1892861 - PDF viewer should better support 1 finger zoom gesture

Status: UNCONFIRMED

(GeckoView :: PDF Viewer, enhancement)

Description

[Winson Wen]

User Agent: Mozilla/5.0 (Linux; Android 14; Mobile; rv:127.0) Gecko/127.0 Firefox/127.0

Steps to reproduce:

Open Firefox and navigate to a pdf e.g. https://mozilla.github.io/pdf.js/web/compressed.tracemonkey-pldi-09.pdf

Attempt to use 1 finger zoom gesture (double-tap then drag down/up)

Actual results:

The whole pdf ui, including download toolbar, zooms in. The pdf gets blurrier the more you zoom in since it's not being redrawn at the new zoom levels.

Expected results:

The only pdf zooms without zooming the download toolbar. The pdf gets properly redrawn when zoomed in so it doesn't become blurry

Comment 2

[Winson Wen]

Not a dupe, that bug is about pdf's appearing blurry at high zoom levels since Firefox switches to CSS zoom, this is about pdf.js not intercepting the 1 finger zoom gesture so that zooming AT ANY LEVEL is not triggering re-rendering