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Block UI when loading initial archive page

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This commit is contained in:
Wesley Moore 2010-02-02 13:30:14 +11:00
parent d51512462d
commit bb2c46a19e
3 changed files with 489 additions and 3 deletions
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1
layouts/articles.html
View file

@ -4,6 +4,7 @@
<%= render 'head_common' %>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.0/jquery.min.js" type="text/javascript"></script>
<script src="/js/jquery.ba-bbq.min.js" type="text/javascript" charset="utf-8"></script>
<script src="/js/jquery.blockUI.js" type="text/javascript" charset="utf-8"></script>
<script src="/js/mojo.js" type="text/javascript" charset="utf-8"></script>
<script src="/js/articles.js" type="text/javascript" charset="utf-8"></script>
</head>

14
output/js/articles.js
View file

@ -29,7 +29,7 @@
function articles_loaded(data) {
articles = data;
jQuery(function() {
$(window).bind('hashchange', function(e) {
$(window).bind('hashchange', function(e, first_time) {
// Get the hash (fragment) as a string, with any leading # removed. Note that
// in jQuery 1.4, you should use e.fragment instead of $.param.fragment().
var page;
@ -42,9 +42,16 @@
update_pagination_controls(1);
return false;
}
var container = $('ul.articles');
if(first_time && page != 1) {
container.block({
message: '<span>Loading</span>',
css: { border: '3px solid #1c1c1c' }
});
}
// Generate the items
var container = $('ul.articles');
container.empty();
var i = (page - 1) * per_page;
for(; i < page * per_page && i < articles.length; i++) {
@ -63,12 +70,13 @@
container.append(li);
}
if(first_time && page != 1) container.unblock();
update_pagination_controls(page);
});
// Since the event is only triggered when the hash changes, we need to trigger
// the event now, to handle the hash the page may have loaded with.
$(window).trigger( 'hashchange' );
$(window).trigger('hashchange', true);
$('.pagination').slideDown('fast');
});
};

477
output/js/jquery.blockUI.js Normal file
View file

@ -0,0 +1,477 @@
/*!
* jQuery blockUI plugin
* Version 2.31 (06-JAN-2010)
* @requires jQuery v1.2.3 or later
*
* Examples at: http://malsup.com/jquery/block/
* Copyright (c) 2007-2008 M. Alsup
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* Thanks to Amir-Hossein Sobhi for some excellent contributions!
*/
;(function($) {
if (/1\.(0|1|2)\.(0|1|2)/.test($.fn.jquery) || /^1.1/.test($.fn.jquery)) {
alert('blockUI requires jQuery v1.2.3 or later! You are using v' + $.fn.jquery);
return;
}
$.fn._fadeIn = $.fn.fadeIn;
var noOp = function() {};
// this bit is to ensure we don't call setExpression when we shouldn't (with extra muscle to handle
// retarded userAgent strings on Vista)
var mode = document.documentMode || 0;
var setExpr = $.browser.msie && (($.browser.version < 8 && !mode) || mode < 8);
var ie6 = $.browser.msie && /MSIE 6.0/.test(navigator.userAgent) && !mode;
// global $ methods for blocking/unblocking the entire page
$.blockUI = function(opts) { install(window, opts); };
$.unblockUI = function(opts) { remove(window, opts); };
// convenience method for quick growl-like notifications (http://www.google.com/search?q=growl)
$.growlUI = function(title, message, timeout, onClose) {
var $m = $('<div class="growlUI"></div>');
if (title) $m.append('<h1>'+title+'</h1>');
if (message) $m.append('<h2>'+message+'</h2>');
if (timeout == undefined) timeout = 3000;
$.blockUI({
message: $m, fadeIn: 700, fadeOut: 1000, centerY: false,
timeout: timeout, showOverlay: false,
onUnblock: onClose,
css: $.blockUI.defaults.growlCSS
});
};
// plugin method for blocking element content
$.fn.block = function(opts) {
return this.unblock({ fadeOut: 0 }).each(function() {
if ($.css(this,'position') == 'static')
this.style.position = 'relative';
if ($.browser.msie)
this.style.zoom = 1; // force 'hasLayout'
install(this, opts);
});
};
// plugin method for unblocking element content
$.fn.unblock = function(opts) {
return this.each(function() {
remove(this, opts);
});
};
$.blockUI.version = 2.31; // 2nd generation blocking at no extra cost!
// override these in your code to change the default behavior and style
$.blockUI.defaults = {
// message displayed when blocking (use null for no message)
message: '<h1>Please wait...</h1>',
title: null, // title string; only used when theme == true
draggable: true, // only used when theme == true (requires jquery-ui.js to be loaded)
theme: false, // set to true to use with jQuery UI themes
// styles for the message when blocking; if you wish to disable
// these and use an external stylesheet then do this in your code:
// $.blockUI.defaults.css = {};
css: {
padding: 0,
margin: 0,
width: '30%',
top: '40%',
left: '35%',
textAlign: 'center',
color: '#000',
border: '3px solid #aaa',
backgroundColor:'#fff',
cursor: 'wait'
},
// minimal style set used when themes are used
themedCSS: {
width: '30%',
top: '40%',
left: '35%'
},
// styles for the overlay
overlayCSS: {
backgroundColor: '#000',
opacity: 0.6,
cursor: 'wait'
},
// styles applied when using $.growlUI
growlCSS: {
width: '350px',
top: '10px',
left: '',
right: '10px',
border: 'none',
padding: '5px',
opacity: 0.6,
cursor: 'default',
color: '#fff',
backgroundColor: '#000',
'-webkit-border-radius': '10px',
'-moz-border-radius': '10px'
},
// IE issues: 'about:blank' fails on HTTPS and javascript:false is s-l-o-w
// (hat tip to Jorge H. N. de Vasconcelos)
iframeSrc: /^https/i.test(window.location.href || '') ? 'javascript:false' : 'about:blank',
// force usage of iframe in non-IE browsers (handy for blocking applets)
forceIframe: false,
// z-index for the blocking overlay
baseZ: 1000,
// set these to true to have the message automatically centered
centerX: true, // <-- only effects element blocking (page block controlled via css above)
centerY: true,
// allow body element to be stetched in ie6; this makes blocking look better
// on "short" pages. disable if you wish to prevent changes to the body height
allowBodyStretch: true,
// enable if you want key and mouse events to be disabled for content that is blocked
bindEvents: true,
// be default blockUI will supress tab navigation from leaving blocking content
// (if bindEvents is true)
constrainTabKey: true,
// fadeIn time in millis; set to 0 to disable fadeIn on block
fadeIn: 200,
// fadeOut time in millis; set to 0 to disable fadeOut on unblock
fadeOut: 400,
// time in millis to wait before auto-unblocking; set to 0 to disable auto-unblock
timeout: 0,
// disable if you don't want to show the overlay
showOverlay: true,
// if true, focus will be placed in the first available input field when
// page blocking
focusInput: true,
// suppresses the use of overlay styles on FF/Linux (due to performance issues with opacity)
applyPlatformOpacityRules: true,
// callback method invoked when fadeIn has completed and blocking message is visible
onBlock: null,
// callback method invoked when unblocking has completed; the callback is
// passed the element that has been unblocked (which is the window object for page
// blocks) and the options that were passed to the unblock call:
// onUnblock(element, options)
onUnblock: null,
// don't ask; if you really must know: http://groups.google.com/group/jquery-en/browse_thread/thread/36640a8730503595/2f6a79a77a78e493#2f6a79a77a78e493
quirksmodeOffsetHack: 4
};
// private data and functions follow...
var pageBlock = null;
var pageBlockEls = [];
function install(el, opts) {
var full = (el == window);
var msg = opts && opts.message !== undefined ? opts.message : undefined;
opts = $.extend({}, $.blockUI.defaults, opts || {});
opts.overlayCSS = $.extend({}, $.blockUI.defaults.overlayCSS, opts.overlayCSS || {});
var css = $.extend({}, $.blockUI.defaults.css, opts.css || {});
var themedCSS = $.extend({}, $.blockUI.defaults.themedCSS, opts.themedCSS || {});
msg = msg === undefined ? opts.message : msg;
// remove the current block (if there is one)
if (full && pageBlock)
remove(window, {fadeOut:0});
// if an existing element is being used as the blocking content then we capture
// its current place in the DOM (and current display style) so we can restore
// it when we unblock
if (msg && typeof msg != 'string' && (msg.parentNode || msg.jquery)) {
var node = msg.jquery ? msg[0] : msg;
var data = {};
$(el).data('blockUI.history', data);
data.el = node;
data.parent = node.parentNode;
data.display = node.style.display;
data.position = node.style.position;
if (data.parent)
data.parent.removeChild(node);
}
var z = opts.baseZ;
// blockUI uses 3 layers for blocking, for simplicity they are all used on every platform;
// layer1 is the iframe layer which is used to supress bleed through of underlying content
// layer2 is the overlay layer which has opacity and a wait cursor (by default)
// layer3 is the message content that is displayed while blocking
var lyr1 = ($.browser.msie || opts.forceIframe)
? $('<iframe class="blockUI" style="z-index:'+ (z++) +';display:none;border:none;margin:0;padding:0;position:absolute;width:100%;height:100%;top:0;left:0" src="'+opts.iframeSrc+'"></iframe>')
: $('<div class="blockUI" style="display:none"></div>');
var lyr2 = $('<div class="blockUI blockOverlay" style="z-index:'+ (z++) +';display:none;border:none;margin:0;padding:0;width:100%;height:100%;top:0;left:0"></div>');
var lyr3;
if (opts.theme && full) {
var s = '<div class="blockUI blockMsg blockPage ui-dialog ui-widget ui-corner-all" style="z-index:'+z+';display:none;position:fixed">' +
'<div class="ui-widget-header ui-dialog-titlebar blockTitle">'+(opts.title || '&nbsp;')+'</div>' +
'<div class="ui-widget-content ui-dialog-content"></div>' +
'</div>';
lyr3 = $(s);
}
else {
lyr3 = full ? $('<div class="blockUI blockMsg blockPage" style="z-index:'+z+';display:none;position:fixed"></div>')
: $('<div class="blockUI blockMsg blockElement" style="z-index:'+z+';display:none;position:absolute"></div>');
}
// if we have a message, style it
if (msg) {
if (opts.theme) {
lyr3.css(themedCSS);
lyr3.addClass('ui-widget-content');
}
else
lyr3.css(css);
}
// style the overlay
if (!opts.applyPlatformOpacityRules || !($.browser.mozilla && /Linux/.test(navigator.platform)))
lyr2.css(opts.overlayCSS);
lyr2.css('position', full ? 'fixed' : 'absolute');
// make iframe layer transparent in IE
if ($.browser.msie || opts.forceIframe)
lyr1.css('opacity',0.0);
//$([lyr1[0],lyr2[0],lyr3[0]]).appendTo(full ? 'body' : el);
var layers = [lyr1,lyr2,lyr3], $par = full ? $('body') : $(el);
$.each(layers, function() {
this.appendTo($par);
});
if (opts.theme && opts.draggable && $.fn.draggable) {
lyr3.draggable({
handle: '.ui-dialog-titlebar',
cancel: 'li'
});
}
// ie7 must use absolute positioning in quirks mode and to account for activex issues (when scrolling)
var expr = setExpr && (!$.boxModel || $('object,embed', full ? null : el).length > 0);
if (ie6 || expr) {
// give body 100% height
if (full && opts.allowBodyStretch && $.boxModel)
$('html,body').css('height','100%');
// fix ie6 issue when blocked element has a border width
if ((ie6 || !$.boxModel) && !full) {
var t = sz(el,'borderTopWidth'), l = sz(el,'borderLeftWidth');
var fixT = t ? '(0 - '+t+')' : 0;
var fixL = l ? '(0 - '+l+')' : 0;
}
// simulate fixed position
$.each([lyr1,lyr2,lyr3], function(i,o) {
var s = o[0].style;
s.position = 'absolute';
if (i < 2) {
full ? s.setExpression('height','Math.max(document.body.scrollHeight, document.body.offsetHeight) - (jQuery.boxModel?0:'+opts.quirksmodeOffsetHack+') + "px"')
: s.setExpression('height','this.parentNode.offsetHeight + "px"');
full ? s.setExpression('width','jQuery.boxModel && document.documentElement.clientWidth || document.body.clientWidth + "px"')
: s.setExpression('width','this.parentNode.offsetWidth + "px"');
if (fixL) s.setExpression('left', fixL);
if (fixT) s.setExpression('top', fixT);
}
else if (opts.centerY) {
if (full) s.setExpression('top','(document.documentElement.clientHeight || document.body.clientHeight) / 2 - (this.offsetHeight / 2) + (blah = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop) + "px"');
s.marginTop = 0;
}
else if (!opts.centerY && full) {
var top = (opts.css && opts.css.top) ? parseInt(opts.css.top) : 0;
var expression = '((document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop) + '+top+') + "px"';
s.setExpression('top',expression);
}
});
}
// show the message
if (msg) {
if (opts.theme)
lyr3.find('.ui-widget-content').append(msg);
else
lyr3.append(msg);
if (msg.jquery || msg.nodeType)
$(msg).show();
}
if (($.browser.msie || opts.forceIframe) && opts.showOverlay)
lyr1.show(); // opacity is zero
if (opts.fadeIn) {
var cb = opts.onBlock ? opts.onBlock : noOp;
var cb1 = (opts.showOverlay && !msg) ? cb : noOp;
var cb2 = msg ? cb : noOp;
if (opts.showOverlay)
lyr2._fadeIn(opts.fadeIn, cb1);
if (msg)
lyr3._fadeIn(opts.fadeIn, cb2);
}
else {
if (opts.showOverlay)
lyr2.show();
if (msg)
lyr3.show();
if (opts.onBlock)
opts.onBlock();
}
// bind key and mouse events
bind(1, el, opts);
if (full) {
pageBlock = lyr3[0];
pageBlockEls = $(':input:enabled:visible',pageBlock);
if (opts.focusInput)
setTimeout(focus, 20);
}
else
center(lyr3[0], opts.centerX, opts.centerY);
if (opts.timeout) {
// auto-unblock
var to = setTimeout(function() {
full ? $.unblockUI(opts) : $(el).unblock(opts);
}, opts.timeout);
$(el).data('blockUI.timeout', to);
}
};
// remove the block
function remove(el, opts) {
var full = (el == window);
var $el = $(el);
var data = $el.data('blockUI.history');
var to = $el.data('blockUI.timeout');
if (to) {
clearTimeout(to);
$el.removeData('blockUI.timeout');
}
opts = $.extend({}, $.blockUI.defaults, opts || {});
bind(0, el, opts); // unbind events
var els;
if (full) // crazy selector to handle odd field errors in ie6/7
els = $('body').children().filter('.blockUI').add('body > .blockUI');
else
els = $('.blockUI', el);
if (full)
pageBlock = pageBlockEls = null;
if (opts.fadeOut) {
els.fadeOut(opts.fadeOut);
setTimeout(function() { reset(els,data,opts,el); }, opts.fadeOut);
}
else
reset(els, data, opts, el);
};
// move blocking element back into the DOM where it started
function reset(els,data,opts,el) {
els.each(function(i,o) {
// remove via DOM calls so we don't lose event handlers
if (this.parentNode)
this.parentNode.removeChild(this);
});
if (data && data.el) {
data.el.style.display = data.display;
data.el.style.position = data.position;
if (data.parent)
data.parent.appendChild(data.el);
$(el).removeData('blockUI.history');
}
if (typeof opts.onUnblock == 'function')
opts.onUnblock(el,opts);
};
// bind/unbind the handler
function bind(b, el, opts) {
var full = el == window, $el = $(el);
// don't bother unbinding if there is nothing to unbind
if (!b && (full && !pageBlock || !full && !$el.data('blockUI.isBlocked')))
return;
if (!full)
$el.data('blockUI.isBlocked', b);
// don't bind events when overlay is not in use or if bindEvents is false
if (!opts.bindEvents || (b && !opts.showOverlay))
return;
// bind anchors and inputs for mouse and key events
var events = 'mousedown mouseup keydown keypress';
b ? $(document).bind(events, opts, handler) : $(document).unbind(events, handler);
// former impl...
// var $e = $('a,:input');
// b ? $e.bind(events, opts, handler) : $e.unbind(events, handler);
};
// event handler to suppress keyboard/mouse events when blocking
function handler(e) {
// allow tab navigation (conditionally)
if (e.keyCode && e.keyCode == 9) {
if (pageBlock && e.data.constrainTabKey) {
var els = pageBlockEls;
var fwd = !e.shiftKey && e.target == els[els.length-1];
var back = e.shiftKey && e.target == els[0];
if (fwd || back) {
setTimeout(function(){focus(back)},10);
return false;
}
}
}
// allow events within the message content
if ($(e.target).parents('div.blockMsg').length > 0)
return true;
// allow events for content that is not being blocked
return $(e.target).parents().children().filter('div.blockUI').length == 0;
};
function focus(back) {
if (!pageBlockEls)
return;
var e = pageBlockEls[back===true ? pageBlockEls.length-1 : 0];
if (e)
e.focus();
};
function center(el, x, y) {
var p = el.parentNode, s = el.style;
var l = ((p.offsetWidth - el.offsetWidth)/2) - sz(p,'borderLeftWidth');
var t = ((p.offsetHeight - el.offsetHeight)/2) - sz(p,'borderTopWidth');
if (x) s.left = l > 0 ? (l+'px') : '0';
if (y) s.top = t > 0 ? (t+'px') : '0';
};
function sz(el, p) {
return parseInt($.css(el,p))||0;
};
})(jQuery);