Allow \c/\C in regexp options and so forth.

common/modules/commands.jsm

@@ -15,10 +15,6 @@ defineModule("commands", {
     use: ["config", "messages", "options", "services", "template"]
 }, this);
 
-let base = util.regexp.escape(Components.stack.filename.replace(/[^\/]+$/, ""));
-let re = RegExp("^(resource://dactyl|" + base + ")\\S+( -> resource://dactyl(?!-content/eval.js)\\S+)?$");
-let isDactyl = function isDactyl(frame) re.test(frame.filename);
-
 /**
  * A structure representing the options available for a command.
  *
@@ -692,7 +688,7 @@ var Commands = Module("commands", {
     repeat: null,
 
     add: function add() {
-        util.assert(isDactyl(Components.stack.caller),
+        util.assert(util.isDactyl(Components.stack.caller),
                     "User scripts may not add builtin commands. Please use group.commands.add instead.");
         return this.builtin._add.apply(this.builtin, arguments);
     },

common/modules/completion.jsm

@@ -903,7 +903,9 @@ var Completion = Module("completion", {
     url: function url(context, complete) {
 
         if (this.options["urlseparator"])
-            var skip = RegExp("^.*" + this.options["urlseparator"] + "\\s*").exec(context.filter);
+            var skip = util.regexp("^.*" + this.options["urlseparator"] + "\\s*")
+                           .exec(context.filter);
+
         if (skip)
             context.advance(skip[0].length);
 

common/modules/highlight.jsm

@@ -406,12 +406,14 @@ var Highlights = Module("Highlight", {
     completion: function (dactyl, modules) {
         const { completion, config, io } = modules;
         completion.colorScheme = function colorScheme(context) {
+            let extRe = RegExp("\\." + config.fileExtension + "$");
+
             context.title = ["Color Scheme", "Runtime Path"];
-            context.keys = { text: function (f) f.leafName.replace(RegExp("\\." + config.fileExtension + "$"), ""), description: ".parent.path" };
+            context.keys = { text: function (f) f.leafName.replace(extRe, ""), description: ".parent.path" };
             context.completions = array.flatten(
                 io.getRuntimeDirectories("colors").map(
                     function (dir) dir.readDirectory().filter(
-                        function (file) RegExp("\\." + config.fileExtension + "$").test(file.leafName))));
+                        function (file) extRe.test(file.leafName))));
 
         };
 

common/modules/options.jsm

@@ -425,7 +425,7 @@ var Option = Class("Option", {
             flags = this && this.regexpFlags || "";
 
         let [, bang, val] = /^(!?)(.*)/.exec(value);
-        let re = RegExp(Option.dequote(val), flags);
+        let re = util.regexp(Option.dequote(val), flags);
         re.bang = bang;
         re.result = result !== undefined ? result : !bang;
         re.toString = function () Option.unparseRegexp(this, keepQuotes);

common/modules/styles.jsm

@@ -413,7 +413,7 @@ var Styles = Module("Styles", {
         if (filter === "*")
             var test = function test(uri) true;
         else if (!/^(?:[a-z-]+:|[a-z-.]+$)/.test(filter)) {
-            let re = RegExp(filter);
+            let re = util.regexp(filter);
             test = function test(uri) re.test(uri.spec);
         }
         else if (/[*]$/.test(filter)) {

common/modules/util.jsm

@@ -177,20 +177,18 @@ var Util = Module("Util", XPCOM([Ci.nsIObserver, Ci.nsISupportsWeakReference]),
      * @returns {RegExp}
      */
     charListToRegexp: function charListToRegexp(list, accepted) {
-        let list = list.replace(/\s+/g, "");
+        list = list.replace(/\s+/g, "");
 
         // check for chars not in the accepted range
         this.assert(RegExp("^[" + accepted + "-]+$").test(list),
-                "Character list outside the range " + accepted.quote());
+                    "Character list outside the range " + accepted.quote());
 
         // check for illegal ranges
-        let matches = list.match(RegExp("[" + accepted + "]-[" + accepted + "]", "g"));
-        if (matches) {
-            for (let match in values(matches))
-                this.assert(match[0] <= match[2],
-                    "Invalid character range: " + list.match(match + ".*")[0]);
-        }
-        return RegExp("[" + list + "]");
+        for (let [match] in this.regexp.iterate(/.-./g, list))
+            this.assert(match.charCodeAt(0) <= match.charCodeAt(2),
+                        "Invalid character range: " + list.slice(list.indexOf(match)))
+
+        return RegExp("[" + util.regexp.escape(list) + "]");
     },
 
     get chromePackages() {
@@ -822,6 +820,18 @@ var Util = Module("Util", XPCOM([Ci.nsIObserver, Ci.nsISupportsWeakReference]),
         bottom: Math.min(r1.bottom, r2.bottom)
     }),
 
+    /**
+     * Returns true if the given stack frame resides in Dactyl code.
+     *
+     * @param {nsIStackFrame} frame
+     * @returns {boolean}
+     */
+    isDactyl: Class.memoize(function () {
+        let base = util.regexp.escape(Components.stack.filename.replace(/[^\/]+$/, ""));
+        let re = RegExp("^(resource://dactyl|" + base + ")\\S+( -> resource://dactyl(?!-content/eval.js)\\S+)?$");
+        return function isDactyl(frame) re.test(frame.filename);
+    }),
+
     /**
      * Returns true if *url* is in the domain *domain*.
      *
@@ -1340,6 +1350,16 @@ var Util = Module("Util", XPCOM([Ci.nsIObserver, Ci.nsISupportsWeakReference]),
         if (isinstance(expr, ["RegExp"]))
             expr = expr.source;
 
+        expr = String.replace(expr, /\\(.)/, function (m, m1) {
+            if (m1 === "c")
+                flags = flags.replace(/i/g, "") + "i";
+            else if (m === "C")
+                flags = flags.replace(/i/g, "");
+            else
+                return m;
+            return "";
+        });
+
         // Replace replacement <tokens>.
         if (tokens)
             expr = String.replace(expr, /(\(?P)?<(\w+)>/g, function (m, n1, n2) !n1 && set.has(tokens, n2) ? tokens[n2].dactylSource || tokens[n2].source || tokens[n2] : m);