From 0e69973d710f80ad0ced5048837f774de3635a9d Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Tue, 15 Dec 2020 17:20:15 +0100
Subject: [PATCH] Add a new "pagesdestroy" event, dispatched *before* the
`BaseViewer` removes an existing document
This new event essentially mirrors the existing "pagesinit" event, and will allow e.g. a custom implementation of the viewer to be notified before the current PDF document is removed from the viewer.
By using this new event, we're thus able to dispatch a "pageclose" event for JavaScript actions when closing the existing document.
---
web/base_viewer.js | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/web/base_viewer.js b/web/base_viewer.js
index 1bbff87eb..df50b3761 100644
--- a/web/base_viewer.js
+++ b/web/base_viewer.js
@@ -460,6 +460,8 @@ class BaseViewer {
*/
setDocument(pdfDocument) {
if (this.pdfDocument) {
+ this.eventBus.dispatch("pagesdestroy", { source: this });
+
this._cancelRendering();
this._resetView();
@@ -1555,6 +1557,10 @@ class BaseViewer {
eventBus._on("pagesinit", () => {
dispatchPageOpen(this._currentPageNumber);
});
+
+ eventBus._on("pagesdestroy", () => {
+ dispatchPageClose(this._currentPageNumber);
+ });
}
}