Function addPageScript

Picviewer CE+/dist.user.js:26337–26391

()

            return _isunsafe;
        }
        function addPageScript() {
            var pageScriptText=function(messageID){
                var frameID=Math.random();
                var frames={
                    top:window.top,
                };

                window.addEventListener('message',function(e){
                    var data=e.data;
                    if( !data || !data.messageID || data.messageID != messageID )return;//通信ID认证
                    var source=e.source;
                    if(source===window || source===unsafeWindow){//来自contentscript,发送出去,或者干嘛。
                        if(data.to){
                            data.from=frameID;
                            frames[data.to].postMessage(data,'*');
                        }else{
                            switch(data.command){
                                case 'getIframeObject':{
                                    var frameWindow=frames[data.windowId];
                                    var iframes=document.getElementsByTagName('iframe');
                                    var iframe;
                                    var targetIframe;
                                    for(var i=iframes.length-1 ; i>=0 ; i--){
                                        iframe=iframes[i];
                                        if(iframe.contentWindow===frameWindow){
                                            targetIframe=iframe;
                                            break;
                                        };
                                    };
                                    var cusEvent=document.createEvent('CustomEvent');
                                    cusEvent.initCustomEvent('pv-getIframeObject',false,false,targetIframe);
                                    document.dispatchEvent(cusEvent);
                                }break;
                            };
                        };

                    }else{//来自别的窗口的，contentscript可以直接接收，这里保存下来自的窗口的引用
                        frames[data.from]=source;
                    };
                },true)
            };

            try{
                if(isunsafe()){
                    pageScriptText(messageID);
                }else{
                    var pageScript=document.createElement('script');
                    pageScript.id = 'picviewer-page-script';
                    pageScript.textContent=createScript('(' + pageScriptText.toString() + ')('+ JSON.stringify(messageID) +')');
                    if(document.head)document.head.appendChild(pageScript);
                }
            }catch(e){
                console.debug("addPageScript function failed", e);
            }
        }

        function clickToOpen(data){
            var preventDefault = matchedRule.clickToOpen.preventDefault;