@cantoo/pdf-lib
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Create and modify PDF files with JavaScript
60 lines • 2.3 kB
JavaScript
import PDFDict from '../objects/PDFDict.js';
import PDFName from '../objects/PDFName.js';
import PDFAcroField from './PDFAcroField.js';
import PDFWidgetAnnotation from '../annotation/PDFWidgetAnnotation.js';
import { IndexOutOfBoundsError } from '../errors.js';
class PDFAcroTerminal extends PDFAcroField {
FT() {
const nameOrRef = this.getInheritableAttribute(PDFName.of('FT'));
return this.dict.context.lookup(nameOrRef, PDFName);
}
getWidgets() {
const kidDicts = this.Kids();
// This field is itself a widget
if (!kidDicts)
return [PDFWidgetAnnotation.fromDict(this.dict)];
// This field's kids are its widgets
const widgets = new Array(kidDicts.size());
for (let idx = 0, len = kidDicts.size(); idx < len; idx++) {
const dict = kidDicts.lookup(idx, PDFDict);
widgets[idx] = PDFWidgetAnnotation.fromDict(dict);
}
return widgets;
}
addWidget(ref) {
const { Kids } = this.normalizedEntries();
Kids.push(ref);
}
removeWidget(idx) {
const kidDicts = this.Kids();
if (!kidDicts) {
// This field is itself a widget
if (idx !== 0)
throw new IndexOutOfBoundsError(idx, 0, 0);
this.setKids([]);
}
else {
// This field's kids are its widgets
if (idx < 0 || idx > kidDicts.size()) {
throw new IndexOutOfBoundsError(idx, 0, kidDicts.size());
}
kidDicts.remove(idx);
}
}
normalizedEntries() {
let Kids = this.Kids();
// If this field is itself a widget (because it was only rendered once in
// the document, so the field and widget properties were merged) then we
// add itself to the `Kids` array. The alternative would be to try
// splitting apart the widget properties and creating a separate object
// for them.
if (!Kids) {
Kids = this.dict.context.obj([this.ref]);
this.dict.set(PDFName.of('Kids'), Kids);
}
return { Kids };
}
}
PDFAcroTerminal.fromDict = (dict, ref) => new PDFAcroTerminal(dict, ref);
export default PDFAcroTerminal;
//# sourceMappingURL=PDFAcroTerminal.js.map