root/lang/javascript/userchrome/OpenContextually.uc.js

// ==UserScript==
// @name           OpenContextually
// @description    open link contextually (selected text, selected link, cite attribute,,,)
// @author         snj14
// @namespace      http://white.s151.xrea.com/
// @include        chrome://browser/content/browser.xul
// ==/UserScript==

(function OpenContextually() {
        const MIN_LENGTH = 8;
        const kXULNS = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
        var contextMenu = document.getElementById("contentAreaContextMenu");
        var separator = document.getElementById("context-sep-properties");
        var urls = [];
        var command = function(){
                // for TreeStyleTab http://piro.sakura.ne.jp/xul/_treestyletab.html
                if ('TreeStyleTabService' in window) TreeStyleTabService.readyToOpenChildTab(gBrowser.selectedTab, true);
                urls.forEach(function(a){
                        gBrowser.addTab(a);
                });
                if ('TreeStyleTabService' in window) TreeStyleTabService.stopToOpenChildTab(gBrowser.selectedTab);
        }
        var menu = document.createElementNS(kXULNS, "menuitem");
        menu.id = "OpenContextually";
        menu.setAttribute("label", "Open");
        menu.setAttribute("accesskey", "O");
        menu.addEventListener("command", command, false);
        menu.hidden = true;
        contextMenu.insertBefore(menu, separator);
        
        // selected text url
        function selectTextUrl(selection){
                if(!gContextMenu.isTextSelected) return;
                var selection_string = selection.toString();
                var lst = selection_string.split(/\s/);
                var res = [];
                if(!lst.length) return;
                lst.forEach(function(a){
                        a = a.replace(/[^-.$,;:&=?!*~@#()%\w/]+/g,'');
                        a = a.replace(/^\s*(.+?)\s*$/,'$1');
                        a = a.replace(/^(?:h?t)?tp(s?):[/][/]/,'http$1://');
                        var reg = new RegExp("h?ttps?://");
                        if(a.length > MIN_LENGTH && a.match(reg)) res.push(a);
                        // /https?:\/\//
                });
                if(res.length){
                        return ["Open Text ( " + res.length + " )", res];
                }
        }
        // selected links
        function selectLink(selection){
                if(!gContextMenu.isTextSelected) return;
                var URIHash={}, URIList=[], node=null;
                function check(node){
                        if(!selection.containsNode(node, true)){
                                return NodeFilter.FILTER_SKIP;
                        }else if(node.tagName.toLowerCase() == 'a' && node.href){
                                return NodeFilter.FILTER_ACCEPT;
                        }else{
                                return NodeFilter.FILTER_SKIP;
                        }
                }
                for(var i=0,len=selection.rangeCount; i<len; i++){
                        var range = range=selection.getRangeAt(i);
                        if((range.endContainer === range.startContainer) &&
                           (check(node=range.commonAncestorContainer.parentNode) == NodeFilter.FILTER_ACCEPT)){
                                URIHash[node.href] = true;
                        }else{
                                var walker = document.createTreeWalker(range.commonAncestorContainer, NodeFilter.SHOW_ELEMENT, check, false);
                                if(range.startContainer.nodeValue.length == range.startOffset)
                                  walker.currentNode = range.startContainer;
                                while(walker.nextNode())
                                  URIHash[walker.currentNode.href] = true;
                        }
                }
                for(var tmp in URIHash) URIList.push(tmp);
                if(URIList.length){
                        return ["Open Links ( " + URIList.length + " )", URIList];
                }
        }
        // blockquote's cite attribute
        function blockquoteCite(selection){
                var element = gContextMenu.target;
                while(element.parentNode){
                        if(element.localName.toLowerCase() == "q" ||
                           element.localName.toLowerCase() == "blockquote"){
                                return ["Open original document"
                                                ,[element.getAttribute("cite")]];
                        }else{
                                element = element.parentNode;
                        }
                }
        }
        // twitter's @username
        function selectTwitterUserName(selection){
                if(!gContextMenu.isTextSelected) return;
                if(selection.toString().match(/@(\w+)/))
                  return ["Open Twitter ( " + RegExp.$1 + " )",
                                  ['http://twitter.com/' + RegExp.$1]];
        }
        function setContextMenu(aEvent){
                if(aEvent.target != aEvent.currentTarget) return;
                urls = [];
                menu.hidden = true;
                var getter = [selectTextUrl
                                          , selectLink
                                          , blockquoteCite
                                          , selectTwitterUserName
                                          ];
                var label;
                var selection = content.getSelection();
                for(var i=0; i<getter.length && menu.hidden; i++){
                        var res = getter[i](selection);
                        if(!!res){
                                [label, urls] = res;
                                if(urls.length){
                                        menu.hidden = false;
                                        menu.setAttribute("label", label);
                                }
                        }
                }
        }
        contextMenu.addEventListener("popupshowing", setContextMenu, false);
})();