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Add a new "pagesdestroy" event, dispatched *before* the BaseViewer removes an existing document

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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.
This commit is contained in:
Jonas Jenwald 2020-12-15 17:20:15 +01:00
parent 2a83c965e8
commit 0e69973d71
1 changed files with 6 additions and 0 deletions
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6
web/base_viewer.js
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@ -460,6 +460,8 @@ class BaseViewer {
*/ */
setDocument(pdfDocument) { setDocument(pdfDocument) {
if (this.pdfDocument) { if (this.pdfDocument) {
this.eventBus.dispatch("pagesdestroy", { source: this });
this._cancelRendering(); this._cancelRendering();
this._resetView(); this._resetView();
@ -1555,6 +1557,10 @@ class BaseViewer {
eventBus._on("pagesinit", () => { eventBus._on("pagesinit", () => {
dispatchPageOpen(this._currentPageNumber); dispatchPageOpen(this._currentPageNumber);
}); });
eventBus._on("pagesdestroy", () => {
dispatchPageClose(this._currentPageNumber);
});
} }
} }