pdf-lib
Version:
Create and modify PDF files with JavaScript
116 lines • 5.05 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var PDFObject_1 = tslib_1.__importDefault(require("./PDFObject"));
var CharCodes_1 = tslib_1.__importDefault(require("../syntax/CharCodes"));
var utils_1 = require("../../utils");
var errors_1 = require("../errors");
var PDFString = /** @class */ (function (_super) {
tslib_1.__extends(PDFString, _super);
function PDFString(value) {
var _this = _super.call(this) || this;
_this.value = value;
return _this;
}
PDFString.prototype.asBytes = function () {
var bytes = [];
var octal = '';
var escaped = false;
var pushByte = function (byte) {
if (byte !== undefined)
bytes.push(byte);
escaped = false;
};
for (var idx = 0, len = this.value.length; idx < len; idx++) {
var char = this.value[idx];
var byte = utils_1.toCharCode(char);
var nextChar = this.value[idx + 1];
if (!escaped) {
if (byte === CharCodes_1.default.BackSlash)
escaped = true;
else
pushByte(byte);
}
else {
if (byte === CharCodes_1.default.Newline)
pushByte();
else if (byte === CharCodes_1.default.CarriageReturn)
pushByte();
else if (byte === CharCodes_1.default.n)
pushByte(CharCodes_1.default.Newline);
else if (byte === CharCodes_1.default.r)
pushByte(CharCodes_1.default.CarriageReturn);
else if (byte === CharCodes_1.default.t)
pushByte(CharCodes_1.default.Tab);
else if (byte === CharCodes_1.default.b)
pushByte(CharCodes_1.default.Backspace);
else if (byte === CharCodes_1.default.f)
pushByte(CharCodes_1.default.FormFeed);
else if (byte === CharCodes_1.default.LeftParen)
pushByte(CharCodes_1.default.LeftParen);
else if (byte === CharCodes_1.default.RightParen)
pushByte(CharCodes_1.default.RightParen);
else if (byte === CharCodes_1.default.Backspace)
pushByte(CharCodes_1.default.BackSlash);
else if (byte >= CharCodes_1.default.Zero && byte <= CharCodes_1.default.Seven) {
octal += char;
if (octal.length === 3 || !(nextChar >= '0' && nextChar <= '7')) {
pushByte(parseInt(octal, 8));
octal = '';
}
}
else {
pushByte(byte);
}
}
}
return new Uint8Array(bytes);
};
PDFString.prototype.decodeText = function () {
var bytes = this.asBytes();
if (utils_1.hasUtf16BOM(bytes))
return utils_1.utf16Decode(bytes);
return utils_1.pdfDocEncodingDecode(bytes);
};
PDFString.prototype.decodeDate = function () {
var text = this.decodeText();
var date = utils_1.parseDate(text);
if (!date)
throw new errors_1.InvalidPDFDateStringError(text);
return date;
};
PDFString.prototype.asString = function () {
return this.value;
};
PDFString.prototype.clone = function () {
return PDFString.of(this.value);
};
PDFString.prototype.toString = function () {
return "(" + this.value + ")";
};
PDFString.prototype.sizeInBytes = function () {
return this.value.length + 2;
};
PDFString.prototype.copyBytesInto = function (buffer, offset) {
buffer[offset++] = CharCodes_1.default.LeftParen;
offset += utils_1.copyStringIntoBuffer(this.value, buffer, offset);
buffer[offset++] = CharCodes_1.default.RightParen;
return this.value.length + 2;
};
// The PDF spec allows newlines and parens to appear directly within a literal
// string. These character _may_ be escaped. But they do not _have_ to be. So
// for simplicity, we will not bother escaping them.
PDFString.of = function (value) { return new PDFString(value); };
PDFString.fromDate = function (date) {
var year = utils_1.padStart(String(date.getUTCFullYear()), 4, '0');
var month = utils_1.padStart(String(date.getUTCMonth() + 1), 2, '0');
var day = utils_1.padStart(String(date.getUTCDate()), 2, '0');
var hours = utils_1.padStart(String(date.getUTCHours()), 2, '0');
var mins = utils_1.padStart(String(date.getUTCMinutes()), 2, '0');
var secs = utils_1.padStart(String(date.getUTCSeconds()), 2, '0');
return new PDFString("D:" + year + month + day + hours + mins + secs + "Z");
};
return PDFString;
}(PDFObject_1.default));
exports.default = PDFString;
//# sourceMappingURL=PDFString.js.map