/var/www/greso.tech/server/nsm/node_modules/pdf-lib/es/core/embedders
Edit: /var/www/greso.tech/server/nsm/node_modules/pdf-lib/es/core/embedders/PDFPageEmbedder.js (4344B)
import { __awaiter, __generator } from "tslib";
import { MissingPageContentsEmbeddingError, UnrecognizedStreamTypeError, } from "../errors";
import PDFNumber from "../objects/PDFNumber";
import PDFRawStream from "../objects/PDFRawStream";
import PDFStream from "../objects/PDFStream";
import { decodePDFRawStream } from "../streams/decode";
import PDFContentStream from "../structures/PDFContentStream";
import CharCodes from "../syntax/CharCodes";
import { mergeIntoTypedArray } from "../../utils";
var fullPageBoundingBox = function (page) {
var mediaBox = page.MediaBox();
var width = mediaBox.lookup(2, PDFNumber).asNumber() -
mediaBox.lookup(0, PDFNumber).asNumber();
var height = mediaBox.lookup(3, PDFNumber).asNumber() -
mediaBox.lookup(1, PDFNumber).asNumber();
return { left: 0, bottom: 0, right: width, top: height };
};
// Returns the identity matrix, modified to position the content of the given
// bounding box at (0, 0).
var boundingBoxAdjustedMatrix = function (bb) { return [1, 0, 0, 1, -bb.left, -bb.bottom]; };
var PDFPageEmbedder = /** @class */ (function () {
function PDFPageEmbedder(page, boundingBox, transformationMatrix) {
this.page = page;
var bb = boundingBox !== null && boundingBox !== void 0 ? boundingBox : fullPageBoundingBox(page);
this.width = bb.right - bb.left;
this.height = bb.top - bb.bottom;
this.boundingBox = bb;
this.transformationMatrix = transformationMatrix !== null && transformationMatrix !== void 0 ? transformationMatrix : boundingBoxAdjustedMatrix(bb);
}
PDFPageEmbedder.for = function (page, boundingBox, transformationMatrix) {
return __awaiter(this, void 0, void 0, function () {
return __generator(this, function (_a) {
return [2 /*return*/, new PDFPageEmbedder(page, boundingBox, transformationMatrix)];
});
});
};
PDFPageEmbedder.prototype.embedIntoContext = function (context, ref) {
return __awaiter(this, void 0, void 0, function () {
var _a, Contents, Resources, decodedContents, _b, left, bottom, right, top, xObject;
return __generator(this, function (_c) {
_a = this.page.normalizedEntries(), Contents = _a.Contents, Resources = _a.Resources;
if (!Contents)
throw new MissingPageContentsEmbeddingError();
decodedContents = this.decodeContents(Contents);
_b = this.boundingBox, left = _b.left, bottom = _b.bottom, right = _b.right, top = _b.top;
xObject = context.flateStream(decodedContents, {
Type: 'XObject',
Subtype: 'Form',
FormType: 1,
BBox: [left, bottom, right, top],
Matrix: this.transformationMatrix,
Resources: Resources,
});
if (ref) {
context.assign(ref, xObject);
return [2 /*return*/, ref];
}
else {
return [2 /*return*/, context.register(xObject)];
}
return [2 /*return*/];
});
});
};
// `contents` is an array of streams which are merged to include them in the XObject.
// This methods extracts each stream and joins them with a newline character.
PDFPageEmbedder.prototype.decodeContents = function (contents) {
var newline = Uint8Array.of(CharCodes.Newline);
var decodedContents = [];
for (var idx = 0, len = contents.size(); idx < len; idx++) {
var stream = contents.lookup(idx, PDFStream);
var content = void 0;
if (stream instanceof PDFRawStream) {
content = decodePDFRawStream(stream).decode();
}
else if (stream instanceof PDFContentStream) {
content = stream.getUnencodedContents();
}
else {
throw new UnrecognizedStreamTypeError(stream);
}
decodedContents.push(content, newline);
}
return mergeIntoTypedArray.apply(void 0, decodedContents);
};
return PDFPageEmbedder;
}());
export default PDFPageEmbedder;
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