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var docFrame;
var logtextbox;
var destFile;
var embedFonts = false;
var finalMathJaxURL = null;
function log(text)
{
logtextbox.setAttribute("value", logtextbox.getAttribute("value") + "\n" + text);
}
function init()
{
try {
docFrame = document.getElementById("docFrame");
logtextbox = document.getElementById("logtextbox");
// parse command line arguments
var cmdLine = window.arguments[0];
cmdLine = cmdLine.QueryInterface(Components.interfaces.nsICommandLine);
embedFonts = cmdLine.handleFlag("embed-fonts", false);
finalMathJaxURL = cmdLine.handleFlagWithParam("final-mathjax-url", false);
if (!embedFonts && !finalMathJaxURL) {
alert("You must eiher specify --embed-fonts or --final-mathjax-url");
window.close();
return;
}
sourceFilePath = cmdLine.getArgument(0);
destFilePath = cmdLine.getArgument(1);
if ( !sourceFilePath || !destFilePath ) {
alert("Not enough parameters, expecting two arguments:\nInput file, output file");
window.close();
return;
}
sourceFile = cmdLine.resolveFile(sourceFilePath);
if (! (sourceFile.exists() && sourceFile.isFile()) ) {
alert("Invalid source file path.");
window.close();
return;
}
sourceURI = cmdLine.resolveURI(sourceFilePath);
// create a nsIFile object for the output file
try{
destFile = cmdLine.resolveURI(destFilePath).QueryInterface(Components.interfaces.nsIFileURL).file;
}catch(e){
alert("Invalid destination file.\n\nException:\n" + e);
window.close();
return;
}
// add iframeLoaded() as an onload event handler, then navigate to the source file
docFrame.addEventListener("DOMContentLoaded", iframeLoaded, true);
docFrame.setAttribute("src", sourceURI.spec);
} catch (e) {
alert("Error in init():\n\n" + e);
window.close();
return;
}
}
function iframeLoaded()
{
/*
// print every MathJax signal to the log
docFrame.contentWindow.MathJax.Hub.Startup.signal.Interest(
function (message) {log("Startup: "+message)}
);
docFrame.contentWindow.MathJax.Hub.signal.Interest(
function (message) {log("Hub: "+message)}
);
*/
// tell MathJax to call serialize() when finished
docFrame.contentWindow.MathJax.Hub.Register.StartupHook("End", function() {serialize();});
}
function fileURLtoDataURI(url)
{
var ios = Components.classes["@mozilla.org/network/io-service;1"]
.getService(Components.interfaces.nsIIOService);
var url_object = ios.newURI(url, "", null);
var file = url_object.QueryInterface(Components.interfaces.nsIFileURL).file;
var data = "";
var fstream = Components.classes["@mozilla.org/network/file-input-stream;1"].
createInstance(Components.interfaces.nsIFileInputStream);
fstream.init(file, -1, -1, false);
var bstream = Components.classes["@mozilla.org/binaryinputstream;1"].
createInstance(Components.interfaces.nsIBinaryInputStream);
bstream.setInputStream(fstream);
var bytes = bstream.readBytes(bstream.available());
b64bytes = btoa(bytes);
return "data:;base64," + b64bytes;
}
function serialize()
{
var MathJaxURL = docFrame.contentWindow.MathJax.Hub.config.root;
var searchURIList = new Array();
var replacementURIList = new Array();
log("serialize: preprocessing");
// remove the MathJax status message window
msgdiv = docFrame.contentDocument.getElementById("MathJax_Message");
msgdiv.parentNode.removeChild(msgdiv);
/* Loop through all CSS rules to find all @font-face rules.
At this point, they refer to local absolute paths using file:// URLs.
Replace them either with appropriate URLs relative to finalMathJaxURL
or with data URIs. */
for (var i = 0; i<docFrame.contentDocument.styleSheets.length; i++) {
var stylesheet = docFrame.contentDocument.styleSheets[i];
for (var j=0; j< stylesheet.cssRules.length; j++) {
var rule = stylesheet.cssRules[j];
if (rule.cssText.match("font-face")) {
url = rule.style.getPropertyValue("src");
url = url.match(/url\(\"(.+)\"\)/)[1];
// Since the properties seem read-only here, we populate
// searchURIList and replacementURIList to do text substitution
// after serialization
searchURIList.push(url);
if (embedFonts) {
replacementURIList.push(fileURLtoDataURI(url));
} else {
replacementURIList.push(url.replace(MathJaxURL, finalMathJaxURL));
}
}
}
}
// find and remove the MathJax <script> tag
try{
var scriptTags = docFrame.contentDocument.getElementsByTagName("script");
for (var i=0; i<scriptTags.length; i++) {
if (scriptTags[i].getAttribute("src") && scriptTags[i].getAttribute("src").match(/MathJax.js/i))
scriptTags[i].parentNode.removeChild(scriptTags[i]);
}
}catch(e){alert(e);}
log("serialize: serializing");
var serializer = new XMLSerializer();
var xhtml = serializer.serializeToString(docFrame.contentDocument);
log("serialize: postprocessing");
// make the MathJax URL relative again
// xhtml = xhtml.replace(findMathJaxURL, "MathJax");
try{
r1 = RegExp("<!--/\\*--><!\\[CDATA\\[/\\*><!--\\*/", "g");
xhtml = xhtml.replace(r1, "");
r2 = RegExp("/\\*\\]\\]>\\*/-->", "g");
xhtml = xhtml.replace(r2, "");
r3 = RegExp("/\\*\\]\\]>\\*///-->", "g");
xhtml = xhtml.replace(r3, "");
}catch(e){alert(e);}
for (var i=0; i<searchURIList.length; i++)
xhtml = xhtml.replace(searchURIList[i], replacementURIList[i]);
save(xhtml);
window.close();
}
function save(xhtml)
{
try {
var foStream = Components.classes["@mozilla.org/network/file-output-stream;1"].
createInstance(Components.interfaces.nsIFileOutputStream);
foStream.init(destFile, 0x02 | 0x08 | 0x20, 0666, 0);
// write, create, truncate
// write in UTF-8 encoding
var converter = Components.classes["@mozilla.org/intl/converter-output-stream;1"].
createInstance(Components.interfaces.nsIConverterOutputStream);
converter.init(foStream, "UTF-8", 0, 0);
converter.writeString(xhtml);
converter.close(); // this closes foStream
} catch (e) {
alert("Error in save():\n\n" + e);
}
}
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