Starting on v1.24.0; first change: support for encoding ESC characters in SerialPort test strings (support which perhaps should eventually be moved into getComponentParms() instead)

modules/pc8080/lib/serialport.js

@@ -325,10 +325,31 @@ SerialPort.prototype.setBinding = function(sHTMLType, sBinding, control, sValue)
              * that do not conflict with predefined controls (which, of course, is the only way you can get here).
              */
             this.bindings[sBinding] = control;
+
             /*
-             * Convert any "backslashed" sequences into the appropriate control characters.
+             * Backslash sequences like \n, \r and \\ have already been converted to LF, CR and backslash
+             * characters, by virtue of the eval() function that all our component parameter strings pass through;
+             * eval() treats strings like "source code", so any backslash sequence that JavaScript supports is
+             * automatically converted.
+             *
+             * The complete list of supported backslash sequences:
+             *
+             *      \0  \'  \"  \\  \n  \r  \v  \t  \b  \f  \uXXXX \xXX
+             *
+             * We also want to support some additional sequences, like backslash-e for ESC.  Only one problem: for
+             * any unrecognized backslash sequence, eval() simply removes the backslash.  So we have to double-backslash
+             * it, which eval() will replace with a single backslash.
+             *
+             * So, additional supported backslash sequences include:
+             *
+             *      \\e (ESC)
+             *
+             * Note that I've judiciously avoided using terms "escape notation" or "escape sequence" to talk about
+             * these sequences, because ESC is one of the additional characters I want to support, and using the word
+             * "escape" in both contexts is WAY confusing.
              */
-            sValue = sValue.replace(/\\n/g, "\n").replace(/\\r/g, "\r");
+            sValue = sValue.replace(/\\e/g, String.fromCharCode(0x1b));
+
             control.onclick = function onClickTest(event) {
                 serial.receiveData(sValue);
                 /*