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