Add a basic command line interface. #7

commonJS.js

@@ -20,6 +20,46 @@ if (typeof require !== "undefined" && typeof exports !== "undefined") {
     return TeXZilla.toMathML.apply(TeXZilla, arguments);
   };
 
-  /* FIXME: add some commonJS command line API.
-     https://github.com/fred-wang/TeXZilla/issues/7 */
+  /* Command line API */
+  var system = require("system");
+  var args = system.args;
+
+  function usage(aName) {
+    console.log("\nUsage:\n");
+    console.log("slimerjs " + aName + " [help]");
+    console.log("  Print this help message.\n");
+    console.log("slimerjs " + aName + " parser aTeX [aDisplay] [aRTL] [aThrowExceptionOnError]");
+    console.log("  Print TeXZilla.toMathMLString(aTeX, aDisplay, aRTL, aThrowExceptionOnError)");
+    console.log("  The interpretation of arguments and the default values are the same.\n");
+    console.log("slimerjs " + aName + " webserver [port]");
+    console.log("  TODO\n");
+    console.log("cat input | slimerjs " + aName + " stream > output");
+    console.log("  TODO\n");
+  }
+
+  if (args.length >= 3 && args[1] === "parser") {
+    var tex = args[2];
+    var display = (args.length >= 4 ? args[3] === "true" : false);
+    var RTL = (args.length >= 5 ? args[4] === "true" : false);
+    var throwException = (args.length >= 6 ? args[5] === "true" : false);
+    try {
+      console.log(TeXZilla.toMathMLString(tex, display, RTL, throwException));
+    } catch(e) {
+      /* FIXME: This should probably call exit with status 1.
+         https://github.com/fred-wang/TeXZilla/issues/6 */
+      console.log(e);
+    }
+  } else {
+    /* FIXME: add a stream filter and web server
+       https://github.com/fred-wang/TeXZilla/issues/7 */
+    usage(args[0]);
+  }
+
+  /* FIXME: We should use a standard commoneJS syntax for exit.
+     https://github.com/fred-wang/TeXZilla/issues/6 */
+  if (slimer) {
+    slimer.exit()
+  } else if (phantom) {
+    phantom.exit()
+  }
 }