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// List and extract embedded files in a PDF document.
if (scriptArgs.length != 1 && scriptArgs.length != 3) {
print("usage: mutool run pdf-portfolio.js input.pdf [index filename]");
print(" List embedded files, or extract an embedded file from a PDF document.")
quit();
}
var doc = new PDFDocument(scriptArgs[0]);
var Root = doc.getTrailer().Root
if (!("EmbeddedFiles" in Root.Names)) {
print("Document has no embedded files!");
quit();
}
function mapNameTree(N, fn) {
function mapNameTreeNames(NN) {
var i, n = NN.length;
for (i = 0; i < n; i += 2)
fn(NN[i], NN[i+1]);
}
function mapNameTreeKids(NK) {
var i, n = NK.length;
for (i = 0; i < n; ++i)
mapNameTree(NK[i], fn)
}
if ("Names" in N)
mapNameTreeNames(N.Names);
if ("Kids" in N)
mapNameTreeKids(N.Kids);
}
function fileNameFromFS(fs) {
if ("UF" in fs) return fs.UF.asString();
if ("F" in fs) return fs.F.asString();
if ("Unix" in fs) return fs.Unix.asString();
if ("DOS" in fs) return fs.DOS.asString();
if ("Mac" in fs) return fs.Mac.asString();
return "Untitled";
}
if (scriptArgs.length == 1) {
var idx = 1;
mapNameTree(Root.Names.EmbeddedFiles, function (name,fs) {
print(idx, name.asString());
print("\tFilename:", fileNameFromFS(fs));
if ("Desc" in fs)
print("\tDescription:", fs.Desc.asString());
++idx;
});
}
if (scriptArgs.length == 3) {
var idx = 1;
mapNameTree(Root.Names.EmbeddedFiles, function (name,fs) {
if (idx == scriptArgs[1]) {
print("Saving embedded file", idx, "as:", scriptArgs[2]);
fs.EF.F.readStream().save(scriptArgs[2]);
}
++idx;
});
}
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