Added vandegraaff.js to compile HTML w/ javascript into static HTML f…

…or processing in prince

vandegraaff.js

@@ -0,0 +1,87 @@
+#!/usr/bin/env node
+
+/*    _
+ *   (_)v^o
+ *    |   |   vandegraaff.js - make static
+ *    -----
+ * 
+ *   vandegraaff "compiles" a site with javascript into static HTML.
+ *
+ */
+
+var fs = require('fs'),
+    path = require('path'),
+    jsdom = require('jsdom').jsdom;
+
+/* 
+ * Calls callback when window is ready 
+ */
+function whenReady(window, callback){
+  if(window.document.readyState !== 'complete'){
+    // Poll again in a bit
+    setTimeout(function(){
+      whenReady(window, callback);
+    }, 100);
+  }
+  else {
+    // I dunno... let's wait a bit longer for any scripts to finish?
+    setTimeout(function(){ callback(window); }, 100);
+  }
+}
+
+/* 
+ * Loads HTML w/ javascript then removes scripts.
+ * Callback is called with resulting window object.
+ */  
+function makeStatic(html, base, callback){
+  var opts = {};
+  if(base){
+    opts.url = base;
+  }
+  var document = jsdom(html, null, opts);
+  var window = document.createWindow();
+  whenReady(window, function(window){
+    var scripts = window.document.getElementsByTagName('script');
+    for(var i = 0; i < scripts.length; i++){
+      scripts[i].parentNode.removeChild(scripts[i]);
+    }
+    callback(window);
+  });
+}
+
+/*
+ * Main
+ */
+if( process.argv.length == 2 ){
+  // Read from stdin, write to stdout
+  var contents = "";
+  process.stdin.resume();
+  process.stdin.on('data', function(chunk){
+    contents += chunk; 
+  });
+  process.stdin.on('end', function(){
+    makeStatic(contents, null, function(window){
+      process.stdout.write(window.document.innerHTML);
+    });
+  });
+}
+else {
+  // Batch mode
+  for( var i = 2; i < process.argv.length; i++ ){
+    (function(){
+      var infile = process.argv[i];
+      var outfile = path.basename(infile, path.extname(infile)) + '.out' + path.extname(infile);
+      var url = path.resolve(infile);
+
+      fs.readFile(infile, function(err, contents){
+        if (err) throw err;
+        makeStatic(contents, url, function(window){
+          fs.writeFile(outfile, window.document.outerHTML, function(err){
+            if (err) throw err;
+            console.log(outfile + " written.");
+          });
+        });
+      });
+    })();
+  }
+}