQuery(document);
        jQuery('.boxy-modal-blackout').css('display', 'none').css({
            width: d.width(), height: d.height()
        }).css('display', 'block');
    },
    
    _handleDrag: function(evt) {
        var d;
        if (d = Boxy.dragging) {
            d[0].boxy.css({left: evt.pageX - d[1], top: evt.pageY - d[2]});
        }
    },
    
    _nextZ: function() {
        return Boxy.zIndex++;
    },
    
    _viewport: function() {
        var d = document.documentElement, b = document.body, w = window;
        return jQuery.extend(
            jQuery.browser.msie ?
                { left: b.scrollLeft || d.scrollLeft, top: b.scrollTop || d.scrollTop } :
                { left: w.pageXOffset, top: w.pageYOffset },
            !Boxy._u(w.innerWidth) ?
                { width: w.innerWidth, height: w.innerHeight } :
                (!Boxy._u(d) && !Boxy._u(d.clientWidth) && d.clientWidth != 0 ?
                    { width: d.clientWidth, height: d.clientHeight } :
                    { width: b.clientWidth, height: b.clientHeight }) );
    }

});

Boxy.prototype = {
    
    // Returns the size of this boxy instance without displaying it.
    // Do not use this method if boxy is already visible, use getSize() instead.
    estimateSize: function() {
        this.boxy.css({visibility: 'hidden', display: 'block'});
        var dims = this.getSize();
        this.boxy.css('display', 'none').css('visibility', 'visible');
        return dims;
    },
                
    // Returns the dimensions of the entire boxy dialog as [width,height]
    getSize: function() {
        return [this.boxy.width(), this.boxy.height()];
    },
    
    // Returns the dimensions of the content region as [width,height]
    getContentSize: function() {
        var c = this.getContent();
        return [c.width(), c.height()];
    },
    
    // Returns the position of this dialog as [x,y]
    getPosition: function() {
        var b = this.boxy[0];
        return [b.offsetLeft, b.offsetTop];
    },
    
    // Returns the center point of this dialog as [x,y]
    getCenter: function() {
        var p = this.getPosition();
        var s = this.getSize();
        return [Math.floor(p[0] + s[0] / 2), Math.floor(p[1] + s[1] / 2)];
    },
                
    // Returns a jQuery object wrapping the inner boxy region.
    // Not much reason to use this, you're probably more interested in getContent()
    getInner: function() {
        return jQuery('.boxy-inner', this.boxy);
    },
    
    // Returns a jQuery object wrapping the boxy content region.
    // This is the user-editable content area (i.e. excludes titlebar)
    getContent: function() {
        return jQuery('.boxy-content', this.boxy);
    },
    
    // Replace dialog content
    setContent: function(newContent) {
        newContent = jQuery(newContent).css({display: 'block'}).addClass('boxy-content');
        if (this.options.clone) newContent = newContent.clone(true);
        this.getContent().remove();
        this.getInner().append(newContent);
        this._setupDefaultBehaviours(newContent);
        this.options.behaviours.call(this, newContent);
        return this;
    },
    
    // Move this dialog to some position, funnily enough
    moveTo: function(x, y) {
        this.moveToX(x).moveToY(y);
        return this;
    },
    
    // Move this dialog (x-coord only)
    moveToX: function(x) {
        if (typeof x == 'number') this.boxy.css({left: x});
        else this.centerX();
        return this;
    },
    
    // Move this dialog (y-coord only)
    moveToY: function(y) {
        if (typeof y == 'number') this.boxy.css({top: y});
        else this.centerY();
        return this;
    },
    
    // Move this dialog so that it is centered at (x,y)
    centerAt: function(x, y) {
        var s = this[this.visible ? 'getSize' : 'estimateSize']();
        if (typeof x == 'number') this.moveToX(x - s[0] / 2);
        if (typeof y == 'number') this.moveToY(y - s[1] / 2);
        return this;
    },
    
    centerAtX: function(x) {
        return this.centerAt(x, null);
    },
    
    centerAtY: function(y) {
        return this.centerAt(null, y);
    },
    
    // Center this dialog in the viewport
    // axis is optional, can be 'x', 'y'.
    center: function(axis) {
        var v = Boxy._viewport();
        var o = this.options.fixed ? [0, 0] : [v.left, v.top];
        if (!axis || axis == 'x') this.centerAt(o[0] + v.width / 2, null);
        if (!axis || axis == 'y') this.centerAt(null, o[1] + v.height / 2);
        return this;
    },
    
    // Center this dialog in the viewport (x-coord only)
    centerX: function() {
        return this.center('x');
    },
    
    // Center this dialog in the viewport (y-coord only)
    centerY: function() {
        return this.center('y');
    },
    
    // Resize the content region to a specific size
    resize: function(width, height, after) {
        if (!this.visible) return;
        var bounds = this._getBoundsForResize(width, height);
        this.boxy.css({left: bounds[0], top: bounds[1]});
        this.getContent().css({width: bounds[2], height: bounds[3]});
        if (after) after(this);
        return this;
    },
    
    // Tween the content region to a specific size
    tween: function(width, height, after) {
        if (!this.visible) return;
        var bounds = this._getBoundsForResize(width, height);
        var self = this;
        this.boxy.stop().animate({left: bounds[0], top: bounds[1]});
        this.getContent().stop().animate({width: bounds[2], height: bounds[3]}, function() {
            if (after) after(self);
        });
        return this;
    },
    
    // Returns true if this dialog is visible, false otherwise
    isVisible: function() {
        return this.visible;    
    },
    
    // Make this boxy instance visible
    show: function() {
        if (this.visible) return;
        if (this.options.modal) {
            var self = this;
            if (!Boxy.resizeConfigured) {
                Boxy.resizeConfigured = true;
                jQuery(window).resize(function() { Boxy._handleResize(); });
            }
            this.modalBlackout = jQuery('<div class="boxy-modal-blackout"></div>')
                .css({zIndex: Boxy._nextZ(),
                      opacity: 0.7,
                      width: jQuery(document).width(),
                      height: jQuery(document).height()})
                .appendTo(document.body);
            this.toTop();
            if (this.options.closeable) {
                jQuery(document.body).bind('keypress.boxy', function(evt) {
                    var key = evt.which || evt.keyCode;
                    if (key == 27) {
                        self.hide();
                        jQuery(document.body).unbind('keypress.boxy');
                    }
                });
            }
        }
        this.boxy.stop().css({opacity: 1}).show();
        this.visible = true;
        this._fire('afterShow');
        return this;
    },
    
    // Hide this boxy instance
    hide: function(after) {
        if (!this.visible) return;
        var self = this;
        if (this.options.modal) {
            jQuery(document.body).unbind('keypress.boxy');
            this.modalBlackout.animate({opacity: 0}, function() {
                jQuery(this).remove();
            });
        }
        this.boxy.stop().animate({opacity: 0}, 300, function() {
            self.boxy.css({display: 'none'});
            self.visible = false;
            self._fire('afterHide');
            if (after) after(self);
            if (self.options.unloadOnHide) self.unload();
        });
        return this;
    },
    
    toggle: function() {
        this[this.visible ? 'hide' : 'show']();
        return this;
    },
    
    hideAndUnload: function(after) {
        this.options.unloadOnHide = true;
        this.hide(after);
        return this;
    },
    
    unload: function() {
        this._fire('beforeUnload');
        this.boxy.remove();
        if (this.options.actuator) {
            jQuery.data(this.options.actuator, 'active.boxy', false);
        }
    },
    
    // Move this dialog box above all other boxy instances
    toTop: function() {
        this.boxy.css({zIndex: Boxy._nextZ()});
        return this;
    },
    
    // Returns the title of this dialog
    getTitle: function() {
        return jQuery('> .title-bar h2', this.getInner()).html();
    },
    
    // Sets the title of this dialog
    setTitle: function(t) {
        jQuery('> .title-bar h2', this.getInner()).html(t);
        return this;
    },
    
    //
    // Don't touch these privates
    
    _getBoundsForResize: function(width, height) {
        var csize = this.getContentSize();
        var delta = [width - csize[0], height - csize[1]];
        var p = this.getPosition();
        return [Math.max(p[0] - delta[0] / 2, 0),
                Math.max(p[1] - delta[1] / 2, 0), width, height];
    },
    
    _setupTitleBar: function() {
        if (this.options.title) {
            var self = this;
            var tb = jQuery("<div class='title-bar'></div>").html("<h2>" + this.options.title + "</h2>");
            if (this.options.closeable) {
                tb.append(jQuery("<a href='#' class='close'></a>").html(this.options.closeText));
            }
            if (this.options.draggable) {
                tb[0].onselectstart = function() { return false; }
                tb[0].unselectable = 'on';
                tb[0].style.MozUserSelect = 'none';
                if (!Boxy.dragConfigured) {
                    jQuery(document).mousemove(Boxy._handleDrag);
                    Boxy.dragConfigured = true;
                }
                tb.mousedown(function(evt) {
                    self.toTop();
                    Boxy.dragging = [self, evt.pageX - self.boxy[0].offsetLeft, evt.pageY - self.boxy[0].offsetTop];
                    jQuery(this).addClass('dragging');
                }).mouseup(function() {
                    jQuery(this).removeClass('dragging');
                    Boxy.dragging = null;
                    self._fire('afterDrop');
                });
            }
            this.getInner().prepend(tb);
            this._setupDefaultBehaviours(tb);
        }
    },
    
    _setupDefaultBehaviours: function(root) {
        var self = this;
        if (this.options.clickToFront) {
            root.click(function() { self.toTop(); });
        }
        jQuery('.close', root).click(function() {
            self.hide();
            return false;
        }).mousedown(function(evt) { evt.stopPropagation(); });
    },
    
    _fire: function(event) {
        this.options[event].call(this);
    }
    
};

/* Added this for prosperity, its just a helper method, and requires boxy to be included to run it anyway, so makes sense to have it here, only important thing to note is that it needs to be loaded before any subsequent javascript function can call it.*/

function notify(t, m, isModal){
	return new Boxy(m, {title: t, modal: isModal});
}