pdf-lib
Version:
Create and modify PDF files with JavaScript
146 lines • 5.82 kB
JavaScript
import PDFDict from "../objects/PDFDict";
import PDFString from "../objects/PDFString";
import PDFHexString from "../objects/PDFHexString";
import PDFName from "../objects/PDFName";
import PDFNumber from "../objects/PDFNumber";
import PDFArray from "../objects/PDFArray";
import PDFRef from "../objects/PDFRef";
import { findLastMatch } from "../../utils";
import { MissingDAEntryError, MissingTfOperatorError } from "../errors";
// Examples:
// `/Helv 12 Tf` -> ['Helv', '12']
// `/HeBo 8.00 Tf` -> ['HeBo', '8.00']
// `/HeBo Tf` -> ['HeBo', undefined]
var tfRegex = /\/([^\0\t\n\f\r\ ]+)[\0\t\n\f\r\ ]*(\d*\.\d+|\d+)?[\0\t\n\f\r\ ]+Tf/;
var PDFAcroField = /** @class */ (function () {
function PDFAcroField(dict, ref) {
this.dict = dict;
this.ref = ref;
}
PDFAcroField.prototype.T = function () {
return this.dict.lookupMaybe(PDFName.of('T'), PDFString, PDFHexString);
};
PDFAcroField.prototype.Ff = function () {
var numberOrRef = this.getInheritableAttribute(PDFName.of('Ff'));
return this.dict.context.lookupMaybe(numberOrRef, PDFNumber);
};
PDFAcroField.prototype.V = function () {
var valueOrRef = this.getInheritableAttribute(PDFName.of('V'));
return this.dict.context.lookup(valueOrRef);
};
PDFAcroField.prototype.Kids = function () {
return this.dict.lookupMaybe(PDFName.of('Kids'), PDFArray);
};
// Parent(): PDFDict | undefined {
// return this.dict.lookupMaybe(PDFName.of('Parent'), PDFDict);
// }
PDFAcroField.prototype.DA = function () {
var da = this.dict.lookup(PDFName.of('DA'));
if (da instanceof PDFString || da instanceof PDFHexString)
return da;
return undefined;
};
PDFAcroField.prototype.setKids = function (kids) {
this.dict.set(PDFName.of('Kids'), this.dict.context.obj(kids));
};
PDFAcroField.prototype.getParent = function () {
// const parent = this.Parent();
// if (!parent) return undefined;
// return new PDFAcroField(parent);
var parentRef = this.dict.get(PDFName.of('Parent'));
if (parentRef instanceof PDFRef) {
var parent_1 = this.dict.lookup(PDFName.of('Parent'), PDFDict);
return new PDFAcroField(parent_1, parentRef);
}
return undefined;
};
PDFAcroField.prototype.setParent = function (parent) {
if (!parent)
this.dict.delete(PDFName.of('Parent'));
else
this.dict.set(PDFName.of('Parent'), parent);
};
PDFAcroField.prototype.getFullyQualifiedName = function () {
var parent = this.getParent();
if (!parent)
return this.getPartialName();
return parent.getFullyQualifiedName() + "." + this.getPartialName();
};
PDFAcroField.prototype.getPartialName = function () {
var _a;
return (_a = this.T()) === null || _a === void 0 ? void 0 : _a.decodeText();
};
PDFAcroField.prototype.setPartialName = function (partialName) {
if (!partialName)
this.dict.delete(PDFName.of('T'));
else
this.dict.set(PDFName.of('T'), PDFHexString.fromText(partialName));
};
PDFAcroField.prototype.setDefaultAppearance = function (appearance) {
this.dict.set(PDFName.of('DA'), PDFString.of(appearance));
};
PDFAcroField.prototype.getDefaultAppearance = function () {
var DA = this.DA();
if (DA instanceof PDFHexString) {
return DA.decodeText();
}
return DA === null || DA === void 0 ? void 0 : DA.asString();
};
PDFAcroField.prototype.setFontSize = function (fontSize) {
var _a;
var name = (_a = this.getFullyQualifiedName()) !== null && _a !== void 0 ? _a : '';
var da = this.getDefaultAppearance();
if (!da)
throw new MissingDAEntryError(name);
var daMatch = findLastMatch(da, tfRegex);
if (!daMatch.match)
throw new MissingTfOperatorError(name);
var daStart = da.slice(0, daMatch.pos - daMatch.match[0].length);
var daEnd = daMatch.pos <= da.length ? da.slice(daMatch.pos) : '';
var fontName = daMatch.match[1];
var modifiedDa = daStart + " /" + fontName + " " + fontSize + " Tf " + daEnd;
this.setDefaultAppearance(modifiedDa);
};
PDFAcroField.prototype.getFlags = function () {
var _a, _b;
return (_b = (_a = this.Ff()) === null || _a === void 0 ? void 0 : _a.asNumber()) !== null && _b !== void 0 ? _b : 0;
};
PDFAcroField.prototype.setFlags = function (flags) {
this.dict.set(PDFName.of('Ff'), PDFNumber.of(flags));
};
PDFAcroField.prototype.hasFlag = function (flag) {
var flags = this.getFlags();
return (flags & flag) !== 0;
};
PDFAcroField.prototype.setFlag = function (flag) {
var flags = this.getFlags();
this.setFlags(flags | flag);
};
PDFAcroField.prototype.clearFlag = function (flag) {
var flags = this.getFlags();
this.setFlags(flags & ~flag);
};
PDFAcroField.prototype.setFlagTo = function (flag, enable) {
if (enable)
this.setFlag(flag);
else
this.clearFlag(flag);
};
PDFAcroField.prototype.getInheritableAttribute = function (name) {
var attribute;
this.ascend(function (node) {
if (!attribute)
attribute = node.dict.get(name);
});
return attribute;
};
PDFAcroField.prototype.ascend = function (visitor) {
visitor(this);
var parent = this.getParent();
if (parent)
parent.ascend(visitor);
};
return PDFAcroField;
}());
export default PDFAcroField;
//# sourceMappingURL=PDFAcroField.js.map