@pdfme/pdf-lib
Version:
Create and modify PDF files with JavaScript
75 lines • 2.64 kB
JavaScript
import { MethodNotImplementedError } from '../errors';
import PDFName from './PDFName';
import PDFNumber from './PDFNumber';
import PDFObject from './PDFObject';
import CharCodes from '../syntax/CharCodes';
class PDFStream extends PDFObject {
constructor(dict) {
super();
Object.defineProperty(this, "dict", {
enumerable: true,
configurable: true,
writable: true,
value: void 0
});
this.dict = dict;
}
clone(_context) {
throw new MethodNotImplementedError(this.constructor.name, 'clone');
}
getContentsString() {
throw new MethodNotImplementedError(this.constructor.name, 'getContentsString');
}
getContents() {
throw new MethodNotImplementedError(this.constructor.name, 'getContents');
}
getContentsSize() {
throw new MethodNotImplementedError(this.constructor.name, 'getContentsSize');
}
updateDict() {
const contentsSize = this.getContentsSize();
this.dict.set(PDFName.Length, PDFNumber.of(contentsSize));
}
sizeInBytes() {
this.updateDict();
return this.dict.sizeInBytes() + this.getContentsSize() + 18;
}
toString() {
this.updateDict();
let streamString = this.dict.toString();
streamString += '\nstream\n';
streamString += this.getContentsString();
streamString += '\nendstream';
return streamString;
}
copyBytesInto(buffer, offset) {
this.updateDict();
const initialOffset = offset;
offset += this.dict.copyBytesInto(buffer, offset);
buffer[offset++] = CharCodes.Newline;
buffer[offset++] = CharCodes.s;
buffer[offset++] = CharCodes.t;
buffer[offset++] = CharCodes.r;
buffer[offset++] = CharCodes.e;
buffer[offset++] = CharCodes.a;
buffer[offset++] = CharCodes.m;
buffer[offset++] = CharCodes.Newline;
const contents = this.getContents();
for (let idx = 0, len = contents.length; idx < len; idx++) {
buffer[offset++] = contents[idx];
}
buffer[offset++] = CharCodes.Newline;
buffer[offset++] = CharCodes.e;
buffer[offset++] = CharCodes.n;
buffer[offset++] = CharCodes.d;
buffer[offset++] = CharCodes.s;
buffer[offset++] = CharCodes.t;
buffer[offset++] = CharCodes.r;
buffer[offset++] = CharCodes.e;
buffer[offset++] = CharCodes.a;
buffer[offset++] = CharCodes.m;
return offset - initialOffset;
}
}
export default PDFStream;
//# sourceMappingURL=PDFStream.js.map