Crude source line linkification in :*usage.

common/content/buffer.js

@@ -142,6 +142,11 @@ const Buffer = Module("buffer", {
             return Array.map(metaNodes, function (node) [(node.name || node.httpEquiv), template.highlightURL(node.content)])
                         .sort(function (a, b) util.compareIgnoreCase(a[0], b[0]));
         });
+
+        dactyl.commands["buffer.viewSource"] = function (event) {
+            let elem = event.originalTarget;
+            buffer.viewSource([elem.getAttribute("href"), Number(elem.getAttribute("line"))])
+        };
     },
 
     destroy: function () {
@@ -951,6 +956,19 @@ const Buffer = Module("buffer", {
     viewSource: function (url, useExternalEditor) {
         let doc = buffer.focusedFrame.document;
 
+        if (isArray(url)) {
+            let chrome = "chrome://global/content/viewSource.xul";
+            window.openDialog(chrome, "_blank", "all,dialog=no",
+                              url[0], null, null, url[1]);
+            /* FIXME
+            let win = dactyl.open(chrome)[0];
+            while (win.document.documentURI != chrome)
+                util.threadYield(false, true);
+            win.arguments = [url[0], null, null, url[1]];
+            */
+            return;
+        }
+
         if (useExternalEditor)
             this.viewSourceExternally(url || doc);
         else {

common/content/commands.js

@@ -451,10 +451,14 @@ const Commands = Module("commands", {
     repeat: null,
 
     _addCommand: function (args, replace) {
+        if (!args[3])
+            args[3] = {};
+        args[3].definedAt = Components.stack.caller.caller;
+
         let names = array.flatten(Command.parseSpecs(args[0]));
         dactyl.assert(!names.some(function (name) name in this._exMap && !this._exMap[name].user, this),
                       "E182: Can't replace non-user command: " + args[0][0]);
-        if (!replace || !(args[3] && args[3].user))
+        if (!replace || !args[3].user)
             dactyl.assert(!names.some(function (name) name in this._exMap, this),
                           "Not replacing command " + args[0]);
         for (let name in values(names)) {

common/content/dactyl.js

@@ -888,24 +888,23 @@ const Dactyl = Module("dactyl", {
                 switch (where) {
                 case dactyl.CURRENT_TAB:
                     browser.loadURIWithFlags(url, flags, null, null, postdata);
-                    break;
+                    return browser.contentWindow;
 
                 case dactyl.NEW_TAB:
                     if (!dactyl.has("tabs"))
                         return open(urls, dactyl.NEW_WINDOW);
 
-                    prefs.withContext(function () {
+                    return prefs.withContext(function () {
                         prefs.set("browser.tabs.loadInBackground", true);
-                        browser.loadOneTab(url, null, null, postdata, background);
+                        return browser.loadOneTab(url, null, null, postdata, background).linkedBrowser.contentDocument;
                     });
-                    break;
 
                 case dactyl.NEW_WINDOW:
                     window.open();
                     let win = services.windowMediator.getMostRecentWindow("navigator:browser");
                     win.loadURI(url, null, postdata);
                     browser = win.getBrowser();
-                    break;
+                    return win.content;
                 }
             }
             catch (e) {}
@@ -921,11 +920,12 @@ const Dactyl = Module("dactyl", {
         else if (!where)
             where = dactyl.CURRENT_TAB;
 
-        for (let [, url] in Iterator(urls)) {
+        return urls.map(function (url) {
-            open(url, where);
+            let res = open(url, where);
             where = dactyl.NEW_TAB;
             background = true;
-        }
+            return res;
+        });
     },
 
     pluginFiles: {},

common/content/mappings.js

@@ -140,6 +140,7 @@ const Mappings = Module("mappings", {
 
     _addMap: function (map) {
         let where = map.user ? this._user : this._main;
+        map.definedAt = Components.stack.caller.caller;
         map.modes.forEach(function (mode) {
             if (!(mode in where))
                 where[mode] = [];

common/content/options.js

@@ -642,6 +642,8 @@ const Options = Module("options", {
         if (!extraInfo)
             extraInfo = {};
 
+        extraInfo.definedAt = Components.stack.caller;
+
         let name = names[0];
         if (name in this._optionMap) {
             dactyl.log("Warning: " + name.quote() + " already exists: replacing existing option.", 1);

common/modules/template.jsm

@@ -294,7 +294,14 @@ const Template = Module("Template", {
             {
                 this.map(iter, function (item)
                 <tr>
-                    <td highlight="Title" style="padding-right: 20px">{item.name || item.names[0]}</td>
+                    <td highlight="Title" style="padding-right: 20px">{
+                        let (name = item.name || item.names[0], frame = item.definedAt)
+                            frame ? <a xmlns:dactyl={NS} dactyl:command="buffer.viewSource"
+                                       href={frame.filename} line={frame.lineNumber}>
+                                       <abbr title={"Defined at " + frame.filename + ":" + frame.lineNumber}>
+                                       {name}</abbr></a>
+                                  : name
+                    }</td>
                     <td>{item.description}</td>
                 </tr>)
             }