Preserve file/line information with saved ex commands (:au, :com, :map -ex).

common/content/autocommands.js

@@ -128,16 +128,7 @@ const AutoCommands = Module("autocommands", {
                 lastPattern = autoCmd.pattern;
                 dactyl.echomsg("autocommand " + autoCmd.command, 9);
 
-                if (typeof autoCmd.command == "function") {
-                    try {
-                        autoCmd.command.call(autoCmd, args);
-                    }
-                    catch (e) {
-                        dactyl.echoerr(e);
-                    }
-                }
-                else
-                    dactyl.execute(commands.replaceTokens(autoCmd.command, args), null, true);
+                autoCmd.command(args);
             }
         }
     }
@@ -173,8 +164,16 @@ const AutoCommands = Module("autocommands", {
                 if (args.length > 2) { // add new command, possibly removing all others with the same event/pattern
                     if (args.bang)
                         autocommands.remove(event, regex);
-                    if (args["-javascript"])
+                    if (args["-javascript"]) {
                         cmd = dactyl.userFunc("args", "with(args) {" + cmd + "}");
+                        cmd.toString = function toString() "-javascript " + cmd.source;
+                    }
+                    else {
+                        cmd = function cmd(args) dactyl.execute(commands.replaceTokens(cmd.source, args), null, true, cmd.sourcing);
+                        cmd.sourcing = io.sourcing && update({}, io.sourcing);
+                        cmd.toString = function toString() cmd.source;
+                    }
+                    cmd.source = args[2];
                     autocommands.add(events, regex, cmd);
                 }
                 else {

common/content/commandline.js

@@ -404,14 +404,10 @@ const CommandLine = Module("commandline", {
     },
 
     runSilently: function (func, self) {
-        let wasSilent = this._silent;
+        this.withSavedValues(["_silent"], function () {
             this._silent = true;
-        try {
             func.call(self);
-        }
-        finally {
-            this._silent = wasSilent;
-        }
+        });
     },
 
     hideCompletions: function () {

common/content/commands.js

@@ -997,7 +997,7 @@ const Commands = Module("commands", {
                 count: this.count && args.count
             };
 
-            dactyl.execute(commands.replaceTokens(this.replacementText, tokens));
+            dactyl.execute(commands.replaceTokens(this.replacementText, tokens), null, true, this.sourcing);
         }
 
         // TODO: offer completion.ex?
@@ -1062,7 +1062,8 @@ const Commands = Module("commands", {
                                         bang: bangOpt,
                                         count: countOpt,
                                         completer: completeFunc,
-                                        replacementText: args.literalArg
+                                        replacementText: args.literalArg,
+                                        sourcing: io.sourcing && update({}, io.sourcing)
                                     }, args.bang);
 
                     if (!added)

common/content/dactyl.js

@@ -330,7 +330,7 @@ const Dactyl = Module("dactyl", {
      */
     userFunc: function () {
         return this.userEval(
-            "(function (" +
+            "(function userFunction(" +
             Array.slice(arguments, 0, -1).join(", ") +
             ") { " + arguments[arguments.length - 1] + " })");
     },
@@ -344,7 +344,7 @@ const Dactyl = Module("dactyl", {
      * @param {boolean} silent Whether the command should be echoed on the
      *     command line.
      */
-    execute: function (str, modifiers, silent) {
+    execute: function (str, modifiers, silent, sourcing) {
         // skip comments and blank lines
         if (/^\s*("|$)/.test(str))
             return;
@@ -359,7 +359,10 @@ const Dactyl = Module("dactyl", {
             if (!silent)
                 commandline.command = str.replace(/^\s*:\s*/, "");
 
+            io.withSavedValues(["sourcing"], function () {
+                io.sourcing = sourcing || io.sourcing;
                 command.execute(args, modifiers);
+            });
         }
     },
 

common/content/finder.js

@@ -412,7 +412,7 @@ const RangeFind = Class("RangeFind", {
     },
 
     iter: function (word) {
-        let saved = ["range", "lastRange", "lastString"].map(function (s) [s, this[s]], this);
+        let saved = ["lastRange", "lastString", "range"].map(function (s) [s, this[s]], this);
         try {
             this.range = this.ranges[0];
             this.lastRange = null;

common/content/io.js

@@ -317,10 +317,9 @@ lookup:
      * @param {boolean} silent Whether errors should be reported.
      */
     source: function (filename, silent) {
-        let wasSourcing = this.sourcing;
-        let readHeredoc = this.readHeredoc;
         defineModule.loadLog.push("sourcing " + filename);
         let time = Date.now();
+        this.withSavedValues(["readHeredoc", "sourcing"], function () {
             try {
                 var file = io.File(filename);
                 this.sourcing = {
@@ -412,9 +411,8 @@ lookup:
             }
             finally {
                 defineModule.loadLog.push("done sourcing " + filename + ": " + (Date.now() - time) + "ms");
-            this.sourcing = wasSourcing;
-            this.readHeredoc = readHeredoc;
             }
+        });
     },
 
     // TODO: when https://bugzilla.mozilla.org/show_bug.cgi?id=68702 is

common/content/mappings.js

@@ -384,9 +384,9 @@ const Mappings = Module("mappings", {
                     }
                     else if (args["-ex"]) {
                         rhs = ["-ex", rhs];
-                        action = function (count) {
-                            dactyl.execute(commands.replaceTokens(rhs[1], { count: count }));
-                        };
+                        action = function action(count)
+                            dactyl.execute(commands.replaceTokens(rhs[1], { count: count }), null, true, action.sourcing);
+                        action.sourcing = io.sourcing && update({}, io.sourcing);
                     }
                     else {
                         rhs = [events.canonicalKeys(rhs)];

common/modules/base.jsm

@@ -764,6 +764,16 @@ Class.prototype = {
      */
     init: function () {},
 
+    withSavedValues: function (names, callback, self) {
+        let vals = names.map(function (name) this[name], this);
+        try {
+            return callback.call(self || this);
+        }
+        finally {
+            names.forEach(function (name, i) this[name] = vals[i], this);
+        }
+    },
+
     toString: function () "[instance " + this.constructor.className + "]",
 
     /**