我想向 jquery.colorbox.js 添加一个元素（想做一些花哨的样式）但我不明白 jquery 的工作方式
链接到彩盒：http ://www.jacklmoore.com/colorbox
当前输出示例：
<div id="cboxOverlay" style="display: block; opacity: 0.9; cursor: pointer;">
</div>
<div id="colorbox" class="" style="display: block; padding-bottom: 42px; padding-right: 42px; top: 0px; left: 456px; position: absolute; width: 871px; height: 646px;">
<div id="cboxWrapper" style="height: 688px; width: 913px;">
...
</div>
</div>
所需的输出示例：
<div id="cboxOverlay" style="display: block; opacity: 0.9; cursor: pointer;">
</div>
<div id="colorbox_totalWrapper">
<div id="colorbox" class="" style="display: block; padding-bottom: 42px; padding-right: 42px; top: 0px; left: 456px; position: absolute; width: 871px; height: 646px;">
<div id="cboxWrapper" style="height: 688px; width: 913px;">
...
</div>
</div>
</div>
当前的jQuery：
defaults = {
transition: "elastic",
speed: 300,
width: false,
initialWidth: "600",
innerWidth: false,
maxWidth: false,
height: false,
initialHeight: "450",
innerHeight: false,
maxHeight: false,
scalePhotos: true,
scrolling: true,
inline: false,
html: false,
iframe: false,
fastIframe: true,
photo: false,
href: false,
title: false,
rel: false,
opacity: 0.9,
preloading: true,
current: "image {current} of {total}",
previous: "previous",
next: "next",
close: "close",
xhrError: "This content failed to load.",
imgError: "This image failed to load.",
open: false,
returnFocus: true,
reposition: true,
loop: true,
slideshow: false,
slideshowAuto: true,
slideshowSpeed: 2500,
slideshowStart: "start slideshow",
slideshowStop: "stop slideshow",
onOpen: false,
onLoad: false,
onComplete: false,
onCleanup: false,
onClosed: false,
overlayClose: true,
escKey: true,
arrowKey: true,
top: false,
bottom: false,
left: false,
right: false,
fixed: false,
data: undefined
},
colorbox = 'colorbox',
prefix = 'cbox',
boxElement = prefix + 'Element',
// Events
event_open = prefix + '_open',
event_load = prefix + '_load',
event_complete = prefix + '_complete',
event_cleanup = prefix + '_cleanup',
event_closed = prefix + '_closed',
event_purge = prefix + '_purge',
// Special Handling for IE
isIE = !$.support.opacity && !$.support.style, // IE7 & IE8
isIE6 = isIE && !window.XMLHttpRequest, // IE6
event_ie6 = prefix + '_IE6',
// Cached jQuery Object Variables
$overlay,
$box,
$wrap,
$content,
$topBorder,
$leftBorder,
$rightBorder,
$bottomBorder,
$related,
$window,
$loaded,
$loadingBay,
$loadingOverlay,
$title,
$current,
$slideshow,
$next,
$prev,
$close,
$groupControls,
settings,
interfaceHeight,
interfaceWidth,
loadedHeight,
loadedWidth,
element,
index,
photo,
open,
active,
closing,
loadingTimer,
publicMethod,
div = "div",
init;
// Convience function for creating new jQuery objects
function $tag(tag, id, css) {
var element = document.createElement(tag);
if (id) {
element.id = prefix + id;
}
if (css) {
element.style.cssText = css;
}
return $(element);
}
// Determine the next and previous members in a group.
function getIndex(increment) {
var
max = $related.length,
newIndex = (index + increment) % max;
return (newIndex < 0) ? max + newIndex : newIndex;
}
// Convert '%' and 'px' values to integers
function setSize(size, dimension) {
return Math.round((/%/.test(size) ? ((dimension === 'x' ? $window.width() : $window.height()) / 100) : 1) * parseInt(size, 10));
}
这个正则表达式。函数 isImage(url) { 返回 settings.photo || /.(gif|png|jpe?g|bmp|ico)((#|\?).*)?$/i.test(url); }
// Assigns function results to their respective properties
function makeSettings() {
var i,
data = $.data(element, colorbox);
if (data == null) {
settings = $.extend({}, defaults);
if (console && console.log) {
console.log('Error: cboxElement missing settings object')
}
} else {
settings = $.extend({}, data);
}
for (i in settings) {
if ($.isFunction(settings[i]) && i.slice(0, 2) !== 'on') { // checks to make sure the function isn't one of the callbacks, they will be handled at the appropriate time.
settings[i] = settings[i].call(element);
}
}
settings.rel = settings.rel || element.rel || 'nofollow';
settings.href = settings.href || $(element).attr('href');
settings.title = settings.title || element.title;
if (typeof settings.href === "string") {
settings.href = $.trim(settings.href);
}
}
function trigger(event, callback) {
$.event.trigger(event);
if (callback) {
callback.call(element);
}
}
// Slideshow functionality
function slideshow() {
var
timeOut,
className = prefix + "Slideshow_",
click = "click." + prefix,
start,
stop,
clear;
if (settings.slideshow && $related[1]) {
start = function () {
$slideshow
.text(settings.slideshowStop)
.unbind(click)
.bind(event_complete, function () {
if (settings.loop || $related[index + 1]) {
timeOut = setTimeout(publicMethod.next, settings.slideshowSpeed);
}
})
.bind(event_load, function () {
clearTimeout(timeOut);
})
.one(click + ' ' + event_cleanup, stop);
$box.removeClass(className + "off").addClass(className + "on");
timeOut = setTimeout(publicMethod.next, settings.slideshowSpeed);
};
stop = function () {
clearTimeout(timeOut);
$slideshow
.text(settings.slideshowStart)
.unbind([event_complete, event_load, event_cleanup, click].join(' '))
.one(click, function () {
publicMethod.next();
start();
});
$box.removeClass(className + "on").addClass(className + "off");
};
if (settings.slideshowAuto) {
start();
} else {
stop();
}
} else {
$box.removeClass(className + "off " + className + "on");
}
}
function launch(target) {
if (!closing) {
element = target;
makeSettings();
$related = $(element);
index = 0;
if (settings.rel !== 'nofollow') {
$related = $('.' + boxElement).filter(function () {
var data = $.data(this, colorbox),
relRelated;
if (data) {
relRelated = data.rel || this.rel;
}
return (relRelated === settings.rel);
});
index = $related.index(element);
// Check direct calls to ColorBox.
if (index === -1) {
$related = $related.add(element);
index = $related.length - 1;
}
}
if (!open) {
open = active = true; // Prevents the page-change action from queuing up if the visitor holds down the left or right keys.
$box.show();
if (settings.returnFocus) {
$(element).blur().one(event_closed, function () {
$(this).focus();
});
}
// +settings.opacity avoids a problem in IE when using non-zero-prefixed-string-values, like '.5'
$overlay.css({"opacity": +settings.opacity, "cursor": settings.overlayClose ? "pointer" : "auto"}).show();
// Opens inital empty ColorBox prior to content being loaded.
settings.w = setSize(settings.initialWidth, 'x');
settings.h = setSize(settings.initialHeight, 'y');
publicMethod.position();
if (isIE6) {
$window.bind('resize.' + event_ie6 + ' scroll.' + event_ie6, function () {
$overlay.css({width: $window.width(), height: $window.height(), top: $window.scrollTop(), left: $window.scrollLeft()});
}).trigger('resize.' + event_ie6);
}
trigger(event_open, settings.onOpen);
$groupControls.add($title).hide();
$close.html(settings.close).show();
}
publicMethod.load(true);
}
}
// ColorBox's markup needs to be added to the DOM prior to being called
// so that the browser will go ahead and load the CSS background images.
function appendHTML() {
if (!$box && document.body) {
init = false;
$window = $(window);
$box = $tag(div).attr({id: colorbox, 'class': isIE ? prefix + (isIE6 ? 'IE6' : 'IE') : ''}).hide();
$overlay = $tag(div, "Overlay", isIE6 ? 'position:absolute' : '').hide();
$wrap = $tag(div, "Wrapper");
$content = $tag(div, "Content").append(
$loaded = $tag(div, "LoadedContent", 'width:0; height:0; overflow:hidden'),
$loadingOverlay = $tag(div, "LoadingOverlay").add($tag(div, "LoadingGraphic")),
$title = $tag(div, "Title"),
$current = $tag(div, "Current"),
$next = $tag(div, "Next"),
$prev = $tag(div, "Previous"),
$slideshow = $tag(div, "Slideshow").bind(event_open, slideshow),
$close = $tag(div, "Close")
);
$wrap.append( // The 3x3 Grid that makes up ColorBox
$tag(div).append(
$tag(div, "TopLeft"),
$topBorder = $tag(div, "TopCenter"),
$tag(div, "TopRight")
),
$tag(div, false, 'clear:left').append(
$leftBorder = $tag(div, "MiddleLeft"),
$content,
$rightBorder = $tag(div, "MiddleRight")
),
$tag(div, false, 'clear:left').append(
$tag(div, "BottomLeft"),
$bottomBorder = $tag(div, "BottomCenter"),
$tag(div, "BottomRight")
)
).find('div div').css({'float': 'left'});
$loadingBay = $tag(div, false, 'position:absolute; width:9999px; visibility:hidden; display:none');
$groupControls = $next.add($prev).add($current).add($slideshow);
$(document.body).append($overlay, $box.append($wrap, $loadingBay));
}
}
// Add ColorBox's event bindings
function addBindings() {
if ($box) {
if (!init) {
init = true;
// Cache values needed for size calculations
interfaceHeight = $topBorder.height() + $bottomBorder.height() + $content.outerHeight(true) - $content.height();//Subtraction needed for IE6
interfaceWidth = $leftBorder.width() + $rightBorder.width() + $content.outerWidth(true) - $content.width();
loadedHeight = $loaded.outerHeight(true);
loadedWidth = $loaded.outerWidth(true);
// Setting padding to remove the need to do size conversions during the animation step.
$box.css({"padding-bottom": interfaceHeight, "padding-right": interfaceWidth});
// Anonymous functions here keep the public method from being cached, thereby allowing them to be redefined on the fly.
$next.click(function () {
publicMethod.next();
});
$prev.click(function () {
publicMethod.prev();
});
$close.click(function () {
publicMethod.close();
});
$overlay.click(function () {
if (settings.overlayClose) {
publicMethod.close();
}
});
// Key Bindings
$(document).bind('keydown.' + prefix, function (e) {
var key = e.keyCode;
if (open && settings.escKey && key === 27) {
e.preventDefault();
publicMethod.close();
}
if (open && settings.arrowKey && $related[1]) {
if (key === 37) {
e.preventDefault();
$prev.click();
} else if (key === 39) {
e.preventDefault();
$next.click();
}
}
});
$('.' + boxElement, document).live('click', function (e) {
// ignore non-left-mouse-clicks and clicks modified with ctrl / command, shift, or alt.
// See: http://jacklmoore.com/notes/click-events/
if (!(e.which > 1 || e.shiftKey || e.altKey || e.metaKey)) {
e.preventDefault();
launch(this);
}
});
}
return true;
}
return false;
}
// Don't do anything if ColorBox already exists.
if ($.colorbox) {
return;
}
// Append the HTML when the DOM loads
$(appendHTML);
// ****************
// PUBLIC FUNCTIONS
// Usage format: $.fn.colorbox.close();
// Usage from within an iframe: parent.$.fn.colorbox.close();
// ****************
publicMethod = $.fn[colorbox] = $[colorbox] = function (options, callback) {
var $this = this;
options = options || {};
appendHTML();
if (addBindings()) {
if (!$this[0]) {
if ($this.selector) { // if a selector was given and it didn't match any elements, go ahead and exit.
return $this;
}
// if no selector was given (ie. $.colorbox()), create a temporary element to work with
$this = $('<a/>');
options.open = true; // assume an immediate open
}
if (callback) {
options.onComplete = callback;
}
$this.each(function () {
$.data(this, colorbox, $.extend({}, $.data(this, colorbox) || defaults, options));
}).addClass(boxElement);
if (($.isFunction(options.open) && options.open.call($this)) || options.open) {
launch($this[0]);
}
}
return $this;
};
publicMethod.position = function (speed, loadedCallback) {
var
top = 0,
left = 0,
offset = $box.offset(),
scrollTop,
scrollLeft;
$window.unbind('resize.' + prefix);
// remove the modal so that it doesn't influence the document width/height
$box.css({top: -9e4, left: -9e4});
scrollTop = $window.scrollTop();
scrollLeft = $window.scrollLeft();
if (settings.fixed && !isIE6) {
offset.top -= scrollTop;
offset.left -= scrollLeft;
$box.css({position: 'fixed'});
} else {
top = scrollTop;
left = scrollLeft;
$box.css({position: 'absolute'});
}
// keeps the top and left positions within the browser's viewport.
if (settings.right !== false) {
left += Math.max($window.width() - settings.w - loadedWidth - interfaceWidth - setSize(settings.right, 'x'), 0);
} else if (settings.left !== false) {
left += setSize(settings.left, 'x');
} else {
left += Math.round(Math.max($window.width() - settings.w - loadedWidth - interfaceWidth, 0) / 2);
}
if (settings.bottom !== false) {
top += Math.max($window.height() - settings.h - loadedHeight - interfaceHeight - setSize(settings.bottom, 'y'), 0);
} else if (settings.top !== false) {
top += setSize(settings.top, 'y');
} else {
top += Math.round(Math.max($window.height() - settings.h - loadedHeight - interfaceHeight, 0) / 2);
}
$box.css({top: offset.top, left: offset.left});
// setting the speed to 0 to reduce the delay between same-sized content.
speed = ($box.width() === settings.w + loadedWidth && $box.height() === settings.h + loadedHeight) ? 0 : speed || 0;
// this gives the wrapper plenty of breathing room so it's floated contents can move around smoothly,
// but it has to be shrank down around the size of div#colorbox when it's done. If not,
// it can invoke an obscure IE bug when using iframes.
$wrap[0].style.width = $wrap[0].style.height = "9999px";
function modalDimensions(that) {
$topBorder[0].style.width = $bottomBorder[0].style.width = $content[0].style.width = that.style.width;
$content[0].style.height = $leftBorder[0].style.height = $rightBorder[0].style.height = that.style.height;
}
$box.dequeue().animate({width: settings.w + loadedWidth, height: settings.h + loadedHeight, top: top, left: left}, {
duration: speed,
complete: function () {
modalDimensions(this);
active = false;
// shrink the wrapper down to exactly the size of colorbox to avoid a bug in IE's iframe implementation.
$wrap[0].style.width = (settings.w + loadedWidth + interfaceWidth) + "px";
$wrap[0].style.height = (settings.h + loadedHeight + interfaceHeight) + "px";
if (settings.reposition) {
setTimeout(function () { // small delay before binding onresize due to an IE8 bug.
$window.bind('resize.' + prefix, publicMethod.position);
}, 1);
}
if (loadedCallback) {
loadedCallback();
}
},
step: function () {
modalDimensions(this);
}
});
};
publicMethod.resize = function (options) {
if (open) {
options = options || {};
if (options.width) {
settings.w = setSize(options.width, 'x') - loadedWidth - interfaceWidth;
}
if (options.innerWidth) {
settings.w = setSize(options.innerWidth, 'x');
}
$loaded.css({width: settings.w});
if (options.height) {
settings.h = setSize(options.height, 'y') - loadedHeight - interfaceHeight;
}
if (options.innerHeight) {
settings.h = setSize(options.innerHeight, 'y');
}
if (!options.innerHeight && !options.height) {
$loaded.css({height: "auto"});
settings.h = $loaded.height();
}
$loaded.css({height: settings.h});
publicMethod.position(settings.transition === "none" ? 0 : settings.speed);
}
};
publicMethod.prep = function (object) {
if (!open) {
return;
}
var callback, speed = settings.transition === "none" ? 0 : settings.speed;
$loaded.remove();
$loaded = $tag(div, 'LoadedContent').append(object);
function getWidth() {
settings.w = settings.w || $loaded.width();
settings.w = settings.mw && settings.mw < settings.w ? settings.mw : settings.w;
return settings.w;
}
function getHeight() {
settings.h = settings.h || $loaded.height();
settings.h = settings.mh && settings.mh < settings.h ? settings.mh : settings.h;
return settings.h;
}
$loaded.hide()
.appendTo($loadingBay.show())// content has to be appended to the DOM for accurate size calculations.
.css({width: getWidth(), overflow: settings.scrolling ? 'auto' : 'hidden'})
.css({height: getHeight()})// sets the height independently from the width in case the new width influences the value of height.
.prependTo($content);
$loadingBay.hide();
// floating the IMG removes the bottom line-height and fixed a problem where IE miscalculates the width of the parent element as 100% of the document width.
//$(photo).css({'float': 'none', marginLeft: 'auto', marginRight: 'auto'});
$(photo).css({'float': 'none'});
// Hides SELECT elements in IE6 because they would otherwise sit on top of the overlay.
if (isIE6) {
$('select').not($box.find('select')).filter(function () {
return this.style.visibility !== 'hidden';
}).css({'visibility': 'hidden'}).one(event_cleanup, function () {
this.style.visibility = 'inherit';
});
}
callback = function () {
var preload,
i,
total = $related.length,
iframe,
frameBorder = 'frameBorder',
allowTransparency = 'allowTransparency',
complete,
src,
img,
data;
if (!open) {
return;
}
function removeFilter() {
if (isIE) {
$box[0].style.removeAttribute('filter');
}
}
complete = function () {
clearTimeout(loadingTimer);
$loadingOverlay.hide();
trigger(event_complete, settings.onComplete);
};
if (isIE) {
//This fadeIn helps the bicubic resampling to kick-in.
if (photo) {
$loaded.fadeIn(100);
}
}
$title.html(settings.title).add($loaded).show();
if (total > 1) { // handle grouping
if (typeof settings.current === "string") {
$current.html(settings.current.replace('{current}', index + 1).replace('{total}', total)).show();
}
$next[(settings.loop || index < total - 1) ? "show" : "hide"]().html(settings.next);
$prev[(settings.loop || index) ? "show" : "hide"]().html(settings.previous);
if (settings.slideshow) {
$slideshow.show();
}
// Preloads images within a rel group
if (settings.preloading) {
preload = [
getIndex(-1),
getIndex(1)
];
while (i = $related[preload.pop()]) {
data = $.data(i, colorbox);
if (data && data.href) {
src = data.href;
if ($.isFunction(src)) {
src = src.call(i);
}
} else {
src = i.href;
}
if (isImage(src)) {
img = new Image();
img.src = src;
}
}
}
} else {
$groupControls.hide();
}
if (settings.iframe) {
iframe = $tag('iframe')[0];
if (frameBorder in iframe) {
iframe[frameBorder] = 0;
}
if (allowTransparency in iframe) {
iframe[allowTransparency] = "true";
}
// give the iframe a unique name to prevent caching
iframe.name = prefix + (+new Date());
if (settings.fastIframe) {
complete();
} else {
$(iframe).one('load', complete);
}
iframe.src = settings.href;
if (!settings.scrolling) {
iframe.scrolling = "no";
}
$(iframe).addClass(prefix + 'Iframe').appendTo($loaded).one(event_purge, function () {
iframe.src = "//about:blank";
});
} else {
complete();
}
if (settings.transition === 'fade') {
$box.fadeTo(speed, 1, removeFilter);
} else {
removeFilter();
}
};
if (settings.transition === 'fade') {
$box.fadeTo(speed, 0, function () {
publicMethod.position(0, callback);
});
} else {
publicMethod.position(speed, callback);
}
};
publicMethod.load = function (launched) {
var href, setResize, prep = publicMethod.prep;
active = true;
photo = false;
element = $related[index];
if (!launched) {
makeSettings();
}
trigger(event_purge);
trigger(event_load, settings.onLoad);
settings.h = settings.height ?
setSize(settings.height, 'y') - loadedHeight - interfaceHeight :
settings.innerHeight && setSize(settings.innerHeight, 'y');
settings.w = settings.width ?
setSize(settings.width, 'x') - loadedWidth - interfaceWidth :
settings.innerWidth && setSize(settings.innerWidth, 'x');
// Sets the minimum dimensions for use in image scaling
settings.mw = settings.w;
settings.mh = settings.h;
// Re-evaluate the minimum width and height based on maxWidth and maxHeight values.
// If the width or height exceed the maxWidth or maxHeight, use the maximum values instead.
if (settings.maxWidth) {
settings.mw = setSize(settings.maxWidth, 'x') - loadedWidth - interfaceWidth;
settings.mw = settings.w && settings.w < settings.mw ? settings.w : settings.mw;
}
if (settings.maxHeight) {
settings.mh = setSize(settings.maxHeight, 'y') - loadedHeight - interfaceHeight;
settings.mh = settings.h && settings.h < settings.mh ? settings.h : settings.mh;
}
href = settings.href;
loadingTimer = setTimeout(function () {
$loadingOverlay.show();
}, 100);
if (settings.inline) {
// Inserts an empty placeholder where inline content is being pulled from.
// An event is bound to put inline content back when ColorBox closes or loads new content.
$tag(div).hide().insertBefore($(href)[0]).one(event_purge, function () {
$(this).replaceWith($loaded.children());
});
prep($(href));
} else if (settings.iframe) {
// IFrame element won't be added to the DOM until it is ready to be displayed,
// to avoid problems with DOM-ready JS that might be trying to run in that iframe.
prep(" ");
} else if (settings.html) {
prep(settings.html);
} else if (isImage(href)) {
$(photo = new Image())
.addClass(prefix + 'Photo')
.error(function () {
settings.title = false;
prep($tag(div, 'Error').html(settings.imgError));
})
.load(function () {
var percent;
photo.onload = null; //stops animated gifs from firing the onload repeatedly.
if (settings.scalePhotos) {
setResize = function () {
photo.height -= photo.height * percent;
photo.width -= photo.width * percent;
};
if (settings.mw && photo.width > settings.mw) {
percent = (photo.width - settings.mw) / photo.width;
setResize();
}
if (settings.mh && photo.height > settings.mh) {
percent = (photo.height - settings.mh) / photo.height;
setResize();
}
}
if (settings.h) {
photo.style.marginTop = Math.max(settings.h - photo.height, 0) / 2 + 'px';
}
if ($related[1] && (settings.loop || $related[index + 1])) {
photo.style.cursor = 'pointer';
photo.onclick = function () {
publicMethod.next();
};
}
if (isIE) {
photo.style.msInterpolationMode = 'bicubic';
}
setTimeout(function () { // A pause because Chrome will sometimes report a 0 by 0 size otherwise.
prep(photo);
}, 1);
});
setTimeout(function () { // A pause because Opera 10.6+ will sometimes not run the onload function otherwise.
photo.src = href;
}, 1);
} else if (href) {
$loadingBay.load(href, settings.data, function (data, status, xhr) {
prep(status === 'error' ? $tag(div, 'Error').html(settings.xhrError) : $(this).contents());
});
}
};
// Navigates to the next page/image in a set.
publicMethod.next = function () {
if (!active && $related[1] && (settings.loop || $related[index + 1])) {
index = getIndex(1);
publicMethod.load();
}
};
publicMethod.prev = function () {
if (!active && $related[1] && (settings.loop || index)) {
index = getIndex(-1);
publicMethod.load();
}
};
// Note: to use this within an iframe use the following format: parent.$.fn.colorbox.close();
publicMethod.close = function () {
if (open && !closing) {
closing = true;
open = false;
trigger(event_cleanup, settings.onCleanup);
$window.unbind('.' + prefix + ' .' + event_ie6);
$overlay.fadeTo(200, 0);
$box.stop().fadeTo(300, 0, function () {
$box.add($overlay).css({'opacity': 1, cursor: 'auto'}).hide();
trigger(event_purge);
$loaded.remove();
setTimeout(function () {
closing = false;
trigger(event_closed, settings.onClosed);
}, 1);
});
}
};
// Removes changes ColorBox made to the document, but does not remove the plugin
// from jQuery.
publicMethod.remove = function () {
$([]).add($box).add($overlay).remove();
$box = null;
$('.' + boxElement)
.removeData(colorbox)
.removeClass(boxElement)
.die();
};
// A method for fetching the current element ColorBox is referencing.
// returns a jQuery object.
publicMethod.element = function () {
return $(element);
}
;
publicMethod.settings = defaults;
}(jQuery, document, this));