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fix(pdf_layers): toggling layers and updating state not working

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This commit is contained in:
Elian Doran 2025-12-29 23:57:52 +02:00
parent 574138a1fb
commit 79f03ad3ac
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1 changed files with 29 additions and 11 deletions
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40
packages/pdfjs-viewer/src/layers.ts
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@ -18,8 +18,12 @@ async function extractAndSendLayers() {
const app = window.PDFViewerApplication;
try {
const optionalContentConfig = await app.pdfDocument.getOptionalContentConfig();
// Get the config from the viewer if available (has updated state), otherwise from document
const pdfViewer = app.pdfViewer;
const optionalContentConfig = pdfViewer?.optionalContentConfigPromise
? await pdfViewer.optionalContentConfigPromise
: await app.pdfDocument.getOptionalContentConfig();
if (!optionalContentConfig) {
window.parent.postMessage({
type: "pdfjs-viewer-layers",
@ -53,15 +57,22 @@ async function extractAndSendLayers() {
};
flattenOrder(order);
// Get group details for each ID
// Get group details for each ID and only include valid, toggleable layers
const layers = groupIds.map(id => {
const group = optionalContentConfig.getGroup(id);
// Only include groups that have a name and usage property (actual layers)
if (!group || !group.name || !group.usage) {
return null;
}
// Use group.visible property like PDF.js viewer does
return {
id,
name: group?.name || `Layer ${id}`,
visible: optionalContentConfig.isVisible(id)
name: group.name,
visible: group.visible
};
}).filter(layer => layer.name); // Filter out invalid layers
}).filter(layer => layer !== null); // Filter out invalid layers
window.parent.postMessage({
type: "pdfjs-viewer-layers",
@ -80,17 +91,24 @@ async function toggleLayer(layerId: string, visible: boolean) {
const app = window.PDFViewerApplication;
try {
const optionalContentConfig = await app.pdfDocument.getOptionalContentConfig();
const pdfViewer = app.pdfViewer;
if (!pdfViewer) {
return;
}
const optionalContentConfig = await pdfViewer.optionalContentConfigPromise;
if (!optionalContentConfig) {
return;
}
// Set visibility
// Set visibility on the config (like PDF.js viewer does)
optionalContentConfig.setVisibility(layerId, visible);
// Trigger re-render
app.eventBus.dispatch("optionalcontentconfigchanged");
// Dispatch optionalcontentconfig event with the existing config
app.eventBus.dispatch("optionalcontentconfig", {
source: app,
promise: Promise.resolve(optionalContentConfig)
});
// Send updated layer state back
await extractAndSendLayers();