Function handleMessage

Picviewer CE+/dist.user.js:26231–26318

(e)

        var frameSentData;
        var frameSentSuccessData;
        function handleMessage(e){
            var data=e.data;
            if( !data || !data.messageID || data.messageID != messageID )return;
            var source=e.source,command,cusEvent;
            if(typeof source=='undefined' || source!==window){
                if(!isFrame){
                    command=data.command;
                    switch(command){
                        case 'open':{
                            if (data.buttonType === 'download') {
                                downloadImg(data.src, document.title, prefs.saveName);
                                return;
                            }
                            var img=document.createElement('img');
                            img.src=data.src;

                            imgReady(img,{
                                ready:function(){
                                    LoadingAnimC.prototype.open.call({
                                        img:img,
                                        data:data.data,
                                        buttonType:data.buttonType,
                                        from:data.from,
                                    });
                                },
                            });
                        }break;
                        case 'navigateToImg':{
                            cusEvent=document.createEvent('CustomEvent');
                            cusEvent.initCustomEvent('pv-navigateToImg',false,false,data.exist);
                            document.dispatchEvent(cusEvent);
                        }break;
                        case 'topWindowValid':{
                            if(data.from)
                            window.postMessage({
                                messageID:messageID,
                                command:'topWindowValid_frame',
                                valid:getBody(document).nodeName.toUpperCase()!='FRAMESET',
                                to:data.from,
                            },'*');
                        }break;
                    };

                }else{
                    command=data.command;
                    switch(command){
                        case 'navigateToImg':{

                            if(!frameSentData.unique){
                                var unique=GalleryC.prototype.unique(frameSentData);
                                frameSentData=unique.data;
                                frameSentData.unique=true;
                            };
                            var targetImg=frameSentData[data.index].img;
                            var exist=(document.documentElement.contains(targetImg) && unsafeWindow.getComputedStyle(targetImg).display!='none');

                            if(exist){
                                if(gallery && gallery.shown){