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comparison PalantirExplorer/libs/slimbox2.js @ 0:3959d33612cc

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 19 Jul 2012 14:32:22 +0200
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1 /*!
2 Slimbox v2.04 - The ultimate lightweight Lightbox clone for jQuery
3 (c) 2007-2010 Christophe Beyls <http://www.digitalia.be>
4 MIT-style license.
5 */
6
7 (function($) {
8
9 // Global variables, accessible to Slimbox only
10 var win = $(window), options, images, activeImage = -1, activeURL, prevImage, nextImage, compatibleOverlay, middle, centerWidth, centerHeight,
11 ie6 = !window.XMLHttpRequest, hiddenElements = [], documentElement = document.documentElement,
12
13 // Preload images
14 preload = {}, preloadPrev = new Image(), preloadNext = new Image(),
15
16 // DOM elements
17 overlay, center, image, sizer, prevLink, nextLink, bottomContainer, bottom, caption, number;
18
19 /*
20 Initialization
21 */
22
23 $(function() {
24 // Append the Slimbox HTML code at the bottom of the document
25 $("body").append(
26 $([
27 overlay = $('<div id="lbOverlay" />')[0],
28 center = $('<div id="lbCenter" />')[0],
29 bottomContainer = $('<div id="lbBottomContainer" />')[0]
30 ]).css("display", "none")
31 );
32
33 image = $('<div id="lbImage" />').appendTo(center).append(
34 sizer = $('<div style="position: relative;" />').append([
35 prevLink = $('<a id="lbPrevLink" href="#" />').click(previous)[0],
36 nextLink = $('<a id="lbNextLink" href="#" />').click(next)[0]
37 ])[0]
38 )[0];
39
40 bottom = $('<div id="lbBottom" />').appendTo(bottomContainer).append([
41 $('<a id="lbCloseLink" href="#" />').add(overlay).click(close)[0],
42 caption = $('<div id="lbCaption" />')[0],
43 number = $('<div id="lbNumber" />')[0],
44 $('<div style="clear: both;" />')[0]
45 ])[0];
46 });
47
48
49 /*
50 API
51 */
52
53 // Open Slimbox with the specified parameters
54 $.slimbox = function(_images, startImage, _options) {
55 options = $.extend({
56 loop: false, // Allows to navigate between first and last images
57 overlayOpacity: 0.8, // 1 is opaque, 0 is completely transparent (change the color in the CSS file)
58 overlayFadeDuration: 400, // Duration of the overlay fade-in and fade-out animations (in milliseconds)
59 resizeDuration: 400, // Duration of each of the box resize animations (in milliseconds)
60 resizeEasing: "swing", // "swing" is jQuery's default easing
61 initialWidth: 250, // Initial width of the box (in pixels)
62 initialHeight: 250, // Initial height of the box (in pixels)
63 imageFadeDuration: 400, // Duration of the image fade-in animation (in milliseconds)
64 captionAnimationDuration: 400, // Duration of the caption animation (in milliseconds)
65 counterText: "Image {x} of {y}", // Translate or change as you wish, or set it to false to disable counter text for image groups
66 closeKeys: [27, 88, 67], // Array of keycodes to close Slimbox, default: Esc (27), 'x' (88), 'c' (67)
67 previousKeys: [37, 80], // Array of keycodes to navigate to the previous image, default: Left arrow (37), 'p' (80)
68 nextKeys: [39, 78] // Array of keycodes to navigate to the next image, default: Right arrow (39), 'n' (78)
69 }, _options);
70
71 // The function is called for a single image, with URL and Title as first two arguments
72 if (typeof _images == "string") {
73 _images = [[_images, startImage]];
74 startImage = 0;
75 }
76
77 middle = win.scrollTop() + (win.height() / 2);
78 centerWidth = options.initialWidth;
79 centerHeight = options.initialHeight;
80 $(center).css({top: Math.max(0, middle - (centerHeight / 2)), width: centerWidth, height: centerHeight, marginLeft: -centerWidth/2}).show();
81 compatibleOverlay = ie6 || (overlay.currentStyle && (overlay.currentStyle.position != "fixed"));
82 if (compatibleOverlay) overlay.style.position = "absolute";
83 $(overlay).css("opacity", options.overlayOpacity).fadeIn(options.overlayFadeDuration);
84 position();
85 setup(1);
86
87 images = _images;
88 options.loop = options.loop && (images.length > 1);
89 return changeImage(startImage);
90 };
91
92 /*
93 options: Optional options object, see jQuery.slimbox()
94 linkMapper: Optional function taking a link DOM element and an index as arguments and returning an array containing 2 elements:
95 the image URL and the image caption (may contain HTML)
96 linksFilter: Optional function taking a link DOM element and an index as arguments and returning true if the element is part of
97 the image collection that will be shown on click, false if not. "this" refers to the element that was clicked.
98 This function must always return true when the DOM element argument is "this".
99 */
100 $.fn.slimbox = function(_options, linkMapper, linksFilter) {
101 linkMapper = linkMapper || function(el) {
102 return [el.href, el.title];
103 };
104
105 linksFilter = linksFilter || function() {
106 return true;
107 };
108
109 var links = this;
110
111 return links.unbind("click").click(function() {
112 // Build the list of images that will be displayed
113 var link = this, startIndex = 0, filteredLinks, i = 0, length;
114 filteredLinks = $.grep(links, function(el, i) {
115 return linksFilter.call(link, el, i);
116 });
117
118 // We cannot use jQuery.map() because it flattens the returned array
119 for (length = filteredLinks.length; i < length; ++i) {
120 if (filteredLinks[i] == link) startIndex = i;
121 filteredLinks[i] = linkMapper(filteredLinks[i], i);
122 }
123
124 return $.slimbox(filteredLinks, startIndex, _options);
125 });
126 };
127
128
129 /*
130 Internal functions
131 */
132
133 function position() {
134 var l = win.scrollLeft(), w = win.width();
135 $([center, bottomContainer]).css("left", l + (w / 2));
136 if (compatibleOverlay) $(overlay).css({left: l, top: win.scrollTop(), width: w, height: win.height()});
137 }
138
139 function setup(open) {
140 if (open) {
141 $("object").add(ie6 ? "select" : "embed").each(function(index, el) {
142 hiddenElements[index] = [el, el.style.visibility];
143 el.style.visibility = "hidden";
144 });
145 } else {
146 $.each(hiddenElements, function(index, el) {
147 el[0].style.visibility = el[1];
148 });
149 hiddenElements = [];
150 }
151 var fn = open ? "bind" : "unbind";
152 win[fn]("scroll resize", position);
153 $(document)[fn]("keydown", keyDown);
154 }
155
156 function keyDown(event) {
157 var code = event.keyCode, fn = $.inArray;
158 // Prevent default keyboard action (like navigating inside the page)
159 return (fn(code, options.closeKeys) >= 0) ? close()
160 : (fn(code, options.nextKeys) >= 0) ? next()
161 : (fn(code, options.previousKeys) >= 0) ? previous()
162 : false;
163 }
164
165 function previous() {
166 return changeImage(prevImage);
167 }
168
169 function next() {
170 return changeImage(nextImage);
171 }
172
173 function changeImage(imageIndex) {
174 if (imageIndex >= 0) {
175 activeImage = imageIndex;
176 activeURL = images[activeImage][0];
177 prevImage = (activeImage || (options.loop ? images.length : 0)) - 1;
178 nextImage = ((activeImage + 1) % images.length) || (options.loop ? 0 : -1);
179
180 stop();
181 center.className = "lbLoading";
182
183 preload = new Image();
184 preload.onload = animateBox;
185 preload.src = activeURL;
186 }
187
188 return false;
189 }
190
191 function animateBox() {
192 center.className = "";
193 $(image).css({backgroundImage: "url(" + activeURL + ")", visibility: "hidden", display: "" });
194 $(sizer).width(preload.width);
195 $([sizer, prevLink, nextLink]).height(preload.height);
196
197 $(caption).html(images[activeImage][1] || "");
198 $(number).html((((images.length > 1) && options.counterText) || "").replace(/{x}/, activeImage + 1).replace(/{y}/, images.length));
199
200 if (prevImage >= 0) preloadPrev.src = images[prevImage][0];
201 if (nextImage >= 0) preloadNext.src = images[nextImage][0];
202
203 centerWidth = image.offsetWidth;
204 centerHeight = image.offsetHeight;
205 var top = Math.max(0, middle - (centerHeight / 2));
206 if (center.offsetHeight != centerHeight) {
207 $(center).animate({height: centerHeight, top: top}, options.resizeDuration, options.resizeEasing);
208 }
209 if (center.offsetWidth != centerWidth) {
210 $(center).animate({width: centerWidth, marginLeft: -centerWidth/2}, options.resizeDuration, options.resizeEasing);
211 }
212 $(center).queue(function() {
213 $(bottomContainer).css({width: centerWidth, top: top + centerHeight, marginLeft: -centerWidth/2, visibility: "hidden", display: ""});
214 animateCaption();
215 $(image).css({display: "none", visibility: "", opacity: ""}).fadeIn(options.imageFadeDuration, animateCaption);
216 });
217 }
218
219 function animateCaption() {
220 if (prevImage >= 0) $(prevLink).show();
221 if (nextImage >= 0) $(nextLink).show();
222 $(bottom).css("marginTop", -bottom.offsetHeight).animate({marginTop: 0}, options.captionAnimationDuration);
223 bottomContainer.style.visibility = "";
224 }
225
226 function stop() {
227 preload.onload = null;
228 preload.src = preloadPrev.src = preloadNext.src = activeURL;
229 $([center, image, bottom]).stop(true);
230 $([prevLink, nextLink, image, bottomContainer]).hide();
231 }
232
233 function close() {
234 if (activeImage >= 0) {
235 stop();
236 activeImage = prevImage = nextImage = -1;
237 $(center).hide();
238 $(overlay).stop().fadeOut(options.overlayFadeDuration, setup);
239 }
240
241 return false;
242 }
243
244 })(jQuery);