BlockUI CSS

2019-04-15 15:19发布生成海报

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 $.blockUI({
                           message: '   ',
                           css: {
                               width: "0",
                               height: "0",
                               marginTop: '-123px',   
                               backgroundColor: "#7EC0EE",
                               border: "1px solid #104E8B"
                           }
                       });

$.blockUI.defaults = {  
    // message displayed when blocking (use null for no message)  
    message:  'Please wait...',  
  
    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:      '280px',  
        top:        '50%',  
        left:       '50%',  
        textAlign:  'left',  
        marginLeft:     '-140px',   
        marginTop:      '-123px',   
        color:      '#000',  
        border:     'none',  
        backgroundColor:'#fff',  
        cursor:     'auto'  
    },  
      
    // 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',  
        '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)   
        ? $('')  
        : $('');  
    var lyr2 = $('');  
      
    var lyr3, s;  
    if (opts.theme && full) {  
        s = '' +  
                ''+(opts.title || ' ')+'' +  
                '' +  
            '';  
    }  
    else if (opts.theme) {  
        s = '' +  
                ''+(opts.title || ' ')+'' +  
                '' +  
            '';  
    }  
    else if (full) {  
        s = '';  
    }             
    else {  
        s = '';  
    }  
    lyr3 = $(s);  
  
    // 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);

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