all files / core/compression/ run-length-stream.js

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/* istanbul ignore next */ 
var __extends = (this && this.__extends) || (function () {
    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
})();
define(["require", "exports", "../decode-stream"], function (require, exports, decode_stream_1) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    var _PdfRunLengthStream = (function (_super) {
        __extends(_PdfRunLengthStream, _super);
        function _PdfRunLengthStream(str, maybeLength) {
            var _this = _super.call(this, maybeLength) || this;
            _this.stream = str;
            _this.dict = str.dict;
            return _this;
        }
        _PdfRunLengthStream.prototype.readBlock = function () {
            var repeatHeader = this.stream.getBytes(2);
            if (!repeatHeader || repeatHeader.length < 2 || repeatHeader[0] === 128) {
                this.eof = true;
                return;
            }
            var buffer;
            var bufferLength = this.bufferLength;
            var n = repeatHeader[0];
            if (n < 128) {
                buffer = this.ensureBuffer(bufferLength + n + 1);
                buffer[bufferLength++] = repeatHeader[1];
                if (n > 0) {
                    var source = this.stream.getBytes(n);
                    buffer.set(source, bufferLength);
                    bufferLength += n;
                }
            }
            else {
                n = 257 - n;
                buffer = this.ensureBuffer(bufferLength + n + 1);
                buffer.fill(repeatHeader[1], bufferLength, bufferLength + n);
                bufferLength += n;
            }
            this.bufferLength = bufferLength;
        };
        return _PdfRunLengthStream;
    }(decode_stream_1._PdfDecodeStream));
    exports._PdfRunLengthStream = _PdfRunLengthStream;
});