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chore(pdfjs): log event bus

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Elian Doran 2025-12-29 13:23:54 +02:00
parent 9e0c29496f
commit 406232c478
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1 changed files with 49 additions and 31 deletions
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80
packages/pdfjs-viewer/src/custom.ts
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@ -1,3 +1,5 @@
const LOG_EVENT_BUS = true;
async function main() {
// Wait for the PDF viewer application to be available.
while (!window.PDFViewerApplication) {
@ -5,40 +7,56 @@ async function main() {
}
const app = window.PDFViewerApplication;
await app.initializedPromise;
if (LOG_EVENT_BUS) {
patchEventBus();
}
app.eventBus.on("documentloaded", () => {
const storage = app.pdfDocument.annotationStorage;
let timeout = null;
function debouncedSave() {
if (timeout) {
clearTimeout(timeout);
}
timeout = setTimeout(async () => {
if (!storage) return;
const data = await app.pdfDocument.saveDocument();
window.parent.postMessage({
type: "pdfjs-viewer-document-modified",
data: data
}, "*");
storage.resetModified();
timeout = null;
}, 2_000);
}
app.eventBus.on("annotationeditorcommit", debouncedSave);
app.eventBus.on("annotationeditorparamschanged", debouncedSave);
app.eventBus.on("annotationeditorstateschanged", evt => {
const { activeEditorId } = evt;
// When activeEditorId becomes null, an editor was just committed
if (activeEditorId === null) {
debouncedSave();
}
});
manageSave(app);
});
await app.initializedPromise;
};
function manageSave(app: typeof window.PDFViewerApplication) {
const storage = app.pdfDocument.annotationStorage;
let timeout = null;
function debouncedSave() {
if (timeout) {
clearTimeout(timeout);
}
timeout = setTimeout(async () => {
if (!storage) return;
const data = await app.pdfDocument.saveDocument();
window.parent.postMessage({
type: "pdfjs-viewer-document-modified",
data: data
}, "*");
storage.resetModified();
timeout = null;
}, 2_000);
}
app.eventBus.on("annotationeditorcommit", debouncedSave);
app.eventBus.on("annotationeditorparamschanged", debouncedSave);
app.eventBus.on("annotationeditorstateschanged", evt => {
const { activeEditorId } = evt;
// When activeEditorId becomes null, an editor was just committed
if (activeEditorId === null) {
debouncedSave();
}
});
}
function patchEventBus() {
const eventBus = window.PDFViewerApplication.eventBus;
const originalDispatch = eventBus.dispatch.bind(eventBus);
eventBus.dispatch = (type: string, data?: any) => {
console.log("PDF.js event:", type, data);
return originalDispatch(type, data);
};
}
main();
console.log("Custom script loaded");